Linked Life Data

12165656

Source:http://linkedlifedata.com/resource/pubmed/id/12165656

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2002-8-7
pubmed:abstractText
We analyzed the expression of Pit-1 and growth hormone-releasing hormone receptor (GHRH-R) mRNA in various types of functioning and nonfunctioning adenomas using a quantitative reverse transcriptase polymerase chain reaction (RT-PCR) method. Among clinically nonfunctioning adenomas, tumors considered as silent adenomas were reclassified on a pathologic basis. Competitive RT-PCR showed that the levels of Pit-1 and GHRH-R mRNA expression in silent somatotroph adenomas and silent prolactinomas were similar to those in the corresponding functioning adenomas. In silent thyrotroph adenomas, both mRNAs showed high levels of expression that were similar to those in functioning and silent somatotroph adenomas. The results suggest that the cause of the silence in these tumors seems to be in the downstream to transcription of Pit-1 gene in the signaling pathway leading to hormone secretion. Competitive RT-PCR assay could distinguish silent adenomas of the Pit-1 group from the other nonfunctioning adenomas in the expression levels of Pit-1 and GHRH-R mRNAs. In the future, precise diagnosis of various adenomas may become possible by assaying transcription factors such as steroidogenic factor-1 and thyrotroph embryonic factor, which are thought to be related to adenohypophyseal cytodifferentiation.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1046-3976
pubmed:author
pubmed:issnType
Print
pubmed:volume
13
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
83-98
pubmed:dateRevised
2009-8-12
pubmed:meshHeading
pubmed-meshheading:12165656-Adenoma, pubmed-meshheading:12165656-Adult, pubmed-meshheading:12165656-Aged, pubmed-meshheading:12165656-Base Sequence, pubmed-meshheading:12165656-DNA-Binding Proteins, pubmed-meshheading:12165656-Female, pubmed-meshheading:12165656-Gene Expression, pubmed-meshheading:12165656-Humans, pubmed-meshheading:12165656-Immunohistochemistry, pubmed-meshheading:12165656-Male, pubmed-meshheading:12165656-Microscopy, Electron, pubmed-meshheading:12165656-Middle Aged, pubmed-meshheading:12165656-Pituitary Neoplasms, pubmed-meshheading:12165656-RNA, Messenger, pubmed-meshheading:12165656-Receptors, Neuropeptide, pubmed-meshheading:12165656-Receptors, Pituitary Hormone-Regulating Hormone, pubmed-meshheading:12165656-Reverse Transcriptase Polymerase Chain Reaction, pubmed-meshheading:12165656-Sequence Analysis, DNA, pubmed-meshheading:12165656-Steroidogenic Factor 1, pubmed-meshheading:12165656-Transcription Factor Pit-1, pubmed-meshheading:12165656-Transcription Factors
pubmed:year
2002
pubmed:articleTitle
Expression of Pit-1 and growth hormone-releasing hormone receptor mRNA in human pituitary adenomas: difference among functioning, silent, and other nonfunctioning adenomas.
pubmed:affiliation
Department of Neurosurgery, Kitasato University School of Medicine, Sagamihara, Kanagawa, Japan.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't