Bacterial or viral infections,such as Brucella,mumps virus,herpes simplex virus,and Zika virus,destroy immune homeostasis of the testes,leading to spermatogenesis disorder and infertility.Of note,recent research shows...Bacterial or viral infections,such as Brucella,mumps virus,herpes simplex virus,and Zika virus,destroy immune homeostasis of the testes,leading to spermatogenesis disorder and infertility.Of note,recent research shows that SARS-CoV-2 can infect male gonads and destroy Sertoli and Leydig cells,leading to male reproductive dysfunction.Due to the many side effects associated with antibiotic therapy,finding alternative treatments for inflammatory injury remains critical.Here,we found that Dmrt1 plays an important role in regulating testicular immune homeostasis.Knockdown of Dmrt1 in male mice inhibited spermatogenesis with a broad inflammatory response in seminiferous tubules and led to the loss of spermatogenic epithelial cells.Chromatin immunoprecipitation sequencing(ChIP-seq)and RNA sequencing(RNA-seq)revealed that Dmrt1 positively regulated the expression of Spry1,an inhibitory protein of the receptor tyrosine kinase(RTK)signaling pathway.Furthermore,immunoprecipitation-mass spectrometry(IP-MS)and co-immunoprecipitation(Co-IP)analysis indicated that SPRY1 binds to nuclear factor kappa B1(NF-κB1)to prevent nuclear translocation of p65,inhibit activation of NF-κB signaling,prevent excessive inflammatory reaction in the testis,and protect the integrity of the blood-testis barrier.In view of this newly identified Dmrt1-Spry1-NF-κB axis mechanism in the regulation of testicular immune homeostasis,our study opens new avenues for the prevention and treatment of male reproductive diseases in humans and livestock.展开更多
利用RT-PCR和cDNA末端快速扩增技术(rapid amplification of cDNA ends,RACE)克隆了黄颡鱼DMRT1基因cDNA全长序列,并利用实时荧光定量RT-PCR技术对该基因在黄颡鱼成体不同组织及不同发育阶段的表达情况进行研究。结果表明,黄颡鱼DMRT1基...利用RT-PCR和cDNA末端快速扩增技术(rapid amplification of cDNA ends,RACE)克隆了黄颡鱼DMRT1基因cDNA全长序列,并利用实时荧光定量RT-PCR技术对该基因在黄颡鱼成体不同组织及不同发育阶段的表达情况进行研究。结果表明,黄颡鱼DMRT1基因cDNA序列全长1 381bp,其中5′端非翻译区30bp,3′端非翻译区454bp[不包括poly(A)],开放阅读框885bp,编码295个氨基酸。氨基酸序列同源性分析表明,黄颡鱼DMRT1基因与革胡子鲶同源性最高(为81%),与黑鲷、虹鳟、斑马鱼、青鳉的同源性分别为60%、59%、64%和52%,与小鼠、人的同源性较低,分别为42%和44%。实时荧光定量RT-PCR分析表明:DMRT1基因在黄颡鱼胚胎发育阶段及胚后发育的1～51d仔鱼均有表达,且在胚后发育的第31天表达量最高;在成体,只在雄性精巢中特异性表达,其他组织均无表达,且性腺发育阶段的Ⅳ期精巢表达量最高,表明该基因可能在黄颡鱼雄性性腺的形成或功能维持上具有重要作用。展开更多
DMRT1(Double sex and Mab-3 related transcription factor 1)是鸡性腺分化和发育的关键候选基因,其详细的功能和作用途径还未被阐明。为了解明DMRT1在鸡性腺分化和发育过程中的功能,研究首次利用在线sg RNA平台设计4条鸡DMRT1 sg RNA...DMRT1(Double sex and Mab-3 related transcription factor 1)是鸡性腺分化和发育的关键候选基因,其详细的功能和作用途径还未被阐明。为了解明DMRT1在鸡性腺分化和发育过程中的功能,研究首次利用在线sg RNA平台设计4条鸡DMRT1 sg RNA序列,构建了4个sg RNA表达载体:Guide-1、Guide-2、Guide-3和Guide-4。转染鸡DF-1成纤维细胞后,利用T7E1内切酶的方法检测4个表达载体的打靶效率。结果显示,成功构建了4条正确的鸡DMRT1 sg RNA表达载体,并且都能高效地在DF-1细胞中表达,其中Guide-4表达载体能有效地打靶DMRT1基因,打靶效率为24.82%。研究结果为进一步在鸡胚敲除DMRT1基因,研究其功能奠定了基础。展开更多
基金supported by the National Natural Science Foundation of China(32072806,31572399)National Key Research and Development Program of China(2022YFD1302201)+3 种基金Program of Shaanxi Province Science and Technology Innovation Team(2019TD-036)Major Projects of Natural Science Foundation of Inner Mongolia Autonomous Region(2020ZD10)Key Research and Development Program of Shaanxi Province(2022NY-044)Key Technologies Demonstration of Animal Husbandry in Shaanxi Province(20221086)。
文摘Bacterial or viral infections,such as Brucella,mumps virus,herpes simplex virus,and Zika virus,destroy immune homeostasis of the testes,leading to spermatogenesis disorder and infertility.Of note,recent research shows that SARS-CoV-2 can infect male gonads and destroy Sertoli and Leydig cells,leading to male reproductive dysfunction.Due to the many side effects associated with antibiotic therapy,finding alternative treatments for inflammatory injury remains critical.Here,we found that Dmrt1 plays an important role in regulating testicular immune homeostasis.Knockdown of Dmrt1 in male mice inhibited spermatogenesis with a broad inflammatory response in seminiferous tubules and led to the loss of spermatogenic epithelial cells.Chromatin immunoprecipitation sequencing(ChIP-seq)and RNA sequencing(RNA-seq)revealed that Dmrt1 positively regulated the expression of Spry1,an inhibitory protein of the receptor tyrosine kinase(RTK)signaling pathway.Furthermore,immunoprecipitation-mass spectrometry(IP-MS)and co-immunoprecipitation(Co-IP)analysis indicated that SPRY1 binds to nuclear factor kappa B1(NF-κB1)to prevent nuclear translocation of p65,inhibit activation of NF-κB signaling,prevent excessive inflammatory reaction in the testis,and protect the integrity of the blood-testis barrier.In view of this newly identified Dmrt1-Spry1-NF-κB axis mechanism in the regulation of testicular immune homeostasis,our study opens new avenues for the prevention and treatment of male reproductive diseases in humans and livestock.
基金This work was supported by the National Basic Research Program of China(No.2004CB117401)Chinese National Programsfor High Technology Research and Development(No.2004AA243060).
文摘DMRT1(Double sex and Mab-3 related transcription factor 1)是鸡性腺分化和发育的关键候选基因,其详细的功能和作用途径还未被阐明。为了解明DMRT1在鸡性腺分化和发育过程中的功能,研究首次利用在线sg RNA平台设计4条鸡DMRT1 sg RNA序列,构建了4个sg RNA表达载体:Guide-1、Guide-2、Guide-3和Guide-4。转染鸡DF-1成纤维细胞后,利用T7E1内切酶的方法检测4个表达载体的打靶效率。结果显示,成功构建了4条正确的鸡DMRT1 sg RNA表达载体,并且都能高效地在DF-1细胞中表达,其中Guide-4表达载体能有效地打靶DMRT1基因,打靶效率为24.82%。研究结果为进一步在鸡胚敲除DMRT1基因,研究其功能奠定了基础。
