Purified proteins and process therefor
7 claims: 3 independent, 4 dependent
- 1RIVENDICAZIONI 1. Interferon come proteina omogenea.
- 2Interferon omogeneo secondo la rivendicazione 1, caratterizzato dal fatto di essere Interferon umano.
- 3Interferon umano omogeneo secondo la rivendicazione 2, caratterizzato dal fatto che si tratta di Interferon di leucociti.
- 4Interferon di leucociti umani omogeneo con la - 38 - Ing. Barzanò Zanardo denominazione α η , il quale è caratterizzato dal fatto ché \...· .·?· · · · · 1 (a) esso viene eluito mediante eluizione a gradienti *.’*·· !.. • · con n-propanolo in un tampone acquoso contenente ·** ·„·*··· ·.. 1 mole di piridina e 2 moli di acido formico per o- ····:.··. ♦ ·· gni litro (gradiente 0-40% (v/v), temperatura ambiente»*/ • ... • · · · · * · portata di flusso 0,2 rnl/min), a una concentrazione ....ί ζ·· • · · · tt tttt · · · di 31% di n-propanolo in un unico picco dà- una co***** » · · · * lonna per HPLC di 4,6 x 250 mm a bse di una matrice di Si0 2 modificata con gruppi ottilici;(b) esso non viene disattivato da leucinamminopeptida c si e da amminopeptidasi M;(c) esso viene scisso mediante trattamento con tripsina in frammenti di peptidi, che vengono eluiti mediante eluizione a gradienti della miscela di reazione con n-propanolo in una sostanza-tampone acquosa (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,
- 55 ml/minuto) in picchi in corrispondenza di concentrazioni di 3, 4, 4,2, 11,5, 12,5, 14,5, 16, 18, 20, 21, 22,5 e 29% di n-propanolo da una colonna per HPLC da 4,6 x 250 mm (diametro delle particelle 10 micron) a base di una matrice di SiO^ modificata con gruppi ottilici; e che è inoltre caratterizzato da Zanardo 10 w unite/ - 39 - Ing. Barzanò (d) un amminoacido N-terminale bloccato; (e) una attività specifica di circa 2,6 x /mg su MDBK (cellule di bue); (f) una attività specifica di circa 2,6 x su cellule di Ag 1732 (linea umana) ; .♦·· • « / ** · * (g) un peso molecolare di circa 16.500 + 1000 (elet- φ · 9 « * *·· troforesi su gel su poliacrilammide); ···· • · * « « (h) un contenuto in amminozuccheri inferiore a 1 molò*·*! * z '····* a a a a * per mole; (i) una attività di inibizione della crescita positiva; e (j) la seguente composizione in amminoacidi (+ 15%, calcolato su un peso molecolare di 16.500); • 9 * · · * ··* * _ · ·· 10 unit/mp·;· a* k a · a a a la denominazione a 2 , il quale è caratterizzato dal fatto che esso (a) viene eluito mediante eluizione a gradienti con n-propanolo in una sostanza-tampone acquosa, contenente 1 mole di piridina e 2 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura am- 40 - Ing. Barzanò Zanardo biente, portata di flusso 0,2 ml/minuto, a una concentrazione di 32% di n-propanolo in un unico picco .····. U una colonna HPLC da 4,6 x 250 mm a base di una ma-Λ*.*.. . ··· *··:. trice di SiO^ modificata con gruppi ottilici;• · · · * (b) esso non viene disattivato da leucinammi'nopepti '· • * * * dasi e da amminopeptidasi ’··ί. • · « « (c) esso viene scisso mediante trattamento con trip- ·’··*. • · * sina in frammenti di peptidi, che vengono eluiti me-:.;.. » *···· diante eluizione 1 a gradienti della miscela di rea- ..... zione con n-propanolo in una sostanza-tampone acquosa (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,5 ml/minuto) in picchi a concentrazioni di 3, 4, 4,2, 11,5, 12,5, 14,5, 16, 18, 27 e 29% di n-propanolo da una colonna-HPLC di 4,6 x 250 mm (diametro delle particelle 10 micron) a base di una matrice di SiO^ modificata con gruppi ottilici;(d) esso viene eluito mediante eluizione a gradienti con n-propanolo in tampone acetato di sodio 1 molare, acquoso (gradiente 72,5-50% v/v), temperatura ambiente, portata di flusso 0,25 ml/minuto) con una concentrazione di 68% di n-propanolo in un unico picco da. una colonna HPLC da 4,6 x 250 mm a base di una matrice dì SiO^ modificata con gruppi glicerilici;e - 41 - Ing. Barzanò Zanardo che inoltre è caratterizzato da' (e) un amminoacido N-terminale bloccato;*·.· 8 * *.*·* * (f) una attività specifica di circa 4,0 x 10 unità/ 1 *^;;v * · ··.. su MDBK (cellule di bue);8 / *·’ * * * (g) una attività specifica di circa 3 x 10 unità/mg,··... ··*·* su cellule di Ag 1732 (linea umana);*··*;• · • 4 (h) un peso molecolare di circa 16.200 + 1000 (elet-****· .. · troforesi su gel su poiiacri1ammidé);I.J.. (i) un contenuto in amminozuccheri inferiore a 1 mol*e* ” per mole;(j) una attività di inibizione della crescita positiva e (k) la seguente composizione in amminoacidi (+ 15%, calcolato su un peso molecolare di 16.200): 4 *
- 66· Interferon di leucociti umani omogeneo con la denominazione β 2 , il quale è caratterizzato dal fatto che (a) esso viene eluito mediante eluizione a gradienti con n-propanolo in una sostanza-tampone acquosa, con- 42 - Ing e Barzanò Zanardo tenente 1 mole di piridina e 2 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente»·. ·· · · portata di flusso 0,2 ml/minuto), a una concentrazione*· · .:*:* ·· ·. di 32% di n-propanolo in un unico picco da una co* 4 444 lonna-HPLC di 4,6 x 250 mm a base di una matrice di '4 « · · · SiO- modificata con gruppi ottilici;*··:. 2 · 4 4 • · (b) esso non viene disattivato da leucinamminopej) ***** .. · tidasi e da amminopeptidasi M;• 4 4 4 (c) esso viene scisso mediante trattamento con trip-···** sina in frammenti di peptidi, che vengono eluiti mediante eluizione a gradienti della miscela di reazione con n-propanolo in una sostanza-tampone acquosa (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,5 ml/minuto) in picchi in corrispondenza di concentrazioni di 3, 4, 4,2, 11,5, 12,5, 14,5, 16, 17,5, 18 e 29% di n-propanolo da una colonna-HPLC di 4,6 x 250 mm (diametro delle particelle 10 micron) a base di una matrice di SiO 2 modificata con gruppi ottilici;(d) esso viene eluito mediante eluizione a gradienti con n-propanolo in tampone acetato di sodio acquoso, 1 molare (gradiente 72,5-50% (v/v), temperatura ambiente, portata di flusso 0,25 ml/minuto) a una concentrazione di 66,5% in un unico picco da una colonna- 43 - Ing. Barzanò Zanardo HPLC di 4,6 x 250 mm a base di una matrice di SiO^ modificata con gruppi glicerilici;e che inoltre è .... • · • tt · · caratterizzato da . ··* (e) un amminoacido N-terminale bloccato;· (f) una attività specifica di circa 4,0 x 10 unità/W • su MDBK (cellule di bue);·;*·’ • (g) una attività specifica di circa 2 x 10 unitè/mg*····’ su cellule di Ag 1732 (linea umana);f.J.. ' ····* (h) un peso molecolare di circa 16.500 + 1000 (elet—···· troforesi su gel su poliacrilammide);(i) un contenuto in amminozuccheri inferiore a 1 mole per moie;(j) una attività di inibizione di crescita positiva e (k) la seguente composizione in amminoacidi (+ 15%, calcolato su un peso molecolare di 16.500);·· tt tt tt fatto che esso (a) viene eluito mediante eluizione a gradienti con - 44 - Ing* Barzanò Zanardo n-propanólo in una so stanza^- tampone acquosa, contenente 1 «ole di piridina e 2 moli di acido formico .····. • 4 4 · per litro (gradiente 0-40% (v/v), temperatura ambienfcVt·;*“* ·* * ···· ..... portata di flusso 0,2 ml/minuto), a una concentra- ···· ··* · · · 4 ·*···♦ · 4 » zione di 32% di n-propanolo in un unico picco da una.·.*... ,··;* · ·’ * colonna HPLC di 4,6 x 250 mm a base di una matrice ’·♦·· ΐ , I . / · · · · *4 * * * ** di Si0_ modificata mediante gruppi ottilici;£*** ΪΛ. « 4 * * * · (b) non viene disattivato da leucinamminopeptidasi i*i*. I ·«·«, e da amminopeptidasi M;(c) viene scisso mediante trattamento con tripsina in frammenti di peptidi, che vengono eluiti mediante eluizione a gradienti della miscela di reazione con n-propanolo in una sostanza-tampone acquosa (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,5 ml/minuto) in picchi in corrispondenza di concentrazioni di 3, 4, 4,2, 4,5, 10, 12,5, 14, 14,5, 16, 18, 19,5, 27 e 32% di n-propanolo da una colonna HPLC di 4,6 x 250 mm (diametro delle particelle 10 micron) a base di una matrice di SiO^ modificata -con gruppi ottilici;e che inoltre è caratterizzato da (d) un amminoacido N-terminale bloccato;g (e) una attività specifica di circa 4,0 x 10 unità/mg su MDBK. (cellule di bue);l'ng. Barzanò Zanardo β (£) una attività specifica di circa $ x 10 unità/ms su cellule di Ag 1732 (linea umana);• · · · (g) un peso molecolare di circa 21.000 + 1000 (elet-*·.,·* • · · • » · · · troforesi su gel su poiiacri1ammide);*· ·. (h) un contenuto in amminozuccheri inferiore a 1 mol$;;;· • · * · · :· per mole;···.;.... *··· (ì) un’attività di inibizione di crescita positiva ς .· • · ···· (j) la seguente composizione di ammino'acidi *····. 