S. S. C. Yen
University of California, San Diego
188 Papers
4.8K Citations
S. S. C. Yen is an academic researcher from University of California, San Diego. The author has contributed to research in topics: Luteinizing hormone & Gonadotropin. The author has an hindex of 75, co-authored 188 publications. Previous affiliations of S. S. C. Yen include Salk Institute for Biological Studies & Scripps Health.
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Papers
Localization and quantitation of beta-endorphin in human brain and pituitary.
TL;DR: The present data represent the first unequivocal localization and quantitation of βh-EP in human brain and in the separate lobes of the human pituitary.
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Characterization of the inappropriate gonadotropin secretion in polycystic ovary syndrome
TL;DR: Data indicate that in these PCO patients the abnormalities of the hypothalamic-pituitary regulation of gonadotropin secretion was not an inherent defect but represented a functional derangement consequent to inappropriate estrogen feedback, which led to a vicious cycle of chronic anovulation and inappropriate gonadotropic secretion.
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A Specific Homologous Radioimmunoassay for Human β-Endorphin: Direct Measurement in Biological Fluids
TL;DR: A highly sensitive and specific homologous RIA for direct measurement of human β-endorphin (βh-EP) has been developed and indicates that the antiserum against βh- EP recognizes different antigenic determinants in the β-EP molecule compared to the corresponding animal peptides.
93
Evidence for an Influence of the Ovary on Circulating Dehydroepiandrosterone Sulfate Levels
TL;DR: It is suggested that ovarian factors separate from estrogen-mediated effects significantly influence the reduction of DS levels independent of age.
84
Marked augmentation of nocturnal melatonin secretion in amenorrheic athletes, but not in cycling athletes: unaltered by opioidergic or dopaminergic blockade.
TL;DR: In conclusion, athleticism in women is associated with an elevation of daytime melatonin levels independent of menstrual status, and the significance and neuroendocrine basis for the expanded melatonin secretion in athletic amenorrheic women remains to be elucidated.
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