To determine whether pro-apoptotic gene expression is dysregulated in mesenchymal cells during TGFα-induced pulmonary fibrosis, we used RT-PCR to quantify pro-apoptotic gene expression in lung-resident myofibroblasts and fibrocytes isolated from lungs of normal and TGFα mice on Dox for 4 weeks. The gene discussed is TGFA; the disease is pulmonary fibrosis.