Moreover, it was reported the presence of a minor population exhibiting a strong expression of both CD36 and CD97 in remodeled areas of idiopathic pulmonary fibrosis tissue, but αSMA-negative (by immunofluorescent staining), suggesting that they were not activated fibroblasts, but more likely being considered as indicator of a quiescent, non-proliferative fibroblast background. Here, ACTA1 is linked to pulmonary fibrosis.