title: Expression of costimulatory molecules on peripheral blood mononuclear cells in multiple sclerosis.
abstract: OBJECTIVE
  To determine whether there was aberrant expression of costimulatory molecules and their receptors on peripheral blood mononuclear cells of MS patients and healthy individuals and whether expression correlated with disease status.
  
  
  METHODS
  Forty-six patients with MS and 29 healthy individuals were analyzed by direct 2-color immunofluorescence flow cytometry for expression of CD80, CD86, CD28 and CTLA-4 on T and B cells and monocytes.
  
  
  RESULTS
  Expression of CD80 on CD4+ T cells was upregulated in progressing MS patients compared to stable MS patients and controls. Marked increase in the expression of CD80 and CD86 was seen on both CD4+ and CD8+ T cells from an MS patient with rapidly progressing disease. No difference in the expression of the costimulatory molecules or their ligands was seen between IFN-beta treated and non-treated MS patients.
  
  
  CONCLUSIONS
  Aberrant expression of costimulatory molecules occurs on T lymphocytes in MS patients with progressing disease.
authors.affiliation: University of Medicine & Dentistry of New Jersey, New Jersey Medical School, Department of Neurosciences, Newark 07103, USA.
authors.forename: E
authors.initials: E
authors.lastname: Mena
authors.forename: C
authors.initials: C
authors.lastname: Rohowsky-Kochan
mesh_terms: D000069594:Abatacept; D000328:Adult; D015703:Antigens, CD / Q000097:blood; D000943:Antigens, Differentiation / Q000097:blood; D001402:B-Lymphocytes / Q000276:immunology*; D018122:B7-1 Antigen / Q000097:blood; D051940:B7-2 Antigen; D018106:CD28 Antigens / Q000097:blood; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology; D060908:CTLA-4 Antigen; D005260:Female; D006801:Humans; D018796:Immunoconjugates; D008213:Lymphocyte Activation / Q000276:immunology*; D008297:Male; D008562:Membrane Glycoproteins / Q000097:blood; D008875:Middle Aged; D009000:Monocytes / Q000276:immunology*; D009103:Multiple Sclerosis / Q000175:diagnosis / Q000276:immunology*; D013601:T-Lymphocytes / Q000276:immunology*; D015854:Up-Regulation / Q000502:physiology
chemical_list: D015703:Antigens, CD; D000943:Antigens, Differentiation; D018122:B7-1 Antigen; D051940:B7-2 Antigen; D018106:CD28 Antigens; C497964:CD86 protein, human; D060908:CTLA-4 Antigen; C556706:CTLA4 protein, human; D018796:Immunoconjugates; D008562:Membrane Glycoproteins; D000069594:Abatacept