Gene expression and protein secretion of inflammatory factors in BV2-N, BV2-MC and BV2-MR after 50 ng/ml LPS stimulation. a Gene expression of IL-1β, IL-6, TNF-α, Cox2 and iNOS was much lower in LPS-treated BV2-MC than BV2-N and BV2-MR. b the production of IL-6 and TNF-α in the supernatant of LPS-treated BV2-MC was much less than BV2-N and BV2-MR. (BV2-N: normal BV2 cell, BV2-MC: mycoplasma-contaminated BV2 cell, BV2-MR: mycoplasma-removed BV2-MC cell). (*P < 0.05)