Linked Life Data

19699082

Source:http://linkedlifedata.com/resource/pubmed/id/19699082

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
16
pubmed:dateCreated
2009-10-26
pubmed:abstractText
Tumour hypoxia as driving force in tumour progression and treatment resistance has been well established. Assessment of oxygenation status of tumours may provide important prognostic information and improve selection of patients for treatment. In this study, a large homogenous group of 103 laryngeal carcinomas has been investigated in the presence of hypoxia by pimonidazole binding and the usefulness of Carbonic anhydrase IX (CA-IX) and vascular parameters as surrogate markers of hypoxia. These parameters are further related to clinical and biological characteristics. One hundred and three patients with T2-T4 larynx carcinoma were included. They were given the hypoxia marker pimonidazole intravenously (i.v.) 2h prior to taking a biopsy. Expression of all the parameters was examined by immunohistochemistry, excluding large necrotic areas. Among tumours a large variation in pimonidazole positivity (hypoxic fraction based on pimonidazole, HFpimo) (range 0-19%) and CA-IX expression (hypoxic fraction based on CA-IX staining, HFCA-IX) (range 0-34%) was observed. In 67% of the tumours, hypoxia involved 1% of the viable tumour area. HFpimo and HFCA-IX correlated significantly albeit weak (p=0.04). Both parameters showed weak inverse correlations with the relative vascular area (RVA) (p=0.01). HFpimo was further associated with histopathological grade, with poorly differentiated tumours being more hypoxic. The fraction of the tumour area positive for both pimonidazole and CA-IX correlated significantly with N stage. From these results, it was concluded that CA-IX and RVA have only limited value for measuring hypoxia and are not as robust as pimonidazole, probably due to the influence of other factors in the microenvironment. A combination of staining patterns of exogenous and endogenous markers might give important additive information about tumour biology and behaviour.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
1879-0852
pubmed:author
pubmed:issnType
Electronic
pubmed:volume
45
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
2906-14
pubmed:meshHeading
pubmed:year
2009
pubmed:articleTitle
Hypoxia in larynx carcinomas assessed by pimonidazole binding and the value of CA-IX and vascularity as surrogate markers of hypoxia.
pubmed:affiliation
Department of Radiation Oncology, 341, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands. i.hoogsteen@rther.umcn.nl
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't