目的本研究旨在探讨转录共激活因子(transcriptional coactivator with PDZ-binding motif,TAZ)与组蛋白H2A(histone H2A,H2A)的一种组蛋白变体H2A.Z,在缺氧诱导的肺损伤后修复中的作用及其潜在机制。方法利用缺氧模拟仓(5800 m)处理4 d...目的本研究旨在探讨转录共激活因子(transcriptional coactivator with PDZ-binding motif,TAZ)与组蛋白H2A(histone H2A,H2A)的一种组蛋白变体H2A.Z,在缺氧诱导的肺损伤后修复中的作用及其潜在机制。方法利用缺氧模拟仓(5800 m)处理4 d后,构建小鼠缺氧肺损伤模型,肺组织切片HE染色评估肺损伤程度。利用缺氧工作站(1%O_(2)浓度)处理小鼠肺泡上皮细胞系(murine lung epithelial-12,MLE12)24 h,构建MLE12缺氧细胞模型,Western blot分析检测TAZ表达。CCK-8实验评价肺泡上皮细胞(alveolar epithelial cells,AECs)增殖。免疫共沉淀(co-immunoprecipitation,Co-IP)实验验证TAZ与H2A.Z二者之间的相互作用。靶向剪切及转座酶标记技术(cleavage under targets and tagmentation,CUT&Tag)测序分析TAZ影响H2A.Z在染色质沉积情况。结果缺氧显著诱导小鼠肺组织肺泡萎缩及炎症浸润(P<0.01)。缺氧培养显著上调MLE12细胞中TAZ蛋白表达(P<0.05)。CCK-8实验发现,敲低TAZ后AECs增殖能力显著下降(P<0.01)。Co-IP证实TAZ与H2A.Z存在物理相互作用。靶向剪切及转座酶标记技术(cleavage under targets and tagmentation,CUT&Tag)测序显示缺氧促进H2A.Z在染色质上的沉积(常氧结合位点31817,缺氧结合位点44078),而TAZ敲低部分逆转此现象(结合位点37840)。结论缺氧显著上调TAZ表达,后者与H2A.Z的结合并促进H2A.Z在染色质上的沉积,增强AECs增殖以应对缺氧损伤。展开更多
2024年9月24日,浙江大学药学院张翔南教授和基础医学院胡薇薇教授团队在《细胞报告》(Cell Reports)上发表了题为“Deletion of histamine H2 receptor in VTA dopaminergic neurons of mice induces behavior reminiscent of mania”...2024年9月24日,浙江大学药学院张翔南教授和基础医学院胡薇薇教授团队在《细胞报告》(Cell Reports)上发表了题为“Deletion of histamine H2 receptor in VTA dopaminergic neurons of mice induces behavior reminiscent of mania”的研究论文(DOI:10.1016/j.celrep.2024.114717),发现中脑腹侧被盖区(VTA)多巴胺能神经元上的组胺H2受体(H2R)缺失介导了小鼠的躁狂样行为,组胺H2R可作为躁狂症治疗的精准干预靶点。展开更多
oluble solids content(SSC) plays an important role in determining the flavor of tomato fruits. Tomato fruit SSC is transcriptionally regulated via sugar metabolism. Previous studies have predominantly focused on the r...oluble solids content(SSC) plays an important role in determining the flavor of tomato fruits. Tomato fruit SSC is transcriptionally regulated via sugar metabolism. Previous studies have predominantly focused on the role of C2H2-type zinc finger proteins in tomato growth and development. However, the specific regulatory mechanisms of C2H2 in the accumulation of soluble solids in tomato fruits are not fully understood. This study used eight tomato accessions with varying levels of SSC to study the expression of SlC2H2 family genes in red ripe fruits. The levels of SlC2H2-71 expression were found to be significantly reduced in high-SSC accessions compared to low-SSC accessions. Several Slc2h2-71 mutant lines were developed using the CRISPR-Cas9 system, which led to elevated levels of soluble solids, fructose, glucose, malic acid, and citric acid in mature red ripe fruits. However, the sucrose content in the edited Slc2h2-71 mutant lines was generally lower. RNA-seq analysis revealed that fruits from the mutant lines had altered expression of genes related to the sugar and acid metabolic pathways, which was further confirmed by quantitative real-time PCR. Specifically, the expression of SlLIN5 encoding the cell wall invertase(CWIN) was elevated. The yeast one-hybrid(Y1H) assay, 35S::UAS-GUS, dual-luciferase reporter systems and electrophoretic mobility shift assay(EMSA) demonstrated that C2H2-71 regulates tomato sugar metabolism by directly binding to the promoter region of Sl LIN5, culminating in the repression of its transcriptional activity. The activity of acid invertase exhibited a significantly higher level in the SlC2H2-71 knock-out lines compared to the control lines. In summary, the regulation of tomato fruit SSC by C2H2-71 involves the inhibition of SlLIN5 expression.展开更多
