Genomic imprinting belongs by its nature to problems of epigenetics, which studies hereditary changes in gene expression not related to defective sequences of DNA nucleotides. Epigenetic mechanisms of control, including genomic imprinting, are involved in many processes of normal and pathological development of humans and animals. Disturbances of genomic imprinting may lead to various consequences, such as formation of developmental anomalies and syndromes in humans, appearance of the large offspring syndrome and increased mortality upon cloning of mammals, and death of parthenogenetic embryos soon after implantation and beginning of organogenesis. The death of diploid parthenogenetic or androgenetic mammalian embryos is determined by the absence of expression of the genes of imprinted loci of the maternal or paternal genome, which leads to significant defects in development of tissues and organs. A review is provided of the studies aimed at search of possible normalization of misbalanced gene activity and modulation of genomic imprinting effects during parthenogenetic development in mammals.
Russian Journal of Developmental Biology – Springer Journals
Published: Aug 15, 2005
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