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Advances in Brief |
Howard Hughes Medical Institute [B. V.], Johns Hopkins Oncology Center [I-M. S., W. Z., S. N. G., C. L., K. W. K., B. V.], and Department of Pathology [I-M. S.], Johns Hopkins Medical Institutions, Baltimore, Maryland 21231
Chromosomal instability is believed to be a common feature of most human tumors, but the stage at which such instability originates has not been defined. At the molecular level, chromosomal instability is characterized by allelic imbalance (AI), representing losses or gains of defined chromosomal regions. We have assessed AI in early colorectal tumors using newly developed methods for assessing AI in complex cell populations. A total of 32 adenomas of average size (2 mm; range, 13 mm) were studied. AI of chromosome 5q markers occurred in 55% of tumors analyzed, consistent with a gatekeeping role of the adenomatous polyposis coli tumor suppressor gene located at chromosomal position 5q21. AI was also detected in each of the other four chromosomes tested. The fractions of adenomas with AI of chromosomes 1p, 8p, 15q, and 18q were 10, 19, 28, and 28%, respectively. Over 90% of the tumors exhibited AI of at least one chromosome, and 67% had allelic imbalance of a chromosome other than 5q. These findings demonstrate that AI is a common event, even in very small tumors, and suggest that chromosomal instability occurs very early during colorectal neoplasia.
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O. M. Sieber, K. Heinimann, P. Gorman, H. Lamlum, M. Crabtree, C. A. Simpson, D. Davies, K. Neale, S. V. Hodgson, R. R. Roylance, et al. Analysis of chromosomal instability in human colorectal adenomas with two mutational hits at APC PNAS, December 24, 2002; 99(26): 16910 - 16915. [Abstract] [Full Text] [PDF] |
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M. A. Nowak, N. L. Komarova, A. Sengupta, P. V. Jallepalli, I.-M. Shih, B. Vogelstein, and C. Lengauer The role of chromosomal instability in tumor initiation PNAS, December 10, 2002; 99(25): 16226 - 16231. [Abstract] [Full Text] [PDF] |
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H.-W. Chang, S. M. Lee, S. N. Goodman, G. Singer, S. K. R. Cho, L. J. Sokoll, F. J. Montz, R. Roden, Z. Zhang, D. W. Chan, et al. Assessment of Plasma DNA Levels, Allelic Imbalance, and CA 125 as Diagnostic Tests for Cancer J Natl Cancer Inst, November 20, 2002; 94(22): 1697 - 1703. [Abstract] [Full Text] [PDF] |
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A. K. Meeker, J. L. Hicks, E. A. Platz, G. E. March, C. J. Bennett, M. J. Delannoy, and A. M. De Marzo Telomere Shortening Is an Early Somatic DNA Alteration in Human Prostate Tumorigenesis Cancer Res., November 15, 2002; 62(22): 6405 - 6409. [Abstract] [Full Text] [PDF] |
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E. G. Luebeck and S. H. Moolgavkar Multistage carcinogenesis and the incidence of colorectal cancer PNAS, November 12, 2002; 99(23): 15095 - 15100. [Abstract] [Full Text] [PDF] |
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H. Rubin and G. R. Anderson Correspondence re: G. Anderson et al., Intrachromosomal Genomic Instability in Human Sporadic Colorectal Cancer Measured by Genome-Wide Allelotyping and Inter-(Simple Sequence Repeat) PCR. Cancer Res., 61: 8274-8283, 2001. Cancer Res., November 1, 2002; 62(21): 6350 - 6351. [Full Text] [PDF] |
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N. T. van Heek, A. K. Meeker, S. E. Kern, C. J. Yeo, K. D. Lillemoe, J. L. Cameron, G. J. A. Offerhaus, J. L. Hicks, R. E. Wilentz, M. G. Goggins, et al. Telomere Shortening Is Nearly Universal in Pancreatic Intraepithelial Neoplasia Am. J. Pathol., November 1, 2002; 161(5): 1541 - 1547. [Abstract] [Full Text] [PDF] |
