BCL2 and idiopathic pulmonary fibrosis: Interestingly, both IPF (SN) and CLF (SN) induced in T cells a positive regulation of the anti-apoptotic molecule Bcl-2 at 3 and 24 h (Figure 4C), though at 3 h of culture, T cells/IPF (SN) displayed a lower expression of Bcl-2 than T cells/CLF (SN).