AIM:To study the effect of salvianolate on tight junctions(TJs) and zonula occludens protein 1(ZO-1) in small intestinal mucosa of cirrhotic rats.METHODS:Cirrhosis was induced using carbon tetrachloride.Rats were rand...AIM:To study the effect of salvianolate on tight junctions(TJs) and zonula occludens protein 1(ZO-1) in small intestinal mucosa of cirrhotic rats.METHODS:Cirrhosis was induced using carbon tetrachloride.Rats were randomly divided into the untreated group,low-dose salvianolate(12 mg/kg) treatment group,medium-dose salvianolate(24 mg/kg) treatment group,and high-dose salvianolate(48 mg/kg) treatment group,and were treated for 2 wk.Another 10 healthy rats served as the normal control group.Histological changes in liver tissue samples were observed under a light microscope.We evaluated morphologic indices of ileal mucosa including intestinal villi width and thickness of mucosa and intestinal wall using a pathological image analysis system.Ultrastructural changes in small intestinal mucosa were investigated in the five groups using transmission electron microscopy.The changes in ZO-1 expression,a tight junction protein,were analyzed by immunocytochemistry.The staining index was calculated as the product of the staining intensity score and the proportion of positive cells.RESULTS:In the untreated group,hepatocytes showed a disordered arrangement,fatty degeneration was extensive,swelling was obvious,and disorganized lobules were divided by collagen fibers in hepatic tissue,which were partly improved in the salvianolate treated groups.In the untreated group,abundant lymphocytes infiltrated the fibrous tissue with proliferation of bile ducts,and collagen fibers gradually decreased and damaged hepatic lobules were partly repaired following salvianolate treatment.Compared with the untreated group,no differences in intestinal villi width between the five groups were observed.The villi height as well as mucosa and intestinal wall thickness gradually thickened with salvianolate treatment and were significantly shorter in the untreated group compared with those in the salvianolate treatment groups and normal group(P < 0.01).The number of microvilli decreased and showed irregular lengths and arrangements in the untreated group.The intercellular space between epithelial cells was wider.The TJs were discontinuous,which indicated disruption in TJ morphology in the untreated group.In the treated groups,the microvilli in the intestinal epithelium were regular and the TJs were gradually integrated and distinct.The expression of ZO-1 decreased in the small intestine of the untreated cirrhotic rats.The high expression rate of ZO-1 in ileal mucosa in the untreated group was significantly lower than that in the medium-dose salvianolate group(21.43% vs 64.29%,χ 2 = 5.25,P < 0.05),high-dose salvianolate group(21.43% vs 76.92%,χ 2 = 8.315,P < 0.01) and normal group(21.43% vs 90%,χ 2 = 10.98,P < 0.01).CONCLUSION:Salvianolate improves liver histopathological changes,repairs intestinal mucosa and TJ structure,and enhances ZO-1 expression in the small intestinal mucosa in cirrhotic rats.展开更多
目的探讨急性创伤性硬膜外血肿(ATEDH)清除术患者紧密连接蛋白1(ZO1)、中性粒细胞/淋巴细胞比值(NLR)、血小板反应蛋白-1(TSP-1)动态变化及对预后的预测价值。方法选取2017年4月—2020年4月行ATEDH清除术169例,根据术后3个月预后情况分...目的探讨急性创伤性硬膜外血肿(ATEDH)清除术患者紧密连接蛋白1(ZO1)、中性粒细胞/淋巴细胞比值(NLR)、血小板反应蛋白-1(TSP-1)动态变化及对预后的预测价值。方法选取2017年4月—2020年4月行ATEDH清除术169例,根据术后3个月预后情况分为良好组147例、不良组22例,比较两组术前、术后3和7 d ZO1、NLR、TSP-1、格拉斯哥昏迷量表(GCS)评分、美国国立卫生研究院卒中量表(NIHSS)评分,采用Pearson相关分析ZO1、NLR、TSP-1与GCS、NIHSS评分的关系,采用Cox回归模型分析影响预后的相关因素,采用受试者工作特征(ROC)曲线分析预测预后的价值。结果与良好组比较,不良组术后3和7 d ZO1、NLR、TSP-1及NIHSS评分升高,GCS评分降低(P<0.01)。术后3和7 d ZO1、NLR、TSP-1与GCS评分呈负相关,与NIHSS评分呈正相关(P<0.05,P<0.01)。术后3和7 d ZO1、NLR、TSP-1均为影响ATEDH清除术患者预后的相关因素(P<0.01)。术后7 d,三者联合预测患者预后的曲线下面积最大。结论ZO1、NLR、TSP-1与ATEDH清除术患者意识状态、神经功能损伤程度及预后有关,联合检测术后7 d ZO1、NLR、TSP-1对患者预后具有良好预测价值。展开更多
