Curcumol Induces Apoptosis Via Caspases-independent Mitochondrial Pathway in Human Lung Adenocarcinoma ASTC-a-1 Cells

Overview

Journal Med Oncol

Publisher Springer

Specialty Oncology

Date 2010 Feb 4

PMID 20127426

Citations 22

Authors

Weiwei Zhang

Zhiping Wang

Tongsheng Chen

Affiliations

Soon will be listed here.

Abstract

Curcumol isolated from Rhizoma Curcumae, a common traditional Chinese medicine, has been reported to possess antitumor effects, but little is known about the molecular mechanism. The current study tried to explore the molecular mechanism of curcumol-induced cell death in human lung adenocarcinoma (ASTC-a-1) cells. Cell counting kit (CCK-8) assay, fluorescence resonance energy transfer (FRET), confocal fluorescence microscopy imaging, emission spectral analysis, and flow cytometry (FCM) technologies were used to assess the characteristics of curcumol-induced cell death. FCM analysis showed that curcumol induced G(2)/M phase arrest, nuclear fragmentation and phosphatidylserine externalization, implying that curcumol dominantly induced apoptotic cell death. Dynamical imaging showed that curcumol induced a rapid translocation of Bax from cytosol into mitochondria within 6 h, leading to a rapid dissipation of mitochondrial membrane potential (∆Ψm), implying that mitochondria play an important role in the curcumol-induced apoptosis. The fact that Z-VAD-fmk, a broad-spectrum inhibitor of caspases, did not reduce the curcumol-induced apoptosis showed that caspases were not involved in curcumol-induced apoptosis, which was further verified by monitoring the caspase-3 activation inside living cells stably expressing SCAT3, a FRET plasmid. Collectively, we for the first time demonstrated that curcumol induced cell death in a dominant apoptotic fashion via the caspases-independent mitochondrial pathway in ASTC-a-1 cells.

Citing Articles

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