Table 1.
Molecular and gross phenotypic changes associated with early life EDC exposure
EDC | Exposure | Changes in epigenetic and/or ligand-activated transcription factor regulation; transgenerational effects (when applicable) | Ref. |
---|---|---|---|
DES | Perinatal | Increased Ezh2 expression (mRNA and protein) and increased H3K37me3 in F1 mouse mammary gland | [56] |
In utero | Hypermethylation of Hoxa10 gene, increased expression of Dnmt1 and Dnmt3b genes in F1 mouse uterus | [96] | |
Postnatal | Increased phospho-EZH2 via ER-activated PI3K/Akt pathway, reduced H3K27me3 in F1 rat uterus; ERα knockout mouse failed activate PI3K/Akt signaling cascade | [110] | |
Vinclozolin | In utero | Increased spermatogenic cell apoptosis, reduced epididymal sperm counts and sperm mobility in F1–F4 rats, altered DNA methylation in F2 and F3 epididymal sperm | [99] |
In utero | Altered DNA methylation at imprinted genes in F1–F3 mouse sperm | [100] | |
In utero | Reduced AR expression, increased NF-κB activation, increased Dnmt3a and Dnmt3b expression in F1 rat prostate; reduced Dnmt1 and Dnmt3l but increased Dnmt3b in F1 rat testis | [111] | |
In utero | Altered methylation at 24 DMRs in primordial germ cells and 14 DMRs in prospermatogonia of F3 rat embryos; no assessment of Dnmt levels | [112] | |
Methoxychlor | In utero | Altered methylation at imprinted genes in F1 and F2 mouse sperm; not significant in F3 | [113] |
In utero | 37 DMRs in F3 rat sperm; DMR associated genes involved in PI3K signaling system and steroid hormone biosynthesis | [102] | |
Perinatal | Hypermethylation in Esr2 promoter, reduced Esr2 expression, increased Dnmt3b expression in F1 rat ovaries | [114] | |
DDT | Postnatal | Decreased AR expression in testis and upregulation of PXR in F0 male mouse liver | [115] |
TCDD | In utero | Altered methylation and expression at imprinted genes in muscle and liver; increased expression of lncRNA Airn in F1 mouse sperm | [116] |
Perinatal | AR expression reduced in F1 rat ventral prostate | [117] | |
In utero | 50 DMRs in promoter regions of F3 rat sperm, including Jmjd8 and Hdac3 genes | [118] | |
Tributyltin | In utero | Increase in obesity-related parameters (i.e. increased white adipose tissue, hepatic lipid accumulation) in F1–F3 mice | [119] |
Perinatal refers to exposure in utero and after birth