期刊
DERMATO-ENDOCRINOLOGY
卷 5, 期 1, 页码 -出版社
TAYLOR & FRANCIS INC
DOI: 10.4161/derm.23938
关键词
skin; keratinocytes; melanocytes; melanoma cells; dermal fibroblasts; vitamin D; 5,7-dienes
类别
资金
- NIH [R01AR052190, R01AR056666]
- University of Western Australia [1S10RR026377-01, 1S10OD010678-01]
- College of Pharmacy at the University of Tennessee Health Science Center
- Polish Ministry of Science and Higher Education [N405 623238]
- NATIONAL CENTER FOR RESEARCH RESOURCES [S10RR026377] Funding Source: NIH RePORTER
- NATIONAL INSTITUTE OF ARTHRITIS AND MUSCULOSKELETAL AND SKIN DISEASES [R01AR056666, R21AR063242, R01AR052190] Funding Source: NIH RePORTER
- OFFICE OF THE DIRECTOR, NATIONAL INSTITUTES OF HEALTH [S10OD010678] Funding Source: NIH RePORTER
Novel metabolic pathways initiated by the enzymatic action of CYP11A1 on 7DHC (7-dehydrocholesterol), ergosterol, vitamins D-3 and D-2 were characterized with help of chemical synthesis, UV and mass spectrometry and NMR analyses. The first pathway follows the sequence 7DHC -> 22(OH)7DHC -> 20,22(OH)(2) 7DHC -> 7DHP (7-dehydropregnenolone), which can further be metabolized by steroidogenic enzymes. The resulting 5,7-dienes can be transformed by UVB to corresponding, biologically active, secosteroids. Action of CYP11A1 on vitamin D-3 and D-2 produces novel hydroxyderivatives with OH added at positions C17, C20, C22, C23 and C24, some of which can be hydroxylated by CYP27B1 and/or by CYP27A1 and/or by CYP24A1. The main products of these pathways are biologically active with a potency related to their chemical structure and the target cell type. Main products of CYP11A1-mediated metabolism on vitamin D are non-calcemic and non-toxic at relatively high doses and serve as partial agonists on the vitamin D receptor. New secosteroids are excellent candidates for therapy of fibrosing, inflammatory or hyperproliferative disorders including cancers and psoriasis.
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