hr A hypothesis: Retrotransposons as a relay of epigenetic marks in intergenerational epigenetic inheritance

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作   者：

Zeng, Ling;  Wang, Mei;  Zhou, Jinzhao;  Wang, Xiaofei;  Zhang, Yanwei;  Su, Ping; 

作者机构：

Zhongnan Hosp;  Huazhong Univ Sci & Technol;  Tongji Med Coll;  Wuhan Univ; 

关键词：

Retrotransposons;  TRANSCRIPTION FACTOR-BINDING;  Epigenetic marks;  SMALL RNAS;  IN-UTERO UNDERNUTRITION;  HIGH-FAT DIET;  REVERSE-TRANSCRIPTASE;  TRANSPOSABLE ELEMENTS;  METHYL SUPPLEMENTS;  Intergenerational epigenetic inheritance;  DNA DEMETHYLATION DYNAMICS;  ENDOGENOUS RETROVIRUSES;  Embryogenesis;  TRANSGENERATIONAL INHERITANCE; 

期刊名称：

Gene: An International Journal Focusing on Gene Cloning and Gene Structure and Function

i s s n：

0378-1119

年卷期：

2022 年 817 卷

页   码：

146229-146229

页   码：

摘   要：

Epigenetic marks in gametes, which both respond to the parental environmental factors and shape offspring phenotypes, are usually positioned to mediate intergenerational or transgenerational epigenetic inheritance. Nonetheless, the mechanisms through which gametic epigenetic signatures encode parental acquired phenotypes, and further initiate a cascade of molecular events to affect offspring phenotypes during early embryonic development, remain unclear. Retrotransposons are mobile DNA elements that could resist to genomic epigenetic reprogramming at specific loci and rewire the core regulatory networks of embryogenesis. Increasing evidences show that retrotransposons in the embryonic genome could interact with gametic epigenetic marks, which provides a tentative possibility that retrotransposons may serve as a relay of gametic epigenetic marks to transmit parental acquired traits. Here, we summarize the recent progress in exploring the crosstalk between gametic epigenetic marks and retrotransposons, and the regulation of gene expression and early embryonic development by retrotransposons. Accordingly, deciphering the mystery of interactions between gametic epigenetic marks and retrotransposons during early embryonic development will provide valuable insights into the intergenerational or transgenerational transmission of acquired traits.