Sperm nuclear architecture is locally modified in presence of a Robertsonian translocation t(13;17).

TitleSperm nuclear architecture is locally modified in presence of a Robertsonian translocation t(13;17).
Publication TypeJournal Article
Year of Publication2013
AuthorsAcloque, H, Bonnet-Garnier, A, Mompart, F, Pinton, A, Yerle-Bouissou, M
JournalPLoS One
Volume8
Issue10
Paginatione78005
Date Published2013
ISSN1932-6203
KeywordsAnimals, Chromosome Positioning, Infertility, Male, Male, Meiosis, Spermatozoa, Swine, Translocation, Genetic
Abstract

In mammals, the non-random organization of the sperm nucleus supports an early function during embryonic development. Altering this organization may interfere with the zygote development and reduce fertility or prolificity. Thus, rare studies on sperm cells from infertile patients described an altered nuclear organization that may be a cause or a consequence of their respective pathologies. Thereby, chromosomal rearrangements and aneuploidy can be studied not only for their adverse effects on production of normal/balanced gametes at meiosis but also for their possible impact on sperm nuclear architecture and the epigenetic consequences of altered chromosome positioning. We decided to compare the global architecture of sperm nuclei from boars, either with a normal chromosome composition or with a Robertsonian translocation involving chromosomes 13 and 17. We hypothesized that the fusion between these chromosomes may change their spatial organization and we examined to what extend it could also modify the global sperm nuclear architecture. Analysis of telomeres, centromeres and gonosomes repartition does not support a global nuclear disorganization. But specific analysis of chromosomes 13 and 17 territories highlights an influence of chromosome 17 for the positioning of the fused chromosomes within the nucleus. We also observed a specific clustering of centromeres depending of the chromosome subtypes. Altogether our results showed that chromosome fusion does not significantly alter sperm nucleus architecture but suggest that centromere remodelling after chromosome fusion locally impacts chromosome positioning.

DOI10.1371/journal.pone.0078005
Alternate JournalPLoS ONE
PubMed ID24205066
PubMed Central IDPMC3815027