Review
Epigenetic inheritance and evolution: A paternal perspective on dietary influences

https://doi.org/10.1016/j.pbiomolbio.2015.02.008Get rights and content
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Abstract

The earliest indications for paternally induced transgenerational effects from the environment to future generations were based on a small number of long-term epidemiological studies and some empirical observations. Only recently have experimental animal models and a few analyses on human data explored the transgenerational nature of phenotypic changes observed in offspring. Changes include multiple metabolic disorders, cancer and other chronic diseases. These phenotypes cannot always be explained by Mendelian inheritance, DNA mutations or genetic damage. Hence, a new compelling theory on epigenetic inheritance is gaining interest, providing new concepts that extend Darwin's evolutionary theory. Epigenetic alterations or “epimutations” are being considered to explain transgenerational inheritance of parentally acquired traits. The responsible mechanisms for these epimutations include DNA methylation, histone modification, and RNA-mediated effects. This review explores the literature on a number of time-dependent environmentally induced epigenetic alterations, specifically those from dietary exposures. We suggest a role for the male germ line as one of nature's tools to capture messages from our continuously changing environment and to transfer this information to subsequent generations. Further, we open the discussion that the paternally inherited epigenetic information may contribute to evolutionary adaptation.

Keywords

Sperm
Epigenetics
Evolution
Transgenerational
Paternal
Diet

Abbreviations

ALT
alanine aminotransferase
BMI
Body Mass Index
DMRs
differentially methylated regions
DNMT
DNA methyltransferase
HDAC
histone deacetylase
PGC
primordial germ cells
ROS
reactive oxygen species
SC
spermatocytes
SG
spermatogonia
SZ
spermatozoa

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