Abstract
The photosynthesis of previtamin D 3 from 7-dehydrocholesterol in human skin was determined after exposure to narrow-band radiation or simulated solar radiation. The optimum wavelengths for the production of previtamin D 3 were determined to be between 295 and 300 nanometers. When human skin was exposed to 295-nanometer radiation, up to 65 percent of the original 7-dehydrocholesterol content was converted to previtamin D 3 . In comparison, when adjacent skin was exposed to simulated solar radiation, the maximum formation of previtamin D 3 was about 20 percent. Major differences in the formation of lumisterol 3 and tachysterol 3 from previtamin D 3 were also observed. It is concluded that the spectral character of natural sunlight has a profound effect on the photochemistry of 7-dehydrocholesterol in human skin.
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Dates
Type | When |
---|---|
Created | 18 years, 11 months ago (Oct. 5, 2006, 10:30 a.m.) |
Deposited | 1 year, 7 months ago (Jan. 14, 2024, 1:31 p.m.) |
Indexed | 1 day, 16 hours ago (Sept. 4, 2025, 9:33 a.m.) |
Issued | 43 years, 3 months ago (May 28, 1982) |
Published | 43 years, 3 months ago (May 28, 1982) |
Published Print | 43 years, 3 months ago (May 28, 1982) |
@article{MacLaughlin_1982, title={Spectral Character of Sunlight Modulates Photosynthesis of Previtamin D 3 and Its Photoisomers in Human Skin}, volume={216}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.6281884}, DOI={10.1126/science.6281884}, number={4549}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={MacLaughlin, J. A. and Anderson, R. R. and Holick, M. F.}, year={1982}, month=may, pages={1001–1003} }