Journal Article

A proteomic investigation into a human gastric cancer cell line BGC823 treated with diallyl trisulfide

Na Li, Ruifang Guo, Wenmei Li, Jianmin Shao, Shuting Li, Kang Zhao, Xishu Chen, Ningzhi Xu, Siqi Liu and Youyong Lu

in Carcinogenesis

Volume 27, issue 6, pages 1222-1231
Published in print June 2006 | ISSN: 0143-3334
Published online December 2005 | e-ISSN: 1460-2180 | DOI: http://dx.doi.org/10.1093/carcin/bgi306
A proteomic investigation into a human gastric cancer cell line BGC823 treated with diallyl trisulfide

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Garlic is generally used as a therapeutic reagent against various diseases worldwide. Although a great effort is made to understand the pharmaceutical mechanisms of garlic and its derivatives, there are many mysteries to be uncovered. Using proteomic means, herein we have systematically studied the responses of protein expression in BGC823 cells, a gastric cancer cell line, induced by diallyl trisulfide (DATS), a major component of garlic derivatives. A total of 41 unique proteins in BGC823 were detected with significant changes in their expression levels corresponding with DATS administration. Of these proteins, five typical ones, glutathione S-transferase-pi (GST-pi), voltage-dependent anion channel-1 (VDAC-1), Annexin I, Galectin and S100A11, were further examined by Western blotting, resulting in coincident data with the proteomic evidence. Moreover quantitative real-time RT–PCR experiments offered dynamic data of mRNA expression, indicating the responses of Annexin I and GST-pi expression within a short period after DATS treatment. Interestingly, ∼50% of DATS-sensitive proteins (19/41) in BGC823 are tightly associated with apoptotic pathways. These proteomic results presented, therefore, provide additional support to the hypothesis that garlic is a strong inducer of apoptosis in tumor cells.

Keywords: 2DE, two-dimensional electrophoresis; DADS, diallyl disulfide; DATS, diallyl trisulfide; GST-pi, glutathione S-transferase-pi; HGC, Human gastric cancer; LC-MS/MS, tandem mass spectrometry; MALDI-TOF MS, matrix assisted laser desorption ionization time-of-flight mass spectrometry; ROS, reactive oxygen species; VDAC, voltage-dependent anion channel

Journal Article.  6723 words.  Illustrated.

Subjects: Clinical Cytogenetics and Molecular Genetics

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