关键词:
2 alpha-F-19-nor-22-oxa-1 alpha,25-D-3
non-calcemic
lung cancer
metastasis
摘要:
1 alpha,25-Dihydroxyvitamin D-3 (1 alpha,25-D-3) has potent antiproliferative and anti-invasive properties in vitro in cancer cells. However, the major limitation to its clinical use is that it causes hypercalcemia. Therefore, vitamin D analogs with potent cell regulatory effects but with weaker calcemic effects than 1 alpha,25-D-3 are required. Among them, 22-oxa-1 alpha,25-D-3 and 19-nor-1 alpha,25-D-3 have anti-cancer effects with relatively low calcemic effects. Modifications at the C-2ot position of the A-ring also produced analogs with a unique biological profile. Not only the side-chain but also the A-ring modification thus generates a unique analog with potent cell regulatory effects and low calcemic activity as well. We report here that the hybrid 1 alpha,25-D-3 analog, synthesized via the highly regio- and stereo-selective ring opening 2 alpha-fluorination and catalytic asymmetric carbonyl-ene cyclization, with 2 alpha-fluoro, 19-nor, and 22-oxa modification exhibits unique cell regulatory activities against the development of metastatic lung carcinoma. (c) 2007 Published by Elsevier B.V.