目的探讨美沙拉嗪对溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织TLR4表达的影响。方法选取30只SD大鼠随机分为正常对照组、UC组及治疗组。后两组均采用三硝基苯磺酸(TNBS)诱导制备UC大鼠模型。成功建模2 d后,治疗组采用美沙拉嗪+...目的探讨美沙拉嗪对溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织TLR4表达的影响。方法选取30只SD大鼠随机分为正常对照组、UC组及治疗组。后两组均采用三硝基苯磺酸(TNBS)诱导制备UC大鼠模型。成功建模2 d后,治疗组采用美沙拉嗪+蒸馏水混悬液3 ml灌胃,正常对照组、UC组仅用单纯蒸馏水3 ml灌胃,连续灌注14 d后,处死三组大鼠,对三组大鼠的疾病活动指数、肠黏膜及组织学损伤进行评估,RT-PCR反应测定结肠组织TLR4 m RNA的表达;蛋白质印迹法测定TLR4蛋白的表达。结果 UC组大鼠疾病活动指数、肠黏膜及组织学损伤评分均显著高于正常对照组和治疗组(P<0.05)。UC组及治疗组大鼠结肠组织TLR4 m RNA及蛋白表达水平显著高于正常对照组(P<0.05)。与UC组比较,治疗组大鼠结肠组织TLR4 m RNA及蛋白表达均显著降低,差异有统计学意义(P<0.05)。结论美沙拉嗪对UC大鼠结肠组织TLR4表达有抑制作用,可有效减少肠组织TLR4 m RNA的表达,缓解UC大鼠结肠组织损伤,有效保护UC大鼠结肠组织黏膜。展开更多
目的探讨蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后高迁移率族蛋白1(high mobility group protein B1,HMGB1)在血清及出血浸润脑组织内的动态表达规律。方法采用大鼠大脑前动脉穿刺法建立SAH模型,并随机分为6h、1d、3d、7d组,并...目的探讨蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后高迁移率族蛋白1(high mobility group protein B1,HMGB1)在血清及出血浸润脑组织内的动态表达规律。方法采用大鼠大脑前动脉穿刺法建立SAH模型,并随机分为6h、1d、3d、7d组,并设对照组。运用ELISA法测定SAH后血清中HMGB1的水平,免疫组化观察脑组织HMGB1的表达及分布,Western blot测定出血浸润区域脑组织(额底皮层)HMGB1含量。结果 SAH后血清中HMGB1水平从6h开始显著升高,并持续升高至术后7d;免疫组化结果显示,SAH后早期(6h、1d)脑组织内HMGB1表达明显减少,至晚期(3、7d)时间点其表达显著升高,并向胞质扩散;Western blot结果提示,SAH后额底皮层HMGB1呈明显早期减少、晚期升高的趋势。结论 SAH后脑组织中HMGB1水平呈早期降低、晚期升高的趋势,同时血清中HMGB1持续升高,HMGB1可能参与了SAH后脑组织的炎性损伤。展开更多
Twelve healthy rats were divided into the T-2 toxin group receiving gavage of 1 mg/kg T-2 toxin and the control group receiving gavage of normal saline. Total relative concentrations of T-2 toxin and HT-2 toxin in the...Twelve healthy rats were divided into the T-2 toxin group receiving gavage of 1 mg/kg T-2 toxin and the control group receiving gavage of normal saline. Total relative concentrations of T-2 toxin and HT-2 toxin in the skeletal system（thighbone, knee joints, and costal cartilage） were significantly higher than those in the heart, liver, and kidneys（P 〈 0.05）. The relative concentrations of T-2 toxin and HT-2 toxin in the skeletal system（thighbone and costal cartilage） were also significantly higher than those in the heart, liver, and kidneys. The rats administered T-2 toxin showed rapid metabolism compared with that in rats administered HT-2 toxin, and the metabolic conversion rates in the different tissues were 68.20%-90.70%.展开更多
文摘目的探讨美沙拉嗪对溃疡性结肠炎(ulcerative colitis,UC)大鼠结肠组织TLR4表达的影响。方法选取30只SD大鼠随机分为正常对照组、UC组及治疗组。后两组均采用三硝基苯磺酸(TNBS)诱导制备UC大鼠模型。成功建模2 d后,治疗组采用美沙拉嗪+蒸馏水混悬液3 ml灌胃,正常对照组、UC组仅用单纯蒸馏水3 ml灌胃,连续灌注14 d后,处死三组大鼠,对三组大鼠的疾病活动指数、肠黏膜及组织学损伤进行评估,RT-PCR反应测定结肠组织TLR4 m RNA的表达;蛋白质印迹法测定TLR4蛋白的表达。结果 UC组大鼠疾病活动指数、肠黏膜及组织学损伤评分均显著高于正常对照组和治疗组(P<0.05)。UC组及治疗组大鼠结肠组织TLR4 m RNA及蛋白表达水平显著高于正常对照组(P<0.05)。与UC组比较,治疗组大鼠结肠组织TLR4 m RNA及蛋白表达均显著降低,差异有统计学意义(P<0.05)。结论美沙拉嗪对UC大鼠结肠组织TLR4表达有抑制作用,可有效减少肠组织TLR4 m RNA的表达,缓解UC大鼠结肠组织损伤,有效保护UC大鼠结肠组织黏膜。
文摘目的探讨蛛网膜下腔出血(subarachnoid hemorrhage,SAH)后高迁移率族蛋白1(high mobility group protein B1,HMGB1)在血清及出血浸润脑组织内的动态表达规律。方法采用大鼠大脑前动脉穿刺法建立SAH模型,并随机分为6h、1d、3d、7d组,并设对照组。运用ELISA法测定SAH后血清中HMGB1的水平,免疫组化观察脑组织HMGB1的表达及分布,Western blot测定出血浸润区域脑组织(额底皮层)HMGB1含量。结果 SAH后血清中HMGB1水平从6h开始显著升高,并持续升高至术后7d;免疫组化结果显示,SAH后早期(6h、1d)脑组织内HMGB1表达明显减少,至晚期(3、7d)时间点其表达显著升高,并向胞质扩散;Western blot结果提示,SAH后额底皮层HMGB1呈明显早期减少、晚期升高的趋势。结论 SAH后脑组织中HMGB1水平呈早期降低、晚期升高的趋势,同时血清中HMGB1持续升高,HMGB1可能参与了SAH后脑组织的炎性损伤。
基金partially supported by National Natural Scientific Foundation of China[81620108026,81302393]
文摘Twelve healthy rats were divided into the T-2 toxin group receiving gavage of 1 mg/kg T-2 toxin and the control group receiving gavage of normal saline. Total relative concentrations of T-2 toxin and HT-2 toxin in the skeletal system（thighbone, knee joints, and costal cartilage） were significantly higher than those in the heart, liver, and kidneys（P 〈 0.05）. The relative concentrations of T-2 toxin and HT-2 toxin in the skeletal system（thighbone and costal cartilage） were also significantly higher than those in the heart, liver, and kidneys. The rats administered T-2 toxin showed rapid metabolism compared with that in rats administered HT-2 toxin, and the metabolic conversion rates in the different tissues were 68.20%-90.70%.
