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Associations between polymorphic variants of genes responsible for bone mineral density and phenotypes of inflammatory bowel diseases

[Pediatrics]
Maria Erohina; Elena Ivanovna Kondratieva; Elena Loshkova; Ekaterina Yablokova;

The aim of the study was to establish associative links between single nucleotide polymorphic variants of genes VDR, CALCR and COL1A1 and clinical phenotypes of inflammatory bowel diseases and their effect on the state of bone metabolism in children. It has been shown that gene polymorphisms of the VDR (TaqI) CC and (BsmI) AA genes are associated with an increased risk of Crohn’s disease, (TaqI) TT and (BsmI) GG are associated with minimal disease activity, (ApaI) GT is associated with the development of perianal lesions (OR=4.4). Patients with genotypes GG (BsmI) and TT (FokI) of the VDR gene had the lowest calcidiol values; carriers of genotypes GG COL1A1 and TT CALCR were more likely to have a body weight deficiency on the background of ulcerative colitis. It has been established that polymorphisms of the VDR, COL1A1, and CALCR genes are not markers of a general predisposition to inflammatory bowel diseases, but they influence individual phenotypic manifestations: disease activity, nutritional status disorders, perianal lesions, and vitamin D metabolism.

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Keywords: polymorphism of VDR, CALCR, COL1A1 genes, phenotype, inflammatory bowel diseases, Crohn’s disease, ulcerative colitis, children, bone mineral density, bone metabolism


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