Arthpyrone L, a New Pyridone Alkaloid from a Deep-Sea Arthrinium sp., Inhibits Proliferation of MG63 Osteosarcoma Cells by Inducing G0/G1 Arrest and Apoptosis.


Zhang Y(1), Li M(1), Zhang Q(1), Wang Z(2), Li X(1), Bao J(1), Zhang H(1).
Author information:
(1)School of Biological Science and Technology, University of Jinan, Jinan, 250022, P. R. China.
(2)Shandong Provincial Hospital, Cheeloo College of Medicine, Shandong University, Jinan, 250021, P. R. China.


Fractionation of the ethanol extract of a marine fungus, Arthrinium sp., afforded a new pyridone alkaloid (arthpyrone L (1)), the structure with absolute configuration of which was established by comprehensive spectroscopic analyses. In vitro cell viability assays revealed that compound 1 showed antiproliferative effects toward human A549 (lung), MG63, U2OS (bone), MCF-7 and MDA-MB-231 (breast) cancer cells. MG63 cell lines were chosen for further biological evaluations and presented apoptosis and cell cycle arrest (G0/G1 phase) upon treatment of 1. Subsequent mechanism studies demonstrated that the growth inhibition of 1 against MG63 cells was via activation of caspase-modulated apoptotic pathway and inhibition of PI3K/Akt pathway.