Gender-Biased Regulation of Human IL-17-Producing Cells in Vitro by Peptides Corresponding to Distinct HLA-DRB1 Allele-Coded SequencesReportar como inadecuado




Gender-Biased Regulation of Human IL-17-Producing Cells in Vitro by Peptides Corresponding to Distinct HLA-DRB1 Allele-Coded Sequences - Descarga este documento en PDF. Documentación en PDF para descargar gratis. Disponible también para leer online.

Rheumatoid arthritis RA is associated with an HLA-DRB1-coded sequence motif called -shared epitope- SE. To explore potential mechanisms of RA susceptibility, we analyze in vitro effect of peptides bearing different HLA-DR4 sequences on human peripheral blood-derived cells. Three 15-mer peptides were used: 65-79*0401 HLA-DRB1*04:01- coded sequence SE motif, QKRAA; 65-79*0402 HLA-DRB1*04:02-coded sequence SE-negative motif, DERAA; 65-79*0403 HLA-DRB1*04:03-coded sequence SE-negative motif, QRRAE. We found that CD4 TH17 cells are regulated by peptide treatment with gender bias. In male-derived T cells, all peptide treatments significantly reduced TH17 cell differentiation in vitro when compared to no peptide treatment, and to female samples. TH17 differentiation in samples not treated with peptides, either in the presence or absence of TH17-polarizing cytokines, was higher in males than in females; however, in unfractionated PBMC after treatment with TH17 polarizing cytokines, IL-17A-positive cells were more abundant in females than in males. In addition, SE-positive females showed a significantly higher percentage of IL-17A-positive cells compared to SE-negative females. In conclusion, donor’s SE status and gender may both influence TH17 immune polarization.

KEYWORDS

MHC Class II; PBMC; TH17; Cytokines; Immune Polarization; Review

Cite this paper

L. Blanco, M. Plegue, W. Fung-Leung and J. Holoshitz -Gender-Biased Regulation of Human IL-17-Producing Cells in Vitro by Peptides Corresponding to Distinct HLA-DRB1 Allele-Coded Sequences,- Journal of Immune Based Therapies, Vaccines and Antimicrobials, Vol. 2 No. 3, 2013, pp. 29-38. doi: 10.4236-jibtva.2013.23004.





Autor: Luz P. Blanco, Melissa Plegue, Wai-Ping Fung-Leung, Joseph Holoshitz

Fuente: http://www.scirp.org/



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