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Journal of Clinical Endocrinology & Metabolism, Vol 43, 882-888, Copyright © 1976 by Endocrine Society

ARTICLES

Radioimmunoassay and chromatographic similarity of circulating endogenous gonadotropin releasing hormone and hypothalamic extracts in man

CH Mortimer, AS McNeilly, LH Rees, PJ Lowry, D Gilmore and HG Dobbie

A highly sensitive radioimmunoassay for the gonadotropin releasing hormone has been developed in order to study its physiological importance in man. In view of the expected low concentrations in peripheral blood, large volumes of human plasma were extracted by two different methods and characteristics of the radioimmunoassayable material compared with those of synthetic decapeptide and extracts of human hypothalami. The results indicate that radioimmunoassayable gonadotropin releasing hormone is present in some human plasmas but the plasma concentration are less than 2.5 pg/ml. Peripheral levels were more consistently measurable in women at midcycle and after the menopause. The hormone was undetectable in the plasma of normel men, human cerebrospinal fluid, and fetal cerebral tissue, but was present in fetal hypothalami.


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R. Casper, S. Yen, and M. Wilkes
Menopausal flushes: a neuroendocrine link with pulsatile luteninizing hormone secreation
Science, August 24, 1979; 205(4408): 823 - 825.
[Abstract] [PDF]


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