RRC ID 63023
著者 Tawila AM, Sun S, Kim MJ, Omar AM, Dibwe DF, Awale S.
タイトル A Triterpene Lactone from Callistemon citrinus Inhibits the PANC-1 Human Pancreatic Cancer Cells Viability through Suppression of Unfolded Protein Response.
ジャーナル Chem Biodivers
Abstract Human pancreatic tumor cells such as PANC-1 are known for their ability to tolerate nutrient starvation and thrive under the hypovascular tumor microenvironment, a phenomenon termed as 'austerity'. A search of agents that preferentially inhibit the cancer cell viability under the starvation condition without toxicity in the nutrient-rich condition is a promising approach in anticancer drug discovery. In this study, a triterpene lactone, 3β-hydroxy-13,28-epoxyurs-11-en-28-one (ursenolide), isolated from a Callistemon citrinus extract has shown strong preferential cytotoxicity against PANC-1 cells under nutrient starvation with PC50 value of 0.4 μm. Ursenolide-induced rounding of PANC-1 cell morphology followed by rupture of the cell membrane leading to cell death. In a real-time cell migration study, ursenolide was found to inhibit PANC-1 cell migration significantly. Mechanistically, it inhibited GRP78 and GRP94 under the starvation condition suggesting inhibition of unfolded protein response (UPR), an adaptive process of cell survival during starvation. It also inhibited the phosphorylation of the key survival protein Akt and mTOR. Overall results suggested that ursenolide is a potential anticancer agent against pancreatic cancer.
巻・号 17(10)
ページ e2000495
公開日 2020-10-1
DOI 10.1002/cbdv.202000495
PMID 32865330
MeSH Antineoplastic Agents, Phytogenic / chemistry Antineoplastic Agents, Phytogenic / isolation & purification Antineoplastic Agents, Phytogenic / pharmacology* Cell Proliferation / drug effects Cell Survival / drug effects Drug Screening Assays, Antitumor Endoplasmic Reticulum Chaperone BiP Heat-Shock Proteins / antagonists & inhibitors* Heat-Shock Proteins / metabolism Humans Lactones / chemistry Lactones / isolation & purification Lactones / pharmacology* Membrane Glycoproteins / antagonists & inhibitors* Membrane Glycoproteins / metabolism Molecular Conformation Myrtaceae / chemistry* Pancreatic Neoplasms / drug therapy* Pancreatic Neoplasms / pathology Protein Unfolding / drug effects Triterpenes / chemistry Triterpenes / isolation & purification Triterpenes / pharmacology* Tumor Cells, Cultured
IF 2.039
リソース情報
ヒト・動物細胞 PANC-1(RCB2095)