Pericentric inversion of chromosome 9(inv[9])is a common chromosomal structural variant,but its impact on clinical outcomesremains debated.The screening criteria of sperm banks are rarely mentioned to individuals with...Pericentric inversion of chromosome 9(inv[9])is a common chromosomal structural variant,but its impact on clinical outcomesremains debated.The screening criteria of sperm banks are rarely mentioned to individuals with inv(9).In this study,we evaluatedthe fertility of sperm donors with inv(9)who met eligibility criteria for sperm banks(inv[9]-eligible donors).From March 2004 toMay 2022,chromosomal analysis of 16124 sperm donors at CITIC-Xiangya Human Sperm Bank in Hunan Province(Changsha,China)found that 251(1.6%)had chromosome variations,with inv(9)being the most prevalent at 1.1%.All 169 inv(9)-eligibledonors were contacted to collect fertility outcome data,along with 206 eligible donors without inv(9)as controls.In addition,semen samples from inv(9)-eligible donors and eligible donors underwent assessments of sperm fluorescence in situ hybridization(FISH),mitochondrial membrane potential,DNA fragmentation index,acrosome integrity,reactive oxygen species(ROS),andsperm morphology.Results showed that inv(9)did not significantly increase reproductive risks overall.Despite detecting ROSlevel differences,the clinical impact may be insignificant.This study provides new data on the inv(9)population that can serveas a valuable reference for decision-making by sperm banks as well as for genetic counseling and clinical guidance for individualscarrying inv(9)variant.展开更多
目的:探讨用精子荧光原位杂交(fluorescence in situ hybridization,FISH)分析男性染色体臂间倒位携带者的减数分裂结果。方法:对4例男性染色体臂间倒位携带者的精子通过化学方法解聚,利用双色FISH,分析精子染色体组成并推断其分离类型...目的:探讨用精子荧光原位杂交(fluorescence in situ hybridization,FISH)分析男性染色体臂间倒位携带者的减数分裂结果。方法:对4例男性染色体臂间倒位携带者的精子通过化学方法解聚,利用双色FISH,分析精子染色体组成并推断其分离类型。结果:4例染色体臂间倒位携带者中2例为46,XY,inv(9)(p11q12),1例为46,XY,inv(9)(p11q13),1例为46,XY,inv(6)(p22q24),其倒位片段长度分别占整条染色体的16.0%、16.0%、21.0%和76.0%,其重组精子分别为0.2%、0.4%、0.3%和43.9%(del(p)/dup(q)占22.4﹪,del(q)/dup(p)占21.5﹪)。结论:染色体臂间倒位携带者减数分裂的重组发生跟倒位片段占整条染色体长度比例有关。FISH分析可了解重组后染色体不平衡精子的比率,有助于提供更准确的遗传咨询。展开更多
目的探讨Y染色体臂问倒位的遗传学效应。方法外周血淋巴细胞培养G显带核型分析及多重PCR方法扩增与不育最相关的18个Y染色体长臂连锁的非多态短DNA片断(分别位于AZF的几个亚区)。结果在两例Y染色体臂间倒位患者中未发现有A Z F区的微缺...目的探讨Y染色体臂问倒位的遗传学效应。方法外周血淋巴细胞培养G显带核型分析及多重PCR方法扩增与不育最相关的18个Y染色体长臂连锁的非多态短DNA片断(分别位于AZF的几个亚区)。结果在两例Y染色体臂间倒位患者中未发现有A Z F区的微缺失。结论发生在人类的inv(Y)和其它物种(如灵长类)一样是一种多态性,通常不具有病理意义。展开更多
目的探讨一例源于亲代臂间倒位的7号染色体重组胎儿超声及分子遗传特征。方法对超声提示颈项透明层增厚、颅脑发育异常的胎儿行染色体G显带分析及染色体微阵列分析,并对胎儿父母双方行染色体G显带分析以明确来源。以“7号染色体臂间倒...目的探讨一例源于亲代臂间倒位的7号染色体重组胎儿超声及分子遗传特征。方法对超声提示颈项透明层增厚、颅脑发育异常的胎儿行染色体G显带分析及染色体微阵列分析,并对胎儿父母双方行染色体G显带分析以明确来源。以“7号染色体臂间倒位”或“pericentric inversion of chromosome7”为检索词在PubMed、中文期刊全文数据库(CNKI)、万方数据知识服务平台及维普中文科技期刊数据库检索,收集并分析检索到的源于亲代臂间倒位7号染色体重组患者临床资料。结果该例超声提示胎儿多发异常,表现为全前脑、唇腭裂、淋巴管水囊瘤、全身皮肤水肿及脐膨出声像;胎儿染色体核型为46,XN,rec(7)dup(7p)inv(7)(p21q35),胎儿父亲染色体核型为46,XY,inv(7)(p21q35),胎儿母亲染色体核型正常。染色体微阵列分析提示胎儿7号染色体7p21.3-pter位置发生重复、7q35-qter位置发生缺失,这些区域涉及FAM20C和SHH、EN2等具有临床意义的候选基因。检索文献后共收集4例源于亲代臂间倒位的7号染色体重组患者临床资料,但均为出生后病例并伴不同程度肢体异常,其中一例与该例有相近重复及缺失的染色体区域,主要表现为严重智力障碍、头小畸形、矮小及形态异常。结论臂间倒位可引起子代染色体重组从而导致胎儿发育异常,7号染色体重组涉及的FAM20C和SHH基因与唇腭裂和全前脑等表型相关,通过染色体核型分析及染色体微阵列分析可明确遗传病因,指导遗传咨询。展开更多
基金financial supported by National Natural Science Foundationof China(No.82001634)the China Postdoctoral Science Foundation(No.2019M661521).
