Clinical, cytogenetic, and molecular analysis with 46,XX male sex reversal syndrome: case reports

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• 作者：Xuefeng Gao (1)
  Guian Chen (1)
  Jing Huang (1)
  Quan Bai (1)
  Nan Zhao (1)
  Minjie Shao (1)
  Liping Jiao (1)
  Yanling Wei (1)
  Liang Chang (1)
  Dan Li (1)
  Liping Yang (1)
  
• 关键词：46 ; XX male ; Sex reversal ; SRY gene
• 刊名：Journal of Assisted Reproduction and Genetics
• 出版年：2013
• 出版时间：March 2013
• 年：2013
• 卷：30
• 期：3
• 页码：431-435
• 全文大小：175KB
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• 作者单位：Xuefeng Gao (1)
  Guian Chen (1)
  Jing Huang (1)
  Quan Bai (1)
  Nan Zhao (1)
  Minjie Shao (1)
  Liping Jiao (1)
  Yanling Wei (1)
  Liang Chang (1)
  Dan Li (1)
  Liping Yang (1)
  
  1. The Center of Assisted Reproduction, Department of Obstetrics and Gynecology, Peking University Third Hospital, Beijing, 100191, People鈥檚 Republic of China
  
• ISSN：1573-7330

文摘

Purpose To investigate the clinical characteristics of different categories of sex-reversed 46,XX individuals and their relationships with chromosomal karyotype and the SRY gene. Methods Chromosome karyotyping for peripheral blood culture and multi-PCR and FISH were performed. Results Endocrinological data showed that their endocrine hormone levels were similar to that observed for Klinefelter syndrome, with higher FSH and LH levels and lower T levels. Chromosome karyotyping for peripheral blood culture revealed 46, XX complement for 11 males. Molecular studies showed that there were locus deletions at SY84, SY86, SY127, SY134, SY254 and SY255 in AZF on chromosome Y in 9 cases, with the SRY gene present at the terminus of the X chromosome short arm. In one case, besides 6 locus deletions in AZF, there was also SRY gene deletion. In another case, there were locus deletions only at SY254 and SY255, with SY84, SY86, SY127 SY134 loci and SRY present. Conclusions The majority (10/11) of 46,XX males were SRY positive, with the SRY gene translocated into the terminus of the X chromosome short arm. These patients were caused mainly by an X/Y chromosomal inter-change during paternal meiosis, leading to the differentiation of primary gonads into testes. Only a single patient (1/11) was SRY-negative, in which there might be some unknown downstream genes involved in sex determination.