PMID: 19137728Jan 14, 2009Paper

Epigenetic inactivation of the RB1 gene as a factor of genomic instability: a possible contribution to etiology of chromosomal mosaicism during human embryo development

Genetika
E N TolmachevaI N Lebedev

Abstract

The methylation status of the cell cycle control gene RB1 has been studied in placental tissues of spontaneous abortions of the first trimester of pregnancy with mosaic variants of numerical chromosomal abnormalities verified by a molecular genetic examination. Aberrant methylation of the gene promoter region has been revealed for the first time in 20% of embryos with chromosomal mosaicism that died in utero. A maximum frequency of epimutations was recorded in a group of embryos with a low level of abnormal cells for which mitotic errors are most likely to determine the formation of mosaic aneuploidy in primary euploid zygotes. It has been suggested that aberrant epigenetic genomic modifications at early stages of human embryonic development can be one of the mechanisms promoting genomic instability realized in the form of mosaic abnormalities of the karyotype that are incompatible with the normal course of embryogenesis.

References

Mar 1, 1992·Human Genetics·D K KalousekA B Gärtner
Sep 1, 1994·Biology of Reproduction·S MunnéJ Cohen
May 23, 2001·Journal of Medical Genetics·J F Costello, C Plass
Apr 1, 2004·European Journal of Human Genetics : EJHG·Igor N LebedevSergey A Nazarenko
Jul 3, 2004·Genes & Development·Kenneth D PossMark T Keating
Jul 5, 2005·Human Reproduction Update·Bernhard Horsthemke, Michael Ludwig
Dec 27, 2006·Cancer Cell·Rocío SotilloRobert Benezra

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Citations

Jul 28, 2011·Molekuliarnaia biologiia·E N TolmachevaI N Lebedev
Nov 3, 2010·The Journal of Obstetrics and Gynaecology Research·Fulvia Gloria-BottiniEgidio Bottini

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