五指毛桃药物血清对老龄小鼠脾淋巴细胞氧化损伤的影响

摘要

Objective To study the effects of drug-containing serum of Ficus Hirta on oxidative damage of spleen lymphocyte due to aging in aged mice; To discuss its mechanism of action.Methods Forty aged mice were randomly divided into control group and high-, medium- and low-dose Ficus Hirta groups. Control group was given 0.9% sodium chloride solution for gavage, while high-, medium- and low-dose Ficus Hirta groups were given 6.6, 4.4, and 2.2 g/kg aqueous extract of Ficus Hirta for gavage. The spleen index was observed for optimum dose in aged mice. The optimum time and dilution of drug-containing serum of Ficus Hirta were confirmed by MTT method in lymphocyte proliferation test. The positive rate of senescent cells, the activity of T-SOD and the contents of MDA and ROS were determined in cellular antioxidant experiment after treated by optimal drug-containing serum for 48 h. Results Compared with the control group, the spleen index was significantly improved in high-, medium- and low-dose Ficus Hirta groups (P<0.05,P<0.01). 20% drug-containing serum of Ficus Hirta cultivated for 48 h had the best effects on lymphocyte proliferation in aged mice. 20% drug-containing serum of Ficus Hirta could significantly decrease the positive rate of senescent cells (P<0.01), improve T-SOD activity and decrease the contents of MDA and ROS (P<0.05,P<0.01).Conclusion The drug-containing serum of Ficus Hirta can improve the proliferative activity of spleen lymphocyte in aged mice and the mechanism of action may be involved in decreasing the positive rate of senescent cells and increasing antioxidant ability of lymphocyte.%目的：观察五指毛桃药物血清对老龄小鼠衰老所致脾淋巴细胞氧化损伤的影响，探讨其作用机制。方法将40只老龄小鼠随机分为空白对照组和五指毛桃高、中、低剂量组，分别给予0.9%氯化钠溶液和6.6、4.4、2.2 g/kg五指毛桃水提物灌胃，测定脾脏指数，确定五指毛桃水提物的最佳剂量，采用MTT法确定最佳剂量药物血清干预老龄小鼠脾淋巴细胞增殖的最佳稀释浓度及最佳作用时间。使用最佳稀释浓度药物血清作用老龄小鼠脾淋巴细胞48 h后观察衰老细胞阳性率，检测细胞内总超氧化物歧化酶（T-SOD）活性、丙二醛（MDA）和活性氧（ROS）含量。结果与空白对照组比较，药物组老龄小鼠脾脏指数均明显提高（P＜0.05，P＜0.01)，以中剂量组效果最佳；五指毛桃药物血清促进老龄小鼠脾淋巴细胞增殖的最佳浓度为20%，最佳作用时间为48 h。20%五指毛桃药物血清明显降低衰老细胞阳性率（P＜0.01)，提高老龄小鼠T-SOD活性，降低MDA和ROS含量（P＜0.05，P＜0.01）。结论五指毛桃药物血清能够提高老龄小鼠脾淋巴细胞增殖活性，其机制与降低衰老细胞阳性率、增强细胞抗氧化能力有关。