8· Interferon di leucociti umani omogeneo con la denominazione γ , il quale è caratterizzato dal fatto che esso (a) viene eluito mediante eluizione a gradienti con n-propanolo in una sostanza-tampone acquosa, contenente 1 mole di piridina e 2 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,2 ml/minuto), a una concentrazione di 31% di n-propanolo in un unico picco da una colonna HPLC di 4,6 x 250 mm a base di una matrice di SiO^ modificata con gruppi ottilici;- 46 - Ing· Barzanò Zanardo (b) non viene disattivato da leucinamminopeptidasi e dà amminopeptidasi M;• · · 4 4 4 (c) viene scisso mediante trattamento con tripsina . ···· * t 4 · * in frammenti di peptidi, che vengono eluiti mediante·..;. ;··· • 4 • 4 4 4 4 eluizione a gradienti della miscela di reazione con . ;acquosa ·· n-propanolo in una sostanza-tampone Z(pH 3), conte- . J* * * : · · · nente 0,03 moli di piridina e 0,1 moli di acido for-.· ·. • · 4 * « * * · ♦ · mico per litro (gradiente 0-40% (v/v), temperatura .·..··. • · 4 4«· ambiente, portata di flusso 0,5 ml/minuto) in picchi...,;» 4 4 4 * in corrispondenza di concentrazioni di 3, 4, 4,2', 4,5, 6,5, 11,5, 12,5, 14,5, 16, 17,5, 18 e 29% di n-propanolo da una colonna-HPLC di 4,6 x 250 mm (diametro delle particelle 10 micron) a base di una matrice dì Si0 2 modificata con gruppi ottilici;e che inoltre è caratterizzato da (d) un aminoacido N-terminale bloccato;β (e) una attività specifica di circa 2,6 x 10 unità/ /mg su MDBK (cellule di bue);g (f) una attività specifica di circa 2 x 10 unitV m 5 su cellule di Ag 1732 (linea umana);(g) un peso molecolare di circa 17*700 + 1000 (elettroforesi su gel su poliacrilammide);(h) un contenuto in animino zuccheri inferiore a 1 mole per mole;(i) una attività di inibizione della crescita posi- 47 ~ Ing. Barzanò Zanardo tiva e (j) la seguente composizione in amminoacidi (+ 15%. calcolato su un peso molecolare di 17*700);• · '· · «tttt - ____ - -____-___________.. -- .. - --___ -ΣΑ tttttttt 4 9· Interferon di leucociti umani omogeneo con la denominazione Y^ , il quale è caratterizzato dal fatto che esso (a) viene eluito mediante eluizione a gradienti con n-propanolo in una sostanza-tampone .acquosa, contenente 1 mole di piridina e 2 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,2 ml/minuto), con una concentrazione di 32% di n-propanolo in un unico picco da una colonna di HPLC di 4,6 x 250 mm a base di una matrice di SiO^ modificata con gruppi ottilici;(b) non viene disattivato da leucinamminopeptidasi e da amminopeptidasi M;(c) viene scisso mediante trattamento con tripsina in frammenti di peptidi, che vengono eluiti mediante eluizione a gradienti della miscela di reazione Ing· Barzémò Zanardo con n-propanolo in una sostanza-tampone acquosa (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40%(v/v), tempe—ζ.,*· mm una e ratura ambiente, portata di flusso 0,5 ml/minuto) *·· ϊ. • in picchi i/Zv corrispondenza di concentrazioni di ····· • · · ·. 4 :· 3, 4, 4,2, 4,5, 5, 11,5, 12,5, 14,5, 16, 18 e 29% ····: di n-propanolo da una colonna-HPLC di 4,6 x 250 (diametro delle particelle 10 micron) a base di matrice di SiO^ modificata con gruppi ottilici;che inoltre è caratterizzato da ! (d) un amminoacido N-terminale bloccato;(e) una attività specifica di circa 4,0 x 10 unità/ /mg su MDBK (cellule di bue);(f) una attività specifica di circa 1,5 x 10 unitV /mg su cellule di Ag 1732 (linea umana);(g) un peso molecolare di circa 17*700 + 1000 (elettroforesi su gel su poliacrilammide);(h) un contenuto in amminozuccheri inferiore a 1 mole per mole;(i) una attività di inibizione di crescita positiva e (j) la seguente composizione in amminoacidi (+ 15%, calcolato su un peso molecolare di 17*700): ·· · · » • « 4 • _· fc·· • 4 -49 - Ing· Barzanò Zanardo 10. Interferon di leucociti umani omogeneo con la denominazione Yy , il quale è caratterizzata dal fatto che esso (a) viene eluito mediante eluizione a gradienti con .· ·· » 4 ·· · · n-propanolo in una sostanza-tampone acquosa, conte- ;;;;;nente 1 mole di piridina e 2 moli di acido formico ♦ · * · per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,2 ml/minuto), a una concentrazione di 34% di n-propanolo in un unico picco....;da una colonna HPLC di 4,6 x 250 mm a base di una matrice di Si0 2 modificata con gruppi ottilici;(b) non viene disattivato da leucinamminopeptidasi e da awiinopeptidasi M;(c) viene scisso mediante trattamento con tripsina in frammenti di peptidi, che vengono eluiti mediante eluizione a gradienti della miscela di reazione con n-propanolo in una sostanza-tampone acquosi! (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,5 ml/min.) in picchi a concentrazioni di 3, 4, 4,2, 11,5, 12,5, 13,5, 14,5, 16, 18, 20 e 32% di n-propanolo da una colonna HPLC di 4,6 x 250 mm,( diametro delle particelle 10 micron) a base di una matrice di Sio^ modificata con gruppi ottilici;e che è inoltre ca- 50 - Ing. Barzanò Zanardo ratterizzato da (a) un amminoacido N-terminale bloccató;(e) una attività specifica di circa 3,5 x 10 unità/*·..,.·* SXC ;··· /mg su MDBK (cellule di bue);.;*!* .... • tt 8 t · ··· · (f) una attività specifica di circa 1,5 x 10 unità/····· I . ·.···· · · · 0 · · « · · /mg su cellule di Ag 1732 (linea umana) ;”· **;. ···:. · . ί (g) un peso molecolare di circa 17.200 + 1000 (elet-. .· ··*·* ” tttt·*· •·tt · · *· troforesi su gel su poliacrilammide);***** .... w · tt · (h) un contenuto in amminozuccheri inferiore a 1 mol^.,· tttttttt* per mole;(i) una attività di inibizione di crescita positiva e (j) la seguente composizione in amminoacidi: 11. Interferon di leucociti umani omogeneo con la denominazione Y^ , il quale è caratterizzato dal fatto che esso (a) viene eluito mediante eluizione a gradienti con n-propanolo in una so stanza-tampone acquosa, contenente 1 mole di piridina e 2 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,2 ml/minuto), a una con- 51 - Ing. Barzanò Zanardo centratone di 35% di n-propanolo in un unico picco da una colonna-HPLC di 4,6 x 250 mm a base di una ·· * · a a matrice disio. modificata con gruppi ottilici;.7.7. 2 ··· • · * * (b) non viene disattivato da leucinaiaminopeptidasi * « · · ♦ e da amminopeptidasi M;e che inoltre è caratterizΛ*... a zato da ,·»· a a *· · a (c) un amminoacido N-terminale bloccato;? *, * a a · 8 a a aa a (d) una attività specifica di circa 3,5 x 10 unitVw * » · * aaa aaa **· a a a a a su MDBK (cellule di bue);g (e) una attività specifica di circa 4,0 x 10 unitV /mg su cellule di Ag 1732 (linea umana);(f) un peso molecolare di circa 21.000 + 1000 (elettroforesi su gel su poliacrilammide);(g) un contenuto in amminozuccheri inferiore a 1 mole per mole;(h) una attività di inibizione di crescita positiva e (i) la seguente composizione in amminoacidi (+ 15%, i calcolato su un peso molecolare di 21.000): - 52 - Ing· Barzanò Zanardo 12· Interferon di leucociti umani omogeneo con la denominazione Y c , il quale è caratterizzato dal 2 ·· · · * · • « « · fatto che esso 7.·.·* • · · · • ** (a) viene eluito mediante eluizione a gradienti con ;to · * · * · · · to « n-propanolo in una sostanza-tampone acquosa, conte- , « * * » · ·· · · i · · * nente 1 mole di piridina e 2 moli di acido formico .··;· .·· ··., · * : per litro (gradiente 0-40% (v/v), temperatura am- ·*...’· ·., • ♦ · to biente, portata di flusso 0,2 ml/minuto), a una con-.··. · ·*.*·* centrazione di 31% di n-propanolo in un unico picco *'**: da una colonna HPLC di 4,6 x 250 mm a base di una matrice di SiO^ modificata con gruppi ottilici;(b) non viene disattivato da leucinamminopeptidasi e da anminopeptidasi M;(c) viene scisso mediante trattamento con tripsina in frammenti di peptidi, che vengono eluiti mediante eluizione a gradienti della miscela di reazione con n-propanolo in una sostanza-tampone acquosa (pH 3), contenente 0,03 moli di piridina e 0,1 moli di acido formico per litro (gradiente 0-40% (v/v), temperatura ambiente, portata di flusso 0,5 ml/minuto) in picchi a concentrazioni di 3, 4, 4,2, 4,5, 7, 7,5, 10, 11,5, 12,5, 14, 14,5, 16, 18, 24,5, 25,5 e 32% di n-propanolo da una colonna-HPLC di 4,6 x 250 mm (diametro delle particelle 10 micron) a base di una matrice di SiO^ modificata con gruppi ottilici;e - 53 - Ing. Barzanò Zanardo V.-. che inoltre è caratterizzato da (d) un aroninoacido N-terminale bloccato;·· · · 8 *· ·* (e) una attività specifica di circa 0,9 x 10 unitV • · · · · • · ·· /mg su MDBK (cellule di bue);*·*:, • (f) una attività specifica di circa 2 x 10 unità/ m EJ su cellule di Ag 1732 (linea umana);...;· ·· ·. (g) un peso molecolare di circa 16.500 + 1000 (elet-.· ζ » troforesi su gel su poliacrilammide);.... · (h) un contenuto in amminozuccheri inferiore a 1 molè·· per mole;(i) una attività di inibizione di crescita positiva e (j) la seguente composizione in amminoacidi: « • · · ··· * · • · ♦ dicazioni da 1 a 12 come sostanza attiva antivirale. 15. Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 come sostanza attiva antitumorale - 54 - Ing. Barzanò Zanardo 16. Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 come sostanza attiva che inibisce la crescita. 17. Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 come sostanza attiva immunosoppressiva. *44* • 4* * • 4 * · » · ·* 18. Procedimento per la purificazione di protei-.* *44· ne aventi un peso molecolare superiore a circa 12.00Cl F · 4 · caratterizzato dal fatto che si fa passare una so- ····· »«*·· luzione acquosa della proteina non pura attraverso a una colonna equilibrata con una sostanza-tampone, a base di una matrice di SiO^ porosa modificata con gruppi cian-propilici, cicloesilici, fenilici, ottilici, ottadecilici oppure glicerilici in condizioni di HPLC, in cui la proteina dapprima viene adsorbita e, quindi, viene eluita con un gradiente crescente o con un gradiente decrescente di un solvente miscibile con acqua in modo che essa, alla fine, viene ottenuta in determinate frazioni dell'eluato in forma più pura. 19. Procedimento per la purificazione di proteine aventi un peso molecolare superiore a circa 12.000, caratterizzato dal fatto che si fa passare una soluzione acquosa della proteina non pura attraverso a una colonna equilibrata con una sostanza-tampone, 4 4 4 4 4 4 4 • ♦ · 4 4 4 4 «4* 4 4 4 · • 4 4« 4 4 4 4 - 55 - Ing· Barzanò Zanardo a base di una matrice di Si0 2 porosa modificata con gruppi ottilici odiare con gruppi glicerilici in con« · · · • · dizioni di HPLC, in cui la proteina dapprima viene ·*’.*.*. ·*··*· * ·· adsorbita e quindi viene eluita con un gradiente *··:, crescente oppure con un gradiente decrescente di un JUZI 1· to · · · « solvente miscibile con acqua in modo che essa, al- ....· ·· * to * la P-fn*, viene ottenuta in determinate frazioni · · to · dell'eluato in forma più pura· .. · • » » · · to 20.Procedimento per la preparazione di Interferoh**·· come proteina omogenea, caratterizzato dal fatto che A) si fa passare una soluzione acquosa di Interferon, nello stato non puro, in condizioni di HPLC, attraverso a una colonna equilibrata con una sostan za-tai»pone a base di una matrice di SiO^ modificata con gruppi ottilici, in cui 1'Interferon dapprima viene adsorbito e quindi viene eluito con un gradiente crescente di un solvente miscibile con acqua in una sostanza-tampone in modo che esso viene ottenuto in determinate frazioni dell’eluato in forma più pura;B) si fanno passare queste frazioni determinate ottenute nella fase A) attraverso a una colonna equilibrata con una sostanza-tampone a base di una matrice di SiO^ modificata con gruppi glicerilici, in cui 1’Interferon viene dapprima adsorbito e quindi to - 56 - Ing. Barzanò Zanardo viene eluito con un gradiente decrescente di un solvente miscibile con acqua in una sostanza-tampone, ·· ♦ · • · in modo che esso viene ottenuto, in picchi principali·/.·.·· ····« · · · · *·** ?*·* ben marcati, in determinate frazioni dell’eluato in ’···· · * 9 · a a • » · a · · forma più pura;·.·.··· ····;·... C) si fanno passare chieste frazioni ottenute nella ..·;· ***. **;* · · • « 9 9 9 9 fase B), che corrispondono ai picchi principali ben ·,,,.· ,··..· * · a a · marcati, in condizioni di HPLC, attraverso a una co-.··. · f.\;lonna equilibrata con una sostanza-tampone a base .‘**1 di una matrice di Si0 2 modificata con gruppi ottilici, in cui l’Interferon dapprima viene adsorbito e quindi viene eluito con una miscela di un solvente miscibile con acqua e di una so stanza-tampone acquosa, in modo che lo si ottiene in un unico picco ben marcato in determinate frazioni dell’eluato sotto forma di proteina omogenea ed eventualmente si ripete la fase C) allo scopo di raggiungere un grado di purezza estremamente elevato del prodotto. 21. Procedimento secondo la rivendicazione 20, caratterizzato dal fatto che si parte da Interferon umano. 22. Procedimento secondo la rivendicazione 21, caratterizzato dal fatto che si parte da Interferon di leucociti. 23. Procedimento secondo la rivendicazione 22, - 57 - Ing. Barzanò Zanardo caratterizzato dal fatto che, come solvente miscibile con acqua, si impiega un alcanolo oppure un etere ciclico· .7.’.. ···· 24· Procedimento secondo la rivendicazione 23, ·;*·' ;··· • · • toto » · caratterizzato dal fatto che, come solvente miscibile”··’ Z . *····*-.· ···· con acqua, si impiega n-propanolo, nella fase A) si *;· ;· ,. . · · · · impiega una sostanza-tampone avente un pH di circa .· . ···· * · · · ·* * · • · · · ·
- 77,5 e nella fase b) si impiega una sostanza-tampone *“*; .. · toto · · to to avente un pH di circa 4,0· ····* • · · * * 25· Procedimento secondo la rivendicazione 24, caratterizzato dal fatto che, nel caso della sostan za-tampone impiegata nella fase A), si tratta di acetato di sodio 1 Vi/acido acetico e il gradiente di n-propanolo sale da 0 a 40% (v/v), caratterizzato dal fatto che, nel caso della sostanza-tampone impiegata nella fase b), si tratta di acetato di sodio 0,1 M e il gradiente di n-propanolo diminuisce da 72,5% a 50% (v/v) e caratterizzato dal fatto che, nel caso della sostanza-tampone impiegata nella fase C), si tratta di piridina 1 M/acido formico 2 M e viene regolato un gradiente di n-propanolo che sale da 20% a 40% (v/v). 26· Procedimento secondo la rivendicazione 25, caratterizzato dal fatto che le frazioni determinate, attribuite ai picchi principali ben marcati, ven- 58 gono raccolte, il n-propanolo viene allontanato mediante estrazione con n-esano e, prima della fase C) tracce di n-esano vengono allontanate dalla fase ac- .... ·· · · quosa· ···· I·.. ··.. · 27· Prodotto medicinale a base di un Interferon ; • ♦ · · · 4 • · ♦ · · · · * . ···♦·· 4« omogeneo secondo una delle rivendicazioni da 1 a 12. ···· ···:«... ,··· .·· 28« Prodotto antivirale a base di un Interferon · · • * · · . . * · · · t ..... omogeneo secondo una delle rivendicazioni da 1 a 12. ···, ***** ·*·· •4 * · · · 29. Prodotto antitumorale a base di un Interferoni,;.. ···· ····. omogeneo secondo una delle rivendicazioni da 1 a 12...... 30. Prodotto che inibisce la crescita a base di un Interferon omogeneo secondo una delle rivendicazioni da 1 a 12. 31. Prodotto immunosoppressivo a base di un Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 · 32. Impiego di un Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 nella terapia oppure nella profilassi di malattie. 33. Impiego di un Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 nella terapia oppure nella profilassi di infezioni virali, 34. Impiego di un Interferon omogeneo secondo una delle rivendicazioni da 1 a 12 nella terapia oppure nella profilassi di tumori / 4927/COP/vr/ . V'-— ,: «/ Rugante ,essin«oj Ì1Ì2 Ul lS ING. BARZANÒ' ZANARDO S.p.A.
Independent claims7
921 paragraphs in 40 sections, as filed
TITLE
PURIFIED PROTEINS AND PROCEDURE FOR THEIR PREPARATION.
INV. DES
SIDNEY PESTKA MEN4CHEM RUBINSTF1N
PRIORITY JS4. The DOM. PPEV. N. 963257 OF 24 NOVEMBER 197P DOM. BREV. N. 62374 TEL 31 JULY 197P DOM. SPEV. No. 77710 OF SEPTEMBER 21, 1979
Rome, them ........................
<img file="IT1127253B_D0001.tif" />
Chicca - T ivuli
RAN 4100/12
00121 - 322 '· z
Register A
Protocol No. 27524 A / 79
MINISTRY OF TRADE INDUSTRY AND CRAFTS
Of Provincial Office for Industry, Commerce and Crafts of Milan} · (DIΑ OF I. AIRCRAFT! DEPOSIT FOR PATENT OF INVENTION
The year 1979 on the twenty-third day of! November at ie hours // and minutes // et City
I. · litJFFl. ANL-LA ROCHE ώ Cu. AKaIEììGìZSIìLLSCIIAF'T<sub>J</sub>,, with headquarters of Swiss nationality in BASEL SA'IZZERA
V ii by mandate ine · BARZANÒ '& ZANARDO SP and electively domici! Iat for the purposes of the law in Milan - Via Borgonuovo I with> 1 mandate submitted to me:
- Stamp application for the grant of a patent for industrial invention with Τ IT OL Ο I
Purified proteins and process for their preparation
Inventori designated £ · Sidney Pestka ~ Menachem Rubinstein
Priority of the patent application in: USAK 963-257 of 24 November 1978 N. 62.374 of 31 July 1979 li. 77.710 of September 21, 1979
MAIN
KffsiFaaCTira
StWJ & ìyibftt & eaifty & ft-x steatite cflncsattxpt (question no.
accompanied by:
- Description m duplo of n. 5th pages of writing.
- iltsEignL'ixaifalKiii-xxxxxxxaoilaptc.
- lshbssììkuhiW »- Declaration of reference to the power of attorney.
- Priority document and Italian translation (reserve)
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Ke ^^<sup>FFJC</sup>
<img file="IT1127253B_D0002.tif" />
(Salvatore Rav the officer in the Uiiic ^ (OclìllD T ^ uìso J
<img file="IT1127253B_D0003.tif" />
INDUSTRY, COMMERCE AND CRAFTS MINISTRY
Central Patent Office j
THE
ROME ;
!
F
Subject: 0orna «Italian patent nuts N ° 27524A / 79 |
Filed on November 1, 1979 on behalf of: F. HOFFMANN-LA ROCHE
AKTIENGESELLSCHAFT
REQUEST FOR AUTHENTIC COPIES
<img file="IT1127253B_D0004.tif" />
Please contact the Office with a prompt request to issue an authentic copy of the description and the report filing the Italian patent application in question. _________
Thanking with respect.
