Comparative study of cytotoxic Signaling pathways in H1299 cells exposed to alternative Bisphenols: BPA, BPF, and BPS

Background: Bisphenols are prevalent in food, plastics, consumer goods, and industrial products. Bisphenol A (BPA) and its substitutes, bisphenol F (BPF) and bisphenol S (BPS), are known to act as estrogen mimics, leading to reproductive disorders, disruptions in fat metabolism, and abnormalities in brain development.

Objectives: Despite numerous studies exploring the adverse effects of bisphenols both in vitro and in vivo, the molecular mechanisms by which these compounds affect lung cells remain poorly understood. This study aims to compare the effects of BPA, BPF, and BPS on the physiological behavior of human nonsmall cell lung cancer (NSCLC) cells.

Materials and methods: Human non-small cell lung cancer (NSCLC) H1299 cells were treated with various concentration of BPA, BPF and BPS during different exposure time. Cellular physiology for viability and cell cycle was assessed by the staining with apoptotic cell makers such as active Caspase-3 and cyclins antibodies. Toxicological effect was quantitatively counted by using flow-cytometry analysis.

Results: Our findings indicate that BPA induces apoptosis by increasing active Caspase-3 levels in H1299 cells, whereas BPF and BPS do not promote late apoptosis. Additionally, BPA was found to upregulate cyclin B1, causing cell cycle arrest at the G0/G1 phase and leading to apoptotic cell death through Caspase-3 activation. Conclusion: These results demonstrate that BPA, BPF, and BPS differentially impact cell viability, cell cycle progression, and cell death in human NSCLC cells.