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Title: Effects of thymidine phosphorylase on tumor aggressiveness and 5-fluorouracil sensitivity in cholangiocarcinoma
Authors: Jongkonnee Thanasai
Temduang Limpaiboon
Patcharee Jearanaikoon
Banchob Sripa
Chawalit Pairojkul
Srisurang Tantimavanich
Masanao Miwa
Mahidol University
Khon Kaen University
Nagahama Institute of Bio-Science and Technology
Keywords: Medicine
Issue Date: 7-Apr-2010
Citation: World Journal of Gastroenterology. Vol.16, No.13 (2010), 1631-1638
Abstract: Aim: To evaluate the role of thymidine phosphorylase (TP) in cholangiocarcinoma using small interfering RNA (siRNA). Methods: A human cholangiocarcinoma-derived cell line KKU-M139, which has a naturally high level of endogenous TP, had TP expression transiently knocked down using siRNA. Cell growth, migration, in vitro angiogenesis, apoptosis, and cytotoxicity were assayed in TP knockdown and wild-type cell lines. Results: TP mRNA and protein expression were decreased by 87.1% ± 0.49% and 72.5% ± 3.2%, respectively, compared with control cells. Inhibition of TP significantly decreased migration of KKU-M139, and suppressed migration and tube formation of human umbilical vein endothelial cells. siRNA also reduced the ability of TP to resist hypoxia-induced apoptosis, while suppression of TP reduced the sensitivity of KKU-M139 to 5-fluorouracil. Conclusion: Inhibition of TP may be beneficial in decreasing angiogenesis-dependent growth and migration of cholangiocarcinoma but may diminish the response to 5-fluorouracil chemotherapy. © 2010 Baishideng.
ISSN: 10079327
Appears in Collections:Scopus 2006-2010

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