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. 1967 Dec;46(12):2064–2082. doi: 10.1172/JCI105694

Use of 125I- and 51Cr-Labeled Albumin for the Measurement of Gastrointestinal and Total Albumin Catabolism*

Robert M Kerr 1,‡, John J Du Bois 1, Peter R Holt 1
PMCID: PMC292957  PMID: 5630419

Abstract

A method for the simultaneous measurement of gastrointestinal protein loss and total albumin turnover entailing the use of a combination of 125iodine- and 51chromium-labeled albumin is described. Albumin turnover was calculated by the measurement of albumin-125I plasma decay and cumulative urinary excretion, and the results obtained agreed closely with previous studies utilizing albumin-131I. Gastrointestinal catabolism was calculated from the rate of fecal excretion of 51Cr and the specific activity of plasma albumin-51Cr, and these data were related to the calculated albumin turnover results. During the period of 6-14 days after administration, the ratio of specific activties of albumin-125I and -51Cr in plasma and in extravascular spaces or gastric and biliary secretions remained almost identical. Fecal excretion of 51Cr was also quite stable at this time. In six normal subjects gastrointestinal catabolism accounted for less than 10% of total albumin catabolism. Excessive gastrointestinal protein losses did not contribute to the low serum albumin in three patients with cirrhosis or in two adults with the nephrotic syndrome. Multiple mechanisms leading to hypoalbuminemia were demonstrated in other subjects with a variety of gastrointestinal disorders.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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