In an experimental model of asthma, Florencio et al. [22] showed attenuation in MMP-9, TGF-β and collagen fibers after treatment with rBmTI-A, and Bortolozzo et al. [21] using treatment with CrataBL reduced MMP-9, MMP-12 and collagen fibers. The gene discussed is MMP12; the disease is asthma.