LAMP1 and bacterial arthritis: However, LAMP1, PLAC8A, and PLAC8B tended to be higher in the septic arthritis group at PID1 compared to experimentally induced the non-septic synovitis group, while PLA2G7 tended to be lower in septic arthritis compared to non-septic synovitis (Figure 5), which is consistent with the pattern of the mRNA expression measured by the SeptiCyte Lab.