Linked Life Data

9794240

Source:http://linkedlifedata.com/resource/pubmed/id/9794240

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
1998-11-12
pubmed:abstractText
Mice bred to carry germline Rb and p53 null alleles are associated with a tumor spectrum that overlaps with the inherited multiple endocrine neoplasia-1 (MEN1) and MEN2 syndromes in humans, including medullary thyroid cancer (MTC). To study the genetic basis for these tumors, we microdissected MTC specimens or obtained fresh MTC tissue from nine independent Rb(+/-) p53(+/-) mice, amplified the region of the Ret gene known to be mutated in human MTC, and detected acquired missense Ret mutations in four different mice. These mutations were localized to a group of tandem cysteines which are analogous to activating germline mutations observed in human MEN2A and familial MTC (FMTC). To determine whether the remaining wild type Rb allele was inactivated in these murine MTC samples, we subjected tumor tissue to immunohistochemical staining with an Rb antibody, and demonstrated the absence of RB staining in murine MTC, while normal tissue retained RB nuclear staining. These findings demonstrate the ability of the gene knockout model to recapitulate somatic multi-step tumorigenesis and suggest that the development of a murine neuroendocrine tumor requires mutational dysregulation within both receptor tyrosine kinase and nuclear tumor suppressor gene pathways.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
0950-9232
pubmed:author
pubmed:issnType
Print
pubmed:day
24
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1625-8
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1998
pubmed:articleTitle
RET cooperates with RB/p53 inactivation in a somatic multi-step model for murine thyroid cancer.
pubmed:affiliation
Department of Genetics, National Cancer Institute and National Naval Medical Center, Bethesda, Maryland 20889, USA.
pubmed:publicationType
Journal Article