ABSTRACT
Objective To evaluate the effects of exposure to MALs on immunity against Mycobacterium tuberculosis in human alveolar macrophages .Methods Plate counting were used to evaluate the effect of resisting Mycobacterium tuberculosis in human alveolar macrophages .Culture supernatants were harvested and human TNF‐α was measured by ELISA kit .Total nitrite levels in the media were measured using the Griess reagent .Results MALs stimulation attenuated the control of intracellular mycobacterial growth in human alveolar macrophages .The production of proinflammatory cytokines TNF‐α and Nitric oxide in human alveolar macrophages induced by Mycobacterium tuberculosis purified protein derivatives tuberculin (Mt‐PPD) and human interferonγwere attenuated by pretreatment in vitro with MALs .Conclusion MALs attenuated the responses of human alveolar macrophages a‐gainst Mycobacterium tuberculosis ,which may provide the new evidence to explain the phenomena in which some component of Mycobacteria in environment impacts the immunity against Mycobacterium tuberculosis infection .