Peroxisomes are organelles enclosed by a single membrane and are present in various species.The abruption of peroxisomes is correlated with peroxisome biogenesis disorders and single peroxisomal enzyme deficiencies th...Peroxisomes are organelles enclosed by a single membrane and are present in various species.The abruption of peroxisomes is correlated with peroxisome biogenesis disorders and single peroxisomal enzyme deficiencies that induce diverse diseases in different organs.However,little is known about the protein compositions and corresponding roles of heterogeneous peroxisomes in various organs.Through transcriptomic and proteomic analyses,we observed heterogenous peroxisomal components among different organs,as well as between testicular somatic cells and different developmental stages of germ cells.As Pex3 is expressed in both germ cells and Sertoli cells,we generated Pex3 germ cell-and Sertoli cell-specific knockout mice.While Pex3 deletion in Sertoli cells did not affect spermatogenesis,the deletion in germ cells resulted in male sterility,manifested as the destruction of intercellular bridges between spermatids and the formation of multinucleated giant cells.Proteomic analysis of the Pex3-deleted spermatids revealed defective expressions of peroxisomal proteins and spermiogenesis-related proteins.These findings provide new insights that PEX3-dependent peroxisomes are essential for germ cells undergoing spermiogenesis,but not for Sertoli cells.展开更多
精子DNA碎片(sperm DNA fragmentation,SDF)在男性不育症中发生率较高。SDF常伴发少、弱精子症,也可发生于常规精液指标正常的不育症患者。其发生机制包括精子成熟障碍、凋亡异常和氧化应激过高等。由于很多文献报道其与自然妊娠和辅助...精子DNA碎片(sperm DNA fragmentation,SDF)在男性不育症中发生率较高。SDF常伴发少、弱精子症,也可发生于常规精液指标正常的不育症患者。其发生机制包括精子成熟障碍、凋亡异常和氧化应激过高等。由于很多文献报道其与自然妊娠和辅助生殖技术结局存在负相关,SDF检测已在男性不育症和辅助生殖技术中得到越来越广泛的应用。本专家共识复习和评估了SDF相关文献,对SDF的危险因素、检测方法、临床意义和处理等提出2项良好实践要点和9项推荐建议。本共识大部分推荐建议的证据和级别属于低或中等,表明仍需要进一步的研究证实临床应用SDF检测的价值。展开更多
基金supported by grants from the National Natural Science Foundation of China(Grant No.31890784 to J.S.)National Key R&D Program(Grant No.2021YFC2700200 to X.G.)+2 种基金National Natural Science Foundation of China(Grant Nos.92068109 and 82122025 to Yan Yuan)Natural Science Foundation of the Jiangsu Higher Education Institutions of China(Grant No.21KJA310007 to Yan Yuan)Science Foundation of Gusu School(Grant No.GSKY20220101 to J.S.).
文摘Peroxisomes are organelles enclosed by a single membrane and are present in various species.The abruption of peroxisomes is correlated with peroxisome biogenesis disorders and single peroxisomal enzyme deficiencies that induce diverse diseases in different organs.However,little is known about the protein compositions and corresponding roles of heterogeneous peroxisomes in various organs.Through transcriptomic and proteomic analyses,we observed heterogenous peroxisomal components among different organs,as well as between testicular somatic cells and different developmental stages of germ cells.As Pex3 is expressed in both germ cells and Sertoli cells,we generated Pex3 germ cell-and Sertoli cell-specific knockout mice.While Pex3 deletion in Sertoli cells did not affect spermatogenesis,the deletion in germ cells resulted in male sterility,manifested as the destruction of intercellular bridges between spermatids and the formation of multinucleated giant cells.Proteomic analysis of the Pex3-deleted spermatids revealed defective expressions of peroxisomal proteins and spermiogenesis-related proteins.These findings provide new insights that PEX3-dependent peroxisomes are essential for germ cells undergoing spermiogenesis,but not for Sertoli cells.
文摘精子DNA碎片(sperm DNA fragmentation,SDF)在男性不育症中发生率较高。SDF常伴发少、弱精子症,也可发生于常规精液指标正常的不育症患者。其发生机制包括精子成熟障碍、凋亡异常和氧化应激过高等。由于很多文献报道其与自然妊娠和辅助生殖技术结局存在负相关,SDF检测已在男性不育症和辅助生殖技术中得到越来越广泛的应用。本专家共识复习和评估了SDF相关文献,对SDF的危险因素、检测方法、临床意义和处理等提出2项良好实践要点和9项推荐建议。本共识大部分推荐建议的证据和级别属于低或中等,表明仍需要进一步的研究证实临床应用SDF检测的价值。
