We first investigated the mRNA levels of several peroxisomal genes involved in the organelle biogenesis (PEX13, PEX14), plasmalogen synthesis (AGPS, GNPAT), and fatty acid β-oxidation (ACOX1, ACAA1) in control and IPF fibroblasts. The gene discussed is ACAA1; the disease is idiopathic pulmonary fibrosis.