Role of NF-κB/ICAM-1, JAK/STAT-3, and apoptosis signaling in the anticancer effect of tangeretin against urethane-induced lung cancer in BALB/c mice.

Lung carcinoma is one of the most prevalent and deadly neoplasia worldwide. Numerous synthetic medications have been used in the treatment of cancer. However, there are several drawbacks, such as side effects and inefficiency. The current study focused on the potential anti-cancer effectiveness of tangeretin, an antioxidant flavonoid, on lung cancer induced experimentally in BALB/c mice and explored the involvement of NF-κB/ICAM-1, JAK/STAT-3, and caspase-3 signaling in its anti-cancer effect. BALB/c mice were injected with urethane (1.5 mg/kg) twice; on the first day and on the 60 day of the experiment, then treated with 200 mg/kg tangeretin orally once daily for the last 4 weeks of the experiment. Compared with urethane group, tangeretin normalized oxidative stress markers; MDA, GSH, and SOD activity. Moreover, it had an anti-inflammatory effect by decreasing lung MPO activity, ICAM-1, IL-6, NF-қB, and TNF-α expressions. Interestingly, tangeretin decreased cancer metastasis by reducing p-JAK, JAK, p-STAT-3, and STAT-3 protein expression levels. Furthermore, it increased the apoptotic marker, caspase-3, indicating enhanced apoptosis of cancer cells. Finally, histopathology confirmed the anti-cancer effect of tangeretin. In conclusion, tangeretin could have a promising effect in counteracting lung cancer via modulation of NF-κB/ICAM-1, JAK/STAT-3, and caspase-3 signaling.