目的观察腺苷预处理对大鼠脑缺血再灌注后基质金属蛋白酶9(MMP-9)和闭锁连接蛋白1(ZO-1)表达变化的影响。方法108只健康雄性SD大鼠随机分为对照组、模型组、腺苷组(n=36)。造模前腺苷组腹腔注射腺苷注射液,对照组和模型组大鼠在相同时...目的观察腺苷预处理对大鼠脑缺血再灌注后基质金属蛋白酶9(MMP-9)和闭锁连接蛋白1(ZO-1)表达变化的影响。方法108只健康雄性SD大鼠随机分为对照组、模型组、腺苷组(n=36)。造模前腺苷组腹腔注射腺苷注射液,对照组和模型组大鼠在相同时间点腹腔注射2 ml生理盐水。采用改良的线栓法栓塞右侧大脑中动脉阻断血流2 h后,将线拔出形成再灌注。再灌注24 h后,伊文思蓝(EB)渗透法测定血脑屏障通透性,检测MMP-9和ZO-1表达。结果模型组和腺苷组EB,脑含水量,MMP-9明显高于对照组,ZO-1明显低于对照组(P<0.01);模型组和腺苷组MMP-9/β肌动蛋白(β-actin)表达明显高于对照组(0.563±0.054和0.377±0.080 vs 0.242±0.021,P<0.01),ZO-1/β-actin表达明显低于对照组(0.186±0.042和0.393±0.075 vs 0.671±0.065,P<0.01)。腺苷组MMP-9/β-actin表达低于模型组,ZO-1/β-actin表达明显高于模型组(P<0.01)。结论腺苷预处理可以通过抑制MMP-9表达,增加ZO-1表达,改善血脑屏障完整性,减轻脑水肿与脑缺血再灌注后的神经损伤。展开更多
基金Supported by Foundation of Chinese Medicine in Zhejiang Province Science and Technology,No.Z0102B002
文摘AIM:To study the effect of salvianolate on tight junctions(TJs) and zonula occludens protein 1(ZO-1) in small intestinal mucosa of cirrhotic rats.METHODS:Cirrhosis was induced using carbon tetrachloride.Rats were randomly divided into the untreated group,low-dose salvianolate(12 mg/kg) treatment group,medium-dose salvianolate(24 mg/kg) treatment group,and high-dose salvianolate(48 mg/kg) treatment group,and were treated for 2 wk.Another 10 healthy rats served as the normal control group.Histological changes in liver tissue samples were observed under a light microscope.We evaluated morphologic indices of ileal mucosa including intestinal villi width and thickness of mucosa and intestinal wall using a pathological image analysis system.Ultrastructural changes in small intestinal mucosa were investigated in the five groups using transmission electron microscopy.The changes in ZO-1 expression,a tight junction protein,were analyzed by immunocytochemistry.The staining index was calculated as the product of the staining intensity score and the proportion of positive cells.RESULTS:In the untreated group,hepatocytes showed a disordered arrangement,fatty degeneration was extensive,swelling was obvious,and disorganized lobules were divided by collagen fibers in hepatic tissue,which were partly improved in the salvianolate treated groups.In the untreated group,abundant lymphocytes infiltrated the fibrous tissue with proliferation of bile ducts,and collagen fibers gradually decreased and damaged hepatic lobules were partly repaired following salvianolate treatment.Compared with the untreated group,no differences in intestinal villi width between the five groups were observed.The villi height as well as mucosa and intestinal wall thickness gradually thickened with salvianolate treatment and were significantly shorter in the untreated group compared with those in the salvianolate treatment groups and normal group(P < 0.01).The number of microvilli decreased and showed irregular lengths and arrangements in the untreated group.The intercellular space between epithelial cells was wider.The TJs were discontinuous,which indicated disruption in TJ morphology in the untreated group.In the treated groups,the microvilli in the intestinal epithelium were regular and the TJs were gradually integrated and distinct.The expression of ZO-1 decreased in the small intestine of the untreated cirrhotic rats.The high expression rate of ZO-1 in ileal mucosa in the untreated group was significantly lower than that in the medium-dose salvianolate group(21.43% vs 64.29%,χ 2 = 5.25,P < 0.05),high-dose salvianolate group(21.43% vs 76.92%,χ 2 = 8.315,P < 0.01) and normal group(21.43% vs 90%,χ 2 = 10.98,P < 0.01).CONCLUSION:Salvianolate improves liver histopathological changes,repairs intestinal mucosa and TJ structure,and enhances ZO-1 expression in the small intestinal mucosa in cirrhotic rats.
