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Journal of Clinical Endocrinology & Metabolism, Vol 46, 511-513, Copyright © 1978 by Endocrine Society

ARTICLES

Increased plasma somatomedin reactivity in chronic renal failure as determined by acid gel filtration and radioreceptor assay

A Schiffrin, H Guyda, P Robitaille and B Posner

Plasma Somatomedin (SM) reactivity has been determined in patients with chronic renal failure and in normal children by radioreceptor assay (RRA) following acid gel filtration on Sephadex G-100. Total small molecular weight SM reactivity was obtained by the summation of all values between Kav 0.55 to 0.75. The mean SM reactivity (+/-SE) for the renal failure group (N = 9) was 154 +/- 10 ng/ml and for the normal subjects (N = 9) was 91 +/- 5 ng/ml (p less than .001). The renal failure group also had significantly increased mean levels of insulin, GH and PRL, but individual increases were not always concordant. Our data reveal that small molecular weight SM reactivity as determined by RRA of column eluates is increased in chronic renal failure compared to normal controls. Thus SM reactivity is not low in chronic renal failure, supporting the suggestion that peripheral antagonism to SM action contributes to the growth failure observed in these patients.




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