Neuropathologic, phenotypic and functional analyses of Mucosal Associated Invariant T cells in Multiple Sclerosis.
Clin Immunol
; 166-167: 1-11, 2016 05.
Article
em En
| MEDLINE
| ID: mdl-27050759
ABSTRACT
BACKGROUND:
The involvement of Mucosal Associated Invariant T (MAIT) cells, which are anti-microbial semi-invariant T cells, remains elusive in Multiple Sclerosis (MS).OBJECTIVE:
Deciphering the potential involvement of MAIT cells in the MS inflammatory process.METHODS:
By flow cytometry, blood MAIT cells from similar cohorts of MS patients and healthy volunteers (HV) were compared for frequency, phenotype, activation potential after in vitro TCR engagement by bacterial ligands and transmigration abilities through an in vitro model of blood-brain barrier. MS CNS samples were also studied by immunofluorescent staining and quantitative PCR. RESULTS ANDCONCLUSION:
Blood MAIT cells from relapsing-remitting MS patients and HV presented similar frequency, ex vivo effector phenotype and activation abilities. MAIT cells represented 0.5% of the total infiltrating T cells on 39 MS CNS lesions. This is low as compared to blood frequency (p<0.001), but consistent with their low transmigration rate. Finally, transcriptional over-expression of MR1 - which presents cognate antigens to MAIT cells - and of the activating cytokines IL-18 and IL-23 was evidenced in MS lesions, suggesting that the CNS microenvironment is suited to activate the few infiltrating MAIT cells. Taken together, these data place MAIT cells from MS patients as minor components of the inflammatory pathological process.Palavras-chave
Texto completo:
1
Bases de dados:
MEDLINE
Assunto principal:
Encéfalo
/
Esclerose Múltipla Crônica Progressiva
/
Esclerose Múltipla Recidivante-Remitente
/
Células T Invariantes Associadas à Mucosa
Tipo de estudo:
Observational_studies
/
Prognostic_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Clin Immunol
Assunto da revista:
ALERGIA E IMUNOLOGIA
Ano de publicação:
2016
Tipo de documento:
Article
País de afiliação:
França