The influence of chlorderazin on the change of L-arginine transport in human erythrocytes induced by oxidized low density lipoprotein / 中国介入心脏病学杂志

ABSTRACT

Objective To observe the influence of chlorderazin on the change of L-arginine transport in human erythrocytes induced by oxidized low density lipoprotein. Methods Human erythrocytes were obtained from six healthy donors. The study included three groups Gr1 (control)? Gr2 (incubated with OX-LDL) and Gr3 (incubated with OX-LDL and chlorderazin, a PLA 2 inhibitor). The 3H-L-arginine transport was measured.Results Compared with Gr1, the Vmax for the total transport of L-arginine in erythrocytes in Gr2 decreased by 33%, and Km value increased. Compared with Gr2, the Vmax for the total transport and the transport via system y+ of L-arginine in erythrocytes in Gr3 increased by 37% and 25% respectively, and Km values decreased for both. But the change of L-arginine transport by system y+L was not statistically significant.Conclusion OX-LDL could inhibit L-arginine transport in human erythrocytes, which could be reversed by chlorderazin, a nonspecific PLA 2 inhibitor.