Publication details

Sperm and embryo analysis of similar t(7;10) translocations transmitted in two families

Authors

VOZDOVÁ Miluše ORÁČOVÁ Eva MUSILOVÁ Petra KAŠÍKOVÁ Kateřina PŘINOSILOVÁ Petra GAILLYOVÁ Renata RUBEŠ Jiří

Year of publication 2011
Type Article in Periodical
Magazine / Source Fertility and Sterility
MU Faculty or unit

Faculty of Medicine

Citation
Doi http://dx.doi.org/10.1016/j.fertnstert.2011.04.042
Field Gynaecology and obstetrics
Keywords Embryo; FISH; interchromosomal effect; meiotic segregation; reciprocal translocation; sperm
Description Objective: To compare the sperm meiotic segregation profiles in two men from families with similar t(7;10) translocations and determine the frequency of unbalanced sperm and preimplantation embryos in one couple. Design: Analysis of sperm nuclei and blastomeres by fluorescence in situ hybridization (FISH). Setting: Research institute. Patient(s): Carriers of balanced translocations t(7;10)(q34;q24) and t(7; 10)(q36;q24.3). Intervention(s): Multicolor FISH using probes for chromosomes 7, 10, 8, 18, 21, X, and Y on sperm and preimplantation genetic diagnosis (PGD) of blastomeres. Main Outcome Measure(s): Frequencies of meiotic segregation products in sperm and blastomeres and sperm aneuploidy of chromosomes 8, 18, 21, X, and Y. Result(s): Similar meiotic segregation patterns, with preferential alternate segregation (50.6% in patient P1, 48.1% in P2) followed by adjacent 1, adjacent 2 and 3:1 segregations, were observed in the sperm of the two carriers. An interchromosomal effect on the sex chromosomes was found when compared with disomy frequencies reported in control donors. The results of preimplantation genetic diagnosis in the first couple are roughly consistent with the sperm analysis results. Conclusion(s): Carriers of similar translocations show similar segregation profiles. The in vitro fertilization method accompanied by preimplantation genetic diagnosis increases the chance of translocation carriers fathering a healthy child.

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