Frontiers in Genetics (Dec 2021)

Novel Bi-Allelic Variants of FANCM Cause Sertoli Cell-Only Syndrome and Non-Obstructive Azoospermia

  • Yuxiang Zhang,
  • Yuxiang Zhang,
  • Peng Li,
  • Peng Li,
  • Nachuan Liu,
  • Nachuan Liu,
  • Tao Jing,
  • Tao Jing,
  • Zhiyong Ji,
  • Chao Yang,
  • Chao Yang,
  • Liangyu Zhao,
  • Liangyu Zhao,
  • Ruhui Tian,
  • Ruhui Tian,
  • Huixing Chen,
  • Huixing Chen,
  • Yuhua Huang,
  • Yuhua Huang,
  • Erlei Zhi,
  • Erlei Zhi,
  • Ningjing Ou,
  • Haowei Bai,
  • Haowei Bai,
  • Yuchuan Zhou,
  • Zheng Li,
  • Zheng Li,
  • Chencheng Yao,
  • Chencheng Yao

DOI
https://doi.org/10.3389/fgene.2021.799886
Journal volume & issue
Vol. 12

Abstract

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Non-obstructive azoospermia (NOA) is the most severe disease in male infertility, but the genetic causes for the majority of NOA remain unknown. FANCM is a member of Fanconi Anemia (FA) core complex, whose defects are associated with cell hypersensitivity to DNA interstrand crosslink (ICL)-inducing agents. It was reported that variants in FANCM (MIM: 609644) might cause azoospermia or oligospermia. However, there is still a lack of evidence to explain the association between different FANCM variants and male infertility phenotypes. Herein, we identified compound heterozygous variants in FANCM in two NOA-affected brothers (c. 1778delG:p. R593Qfs*76 and c. 1663G > T:p. V555F), and a homozygous variant in FANCM (c. 1972C > T:p. R658X) in a sporadic case with NOA, respectively. H&E staining and immunohistochemistry showed Sertoli cell-only Syndrome (SCOS) in the three patients with NOA. Collectively, our study expands the knowledge of variants in FANCM, and provides a new insight to understand the genetic etiology of NOA.

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