title: Sperm FISH analysis of a 46,XY,t(3;6)(p24;p21.2),inv (8)(p11;2q21.2) double chromosomal rearrangement.
abstract: A complex chromosome rearrangement (CCR) can be defined as a structural chromosomal aberration that involves at least three breakpoints located on two or more chromosomes. Highly unbalanced gametes may lead to infertility or congenital malformations. Here is reported a double rearrangement considered as the simplest possible CCR and, in a sense, not a true CCR, meiotic segregation for a 46,XY,t(3;6)(p24;p21.2),inv(8)(p11;2q21.2) male patient referred after his partner had undergone three early miscarriages. Sperm fluorescence in-situ hybridization was used to screen for translocation and inversion segregation and an interchromosomal effect (ICE) for 13 chromosomes not involved in CCR. The malsegregation rates for the reciprocal translocation and pericentric inversion were 61.2% and 1.7%, respectively. ICE analysis revealed that the observed chromosome aneuploidy rates of between 0.1% and 0.8% did not differ significantly from control values. A slight increase in cumulative ICE (P=0.049) was observed in the patient, relative to control spermatozoa (with rates of 4.6% and 3.1%). The sperm DNA fragmentation rate differed significantly from control values (5.0%; P=0.001). Reciprocal translocation had no impact on meiotic segregation of the pericentric inversion in this double rearrangement. No conclusion could be drawn regarding the impact of pericentric inversion on translocation.
authors.affiliation: Department of Reproductive Biology, Cytogenetics, Gynaecology and Obstetrics, CHIPS, Poissy, France. ferfouri.fatma@hotmail.fr
authors.forename: Fatma
authors.initials: F
authors.lastname: Ferfouri
authors.forename: Florence
authors.initials: F
authors.lastname: Boitrelle
authors.forename: Sylvie
authors.initials: S
authors.lastname: Tapia
authors.forename: Denise
authors.initials: D
authors.lastname: Molina Gomes
authors.forename: Jacqueline
authors.initials: J
authors.lastname: Selva
authors.forename: François
authors.initials: F
authors.lastname: Vialard
mesh_terms: D002869:Chromosome Aberrations; D007446:Chromosome Inversion; D002880:Chromosomes, Human, Pair 11; D002882:Chromosomes, Human, Pair 13; D002891:Chromosomes, Human, Pair 21; D002893:Chromosomes, Human, Pair 3; D002896:Chromosomes, Human, Pair 6; D002898:Chromosomes, Human, Pair 8; D053938:DNA Fragmentation; D006801:Humans; D017404:In Situ Hybridization, Fluorescence; D007248:Infertility, Male / Q000235:genetics*; D008297:Male; D055101:Semen Analysis; D013094:Spermatozoa / Q000002:abnormalities*; D014178:Translocation, Genetic