Alterations in the secretome of senescent cells with a chronic increment of production of several inflammatory secretory proteins, including plasminogen activator inhibitor-1 (PAI-1), matrix remodelling proteins (MMPs), growth factors such as TGFβ1, as well as other initial inflammatory stimuli, including IL-6, IL-8 and IL-1α, are present in IPF lungs. This evidence concerns the gene TGFB1 and idiopathic pulmonary fibrosis.