Hyaluronan and proteoglycan link protein 1(Hapln1)supports active cardiomyogenesis in zebrafish hearts,but its regulation in mammal cardiomyocytes is unclear.This study aimed to explore the potential regulation of Hap...Hyaluronan and proteoglycan link protein 1(Hapln1)supports active cardiomyogenesis in zebrafish hearts,but its regulation in mammal cardiomyocytes is unclear.This study aimed to explore the potential regulation of Hapln1 in the dedifferentiation and proliferation of cardiomyocytes and its therapeutic value in myocardial infarction with human induced pluripotent stem cell(hiPSC)-derived cardiomyocytes(CMs)and an adult mouse model of myocardial infarction.HiPSC-CMs and adult mice with myocardial infarction were used as in vitro and in vivo models,respectively.Previous single-cell RNA sequencing data were retrieved for bioinformatic exploration.The results showed that recombinant human Hapln1(rhHapln1)promotes the proliferation of hiPSC-CMs in a dose-dependent manner.As a physical binding protein of Hapln1,versican interacted with Nodal growth differentiation factor(NODAL)and growth differentiation factor 11(GDF11).GDF11,but not NODAL,was expressed by hiPSC-CMs.GDF11 expression was unaffected by rhHapln1 treatment.However,this molecule was required for rhHapln1-mediated activation of the transforming growth factor(TGF)-β/Drosophila mothers against decapentaplegic protein(SMAD)2/3 signaling in hiPSC-CMs,which stimulates cell dedifferentiation and proliferation.Recombinant mouse Hapln1(rmHapln1)could induce cardiac regeneration in the adult mouse model of myocardial infarction.In addition,rmHapln1 induced hiPSC-CM proliferation.In conclusion,Hapln1 can stimulate the dedifferentiation and proliferation of iPSC-derived cardiomyocytes by promoting versican-based GDF11 trapping and subsequent activation of the TGF-β/SMAD2/3 signaling pathway.Hapln1 might be an effective hiPSC-CM dedifferentiation and proliferation agent and a potential reagent for repairing damaged hearts.展开更多
目的运用癌症基因图谱(the cancer genome atlas,TCGA)基因组学数据挖掘潜在治疗胶质母细胞瘤的药物卤泛群(halofantrine),通过网络药理学方法探讨卤泛群防治胶质母细胞瘤的作用机制,并结合细胞实验对卤泛群防治胶质母细胞瘤的机制进行...目的运用癌症基因图谱(the cancer genome atlas,TCGA)基因组学数据挖掘潜在治疗胶质母细胞瘤的药物卤泛群(halofantrine),通过网络药理学方法探讨卤泛群防治胶质母细胞瘤的作用机制,并结合细胞实验对卤泛群防治胶质母细胞瘤的机制进行验证。方法通过癌症临床公开数据库TCGA挖掘胶质母细胞瘤发生发展的关键基因,利用CMAP数据库寻找潜在治疗胶质母细胞瘤的药物,借助STITCH、Drug bank、Binding DB、BATMAN-TCM、TargetNet、SwissTarget、PubChem检索药物靶点信息,利用Drug bank、DisGeNET、GeneCards,TDD筛选胶质母细胞瘤靶点。通过Cytoscape构建“药物-活性成分-靶点”可视化网络图,通过进行GO、KEGG和分子对接分析,预测其作用机制。利用CCK-8及qPCR等方法验证卤泛群对胶质母细胞瘤细胞及治疗靶点的作用。结果筛选出潜在治疗胶质母细胞瘤的药物卤泛群,卤泛群有150个作用靶点,胶质母细胞瘤治疗靶点有173个,和药物交集靶点有12个,获得3个核心靶点:EGFR、MAPK14、IGF1R。分子对接结果显示,卤泛群与核心靶点结合的潜能和活性良好。CCK-8和qPCR实验结果表明卤泛群可通过EGFR、MAPK14、IGF1R靶点抑制胶质母细胞瘤细胞增殖。结论卤泛群通过EGFR、MAPK14、IGF1R靶点发挥治疗胶质母细胞瘤的作用。展开更多
基金Shaanxi Province Natural Science Foundation,China(Grant No.:2021JM-568).
文摘Hyaluronan and proteoglycan link protein 1(Hapln1)supports active cardiomyogenesis in zebrafish hearts,but its regulation in mammal cardiomyocytes is unclear.This study aimed to explore the potential regulation of Hapln1 in the dedifferentiation and proliferation of cardiomyocytes and its therapeutic value in myocardial infarction with human induced pluripotent stem cell(hiPSC)-derived cardiomyocytes(CMs)and an adult mouse model of myocardial infarction.HiPSC-CMs and adult mice with myocardial infarction were used as in vitro and in vivo models,respectively.Previous single-cell RNA sequencing data were retrieved for bioinformatic exploration.The results showed that recombinant human Hapln1(rhHapln1)promotes the proliferation of hiPSC-CMs in a dose-dependent manner.As a physical binding protein of Hapln1,versican interacted with Nodal growth differentiation factor(NODAL)and growth differentiation factor 11(GDF11).GDF11,but not NODAL,was expressed by hiPSC-CMs.GDF11 expression was unaffected by rhHapln1 treatment.However,this molecule was required for rhHapln1-mediated activation of the transforming growth factor(TGF)-β/Drosophila mothers against decapentaplegic protein(SMAD)2/3 signaling in hiPSC-CMs,which stimulates cell dedifferentiation and proliferation.Recombinant mouse Hapln1(rmHapln1)could induce cardiac regeneration in the adult mouse model of myocardial infarction.In addition,rmHapln1 induced hiPSC-CM proliferation.In conclusion,Hapln1 can stimulate the dedifferentiation and proliferation of iPSC-derived cardiomyocytes by promoting versican-based GDF11 trapping and subsequent activation of the TGF-β/SMAD2/3 signaling pathway.Hapln1 might be an effective hiPSC-CM dedifferentiation and proliferation agent and a potential reagent for repairing damaged hearts.
