MMP9 and asthma: While MMP‐2 and MMP‐9 are implicated in asthma (Kelly and Jarjour 2003; Takahashi et al. 2019), MMP‐9, MMP‐1, MMP‐13, MMP‐2, and MMP‐8 have been shown to be extensively involved in the progression of UC (Derkacz et al. 2021; Garg et al. 2009).