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Do we need to search for gr/gr deletions in infertile men in a clinical setting?

Hum. Reprod.2008 May;23(5):1193-9. Epub 2008 Mar 07
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摘要


BACKGROUND:Partial deletions of the AZFc region of the Y chromosome such as gr/gr deletions have been detected in infertile patients as well as in control groups. The impact of these gr/gr deletions on the etiology of male infertility remains unknown. In the present study, we investigated the presence of gr/gr deletions in Caucasian men. METHODS:gr/gr deletions were analyzed by using markers sY1291, sY1191 and sY1197 and by investigating the presence of single nucleotide variants (SNV) in DAZ and CDY1 genes in patients with azoospermia (n = 44), cryptozoospermia (n = 51) or severe oligozoospermia (n = 92). Control groups consisted of men with normal spermatogenesis on testicular biopsy (n = 33), normozoospermia (n = 278) or proven fertility (n = 83). RESULTS:We observed 20 gr/gr deletions, with eight in infertile patients (4.3%) and 12 in the control groups (3.0%), which was not significantly different. DAZ SNV analysis revealed eight different deletion patterns in patients and controls. CONCLUSIONS:In the present study, no significant differences in the frequency of gr/gr deletions between different patient and control groups were observed. We concluded that the relationship between gr/gr deletions and male infertility remains unclear and that it is too early to systematically test for gr/gr deletions for infertile couples seeking assisted reproduction treatment.

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