Linked Life Data

12964965

Source:http://linkedlifedata.com/resource/pubmed/id/12964965

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
7
pubmed:dateCreated
2003-9-10
pubmed:abstractText
To investigate differences in gene expression between normal thyroid tissue and papillary thyroid carcinomas, we performed differential display (DD) polymerase chain reaction (PCR) using total RNA from fresh-frozen surgically removed thyroid specimens. Four DD fragments that were overexpressed in tumor tissue were identified as parts of genes from the mitochondrial genome: nicotinamide adenine dinucleotide (NADH) dehydrogenase 5, adenosine triphosphate (ATP) synthase 6, cytochrome b, and cytochrome c oxidase I. The expression profiles of these genes were confirmed by hybridization using a DNA dot-blot array and radioactively labeled complex cDNA probes generated from tumor (30 biopsies) and nontumor (15 biopsies) total RNA. Cytochrome c oxidase III was also found to be overexpressed in papillary carcinomas, while the nuclear-encoded mitochondrial transcription factor A showed similar mRNA expression levels in tumor and nontumor tissue. Electron microscopy showed increased number and size of mitochondria in papillary carcinomas. Immunohistochemistry using a monoclonal antibody recognizing a nuclear-encoded mitochondrial protein showed positivity in all cases of papillary carcinoma (44 samples), while normal thyroid tissue (34 samples) was negative in all cases except 3, in which there was a weak, focal cytoplasmic staining. We conclude that papillary thyroid carcinomas show increased expression of mitochondrial mRNA and proteins, encoded by nuclear as well as mitochondrial genes.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jul
pubmed:issn
1050-7256
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
613-20
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
2003
pubmed:articleTitle
Increased expression of genes encoding mitochondrial proteins in papillary thyroid carcinomas.
pubmed:affiliation
Department of Oncology, Haukeland University Hospital, Bergen, Norway; and Department of Molecular Biology, University of Bergen, Bergen, Norway. dagny.naugen@haukeland.no
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't