人参二醇皂苷对小鼠颈椎稳定性异常致脑功能损伤的影响

目的观察人参二醇皂苷（PDS）对小鼠颈椎稳定性异常引起智力下降和脑组织损伤的影响。方法44只小鼠随机分为正常对照组、模型组、PDS高剂量组和低剂量组各11只，手术制备小鼠颈椎失稳模型，PDS腹腔注射（高剂量组：14mg/kg；低剂量组：7mg/kg）50d，采用水迷宫、跳台实验方法检测小鼠学习记忆能力；用试剂盒检测脑组织超氧化物岐化酶（SOD）、乳酸脱氢酶（LDH）活性和丙二醛（MDA）、一氧化氮（NO）含量。结果水迷宫实验：与模型组比较，PDS高剂量组小鼠游全程时间缩短、错误次数减少（P〈0.05）；跳台实验：与模型组比较，PDS高剂量组小鼠反应期明显缩短、错误次数明显减少（P〈0.01）；PDS组小鼠脑组织SOD、LDH活性明显增强（P〈0.01），MDA、NO含量降低（P〈0.01，P〈0.05）。结论人参二醇皂苷对小鼠颈椎稳定性异常引起的学习记忆能力下降和脑损伤具有一定的改善和保护作用。

Effect of Panaxadiol Saponins on Cerebral Functional Lesion Induced by Destabilization of Cervical Vertebra in Mice

Objective To observe the effect of panaxadiol saponins (PDS) on intellectual decline and cerebral lesion induced by destabilization of cervical vertebra in mice.Methods44 mice were randomly divided into the normal control group, model group, high PDS doses group and low PDS doses group with 11 animals in each group. The model of destabilization of cervical vertebra was established by operating and intraperitoneal injection of PDS performed in the PDS high doses group (14 mg/kg) and low doses group (7 mg/kg) once everyday for 50 days. The memory ability of mice was evaluated by the water-maze test and tittup platform experiment. 50 days later, all mice were executed and the activities of superoxide dismutase (SOD), lactic dehydrogenase (LDH) and the content of maleic dialdehyde (MDA), nitric oxide (NO) in encephalon were tested.ResultsIn the PDS groups, the incubation period and error times in water-maze test shortened significantly ( P<0.05), aod the reaction period in tittup platform experiment shortened and wrong times decreased obviously ( P<0.01) compared with the model group. The activities of SOD, LDH increased ( P<0.01), and the content of MDA and NO decreased ( P<0.01, P<0.05) in the PDS group compared with the model group.ConclusionPDS has certain protective and improving effect on the decline of memory ability and cerebral lesion induced by destabilization of cervical vertebra in mice.