Linked Life Data

16792412

Source:http://linkedlifedata.com/resource/pubmed/id/16792412

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2006-6-23
pubmed:abstractText
Three new butanolides, kotomolide A (1), isokotomolide A (2), and kotomolide B (3), and a new secobutanolide, secokotomolide A (4), along with 21 known compounds were isolated from the leaves of Cinnamomum kotoense. Their structures were determined by spectroscopic analyses. Compound 4 was found to induce significant cell death in the human HeLa cell line. Apoptotic-related DNA damage can be positively related to the dose of compound 4. The DNA damage was measured by the percentage of subG1 (24 h after the treatment of compound 4) as determined by cell cycle analysis and TUNEL assay. Treatment with 4 significantly increased intracellular H2O2 and/or peroxide, nitric oxide (NO) at 1, 3, and 24 h. Our results also showed that compound 4 induced (a) noticeable reduction of mitochondrial transmembrane potential (DeltaPsi(m)), (b) activation of caspase 3/7, and (c) up-regulation of the p53 expression. Compound 4-induced DNA damage was found to markedly decrease when the cells were pretreated with an intracellular glutathione supplement (glutathione ethyl ester). These results suggest that an increase of H2O2 and/or peroxide by compound 4 is the initial apoptotic event. The intracellular GSH depletion is a critical event in compound 4-induced apoptosis in HeLa cells.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0163-3864
pubmed:author
pubmed:issnType
Print
pubmed:volume
69
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
927-33
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Chemical and cytotoxic constituents from the leaves of Cinnamomum kotoense.
pubmed:affiliation
Graduate Institute of Biopharmaceutics, College of Life Sciences, National Chiayi University, Chiayi 600, Taiwan, Republic of China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't