Abstract:
:Retinoic acid (RA) and its natural and synthetic analogs, the retinoids, regulate many biological processes, including development, differentiation, cell growth, morphogenesis, metabolism and homeostasis. Retinoid effects are mediated by specific nuclear receptors, the RARs and RXRs. Because of their ability to control cell growth and induce differentiation, retinoids are being examined for the prevention and treatment of several cancers. The majority of retinoids so far analyzed and available inhibit primarily cell proliferation and tumor progression but cannot eliminate cancer cells. In addition, the beneficial effects of the natural retinoids are undermined by undesirable side effects, possibly due to indiscriminate activation of all retinoid receptor subtypes and response pathways. Here, we show that a synthetic retinoid, CD-271, that activates selectively the RAR gamma subtype in a given context, shows increased anti-proliferative activity against certain carcinoma cells over all-trans-retinoic acid (tRA). CD-271 exhibits enhanced activity against DU-145 prostate adenocarcinoma cells through apoptosis-inducing activity, while tRA does not. The selective anti-cancer cell action appears to be receptor-mediated as an RAR antagonist reverses the inhibition. This profile was not seen with other selective retinoids, such as RAR alpha-selective agonists, anti-AP-1 compounds and a non-apoptosis inducing RAR gamma agonist. Our data point to a specific role for RAR gamma in controlling the growth of the prostate, consistent with previous RAR gamma gene knockout data. The identified retinoid represents a new class of compounds with potential for the treatment of prostate cancer.
journal_name
Int J Cancerjournal_title
International journal of cancerauthors
Lu XP,Fanjul A,Picard N,Shroot B,Pfahl Mdoi
10.1002/(sici)1097-0215(19990118)80:2<272::aid-ijcsubject
Has Abstractpub_date
1999-01-18 00:00:00pages
272-8issue
2eissn
0020-7136issn
1097-0215pii
10.1002/(SICI)1097-0215(19990118)80:2<272::AID-IJCjournal_volume
80pub_type
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