You authorize ...... Mr. G. Trabalzini and / or Mr.
Mint to the withdrawal of the authentic copies.
APPOINTED AGENTS:
3, Zenordo - R. Garavaglia - R. Appoloili, «L Qe Cedi - A.Zanella - R, Coletti to and for»
RAN 4100/12
Ing. Barzanò & Zanardo
DESCRIPTION of the industrial invention entitled: ....
• « ·· · · . · « ♦ * »
Purified proteins and processes for pre ·· · work.
paration ";
of the company F. HOFFMANN-LA ROCHE & CO. Aktienge • * · * sellschaft, of Swiss nationality, with headquarters m Ba- · ..:.
• «silea (Switzerland) '* ···,
Designated inventors: Sidney Pestka and Menachem Rubin-f.;.
stein .....
5 21 A / 79 filed on 23 NOV, 1979 <sup>N</sup>’
SUMMARY
Homogeneous proteins with a molecular weight greater than 12,000, such as Interferon, and processes for their purification characterized by the fact that it is an aqueous solution of such a protein, in the unpurified state, with a column balanced with a buffer substance at base of a Si0 matrix<sub>2</sub> porous, modified under HPLC conditions and the adsorbed protein is eluted with an increasing or decreasing gradient of a solvent miscible with water.
DESCRIPTION
Protein purification has long been a problem in peptide chemistry. The techniques adopted for this purpose - Ing. Barzanò & Zanardo include precipitation, gel filtration, exchange chromatography io -., ..
• to * · «* nico, gel electrophoresis, af-7 chromatography · * · ** ....
• * * · to '«· · · · finality and many other techniques. Methods for the i **: ΐ • ·· «« • · · · · · · · · · · · · · · · · · · · · · · ction of proteins of molecular weight which are found in. nature, which are present in a mate- ·; '· *, *; Biological rhefe in extremely low concentrations, * · ... ·. ·· .. * · '* «·· • · · · · • ····· comprise a plurality of the above procedures - I. '. I to ··· ♦ · indicated. In many cases it is necessary to .....
tenders and extraordinarily high quantities of raw material must be treated taking into consideration the significant losses that occur throughout the process. As a result, the purification processes for these proteins are extremely demanding and expensive. A good example of this is the various proofs of the isolation and characterization of Interferon. Since its discovery by Isaacs and
Lindenmann in the year 1957, 1'Inferferon, obtained from a
leukocytes and also from fibroplasts, has successfully resisted over the course of two decades to tests by researchers all over the world, which have been carried out in order to isolate it in the form of a homogeneous peptide in such quantities that allowed a characterization and a determination of its Proing. Barzanò & Zanardo
- 3 specific biological and chemical properties.
US patent 3,699,222, which has for ....
• «··· * * object of the first works of Isaacs and Lindenmann re- · ···· • * ·· * • * · · · · · • ♦ · · looking at Interferon, the purification of the so-;
* · · · ·> »Active room consists only of a precipitous;;" "L *. ί ....; ...
• · * * · · * tion with ammonium sulphate and in a subsequent dia -.;, · • · · · • «* * · * lysis. Since such a process is relatively ····.
- · · » · »
- ··· «• · · · · * * non-specific, the product obtained is still extraordinary - ···· ····.
impure. ···· '
A process consisting of several Bases for purifying InterPeron is described in U.S. Patent 3,414,651, which includes the following steps: selective adsorption on amorphous auninium silicate, elution with iodine solution or with thiocyanate solution, further precipitation of unwanted proteins with hydrochloric acid aqueous solution and with caustic soda aqueous solution, precipitation of Interferon with water-miscible solvents such as methanol, ethanol or acetone and subsequent chromatography of Interferon dissolved again on an ion exchange resin such as for example 2-diethylaminoethyl-cellulose. By means of this purification process, the specific activity of Interferon is raised by a factor of 6000. As specific Interferon - 4 - Ing. Barzanò If Zanardo have indicated the Interferon of chicks and 1 * Interferon of monkeys in the United States patent. ....
• · ··««
A further purification method is de- / * · * · ** ....
. ·;: * Written in U.S. Patent 3,975-344, according to * ϊ * · · · 4 4
4 · 4 4 + >
which a solution of Interferon of fibrophsti;
"·· '*: · ni nói purified was purified by ultra- * ^ ·' ί *,; ·. . 4 «* · · * density gradient centrifugation. It has been in- * · ../. * ', · * *****. ·· * ·.
said that, according to this method, we get an / *.
* * * * 4 yield and a degree of purity higher than those which are obtained according to the method in which column chromatography on Sephadex G-iOO is adopted.
The publications indicated below also concern the purification and the tested characterization of Interferons
Knight, E., Proc. Nati. Acad, Sci. USA 73, 520-3 (1976); TbrmS, ET et al., J. Biol. Chem. 251, 4810-6 (1976);
Brìdgen, PJ et al., J. Biol. Chem. 252, 6585-7 (1977); DeMaeyer-Guìgnard, J. et al., Nature 271, 622-5 (1978): Kawakita, M. et al., J. Biol. Chem. : 253., 598-602 (1978); Berthold, W. et al., J. Biol. Chem. : 253., 5206-11 (1978); Jankowski, WJ et al., J. Virology 16, 1124-30 (1975);
Davey MW et al., J. Biol. Chem. 251, 7620-5 (1976);
Chadha, KC et al., Biochemistry 17, 196-200 (1978).
Although in numerous of the aforementioned publications it is stated that mouse Interferon or human Interferon can be purified up to homogeneity, one of the classic tests of the homogeneity of proteins is not indicated, nor are they described - 5 - Ing. Barzanò Se Zanardo te the properties of the tasks presumed pure.
The use of liquid phase chromatography at ....
• · ··· * high pressure (HPLC) for the purification of pro- 7 ·· '' ...
• ♦ * * • 'e · »teine is generally known in the specialist sector, · • · * ·« »***** <sub>t</sub> in which the chromate- Υ · * '* L * is described in particular.
* ion exchange spelling and exclusion chromatography <* *.
* · · •. · · Sion / see for example Regnier, FE and others, J. '· .. · *. **, · - «...
• · ···
Chromatog. Sci. 14, 316-20 (1976) and Chang, S.-H. and ΣΛ • · others, Anal. Chem. 48, 1839-45 (1976) 7 · ♦ ····
In inverted phase chromatography, for example, Lichrosorb RP-18 (columns based on octadecyl-modified SiO ^) has been used successfully for the purification of peptides, such as for example the β-endor fina f ~ see for example Rubinstein, M. e airi, Proc.
Natl. Acad. Sci., USA 74, 4969-72 (1 977) J
Lastly, the partial characterization of three species of Interferon obtained from Ehrlich ascites tumor cells of mice (PM «33.000, 26.000 and 20.000) by Cabrer, B. and others has been described.
J. Biol. Chem. 254, 3681-4 (1979).
In the broadest sense, the present invention relates to an improved process for the purification of proteins having a molecular weight greater than about 12,000 with a high dissolution and with good yields on a preparatory scale. The procedure - 6 - Ing. Barzanò & Zanardo to is characterized in that an aqueous solution of the impure protein is passed through a column, balanced with a buffer substance, //// *. ·· * * based on a SiC matrix><sub>2</sub> porous modified with.; ·· * groups of cyanpropyl, cyclohexyl, phenyl, di. *
Octyl, octadecyl or glycerine in condi- * »...
HPLC, wherein the protein is first absorbed and then eluted with an increasing or decreasing degree of a minor solvent;
• accessible with water so that said protein, in the end, is obtained, in certain fractions of the eluate, in a purer form. These columns, which can be used one after the other and in different conditions with regard to pH and organic solvents, offer the possibility of purifying up to homogeneity proteins found in the natural material in extremely small quantities.
In a preferred embodiment, the present invention relates to a process for purifying Interferon up to homogeneity and, in particular, in quantities which are sufficient to allow, for the first time, a chemical characterization of this important medicinal substance.
The possibility of chemically characterizing Interferon represents a remarkable progress in the
<img file="IT1127253B_D0005.tif" />
- 7 - Ing. Barzanò & Zanardo development of this substance, since this constitutes a premise for synthesizing the substance, both by means of the synthesis of traditional peptides, and by adopting * · .. · * • · * • 4 4 4 · I use the method of manipulating genes with the use of suitable organisms, preferably to fight against them ;;
4 4 4 4
The proceeding is in accordance with this invention. ”·. ··: · ···.
tion, for the preparation of Interferon in the form. . · «
• 4 · 4 of a unitary protein is characterized by the fact ····;
• 4 that: 77;
4 4 4 *
A) an aqueous solution of Interferon in the non-pure state is passed, under HPLC conditions, through a column balanced with a buffer substance, based on a SiO ^ matrix modified with octyl groups, wherein 1 * Interferon it is first adsorbed and then eluted with an increasing gradient of a solvent miscible with water in a buffer substance, so that it is »
obtained, in certain fractions of the eluate, in a purer form;
B) these determined fractions obtained in step A) are passed through a column, balanced with a buffer substance, based on a Si0 matrix<sub>2</sub> modified with glyceryl groups, wherein Interferon is first adsorbed and then eluted with a gradient • 44
4 4 ««
- 8 - Ing. Barzanò & Zanardo descending of a solvent miscible with water into a buffer substance, so that it is obtained, in well-marked main peaks, in certain fractions of the eluate in more form pure;
C) these fractions obtained from step B) which correspond to the clearly marked main peaks, under HPLC conditions are passed through a column, balanced with a buffer-base, based on a modified SiO ^ matrix ** '' :
<td> · · • · · is · a · · ♦ · * · ♦ · ·· • •</td><td>• ·· « • • • «to to to · toto "</td>
<td></td><td> • ·</td>
<td>• · · · to : ·</td><td>• to · "·· *</td>
<td>• · · · to</td><td></td>
<td></td><td> * ·</td>
<td></td><td>to</td>
<td> ···’</td><td><sub>to</sub> · ·</td>
<td>to ·</td><td></td>
<td> ··..</td><td> • ·</td>
<td></td><td> • · ♦</td>
<td> • «</td><td> *·>·</td>
<td>to ·</td><td> ···</td>
<td>• to · *</td><td> • .·</td>
<td>in...:</td><td> • · · .·</td>
<td></td><td> • ···</td>
<td> .. ·</td><td>• • to</td>
<td>to ·</td><td> • ·· ·</td>
with octyl groups, wherein Interferon is first adsorbed and then eluted with a mixture of a water-miscible solvent and a buffer substance in an aqueous solution, so that it is obtained in a single, clearly marked peak, in certain fractions of the eluate in the form of a homogeneous protein and, possibly, step C) is repeated for the purpose of obtaining an extremely high degree of purity of the product.
