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hTERT promoter induces tumor-specific Bax gene expression and cell killing in syngenic mouse tumor model and prevents systemic toxicity.

Abstract：

:We recently showed that the human telomerase reverse transcriptase (hTERT) promoter induces tumor-specific Bax gene expression and selectively kills various human cancer cells both in vitro and in xenograft tumors. However, it remains unclear whether the hTERT promoter can be used to induce transgene expression in syngenic tumors in mice and whether Bax gene expression driven by the hTERT promoter will cause long-term, stem cell-related toxicity. To address these questions, we tested hTERT promoter-driven, adenovirus-mediated Bax transgene expression in an established syngenic mouse tumor model and its effects on tumor and normal murine tissues. The hTERT promoter was highly active in several murine tumor cell lines and a transformed cell line, but not in non-transformed and normal murine cell lines. The hTERT promoter induced tumor-specific Bax gene expression in mouse UV-2237m fibrosarcoma cells both in vitro and in vivo and suppressed syngenic tumor growth in immune-competent mice with no obvious acute or long-term toxic effects. Moreover, hTERT promoter-driven transgene expression in human CD34(+) bone marrow progenitor cells had effects similar to those observed in other normal human cells, suggesting that the hTERT promoter is much less active in CD34(+) cells than in tumor cells. Together, our data demonstrate that the hTERT promoter may allow the use of proapoptotic genes for cancer treatment without noticeable effects on progenitor cells.

journal_name

Gene Ther

journal_title

Gene therapy

authors

Gu J,Andreeff M,Roth JA,Fang B

doi

10.1038/sj.gt.3301619

keywords:

subject

Has Abstract

pub_date

2002-01-01 00:00:00

pages

30-7

issue

1

eissn

0969-7128

issn

1476-5462

journal_volume

9

pub_type

杂志文章

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