Serum progranulin levels are elevated in dermatomyositis patients with acute interstitial lung disease, predicting prognosis

Progranulin (PGRN), a pleiotropic growth factor, has emerged as an immunoregulatory molecule. Because the roles of PGRN in dermatomyositis (DM) are still unknown, we investigated whether serum PGRN levels are associated with disease activity and prognosis in DM patients, particularly in those with DM complicated with interstitial lung disease (ILD). The serum levels of PGRN were measured by enzyme-linked immunosorbent assay in patients with DM (n=57; acute/subacute interstitial pneumonia (A/SIP): n=17, chronic interstitial pneumonia (CIP): n=24, without ILD: n=16), polymyositis (PM, n=21; incl... Mehr ...