Document Detail

Anti-proliferative effect of polysaccharides from Salicornia herbacea on induction of G2/M arrest and apoptosis in human colon cancer cells.
MedLine Citation:
PMID:  19996705     Owner:  NLM     Status:  MEDLINE    
In this study, we investigated the anti-proliferative effect of polysaccharides from Salicornia herbacea on HT-29 human colon cancer cells. Crude polysaccharides from S. herbacea (CS) were prepared by extraction with hot steam water, and fine polysaccharides from S. herbacea (PS) were obtained through further size exclusion chromatography. The anti-proliferative effect of CS and PS were measured using the MTS assay, apoptosis analysis, cell cycle analysis, and RT-PCR. HT-29 cells were treated with CS or PS at different dosages (0.5, 1, 2, 4 mg ml(-1)) for 24 or 48 h. CS and PS inhibited proliferation and stimulated apoptosis of cells in a dose-dependent manner. Flow cytometric analysis after Annexin V-FITC and PI staining revealed that treatment with CS or PS increased total apoptotic death of cells to 24.99% or 91.59%, respectively, in comparison with the control (13.51%). PS increased early apoptotic death substantially - up to 12 times more than the control. Treatment with CS or PS resulted in a concentration-dependent increase of the G2/M cell population of the cell cycle as determined by flow cytometry. G2/M arrest was induced significantly with the highest concentration (4 mg ml(-1)) of PS. RT-PCR was performed to study the correlation between G2/M arrest and transcription of cell cycle control genes. The anti-proliferative activity of CS and PS was accompanied by inhibition of cyclin B1, and Cdc 2 mRNA. Moreover, both CS and PS induced expression of the p53 tumor suppressor gene and the Cdk inhibitor p21. These results suggest that polysaccharides from S. herbacea have anti-cancer activity in human colon cancer cells.
Deok-Seon Ryu; Seon-Hee Kim; Dong-Seok Lee
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Journal of microbiology and biotechnology     Volume:  19     ISSN:  1017-7825     ISO Abbreviation:  J. Microbiol. Biotechnol.     Publication Date:  2009 Nov 
Date Detail:
Created Date:  2009-12-09     Completed Date:  2010-06-16     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  9431852     Medline TA:  J Microbiol Biotechnol     Country:  Korea (South)    
Other Details:
Languages:  eng     Pagination:  1482-9     Citation Subset:  IM    
Department of Biomedical Laboratory Science, Inje University, Gimhae 621-749, Korea.
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MeSH Terms
Apoptosis / drug effects*
Cell Division / drug effects*
Chenopodiaceae / chemistry*
Cyclin B / biosynthesis,  genetics
Cyclin B1 / biosynthesis,  genetics
Cyclin-Dependent Kinase Inhibitor p21 / biosynthesis,  genetics
Dose-Response Relationship, Drug
G2 Phase / drug effects*
Gene Expression Regulation, Neoplastic / drug effects
HT29 Cells
Polysaccharides / administration & dosage*,  chemistry
Time Factors
Tumor Suppressor Protein p53 / biosynthesis,  genetics
Reg. No./Substance:
0/CDC2 protein, human; 0/CDKN1A protein, human; 0/Cyclin B; 0/Cyclin B1; 0/Cyclin-Dependent Kinase Inhibitor p21; 0/Polysaccharides; 0/Tumor Suppressor Protein p53

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