摘要:
目的 观察大豆皂苷对重症中暑大鼠炎症因子水平、抗氧化活性及运动能力的影响.方法 将80只雄性SD大鼠按随机数字表法分为正常对照组、热打击模型组、生理盐水对照组和大豆皂苷组,剔除实验过程中死亡及直肠温度(Tc)<41 °C的大鼠,最终纳入54只,每组18只.将大鼠置于30 °C仿真热气候动物舱,30 min内将舱内温度升至39 °C,湿度65% ;同时进行跑台运动,跑步速度设置为15 m/min,坡度为0°,每次8 min,间隔2 min,时间为90 min的状态下复制热打击大鼠模型.正常对照组大鼠饲养于温度23~25 °C,相对湿度为50%~70%环境中.制模后,生理盐水对照组和大豆皂苷组每日灌胃生理盐水及大豆皂苷(10 mg/kg),连续3个月;热打击模型组不给予任何处理.于大鼠出舱24 h后取股动脉血,采用酶联免疫吸附试验(ELISA)检测血清白细胞介素(IL-6、IL-1β)、肿瘤坏死因子-α(TNF-α)、γ-干扰素(IFN-γ)、丙二醛(MDA)、超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)水平;采用自动生化分析仪检测血清血红蛋白(Hb)、尿素(BUN)、乳酸脱氢酶(LDH)、血乳酸(Lac)含量.结果 热打击模型组IL-6、IL-1β、TNF-α、IFN-γ、MDA、Hb、BUN、LDH、Lac均较正常对照组明显升高〔IL-6(ng/L):86.17±4.82比 12.60±3.49,IL-1β(ng/L):83.00±5.98 比 15.70±3.64,TNF-α(ng/L):72.22±6.93 比 13.75±2.69, IFN-γ(ng/L):36.22±3.02比7.35±1.60,MDA(nmol/mg):19.78±4.56比6.40±1.35,Hb(g/L):136.22±1.93比 126.75±5.84,BUN(mmol/L):21.06±3.44 比 5.65±1.35,LDH(μmoL·s-1·L-1):9.65±0.83 比 2.12±0.17, Lac(mmol/L):552.56±78.33比1.32±0.18,均P<0.05〕,SOD、GSH-Px均较正常对照组明显降低〔SOD(kU/L):97.89±10.57比126.65±11.35,GSH-Px (kU/L):19.22±2.58比43.45±4.02〕;但大豆皂苷组IL-6、IL-1β、TNF-α、IFN-γ、MDA、BUN、LDH、Lac较热打击模型组明显降低〔IL-6(ng/L):45.28±3.54比86.17±4.82, IL-1β(ng/L):41.61±2.93 比 83.00±5.98,TNF-α(ng/L):37.22±2.46 比 72.22±6.93,IFN-γ(ng/L):19.22±2.60 比 36.22±3.02,MDA(nmol/mg):11.28±1.74 比 19.78±4.56,BUN(mmol/L):11.78±2.13 比21.06±3.44,LDH(μmoL·s-1·L-1):3.70±0.26比9.65±0.83,Lac(mmol/L):274.56±59.08 比552.56±78.33,均P<0.01〕,SOD、GSH-Px、Hb较热打击模型组明显升高〔SOD(kU/L):116.11±11.28比97.89±10.57, GSH-Px(kU/L):31.17±2.90比19.22±2.58,Hb(g/L):141.33±3.79比136.22±1.93,均P<0.01〕;热打击模型组与生理盐水对照组上述指标比较差异均无统计学意义(均P>0.05).结论 热打击和运动处理后,大鼠血清炎症因子产生和释放增加,脂质过氧化水提高.大豆皂苷可通过减少重症中暑大鼠血清炎症因子的产生和释放,降低脂质过氧化水平,达到提高机体承受热打击和高强度运动能力的目的.%Objective To observe the effects of Soyasaponins on inflammatory factors, antioxidant activity and exercise ability in rats with severe heat stroke. Methods Eighty male Sprague-Dawley (SD) rats were randomly divided into normal control group, heat shock model group, saline control group and Soyasaponin group, The rats that died during the experiment or with a low rectal temperature ( 0.05). Conclusion After heat shock and exercise management, the production and release of inflammatory factors are increased, and the level of lipid peroxidation was elevated in rats. The Soyasaponin can improve the ability to withstand heat shock and strong exercise by reducing the production and release of inflammatory factors and lipid peroxidation in the rats with severe heatstroke.