Protective effect of propofol on hydrogen peroxide-induced human esophageal carcinoma via blocking the Wnt/β-catenin signaling pathway

Objective(s):

To analyze the potential influences of propofol on the oxidative stress of H₂O₂-induced human esophageal squamous cell carcinoma (ESCC) Eca109 cell through mediating the Wnt/β-catenin signaling pathway.

Materials and Methods:

Eca109 cells were classified into 5 groups: Control group, H₂O₂ group, Propofol + H₂O₂ group, Dkk1 (Dickkopf-1, Wnt/β-catenin pathway antagonist) + H₂O₂ group, and Propofol + LiCl (Lithium chloride, Wnt/β-catenin pathway agonist) + H₂O₂ group. Western blotting was performed to determine the protein expressions, flow cytometry to measure the content of ROS, immunofluorescence staining to detect the oxidative DNA damage, as well as MTT, AnnexinV-FITC/PI, Wound-healing, and Transwell assays to test the biological characteristics of Eca109 cells.

Results:

H₂O₂ resulted in the increased nuclear and cytoplasmatic expression of β-catenin, reduced p-GSK3β expression, up-regulated ROS content, and induced oxidative DNA damage in Eca109 cells. Moreover, Eca109 cells treated with H₂O₂ alone had enhanced cell proliferation and metastasis but decreased cell apoptosis, as compared with those without any treatment; meanwhile, the declined Cyt C, Bax, and cleaved caspase-3, as well as the elevated Bcl-2 were also observed in Eca109 cells in the H₂O₂ group, which were reversed by Propofol or Dkk1. Moreover, Propofol could inhibit the effect of LiCl on activating the Wnt/β-catenin signaling pathway in H₂O₂-induced Eca109 cells.

Conclusion:

Propofol elicits protective effects to inhibit H₂O₂-induced proliferation and metastasis and promote apoptosis of Eca109 cells via blocking the Wnt/β-catenin pathway, offering a possible therapeutic modality for ESCC.