The present invention also relates to the homogeneous species of Interferon obtainable according to a process according to the present invention.
Columns for HPLC based on a porous SiO matrix modified with octyl groups or
C with glyceryl groups (particle diameter:
micron; average pore diameter: 100 X), which
- 9 - Ing. Barzanò & Zanardo are used in the realization of the present invention, they are commercial articles, obtainable for example from em Laboratories of Elmsford, NY% „. ·
USA, under the trade name Lichrosorb .. ···
.....
• ·
RP-8 and Lichrosorb-Diol. Columns of porous SiO modified · · ;; · · '* .....:, * “* dificified with equivalent octyl groups (indicated ··.
,··· · ·· • · " ·· · to *
Chromegabond C-8) are obtainable from ES Industries ^ ·. ·>
Marlton, NJ, USA). · .... * '// aa * aaaaaaa
A suitable system for HPLC, in which the above columns can be used, is described in U.S. Pat. No. 4,116,046.
In carrying out the process according to the present invention, the solution of the impure peptide, of high molecular weight, preferably in the presence of a buffer substance at a pH suitable for the protein in question, is passed through the SiO2 column. Normally, this is done under pressure preferably in the pressure range of about 50 psi to 5000 psi (3.4-340 atmospheres). The protein adsorbed on the filling of the column is then eluted gradually and selectively using a gradient of a solvent miscible with water. Suitable solvents for this purpose are for example alkanols such as n-propanol, 2-propanol, ethanol, meBarzanò & Zanardo - 10 - Ing. Tanolo, tert.butanol or cyclic ethers such as dioxane. The fractionation of the eluate is carried out ··· »in a manner known to itself, determining the content of the - .. · '····· the individual active protein fractions by applying Z ...
* · 4 * «· • 4 4 4 4 very sensitive control jars. A system a- ζ, · / ♦ ·· · 4 «*« 4444 suitable for this purpose is described by Bohlen and "" · * *;;
others, Anal. Biochem. 67, 438 (i975). It is also rac-. , · * · * ·.
- *. · ·.. • •.. <. · Can be controlled to check the presence of the protein * ··
4 «*« · «• 4 4 4 4 4 desired by means of a suitable biological test.
«... *
The decision of which of the two types of column to use (column for normal distribution chromatography or column for invaded phase chromatography) and in which order of succession to use the columns, depends largely on the nature of the protein to be purified. The Applicant has found that, for example, in the particular case of human leukocyte Interferon, the best results are obtained when passing the impure Interferon solution first through a column based on a SiO matrix<sub>2</sub> modified with octyl groups (reverse phase chromatography) using a buffer substance having a pH of about 7.5 (preferably sodium acetate / acetic acid 1 M) and elution is carried out with an increasing gradient of n-propanol, then the active fractions are passed through 11 - Ing. Barzanò & Zanardo collected through a column based on a SiO_ matrix modified with glyceryl groups in, ··· *, · · · · · <sup>/</sup> · A 0.1 Me sodium acetate buffer substance si ·· ;;;
• · · · · · ·· ·. Performs elution with a decreasing gradient ···· • * * · * to ·
·.·,· .....
of n-propanol and, lastly, the com- ments are passed. · .... ···· - totally to ♦. ··. :
ponenti de 11 'Interferon separated on a column at * ··· ,,.
• .* · · · · • * · · <sub>φ</sub>· Base of a SiO matrix<sub>?</sub> modified with groups ·· * ·· ····· ....
* «· · ♦ · octyl, using a buffer substance having a * ·· *. pH of about 4.0, preferably pyridine 1 M / formic acid 2 M and elution is carried out with an increasing gradient of n-propanol. In this way, each of the three Interferons of separate human leukocytes (α, β and γ) can be further separated, obtaining, in the chromatogram, peaks clearly separated from each other, which represent the homogeneous proteins. By means of the global purification process, which begins with the incubation medium until chromatography on the second Si0 matrix<sub>2</sub> modified with octyl groups, an increase in the degree of purity of the factor 60.000 up to 60.000 is obtained
In a special embodiment of the process for the purification of Interferon of human leukocytes, the fractions obtained in phase Β), which correspond to the main peaks, are pu-12- Ing. Barzanò & Zanardo rectified, are extracted with n-hexane pa? remove the n-prqanol and are freed from traces of n-hexane. * *·, • · · · before carrying out step C). · · · * ;;
• Ϊ ··· • · · ·
Interferon species of human leukocytes o-; ·
·. ·. ··· · · homogeneous according to the present invention are characterized by a net peak on the columns for HPLC ···. .
•. · · * * · · * · * Previously indicated and also by a single band j ϊ · '* · * ·' «« · · · narrow in the electrophoresis on polyacrylamide gel ····;
***** on sodium dodecyl sulphate (NaDodSO ^) in the presence of 2-mercapto-ethanol. The extraction of the gei provided a single net peak of antiviral activity, which agreed with the protein band. The specific activities of pure Interferon species are located in the range of about 2.6-4.0 x 10 units / roj with MDBK (epithelial oxen kidney cells) cells and in the range of 1.5 - 4 x 10 units / mj with the Ag 1732 human cell line. The molecular weights are between about 16,000 and 21,000 (see Table 4, page 1¾). The results of the amino acid analysis are collected in Table 5 (page ^ i).
Interferons have antiviral, antitumor, growth inhibition and immunosuppressive activity. These activities can be determined even on a clinical scale, in the administration of 1-10 x io<sup>6</sup> units / day with relatively prepared
- 13 - Ing. Barzanò & Zanardo impure, which contain less than 1 / of human Interferon.
The homogeneous, purified species of Interferon of the present invention can be used in a way.
··· «· * ·· ·« · ·· * • j · ♦ · * · same as i. already known Interferon preparations, a- **:;
• · ♦ · and • · · · · · dictating the dosage to the degree of purity achieved, ·. ♦, ··· ·<sub>Λ</sub>· ····; ·.
Individual species of Interferon can come som **! · · · •. · · · Ministrate individually or in a mixture of lohQ,. · • · · »♦
,. ***; ·.··
Such mixtures can be obtained by mi-.··.
* · Selection of the isolated species or by interrupting the purification process at a phase in which several species of Interferon are present, however there are no Interferon-inactive proteins.
The purification process according to the present invention, although exemplified only on Interferon of human leukocytes, can also be carried out for the purification of other Interferons, for example of Interferon of human fibrqiasts and of Interferon obtained from animated sources and also for the purification of others proteins having a molecular weight greater than 12,000.
Thus, for example, the pro-Opiocortin (about 30,000 PM) was purified up to homogeneity by adopting the procedure according to the present invention / see Kimura et al., Proc. Nati. Acad.
Ing. Barzanò & Zanardo
Sci. USA 76, 1756-9 (1969) 7 · Measures which are suitable for adopting the procedure in accordance with the ....
* · * · · · Feels invention in an optimal way for purification · / ,, ....
- ··· * ·: »« toto · • to · · to other proteins are in the field of knowledge; ;<sub>M #</sub> • · · · · · • * · · · · specialist for those who are experts in the sector /: '· * ”····: ··., ····· **
The induction of Interferon production, · · · · · • »* * · · the first concentration and the fractionation of the * * ···· * ·. · * • · · · · • · · · · • ***** terferon, including filtration through a j ',; .. ··' ·· ••• to.
gels, can be made according to ***** * procedures
known per se. These steps of the process, which lead to obtain an aqueous solution of Interferon in the non-pure state, are not the subject of the present invention.
The process aspects and the product aspects of the present invention are illustrated by the following examples.
EXAMPLE 1
Homogeneous human leukocyte interferon from normal donors
A. Preparation of interferon
Interferon was prepared by human incubation for 6 hours of leukocytes / obtained from the blood of normal donors (10 cells / ml) with the pathogenic Newcastle virus (15 units of hemagglutinin / ml) in a minimum serum-free medium, which contained
Ing. Barzanò & Zanardo mg / ml of casein, an average Interferon titre of 5000 units / ml was obtained. · ····. · *! »» ·· * · ·· · tri, Pharmacology and Therapeutics A, 1977, 369-381; ···· ····· ·>
Wheelock, EP, J. Bacteriol. 92, 1415-1421 (1966)<sup>λ:</sup> - · ·.,. · J ·. * und Cantell, K. and others, Appi. Microbiol. 22, 625-625 * · ϊ * *. ;
•. * · · * • ee · · (1971) with some slight modifications. The titles of Inter - *** · ΓΛ.
• ·· ** and «· · a · feron were determined by performing an i ·? · Test. on the basis of the inhibition of the Cytopathic effect, ***** which could be carried out within a time period of 16 hours. All Interferon titers are indicated in / ™! Units, calibrated against the National Institute of Health (usa) reference standard for Interferon human leukocytes.
B. Concentration and first fractionation of Intaferon
Unless otherwise indicated, it was operated at a temperature of 0-4 ° C. After incubation was complete, the cells and cell fragments were separated by centrifugation (15 minutes, 500 xg). The casein was precipitated by acidification with HCl at pH 4.0.
After 2 hours, the mixture was centrifuged (10 minutes, 12000 xg) and the precipitate was discarded.
the overlying liquid (10 liters) was regulated up to a content of 1.5% (w / v) of trichloric acid - 16 - Ing. Barzanò & Zanardo acetic acid. After one hour, the precipitate was centrifuged (10 minutes, 12000 xg) and was new.
