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result sql = Calcium channel blockers and the risk of cancer: a preclinical assessment.
Calcium channel blockers and the risk of cancer: a preclinical assessment.
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result sql = The preclinical evidence for a potential influence of calcium channel blockers (CCBs) on carcinogenesis is discussed in the light of a broad database from rodent carcinogenicity studies as well as literature data. In all bioassays performed in rats and mice on the dihydropyridine CCBs--nifedipine, nimodipine, nisoldipine, and nitrendipine--no evidence was found for a carcinogenic potential of these compounds. Calcium is an essential intracellular signal for cell proliferation and apoptosis. The crucial role of increased cell proliferation in all stages of carcinogenesis is well documented. Some indirect experimental evidence also points to a role of defective apoptosis in tumor promotion. CCBs uniformly inhibit cell proliferation, whereas the influence of CCBs on apoptosis is inconsistent, resulting in an inhibition or increase in apoptosis dependent on cell type. Accordingly, antitumorigenic effects of CCBs have been reported based on their antiproliferative action. A tumor-promoting effect of CCBs based on inhibition of apoptosis, however, remains purely speculative and, in fact, can be denied based on the results of in vivo bioassays. It is therefore concluded that there is no preclinical evidence that should give rise to concern over the carcinogenic potential of dihydropyridine-type CCBs.

Publication: Cardiovasc Drugs Ther 1998 May ;12(2)::157-69.
Publication Date: 1998 May
Study Author(s): Ahr, H J;Bomhard, E;Enzmann, H;Karbe, E;Mager, H;Sander, E;Schlüter, G;
Institution: Institute of Toxicology, Bayer AG, Wuppertal, Germany.
Shortcut link to this study:
The preclinical evidence for a potential influence of calcium channel blockers (CCBs) on carcinogenesis is discussed in the light of a broad database from rodent carcinogenicity studies as well as literature data. In all bioassays performed in rats and mice on the dihydropyridine CCBs--nifedipine, nimodipine, nisoldipine, and nitrendipine--no evidence was found for a carcinogenic potential of these compounds. Calcium is an essential intracellular signal for cell proliferation and apoptosis. The crucial role of increased cell proliferation in all stages of carcinogenesis is well documented. Some indirect experimental evidence also points to a role of defective apoptosis in tumor promotion. CCBs uniformly inhibit cell proliferation, whereas the influence of CCBs on apoptosis is inconsistent, resulting in an inhibition or increase in apoptosis dependent on cell type. Accordingly, antitumorigenic effects of CCBs have been reported based on their antiproliferative action. A tumor-promoting effect of CCBs based on inhibition of apoptosis, however, remains purely speculative and, in fact, can be denied based on the results of in vivo bioassays. It is therefore concluded that there is no preclinical evidence that should give rise to concern over the carcinogenic potential of dihydropyridine-type CCBs.
PMID: 9652874

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