Cd4+ T cell apoptosis induced by anti-CD4 antibodies

Summary To explore the inhibitory effects of anti-CD4 human/murine chimeric antibodies on lymphocyte proliferation, CD4⁺ T cell apoptosis induced by anti-CD4 antibodies was examined. Annexin-V-FITC and PI double stain method was employed to qualitatively and quantitatively determined CD4⁺ T cell apoptosis induced by anti-CD4 antibodies. Our results showed that anti-CD4 chimeric antibodies could specifically induce CD4⁺ T cell apoptosis. The ability of anti-CD4 chimeric antibodies to induce CD4⁺ T cell apoptosis was related with the presence of monocytes. It is concluded that the further cross-linking of anti-CD4 antibodies is important for inducing CD4⁺ T cell apoptosis. This project was supported by grant from the National Sciences Foundation of China (No. 39370628).