clove and Pancreatic-Neoplasms

Human pancreatic cancer is resistant to almost all conventional chemotherapeutic agents. It is known to proliferate aggressively within hypovascular tumor microenvironment by exhibiting remarkable tolerance to nutrition starvation,  a phenomenon termed as "austerity". Search for the new agents that eliminate the tolerance of cancer cells to nutrition starvation is a promising strategy in anticancer drug discovery. In this study, two new meroterpenoids named callistrilones O and P (1 and 2) together with eight known triterpenes (3-10) were isolated from the active dichloromethane extract of Callistemon citrinus leaves. The structure elucidation of the new compounds was achieved by HRFABMS, 1D, 2D NMR, and ECD quantum calculations. All isolated compounds were tested for their preferential cytotoxicity against PANC-1 human pancreatic cancer cells. Among these, callistrilone O (1) exhibited the most potent preferential cytotoxicity with a PC

Topics: Antineoplastic Agents, Phytogenic; Cell Death; Cell Line, Tumor; Cell Proliferation; Dose-Response Relationship, Drug; Drug Screening Assays, Antitumor; Egypt; Humans; Molecular Structure; Myrtaceae; Pancreatic Neoplasms; Structure-Activity Relationship; Terpenes; Tumor Microenvironment

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 PC

Topics: Antineoplastic Agents, Phytogenic; Cell Proliferation; Cell Survival; Drug Screening Assays, Antitumor; Endoplasmic Reticulum Chaperone BiP; Heat-Shock Proteins; Humans; Lactones; Membrane Glycoproteins; Molecular Conformation; Myrtaceae; Pancreatic Neoplasms; Protein Unfolding; Triterpenes; Tumor Cells, Cultured

Topics: Antineoplastic Agents, Phytogenic; Antioxidants; Australia; Cell Line, Tumor; Cell Survival; Humans; Myrtaceae; Pancreatic Neoplasms; Phytochemicals; Plant Extracts; Plant Leaves; Saponins