American Journal of Clinical Nutrition, Vol 42, 577-584, Copyright © 1985 by The American Society for Clinical Nutrition, Inc

ORIGINAL RESEARCH COMMUNICATIONS

Plasma concentrations of transsulfuration pathway products during nasoenteral and intravenous hyperalimentation of malnourished patients

RK Chawla, CJ Berry, MH Kutner and D Rudman

We have monitored the plasma concentrations of products of the transsulfuration pathway in 11 undernourished noncirrhotic patients, and in 10 cachectic cirrhotic subjects, before and during nasoenteral nutrition with Vivonex (Norwich-Eaton Pharmaceuticals, Norwich, NY) or total parenteral nutrition (TPN) with FreAmine III (American McGaw, Irvine, CA). In the cirrhotic cases eating a mixed diet, levels of taurine, cysteine, plasma glutathione, and free choline were subnormal. During nasoenteral hyperalimentation, methionine was elevated while cysteine, glutathione, and free choline levels remained depressed. During TPN, levels of taurine, cysteine, protein-bound cysteine, glutathione, free choline, and phosphatidyl choline were depressed and methionine was elevated. In the noncirrhotic cases eating a mixed diet, only the free choline concentration was low. During nasoenteral hyperalimentation, the plasma levels of both free choline and total carnitine were depressed. During TPN, plasma levels of cystine, protein- bound cysteine, total carnitine, free choline, and phosphatidyl choline were subnormal. These data suggest that biosynthesis of several products of the transsulfuration pathway may be inadequate in both cirrhotic and noncirrhotic patients during TPN with FreAmine III.

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