高迁移率族蛋白B1(high mobility group protein B1,HMGB1)为主要存在于细胞核中与DNA结合的一种非组蛋白,具有多种核内功能。近年诸多研究发现,细胞外HMGB1作为一种重要的晚期炎性递质参与炎症免疫反应和肿瘤的生长、浸润、转移。HMGB...高迁移率族蛋白B1(high mobility group protein B1,HMGB1)为主要存在于细胞核中与DNA结合的一种非组蛋白,具有多种核内功能。近年诸多研究发现,细胞外HMGB1作为一种重要的晚期炎性递质参与炎症免疫反应和肿瘤的生长、浸润、转移。HMGB1通过活化细胞的主动分泌和坏死损伤细胞的被动释放而进入细胞外,细胞外HMGB1可诱导单核/巨噬细胞、中性粒细胞、树突状细胞等表达分泌多种炎性递质。细胞外HMGB1与晚期糖基化终末产物受体、Toll样受体2、Toll样受体4等胞膜受体结合,激活丝裂原活化蛋白激酶、Janus激酶/信号转导和转录激活子、核转录因子-κB等信号转导通路而发挥其生物学效应。HMGB1靶向治疗将可能为炎症、癌症、氧化应激、无菌损伤等疾病开辟一个新的治疗途径。文中就HMGB1的结构和功能、细胞外分泌和释放、信号传导机制的研究进展作一综述。展开更多
The loss of endothelial connective integrity and endothelial barrier dysfunction can lead to increased vascular injury, which is related to the activation of endothelial inflammasomes. There are evidences that low con...The loss of endothelial connective integrity and endothelial barrier dysfunction can lead to increased vascular injury, which is related to the activation of endothelial inflammasomes. There are evidences that low concentrations of aspirin can effectively prevent cardiovascular diseases. We hypothesized that low-dose aspirin could ameliorate endothelial injury by inhibiting the activation of NLRP3 inflammasomes and ultimately prevent cardiovascular diseases. Microvascular endothelial cells were stimulated by lipopolysaccharide(2 μg/mL) and administrated by 0.1–2 mmol/L aspirin. The wild type mice were stimulated with LPS(100 μg/kg/day), and 1 h later treated with aspirin(12.5, 62.5, or125 mg/kg/day) and dexamethasone(0.0182 mg/kg/day) for 7 days. Plasma and heart were harvested for measurement of ELISA and immunofluorescence analyses. We found that aspirin could inhibit NLRP3 inflammasome formation and activation in vitro in dose-dependent manner and has correlation between the NLRP3 inflammasome and the ROS/TXNIP pathway. We also found that low-concentration aspirin could inhibit the formation and activation of NLRP3 inflammasome and restore the expression of theendothelial tight junction protein zonula occludens-1/2(ZO1/2). We assume that aspirin can ameliorate the endothelial layer dysfunction by suppressing the activation of NLRP3 inflammasome.展开更多
文摘高迁移率族蛋白B1(high mobility group protein B1,HMGB1)为主要存在于细胞核中与DNA结合的一种非组蛋白,具有多种核内功能。近年诸多研究发现,细胞外HMGB1作为一种重要的晚期炎性递质参与炎症免疫反应和肿瘤的生长、浸润、转移。HMGB1通过活化细胞的主动分泌和坏死损伤细胞的被动释放而进入细胞外,细胞外HMGB1可诱导单核/巨噬细胞、中性粒细胞、树突状细胞等表达分泌多种炎性递质。细胞外HMGB1与晚期糖基化终末产物受体、Toll样受体2、Toll样受体4等胞膜受体结合,激活丝裂原活化蛋白激酶、Janus激酶/信号转导和转录激活子、核转录因子-κB等信号转导通路而发挥其生物学效应。HMGB1靶向治疗将可能为炎症、癌症、氧化应激、无菌损伤等疾病开辟一个新的治疗途径。文中就HMGB1的结构和功能、细胞外分泌和释放、信号传导机制的研究进展作一综述。
基金supported by the National Key Research and Development Program of China(No.2017YFC1700400)National Natural Science Foundation of China(Nos.81603587 and 81603668)+4 种基金Guangdong Natural Science Funds for Distinguished Young Scholar(No.2018B030306027,China)Science and Technology Development Plan of Guangdong Province(2017A020211016,China)Science&Technology Award for Young-Aged Talents of China Association of Traditional Chinese Medicine(No.CACM-2017-QNRC2-C12)the National Institutes of Health of USA(No.HL122769)Project of Guangzhou University of Chinese Medicine(No.A1-AFD018171Z11020,China)
文摘The loss of endothelial connective integrity and endothelial barrier dysfunction can lead to increased vascular injury, which is related to the activation of endothelial inflammasomes. There are evidences that low concentrations of aspirin can effectively prevent cardiovascular diseases. We hypothesized that low-dose aspirin could ameliorate endothelial injury by inhibiting the activation of NLRP3 inflammasomes and ultimately prevent cardiovascular diseases. Microvascular endothelial cells were stimulated by lipopolysaccharide(2 μg/mL) and administrated by 0.1–2 mmol/L aspirin. The wild type mice were stimulated with LPS(100 μg/kg/day), and 1 h later treated with aspirin(12.5, 62.5, or125 mg/kg/day) and dexamethasone(0.0182 mg/kg/day) for 7 days. Plasma and heart were harvested for measurement of ELISA and immunofluorescence analyses. We found that aspirin could inhibit NLRP3 inflammasome formation and activation in vitro in dose-dependent manner and has correlation between the NLRP3 inflammasome and the ROS/TXNIP pathway. We also found that low-concentration aspirin could inhibit the formation and activation of NLRP3 inflammasome and restore the expression of theendothelial tight junction protein zonula occludens-1/2(ZO1/2). We assume that aspirin can ameliorate the endothelial layer dysfunction by suppressing the activation of NLRP3 inflammasome.
