Systematic Reviews
Copyright ©The Author(s) 2022.
World J Med Genet. Oct 27, 2022; 10(2): 7-21
Published online Oct 27, 2022. doi: 10.5496/wjmg.v10.i2.7
Table 1 Mechanistic links between epigenetic disruptions and infertility
Epigenetic mechanisms
Links (Pathophysiology)
Ref.
DNA methylationHypermethylation or hypomethylation disrupts genomic imprinting and parental epigenetic mark erasure, resulting in abnormal expression of some genes and imprinted genes involved in gametogenesis and embryogenesis[3,4,12,13,17,20,25,29-42,44-49]
Histone post-translational modificationAbnormal histone modification alters the expression of certain genes important in gametogenesis and embryogenesis. Also, it disrupts sperm DNA protamination, causing sperm abnormalities [7,43,56-63]
miRNAUp-regulation or down-regulation alters the expression of certain genes important in gametogenesis and embryogenesis[15,68-75]