• PMID: 26931020
• Gene Name: DAZ4
• Condition: Spermatogenesis impairment, Male infertility
• Association: Associated
• Mutation: b2/b3-DAZ1/DAZ2, 3 gr/ gr-DAZ1/DAZ2, 10 gr/gr-DAZ3/DAZ4 deletions, 1 b2/b3- DAZ3/DAZ4 deletions
• Population size: 216
• Population details: 216 (121 infertile men with different degrees of spermatogenic impairment, 95 healthy donors)
• Sex: Male
• Infertility type: Male infertility
• Other associated phenotypes: Spermatogenesis impairment, Male infertility

[Association of the deleted DAZ gene copy related to gr/gr and b2/b3 deletions with spermatogenic impairment]

Wang YM, Li Q, Song LB, Zhang JY, Yang J, Song NH.

OBJECTIVE: To investigate the correlation of the deleted azoospermia (DAZ) gene copy related to gr/gr and b2/b3 deletions in the AZFc region with male spermatogenic impairment. METHODS: This study included 121 infertile men with different de- grees of spermatogenic impairment and 95 healthy donors from the sperm bank. Using PCR, PCR-RFLP, and Y chromosome specific sequence tagged sites (STS) , we analyzed the association of DAZ gene copy deletions related to gr/gr and b2/b3 deletions in the AZFc region with spermatogenic impairment. RESULTS: There were 15 cases of gr/gr deletion (12. 40% ) and 6 cases of b2/b3 deletion (4.96%) in the infertility group as compared with 13 cases of gr/gr deletion (13.68%) and 1 case of b2/b3 deletion (1.05%) in the control. Analysis of the DAZ-specific single nucleotide variant (SNV) loci revealed 11 gr/gr-DAZI/DAZ2 deletions (9.09%), 4 gr/gr-DAZ3/DAZ4 deletions (3.31%), and 6 b2/b3-DAZ1/DAZ2 deletions (4.96%) in the infertile men in comparison with 3 gr/ gr-DAZ1/DAZ2 deletions (3.16%), 10 gr/gr-DAZ3/DAZ4 deletions (10.53%), and 1 b2/b3- DAZ3/DAZ4 deletion (1.05%) in the control. CONCLUSION: Partial deletions of gr/gr and b2/b3 exist in both healthy men and male patients with different degrees of spermatogenic impairment and cannot be considered as a risk factor for spermatogenesis impairment. However, deletions of different DAZ duplicons in gr/gr and b2/b3 deletions have different effects on spermatogenesis. DAZ1/DAZ2 instead of DAZ3/DAZ4 deletions might be associated with spermatogenesis impairment. FAU - Wang, Ya-min AU - Wang YM FAU - Li, Quan AU - Li Q FAU - Song, Le-bin AU - Song LB FAU - Zhang, Jia-yi AU - Zhang JY FAU - Yang, Jie AU - Yang J