Useful marker for the estimation of a recombination pair in the partial azoospermia factor c (gr/gr) deletion using quantitative real-time polymerase chain reaction.
Reprod Med Biol 2007;
6:91-97. [PMID:
29662405 DOI:
10.1111/j.1447-0578.2007.00171.x]
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Abstract
Background and aims: Azoospermia factor c (AZFc) microdeletions are associated with male infertility and are caused by intrachromosal recombination between homologous repetitive sequence segments. Partial AZFc deletion (gr/gr) has been reported in male factor infertility. In the present study, we established detecting the copy number using quantitative real-time polymerase chain reaction (qRT-PCR) with the genome DNA, and assessed the association of the recombination pair set of gr/gr deletion and deleted in azoospermia copies. Furthermore, we determined the clinical significance of differential recombination patterns of gr/gr deletion, and compared them with azoospermia and proven fertile volunteers, with both groups having gr/gr deleted Japanese subjects. Materials and methods: A total of 16 Japanese subjects with idiopathic azoospermia, and 13 proven fertile men with gr/gr deletion, were studied. qRT-PCR was used for the estimation of an identical site number. Results: The g1/g2 deletion was found in 69.2% (9/13) in proven fertile men and in 75% (12/16) of idiopathic infertile men. The gr/gr deletion could result in the recombination of g1/g2 segments. Furthermore, there was no difference in the position of deletion between azoospermic patients and controls (P = 0.59). Conclusion: There was no association between the loss of DAZ cluster and azoospermia in gr/gr deletion. This suggests that most of the partial deletions are neutral variants.
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