改良M-K液中添加透明质酸钠对角膜保存时间影响的研究

Effects of sodium hyaluronate in reformed M-K liquid on prolonging duration of the preserved corneas

目的 探讨在改良M K液中加入透明质酸钠 (SH) ,对提高保存角膜质量和延长保存时间的作用。方法 参考M K液配方进行改良 ,自制中期保存液 (MMK液 ) ,另加入SH制成保存液Ⅰ (0 0 5 %SH)、Ⅱ (0 0 3 %SH)、Ⅲ (0 0 1%SH) ,对照组为MMK液 ,在保存 3、5、7、10d时 ,对保存兔角膜片行大体形态观察 ,台盼蓝 茜素红联合染色、SDH、G 6 P酶活性检测及超微结构观察。结果 各组在保存后不同时间点大体形态观察均有较明显差异 ;实验Ⅰ组 (0 0 5 %SH)与同期各组比较 ,其角膜片的透明度最好 ,水肿最轻。台盼蓝 茜素红染色活性内皮细胞百分率比较 ,实验Ⅰ组最高 ,对照组最低 ,各组间比较有显著差异 (P <0 0 1) ;SDH和G 6 P酶染色平均透光密度值比较 ,各组间有显著性差异 (P <0 0 1)。结论 在改良M K液中加入SH可延长角膜保存时间 ,保存效果与SH的浓度有关。

Objective To investigate the roles of sodium hyaluronate (SH) in the preservation of corneas. Methods Referred to M-K prescription Preserving liquid MMK was employed as the control. Different concentrations of SH added into the preserving liquid MMK were employed as the experiment groups: group Ⅰ (0.05% SH), group Ⅱ (0.03% SH), and group Ⅲ (0.01%). At 3, 5, 7, and 10 d after preservation in the preserving liquids, the ultrastuctures of the rabbit corneas were observed by scan electron microscopy and light microscopy, the corneas were stained by typan blue alizarin red staining, and the activities of SDH and G-6-P were detected by enzymohistochemistry. Results There was difference in macrostructure of the corneas in each group. Morphological changes in group Ⅰ were not obvious, but those in the control group were remarkable. Trypan blue-alizarin red staining indicated the highest vitality of corneal endothelial cells (CECs) in group Ⅰ, but the lowest in the control group. In addition, the activities of SDH and G-6-P in each group were significantly different. Conclusion The addition of SH in reformed M-K liquid can prolong the duration of the mid-term preserved corneas and the protective effect is in a dose-dependent manner.