Linked Life Data

10602512

Source:http://linkedlifedata.com/resource/pubmed/id/10602512

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
52
pubmed:dateCreated
2000-1-13
pubmed:abstractText
Accurate phosphorylation of tyrosine residues in proteins plays a central role in regulation of cellular function. Although connections between aberrant tyrosine kinase activity and malignancy are well-established, significantly less is known about the roles of protein tyrosine phosphatases (PTPases) in tumorigenesis. We have previously shown that the transmembranal form of PTPase Epsilon (PTPepsilon) is upregulated in mouse mammary tumors initiated specifically by ras or neu, suggesting that PTPepsilon may play a role in transformation by these two oncogenes. In order to test this notion in vivo, we created transgenic mice that express elevated levels of PTPepsilon in their mammary epithelium by use of the MMTV promoter/enhancer. Following several cycles of pregnancy female MMTV-PTPepsilon mice uniformly developed pronounced and persistent mammary hyperplasia which was accompanied by residual milk production. Solitary mammary tumors were often detected secondary to mammary hyperplasia. The sporadic nature of the tumors, the long latency period prior to their development, and low levels of transgene expression in the tumors indicate that PTPepsilon provides a necessary, but insufficient, signal for oncogenesis. The results provide genetic evidence that PTPepsilon plays an accessory role in production of mammary tumors in a manner consistent with its upregulation in mammary tumors induced by ras or neu.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Dec
pubmed:issn
0950-9232
pubmed:author
pubmed:issnType
Print
pubmed:day
9
pubmed:volume
18
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
7535-42
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed:year
1999
pubmed:articleTitle
Protein tyrosine phosphatase epsilon increases the risk of mammary hyperplasia and mammary tumors in transgenic mice.
pubmed:affiliation
Department of Molecular Genetics, The Weizmann Institute of Science, Rehovot 76100, Israel.
pubmed:publicationType
Journal Article