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Direct effects of Helicobacter pylori (H. pylori) on human CD4 + T-cells hamper disentangling a possible bacterial-mediated interference with major histocompatibility complex class II (MHC-II)-dependent antigen presentation to these cells. To overcome this limitation, we employed a previously described assay, which enables assessing human antigen-processing cell function by using murine T-cell hybridoma cells restricted by human leukocyte antigen (HLA) alleles. HLA-DR1 + monocyte-derived dendritic cells were exposed to H. pylori and pulsed with the antigen 85B from Mycobacterium tuberculosis (M. tuberculosis) . Interleukin-2 (IL-2) secretion by AG85B aa97-112 -specific hybridoma cells was then evaluated as an integral reporter of cognate antigen presentation. This methodology enabled revealing of interference of H. pylori with the antigen-presenting capacity of human dendritic cells.

european journal of microbiology and immunology

Usage of murine T-cell hybridoma cells as responder cells reveals interference of <i>Helicobacter pylori</i> with human dendritic cell-mediated antigen presentation

Usage of murine T-cell hybridoma cells as responder cells reveals interference of Helicobacter pylori with human dendritic cell-mediated antigen presentation