The Association of Cigarette Smoke Exposure with Lung Cellular Toxicity and Oxidative Stress: the Protective Role of Crocin.

Cigarette smoke (CS) contains many free radicals and toxic chemicals. Nuclear erythroid-related factor-2 (Nrf2) is a transcriptional regulator of several phase II antioxidant genes, including glutamate-cysteine ligase (GCL). In this study, it was hypothesized that Crocin may mediate antioxidant signaling pathway to protect human lung epithelial cells against CS-mediated toxicity and oxidative stress via inducing glutathione (GSH) biosynthesis and activation of Nrf2 pathway.

Crocin attenuates cigarette smoke-induced lung injury and cardiac dysfunction by anti-oxidative effects: the role of Nrf2 antioxidant system in preventing oxidative stress.

Background: Chronic obstructive pulmonary disease (COPD) has been emerging as a great health problem in world. Cigarette smoke is known to cause oxidative stress and deplete glutathione (GSH) levels. Nuclear erythroid-related factor 2 (Nrf2) is involved in transcriptional regulation of glutamate-cysteine ligase catalytic subunit (GCLc).