Expression of CDY1 may identify complete spermatogenesis
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Updated: Oct 9, 2026
Cytological Analysis of Spermatogenesis: Live and Fixed Preparations of Drosophila Testes
Published on: January 20, 2014
S E Kleiman1, A Lagziel, L Yogev
1Institute for the Study of Fertility, Lis Maternity Hospital, Tel Aviv Sourasky Medical Center, The Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel. ser@tasmc.health.gov.il
Objective:
To investigate the expression of deleted in azoospermia (DAZ), RNA-binding motif (RBM), and chromodomain y1 (CDY1) genes in the testes of men with azoospermia with variable histopathologies.
Design:
Prospective study.
Setting:
Andrology laboratory of a university-affiliated maternity hospital.
Patient(S):
Sixty-six men with azoospermia.
Intervention(S):
Testicular sperm extraction.
Main Outcome Measure(S):
The results of gene expression in testicular tissue tested by RT-PCR were correlated with those of histopathologically and microscopically examined minced testicular tissue. Y chromosome microdeletion testing and karyotyping were performed, as was direct sequencing of CDY1-PCR products.
Result(S):
CDY1-minor expression was detected in all biopsies in which mature spermatids/spermatozoa were observed by histological analysis and/or in the minced tissue. CDY1-minor expression was also detected in two biopsies with arrest at the spermatocyte stage during which no mature spermatids/spermatozoa were observed. A previously unreported CDY1-minor alternative splicing transcript was identified. DAZ and RBM gene expressions were detected in all biopsies in which at least a few germinal cells in early stages were found and in one biopsy histologically determined as Sertoli cell only.
Conclusion(S):
Our preliminary results suggest that CDY1-minor expression might increase the prospect for complete spermatogenesis, while RBM and DAZ expression can only be indicative of the presence of germinal cells.
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