LIM zinc finger domain containing 1(LIMS1),an evolutionarily conserved LIM domain adaptor protein,is implicated in diverse pathologies,including cancer and neurological disorders.However,its roles in cardiac diseases ...LIM zinc finger domain containing 1(LIMS1),an evolutionarily conserved LIM domain adaptor protein,is implicated in diverse pathologies,including cancer and neurological disorders.However,its roles in cardiac diseases and the underlying mechanisms remain unclear.Here,we explore the functions and mechanisms of LIMS1 in cardiac remodeling and heart failure.We identify the elevated LIMS1 expression in patients with dilated cardiomyopathy and murine cardiomyocytes,suggesting that LIMS1 dysregulation contributes to cardiac pathology.Using CRISPR/Cas9 technology,we generate a zebrafish model of lims1 loss-offunction mutant,which exhibits severe cardiac chamber remodeling,systolic dysfunction,and premature mortality,demonstrating the essential role of lims1 in maintaining cardiac integrity.Transcriptomic profiling reveals the activation of the gp130/Jak1/Stat3 signaling in the lims1-deficient hearts.Strikingly,pharmacological inhibition of Stat3 or c-Fos partially rescues cardiomyopathy phenotypes.Our findings reveal the underlying mechanism of lims1 deficiency-caused heart failure through gp130/Jak1/Stat3 hyperactivation,offering insights into cardiac remodeling and potential therapeutic strategies.展开更多
为制备抗高致病性猪繁殖与呼吸综合征病毒(H P-PRRSV)G P3株的单克隆抗体(M A b),本研究将H P-PRRSV H uN 4株免疫BA LB/c小鼠,以该病毒感染的细胞及真核表达的G P3蛋白为检测抗原,经间接免疫荧光(IFA)筛选获得了一株稳定分泌M A b的细...为制备抗高致病性猪繁殖与呼吸综合征病毒(H P-PRRSV)G P3株的单克隆抗体(M A b),本研究将H P-PRRSV H uN 4株免疫BA LB/c小鼠,以该病毒感染的细胞及真核表达的G P3蛋白为检测抗原,经间接免疫荧光(IFA)筛选获得了一株稳定分泌M A b的细胞株,命名为4G 5。抗体亚类鉴定重链类型为IgG 1,轻链类型为κ。该M A b细胞培养上清及腹水IFA效价分别为1∶256和1∶1 280。IFA结果显示,MAb4G5能够识别CH-1R、JXA1-R、HP-PRRSVHuN4株及其疫苗株HuN4-F112,而不识别RespPRRS M LV病毒株。Western blot结果显示,4G5与HP-PRRSVHuN4株及原核表达的GP3蛋白均可以反应,表明其针对的抗原表位为线性表位,中和试验结果显示该M A b无中和活性。通过截短表达GP3蛋白鉴定该M A b抗原表位识别序列为74W CRIGHD RCS83。本研究获得的M A b为进一步研究HP-PRRSV GP3蛋白的结构及功能奠定了基础。展开更多
基金the National Natural Science Foundation of China(82070394,82371863,31970504,82100491,and 82000307)the Hunan Provincial Key Laboratory of Regional Hereditary Birth Defects Prevention and Control project(HPKL2023001)for their support of this research.
文摘LIM zinc finger domain containing 1(LIMS1),an evolutionarily conserved LIM domain adaptor protein,is implicated in diverse pathologies,including cancer and neurological disorders.However,its roles in cardiac diseases and the underlying mechanisms remain unclear.Here,we explore the functions and mechanisms of LIMS1 in cardiac remodeling and heart failure.We identify the elevated LIMS1 expression in patients with dilated cardiomyopathy and murine cardiomyocytes,suggesting that LIMS1 dysregulation contributes to cardiac pathology.Using CRISPR/Cas9 technology,we generate a zebrafish model of lims1 loss-offunction mutant,which exhibits severe cardiac chamber remodeling,systolic dysfunction,and premature mortality,demonstrating the essential role of lims1 in maintaining cardiac integrity.Transcriptomic profiling reveals the activation of the gp130/Jak1/Stat3 signaling in the lims1-deficient hearts.Strikingly,pharmacological inhibition of Stat3 or c-Fos partially rescues cardiomyopathy phenotypes.Our findings reveal the underlying mechanism of lims1 deficiency-caused heart failure through gp130/Jak1/Stat3 hyperactivation,offering insights into cardiac remodeling and potential therapeutic strategies.
基金国家863计划(2011A A 10A 208)中央科研院所公益性基础科研业务费项目(ZBK J201218)
文摘为制备抗高致病性猪繁殖与呼吸综合征病毒(H P-PRRSV)G P3株的单克隆抗体(M A b),本研究将H P-PRRSV H uN 4株免疫BA LB/c小鼠,以该病毒感染的细胞及真核表达的G P3蛋白为检测抗原,经间接免疫荧光(IFA)筛选获得了一株稳定分泌M A b的细胞株,命名为4G 5。抗体亚类鉴定重链类型为IgG 1,轻链类型为κ。该M A b细胞培养上清及腹水IFA效价分别为1∶256和1∶1 280。IFA结果显示,MAb4G5能够识别CH-1R、JXA1-R、HP-PRRSVHuN4株及其疫苗株HuN4-F112,而不识别RespPRRS M LV病毒株。Western blot结果显示,4G5与HP-PRRSVHuN4株及原核表达的GP3蛋白均可以反应,表明其针对的抗原表位为线性表位,中和试验结果显示该M A b无中和活性。通过截短表达GP3蛋白鉴定该M A b抗原表位识别序列为74W CRIGHD RCS83。本研究获得的M A b为进一步研究HP-PRRSV GP3蛋白的结构及功能奠定了基础。
