隐丹参酮与多奈哌齐合用对β-淀粉样蛋白诱导SH-SY5Y细胞凋亡的保护作用

Protective effect of combination of cryptotanshinone and donepezil on amyloid-β protein induced apoptosis in SH-SY5Ycells

目的观察隐丹参酮(CTS)与多奈哌齐(DON)合用对β-淀粉样蛋白(Aβ)损伤SH-SY5Y细胞的保护作用,并探讨其可能的机制。方法体外培养SH-SY5Y细胞,建立阿尔茨海默病(AD)细胞模型,采用MTT法检测细胞存活率,Hoechst荧光染色检测细胞凋亡,Western blot检测Bcl-2和Bax的表达。结果 CTS、DON及联合用药均能明显减轻Aβ对SH-SY5Y细胞的损伤,提高细胞的存活率,显著上调Bc1-2蛋白表达,减少Bax蛋白表达,抑制细胞凋亡。CTS与DON合用其抑制细胞凋亡的效果显著强于CTS与DON单用,差异有统计学意义(P<0.05)。结论 CTS与DON合用对Aβ损伤SH-SY5Y细胞有协同保护作用,其机制可能与协同调节凋亡相关基因Bcl-2蛋白家族的表达有关。

Objective To investigate the relationship between aggrecan and YKL-40 in knee articular cartilage of Sprague-Daw-lay（SD） rats with osteoarthritis （OA） .Methods Fifty-six healthy SD rats were randomly divided into 7 groups ,8 cases per group . The one side of knee joint was randomly selected for performing the anterior cruciate ligment transection （ACLT） and establishing the OA model .The rats in one group were randomly killed on the day of operation and at postoperative 0 ,2 ,4 ,8 ,12 ,16 ,20 weeks . The femoral condyle cartilage samples at different time periods in the operated side were collected for conducting safranin O /fast green staining and HE staining .Meanwhile ,the OA pathological grade was made out according to the modified Mankin scale .The expression of aggrecan and YKL-40 in the cartilage with different stages of OA were analyzed by the immunohistochemistry meth-od ,and the status of expression were measured by average optical density （AOD） .The correlation between aggrecan and YKL-40 was analyzed .Results With the aggravation of OA ,the expression of aggrecan was gradually reduced and the expression of YKL-40 was gradually increased .The differences during the early ,middle and late phases of OA had statistical significance （P＆lt;0 .05） . The expression of aggrecan was negatively correlated with the expression of YKL-40（P＆lt;0 .05） .Conclusion The level of aggrecan is gradually reduced with the aggravation of OA .Aggrecan is negatively correlated with the YKL-40 level ,which may reflect the dedifferentiation degree of joint chondrocyte to some extent .