期刊
BIOCHEMICAL JOURNAL
卷 446, 期 -, 页码 79-87出版社
PORTLAND PRESS LTD
DOI: 10.1042/BJ20120726
关键词
cancer chemoprevention; crystal structure; luffariellolide; nuclear receptor; retinoic acid receptor (RAR)
资金
- National Basic Research Program of China [2012CB910104]
- National Natural Science Foundation of China [31070646]
- Ministry of Education of China [B06016]
- National Science Foundation of Fujian Province [2010J01230]
Retinoids display anti-tumour activity on various cancer cells and therefore have been used as important therapeutic agents. However, adverse side effects and RA (retinoic acid) resistance limit further development and clinical application of retinoid-based therapeutic agents. We report in the present paper the identification of a natural marine product that activates RARs (RA receptors) with a chemical structure distinct from retinoids by high-throughput compound library screening. Luffariellolide was uncovered as a novel RAR agonist by inducing co-activator binding to these receptors in vitro, further inhibiting cell growth and regulating RAR target genes in various cancer cells. Structural and molecular studies unravelled a unique binding mode of this natural ligand to RARs with an unexpected covalent modification on the RAR. Functional characterization further revealed that luffariellolide displays chemotherapeutic potentials for overcoming RA resistance in colon cancer cells, suggesting that luffariellolide may represent a unique template for designing novel non-retinoid compounds with advantages over current RA drugs.
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