© 1999 by Oxford University Press
Journal of the National Cancer Institute, Vol. 91, No. 18, 1563-1568,
September 15, 1999
© 1999 Oxford University Press
REPORTS |
Novel Tumor Suppressor Locus in Human Chromosome Region 3p14.2
Affiliation of authors: Innere Klinik und Poliklinik (Tumorforschung), Universitätsklinikum Essen, Germany.
Correspondence to: Bertram Opalka, Ph.D., Innere Klinik und Poliklinik (Tumorforschung), Universitätsklinikum Essen, Hufelandstr. 55, D-45122 Essen, Germany (e-mail: bertram.opalka{at}uni-essen.de).
or
Correspondence to:Jochen Schütte, M.D., Innere
Klinik und Poliklinik (Tumorforschung), Universitätsklinikum Essen, Hufelandstr. 55,
D-45122 Essen, Germany (e-mail: jochen.schuette{at}uni-essen.de).
BACKGROUND: Alterations of chromosome region 3p14 are observed in numerous human malignancies. Because the pattern of allelic losses suggests the existence of at least one tumor suppressor gene within this region, we established a library of yeast artificial chromosomes (YACs) containing contiguous human 3p14 sequences to permit a search for tumor suppressor loci within the 3p14 region by use of functional complementation. METHODS: YACs specific for human chromosome region 3p14 were transduced by spheroplast fusion into cells of the human nonpapillary renal carcinoma cell line RCC-1, which shows a cytogenetically detectable 3p deletion and is tumorigenic in nude mice. RESULTS: We identified a 3p14.2-specific YAC clone, located in the vicinity of the fragile histidine triad (FHIT) gene (but toward the telomere), that is capable of inducing sustained suppression of tumorigenicity in nude mice and of activating cellular senescence in vitro. Among 23 mice given injections of RCC-1 cells containing this YAC, 16 (70%) remained tumor free for at least 6 months, whereas tumor formation occurred after a median of 6 weeks in control mice given injections of either RCC-1 parental cells or a revertant cell line (in which the YAC had lost all human sequences) or RCC-1 parental cells containing other, unrelated YACs. Similar results were obtained following microcell-mediated transfer of the entire human chromosome 3. CONCLUSION: These data provide strong evidence for the existence of a novel tumor suppressor locus adjacent to the previously identified candidate tumor suppressor gene, FHIT, in 3p14.2. Positional cloning of the novel suppressor element within the 3p14.2-specific YAC and the sequence's molecular and functional characterization should add to the understanding of the pathogenesis of renal cell carcinoma and other human tumors that exhibit 3p14 aberrations.
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