摘要目的:对一圆头精子症家系的DPY19L2基因进行变异分析，明确其遗传学病因。方法:应用全外显子组捕获测序及生物信息学技术对该家系基因组进行分析，Sanger测序及实时荧光定量PCR(quantitative real-time PCR, qRT-PCR)技术对致病基因的变异进行验证。结果:全外显子组测序分析、Sanger测序及qRT-PCR验证显示家系两患者及其母亲均存在DPY19L2基因c.384dup(p.Glu129*)杂合变异，两例患者及父亲存在覆盖DPY19L2基因全长约164.5 kb的大片段杂合缺失。结论:两例圆头精子症患者DPY19L2基因c.384dup(p.Glu129*)变异及DPY19L2基因缺失是其致病原因，符合常染色体隐性遗传规律。

abstractsObjective:To explore the molecular basis for two brothers affected with globozoospermia.Methods:Whole exome sequencing was carried out for both patients. Candidate variant was verified by Sanger sequencing and quantitative real-time PCR (qRT-PCR).Results:Whole exome sequencing, Sanger sequencing and qRT-PCR verification revealed a heterozygous c. 384dup (p.Glu129*) variant in the DPY19L2 gene in the two brothers and their mother. A large heterozygous deletion, spanning approximately 164.5 kb and encompassing the entire DPY19L2 gene, was detected on chromosome 12 of the two patients and their father.Conclusion:The c. 384dup (p.Glu129*) variant and deletion of the DPY19L2 gene probably underlie the pathogenesis of globozoospermia in the two patients, which was in keeping with the autosomal recessive inheritance of disease in this pedigree.