文摘目的本研究旨在探讨转录共激活因子(transcriptional coactivator with PDZ-binding motif,TAZ)与组蛋白H2A(histone H2A,H2A)的一种组蛋白变体H2A.Z,在缺氧诱导的肺损伤后修复中的作用及其潜在机制。方法利用缺氧模拟仓(5800 m)处理4 d后,构建小鼠缺氧肺损伤模型,肺组织切片HE染色评估肺损伤程度。利用缺氧工作站(1%O_(2)浓度)处理小鼠肺泡上皮细胞系(murine lung epithelial-12,MLE12)24 h,构建MLE12缺氧细胞模型,Western blot分析检测TAZ表达。CCK-8实验评价肺泡上皮细胞(alveolar epithelial cells,AECs)增殖。免疫共沉淀(co-immunoprecipitation,Co-IP)实验验证TAZ与H2A.Z二者之间的相互作用。靶向剪切及转座酶标记技术(cleavage under targets and tagmentation,CUT&Tag)测序分析TAZ影响H2A.Z在染色质沉积情况。结果缺氧显著诱导小鼠肺组织肺泡萎缩及炎症浸润(P<0.01)。缺氧培养显著上调MLE12细胞中TAZ蛋白表达(P<0.05)。CCK-8实验发现,敲低TAZ后AECs增殖能力显著下降(P<0.01)。Co-IP证实TAZ与H2A.Z存在物理相互作用。靶向剪切及转座酶标记技术(cleavage under targets and tagmentation,CUT&Tag)测序显示缺氧促进H2A.Z在染色质上的沉积(常氧结合位点31817,缺氧结合位点44078),而TAZ敲低部分逆转此现象(结合位点37840)。结论缺氧显著上调TAZ表达,后者与H2A.Z的结合并促进H2A.Z在染色质上的沉积,增强AECs增殖以应对缺氧损伤。
文摘2024年9月24日,浙江大学药学院张翔南教授和基础医学院胡薇薇教授团队在《细胞报告》(Cell Reports)上发表了题为“Deletion of histamine H2 receptor in VTA dopaminergic neurons of mice induces behavior reminiscent of mania”的研究论文(DOI:10.1016/j.celrep.2024.114717),发现中脑腹侧被盖区(VTA)多巴胺能神经元上的组胺H2受体(H2R)缺失介导了小鼠的躁狂样行为,组胺H2R可作为躁狂症治疗的精准干预靶点。
基金supported by the grants from the National Key Research & Development Plan of China (2022YFF10030022022YFD1200502)+5 种基金the National Natural Science Foundation of China (32372696)the Wuhan Biological Breeding Major Project, China (2022021302024852)the HZAU–AGIS Cooperation Fund, China (SZYJY2023022)the Funds for High Quality Development of Hubei Seed Industry, China (HBZY2023B004)the Hubei Agriculture Research System, China (2024HBSTX4-06)the Funds of National Key Laboratory for Germplasm Innovation & Utilization of Horticultural Crops, China (Horti3Y-2024-008)。
文摘oluble solids content(SSC) plays an important role in determining the flavor of tomato fruits. Tomato fruit SSC is transcriptionally regulated via sugar metabolism. Previous studies have predominantly focused on the role of C2H2-type zinc finger proteins in tomato growth and development. However, the specific regulatory mechanisms of C2H2 in the accumulation of soluble solids in tomato fruits are not fully understood. This study used eight tomato accessions with varying levels of SSC to study the expression of SlC2H2 family genes in red ripe fruits. The levels of SlC2H2-71 expression were found to be significantly reduced in high-SSC accessions compared to low-SSC accessions. Several Slc2h2-71 mutant lines were developed using the CRISPR-Cas9 system, which led to elevated levels of soluble solids, fructose, glucose, malic acid, and citric acid in mature red ripe fruits. However, the sucrose content in the edited Slc2h2-71 mutant lines was generally lower. RNA-seq analysis revealed that fruits from the mutant lines had altered expression of genes related to the sugar and acid metabolic pathways, which was further confirmed by quantitative real-time PCR. Specifically, the expression of SlLIN5 encoding the cell wall invertase(CWIN) was elevated. The yeast one-hybrid(Y1H) assay, 35S::UAS-GUS, dual-luciferase reporter systems and electrophoretic mobility shift assay(EMSA) demonstrated that C2H2-71 regulates tomato sugar metabolism by directly binding to the promoter region of Sl LIN5, culminating in the repression of its transcriptional activity. The activity of acid invertase exhibited a significantly higher level in the SlC2H2-71 knock-out lines compared to the control lines. In summary, the regulation of tomato fruit SSC by C2H2-71 involves the inhibition of SlLIN5 expression.
