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Toxic effect of puromycin on erythrocyte membranes which is unrelated to inhibition of protein synthesis

ER Burka, SK Ballas and SM Sabesin

Cardeza Foundation for Hematologic Research, Philadelphia, Pa. 19107.

Exposure of rabbit or human erythrocytes to concentrations of puromycin as low as 7 x 10(-4)M for 2 hr causes damage to the cell membrane, as evidenced by increased susceptibility of the cells to hyposmotic lysis, increased cell rigidity, and ultrastructural changes consistent with severe membrane damage. Puromycin causes a concentration-dependent internalization of the erythrocyte membrane, resulting in vacuolization of the cells, at concentrations between 7 x 10(-4) M and 10(-2) M. Since the erythrocyte does not synthesize protein, the data indicate that puromycin has a direct toxic effect on erythroid cell membranes which is unrelated to its action in inhibiting the synthesis of protein.

Volume 45, Issue 1, pp. 21-27, 01/01/1975
Copyright © 1975 by The American Society of Hematology


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  Copyright © 1975 by American Society of Hematology         Online ISSN: 1528-0020