FMLP诱导的嗜中性白细胞呼吸爆发与凋亡的关系研究

The relationship between fMLP induced neutrophil respiratory burst and the apoptosis of neutrophil]

The relationship between apoptosis of neutrophils and the change of their intracellular free Ca2+ concentration [Ca2+]i was studied. FMLP and A23187 were used to elevate the [Ca2+]i while BAPTA was used to deplete it. Fluorescence microscope, flow cytometry and gel electrophoresis were used to study the percentage of cell apoptosis and the change of f-actin during apoptosis. The results showed that the apoptosis was obviously inhibited by fMLP and A23187, while accelerated by BAPTA. The detection of f-actin showed that the f-actin depolymerized obviously during apoptosis. The elevation of [Ca2+]i inhibit the actin depolymerization while depletion of [Ca2+]i accelerated it. This result indicated that the apoptosis of neutrophil was obviously inhibited by [Ca2+]i elevation but accelerated by [Ca2+]i depletion.