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A surface plasmon resonance- (SPR-) based recognition method applying H-2 L d :Ig/peptides complexes for ex vivo monitoring cellular immune responses during murine infection with  Leishmania (Leishmania) amazonensis  is described. Lymphocytes from lesion-draining popliteal lymph nodes were captured on a carboxylated sensor chip surface previously functionalized with H-2 L d :Ig (DimerX) protein bound to synthetic peptides derived from the COOH-terminal region of cysteine proteinase B of  L. (L.) amazonensis.  In computational analysis, these peptides presented values of kinetic constants favorable to form complexes with H-2 L d  at neutral pH, with a Gibbs free energy Δ G ° < 0. The assayed DimerX:peptide complexes presented the property of attaching to distinct T lymphocytes subsets, obtained from experimentally infected BALB/c mice, in each week of infection, thus indicating a temporal variation in specific T lymphocytes populations, each directed to a different COOH-terminal region-derived peptide. The experimental design proposed herein is an innovative approach for cellular immunology studies of a neglected disease, providing a useful tool for the analysis of specific T lymphocytes subsets.

biomed research international

Exploring the Association of Surface Plasmon Resonance with Recombinant MHC:Ig Hybrid Protein as a Tool for Detecting T Lymphocytes in Mice Infected with<i>Leishmania (Leishmania) amazonensis</i>

Exploring the Association of Surface Plasmon Resonance with Recombinant MHC:Ig Hybrid Protein as a Tool for Detecting T Lymphocytes in Mice Infected withLeishmania (Leishmania) amazonensis