文摘Pericentric inversion of chromosome 9(inv[9])is a common chromosomal structural variant,but its impact on clinical outcomesremains debated.The screening criteria of sperm banks are rarely mentioned to individuals with inv(9).In this study,we evaluatedthe fertility of sperm donors with inv(9)who met eligibility criteria for sperm banks(inv[9]-eligible donors).From March 2004 toMay 2022,chromosomal analysis of 16124 sperm donors at CITIC-Xiangya Human Sperm Bank in Hunan Province(Changsha,China)found that 251(1.6%)had chromosome variations,with inv(9)being the most prevalent at 1.1%.All 169 inv(9)-eligibledonors were contacted to collect fertility outcome data,along with 206 eligible donors without inv(9)as controls.In addition,semen samples from inv(9)-eligible donors and eligible donors underwent assessments of sperm fluorescence in situ hybridization(FISH),mitochondrial membrane potential,DNA fragmentation index,acrosome integrity,reactive oxygen species(ROS),andsperm morphology.Results showed that inv(9)did not significantly increase reproductive risks overall.Despite detecting ROSlevel differences,the clinical impact may be insignificant.This study provides new data on the inv(9)population that can serveas a valuable reference for decision-making by sperm banks as well as for genetic counseling and clinical guidance for individualscarrying inv(9)variant.
文摘目的:探讨用精子荧光原位杂交(fluorescence in situ hybridization,FISH)分析男性染色体臂间倒位携带者的减数分裂结果。方法:对4例男性染色体臂间倒位携带者的精子通过化学方法解聚,利用双色FISH,分析精子染色体组成并推断其分离类型。结果:4例染色体臂间倒位携带者中2例为46,XY,inv(9)(p11q12),1例为46,XY,inv(9)(p11q13),1例为46,XY,inv(6)(p22q24),其倒位片段长度分别占整条染色体的16.0%、16.0%、21.0%和76.0%,其重组精子分别为0.2%、0.4%、0.3%和43.9%(del(p)/dup(q)占22.4﹪,del(q)/dup(p)占21.5﹪)。结论:染色体臂间倒位携带者减数分裂的重组发生跟倒位片段占整条染色体长度比例有关。FISH分析可了解重组后染色体不平衡精子的比率,有助于提供更准确的遗传咨询。
文摘目的探讨Y染色体臂问倒位的遗传学效应。方法外周血淋巴细胞培养G显带核型分析及多重PCR方法扩增与不育最相关的18个Y染色体长臂连锁的非多态短DNA片断(分别位于AZF的几个亚区)。结果在两例Y染色体臂间倒位患者中未发现有A Z F区的微缺失。结论发生在人类的inv(Y)和其它物种(如灵长类)一样是一种多态性,通常不具有病理意义。
文摘目的探讨一例源于亲代臂间倒位的7号染色体重组胎儿超声及分子遗传特征。方法对超声提示颈项透明层增厚、颅脑发育异常的胎儿行染色体G显带分析及染色体微阵列分析,并对胎儿父母双方行染色体G显带分析以明确来源。以“7号染色体臂间倒位”或“pericentric inversion of chromosome7”为检索词在PubMed、中文期刊全文数据库(CNKI)、万方数据知识服务平台及维普中文科技期刊数据库检索,收集并分析检索到的源于亲代臂间倒位7号染色体重组患者临床资料。结果该例超声提示胎儿多发异常,表现为全前脑、唇腭裂、淋巴管水囊瘤、全身皮肤水肿及脐膨出声像;胎儿染色体核型为46,XN,rec(7)dup(7p)inv(7)(p21q35),胎儿父亲染色体核型为46,XY,inv(7)(p21q35),胎儿母亲染色体核型正常。染色体微阵列分析提示胎儿7号染色体7p21.3-pter位置发生重复、7q35-qter位置发生缺失,这些区域涉及FAM20C和SHH、EN2等具有临床意义的候选基因。检索文献后共收集4例源于亲代臂间倒位的7号染色体重组患者临床资料,但均为出生后病例并伴不同程度肢体异常,其中一例与该例有相近重复及缺失的染色体区域,主要表现为严重智力障碍、头小畸形、矮小及形态异常。结论臂间倒位可引起子代染色体重组从而导致胎儿发育异常,7号染色体重组涉及的FAM20C和SHH基因与唇腭裂和全前脑等表型相关,通过染色体核型分析及染色体微阵列分析可明确遗传病因,指导遗传咨询。
