Parental Effect of DNA (Cytosine-5) Methyltransferase 1 on Grandparental-Origin-Dependent Transmission Ratio Distortion in Mouse Crosses and Human Families - CNRS - Centre national de la recherche scientifique Accéder directement au contenu
Article Dans Une Revue Genetics Année : 2008

Parental Effect of DNA (Cytosine-5) Methyltransferase 1 on Grandparental-Origin-Dependent Transmission Ratio Distortion in Mouse Crosses and Human Families

Lanjian Yang
  • Fonction : Auteur
Moises Freitas Andrade
  • Fonction : Auteur
Sanny Moussette
  • Fonction : Auteur
Geneviève Geneau
  • Fonction : Auteur
Donna Sinnett
  • Fonction : Auteur
Alexandre Belisle
  • Fonction : Auteur
Celia Greenwood
  • Fonction : Auteur
Anna Naumova
  • Fonction : Auteur

Résumé

Transmission ratio distortion (TRD) is a deviation from the expected Mendelian 1:1 ratio of alleles transmitted from parents to offspring and may arise by different mechanisms. Earlier we described a grandparental-origin-dependent sex-of-offspring-specific TRD of maternal chromosome 12 alleles closely linked to an imprinted region and hypothesized that it resulted from imprint resetting errors in the maternal germline. Here, we report that the genotype of the parents for loss-of-function mutations in the Dnmt1 gene influences the transmission of grandparental chromosome 12 alleles. More specifically, maternal Dnmt1 mutations restore Mendelian transmission ratios of chromosome 12 alleles. Transmission of maternal alleles depends upon the presence of the Dnmt1 mutation in the mother rather than upon the Dnmt1 genotype of the offspring. Paternal transmission mirrors the maternal one: live-born offspring of wild-type fathers display 1:1 transmission ratios, whereas offspring of heterozygous Dnmt1 mutant fathers tend to inherit grandpaternal alleles. Analysis of allelic transmission in the homologous region of human chromosome 14q32 detected preferential transmission of alleles from the paternal grandfather to grandsons. Thus, parental Dnmt1 is a modifier of transmission of alleles at an unlinked chromosomal region and perhaps has a role in the genesis of TRD.

Dates et versions

hal-01848918 , version 1 (25-07-2018)

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Citer

Stéphane Labialle, Lanjian Yang, Moises Freitas Andrade, Sanny Moussette, Geneviève Geneau, et al.. Parental Effect of DNA (Cytosine-5) Methyltransferase 1 on Grandparental-Origin-Dependent Transmission Ratio Distortion in Mouse Crosses and Human Families. Genetics, 2008, 178 (1), pp.35 - 45. ⟨10.1534/genetics.107.081562⟩. ⟨hal-01848918⟩
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