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H.-W. Chang, C.-Y. Yen, S.-Y. Liu, G. Singer, and I.-M. Shih Genotype Analysis Using Human Hair Shaft Cancer Epidemiol. Biomarkers Prev., September 1, 2002; 11(9): 925 - 929. [Abstract] [Full Text] [PDF] |
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R. J. Oldt III, R. J. Kurman, and I.-M. Shih Molecular Genetic Analysis of Placental Site Trophoblastic Tumors and Epithelioid Trophoblastic Tumors Confirms Their Trophoblastic Origin Am. J. Pathol., September 1, 2002; 161(3): 1033 - 1037. [Abstract] [Full Text] [PDF] |
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B. W. Kirk, M. Feinsod, R. Favis, R. M. Kliman, and F. Barany Single nucleotide polymorphism seeking long term association with complex disease Nucleic Acids Res., August 1, 2002; 30(15): 3295 - 3311. [Abstract] [Full Text] [PDF] |
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H.-W. Chang, S. Z. Ali, S. K. R. Cho, R. J. Kurman, and I.-M. Shih Detection of Allelic Imbalance in Ascitic Supernatant by Digital Single Nucleotide Polymorphism Analysis Clin. Cancer Res., August 1, 2002; 8(8): 2580 - 2585. [Abstract] [Full Text] [PDF] |
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K. M. Haigis, J. G. Caya, M. Reichelderfer, and W. F. Dove Intestinal adenomas can develop with a stable karyotype and stable microsatellites PNAS, June 25, 2002; 99(13): 8927 - 8931. [Abstract] [Full Text] [PDF] |
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A. Fabarius, A. Willer, G. Yerganian, R. Hehlmann, and P. Duesberg Specific aneusomies in Chinese hamster cells at different stages of neoplastic transformation, initiated by nitrosomethylurea PNAS, May 14, 2002; 99(10): 6778 - 6783. [Abstract] [Full Text] [PDF] |
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G. Singer, R. J. Kurman, H.-W. Chang, S. K.R. Cho, and I.-M. Shih Diverse Tumorigenic Pathways in Ovarian Serous Carcinoma Am. J. Pathol., April 1, 2002; 160(4): 1223 - 1228. [Abstract] [Full Text] [PDF] |
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W.-Q. Ding, S. M. Kuntz, and L. J. Miller A Misspliced Form of the Cholecystokinin-B/Gastrin Receptor in Pancreatic Carcinoma: Role of Reduced Cellular U2AF35 and a Suboptimal 3'-Splicing Site Leading to Retention of the Fourth Intron Cancer Res., February 1, 2002; 62(3): 947 - 952. [Abstract] [Full Text] [PDF] |
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F. Bunz, C. Fauth, M. R. Speicher, A. Dutriaux, J. M. Sedivy, K. W. Kinzler, B. Vogelstein, and C. Lengauer Targeted Inactivation of p53 in Human Cells Does Not Result in Aneuploidy Cancer Res., February 1, 2002; 62(4): 1129 - 1133. [Abstract] [Full Text] [PDF] |
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C. Lengauer How do tumors make ends meet? PNAS, October 23, 2001; 98(22): 12331 - 12333. [Full Text] [PDF] |
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M. Chicurel Dangerous Liaisons Sci. Aging Knowl. Environ., October 3, 2001; 2001(1): oa3 - 3. [Abstract] [Full Text] [PDF] |
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I.-M. Shih, T.-L. Wang, G. Traverso, K. Romans, S. R. Hamilton, S. Ben-Sasson, K. W. Kinzler, and B. Vogelstein Top-down morphogenesis of colorectal tumors PNAS, February 15, 2001; (2001) 51629398. [Abstract] [Full Text] |
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I.-M. Shih, T.-L. Wang, G. Traverso, K. Romans, S. R. Hamilton, S. Ben-Sasson, K. W. Kinzler, and B. Vogelstein Top-down morphogenesis of colorectal tumors PNAS, February 27, 2001; 98(5): 2640 - 2645. [Abstract] [Full Text] [PDF] |
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