对法医学相关的DYS549、DYS527和DYS459基因座在男性不育症人群中的缺失、重复调查

doi:10.3724/SP.J.1005.2014.0786

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HEREDITAS(Beijing) ›› 2014, Vol. 36 ›› Issue (8): 786-792.doi: 10.3724/SP.J.1005.2014.0786

• Research Articles • Previous Articles Next Articles

Identification of null and duplicated alleles for forensic DYS549, DYS527 and DYS459 in male infertility population

Yueli Wang¹, Junjie Ye², Zongfang Li³, Shui Zheng², Li Ma², Hai Guo¹, Lijuan Yang², Baowen Cheng⁴

1. Kunming General Hospital of the PLA, Kunming 650032, China;
2. Key Laboratory for Fertility Regulation and Birth Health of Minority Nationalities of Yunnan Province, Judicial Expertise Centre, Yunnan Population and Family Planning Research Institute, Kunming 650021, China;
3. The First Affiliated Hospital of Kunming Medical University, Kunming 650021, China;
4. Department of Public Security of Yunnan Province, Kunming 650228, China

Received:2013-12-09 Online:2014-08-20 Published:2013-07-19

Abstract

Abstract: DYS549, DYS527, and DYS459 loci, located on the azoospermia factor (AZF) region and widely used in forensic and pedigree analysis, may be specifically altered in infertile patients, which will obscure the result of individual identification using Y-STR (Y chromosome short tandem repeat). In this study, we determined the AZF polymorphism by STS^-/- (sequence tagged site) and DAZ, CDY1 gene copy numbers, and screened the samples by 14 Y-STR loci to disclose the unusual genotype of Y-STR in male infertility population. The 240 infertile males including non-obstructive azoospermia, severe oligozoospermia and congenital bilateral absence of vas deferens (CBVAD) were analyzed with a modified multiplex PCR system for AZF microdeletion STSs. AZF microdeletions were found in 40 cases (16.67%) (AZFa deletion, two cases; AZFb deletion, two cases; AZFc deletion, 30 cases; AZFb+c deletion, six cases). Further screening by the 14 Y-STR loci in samples with microdeletions, we found DYS549 allelic loss in all the cases with AZFb deletion, DYS527 and DYS459 allelic loss in all the cases with AZFc deletion, DYS549, DYS527, and DYS459 allelic loss in all the cases with AZFb+c deletion. Ten patients (4.17%) with AZFc partial duplication (one CBVAD case, two non-obstructive azoospermia cases, seven severe oligozoospermia cases) were found by DAZ and CDY1 gene dosage analysis. In conclusion, the unusual patterns of DYS549, DYS527, and DYS459 are caused by genetic defects rather than experimental bias. Revealing the locus heterogeneity in male infertility population can enrich the Y-STR database and assist in interpreting abnormal STR genotype in forensic DNA testing.

Key words: AZF, DYS549, DYS527, DYS459, forensic identification, Y chromosome microdeletion

Yueli Wang, Junjie Ye, Zongfang Li, Shui Zheng, Li Ma, Hai Guo, Lijuan Yang, Baowen Cheng. Identification of null and duplicated alleles for forensic DYS549, DYS527 and DYS459 in male infertility population[J]. HEREDITAS(Beijing), 2014, 36(8): 786-792.

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Identification of null and duplicated alleles for forensic DYS549, DYS527 and DYS459 in male infertility population

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