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- W2063065143 abstract "The cAMP analogue 8-Cl-cAMP induces apoptosis and inhibits proliferation of a wide variety of malignancies in vitro and in vivo with relatively little toxicity. The antitumor effects of this compound are thought to involve its ability to modulate type I protein kinase A (PKAI). However, a nontoxic metabolite of 8-Cl-cAMP, 8-Cl-adenosine, with no known activity against PKAI, exerts growth inhibitory effects in breast, ovary, pancreas, and colorectal cancer cells in vitro and accumulates in xenografted tumors after 8-Cl-cAMP treatment in vivo. To characterize further the antitumor effects of 8-Cl-adenosine in colorectal cancer, we examined its effects on cell growth in vitro (cell number, 3H-thymidine incorporation, and soft agar colony formation) using the isogenically matched colorectal cancer cell lines HCT116, HCT116-E6 (p53-depleted), and 80S14 (p21WAF1/Cip1-null). 8-Cladenosine inhibited cell growth by 89%, 74%, and 79%, respectively in HCT116, HCT116-E6, and 80S14 cells after a 72-hour exposure. Growth inhibition coincided with DNA endoreduplication and subsequent apoptosis. Furthermore, nontoxic doses of 8-Cl-adenosine administered i.p. twice weekly for 4 weeks to athymic mice suppressed growth of HCT116-derived xenografts by 50%. These results show that 8-Cl-adenosine exerts antitumor activity against colorectal cancer independent of p53 and p21WAF1/Cip1." @default.
- W2063065143 created "2016-06-24" @default.
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- W2063065143 date "2000-09-01" @default.
- W2063065143 modified "2023-10-18" @default.
- W2063065143 title "8-Cl-Adenosine-Induced Inhibition of Colorectal Cancer Growth In Vitro and In Vivo" @default.
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- W2063065143 doi "https://doi.org/10.1038/sj.neo.7900106" @default.
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