Linked Life Data

21192922

Source:http://linkedlifedata.com/resource/pubmed/id/21192922

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
3
pubmed:dateCreated
2011-2-1
pubmed:abstractText
High incidence of lymph node spread and distant metastasis make poor prognosis in human nasopharyngeal carcinoma (NPC). Therefore, better treatments for NPC are needed. This study investigated the anticancer activity of 6-O-angeloylenolin, a plant-derived sesquiterpene lactone, on human nasopharyngeal cancer (CNE) cells. 6-O-Angeloylenolin was found to significantly inhibit the proliferation of CNE cells. The rate of inhibition was comparable to that of cisplatin, a well known chemotherapeutic agent used to treat NPC. Further mechanistic studies revealed that 6-O-angeloylenolin caused cell-cycle arrest in the S and G2/M phases and, subsequently, the induction of apoptosis. Rapid repressions of cyclin D1, cyclin D3, p27, cdc25c and p-cdc25c (Ser216) were observed after 1-h treatment, followed by decreases in the expression of CDK4, cdc2 and p-cdc2 (Tyr15) after 12h. Down-regulations of p-Rb (Ser780), p21(Waf1/Cip1), cyclin A, and cyclin E were also detected as later events. Two early events that marked the occurrence of apoptosis were phosphatidylserine exposure and mitochondria membrane potential depletion, which occurred after 12h of treatment, while a sub-G1 peak was also detected after 36-h treatment. Apoptosis induction was further confirmed by other apoptotic features, including nuclear fragmentation, and PARP cleavage. Moreover, 6-O-angeloylenolin caused the release of cytochrome c and AIF to the cytosol by regulating the expression of the Bcl-2 family proteins. However, pretreatment of the general caspase inhibitor failed to attenuate the apoptosis induction effect, suggesting that apoptosis induction of 6-O-angeloylenolin was independent of caspase activation. While 6-O-angeloylenolin also triggered the activation of Akt, ERK and JNK, only the JNK inhibitor significantly decreased the extent of cell death and apoptosis in CNE cells. Taken together, these results suggest the potential applicability of 6-O-angeloylenolin as a candidate for NPC treatment.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
1872-7786
pubmed:author
pubmed:copyrightInfo
Copyright © 2010 Elsevier Ireland Ltd. All rights reserved.
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
189
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
167-76
pubmed:meshHeading
pubmed:year
2011
pubmed:articleTitle
6-O-Angeloylenolin induced cell-cycle arrest and apoptosis in human nasopharyngeal cancer cells.
pubmed:affiliation
The Chinese University of Hong Kong, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't