Linked Life Data

8938953

Source:http://linkedlifedata.com/resource/pubmed/id/8938953

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
6
pubmed:dateCreated
1997-1-16
pubmed:abstractText
Metastatic renal cell carcinoma (RCC) is a tumor with a poor prognosis resistant to chemotherapy and irradiation. However, in rare cases, spontaneous regressions of metastases after nephrectomy have been reported that were ascribed to destruction of the tumor by the immune system. In earlier studies, we and others identified the expression of modified antigens in RCC. In particular, a concanavalin A-binding isoform of gamma-glutamyltransferase (gamma GT) comprises about 50% of the enzymatic activity found in the tumor tissue of many RCC patients. The monoclonal antibody 138H11, directed against all human gamma GT isoforms, revealed a membranous expression of gamma GT around RCC cells compared to the restricted, apical pattern of renal cells. These data raised the question why the RCC-specific gamma GT, exposed to the immune system in vivo, is not immunogenic in patients with RCC. To address this question, we generated mouse hybridomas against highly purified human RCC gamma GT. Although we obtained a large panel of hybridomas that produced antibodies reacting immunohistochemically in a gamma GT-specific manner, all antibodies stained normal kidney gamma GT as well as RCC gamma GT. These results suggest that the biochemical features specific for RCC gamma GT are not necessarily reflected by specific antigenic determinants that could be differentiated by the immune system of the challenged mice. The lack of immunogenic epitopes different from normal gamma GT enzyme may offer an explanation why gamma GT produced by RCC can escape immunological surveillance.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:issn
1010-4283
pubmed:author
pubmed:issnType
Print
pubmed:volume
17
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
369-77
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Hybridomas reveal shared immunodominant epitopes of gamma-glutamyltransferase isoforms from human kidney and renal cell carcinoma.
pubmed:affiliation
Department of Pediatrics, Charité, Humboldt University, Berlin, Germany.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't