Mar 1, 1972

Increased uptake of amino acids and 2-deoxy-D-glucose by virus-transformed cells in culture

Proceedings of the National Academy of Sciences of the United States of America
K J Isselbacher

Abstract

Transformed and nontransformed cells in tissue culture differ in their rate of uptake of certain nutrients, as determined by a polyester-coverslip technique. A 2.5- to 3.5-fold increased rate of uptake of alpha-aminoisobutyric acid, cycloleucine, and 2-deoxy-D-glucose was observed with polyoma virus-transformed baby hamster kidney (BHK) 21 cells and simian virus 40 (SV40)-transformed BALB/3T3 (mouse fibroblast) cells, compared to their nontransformed counterparts. Kinetic analysis suggested that the increased uptake by cells transformed with virus was associated with a 3-fold greater V(max), with no detectable changes in apparent K(m). Limited studies also revealed increased initial rates of uptake by murine sarcoma virus-transformed rat liver cells, as compared to the parental line. Exposure of cells to concanavalin A and wheat-germ agglutinin led to significant reductions in amino-acid uptake by both transformed and nontransformed cells; however, transformed cells showed a greater decrease in uptake after exposure to wheat-germ agglutinin. Increased initial rates of uptake of certain amino acids and sugars may be a feature common to transformed cells, compared to their parental control.

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References

Mentioned in this Paper

Arginine hydrochloride
2-aminoisobutyric acid
Sarcoma
Isolectins
Hexoses
Amino Acids, I.V. solution additive
Simian virus 40
Uptake
Hamsters
Moloney murine sarcoma virus

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