Gene amplification in PNETs/medulloblastomas: Mapping of a novel amplified gene within the MYCN amplicon

Michael C. Frühwald, Garrett M. Brodeur, Christoph Plass, M. Sue O'Dorisio, Laura J. Rush, Jill Reiter, Dominic J. Smiraglia, Gail Wenger, Joseph F. Costello, Peter S. White, Ralf Krahe

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

Objectives. The pathological entity of primitive neuroectodermal tumour/medulloblastoma (PNET/MB) comprises a very heterogeneous group of neoplasms on a clinical as well as on a molecular level. We evaluated the importance of DNA amplification in medulloblastomas and other primitive neuroectodermal tumours (PNETs) of the CNS. Method. Restriction landmark genomic scanning (RLGS), a method that allows the detection of low level amplification, was used. RLGS provides direct access to DNA sequences circumventing positional cloning efforts. Furthermore, we analysed several samples by CGH. Design. Twenty primary medulloblastomas, five supratentorial PNETs, and five medulloblastoma cell lines were studied. Results. Although our analysis confirms that gene amplification is generally a rare event in childhood PNET/MB, we found a total of 17 DNA fragments that were amplified in seven different tumours. Cloning and sequencing of several of these fragments confirmed the previous finding of MYC amplification in the cell line D341 Med and identified novel DNA sequences amplified in PNET/MB. We describe for the first time amplification of the novel gene, NAG, in a subset of PNET/MB. Despite genomic amplification, NAG was not overexpressed in the tumours studied. We have determined that NAG maps less than 50 kb 5' of DDX1 and approximately 400 kb telomeric of MYCN on chromosome 2p24. Conclusion. We found a similar but slightly higher frequency of amplification than previously reported. We present several DNA fragments that may belong to the CpG islands of novel genes amplified in a small subset of PNET/MB. As an example we describe for the first time the amplification of NAG in the MYCN amplicon in PNET/MB.

Original languageEnglish (US)
Pages (from-to)501-509
Number of pages9
JournalJournal of Medical Genetics
Volume37
Issue number7
StatePublished - 2000
Externally publishedYes

Fingerprint

Primitive Neuroectodermal Tumors
Medulloblastoma
Gene Amplification
Genes
Organism Cloning
DNA
Cell Line
Neoplasms
CpG Islands
Chromosomes

Keywords

  • Medulloblastoma
  • NAG amplification
  • PNET
  • RLGS

ASJC Scopus subject areas

  • Genetics
  • Genetics(clinical)

Cite this

Frühwald, M. C., Brodeur, G. M., Plass, C., O'Dorisio, M. S., Rush, L. J., Reiter, J., ... Krahe, R. (2000). Gene amplification in PNETs/medulloblastomas: Mapping of a novel amplified gene within the MYCN amplicon. Journal of Medical Genetics, 37(7), 501-509.

Gene amplification in PNETs/medulloblastomas : Mapping of a novel amplified gene within the MYCN amplicon. / Frühwald, Michael C.; Brodeur, Garrett M.; Plass, Christoph; O'Dorisio, M. Sue; Rush, Laura J.; Reiter, Jill; Smiraglia, Dominic J.; Wenger, Gail; Costello, Joseph F.; White, Peter S.; Krahe, Ralf.

In: Journal of Medical Genetics, Vol. 37, No. 7, 2000, p. 501-509.

Research output: Contribution to journalArticle

Frühwald, MC, Brodeur, GM, Plass, C, O'Dorisio, MS, Rush, LJ, Reiter, J, Smiraglia, DJ, Wenger, G, Costello, JF, White, PS & Krahe, R 2000, 'Gene amplification in PNETs/medulloblastomas: Mapping of a novel amplified gene within the MYCN amplicon', Journal of Medical Genetics, vol. 37, no. 7, pp. 501-509.
Frühwald, Michael C. ; Brodeur, Garrett M. ; Plass, Christoph ; O'Dorisio, M. Sue ; Rush, Laura J. ; Reiter, Jill ; Smiraglia, Dominic J. ; Wenger, Gail ; Costello, Joseph F. ; White, Peter S. ; Krahe, Ralf. / Gene amplification in PNETs/medulloblastomas : Mapping of a novel amplified gene within the MYCN amplicon. In: Journal of Medical Genetics. 2000 ; Vol. 37, No. 7. pp. 501-509.
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AU - Brodeur, Garrett M.

AU - Plass, Christoph

AU - O'Dorisio, M. Sue

AU - Rush, Laura J.

AU - Reiter, Jill

AU - Smiraglia, Dominic J.

AU - Wenger, Gail

AU - Costello, Joseph F.

AU - White, Peter S.

AU - Krahe, Ralf

PY - 2000

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N2 - Objectives. The pathological entity of primitive neuroectodermal tumour/medulloblastoma (PNET/MB) comprises a very heterogeneous group of neoplasms on a clinical as well as on a molecular level. We evaluated the importance of DNA amplification in medulloblastomas and other primitive neuroectodermal tumours (PNETs) of the CNS. Method. Restriction landmark genomic scanning (RLGS), a method that allows the detection of low level amplification, was used. RLGS provides direct access to DNA sequences circumventing positional cloning efforts. Furthermore, we analysed several samples by CGH. Design. Twenty primary medulloblastomas, five supratentorial PNETs, and five medulloblastoma cell lines were studied. Results. Although our analysis confirms that gene amplification is generally a rare event in childhood PNET/MB, we found a total of 17 DNA fragments that were amplified in seven different tumours. Cloning and sequencing of several of these fragments confirmed the previous finding of MYC amplification in the cell line D341 Med and identified novel DNA sequences amplified in PNET/MB. We describe for the first time amplification of the novel gene, NAG, in a subset of PNET/MB. Despite genomic amplification, NAG was not overexpressed in the tumours studied. We have determined that NAG maps less than 50 kb 5' of DDX1 and approximately 400 kb telomeric of MYCN on chromosome 2p24. Conclusion. We found a similar but slightly higher frequency of amplification than previously reported. We present several DNA fragments that may belong to the CpG islands of novel genes amplified in a small subset of PNET/MB. As an example we describe for the first time the amplification of NAG in the MYCN amplicon in PNET/MB.

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