文摘目的探讨急性创伤性硬膜外血肿(ATEDH)清除术患者紧密连接蛋白1(ZO1)、中性粒细胞/淋巴细胞比值(NLR)、血小板反应蛋白-1(TSP-1)动态变化及对预后的预测价值。方法选取2017年4月—2020年4月行ATEDH清除术169例,根据术后3个月预后情况分为良好组147例、不良组22例,比较两组术前、术后3和7 d ZO1、NLR、TSP-1、格拉斯哥昏迷量表(GCS)评分、美国国立卫生研究院卒中量表(NIHSS)评分,采用Pearson相关分析ZO1、NLR、TSP-1与GCS、NIHSS评分的关系,采用Cox回归模型分析影响预后的相关因素,采用受试者工作特征(ROC)曲线分析预测预后的价值。结果与良好组比较,不良组术后3和7 d ZO1、NLR、TSP-1及NIHSS评分升高,GCS评分降低(P<0.01)。术后3和7 d ZO1、NLR、TSP-1与GCS评分呈负相关,与NIHSS评分呈正相关(P<0.05,P<0.01)。术后3和7 d ZO1、NLR、TSP-1均为影响ATEDH清除术患者预后的相关因素(P<0.01)。术后7 d,三者联合预测患者预后的曲线下面积最大。结论ZO1、NLR、TSP-1与ATEDH清除术患者意识状态、神经功能损伤程度及预后有关,联合检测术后7 d ZO1、NLR、TSP-1对患者预后具有良好预测价值。
文摘目的观察腺苷预处理对大鼠脑缺血再灌注后基质金属蛋白酶9(MMP-9)和闭锁连接蛋白1(ZO-1)表达变化的影响。方法108只健康雄性SD大鼠随机分为对照组、模型组、腺苷组(n=36)。造模前腺苷组腹腔注射腺苷注射液,对照组和模型组大鼠在相同时间点腹腔注射2 ml生理盐水。采用改良的线栓法栓塞右侧大脑中动脉阻断血流2 h后,将线拔出形成再灌注。再灌注24 h后,伊文思蓝(EB)渗透法测定血脑屏障通透性,检测MMP-9和ZO-1表达。结果模型组和腺苷组EB,脑含水量,MMP-9明显高于对照组,ZO-1明显低于对照组(P<0.01);模型组和腺苷组MMP-9/β肌动蛋白(β-actin)表达明显高于对照组(0.563±0.054和0.377±0.080 vs 0.242±0.021,P<0.01),ZO-1/β-actin表达明显低于对照组(0.186±0.042和0.393±0.075 vs 0.671±0.065,P<0.01)。腺苷组MMP-9/β-actin表达低于模型组,ZO-1/β-actin表达明显高于模型组(P<0.01)。结论腺苷预处理可以通过抑制MMP-9表达,增加ZO-1表达,改善血脑屏障完整性,减轻脑水肿与脑缺血再灌注后的神经损伤。
