The Gametophyte factor1(Ga1) locus in maize confers unilateral cross-incompatibility(UCI), and it is controlled by both pollen and silk-specific determinants. Although the Ga1 locus has been reported for more than a c...The Gametophyte factor1(Ga1) locus in maize confers unilateral cross-incompatibility(UCI), and it is controlled by both pollen and silk-specific determinants. Although the Ga1 locus has been reported for more than a century and is widely utilized in maize breeding programs, only the pollen-specific ZmGa1P has been shown to function as a male determinant;thus, the genomic structure of the Ga1 locus and all the determinants that control UCI at this locus have not yet been fully characterized.Here, we used map-based cloning to confirm the determinants of UCI at the Ga1 locus and maize pan-genome sequence data to characterize the genomic structure of the Ga1 locus. The Ga1 locus comprises one silk-expressed pectin methylesterase gene(PME, ZmGa1F) and eight pollenexpressed PMEs(ZmGa1P and ZmGa1PL1-7).Knockout of ZmGa1F in Ga1/Ga1 lines leads to the complete loss of the female barrier function. The expression of individual ZmGa1PL genes in a ga1/ga1 background endows ga1 pollen with the ability to overcome the female barrier of the Ga1 locus. These findings, combined with genomic data and genetic analyses, indicate that the Ga1 locus is modulated by a single female determinant and multiple male determinants, which are tightly linked.The results of this study provide valuable insights into the genomic structure of the Ga2 and Tcb1 loci and will aid applications of these loci in maize breeding programs.展开更多
目的:探讨先天性单侧输精管缺如(CUAVD)合并无精子症患者囊性纤维化跨膜转导(CFTR)基因全外显子检测的结果与意义。方法:抽取CUAVD合并无精子症6例患者外周血行CFTR全外显子突变及多态性检测,测序结果与UCSC Genome Browser on Human De...目的:探讨先天性单侧输精管缺如(CUAVD)合并无精子症患者囊性纤维化跨膜转导(CFTR)基因全外显子检测的结果与意义。方法:抽取CUAVD合并无精子症6例患者外周血行CFTR全外显子突变及多态性检测,测序结果与UCSC Genome Browser on Human Dec.2013 Assembly进行在线比对及分析。结果:6例CUAVD合并无精子症患者中,1例第6号外显子中可检测到1个已知错义突变c.592G>C,2例患者第10号外显子前非编码区域发现c.1210-12T[5]剪切突变,且该2例患者合并第11号外显子上V470单倍体。结论:CUAVD合并无精子症患者CFTR全外显子基因突变有一定的检出率,有必要对这部分患者进行CFTR基因突变检测。展开更多
目的观察磨除单侧后牙造成偏侧咀嚼的大鼠三叉神经节内降钙素基因相关肽(calcitonin gene-relatedpeptide,CGRP)的表达情况,进一步探讨颞颌关节病的发病机制。方法Wistar雄性大鼠30只,随机分为6组,包括3个实验组及相应的对照组,每组5只...目的观察磨除单侧后牙造成偏侧咀嚼的大鼠三叉神经节内降钙素基因相关肽(calcitonin gene-relatedpeptide,CGRP)的表达情况,进一步探讨颞颌关节病的发病机制。方法Wistar雄性大鼠30只,随机分为6组,包括3个实验组及相应的对照组,每组5只。实验组动物磨除右侧上、下颌磨牙,人为造成单侧咀嚼。双侧三叉神经节(trigeminal ganglia,TG)切片行CGRP免疫组织化学反应(SABC法)。光镜观察拍片,并用Image Pro Plus 5.1图像分析软件分别进行测定。结果与对照组对照。结果每一实验组咀嚼侧和非咀嚼侧TG内CGRP免疫阳性神经元百分比与各自对照组比较显著降低(P<0.01,P<0.05),其非咀嚼侧明显低于咀嚼侧(P<0.01,P<0.05)。结论三叉神经节内CGRP参与了单侧咀嚼引起的颞颌关节病的病理过程,且两侧TG内CGRP释放量不同。展开更多
