珍珠水解液对肝窦内皮细胞活力及肝窦毛细血管化的干预作用

Effects of Pearl Hydrolysate on Hepatic Sinusoidal Endothelial Cell Viability and Capillarization in Liver Fibrosis

目的探讨珍珠水解液对肝纤维化时肝窦毛细血管化病变的干预作用及机制。方法合浦珍珠水解液与肝窦内皮细胞(HSEC)和肝星状细胞(HSC-LX2)共同孵育,采用MTT比色法测定HSEC和HSC-LX2的细胞增殖抑制率,流式细胞术测定HSC-LX2的细胞周期及细胞凋亡情况,透射电镜观察HSEC的窗孔及基底膜等微结构的变化情况。结果瘦素激活后,HSC-LX2细胞活性显著增高(P=0.041),HSEC则出现细胞活性显著降低(P=0.004)、窗孔数量减少、窗孔直径下降、连续基底膜形成等肝窦毛细血管化现象。瘦素干预后给予低、中、高不同浓度珍珠水解液治疗,各浓度组均可使缩小及消失了的HSEC窗孔发生增多和扩大(低浓度组:P=0.020;中浓度组:P=0.028;高浓度组:P=0.032),使HSEC外成片的基膜变得稀薄甚至消失(低浓度组:P=0.020;中浓度组:P=0.028;高浓度组:P=0.032);使活化的HSC-LX2活力下降(低浓度组:P=0.018;中浓度组:P=0.013;高浓度组:P=0.009),并诱导其发生细胞凋亡(低浓度组:P=0.012;中浓度组:P=0.006;高浓度组:P=0.005)。随着珍珠水解液给药浓度上升,干预肝窦毛细血管化的效果有梯度增高,具有剂量依赖性(低浓度组:P=0.020;中浓度组:P=0.028;高浓度组:P=0.032)。高浓度珍珠水解液干预肝窦毛细血管化的效果强于治疗剂量的秋水仙碱(P=0.034)和丹参酚酸B(P=0.038)。结论合浦珍珠水解液可使HSEC细胞的活性增加、窗孔面积恢复、基底膜消失,使激活的HSC-LX2细胞丧失活力并发生凋亡,具有针对HSEC及HSC-LX2的显著的抗肝窦毛细血管化药理学作用。

Objective To study the effect and mechanism of pearl hydrolysate on hepatic sinusoidal capillarization in liver fibrosis.Methods Hepatic sinusoidal endothelial cells(HSEC)and hepatic stellate cells(HSC-LX2)were incubated with Hepu pearl hydrolysate.The proliferation of HSEC and HSC-LX2 was examined by MTT colorimetry.The cell cycle and apoptosis of HSC-LX2 were measured by flow cytometry.The changes of the microstructures such as fenestra and basement membrane of HSEC were observed by transmission electron microscopy.Results The intervention with leptin increased the viability of HSC-LX2(P=0.041),decreased the viability of HSEC(P=0.004),and caused capillarization signs such as decreased number and diameter of fenestrae and formation of continuous basement membrane.The treatment with pearl hydrolysate at different doses increased and expanded the fenestrae of HSEC(low dose:P=0.020;medium dose:P=0.028;high dose:P=0.032),disintegrated the extracellular basement membrane of HSEC(low dose:P=0.020;medium dose:P=0.028;high dose:P=0.032),decreased the viability of HSC-LX2(low dose:P=0.018;medium dose:P=0.013;high dose:P=0.009),and induced the apoptosis of HSC-LX2(low dose:P=0.012;medium dose:P=0.006;high dose:P=0.005).Pearl hydrolysate exerted therapeutic effect on capillarization in a dose-dependent manner(low dose:P=0.020;medium dose:P=0.028;high dose:P=0.032).Moreover,high-dose pearl hydrolysate showed stronger effect on capillarization of hepatic sinuses than colchicine(P=0.034)and salvianolic acid B(P=0.038).Conclusion Hepu pearl hydrolysate can increase the viability of HSEC,restore the area of fenestrae,disintegrate the basement membrane,and decrease the viability and induce the apoptosis of HSC-LX2,demonstrating significant pharmacological effects on the capillarization of HSEC and HSC-LX2.