In this context, we anticipate mitigation of DMD disease induced-iNOS, and cytokine levels of TNF-α, IL1β, Nox4, NPT, M1 macrophages, MMP9, and the increase in CD4+, and CD8+ cells, diaphragm atrophy, and alveolar leakage in the DMD disease mice treated with iNOS inhibitor. The gene discussed is CD4; the disease is Duchenne muscular dystrophy.