Linked Life Data

14756450

Source:http://linkedlifedata.com/resource/pubmed/id/14756450

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
2004-2-3
pubmed:abstractText
To examine p53-dependency in hyperthermic cancer therapy, heat-induced growth inhibition and apoptosis in transplanted human head and neck squamous cell carcinoma (HNSCC) tumours were analysed with different status of p53 into nude mice. The tumour tissue from HNSCC cell line (SAS) transfected with mutant p53 gene (SAS/mp53) or control vector containing neo gene (SAS/neo) was transplanted into the subcutaneous tissue of the thigh of nude mice using a trocar. Hyperthermia was performed at 42 degrees C when the mean diameter of tumour was 5-6mm. The diameter of tumours was measured using vernier calipers and tumour weight (TW) and the relative tumour weight (RW) was calculated. Tumour regrowth delay was evaluated when the RW reached 5-fold against the control group. The accumulation of p53 and Bax proteins was examined by an immunohistochemical technique. Apoptotic cells in the sections were detected by staining of DNA ends using an immunohistochemical technique. SAS/mp53 tumours showed more heat-resistance than SAS/neo tumours. The p53-positively staining cells were observed in untreated SAS/mp53 tumours, but not in untreated SAS/neo tumours. After heat treatment, the accumulation of p53 and Bax proteins was observed in SAS/neo tumours, but little in SAS/mp53 tumours. The incidence of apoptotic cells induced by heat treatment was very low in SAS/mp53 tumours compared with SAS/neo tumours. In conclusion, the heat-induced growth inhibition of a transplanted HNSCC may be correlated with the induction of p53-dependent Bax-mediated apoptosis. Thus, p53 status appears to be one of the useful parameters for the predictive assays in hyperthermic cancer therapy.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
0265-6736
pubmed:author
pubmed:issnType
Print
pubmed:volume
19
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
590-7
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:articleTitle
Heat-induced growth inhibition and apoptosis in transplanted human head and neck squamous cell carcinomas with different status of p53.
pubmed:affiliation
Department of Oncoradiology, Nara Medical University, Kashihara, Nara 634-8521, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't