Abstract
Analysis of DNA epigenetic mutations in the blood circulating DNA is a prospective trend for creation of noninvasive methods for the diagnosis and treatment efficiency monitoring in cancer. The methylation status of target genes in circulating DNA was evaluated by methods based on preliminary bisulfite conversion of DNA. We used a different approach based on selection of hypermethylated sequences of circulating DNA by means of DNA-methyl-binding protein (methylated CpG island recovery assay, MIRA). Methylation was evaluated for RARβ2 tumor suppression gene in circulating DNA in lung cancer and a trend was detected to higher methylation of this gene in the patients in comparison with healthy donors.
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