DK2517556T3 - Fremgangsmåde til punkt-specifik rekombination, gnavere og gnaverceller i stand til at udtrykke kimære antistoffer eller kæder - Google Patents

Fremgangsmåde til punkt-specifik rekombination, gnavere og gnaverceller i stand til at udtrykke kimære antistoffer eller kæder Download PDF

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DK2517556T3
DK2517556T3 DK12171791.2T DK12171791T DK2517556T3 DK 2517556 T3 DK2517556 T3 DK 2517556T3 DK 12171791 T DK12171791 T DK 12171791T DK 2517556 T3 DK2517556 T3 DK 2517556T3
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human
region
rodent
dna
cell
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Allan Bradley
E-Chiang Lee
Qi Liang
Wei Wang
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Kymab Ltd
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Claims (30)

1. Fremgangsmåde til fremstilling af en gnaver i stand til at fremstille et repertoire af kimære antistoffer eller tunge antistofkæder, fremgangsmåden omfattende: at indsætte i et gnavercellegenom; (a) en flerhed af human IgH-V -regioner, en eller flere human D regioner og en eller flere human J-regioner opstrøms af en konstant region af værtsgnaveren; og (b) eventuelt en eller flere human Ig-letkæde-kappa-V-regioner og en eller flere human Ig-letkæde-kappa-J-regioner opstrøms af den konstante værtsgnaver-pattedyrs-kappa-region og/eller en eller flere human Ig-letkæde-lambda-V-regioner og en eller flere human Ig-letkæde-lambda-J-regioner opstrøms af den konstante værtsgnaver-pattedyrs-lambda-region; henholdsvis, hvor indsættelsen er således at gnaveren er i stand til at fremstille et repertoire af kimære antistoffer eller tunge antistofkæder med en konstant gnaverregion og en variabel humanregion, hvor trinnene (a) og (b), når begge er til stede, kan udføres i hvilken som helst rækkefølge, hvor, en eller flere indsættelseshændelser anvender punkt-specifik rekombination, hvor indsættelsesfremgangsmåden begynder ved et punkt, hvor en startkassette er blevet indsat i genomet af gnavercellen, såsom en ES-celle, og hvor indsættelsen af et første DNA-fragment i startkassetten efterfølges af indsættelse af et andet DNA-fragment i en del af det første DNA-fragment, og hvor indsættelsen af human-DNA'et foretages mellem den konstante gnaverregion og den sidste, 3', J-gnaverregion.
2. Fremgangsmåde til fremstilling af en gnaver i stand til at fremstille et repertoire af kimære antistoffer eller lette antistofkæder, fremgangsmåden omfattende at indsætte i et gnavercellegenom; (a) en flerhed af human Ig-letkæde-kappa-V-regioner og en eller flere human Ig-letkæde-kappa-J-regioner opstrøms af den konstante værtsgnaver-kappa-region og/eller en flerhed af human Ig-letkæde- lambda-V-regioner og en eller flere human Ig-letkæde-lambda-J-regioner opstrøms af den konstante værtsgnaver-lambda-region; og (b) eventuelt en eller flere human IgH-V-regioner, en eller flere human D-regioner og en eller flere human J-regioner opstrøms af den konstante værtsgnaver-region; hvor indsættelsen er således at gnaveren er i stand til at fremstille et repertoire af kimære antistoffer eller lette antistofkæder med en konstant gnaverregion og en variabel humanregion, hvor trinnene (a) og (b), når begge er til stede, kan udføres i hvilken som helst rækkefølge, hvor en eller flere indsættelseshændelser anvender punkt-specifik rekombination hvor indsættelsesfremgangsmåden begynder ved et punkt, hvor en startkassette er blevet indsat i genomet af gnavercellen, såsom en ES-celle; og hvor indsættelsen af et første DNA-fragment i startkassetten efterfølges af indsættelse af et andet DNA-fragment i en del af det første DNA-fragment, og hvor indsættelsen af human-DNA'et foretages mellem den konstante gnaverregion og den sidste, 3', J-gnaverregion.
