Prevalence and Molecular Characteristics of Y Chromosome Microdeletions in Infertile Males: A Single-Center Study

  • Ayşe Nur Kavasoğlu
  • Hüseyin Onay
  • Ayça Aykut
  • Burak Durmaz
  • Emin Karaca
  • Asude Durmaz
  • Ferda Özkınay

J Clin Res Pediatr Endocrinol 2015;7(2):74-74

In a number of infertile males, small deletions of specific genes located at Y chromosome are associated with spermatogenic failure. The aim of this study was to analyze the prevalence and clinicopathologic findings in patients with Y microdeletions. We retrospectively evaluated the records of 1069 Turkish infertile males referred to our molecular laboratory for Y microdeletion analysis between the period of 2010 and 2014. Polymerase chain reaction assay was used to detect Y chromosome microdeletions including SRY, sY95, AZFa, AZFb, and AZFc. Y chromosome microdeletions were found in 47 (4%) of the 1069 primary infertile males. Among 47 males with Y microdeletions, AZFc region microdeletions were found in 24 (51%), both AZFb and AZFc regions microdeletions in 7 (14.8%), sY95 microdeletion in 2 (4%), AZFb microdeletion in 1 (1%), and sY95, AZFa, AZFb and AZFc microdeletions in 1 (1%). The contribution of Y microdeletions to male infertility has been reported to be about 10%. The prevalence of Y chromosome microdeletions was found to be lower in our study. It has been considered that this may be due to the respectively higher contribution of autosomal recessive conditions to male infertility in our population which has higher frequency of consanguineous marriages. Similar to the previous studies, the AZFc region was the most frequently involved region in microdeletion process in this study. Knowing the involved region/regions in men with Y microdeletions is essential for genetic counseling and it helps decision-making for assisted reproductive techniques.

Keywords: Y microdeletion, primary infertility