title: Unique gene expression patterns in human T-cell lines generated from multiple sclerosis patients by stimulation with a synthetic MOG peptide.
abstract: Multiple sclerosis (MS) is an autoimmune disease where T-cells activated against myelin antigens are involved in myelin destruction. Yet, healthy subjects also harbor T-cells responsive to myelin antigens, suggesting that MS patient-derived autoimmune T-cells might bear functional differences from T-cells derived from healthy individuals. We addressed this issue by analyzing gene expression patterns of myelin oligodendrocytic glycoprotein (MOG) responsive T-cell lines generated from MS patients and healthy subjects. We identified 150 transcripts that were differentially expressed between MS patients and healthy controls. The most informative 43 genes exhibited > 1.5-fold change in expression level. Eighteen genes were upregulated including BCL2, lifeguard, IGFBP3 and VEGF. Twenty five genes were down-regulated, including apoptotic activators like TNF and heat shock protein genes. This gene expression pattern was unique to MOG specific T-cell lines and was not expressed in T-cell lines reactive to tetanus toxin (TTX). Our results indicate that activation in MS that promotes T-cell survival and expansion, has its own state and that the unique gene expression pattern that characterize autoreactive T-cells in MS represent a constellation of factors in which the chronicity, timing and accumulation of damage make the difference between health and disease.
authors.affiliation: Blood Center, Sheba Medical Center, Tel Hashomer 52621, Israel. mandel@sheba.health.gov.il
authors.forename: Mathilda
authors.initials: M
authors.lastname: Mandel
authors.forename: Michael
authors.initials: M
authors.lastname: Gurevich
authors.forename: Gad
authors.initials: G
authors.lastname: Lavie
authors.forename: Irun R
authors.initials: IR
authors.lastname: Cohen
authors.forename: Anat
authors.initials: A
authors.lastname: Achiron
mesh_terms: D001483:Base Sequence; D002460:Cell Line; D004247:DNA / Q000235:genetics; D015870:Gene Expression; D020869:Gene Expression Profiling; D006801:Humans; D009103:Multiple Sclerosis / Q000235:genetics* / Q000276:immunology*; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein / Q000276:immunology*; D063308:Myelin-Oligodendrocyte Glycoprotein; D020411:Oligonucleotide Array Sequence Analysis; D010446:Peptide Fragments / Q000276:immunology; D013601:T-Lymphocytes / Q000276:immunology* / Q000378:metabolism
chemical_list: C571326:MOG protein, human; D009185:Myelin Proteins; D018992:Myelin-Associated Glycoprotein; D063308:Myelin-Oligodendrocyte Glycoprotein; D010446:Peptide Fragments; D004247:DNA