For the SDF-1a and CXCR4 genes, the transcript levels were higher in the mock infected cultures from IPF patients, with ratios of the means 1.56 (p = 0.758) and 2.29 (p = 0.372), respectively compared to the mock infected from healthy donors. This evidence concerns the gene CXCR4 and idiopathic pulmonary fibrosis.