OBJECTIVE:To determine the mechanisms by which Kangxianling(KXL) treats renal interstitial fibrosis using a customized gene chip.METHODS:Twelve out of 18 specific pathogen-free sprague dawley(SPF SD) rats underwent a ...OBJECTIVE:To determine the mechanisms by which Kangxianling(KXL) treats renal interstitial fibrosis using a customized gene chip.METHODS:Twelve out of 18 specific pathogen-free sprague dawley(SPF SD) rats underwent a unilateral ureteral occlusion.These rats were then randomly assigned into either the model unilateral ureteral obstruction(UUO) or Kangxianling(KXL) group.The other six rats were assigned to the sham-operated group.The UUO and sham-operated groups were given normal saline via intragastric administration,whereas the KXL group was given KXL via intragastric administration.All rats were sacrificed for renal tissue collection(i.e.left nephridial tissue),and the detection of genetic changes with the customized chip.RESULTS:Compared to the sham-operated group,transforming growth factor-β1(TGF-β1),Smad2,and Smad3 genes were significantly up-regulated in the UUO group,with >1.5-fold rise(P<0.01).The Smad7 gene was significantly reduced in the UUO versus sham-operated group,with a down-regulation of >1.5-fold(P<0.01).In the KXL group,TGF-β1,Smad2,and Smad3 genes were significantly reduced compared to the UUO group,with a down-regulation of >1.5-fold(P<0.01),whereas the Smad7 gene was significantly increased compared to the UUO group,with an up-regulation of >1.5-fold(P<0.01).CONCLUSION:It was found that KXL can significantly reduce the gene levels of TGF-β1,Smad2,and Smad3.Immunohistochemistry findings also revealed significantly lower TGF-β1/Smads-mediated gene transcription activity.These findings suggest that KXL may negatively regulate the TGF-β1/Smads signal pathway to inhibit the occurrence of renal fibrosis.展开更多
基金supported by National Key R&D Program of China (2022YFF1003500)grants from the National Natural Science Foundation of China (32101725)。
文摘The Gametophyte factor1(Ga1) locus in maize confers unilateral cross-incompatibility(UCI), and it is controlled by both pollen and silk-specific determinants. Although the Ga1 locus has been reported for more than a century and is widely utilized in maize breeding programs, only the pollen-specific ZmGa1P has been shown to function as a male determinant;thus, the genomic structure of the Ga1 locus and all the determinants that control UCI at this locus have not yet been fully characterized.Here, we used map-based cloning to confirm the determinants of UCI at the Ga1 locus and maize pan-genome sequence data to characterize the genomic structure of the Ga1 locus. The Ga1 locus comprises one silk-expressed pectin methylesterase gene(PME, ZmGa1F) and eight pollenexpressed PMEs(ZmGa1P and ZmGa1PL1-7).Knockout of ZmGa1F in Ga1/Ga1 lines leads to the complete loss of the female barrier function. The expression of individual ZmGa1PL genes in a ga1/ga1 background endows ga1 pollen with the ability to overcome the female barrier of the Ga1 locus. These findings, combined with genomic data and genetic analyses, indicate that the Ga1 locus is modulated by a single female determinant and multiple male determinants, which are tightly linked.The results of this study provide valuable insights into the genomic structure of the Ga2 and Tcb1 loci and will aid applications of these loci in maize breeding programs.
