To validate the enhancement of EPB41L3 mRNA expression by fibroblasts in our previous transcriptome chip study [13], EPB41L3 mRNA and protein were measured using cultured primary fibroblasts obtained from the lung tissues of IPF patients (n = 14) and those of controls (n = 10). The gene discussed is EPB41L3; the disease is idiopathic pulmonary fibrosis.