Differential DNA Methylation of the IMMP2L Gene in Families with Maternally Inherited 7q31.1 Microdeletions is Associated with Intellectual Disability and Developmental Delay.

Autor:	Vasilyev SA; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Skryabin NA; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Kashevarova AA; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Tolmacheva EN; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Savchenko RR; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Vasilyeva OY; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Lopatkina ME; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Zarubin AA; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Fishman VS; Institute of Cytology and Genetics, SB RAS, Novosibirsk, Russian Federation., Belyaeva EO; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Filippova MO; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Shorina AR; Novosibirsk City Clinical Hospital, Novosibirsk, Russian Federation., Maslennikov AB; Novosibirsk City Clinical Hospital, Novosibirsk, Russian Federation., Shestovskikh OL; City Perinatal Clinical Center, Omsk, Russian Federation., Gayner TA; Group of Companies 'Center of New Medical Technologies,', Novosibirsk, Russian Federation.; Institute of Chemical Biology and Fundamental Medicine, SB RAS, Novosibirsk, Russian Federation., Čulić V; Gynecology and Obstetrics Private Outpatient Clinic, Split, Croatia., Vulić R; Gynecology and Obstetrics Private Outpatient Clinic, Split, Croatia., Nazarenko LP; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation., Lebedev IN; Research Institute of Medical Genetics, Tomsk National Research Medical Center, Tomsk, Russian Federation.
Jazyk:	angličtina
Zdroj:	Cytogenetic and genome research [Cytogenet Genome Res] 2021; Vol. 161 (3-4), pp. 105-119. Date of Electronic Publication: 2021 Apr 13.
DOI:	10.1159/000514491
Abstrakt:	Most copy number variations (CNVs) in the human genome display incomplete penetrance with unknown underlying mechanisms. One such mechanism may be epigenetic modification, particularly DNA methylation. The IMMP2L gene is located in a critical region for autism susceptibility on chromosome 7q (AUTS1). The level of DNA methylation was assessed by bisulfite sequencing of 87 CpG sites in the IMMP2L gene in 3 families with maternally inherited 7q31.1 microdeletions affecting the IMMP2L gene alone. Bisulfite sequencing revealed comparable levels of DNA methylation in the probands, healthy siblings without microdeletions, and their fathers. In contrast, a reduced DNA methylation index and increased IMMP2L expression were observed in lymphocytes from the healthy mothers compared with the probands. A number of genes were upregulated in the healthy mothers compared to controls and downregulated in probands compared to mothers. These genes were enriched in components of the ribosome and electron transport chain, as well as oxidative phosphorylation and various degenerative conditions. Differential expression in probands and mothers with IMMP2L deletions relative to controls may be due to compensatory processes in healthy mothers with IMMP2L deletions and disturbances of these processes in probands with intellectual disability. The results suggest a possible partial compensation for IMMP2L gene haploinsufficiency in healthy mothers with the 7q31.1 microdeletion by reducing the DNA methylation level. Differential DNA methylation of intragenic CpG sites may affect the phenotypic manifestation of CNVs and explain the incomplete penetrance of chromosomal microdeletions. (© 2021 S. Karger AG, Basel.)
Databáze:	MEDLINE
Externí odkaz:	Zobrazit plný text záznamu