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Folate polyglutamate and monoglutamate accumulation in normal and SV40-transformed human fibroblasts

✍ Scribed by Robert M. Hoffman; Dennis W. Coalson; Stephen J. Jacobsen; Richard W. Erbe

Publisher
John Wiley and Sons
Year
1981
Tongue
English
Weight
489 KB
Volume
109
Category
Article
ISSN
0021-9541

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✦ Synopsis

Abstract

Folate polyglutamate and monoglutamate accumulation was measured in normal diploid and SV40‐transformed human fibroblasts by Sephadex G‐10 gel filtration chromatography. The cells were first depleted of folates and then provided with limiting amounts of [^3^H]‐folic acid in order that the cells would accumulate only forms of folate necessary for proliferation. Both the normal and the transformed cells accumulated monoglutamate and polyglutamate forms, but by 72 hours of labeling the transformed cells contained 3–10 times more polyglutamate than the normal cells. The growth rates for the normal and transformed cells were similar at this limiting folic acid concentration. Thus, if folate polyglutamates are more important for the proliferation of SV40‐transformed cells than the normal cells, then inhibition of polyglutamate formation may be an important potential target for chemotherapy.

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