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Expression of CDY1 may identify complete spermatogenesis
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
Fertility and Sterility
|February 13, 2001
Summary
Investigating gene expression in male azoospermia, this study found Deleted in Azoospermia (DAZ) and RNA-binding motif (RBM) genes indicate germ cell presence. Chromodomain Y1 (CDY1) minor expression may suggest potential for complete spermatogenesis.
Area of Science:
- Reproductive biology and genetics.
- Male infertility research.
Background:
- Azoospermia, characterized by a complete absence of sperm in ejaculate, is a significant cause of male infertility.
- Identifying genetic markers associated with spermatogenesis is crucial for understanding and potentially treating azoospermia.
Purpose of the Study:
- To examine the expression patterns of Deleted in Azoospermia (DAZ), RNA-binding motif (RBM), and Chromodomain Y1 (CDY1) genes in testicular tissue of men with azoospermia.
- To correlate gene expression with varying histopathological findings in azoospermic testes.
Main Methods:
- Prospective study involving 66 men with azoospermia undergoing testicular sperm extraction.
- Gene expression analysis using RT-PCR on testicular tissue.
- Histopathological and microscopic examination of minced testicular tissue.
- Y chromosome microdeletion testing, karyotyping, and direct sequencing of CDY1-PCR products.
Main Results:
- CDY1-minor expression was detected in samples with mature spermatids/spermatozoa and in some with spermatocyte arrest.
- A novel CDY1-minor alternative splicing transcript was identified.
- DAZ and RBM gene expression were present in samples with early-stage germ cells and even in Sertoli cell-only syndrome.
Conclusions:
- CDY1-minor expression may be a positive indicator for the potential of achieving complete spermatogenesis.
- DAZ and RBM gene expression primarily indicate the presence of germ cells, regardless of their developmental stage.