3. Fremgangsmåde til fremstilling afen gnavercelle, fremgangsmåden omfattende at indsætte i et gnavercellegenom; (a) en flerhed af human IgH-V-regioner, en eller flere human D-regioner og en eller flere human J-regioner opstrøms af en konstant region af værtsgnaveren; og (b) eventuelt en eller flere human Ig-letkæde-kappa-V-regioner og en eller flere human Ig-letkæde-kappa-J-regioner opstrøms af den konstante værtsgnaver-pattedyrs-kappa-region og/eller en eller flere human Ig-letkæde-lambda-V-regioner og en eller flere human Ig-letkæde-lambda-J-regioner opstrøms af den konstante værtsgnaver-pattedyrs-lambda-region; henholdsvis, hvor trinnene (a) og (b), når begge er til stede, kan udføres i hvilken som helst rækkefølge, hvor, en eller flere indsættelseshændelser anvender punkt-specifik rekombination, hvor indsættelsesfremgangsmåden begynder ved et punkt, hvor en startkassette er blevet indsat i genomet af gnavercellen, såsom en ES-celle, og hvor indsættelsen af et første DNA-fragment i startkassetten efterfølges af indsættelse af et andet DNA-fragment i en del af det første DNA-fragment, og hvor indsættelsen af human-DNA'et foretages mellem den konstante gnaverregion og den sidste, 3', J-gnaverregion.
4. Fremgangsmåde til fremstilling afen gnavercelle fremgangsmåden omfattende at indsætte i et gnavercellegenom; (a) en flerhed af human Ig-letkæde-kappa-V-regioner og en eller flere human Ig-letkæde-kappa-J-regioner opstrøms af den konstante værtsgnaver-kappa -region og/eller en flerhed af human Ig-letkæde-lambda-V-regioner og en eller flere human Ig-letkæde-lambda-J-regioner opstrøms af den konstante værtsgnaver-lambda-region; og (b) eventuelt en eller flere human IgH-V-regioner, en eller flere human D-regioner og en eller flere human J-regioner opstrøms af den konstante værtsgnaver-region; hvor trinnene (a) og (b), når begge er til stede, kan udføres i hvilken som helst rækkefølge, hvor en eller flere indsættelseshændelser anvender punkt-specifik rekombination hvor indsættelsesfremgangsmåden begynder ved et punkt, hvor en startkassette er blevet indsat i genomet af gnavercellen, såsom en ES-celle; og hvor indsættelsen af et første DNA-fragment i startkassetten efterfølges af indsættelse af et andet DNA-fragment i en del af det første DNA-fragment, og hvor indsættelsen af human-DNA'et foretages mellem den konstante gnaverregion og den sidste, 3', J-gnaverregion.
5. Fremgangsmåde ifølge krav 1 -4, hvor den punkt-specifikke rekombination er RMCE.
6. Fremgangsmåde ifølge krav 5, hvor RMCE er sekventiel RMCE (SRMCE).
7. Fremgangsmåde ifølge et hvilket som helst foregående krav omfattende trinnene: i. indsættelse af DNA danner en startkassette i genomet af en celle; ii. indsættelse af et første DNA-fragment i indsættelsespunktet, det første DNA-fragment omfattende en første del af en human VDJ- eller VJ-DNA-region og en første vektordel indeholdende en første valgbar markør eller generende en valgbar markør ved indsættelse; iii. eventuelt fjernelse af en del af vektor-DNA'et; iv. indsættelse af et andet DNA-fragment i vektordelen af det første DNA-fragment, det andet DNA-fragment indeholdende en anden del af human VDJ- eller VJ-DNA og en anden vektordel, den anden vektordel indeholdende en anden valgbar markør, eller generende en anden valgbar markør ved indsættelse; v. fjernelse af et hvilket som helst vektor-DNA for at tillade det første og andet human DNA-fragment at danne en nabosekvens; og vi. iteration af trinnene af indsættelse af en del af human V(D)J-DNA'et og vektor-DNA-fjernelse, efter behov, for at fremstille en celle med hele eller en del af human VDJ- eller VJ-regionen tilstrækkelig til at være i stand til at generere et kimært antistof i forbindelse med en konstant værtsregion.
8. Fremgangsmåde ifølge krav 7 hvor tre heterospecifikke og inkompatible loxP-punkter anvendes.
9. Fremgangsmåde ifølge et hvilket som helst foregående krav hvor de punktspecifikke rekombinationspunkter er ΙοχΡ-punkter, eller variationer deraf, eller FRT-punkter, eller variationer deraf.
10. Fremgangsmåde ifølge et hvilket som helst foregående krav, hvor de punktspecifikke rekombinasesystemer vælges fra Cre-lox, og FLP/FRT, eller kombinationer deraf.
11. Fremgangsmåde ifølge et hvilket som helst foregående krav anvendende en vektor, vektoren omfattende en indsats omfattende en region af human DNA fra nogle af de humane VDJ- eller VJ-locus flankeret af DNA som ikke er fra den locus, og hvor det flankerende DNA omfatter en eller flere valgbare markører eller et eller flere punkt-specifikke rekombinationspunkter.
12. Fremgangsmåde ifølge krav 11, hvor vektoren omfatter 2 eller flere, såsom 3, heterospecifikke og inkompatible punkt-specifikke rekombinationspunkter.
