NFE2L2 and pulmonary fibrosis: The up-regulation of Nrf2 by its inducers mitigates the lung fibrosis in vivo assessed by the reduction of pulmonary fibrosing score (Sriram et al., 2009; Chitra et al., 2013; Yan et al., 2017), the decrease in the lung collagen deposition (Sriram et al., 2009; Nakamura et al., 2011; Tang et al., 2016; Xu et al., 2017) and the amount of lung hydroxyproline (Sriram et al., 2009; Chitra et al., 2013; Yan et al., 2017).