BACKGROUND Tacrolimus(FK506)is a key calcineurin inhibitor used to prevent organ transplant rejection and is effective in improving graft survival.However,it is linked to hyperglycemia and insulin resistance,contribut...BACKGROUND Tacrolimus(FK506)is a key calcineurin inhibitor used to prevent organ transplant rejection and is effective in improving graft survival.However,it is linked to hyperglycemia and insulin resistance,contributing to new-onset diabetes after transplantation and negatively affecting islet function.AIM To study the effects of tacrolimus on the insulin signaling pathway of hepatocytes.METHODS HL7702 cells were treated with different concentrations of tacrolimus(0.1 mg/L,1 mg/L,5 mg/L)for 24 hours.The proteins involved in insulin signaling were detected by Western blotting.RESULTS Compared with the control group,phosphorylation of insulin receptor substrate(IRS)1 at Ser 307 and Ser 323 were increased significantly when the tacrolimus concentration reached 1 and 5 mg/L.Phosphorylation of IRS1 at Ser 1101 was also increased,although not significantly.However,phosphorylation of Ribosomal protein S6 kinase beta-1 at Thr 389 was decreased significantly.The levels of phosphorylated glycogen synthase kinase 3αSer 21 and Ser 9 were increased.Surprisingly,phosphorylation of glycogen synthase at Ser 641 was increased.There was no significant change in the activity of glycogen phosphorylase.CONCLUSION Tacrolimus has no direct effect on hepatic glucose metabolism,but inhibits IRS1-mediated insulin signaling.This may be one of the underlying mechanisms by which tacrolimus induces insulin resistance.展开更多
目的:探讨UGT1A6 A541G、A552C基因多态对丙戊酸钠血药浓度的影响。方法:计算机检索PubMed、Medline、Cochrane Library、EMbase、CNKI、万方数据库,检索年限从建库至2024年4月,收集UGT1A6基因多态性与丙戊酸钠血药浓度文献,提取数据与...目的:探讨UGT1A6 A541G、A552C基因多态对丙戊酸钠血药浓度的影响。方法:计算机检索PubMed、Medline、Cochrane Library、EMbase、CNKI、万方数据库,检索年限从建库至2024年4月,收集UGT1A6基因多态性与丙戊酸钠血药浓度文献,提取数据与质量评价,采用Revman5.3软件进行Meta分析。结果:共纳入文献11篇,999例癫痫患者。Meta分析结果显示,在UGT1A6 A541G基因中,除AG vs GG[MD=0.16,95%CI(-0.39,0.70),P=0.50]外,AA vs AG[MD=0.53,95%CI(0.32,0.75),P<0.00001],AA vs GG[MD=0.67,95%CI(0.10,1.23),P=0.02],AA vs AG+GG[MD=0.61,95%CI(0.45,0.76)P<0.00001],两者差异均具有统计学意义,说明癫痫患者UGT1A6 A541G AA型丙戊酸钠血药浓度高于AG型或/和GG型。在UGT1A6 A552C中,除AC vs CC[MD=0.21,95%CI(-0.31,0.74),P=0.43]外,AA vs AC[MD=0.90,95%CI(0.77,1.03),P<0.00001],AA vs CC[MD=0.90,95%CI(0.77,1.03),P<0.00001],AA vs AC+CC[MD=1.58,95%CI(1.07,2.10),P<0.00001],两者差异均具有统计学意义,说明UGT1A6 A552C AA型丙戊酸钠血药浓度高于AC型或/和CC型。结论:癫痫患者UGT1A6 A541G和A552C基因多态性与丙戊酸钠血药浓度具有相关性,且基因突变可能导致丙戊酸钠血药浓度降低。展开更多
目的:检测急性心肌梗死(acute myocardial infarction,AMI)患者血清C1q/肿瘤坏死因子相关蛋白-6(C1q/tumor necrosis factor related protein 6,CTRP6)表达水平与病情和预后的相关性。方法:选取河南科技大学第一附属医院2021年1月至2022...目的:检测急性心肌梗死(acute myocardial infarction,AMI)患者血清C1q/肿瘤坏死因子相关蛋白-6(C1q/tumor necrosis factor related protein 6,CTRP6)表达水平与病情和预后的相关性。方法:选取河南科技大学第一附属医院2021年1月至2022年1月收治的144例AMI患者为研究对象,检测血清CTRP6的表达含量,并分析及评估CTRP6表达与AMI患者的临床特征和MACE的相关性。结果:AMI组患者外周血CTRP6含量为119.32(78.4,165.8)μg/L,显著低于对照组的372.3(303.6,454.2)μg/L(P<0.05);与高表达组比较,低表达组患者血清CK-MB、NT-proBNP、Gensini评分和SYNTAX II评分明显升高(P<0.05),而LVEF明显降低(P<0.05);此外,CTRP6低表达组患者MACE的累积发生率显著高于CTRP6高表达组(P<0.05);CTRP6预测AMI患者发生MACE事件的ROC曲线下面积为0.851。当最佳截断值为当88.423μg/L时,此时的敏感性为75.3%,特异性87.4%。结论:AMI患者血清CTRP6的表达明显降低,且CTRP6低表达可能是识别AMI高危患者和优化治疗策略的重要靶点。展开更多
