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Titolo:
Retroviral vectors for the transduction of autoregulated, bidirectional expression cassettes
Autore:
Unsinger, J; Kroger, A; Hauser, H; Wirth, D;
Indirizzi:
GBF, Natl Res Ctr Biotechnol, Dept Gene Regulat & Differentiat, D-38124 Braunschweig, Germany GBF Braunschweig Germany D-38124 erentiat, D-38124 Braunschweig, Germany
Titolo Testata:
MOLECULAR THERAPY
fascicolo: 5, volume: 4, anno: 2001,
pagine: 484 - 489
SICI:
1525-0016(200111)4:5<484:RVFTTO>2.0.ZU;2-O
Fonte:
ISI
Lingua:
ENG
Soggetto:
TETRACYCLINE-REGULATED SYSTEM; GENE-EXPRESSION; MAMMALIAN-CELLS; ACTIVATOR; THERAPY;
Keywords:
gene therapy; LTRs; retroviral vectors; tet-off system; stable expression; regulated expression;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Life Sciences
Citazioni:
20
Recensione:
Indirizzi per estratti:
Indirizzo: Hauser, H GBF, Natl Res Ctr Biotechnol, Dept Gene Regulat & Differentiat, D-38124 Braunschweig, Germany GBF Braunschweig Germany D-38124 D-38124 Braunschweig, Germany
Citazione:
J. Unsinger et al., "Retroviral vectors for the transduction of autoregulated, bidirectional expression cassettes", MOL THER, 4(5), 2001, pp. 484-489

Abstract

Regulated transgene expression is increasingly used in research but is also needed for certain therapies. Regulatory systems are usually composed of two expression units, one bearing the gene of interest under control of a regulatable promoter and the other, a constitutively expressed transactivator that modulates the activity of the regulatable promoter. Because the cotransfer of two independent elements is not efficient in primary cells, single transduction step vectors conferring regulatable gene expression cassettes would be helpful. We have developed retroviral vectors containing an autoregulatory bidirectional expression cassette that encodes all components necessary for regulated expression of a gene of interest. The influence of the orientation of the reporter gene with respect to the viral long terminal repeat (LTR) and the effect of transcriptionally inactive LTRs were investigated using mouse leukemia virus (MLV) and self-inactivating (SIN)-based retroviral vectors. Strict regulation was observed when the reporter was inserted in antisense orientation with respect to the LTR, whereas a sense arrangement of the reporter resulted in a loss of regulation capacity. Expression and regulation of the antisense-orientated reporter gene were homogenousin infected cell pools and investigated cell clones. Long-term observations of infected cells over a period of 30 passages revealed stable expressionand regulation. These autoregulated, bidirectional retroviral vectors combine the advantages of single-step transduction with strict regulation of the gene of interest in the infected target cells.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 05/04/20 alle ore 07:05:26