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Adenoviral-mediated gene transfer of a constitutively active retinoblastoma gene inhibits human pancreatic tumor cell proliferation.

Abstract：

BACKGROUND:The development of pancreatic cancer involves an accumulation of genetic changes, including oncogene activation and mutations in tumor suppressor genes important in cell cycle regulation. As a step to developing gene therapies to restore cell cycle control, we hypothesized that adenoviral-mediated gene transfer of a constitutively active, nonphosphorylatable form of the retinoblastoma gene (AdRb) would inhibit human pancreatic tumor cell proliferation. METHODS:Transfection efficiency was assessed by beta-gal staining with an adenovirus expressing the beta-galactosidase gene (AdLacZ). The effect of AdRb on DNA synthesis in pancreatic cancer cell lines was determined by tritiated thymidine incorporation. Western blotting with an antihemagglutinin antibody directed to the hemagglutinin-tagged AdRb construct was performed to confirm transfection of pancreatic cancer cells. Apoptosis was evaluated with a TUNEL assay. RESULTS:Efficient transfection of human pancreatic cancer cell lines was achieved with AdLacZ. AdRb inhibited tritiated thymidine uptake in the cancer cell lines BxPC-3, MIA PaCa-2, and PANC-1. Western blotting confirmed transfection of cancer cells with AdRb. AdRb did not inhibit growth by apoptosis. CONCLUSIONS:Adenoviral-mediated gene delivery of constitutively active Rb produces significant growth inhibition in human pancreatic cancer cell lines and is not a result of apoptosis. Further studies examining the role of Rb in pancreatic cancer are warranted.

journal_name

Surgery

journal_title

Surgery

authors

Simeone DM,Cascarelli A,Logsdon CD

doi

10.1016/s0039-6060(97)90036-2

subject

Has Abstract

pub_date

1997-08-01 00:00:00

pages

428-33; discussion 433-4

issue

2

eissn

0039-6060

issn

1532-7361

pii

S0039-6060(97)90036-2

journal_volume

122

pub_type

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