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National Institute of Environmental Health Sciences

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Publication Detail

Title: Oxidative stress and dietary micronutrient deficiencies contribute to overexpression of epigenetically regulated genes by lupus T cells.

Authors: Ray, Donna; Strickland, Faith M; Richardson, Bruce C

Published In Clin Immunol, (2018 11)

Abstract: Patients with active lupus have altered T cells characterized by low DNA methyltransferase levels. We hypothesized that low DNA methyltransferase levels synergize with low methionine levels to cause greater overexpression of genes normally suppressed by DNA methylation. CD4+ T cells from lupus patients and controls were stimulated with PHA then cultured in custom media with normal or low methionine levels. Oxidative stress was induced by treating the normal CD4+ T cells with peroxynitrite prior to culture. Methylation sensitive gene expression was measured by flow cytometry. Results showed low methionine levels caused greater overexpression of methylation sensitive genes in peroxynitrite treated T cells relative to untreated T cells, and in T cells from lupus patients relative to T cells from healthy controls. In conclusion, low dietary transmethylation micronutrient levels and low DNA methyltransferase levels caused either by oxidative stress or lupus, have additive effects on methylation sensitive T cell gene expression.

PubMed ID: 29654844 Exiting the NIEHS site

MeSH Terms: Adult; Aged; CD4-Positive T-Lymphocytes/drug effects; CD4-Positive T-Lymphocytes/immunology*; CD4-Positive T-Lymphocytes/metabolism; Case-Control Studies; Choline/metabolism; DNA Methylation; DNA Modification Methylases/metabolism; Diet*; Epigenesis, Genetic; Female; Flow Cytometry; Folic Acid/metabolism; Gene Expression Regulation/drug effects; Gene Expression Regulation/immunology; Homocysteine/metabolism; Humans; Lupus Erythematosus, Systemic/genetics*; Lupus Erythematosus, Systemic/immunology; Lupus Erythematosus, Systemic/metabolism; Male; Methionine/deficiency*; Methionine/immunology; Micronutrients/deficiency*; Micronutrients/immunology; Middle Aged; Oxidative Stress/drug effects; Oxidative Stress/genetics*; Oxidative Stress/immunology; Peroxynitrous Acid/pharmacology; Riboflavin/metabolism; T-Lymphocytes/immunology; Vitamin B 12/metabolism; Vitamin B 6/metabolism; Young Adult; Zinc/metabolism

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