文摘目的:探讨先天性单侧输精管缺如(CUAVD)合并无精子症患者囊性纤维化跨膜转导(CFTR)基因全外显子检测的结果与意义。方法:抽取CUAVD合并无精子症6例患者外周血行CFTR全外显子突变及多态性检测,测序结果与UCSC Genome Browser on Human Dec.2013 Assembly进行在线比对及分析。结果:6例CUAVD合并无精子症患者中,1例第6号外显子中可检测到1个已知错义突变c.592G>C,2例患者第10号外显子前非编码区域发现c.1210-12T[5]剪切突变,且该2例患者合并第11号外显子上V470单倍体。结论:CUAVD合并无精子症患者CFTR全外显子基因突变有一定的检出率,有必要对这部分患者进行CFTR基因突变检测。
文摘目的观察磨除单侧后牙造成偏侧咀嚼的大鼠三叉神经节内降钙素基因相关肽(calcitonin gene-relatedpeptide,CGRP)的表达情况,进一步探讨颞颌关节病的发病机制。方法Wistar雄性大鼠30只,随机分为6组,包括3个实验组及相应的对照组,每组5只。实验组动物磨除右侧上、下颌磨牙,人为造成单侧咀嚼。双侧三叉神经节(trigeminal ganglia,TG)切片行CGRP免疫组织化学反应(SABC法)。光镜观察拍片,并用Image Pro Plus 5.1图像分析软件分别进行测定。结果与对照组对照。结果每一实验组咀嚼侧和非咀嚼侧TG内CGRP免疫阳性神经元百分比与各自对照组比较显著降低(P<0.01,P<0.05),其非咀嚼侧明显低于咀嚼侧(P<0.01,P<0.05)。结论三叉神经节内CGRP参与了单侧咀嚼引起的颞颌关节病的病理过程,且两侧TG内CGRP释放量不同。
基金Supported by National Natural Science Foundation of China Grant(30873259)/(81173219)Ministry of Science and Technology in the pharmaceutical industry,scientific research and special(201007005)+7 种基金Shanghai Science and Technology Innovation Plan of Action(11DZ1973100)Shanghai Excellent academic leaders Project Grant(08XD14039)E-institute of TCM Internal Medicine of Shanghai Municipal Education Commission Grant(E03008)Innovative Research Team in Universities,Shanghai Municipal Education Commission of GrantWenzhou Science & Technology Bureau of Grant(Y20070049)Wenzhou Municipal Health Bureau of Grant(2010A012)Wenzhou Center of Traditional Chinese Medicine Laboratory GrantZhejiang Province 151 and Wenzhou Municipal 551 Talented Grant
文摘OBJECTIVE:To determine the mechanisms by which Kangxianling(KXL) treats renal interstitial fibrosis using a customized gene chip.METHODS:Twelve out of 18 specific pathogen-free sprague dawley(SPF SD) rats underwent a unilateral ureteral occlusion.These rats were then randomly assigned into either the model unilateral ureteral obstruction(UUO) or Kangxianling(KXL) group.The other six rats were assigned to the sham-operated group.The UUO and sham-operated groups were given normal saline via intragastric administration,whereas the KXL group was given KXL via intragastric administration.All rats were sacrificed for renal tissue collection(i.e.left nephridial tissue),and the detection of genetic changes with the customized chip.RESULTS:Compared to the sham-operated group,transforming growth factor-β1(TGF-β1),Smad2,and Smad3 genes were significantly up-regulated in the UUO group,with >1.5-fold rise(P<0.01).The Smad7 gene was significantly reduced in the UUO versus sham-operated group,with a down-regulation of >1.5-fold(P<0.01).In the KXL group,TGF-β1,Smad2,and Smad3 genes were significantly reduced compared to the UUO group,with a down-regulation of >1.5-fold(P<0.01),whereas the Smad7 gene was significantly increased compared to the UUO group,with an up-regulation of >1.5-fold(P<0.01).CONCLUSION:It was found that KXL can significantly reduce the gene levels of TGF-β1,Smad2,and Smad3.Immunohistochemistry findings also revealed significantly lower TGF-β1/Smads-mediated gene transcription activity.These findings suggest that KXL may negatively regulate the TGF-β1/Smads signal pathway to inhibit the occurrence of renal fibrosis.
