MMP9 and kidney disorder: A majority of studies in patients with kidney diseases as well as animal models hereof demonstrate that the renal content of MMP‐2 and MMP‐9 are increased (Gharagozlian et al. 2009; Krag et al. 2007; Lu et al. 2011; Tan and Liu 2012; Thrailkill et al. 2009; Wang et al. 2010; Williams et al. 2011).