MMP‐10 expression was also increased in both induced sputum and bronchoalveolar lavage fluid (BALF) as compared to control subjects and patients with other respiratory diseases.43 This Mtb‐driven MMP‐10 secretion was inhibited in a dose‐dependent manner by p38 and extracellular signal–related kinase mitogen‐activated protein kinase blockade. This evidence concerns the gene MMP10 and respiratory system disorder.