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Radioimmunoassay of beta-MSH in human plasma and tissues.

Abstract
A radioimmunoassay method for beta-melanocyte-stimulating hormone (beta-MSH) has been developed and utilized in the identification and quantification of this hormone in human plasma and tissues. The concentration of beta-MSH in two human pituitary glands was found to be approximately 350 mug/g. beta-MSH was identified in the tumor tissue of all 11 patients with the ectopic ACTH syndrome who were studied; concentrations in individual cases ranged from 3 to 1600 ng/g. In plasma of chronically hyperpigmented patients with Addison's disease, Cushing's disease (after bilateral adrenalectomy), and the ectopic ACTH syndrome, beta-MSH concentrations of 0.5-6 ng/ml were found. The degree of clinical hyperpigmentation was well correlated with the quantity of beta-MSH in the plasma. beta-MSH concentrations in the plasma of normal subjects were less than 0.09 ng/ml. In all of these circumstances, bioassays for MSH were also performed, and it was found that most of the biologic MSH activity of the plasma and tissues could be accounted for by beta-MSH.
AuthorsK Abe, W E Nicholson, G W Liddle, D P Island, D N Orth
JournalThe Journal of clinical investigation (J Clin Invest) Vol. 46 Issue 10 Pg. 1609-16 (Oct 1967) ISSN: 0021-9738 [Print] United States
PMID4294052 (Publication Type: Journal Article)
Chemical References
  • Hormones, Ectopic
  • Iodine Isotopes
  • Adrenocorticotropic Hormone
  • Melanocyte-Stimulating Hormones
Topics
  • Addison Disease
  • Adrenocorticotropic Hormone (metabolism)
  • Cushing Syndrome
  • Hormones, Ectopic (metabolism)
  • Humans
  • Iodine Isotopes
  • Melanocyte-Stimulating Hormones (analysis, blood)
  • Pituitary Gland (analysis)
  • Radioimmunoassay

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