[Sperm-fluorescence in situ hybridization analysis in patients with pericentric inversions of Y chromosome].

Objective To analyze the sex chromosome meiotic segregation in inv(Y)patients by fluorescence in situ hybridization(FISH).MethodsConventional cytogenetic procedures(GTG and CBG banding)and FISH were performed on metaphase chromosome.Three-color FISH was performed on sperm samples using a probe mixture containing CEPX,Tel Xp/Yp and Tel Xq/Yq to investigate the sex chromosome segregation of five inv(Y)(p11.1q11.2)carriers.A healthy man with normal semen parameters was used as control.Results There was no statistical difference in the abnormal sex chromosome number and recombination frequencies in each spermatozoon from the patient in comparison with that in the control.Conclusion There was no apparent sex chromosome abnormality in the sperm of the inv(Y)(D11.1q11.2)carriers.Sperm-FISH allows further understanding of the sex chromosome segregation pattern and an accurate genetic counseling. Key words: fluorescence in situ hybridization; inv(Y); spermatozoa