title: [CD40L expression on T CD4+ lymphocytes from peripheral blood in patients with relapsing-remitting and secondary progressive multiple sclerosis].
abstract: Multiple sclerosis (MS) is believed to be a T cell-mediated autoimmune disease. One of the particularly important signals is mediated by CD40L, a costimulatory molecule which appears on activated T cell. The aim of this study was examination of the CD40L expression on freshly obtained lymphocytes T CD4+ which were ex vivo stimulated with monoclonal antibody anti CD3+rIL-2 in patients with relapsing-remitting and secondary progressive multiple sclerosis.
  
  
  METHODS
  12 relapsing-remitting (RR) and 16 secondary progressive (SP) MS patients with long-lasting clinical remission and 24 healthy subjects were included in the study. The proportion of unstimulated and ex vivo stimulated with anti CD3+rIL-2 TCD4+ cells from peripheral blood co-expressing CD40L was studied by dual immunofluorescence method.
  
  
  RESULTS
  The proportion of unstimulated and stimulated T CD4+CD40L+ cells did not differ significantly between RRMS and controls. The percentage of unstimulated TCD4+CD40L+ cells from SP patients exhibited significantly higher proportion - when compared with controls. These cells did not respond to ex vivo stimulation and their level was similar to that of stimulated cells from controls.
  
  
  CONCLUSIONS
  Dysregulation of costimulation in SPMS expressing as enhanced percentage of TCD4+CD40L+ cells may be responsible for maintenance of chronic activation state of lymphocytes leading to prolonged inflammatory process.
authors.affiliation: Akademia Medyczna we Wrocławiu, Katedra i Klinika Neurologii. mbilinsk@dilnet.wroc.pl
authors.forename: Małgorzata
authors.initials: M
authors.lastname: Bilińska
authors.forename: Irena
authors.initials: I
authors.lastname: Frydecka
authors.forename: Agata
authors.initials: A
authors.lastname: Kosmaczewska
authors.forename: Lidia
authors.initials: L
authors.lastname: Ciszak
authors.forename: Magdalena
authors.initials: M
authors.lastname: Koszewicz
authors.forename: Anna
authors.initials: A
authors.lastname: Pokryszko-Dragan
mesh_terms: D000328:Adult; D015704:CD4 Antigens / Q000097:blood* / Q000276:immunology; D023201:CD40 Ligand / Q000097:blood* / Q000276:immunology; D018450:Disease Progression; D005260:Female; D005434:Flow Cytometry; D006801:Humans; D008297:Male; D008875:Middle Aged; D020528:Multiple Sclerosis, Chronic Progressive / Q000097:blood* / Q000276:immunology; D020529:Multiple Sclerosis, Relapsing-Remitting / Q000097:blood* / Q000276:immunology
chemical_list: D015704:CD4 Antigens; D023201:CD40 Ligand