Corynoline inhibits esophageal squamous cell carcinoma growth via targeting Pim-3

Phytomedicine. 2024 Jan:123:155235. doi: 10.1016/j.phymed.2023.155235. Epub 2023 Dec 12.

Abstract

Background: Esophageal squamous cell carcinoma (ESCC) is an aggressive and deadly malignancy characterized by late-stage diagnosis, therapy resistance, and a poor 5-year survival rate. Finding novel therapeutic targets and their inhibitors for ESCC prevention and therapy is urgently needed.

Methods: We investigated the proviral integration site for maloney murine leukemia virus 3 (Pim-3) protein levels using immunohistochemistry. Using Methyl Thiazolyl Tetrazolium and clone formation assay, we verified the function of Pim-3 in cell proliferation. The binding and inhibition of Pim-3 by corynoline were verified by computer docking, pull-down assay, cellular thermal shift assay, and kinase assay. Cell proliferation, Western blot, and a patient-derived xenograft tumor model were performed to elucidate the mechanism of corynoline inhibiting ESCC growth.

Results: Pim-3 was highly expressed in ESCC and played an oncogenic role. The augmentation of Pim-3 enhanced cell proliferation and tumor development by phosphorylating mitogen-activated protein kinase 1 (MAPK1) at T185 and Y187. The deletion of Pim-3 induced apoptosis with upregulated cleaved caspase-9 and lower Bcl2 associated agonist of cell death (BAD) phosphorylation at S112. Additionally, binding assays demonstrated corynoline directly bound with Pim-3, inhibiting its activity, and suppressing ESCC growth.

Conclusions: Our findings suggest that Pim-3 promotes ESCC progression. Corynoline inhibits ESCC progression through targeting Pim-3.

Keywords: Apoptosis; Corynoline; Esophageal squamous cell carcinoma; Proliferation; Proviral integration site for maloney murine leukemia virus 3.

MeSH terms

  • Animals
  • Apoptosis
  • Berberine Alkaloids*
  • Cell Line, Tumor
  • Cell Movement
  • Cell Proliferation
  • Esophageal Neoplasms* / drug therapy
  • Esophageal Neoplasms* / metabolism
  • Esophageal Squamous Cell Carcinoma* / drug therapy
  • Esophageal Squamous Cell Carcinoma* / pathology
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Mice

Substances

  • corynoline
  • Berberine Alkaloids