High mobility group box chromosomal protein (HMGB1), an abundant eukaryotic nonhistone chromosomal protein, is previously known as a nuclear DNA-binding protein that stabilizes the structure and function of chromatin,...High mobility group box chromosomal protein (HMGB1), an abundant eukaryotic nonhistone chromosomal protein, is previously known as a nuclear DNA-binding protein that stabilizes the structure and function of chromatin, regulates gene transcription. Recent studies identify that extracellular HMGB1 as a late mediator of endotoxemia and sepsis.HMGB1 is released by activated macrophages,induces the release of other proinflammatory mediators,and mediates lethality when overexpressed. It may also be a key signal for eliciting immune responses to cellular injury and death.Moreover,the late kinetics of HMGB1,in compared with other proinflammatory cytokines such as TNF and IL-1,suggest that targeting HMGB1 may provide a wide and clinically accessible therapeutic window.Three independent strategies to inhibit HMGB1 release and action are now available:anti-HMGB1 antibodies,A box,and ethyl pyruvate. This review covers the general features of HMGB1 and progress in research on its newly role as a cytokine participating in the development of sepsis.展开更多
目的探讨血清高迁移率族蛋白B1(high mobility group box-1 protein,HMGB1)、白介素-6(IL-6)在脑梗死发病中的意义及其与脑梗死危险因素同型半胱氨酸、血脂、血糖、纤维蛋白原的相关性。方法筛选急性脑梗死患者40例,于病程第2、4、7、1...目的探讨血清高迁移率族蛋白B1(high mobility group box-1 protein,HMGB1)、白介素-6(IL-6)在脑梗死发病中的意义及其与脑梗死危险因素同型半胱氨酸、血脂、血糖、纤维蛋白原的相关性。方法筛选急性脑梗死患者40例,于病程第2、4、7、12天空腹抽取静脉血,健康对照组20例,危险因素组20例(均无急性脑血管病,但存在高血压、糖尿病、高脂血症等危险因素之一),空腹抽取静脉血。采用酶联免疫吸附试验分析HMGB1、IL-6水平,采用全自动分析仪检测同型半胱氨酸、血脂、血糖、纤维蛋白原含量。结果①脑梗死患者血清HMGB1水平病程第2、4、7、12天分别为(6.548±0.364)、(8.697±0.328)、(10.491±0.512)、(5.315±0.224)μg/L,显著高于健康对照组[(2.994±0.243)μg/L]及危险因素组[(3.272±0.285)μg/L,P<0.01],病程第4～7天达峰值。危险因素组与健康对照组比较无统计学意义(P=0.998)。②脑梗死患者血清IL-6水平病程第2、4、7天分别为(26.799±1.878)、(28.546±2.327)、(22.422±2.011)pg/ml,显著高于健康对照组[(13.275±1.214)pg/ml]及危险因素组[(15.186±1.325)pg/ml,P<0.01],病程第2～4天达峰值,脑梗死组病程第12天与危险因素组、健康对照组比较差异均无统计学意义(P>0.05)。③脑梗死患者血清HMGB1、IL-6水平与空腹血糖、糖化血红蛋白、餐后2 h血糖、同型半胱氨酸、纤维蛋白原呈显著正相关(P<0.05,P<0.01),与甘油三酯、极低密度脂蛋白、胆固醇、高密度脂蛋白、低密度脂蛋白无明显相关性(P>0.05)。血清HMGB1与IL-6水平明显相关(P<0.05)。结论血清炎症因子HMGB1、IL-6在脑梗死的发病中发挥重要作用,脑梗死后患者血清HMGB1水平达峰值时间晚于IL-6,持续时间长于IL-6,两者与血糖、同型半胱氨酸、纤维蛋白原等危险因素均有明显相关性。展开更多
文摘骨关节炎(osteoarthritis,OA)是一种慢性退行性关节疾病,其主要特征是关节软骨破坏,导致患者身体疼痛和残疾,严重影响其生活质量。OA可由多种病因诱发,而关节软骨的病理改变被认为是OA发生的关键驱动因素之一。高迁移率族蛋白1(high mobility group box-1 protein,HMGB1)作为一种真核细胞内的非组蛋白,可参与调节软骨细胞炎症及凋亡过程,从而导致关节软骨受损,诱发OA。本文就HMGB1在OA软骨细胞中的作用机制进行综述,以期为临床防治OA提供新思路。
文摘High mobility group box chromosomal protein (HMGB1), an abundant eukaryotic nonhistone chromosomal protein, is previously known as a nuclear DNA-binding protein that stabilizes the structure and function of chromatin, regulates gene transcription. Recent studies identify that extracellular HMGB1 as a late mediator of endotoxemia and sepsis.HMGB1 is released by activated macrophages,induces the release of other proinflammatory mediators,and mediates lethality when overexpressed. It may also be a key signal for eliciting immune responses to cellular injury and death.Moreover,the late kinetics of HMGB1,in compared with other proinflammatory cytokines such as TNF and IL-1,suggest that targeting HMGB1 may provide a wide and clinically accessible therapeutic window.Three independent strategies to inhibit HMGB1 release and action are now available:anti-HMGB1 antibodies,A box,and ethyl pyruvate. This review covers the general features of HMGB1 and progress in research on its newly role as a cytokine participating in the development of sepsis.
文摘目的:观察白芍总苷(TGP)对非酒精性脂肪性肝病(NAFLD)大鼠高迁移率族蛋白1(HMGB1)、晚期糖基化终产物受体(RAGE)通路的调控作用。方法:用高脂-高果糖餐诱导NAFLD大鼠模型,将模型大鼠随机分为模型组,TGP高、低剂量组(200、100 mg·kg^(-1)·d^(-1)),二甲双胍组(200 mg·kg^(-1)·d^(-1)),水飞蓟宾组(200 mg·kg^(-1)·d^(-1)),并另设正常对照组。用药6周后观察各组大鼠胆固醇(TC)、低密度脂蛋白胆固醇(LDL-C)、高密度脂蛋白胆固醇(HDL-C)、甘油三酯(TG)、游离脂肪酸(FFA)、丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)、空腹血糖(FBG)、餐后2 h血糖(2 h BG)、胰岛素(Fins)水平,计算胰岛素抵抗指数(HOMA-IR)和肝脏指数。Western blot方法检测肝组织中HMGB1、RAGE蛋白活性。结果:与模型组比较,TGP高、低剂量组LDL-C、TG、TC、FFA、ALT、AST、2 h BG、Fins、HOMA-IR均明显降低(P<0.01或P<0.05),高、低剂量TGP在拮抗胰岛素抵抗、降糖降脂、改善肝功能方面有较显著的作用,TGP高、低剂量组均可下调HMGB1(P<0.01)和RAGE(P<0.05)蛋白的表达。结论:TGP通过抑制HMGB1、RAGE信号通路的转导而起到改善NAFLD大鼠的糖脂代谢异常,拮抗胰岛素抵抗,改善肝功能的作用。