• 4 4 · dissolved in 50 ml of 0.1 M NaHCO. After addition of 0.5 g of Triton X-100 and 1.5 g of * 1 ;;. mi of acetic acid ... · ·· • · · · · 4 4
V. ** · * * (drop by drop under stirring) the mixture was' / ...
. ···. ·· * • * · 4 stored for 1 hour at 0 ° C and then for 16 '··· ·. ·. · · · · * * · · ·. . ··. ··. · Hours at -20 ° C. After thawing it was centrifuged for, ..; ····. ···· .. ·. »· Minutes with 17.000 x g. The residue was discarded - ····;
.....
to and the overlying liquid was adjusted to a 4% trichloroacetic acid content. After 1 hour, the mixture was centrifuged for 10 minutes with
12000 xge the precipitate was dissolved in 5 ml of 0.5 M NaHCO.
C. Filtration through gel
The obtained concentrated Interferon solution was treated with 1.5 g of urea and sent on a column of Sephadex G-100 fine (2.6 x 90 cm), pre-balanced with 4 M urea / sodium acetate buffer 0.1 M. The column was eluted at room temperature and adopting a flow rate of 0.5 ml / minute with 4 M urea / 0.1 M sodium acetate, pH 7.5.
Fractions of 12.5 ml were collected. The Inter-feron activity was eluted in fractions 19-23.
D. HPLC
The combined fractions 19-23 obtained from the column
Ing · Barzanò & Zanardo of Sephadex G-1OO were sent directly, via the pump, on a column of Lichrosorb RP-8. · ..
• tt · · * tttt tttt tt (10 microns, 4.6 x 250 mm). The column was pre *******. ···· ♦ · * · · · * · 'tttt ·· / ··· ·
-balanced with a 1 M sodium acetate buffer (pH: ***** • ♦ · · · · • tttttttt 0 0
7.5), which contained 0.01% (v / v) of thiodiglycol and: · ·· '·· • ** ·. .. ·· * ** was eluted with a linear gradient of n-propanol · !. *. ;
• · * · · · · in the same buffer / 1 hour, 0-20%; 3 hours, 20-40% ····, **. ** · ♦ * ·. * · (V / v) _ / adopting a flow rate of 0.25 ml / mjt,;,. **** nuto. 0.75 ml fractions were collected. Inter · ® ···· * feron was eluted in the fractions 23-40 / 25-30% (v / v) of n-propanol 7 ·
Fractions 27-33, which contained most of the activity of Inte'rferon, were combined, treated with n-propemol up to a final concentration of 80% (v / v) and were sent directly via the pump on a column of Lichrosorb-Diol (10 microns, 4.6 x 250 mm), which was pre-balanced with a 0.1 M sodium acetate solution having a tin content of 80% (v / v) of n-propanol. The column was then eluted for hours with a linear gradient of 72-50% (v / v) of n-propanol in 0.1 M sodium acetate adopting a flow rate of 0.25 ml / minute. 0.75 ml fractions were collected. The Interferon activity was eluted in the form of three main net peaks,
Ing. Barzanò & Zanardo which varied, quantitatively, from prepared to prepared. These peaks have been indicated by α, β and \ *** · · · * * γ in the order of their elution sequence »*, *. ·· * ·· ·· · • 4
The α-fraction was eluted at a ···! ! *** • · · · 4 4
44444 4 <sub>φ</sub> 4 <sub>φ</sub> 4 4 4 4 68% concentration of n-propanol, the β-fraction ····: * · ..
..·· *··* 4 4 <sub>is</sub> was eluted at a concentrate. "! ;
· ·. · 66 · 66.5% n-propanol and the γ-fraction was ...! **. · ******* 4 4 4 4 4 4 eluted at a concentration of ***** • · · · ·
65.5% n-propanol. The overall yield in Interferon activity was greater than 80%.
The fractions belonging to each peak were brought together and were further purified in subsequent stages. Since peak Ύ was certainly the largest and appeared best separated from the other components, it was chosen for further purification. The fractions 54-56 of the diol column, which contained the γ peak, were combined and the n-propanol was removed by two extractions with equal amounts of hexane.
Traces of hexane were removed under a stream of nitrogen. Pyridine and formic acid were added up to the final concentration of 1 M or 2 M and the solution was sent on a column of Lichrosorb RP-8 (10 microns; 4.6 x 250 mm), pre-balanced with pyridine 1 M and with formic acid
Ing. Barzanò & Zanardo
M (pH 4.0). The column was eluted for 3 hours. · ♦ · with a linear gradient of n-propanol (20-40%) in * · ... · • ·· • · ♦ · · pyridine buffer 1 M / formate adopting a flow rate .. ·; ·:
flow rate of 0.2 ml / minute. 0.6 ml fractions collected ;;; * The main peak of the concor activity - ** 'i ·· ·.
gave with a spike of protein. Fractions 45 and 46. . • • · «(32% (v / v) of propanol) which corresponded to this · * ·· • · ·« «peak, were reunited and were again ,,,, · • aa · chromatographed in equal conditions. Interferon • »»
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• · .· • · ·
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it was eluted in the fraction 31 (32% (v / v) of propanol). The specific activity of this fraction was calculated at 4 x 10 units / wg in comparison with ox serum albumin. This material was used for further characterization. The fluorescence patterns of the HPLC analyzes were so well reproducible that they provided a constant feature of the whole process *
The results of the purification are collected in Table 1. All the purification, starting from the incubation medium up to the second column of RP-8 ', was of a factor 6O.OOO-8O.OOO. The cumulative yield of phase 1 up to the diol phase was 30-50% / ·
After this phase, each of the three Interferon peaks was further purified separately
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<td>• H</td><td>ε</td><td>former</td><td>you</td><td></td>
<td>cn</td><td>ρ</td><td></td><td>d</td><td></td>
<td></td><td>φ</td><td>re</td><td>P</td><td></td>
<td>Φ</td><td>P</td><td>Ό</td><td>P</td><td></td>
<td>d</td><td>Φ</td><td>Φ</td><td>Φ</td><td></td>
<td>or</td><td>* d</td><td> ></td><td>cu</td><td></td>
<td></td><td></td><td></td><td>CU</td><td></td>
<td>ta</td><td>you</td><td></td><td>Φ ·</td><td></td>
<td>you</td><td>P</td><td>tn</td><td>or</td><td></td>
<td>you</td><td>you</td><td>IS</td><td>tì P</td><td></td>
CM P \ P (0 cn 'to' m £ (CJ p ρ · Η
P -UJ · Η tfl ε tn dd φ Φ d Ο Φ uro ο Φ
<td></td><td>OR</td><td>t-</td><td>* d</td>
<td>d *</td><td>r-</td><td></td><td></td>
<td>• ri «5</td><td>X</td><td>Φ</td><td>d</td>
<td>P</td><td>T</td><td>tn</td><td>or</td>
<td>tì d</td><td>THE</td><td>you</td><td>d</td>
<td>x »ro</td><td>CM</td><td>cu</td><td></td>
<td>do</td><td></td><td></td><td> ((</td>
<td>is! cn</td><td> «</td><td>you</td><td></td>
<td>Φ tn</td><td>you</td><td>ro</td><td>Cl</td>
<td>P tì</td><td>Φ</td><td></td><td>s</td>
<td>d</td><td></td><td> •</td><td></td>
<td>Or tì</td><td>k</td><td> 00</td><td> •</td>
<td>u υ</td><td>or</td><td></td><td>•re</td>
<td>•re</td><td>t-</td><td>φ</td><td>P</td>
<td>tì <u</td><td></td><td> 53</td><td>you</td>
<td>d -ri</td><td>Φ</td><td>you</td><td>you</td>
<td>• Η υ</td><td>tn</td><td>cu</td><td>you</td>
<td>φ Φ</td><td>you</td><td></td><td>former.</td>
<td colspan="2">P fx Cu</td><td>you</td><td>Φ</td>
<td>or cn</td><td></td><td></td><td>you</td>
<td>ίχχο</td><td>you ro</td><td></td><td>fX</td>
<td>P</td><td>ro</td><td>* d</td><td>•re</td>
<td>tì -ri</td><td>Φ</td><td></td><td>tn</td>
<td>ro></td><td>Ό</td><td>or</td><td>you</td>
<td>ro ro</td><td></td><td>P</td><td>φ</td>
<td>Φ P</td><td>OR</td><td>d</td><td> ></td>
<td>• dp</td><td>Φ</td><td>d</td><td>•re</td>
<td>you</td><td>d</td><td>φ</td><td>TO</td>
<td>φ -</td><td>Φ</td><td>P</td><td></td>
<td>d ro</td><td>Ct)</td><td>P</td><td>• rt</td>
<td> 0</td><td>or</td><td>or</td><td>TO</td>
<td>• H ·</td><td>ε</td><td></td><td></td>
<td>ta * d</td><td>or</td><td> >~</td><td>or></td>
<td>tì tì</td><td></td><td></td><td></td>
<td>d <3</td><td>or</td><td>or</td><td>Φ</td>
<td>• ri * d</td><td>u</td><td>u</td><td>tn</td>
<td>E: 5</td><td>u</td><td>u</td><td>you</td>
<td>tì tì</td><td>•re</td><td>* H</td><td>cu</td>
<td>Φ P</td><td>former</td><td>former</td><td></td>
<td>p tn</td><td></td><td></td><td>you</td>
<td>Φ</td><td>ro</td><td>ro</td><td>ro</td>
<td>d Φ</td><td>Φ</td><td>• rd</td><td>ro</td>
<td>ε</td><td>* d</td><td></td><td>you</td>
<td>tì 0</td><td></td><td>d</td><td>το</td>
<td>ro u</td><td>re</td><td>or</td><td></td>
<td></td><td>Ό</td><td>u</td><td>OR</td>
<td>tì Φ</td><td>•re</td><td></td><td>P</td>
<td>φ d</td><td>u</td><td>you</td><td>d</td>
<td>Pi rQ</td><td>you</td><td>P</td><td>d</td>
Ing. Barzanò & Zanardo
E, Electrophoresis of polyacrylamide gel
Samples of Interferon (1.5 x 10<sup>J</sup> units) have been ^ ** · · * · * · * · · * * · * you have incubated with NaDodSO. and with 2- '·' ···. ζ ...
• ♦
-mercapto-ethanol and have been applied on a gel .... i; *** ·· ♦ · ♦ * · • · · · · k «·; ·· ♦ ·· for plates. After electrophoresis, after coloring - ···· .: »...
