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Titolo:
High level expression of hepatitis B virus surface antigen in stably transfected Drosophila Schneider-2 cells
Autore:
Deml, L; Wolf, H; Wagner, R;
Indirizzi:
Univg,egensburg, Klinikum Regensburg, Inst Med Microbiol, D-93053 Regensbur Univ Regensburg Regensburg Germany D-93053 Microbiol, D-93053 Regensbur
Titolo Testata:
JOURNAL OF VIROLOGICAL METHODS
fascicolo: 2, volume: 79, anno: 1999,
pagine: 191 - 203
SICI:
0166-0934(199905)79:2<191:HLEOHB>2.0.ZU;2-U
Fonte:
ISI
Lingua:
ENG
Soggetto:
PROKARYOTIC DIHYDROFOLATE-REDUCTASE; METHOTREXATE-RESISTANCE; REGULATED EXPRESSION; INSECT CELLS; GENE; PARTICLES; YEAST; MELANOGASTER; VECTOR; DNA;
Keywords:
Drosophila Schneider-2 cells; HBsAg; gene expression; copy number;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
34
Recensione:
Indirizzi per estratti:
Indirizzo: Wagner, R Univlleeensburg, Klinikum Regensburg, Inst Med Microbiol, Franz Josef Str A Univ Regensburg Franz Josef Str Allee 11 Regensburg Germany D-93053
Citazione:
L. Deml et al., "High level expression of hepatitis B virus surface antigen in stably transfected Drosophila Schneider-2 cells", J VIROL MET, 79(2), 1999, pp. 191-203

Abstract

Two transfer vector systems have been constructed for the generation of Drosophila melanogaster Schneider-2 (DS-2) cells transfected stably and used to express the small surface antigen of hepatitis B virus (HBsAg). One system is based on the cotransfection of an expression vector for the S gene under the control of an inducible Drosophila metallothionein (Mtn) promotor and a resistance plasmid which carries a selectable marker dihydrofolate reductase (dhfr) gene under the control of a Drosophila actin 5C distal promoter. The second system is based on the transfection of a single plasmid, which includes both expression units. Both vector systems were suitable for the generation of stably transfected DS-2 cell-lines secreting high levels ofHBsAg. The quantities of HBsAg expression from polyclonal DS-2 cells correlated strictly with the concentration of the transfected S gene expression vector. Clonal cell-lines selected from the most efficient HBsAg producing polyclonal cell-populations were examined in more detail. All of the transfected S genes were found to be integrated and the copy numbers per genome varied extremely between 10 and 240. Furthermore, the levels of secreted HBsAg varied greatly between different clones and in best they reached up to 7mu g/ml under serum-free cell culture conditions. Thus, DS-2 cells transfected stably provide an alternative source for the production of HBsAg particles for diagnostic purposes and vaccine development. (C) 1999 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 25/09/20 alle ore 13:41:31