13. Fremgangsmåde ifølge krav 11 eller 12, hvor vektoren omfatter en eller flere transposon ITR (inverteret terminal gentagelse) -sekvenser.
14. Fremgangsmåde ifølge et hvilket som helst foregående krav, hvor startkassetten indsættes i tung kæde gnaverlocussen, til anvendelse i indsættelse af tung kæde human-DNA.
15. Fremgangsmåde ifølge et hvilket som helst foregående krav, hvor en startkassette indsættes i letkæde gnaverlocussen, til anvendelse i indsættelse af letkæde human-VJ-DNA.
16. Fremgangsmåde ifølge et hvilket som helst foregående krav hvor startkassetten indsættes mellem position 114,667,090 og 114,665,190 af mussekromosom 12 (NCBI m37, april 2007 ENSEMBL Release 55.37h for mussestammen C57BL/6J.
17. Fremgangsmåde ifølge et hvilket som helst foregående krav hvor det første humane variable regionfragment indsættes med homolog rekombination ved startkassetteskeletsekvensen og derefter DNA'et af en hvilken som helst negativ valgmarkør og startkassette i vektoren efterfølgende fjernes ved rekombination mellem rekombinasemålsekvenser.
18. Fremgangsmåde ifølge et hvilket som helst foregående krav, hvor 5' enden af human-indsatsen øges i længden.
19. Fremgangsmåde ifølge et hvilket som helst foregående krav, hvor cellen er en ES-celle.
20. Fremgangsmåde ifølge et hvilket som helst foregående krav hvor: en eller flere gnaverkontrolsekvenser såsom enhancer-sekvensen opretholdes opstrøms af den konstante Mu-gnaverregion, passende i sin egen position i forhold til afstanden fra den konstante region; eller en eller flere gnaverkontrolsekvenser såsom en eller flere enhancer-sekvenser opretholdes nedstrøms af den konstante Mu-gnaverregion, passende i sin egen position i forhold til afstanden fra den konstante region; eller en gnaverskiftersekvens, passende den endogene skiftersekvens, opretholdes opstrøms af den konstante Mu-gnaverregion, passende i sin egen position i forhold til afstanden fra den konstante region.
21. Fremgangsmåde ifølge krav 19, hvor ES-cellen omfatter en fuldkommen human VDJ- eller VJ-sekvens, eller en del deraf.
22. Fremgangsmåde til fremstilling af et antistof specifikt til et ønsket antigen, fremgangsmåden omfattende immunisering af en gnaver fremstillet ifølge kravene 1, 2 eller 5-21 med det ønskede antigen og genvinding af antistoffet.
23. Fremgangsmåden ifølge krav 22, yderligere omfattende genvinding af antistoffet eller celler udtrykkende antistoffet, og derefter erstatning af den konstante ikke-human-pattedyrs-region med en konstant human-region for at fremstille et fuldt humaniseret antistof.
24. Fremgangsmåden ifølge krav 22 eller krav 23 yderligere omfattende generering af et kimært antistofderivat af det kimære antistof ifølge krav 22 eller 23.
25. Fremgangsmåden ifølge krav 24, hvor de kimære antistoffer ifølge krav 22 eller 23 manipuleres, eventuelt på DNA-niveauet, til at generere molkyler med antistofagtige egenskaber eller struktur valgt fra: et domæneantistof; eller en variabel humanregion med en hvilken som helst konstant region fra enten tung eller let kæde fra den samme eller forskellige arter; eller en variabel humanregion sammen med en hvilket som helst anden fusionspartner.
26. Fremgangsmåden ifølge et hvilket som helst af kravene 22 til 25 yderligere omfattende fremstilling af en farmaceutisk sammensætning omfattende at kombinere antistoffet, med en farmaceutisk acceptabel bærer eller anden excipiens for at fremstille sammensætningen.
27. Fremgangsmåde ifølge krav 22, yderligere omfattende at dyrke eller aflede en antistof-producerende celle eller cellelinje fra gnavercellen, eventuelt hvor antistofcellen eller cellelinjen immortaliseres enten ved fusion til en tumorcelle for at tilvejebringe en antistof-producerende celle og cellelinje, eller ved direkte cellulær immortalisering.
28. Gnaver genereret med fremgangsmåderne ifølge et hvilket som helst af kravene 1, 2 eller 5-21.
29. Gnaver ifølge krav 28 omfattende en fuldkommen human VDJ- eller VJ-sekvens eller en del deraf.
30. Gnavercelle isoleret fra gnaveren ifølge krav 28 eller 29, cellen omfattende en fuldkommen human VDJ- eller VJ-sekvens eller en del deraf.
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