,··· .··* • · · <sub>ee</sub> with Coomassie blue, a single ** i • 4 «« · • 9 9 * «· net band was obtained. The apparent molecular weight was de · »...;
«« * · ** · • J · «· k ended obtaining a value of 17500 (in comparison · * · *:
• 9 9 9 <sub>#</sub>
4M · * with standard proteins). The gel was cut into 1 mm strips, each strip was homogenized in 0.4 ml of 0.5 M NaHCO / 0.1% NaDodSO and was examined for Interferon activity. A single peak with antiviral activity was found, which agreed with the only protein band.
F. Analysis of_amino acids
Homogeneous human leukocyte Interferon amino acid analysis (peak Y) was performed with the Fluorescamin amino acid analyzer on samples of 0.5 - 1 micrograms of natural Interferon and Interferon S-carboxymethylate. For the determination of the cysteine / cystine ratio, the native Interferon was carboxymethylated and therefore was hydrolyzed in 6 M HCl if reducing conditions (0.1% of ticglycolic acid). In these conditions 22
Ing · Barzenò & Zanardo ni, cysteine is measured as S-carboxymethyl • · 4 4
4
-cysteine and cystine is measured as a cistern //.7.
.·/.’.. · · · · • · · · * <sup>* *</sup> free · The results of the analysis of amino acids are ·; ··· «4» 4 4 4 4 collected in Table2. The specific activity, cal- ;;;;; ·;
ζ * «444
44 4 < <sub>#</sub> poured on the amino acid content, was determined .... .... ·· * ·. · · · · · · mined with 2-4 x 10 unitV<sup>m</sup>9· .* *.*.’· • 4 4 · 4 * * <sup>4</sup> 4 4 4 4
TABLE 2 '*. *.' * '. ··. * ·.
4 · · 4 4
Interierón amino acid composition of human leukocytes_ *****
<td>amino acid</td><td>residues</td>
<td>asx</td><td> 15,2+1,2</td>
<td>thr *</td><td> 7,5+0,5</td>
<td>Ser *</td><td> 8,0+0,5</td>
<td>glx</td><td>2II, O + O, 6</td>
<td>Pro</td><td> 6,3+0,3</td>
<td>Gly</td><td> 5,5+0,5</td>
<td>Wing</td><td> 8,2+0,2</td>
<td>Cys (Total)</td><td> 3,3+0,7</td>
<td>1/2 CìstinÌ</td><td> 1,8+0,2</td>
<td>CxsteinÌ</td><td> 1,5+0,5</td>
<td>Val</td><td> 7,8+0,2</td>
<td>Met</td><td> 3,9+0,2</td>
<td>Ile</td><td> 8,9+0-,4</td>
<td>Leu</td><td> 21,8+1,3</td>
<td>Tyr</td><td> 5,1+0,2</td>
<td>Phe</td><td> 9,1+0,3</td>
<td>His</td><td> 3,3+0,4</td>
<td>Lys</td><td> 11,6+0,5</td>
<td>Arg</td><td> 7,3+0,5</td>
<td>Trp<sup>++</sup></td><td> 0,7+0,1</td>
* Corrected at time 0.
+ Measured after carboxymethylation of natural Interferon.
++ Measured after hydrolysis in 6 M HCl 4% thioglycolic acid.
- 23 - Ing »Barzanò & Zanardo
EXAMPLE 2
Homogeneous human leukocyte interferon from leukocytes * ···· '- - - -. - - - -, .4 • * 4 · 4 of patients with leukemia ^
Interferon was obtained by incubating ϊΐϊ • 4 4 4 4
Λ * .. »tion of human leukocytes, isolated from the. pa's blood ....
·· », patients with leukemia (heroic myelogenous leukemia,. · • 4 • 4 4 · nica, CML) by leukophoresis with pathogenic virus ····· • · * • 4
Newcastle in a medium containing casein, free of
4 · 4 * serum · The titers of Interferon were 5000-40 * 000 unitV<sup>1</sup>*<sup>1</sup>·
The purification procedure was the same as that described in Example 1 for Interferon from blood of normal donors and included selective precipitation by 0.9 M acetic acid in the presence of Triton X-100, gel filtration on Sephadex G-100 in 4 M urea, HPLC at pH 7.5 on Lichrosorb RP-8, HPLC on Lichrosorb-Diol and HPLC on Lichrosorb RP-8 at pH 4.0.
The fractions, which corresponded to the peaks α, β and γ of the Lichrosorb-Diol column, were collected and, therefore, were purified, separately from each other, in further treatment phases ·
From the joined fractions 43-46 (peak-α) the n-propanol was removed by two extractions with equal quantities of n-hexane. Traces of hexane have been
4 4 ··.
• 4 4*4
- 24 - Ing. Barzanò & Zanardo removed under a nitrogen current. 4 th pyridine and formic acid were added up to the final concentration of 1 M or 2 M and the solution was sent. ··; · i ...
··.. · • 4
4 4 4 4 lution on a column of Lichrosorb RP-8 (10 microns ^; ::;;
• 44 4 4 · » ·
J · »4 4 4
4.6 x 250 mm), which was pre-equi hovered with pyridine “ί ··., • * · Λ.
**♦· * :
Vi / formic acid 2 M (pH 4.0) * The column has been. . ··· * ··
4 4 4 «* 44 · 4 4 * then eluted for | 3 hours with a linear gradient of ..... * //. *« · · · 4 · · 4 4 4 4 n-propanol (20-40%, v / v) in a swab formate of
4 4 4 * 1 M pyridine adopting a flow rate of 0.2 ml / minute. 0.6 ml fractions were collected. The Interferon activity was eluted in large peaks at concentrations between 31% and 35% (v / v) of n-propanol. These fractions were brought together and were chromatographed again in equal conditions, the Interferon activity was eluted in 2 main peaks (o ^ and ct ^) at 41% and 32% (v / v) of n-propanol. Secondary components were eluted with a 34% (v / v) n-propanol concentration.
The combined 47-50 fractions (β peak) of the Lichrosorb-Diol column were treated equally and chromatographed on Lichrosorb RP-8 as was described for peak a. Interferon activity was eluted into two main peaks: β ^ a
32% (v / v) of n-propanol and β ^ to 34% (v / v) of n-ptopa
Ing. Barzanò Se Zanardo nolo · In this case, a new chromatography is not ....
is necessary. In some preparations it has been possible to highlight a peak β at 31% (v / v) of n-propa. ;; ϊ * ···· • · • · · · · freight · ·····,.
·. ··· *. . • * V 0 »»
The combined fractions 52-54 (peak'γ) of the column · '* ·.
,. ·! ·· ···. . Lichrosoib-Diol I have been treated equally. . * ***** • · * · · • ··· * t * * »· · · and have been chromatographed on Lichrosorb RP-8 as ····· .....
• «· · · * has been described for the peak at · Inter activity ....;
• ♦ · · · feron was eluted in five main peaks: at 31% of n-propanol, v / v), Y ^ (at 32% of n-propanol, v / v) γ (at 34% of n -propanol, v / v), Y (a
35% n-propanol, v / v) and (at 35.5% n-propanol, v / v) · In this case a new chromatography was not necessary.
The results of the purification for the preparation of the individual species of Interferon are collected in Table 3.,
The species a<sub>2</sub> and β ^ can also be differentiated by means of their elution characteristics on Lichrosorb-Diol: a<sub>2</sub> it is eluted with 68% n-propanol (v / v) and β is eluted with 66.5% n-pro panol (v / v).
Samples of the Interferon species (1.5 x 10 units) were incubated with NaDodSO ^ and with 2-mercapto-ethanol and were applied on a
Ing. Barzanò & Zanardo gel for plates. After electrophoresis, the peaks,, TP<sub>2</sub> » » <sup>Y</sup>2 <sup>is</sup> ^4 <sup>have</sup> respectively given a single band, while the peaks β, Y and Y have 3 3 b given respectively two bands. The apparent molecular weights were between 16,000 and 18,000 with the exception of β, which showed a white color at 16500 and ✓
a 21,000 band and with the exception of, which had a 21,000 band (see Table 4).
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<td>• T</td><td>CI</td><td>σι</td><td>m</td><td>CO</td><td>re</td><td>us</td><td>co</td><td>m</td><td>co</td>
<td></td><td></td><td>It goes</td><td>is"</td><td> 4.</td><td></td><td>u</td><td></td><td></td><td></td>
<td></td><td></td><td>(Ί</td><td>rd</td><td>CJ</td><td>m</td><td></td><td></td><td></td><td></td>
• · · · · · ·· »·, ··· I * · ···.
·..
···· - 27 - Ing. Barzanò & Zanardo
TABLE 3- Purification of Interferon of leukocytes from CML cells «3
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..... * . · · <sup>1</sup>
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<td colspan="2"></td><td>χ ιη</td><td colspan="3">ο. ο * rl</td>
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<td></td><td></td><td></td><td>φ</td><td>re*</td><td></td>
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<td></td><td></td><td> 3</td><td>(you</td><td> 3</td><td></td>
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<td></td><td></td><td>υ</td><td>• Η</td><td>ο</td><td></td>
<td></td><td></td><td>* τΗ</td><td>υ</td><td>• Η</td><td></td>
<td></td><td></td><td>Ρ</td><td></td><td>Ρ</td><td></td>
<td></td><td></td><td>φ</td><td></td><td>Φ</td><td></td>
<td></td><td></td><td>υ</td><td>Ο</td><td>Ο</td><td></td>
<td></td><td></td><td><ΰ</td><td>ο</td><td>(you</td><td></td>
<td></td><td></td><td>ο</td><td>Γ "</td><td>Ο</td><td></td>
<td></td><td></td><td>fc</td><td>THE</td><td>fc</td><td></td>
<td></td><td>Φ</td><td>ο</td><td>X</td><td>ο</td><td></td>
<td></td><td>P</td><td>γΊ</td><td></td><td>γ4</td><td></td>
<td></td><td>re</td><td>Ο</td><td>re</td><td>Ο</td><td></td>
<td></td><td> (3</td><td>• Η</td><td>ο</td><td>• Η</td><td></td>
<td></td><td>P</td><td>fc</td><td>Ρ</td><td>fc</td><td></td>
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<td>OR</td><td rowspan="3">re<sup>-</sup></td><td>•re</td><td>• Η</td><td>Ή</td><td> (0</td>
<td>ta</td><td>υ</td><td>re</td><td>Ο</td><td>χ</td>
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<td>Χ> (ti</td><td>n</td><td></td><td></td><td></td><td></td>
<td>fc u</td><td>fc</td><td></td><td></td><td></td><td></td>
<td>Ο -ri</td><td>or</td><td></td><td></td><td></td><td></td>
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<td>X (ti</td><td>XI</td><td>u</td><td>or</td><td>or</td><td>(you</td>
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<td>• J <sup>W </sup>l ~ (</td><td></td><td>(fc</td><td>ffc</td><td>(fc</td><td>EFC</td>
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<td>or</td><td>OR</td><td>or</td><td>or</td><td>or</td><td>or</td><td>m</td><td>in</td><td>LD</td>
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<img file="IT1127253B_D0013.tif" />
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- 30 - Ing. Barzanò & Zanardo
The analysis of amino acids from the fractions of Inter • · · · feron of purified human leukocytes was carried out with an amino acid analyzer. · * ****** • · ♦ * · ta · ·.
