Linked Life Data

19167340

Source:http://linkedlifedata.com/resource/pubmed/id/19167340

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
2009-3-2
pubmed:abstractText
Global DNA hypomethylation in tumor tissue is a common characteristic in a variety of malignancies such as breast, colon, oral, lung, and blood cancers. A rapid and sensitive method has been developed for the determination of global DNA methylation in cells. Five substances--2'-deoxycytidine (dC), 5-methyl 2'-deoxycytidine (mdC), 2'-deoxyadenosine (dA), 2'-deoxythymidine (dT), and 2'-deoxyguanosine (dG)--were completely separated by high-performance capillary electrophoresis in 10 min. Intraday coefficient of variation was less than 1%, and interday coefficient of variation was less than 2%. The minimal detection limit was 1 microM. Acquired drug resistance to methotrexate (MTX) is one of the most serious problems in cancer chemotherapy. Under optimal conditions, we analyzed global DNA methylation levels in A549 and A549/MTX cells, and only 10(5) cells are needed to obtain reliable results. The percentage of 5-methyl-2'-deoxycytidine (5-mC) was 4.80+/-0.52% in A549 cells, and this decreased to 4.20+/-0.44% in A549/MTX cells. It was considered as statistically significant. This demonstrated that the mechanisms of acquired drug resistance to MTX might be concerned with DNA methylation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Apr
pubmed:issn
1096-0309
pubmed:author
pubmed:issnType
Electronic
pubmed:day
1
pubmed:volume
387
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
71-5
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
High-performance capillary electrophoretic method for the quantification of global DNA methylation: application to methotrexate-resistant cells.
pubmed:affiliation
Anhui Provincial Center for Clinical Laboratories, Anhui Provincial Hospital Affilated to Anhui Medical University, Hefei, China.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't