Paraptosis and NF-κB activation are associated with protopanaxadiol-induced cancer chemoprevention
Language: 
English
Abstract: 

BACKGROUND: Protopanaxadiol (PPD) is a triterpenoid that can be prepared from steamed ginseng. PPD possesses anticancer potential via caspase-dependent apoptosis. Whether paraptosis, a type of the caspase-independent cell death, is also induced by PPD has not been evaluated. METHODS: Cell death, the cell cycle and intracellular reactive oxygen species (ROS) were analyzed by flow cytometry after staining with annexin V/PI, PI/RNase or H2DCFDA. We observed morphological changes by crystal violet staining assay. Mitochondrial swelling was measured by ultraviolet-visible spectrophotometry. The activation of NF-κB was measured by luciferase reporter assay. RESULTS: At comparable concentrations of 5-fluorouracil, PPD induced more cell death in human colorectal cancer cell lines HCT-116 and SW-480. We demonstrated that PPD induced paraptosis in these cancer cells. PPD treatment significantly increased the percentage of cancer cells with cytoplasmic vacuoles. After the cells were treated with PPD and cycloheximides, cytoplasmic vacuole generation was inhibited. The paraptotic induction effect of PPD was also supported by the results of the mitochondrial swelling assay. PPD induced ROS production in cancer cells, which activated the NF-κB pathway. Blockage of ROS by NAC or PS-1145 inhibited the activation of NF-κB signaling. CONCLUSIONS: PPD induces colorectal cancer cell death in part by induction of paraptosis. The anticancer activity of PPD may be enhanced by antioxidants such as green tea, which also inhibit the activation of NF-κB signaling.

Author(s): 
Wang, Chong-Zhi
Li, Binghui
Wen, Xiao-Dong
Zhang, Zhiyu
Yu, Chunhao
Calway, Tyler D.
He, Tong-Chuan
Du, Wei
Yuan, Chun-Su
Item Type: 
Journal Article
Publication Title: 
BMC complementary and alternative medicine
Journal Abbreviation: 
BMC Complement Altern Med
Publication Date: 
2013
Publication Year: 
2013
Pages: 
2
Volume: 
13
ISSN: 
1472-6882
DOI: 
10.1186/1472-6882-13-2
Library Catalog: 
NCBI Published Medical (?)
Extra: 
PMID: 23281928 PMCID: PMC3575249

Turabian/Chicago Citation

Chong-Zhi Wang, Binghui Li, Xiao-Dong Wen, Zhiyu Zhang, Chunhao Yu, Tyler D. Calway, Tong-Chuan He, Wei Du and Chun-Su Yuan. 2013. "Paraptosis and NF-κB activation are associated with protopanaxadiol-induced cancer chemoprevention." BMC complementary and alternative medicine 13: 2. 10.1186/1472-6882-13-2.

Wikipedia Citation

<ref> {{Cite journal | doi = 10.1186/1472-6882-13-2 | issn = 1472-6882 | volume = 13 | pages = 2 | last = Wang | first = Chong-Zhi | coauthors = Li, Binghui, Wen, Xiao-Dong, Zhang, Zhiyu, Yu, Chunhao, Calway, Tyler D., He, Tong-Chuan, Du, Wei, Yuan, Chun-Su | title = Paraptosis and NF-κB activation are associated with protopanaxadiol-induced cancer chemoprevention | journal = BMC complementary and alternative medicine | date = 2013 | pmid = | pmc = }} </ref>