Fig 3. Protein levels of MHC-related molecules decrease in lung macrophages exposed to Pseudomonas aeruginosa EVs for up to 48 hours.
MHC class II-related proteins CD74 and CD9 decrease after 48 hours, however show some variability at the 24 hour time point. HLA-DR subunits were modestly diminished at 48 hours post P.a. EV-treatment. TLR engagement has been reported to partly stabilize HLA-DR surface molecules, potentially leading to a modest depletion at the protein level. A complement of four additional subjects were used for cellular protein studies (see methods section). Responses were similar in 3 of 4 subjects.