Predictive value of sperm-FISH analysis on the outcome of preimplantation genetic diagnosis (PGD) for a pericentric inversion inv5(p15.3q11.2) carrier
| Autor: | Tal Anahory, A. Mace, Samir Hamamah, Bernard Hedon, F. Pellestor, I. Bernicot, C. Dechanet |
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| Rok vydání: | 2010 |
| Předmět: |
Adult
Male Infertility Heterozygote Chromosome Disorders Semen Biology Preimplantation genetic diagnosis Meiosis medicine Humans In Situ Hybridization Fluorescence Preimplantation Diagnosis Chromosomal inversion Genetics Genetic Carrier Screening Rehabilitation Obstetrics and Gynecology Chromosome Embryo medicine.disease Spermatozoa Sperm Reproductive Medicine Chromosome Inversion Chromosomes Human Pair 5 |
| Zdroj: | Human Reproduction. 25:1818-1823 |
| ISSN: | 1460-2350 0268-1161 |
| DOI: | 10.1093/humrep/deq101 |
| Popis: | Pericentric inversions (PIs) are structural chromosomal abnormalities, potentially associated with infertility or multiple miscarriages. More rarely, at meiosis, odd numbers of genetic recombinations within the inversion loop produce recombinant gametes which may lead to aneusomy of recombination in the offspring.We report a FISH segregation analysis of an inv5(p15.3q11.2) carrier, both in sperm and blastomeres. In sperm, we directly evaluated the proportion of recombinant gametes and compared the results with chromosomal abnormalities found in blastomeres collected from embryos obtained following a preimplantation genetic diagnosis (PGD) procedure.A total of 7006 sperm nuclei were analyzed. The size of the inverted segment represented 27% of the total length of chromosome 5. The frequencies of balanced chromosomes (normal or inverted), recombinant chromosomes and unbalanced combinations were 97.1, 0.17 and 2.73%, respectively. Of six embryos, PGD FISH analysis revealed that one was a balanced embryo, whereas five were unbalanced and there were no recombinants.This study demonstrated the value of sperm-FISH analysis in providing reproductive genetic counseling for PI carriers. Our study also highlights the clinical relevance of performing PGD instead of prenatal diagnosis. |
| Databáze: | OpenAIRE |
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