期刊
FEBS LETTERS
卷 580, 期 14, 页码 3368-3374出版社
WILEY
DOI: 10.1016/j.febslet.2006.05.007
关键词
thromboxane; cancer cells; carcinoma; colon; cell proliferation
Tumor growth of colorectal cancers accompanies upregulation of cyclooxygenase-2, which catalyzes a conversion step from arachidonic acid to prostaglandin H-2 (PGH(2)). Here, we compared the expression levels of thromboxane synthase (TXS), which catalyzes the conversion of PGH2 to thromboxane A(2) (TXA(2)), between human colorectal cancer tissue and its accompanying normal mucosa. It was found that TXS protein was consistently upregulated in the cancer tissues from different patients. TXS was also highly expressed in human colonic cancer cell lines. Depletion of TXS protein by the antisense oligonucleotide inhibited proliferation of the cancer cells. This inhibition was rescued by the direct addition of a stable analogue of TXA2. The present results suggest that overexpression of TXS and subsequent excess production of TXA2 in the cancer cells may be involved in the tumor growth of human colorectum. (c) 2006 Federation of European Biochemical Societies. Published by Elsevier B.V. All rights reserved.
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