Pluorescamin on samples of 0.1-1 micrograms · The '' ;;; · • tttttttt: · drolysis was carried out in HC1 6N under conditions ··· *:
. ··· • tt * reducing agents (0.1% thioglycolic acid) · The results-, • · • tttt * ti of the analyzes are collected in Table 5 · ···· '
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Accuracy +1.5 of residue * Mixtures of entifaiib ^ * lè • · · · • · • · tt · · · • *.
Ing. Barzanò & Zanardo
Splitting trypsin and HPLC of the fragments
From time to time 300 pmol'i of the purified human leukocyte Interferon species were dissolved in aqueous sodium bicarbonate solution (50 millimoles, pH 8, 50 microliters). After addition of 0.1 micrograms of trypsin in 2 microliters of HCl (pH 3) from time to time, it was subjected to ♦ ··· »« ····· • · · · · · ··· • «· • * ·· • · »· * · • * ♦ * cubation for 14 hours at 37 ° C, treated with 5 ml - ** '* i · · · 9<sub>f</sub> * »· * * Croliters of acetic acid and the mixture was sent on a column of Lichrosorb RP-8 (particle diameter 10 microns; 4.6 x 250 mm). The column was eluted for one hour with a linear gradient of 0-40% (v / v) n-propanol in a 0.1 l / pyridine 0.13 m (pH 3) formic acid buffer with a flow rate of flow of 0.5 ml / minute.
The fragments were highlighted according to the fluorescamine method. The results are collected in Table 6, which indicates the position of the peak as a percentage of n-propanol and the relative size of the fragments (8 = small;
M = medium size; L = large):
- 33 - Ing. Barzanò & Zanardo
TABLE 6
Tryptic Interferon Peptides of Human Leukocytes //, · / *
<td></td><td>to ··* * ♦ »to tt</td>
<td>Species</td><td>Elution with% n-propanol • tt a :</td>
<td><sup>is</sup>1</td><td>3L<sub>t</sub> 4L, 4.2M, 11.5M, 12.55, 14.5M, 16S, 18M, 203, 21S, 22.55, 29M</td>
<td> «2</td><td>3L, 4L, 4.2M, 11.5M, 12.55, 14.5M, 165, 18M, </ ·</td>
<td></td><td>273, 29M ·····</td>
<td></td><td>3L, 4L, 4.2M, 11.5M, 12.5S, 14.5M, 16S, 17.5S, 18M, 29M '··· $</td>
<td> *3</td><td>3L, 4L, 4.2M, 4.5S, 10M, 12.5S, 14S, 14.5M, 163, 18L, 19.5M, 27M, 32M</td>
<td><sup>Y</sup>1</td><td>3L, 4L, 4.2M, 4.5S, 5S, 6.5S, 11.5S, 12.5S, 14.5M, 16S, 17.5M, 18M, 29M</td>
<td><sup>Y</sup>2</td><td>3L, 4L, 4.2M, 4.55, 5S, 11.5S, 12.5S, 14.5S, 163, 18L, 29M</td>
<td><sup>ύ</sup>3</td><td>3M, 4M, 4.2M, 11.5M, 12.5S, 13.5S, 14.5M, 163, 18L, 20S, 32M</td>
<td><sup>Y</sup>5</td><td>3L, 4L, 4.2M, 4.5M, 7S, 7.5S, 10S, 11.5L, 12.5S, 14S, 14.5M, 165, 18L, 24., 55, 25.5S, 32S</td>
. • • tttt tt * «· *« tttt «· ·
The Interferon species of purified human leukocytes were subjected to an analysis of amino sugars and an amino sugar in the range of 50-100 pmoles could be determined. In all cases, less than one residue of glucosamine, galactosamine or mannosamine was found for each molecule.
In most cases, a number of smaller peptides that have been eluted near the amino sugars are interfered with the analysis. Therefore it is possible that the peaks referring to amino • 4
- 34 - Ing * Barzanò & Zanardo sugars are to be attributed, in part or even totally, to peptides'.
··· • 44 4 «
Finally, a test to obtain in sequence in mo -.; *: * Lé of pure Interferon γ by means of a decomposition £
manual according to Edman, including a rehydrolysis
<img file="IT1127253B_D0016.tif" />
·* ·.
and an amino acid analysis using Z • · · · * na, did not provide amino acids in the first two cycles.
4
The treatment of 100 pmoli of Interferon of leucoci * -. '
4 4 4 * ti human pure with leucinaminopeptidase and with amino ^ tidase M during 20 hours at 37 ° C did not influence biological activity; Amino acids could not be detected in the incubation medium. By treating the liquid above an induction medium (leukotics and Neitcastle pathogenic virus in a minimum medium) with Cimminopeptidase M, it was not possible to observe a loss of Interferon activity, which indicates that the molecule of
Interferon already before the purification process contains a blocked amino acid equipped with terminal amino groups. For control, crude Interie ron, pure Interferon and the insulin β-chain were incubated together with aminopeptidase M. While insulin was partially degraded (demonstrable amino acids) there was no loss of activity by Interferone
Ing. Barzanò & Zanardo
EXAMPLE 3
Similarly to the procedure described in * E ******** example 1, ox leukocytes were stimulated for the "Z * j * ··! · · • * production of Interferon and Inter was purified; * ·
·.···· · · , <sub>K</sub> · · * ··· feron up to homogeneity in the form of a single ····· ·.,. ···. ·· • · · species of homogeneous proteins. * · ΊΛ • * · *
EXAMPLE 4 ..7. ': ··' · * · · · * · · · · · · «« «
Similarly to the process described in E- ····;
···♦.
• «· · · example 1 pig leukocytes were stimulated for the production of Interferon and the interferon was purified up to homogeneity in the form of a single species of homogeneous proteins.
EXAMPLE 5
Similarly to the procedure described in Example 1, sheep leukocytes were stimulated for the production of Interferon and Inter feron was purified until homogeneity in the form of a single species of homogeneous protein.
EXAMPLE 6
In analogy to the procedure described in Example 1, horse leukocytes were stimulated for the production of Interferon and Interferon was purified until homogeneity in the form of a single species of homogeneous proteins.
- 36 - Ing · Barzanò & Zanardo can <i leukocytes for the pro<sub>T</sub>Interferon "." The form of / single, species of '. ··· 4' 4 has been purified
EXAMPLE 7 • · · * 'In analogy to the procedure described in Example -. ,,, · pious 1 Interferon induction and until homogeneity under homogeneous proteins were stimulated ·
EXAMPLE 8 ..... <sub>tt</sub>* « · · 4 4
4 *44
In analogy to the procedure described in Exem - ****:
• 4 44 * pious 1 cat leukocytes were stimulated for the production of Interferon and Interferon was purified up to homogeneity in the form of a single species of homogeneous proteins,
EXAMPLE 9
In analogy to the procedure described in Example 1, monkey leukocytes were stimulated for the production of Interferon and Interferon was purified until homogeneity in the form of a single species of homogeneous proteins.
EXAMPLE 10 (a) 3 mg of homogeneous human leukocyte Interferon having a specific activity of 2 x 10 unitV ^ ig were dissolved in 25 ml of 5% normal human serum albumin · The solution was filtered through a filter for bacteriology and was divided into 100 aseptic vials Each vial con- 37 - Ing. Barzanò & Zanardo held 6 x 10<sup>6</sup> pure Interferon unit, which is suitable for parenteral administration. The vials / '** · • * * · ♦ · · are preserved, until use, prefer them- * ζ. · ··.:. : ··· cold (at -20 ° C).
4 4 • (a) Aqueous solution containing 1.5 mg of * *···;
. · »·. ·· * • * · 4 species of human leukocyte Interferon homogeneous • * 4 4 4« / ♦ /. »· · · · 4 * α, β. , Y and Y<sub>Q</sub> (each Tìcca in the relationship nspet - ..; ····
2 12 ·.·· 4* *44·
4 ·· »· to its natural frequency) with a speM ·· activity;
• · · 4 « <sub>Z</sub> 444 · * is about 2 x 10 units / mg and 100 mg of normal human serum albumin, is passed through a bacteriological filter and the solution is distributed under aseptic conditions uniformly in 100 ampoules. Each ampoule contains approximately 3 x 10 ^ units of pure human leukocyte Interferon and 1 mg of serum albumin. The vials, which contain Interferon suitable for parenteral administration, are suitably stored cold (-20 ° C).
Contents40
16 sheets
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Numbers
- Publication, DOCDB
- 1127253
- Publication, EPODOC
- IT1127253
- Application
- 2752479
- Application, DOCDB
- 2752479
- Application, EPODOC
- IT19790027524
Titles2
- Italian
- PROTEINE PURIFICATE E PROCEDIMENTO PER LA LORO PREPARAZIONE
- English
- PURIFIED PROTEINS AND PROCEDURE FOR THEIR PREPARATION
Classification
- CPC, 11
- C07K14/56
- C07K14/555
- C07K1/20
- C07K14/665
- Y10S530/83
- Y10S930/142
- Y10S435/811
- Y10S530/828
- A61P31/12
- A61P35/00
- A61P37/06
- IPC, 11
- A61K38 21
- C12P21 00
- A61P31 12
- A61P35 00
- A61P37 06
- C07K1 20
- C07K14 52
- C07K14 555
- C07K14 56
- C07K14 665
- C12R1 91
