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Induction of Apoptosis Signaling by Glycoprotein of Capsosiphon fulvescens in Human Gastric Cancer (AGS) Cells.
MedLine Citation:
PMID:  22591240     Owner:  NLM     Status:  Publisher    
Abstract/OtherAbstract:
Capsosiphon fulvescens is a well-known green sea algae that has been touted in recent years as a potential anticancer drug. In this study, C. fulvescens glycoprotein (Cf-GP) showed proapoptotic signaling in AGS cells. An MTS assay indicated that Cf-GP inhibited the proliferation of AGS cell lines in a dose-dependent manner. Cells were treated with Cf-GP and the expression of proteins associated with apoptosis was examined by Western blotting. Based on the Western blot, expression of Cf-GP-activated caspase-cascade and PARP, which is a substrate of caspase-3 and -8, and proteins of the Bcl-2 family was observed. Cf-GP treatment stimulated the release of cytochrome C and apoptotic protease activating factor-1 from mitochondria to the cytosol. Cf-GP inhibited the growth of AGS cells through induction of sub-G1 phase arrest. We confirmed that sub-G1-phase arrest was associated with a decrease in the expression of cyclin D, cyclin E, Cdk2, Cdk4, and Cdk6, and an increase in the protein levels of p21 and p27. As a result, the increased sub-G1 ratio appears to be inhibited by cell proliferation. Therefore, we can confirm apoptosis in the AGS cells. Our results suggest that Cf-GP could be a potential source of biofunctional material that shows anticancer effects in human gastrointestinal cancer.
Authors:
Young-Min Kim; In-Hye Kim; Taek-Jeong Nam
Publication Detail:
Type:  JOURNAL ARTICLE     Date:  2012-5-16
Journal Detail:
Title:  Nutrition and cancer     Volume:  -     ISSN:  1532-7914     ISO Abbreviation:  -     Publication Date:  2012 May 
Date Detail:
Created Date:  2012-5-17     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  7905040     Medline TA:  Nutr Cancer     Country:  -    
Other Details:
Languages:  ENG     Pagination:  -     Citation Subset:  -    
Affiliation:
a Department of Food Science and Nutrition , Pukyong National University , Busan , Republic of Korea.
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