[Investigation of occurrence of deletion of the DAZ gene among men with azoospermia and severe oligozoospermia]. / Badania nad wystepowaniem delecji w genie DAZ u mezczyzn z azoospermia i cieza oligozooospermia.

A genetic etiology has been proposed for severe forms of idiopathic male infertility and involvement of variety of genes is critical for the regulation of spermatogenesis. The role of DAZ gene is supported by its exclusive expression in the testis and deletions of DNA sequence within this gene are associated with azoospermia or severe oligozoospermia. The objective of our study was to validate the PCR strategy, using primers based on cDNA sequence, for the detection of genomic aberration among males with azoospermia or severe oligozoospermia who carry mutations in the DAZ gene. Using the PCR technology, deletion of the DAZ gene in one infertile male with azoospermia was detected. No deletion was detected in any of the remaining 15 patients.

[Studies on DNA content in sperm of men with oligozoospermia]. / Badania nad zawartoscia DNA w plemnikach mezczyzn z oligozoospermia.

The aim of our study was to analysis the ploidy of spermatozoa from oligozoospermic individuals. The study was performed in 48 patients with oligozoospermia. Spermatozoal DNA was analysed using MagiCal imaging cytometry. The percentage of aneuploid cells was determined using CYT-2 program. The results indicated aneuploidy in 73% of the examined patients. The amount of cells with abnormal DNA content ranged from 30 to 100%. Monitoring of the DNA in human spermatozoa may have practical applications in establishing the reasons for infertility as well as for screening of the semen for assisted reproduction techniques.