文摘BACKGROUND Tacrolimus(FK506)is a key calcineurin inhibitor used to prevent organ transplant rejection and is effective in improving graft survival.However,it is linked to hyperglycemia and insulin resistance,contributing to new-onset diabetes after transplantation and negatively affecting islet function.AIM To study the effects of tacrolimus on the insulin signaling pathway of hepatocytes.METHODS HL7702 cells were treated with different concentrations of tacrolimus(0.1 mg/L,1 mg/L,5 mg/L)for 24 hours.The proteins involved in insulin signaling were detected by Western blotting.RESULTS Compared with the control group,phosphorylation of insulin receptor substrate(IRS)1 at Ser 307 and Ser 323 were increased significantly when the tacrolimus concentration reached 1 and 5 mg/L.Phosphorylation of IRS1 at Ser 1101 was also increased,although not significantly.However,phosphorylation of Ribosomal protein S6 kinase beta-1 at Thr 389 was decreased significantly.The levels of phosphorylated glycogen synthase kinase 3αSer 21 and Ser 9 were increased.Surprisingly,phosphorylation of glycogen synthase at Ser 641 was increased.There was no significant change in the activity of glycogen phosphorylase.CONCLUSION Tacrolimus has no direct effect on hepatic glucose metabolism,but inhibits IRS1-mediated insulin signaling.This may be one of the underlying mechanisms by which tacrolimus induces insulin resistance.
文摘目的:探讨UGT1A6 A541G、A552C基因多态对丙戊酸钠血药浓度的影响。方法:计算机检索PubMed、Medline、Cochrane Library、EMbase、CNKI、万方数据库,检索年限从建库至2024年4月,收集UGT1A6基因多态性与丙戊酸钠血药浓度文献,提取数据与质量评价,采用Revman5.3软件进行Meta分析。结果:共纳入文献11篇,999例癫痫患者。Meta分析结果显示,在UGT1A6 A541G基因中,除AG vs GG[MD=0.16,95%CI(-0.39,0.70),P=0.50]外,AA vs AG[MD=0.53,95%CI(0.32,0.75),P<0.00001],AA vs GG[MD=0.67,95%CI(0.10,1.23),P=0.02],AA vs AG+GG[MD=0.61,95%CI(0.45,0.76)P<0.00001],两者差异均具有统计学意义,说明癫痫患者UGT1A6 A541G AA型丙戊酸钠血药浓度高于AG型或/和GG型。在UGT1A6 A552C中,除AC vs CC[MD=0.21,95%CI(-0.31,0.74),P=0.43]外,AA vs AC[MD=0.90,95%CI(0.77,1.03),P<0.00001],AA vs CC[MD=0.90,95%CI(0.77,1.03),P<0.00001],AA vs AC+CC[MD=1.58,95%CI(1.07,2.10),P<0.00001],两者差异均具有统计学意义,说明UGT1A6 A552C AA型丙戊酸钠血药浓度高于AC型或/和CC型。结论:癫痫患者UGT1A6 A541G和A552C基因多态性与丙戊酸钠血药浓度具有相关性,且基因突变可能导致丙戊酸钠血药浓度降低。
文摘目的:检测急性心肌梗死(acute myocardial infarction,AMI)患者血清C1q/肿瘤坏死因子相关蛋白-6(C1q/tumor necrosis factor related protein 6,CTRP6)表达水平与病情和预后的相关性。方法:选取河南科技大学第一附属医院2021年1月至2022年1月收治的144例AMI患者为研究对象,检测血清CTRP6的表达含量,并分析及评估CTRP6表达与AMI患者的临床特征和MACE的相关性。结果:AMI组患者外周血CTRP6含量为119.32(78.4,165.8)μg/L,显著低于对照组的372.3(303.6,454.2)μg/L(P<0.05);与高表达组比较,低表达组患者血清CK-MB、NT-proBNP、Gensini评分和SYNTAX II评分明显升高(P<0.05),而LVEF明显降低(P<0.05);此外,CTRP6低表达组患者MACE的累积发生率显著高于CTRP6高表达组(P<0.05);CTRP6预测AMI患者发生MACE事件的ROC曲线下面积为0.851。当最佳截断值为当88.423μg/L时,此时的敏感性为75.3%,特异性87.4%。结论:AMI患者血清CTRP6的表达明显降低,且CTRP6低表达可能是识别AMI高危患者和优化治疗策略的重要靶点。
