Journal
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
Volume 103, Issue 46, Pages 17308-17312Publisher
NATL ACAD SCIENCES
DOI: 10.1073/pnas.0607090103
Keywords
agouti; inheritance
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Funding
- NCI NIH HHS [1R01 CA115768-01, R01 CA115768] Funding Source: Medline
- NIMHD NIH HHS [P60 MD000222, P60 MD00222] Funding Source: Medline
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Environmental effects on phenotype can be mediated by epigenetic modifications. The epigenetic state of the murine A(vy) allele is highly variable, and determines phenotypic. effects that vary in a mosaic spectrum that can be shifted by in utero exposure to methyl donor supplementation. We have asked if methyl donor supplementation affects the germ-line epigenetic state of the A(vy) allele. We find that the somatic epigenetic state of A(vy) is affected by in utero methyl donor supplementation only when the allele is paternally contributed. Exposure to methyl donor supplementation during midgestation shifts A(vy) phenotypes not only in the mice exposed as fetuses, but in their offspring. This finding indicates that methyl donors can change the epigenetic state of the A(vy) allele in the germ line, and that the altered state is retained through the epigenetic resetting that takes place in gametogenesis and embryogenesis. Thus a mother's diet may have an enduring influence on succeeding generations, independent of later changes in diet. Although other reports have suggested such heritable epigenetic changes, this study demonstrates that a specific mammalian gene can be subjected to germ-line epigenetic change.
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