Fig. 6

Hypoxia aggravates inflammatory response in MPO-deficient mice during Salmonella infection. Under the condition of Salmonella infection with normal MPO function, MPO played a bactericidal role. Under hypoxic exposure and MPO-deficient conditions, massive H2O2 releases and massive recruitment of neutrophils and macrophages lead to a dramatic increase in ROS, causing decreased oxidative capacity and overexpression of inflammatory genes