Abstract
p53 is a tumor suppressor gene found on the short arm of chromosome 17. Loss of onep53 allele and alteration of the other is found in a variety of tumors, including highgrade glial tumors. Point mutations in the remaining allele occur in a highly conserved region of the gene encompassing exons 5–8. Although 40–50% of medulloblastomas lose sequences on the short arm of chromosome 17, alteration ofp53 in these tumors is infrequent. To further characterize genetic alteration ofp53 in medulloblastoma, we performed a mutational analysis of four medulloblastoma-derived cell lines established by our laboratory. Using two variable-number tandem repeat markers which map distally top53, we found evidence indicating loss of sequences on the distal end of chromosome 17 p in all four lines. However, no gross alterations of thep53 gene were detected. Northern analysis revealed expression of equivalent amounts of full-lengthp53 messenger RNA in each cell line. Using the polymerase chain reaction to amplify exons 5–8 of thep53 gene, we directly sequenced the amplified fragments and detected no mutations in any of the cell lines. Our results demonstrate that loss ofp53 function through gene deletion and/or recesive mutation is not required for growth in our cell lines.
Similar content being viewed by others
References
Biegel JA, Burk CD, Barr F, Emmanuel BS (1992) Evidence for a 17p tumor related locus distinct from p53 in pediatric primitive neuroectodermal tumors. Cancer Res 52:3391–3395
Clarke AR, Purdie CA, Harrison DJ, Morris RG, Bird CC, Hooper ML, Wylie AH (1993) Thymocyte apoptosis induced by p53-dependent and indepent pathways. Nature 363: 849–852
Cogen PH, Daneshvar L, Metzger AK, Edward MSB (1990) Deletion mapping of the medulloblastoma locus on chromosome 17p. Genomics 8:279–285
Deimling A von, Eibl RH, Ohgaki H, Louis DN, Ammon K von, Peterson I, Kleihues P, Chung RY, Wiestler OD, Seizinger BR (1992) p53 mutations are associated with 17 p allelic loss in grade II and grade III astrocytoma. Cancer Res 52:2987–2990
Donehower LA, Harvey M, Slagle BL, McArthur MJ, Montgomery CA, Butel JS, Bradley A (1992) Mice deficient for p53 are developmentally normal but susceptible to spontaneous tumors. Nature 356:215–221
Feinberg AP, Vogelstein B (1983) A technique for radiolabelling DNA restriction endonuclease fragments to high specific activity. Anal Biochem 132:6–13
Frankel RH, Bayona W, Koslow M, Newcomb EW (1992) p53 mutations in malignant gliomas: comparison of loss of heterozygosity with mutation frequency. Cancer Res 52:1427–1433
Hollstein M, Momand J, Finlay CA (1991) The p53 tumor suppressor gene. Nature 351:453–456
Hsu IC, Metcalf RA, Sun T, Welsh JA, Wang NJ, Harris CC (1991) Mutational hotspot in the p53 gene in human hepatocellular carcinomas. Nature 350:427–428
Innis MA, Myambo KB, Gelfand DH, Brow MAD (1988) DNA sequencing withThermus aquaticus DNA polymerase and direct sequencing of polymerase chain reaction-amplified DNA. Proc Natl Acad Sci USA 85:9436–9440
Kastan MB, Onyekwere O, Sidransky D, Vogelstein B, Craig RW (1991) Participation of p53 protein in the cellular response to DNA damage. Cancer Res 51:6304–6311
Keles GE, Berger MS, Lim R, Zaheer A, Denton A, Silber JR (1992) Expression of glial fibrillary acidic protein in human medulloblastoma cells treated with recombinant glial maturation factor-β. Oncol Res 4:431–437
Levine AJ (1993) The p53 tumor suppressor gene and product. Biol Chem Hoppe Seyler 374:227–235
Levine AJ, Momand J, Finlay CA (1991) The p53 tumor suppressor gene. Nature 351:453–456
Loeb LA (1991) Mutator phenotype may be required for multistage carcinogenesis. Cancer Res 51:3075–3079
Lowe S, Schmitt EM, Smith SW, Osborne BA, Jacks T (1993) p53 is required for radiation-induced apoptosis in mouse thymocytes. Nature 363:847–849
Maltzman W, Czyzyk L (1984) UV irradiation stimulates levels of p53 cellular tumor antigen in non-transformed mouse cells. Mol Cell Biol 4:1689–1694
Nakamura Y, Lathrop M, O'Connel P, Leppert M, Barker D, et al (1988) A mapped set of DNA markers for human chromosome 17. Genomics 2:302–309
Nigro JM, Baker SJ, Preisinger AC, Jessup JM, Hostetter R, Cleary K, et al (1989) Mutations in the p53 gene occur in diverse human tumor types. Nature 342:704–707
Ohgaki H, Eibl RH, Wiestler OD, Yasargil MG, Newcomb EW, Kleihues P (1991) p53 mutations in nonastrocytic human brain tumors. Cancer Res 51:6202–6205
Oliner JD, Kinzler KW, Meltzer PS, George DL, Vogelstein B (1992) Amplication of a gene encoding a p53-associated protein in human sarcomas. Nature 358:80–83
Prives C (1993) Doing the right thing: feedback control and p53. Curr Opin Cell Biol 5:214–218
Prives C, Manfredi JJ (1993) The p53 tumor suppressor protein: meeting review. Genes Dev 7:529–534
Reifenberger G, Liu L, Ichimura K, Schmidt EE, Collins VP (1993) Amplication and overexpression of the MDM2 gene in a subset of human malignant gliomas without p53 mutations. Cancer Res 53:2736–2739
Sambrook J, Fritsch EF, Maniatis T (1989) Molecular cloning: a laboratory manual, 2nd edn. Cold Spring Harbor Laboratory, Cold Spring Harbor, NY
Sidransky D, Mikkelsen T, Schwechheimer K, Rosenblum ML, Cavenee W, Vogelstein B (1992) Clonal expansion of p53 mutant cells is associated with brain tumor progression. Nature 355:846–847
Silber JR, Bobola MS, Ewers TG, Muramoto M, Berger MS (1992) O6-alkylguanine-DNA alkyltransferase is not a major determinant of sensitivity to 1,3-bis(2-chloroethyl)-1-nitrosourea in four medulloblastoma cell lines. Oncol Res 4:241–248
Srivastava S, Zou Z, Pirollo K, Blattner W, Chang EH (1990) Germ-line transmission of a mutated p53 gene in a cancer-prone family with Li-Fraumeni syndrome. Nature 348:747–749
Wu JK, Zhen Y, Darras BT (1993) Frequency of p53 tumor suppressor gene mutations in human primary brain tumors. Neurosurgery 33:824–831
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Srinivasan, J., Berger, M.S. & Silber, J.R. p53 Expression in four human medulloblastoma-derived cell lines. Child's Nerv Syst 12, 76–80 (1996). https://doi.org/10.1007/BF00819500
Received:
Revised:
Issue Date:
DOI: https://doi.org/10.1007/BF00819500