应用原子力显微镜(atomic force microscopy,AFM)探测了静息、脂多糖(LPS)或伴刀豆蛋白(ConA)活化的人外周血淋巴细胞的形态结构、超微结构及粘滞力特性。从AFM图像可知,经LPS或ConA刺激活化后的淋巴细胞比静息状态的淋巴细胞有所增大,并且表面分布着大小不一的颗粒状聚合物。利用AFM高空间分辨的力位移曲线测量系统,发现经LPS或ConA刺激活化后淋巴细胞的粘滞力是静息状态淋巴细胞的2~3倍。通过AFM探测淋巴细胞活化状态的可视化数据,可以更好地理解淋巴细胞的行为。
The characteristics of the morphology, ultra-microstructure and adhesion force of the human periphery lymphocyte activated by resting, lipopolysaccharide (LPS) or concanavalin A (ConA) were investigated using atomic force microscopy (AFM). The AFM images revealed that the surface of the lymphocyte activated by LPS or ConA was rougher than that of resting lymphocyte, and was coated with different grain sizes of polymers. Spatially resolved force-distance curves indicated that the adhesion force values of lymphocyte activated by LPS or ConA were approximately two to three times stronger than that of resting lymphocyte. The visualized data obtained from AFM for lymphocyte can provide a better understanding of the behavior of lymphocyte.