Hum Genet. 1976 Dec 15;34(3):277-83.

Rapid prenatal and postnatal detection of inborn errors of propionate, methylmalonate, and cobalamin metabolism: a sensitive assay using cultured cells.

Willard HF, Ambani LM, Hart AC, Mahoney MJ, Rosenberg LE.

Abstract

A sensitive, reliable, and easily performed procedure is described for the prenatal and postnatal detection of inborn errors of propionate, methylmalonate, and cobalamin metabolism using cultured amniotic cells and skin fibroblasts. With this assay, control fibroblast lines incorporated a mean of 6.89 nanoatoms 14C/mg protein from [1-14C]propionate into trichloroacetic acid (TCA)-precipitable cell material in 10 h. Twenty-five mutant fibroblast lines from patients with propionicacidemia or one of the methylmalonicacidemias fixed 0.04 to 0.93 nanoatoms 14C/mg. Considerable variation was observed, both among and within discrete mutant classes, with respect to the residual amount of propionate pathway activity, possibly reflecting further molecular heterogeneity in these disorders. We applied this procedure to cultured amniotic cells from controls and 4 midtrimester pregnancies at risk for methylmalonicacidemia and diagnosed one fetus with a methylmalonyl CoA apomutase defect and 3 fetuses which were unaffected.

PMID:: 1002151; [PubMed - indexed for MEDLINE]

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