摘要
目的:探讨人参皂苷Rg1对小鼠慢性间歇性缺氧(CIH)诱导脑损伤的减轻作用,并阐明其可能的作用机制。方法:40只C57BL/6雄性小鼠随机分为对照组、模型组、抑制剂组(给予钙蛋白酶1抑制剂)、低剂量人参皂苷Rg1组(给予10 mg·kg^(-1)人参皂苷Rg1)和高剂量人参皂苷Rg1组(给予20 mg·kg^(-1)人参皂苷Rg1)。除对照组外,其余各组小鼠均置于自动调节氧浓度的低氧舱中以诱导小鼠缺氧性脑损伤。检测各组小鼠尾外周血氧饱和度(SpO_(2)),采用Morris水迷宫实验检测各组小鼠逃逸潜伏期、路径长度和游泳路线穿过目标象限频次,采用试剂盒检测血清中血尿素氮(BUN)、乳酸(LA)、丙二醛(MDA)、白细胞介素6 (IL-6)和肿瘤坏死因子α (TNF-α)水平以及血清中超氧化物歧化酶(SOD)和乳酸脱氢酶(LDH)活性,采用HE染色观察各组小鼠脑组织损伤程度,采用二氢乙啶(DHE)探针检测各组小鼠海马组织CA1区中活性氧(ROS)表达水平,采用Western blotting法检测各组小鼠脑组织中钙蛋白酶1、IL-6、和TNF-α蛋白表达水平。结果:与对照组比较,模型组小鼠SpO_(2)明显降低(P<0.01),表明模型建立成功。与模型组比较,抑制剂组和低及高剂量人参皂苷Rg1组小鼠SpO_(2)明显升高(P<0.01)。Morris水迷宫实验,与对照组比较,模型组小鼠逃逸潜伏期和路径长度明显延长(P<0.01),游泳路线穿过目标象限频次明显减少;与模型组比较,抑制剂组、低和高剂量人参皂苷Rg1组小鼠逃逸潜伏期和路径长度明显缩短,游泳路线穿过目标象限频次明显增多。与对照组比较,模型组小鼠血清中BUN、LA、MDA、IL-6和TNF-α水平明显升高(P<0.01),LDH活性明显升高(P<0.01),SOD活性明显降低(P<0.01);与模型组比较,抑制剂组、低和高剂量人参皂苷Rg1组小鼠血清中BUN、LA、MDA、IL-6和TNF-α水平明显降低(P<0.01),LDH活性明显降低(P<0.01),SOD活性明显升高(P<0.01)。HE染色,与对照组比较,模型组�
Objective:To discuss the alleviative effect of ginsenoside Rg1 on chronic intermittent hypoxia(CIH)-induced brain injury in the mice,and to clarify its possible mechanism.Methods:Forty male C57BL/6 mice were randomly divided into control group,model group,inhibitor group(treated with calpain-1 inhibitor),low dose of ginsenoside Rg1 group(treated with 10 mg·kg^(-1) ginsenoside Rg1),and high dose of ginsenoside Rg1 group(treated with 20 mg·kg^(-1) ginsenoside Rg1).Except for the control group,the mice in all other groups were placed in a hypoxic chamber with automatically regulated oxygen concentration to induce hypoxic brain injury.The peripheral blood oxygen saturation(SpO_(2))of tail of the mice in various groups was detected;the escape latencies and path lengths and the frequency of swimming route crossing the target quadrant of the mice in various groups were determined by Morris water maze test;the levels of blood urea nitrogen(BUN),lactate(LA),malondialdehyde(MDA),interleukin-6(IL-6),and tumor necrosis factor-α(TNF-α)and the activities of superoxide dismutase(SOD)and lactate dehydrogenase(LDH)in serum of the mice in various groups were detected by kits;the degrees of brain tissue injury of the mice in various groups were observed by HE staining.The levels of reactive oxygen species(ROS)in CA1 region of hippocampus tissue of the mice in various groups were detected by dihydroethidium(DHE)probe;the expression levels of calpain-1,IL-6,and TNF-αproteins in brain tissue of the mice in various groups were detected by Western blotting method.Results:Compared with control group,the SpO_(2) of the mice in model group was significantly decreased(P<0.01),indicating that the model was successfully established.Compared with model group,the SpO_(2) of the mice in inhibitor group,low dose of ginsenoside Rg1 group and high dose of ginsenoside Rg1 group were significantly increased(P<0.01).The Morris water maze test results showed that compared with control group,the escape latency and path length of the mice in model g
作者
孟岩
王洪新
杨育红
MENG Yan;WANG Hongxin;YANG Yuhong(Pharmacy Experimental Teaching Center,School of Pharmacy,Jinzhou Medical University,Jinzhou 121001,China;Liaoning Provincal Key Laboratory of Cardiovascular and Cerebrovascular Drugs,Jinzhou Medical University,Jinzhou 121001,China)
出处
《吉林大学学报（医学版）》
CAS
CSCD
北大核心
2024年第5期1196-1204,共9页
Journal of Jilin University：Medicine Edition
基金
国家自然科学基金项目(81973553)。
