Linked Life Data

12794118

Source:http://linkedlifedata.com/resource/pubmed/id/12794118

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
12
pubmed:dateCreated
2003-6-9
pubmed:abstractText
Inactivation of p53 has been implicated in many types of tumors particularly in non-small cell lung carcinoma, one of the most common cancers in which p53 mutation has been frequently identified. The aim of this study was to investigate the influence of p53 status on the regulation of tumor susceptibility to specific CTL-mediated cell death. For this purpose, we used a cytotoxic T lymphocyte clone, Heu127, able to lyse the human autologous lung carcinoma cell line, IGR-Heu, in a HLA-A2-restricted manner. Direct genomic DNA sequencing revealed that IGR-Heu expresses a mutated p53 at codon 132 of the exon 5 which results in the loss of p53 capacity to induce the expression of the p53-regulated gene product p21(waf/CIP1). Initial experiments demonstrated that IGR-Heu was resistant to Fas, TNF, and TRAIL apoptotic pathways. This correlated with the lack of p55 TNFRI, Fas, DR4, and DR5 expression. The effect of wild-type (wt) p53 restoration on the sensitization of IGR-Heu to autologous CTL clone lysis was investigated following infection of the tumor cell line with a recombinant adenovirus encoding the wt p53 (Adwtp53). We demonstrate that the restoration of wt p53 expression and function resulted in a significant potentiation of target cell susceptibility to CTL-mediated lysis. The wt p53-induced optimization of tumor cell killing by specific CTL involves at least in part Fas-mediated pathway via induction of CD95 expression by tumor cells but does not appear to interfere with granzyme B cytotoxic pathway.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
AIM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jun
pubmed:issn
0022-1767
pubmed:author
pubmed:issnType
Print
pubmed:day
15
pubmed:volume
170
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
5919-26
pubmed:dateRevised
2008-11-21
pubmed:meshHeading
pubmed-meshheading:12794118-Adenoviridae, pubmed-meshheading:12794118-Antigens, CD95, pubmed-meshheading:12794118-Apoptosis, pubmed-meshheading:12794118-Clone Cells, pubmed-meshheading:12794118-Cytotoxicity, Immunologic, pubmed-meshheading:12794118-Cytotoxicity Tests, Immunologic, pubmed-meshheading:12794118-Gene Silencing, pubmed-meshheading:12794118-Genetic Vectors, pubmed-meshheading:12794118-Granzymes, pubmed-meshheading:12794118-Humans, pubmed-meshheading:12794118-Immunity, Innate, pubmed-meshheading:12794118-Mutation, pubmed-meshheading:12794118-Neoplasm Proteins, pubmed-meshheading:12794118-Receptors, Tumor Necrosis Factor, pubmed-meshheading:12794118-Serine Endopeptidases, pubmed-meshheading:12794118-T-Lymphocytes, Cytotoxic, pubmed-meshheading:12794118-Trans-Activators, pubmed-meshheading:12794118-Transcriptional Activation, pubmed-meshheading:12794118-Tumor Cells, Cultured, pubmed-meshheading:12794118-Tumor Suppressor Protein p53
pubmed:year
2003
pubmed:articleTitle
Potentiation of a tumor cell susceptibility to autologous CTL killing by restoration of wild-type p53 function.
pubmed:affiliation
Laboratoire Cytokines et Immunologie des Tumeurs Humaines, Institut National de la Santé et de la Recherche Médicale Unité 487, Institut Fédératif de Recherche 54 Institut Gustave Roussy, Villejuif, France.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't