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Comprehensive molecular cytogenetic investigation of chromosomal abnormalities in human medulloblastoma cell lines and xenograft.

Publication ,  Journal Article
Aldosari, N; Wiltshire, RN; Dutra, A; Schrock, E; McLendon, RE; Friedman, HS; Bigner, DD; Bigner, SH
Published in: Neuro Oncol
April 2002

Cell lines and xenografts derived from medulloblastomas are useful tools to investigate the chromosomal changes in these tumors. Here we used G-banding, fluorescence in situ hybridization (FISH), spectral karyotyping (SKY), and comparative genomic hybridization to study 4 medulloblastoma cell lines and 1 xenograft. Cell line D-425 Med had a relatively simple karyotype, with a terminal deletion of 10q and amplification of MYC in double-minutes (dmins). FISH demonstrated that an apparent isochromosome (17q) by routine karyotyping was actually an unbalanced translocation between 2 copies of chromosome 17. Cell line D-556 Med also had a simple near-diploid stemline with an unbalanced 1;13 translocation resulting in a gain of 1q, an isochromosome (17q), and dmins. These findings were initially described using routine G-banded preparations, and FISH showed that the dmins were an amplification of MYC and the i(17q) was an isodicentric 17q chromosome. The other finding was confirmed by FISH, SKY, and comparative genomic hybridization. Cell lines D-721 Med and D-581 Med had complex karyotypic patterns that could be completely characterized only when FISH and SKY were used. Xenograft D-690 Med also had a complex pattern that FISH and SKY were helpful in completely elucidating. Interestingly, balanced reciprocal translocations were seen as well as complicated unbalanced translocations and marker chromosomes. Comparative genomic hybridization demonstrated only a deletion of 10q22-10q24, supporting the idea that despite the complexity of the chromosomal rearrangements, minimal alterations in the overall chromosomal content had occurred. This study demonstrates that routine cytogenetic preparations are adequate to describe chromosomal abnormalities in occasional medulloblastoma samples, but a broader spectrum of molecular cytogenetic methods is required to completely analyze most of these tumor samples.

Duke Scholars

Published In

Neuro Oncol

DOI

ISSN

1522-8517

Publication Date

April 2002

Volume

4

Issue

2

Start / End Page

75 / 85

Location

England

Related Subject Headings

  • Tumor Cells, Cultured
  • Transplantation, Heterologous
  • Oncology & Carcinogenesis
  • Nucleic Acid Hybridization
  • Medulloblastoma
  • Male
  • Karyotyping
  • In Situ Hybridization, Fluorescence
  • Humans
  • Female
 

Citation

APA
Chicago
ICMJE
MLA
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Aldosari, N., Wiltshire, R. N., Dutra, A., Schrock, E., McLendon, R. E., Friedman, H. S., … Bigner, S. H. (2002). Comprehensive molecular cytogenetic investigation of chromosomal abnormalities in human medulloblastoma cell lines and xenograft. Neuro Oncol, 4(2), 75–85. https://doi.org/10.1093/neuonc/4.2.75
Aldosari, Naji, Rodney N. Wiltshire, Amalia Dutra, Evelin Schrock, Roger E. McLendon, Henry S. Friedman, Darell D. Bigner, and Sandra H. Bigner. “Comprehensive molecular cytogenetic investigation of chromosomal abnormalities in human medulloblastoma cell lines and xenograft.Neuro Oncol 4, no. 2 (April 2002): 75–85. https://doi.org/10.1093/neuonc/4.2.75.
Aldosari N, Wiltshire RN, Dutra A, Schrock E, McLendon RE, Friedman HS, et al. Comprehensive molecular cytogenetic investigation of chromosomal abnormalities in human medulloblastoma cell lines and xenograft. Neuro Oncol. 2002 Apr;4(2):75–85.
Aldosari, Naji, et al. “Comprehensive molecular cytogenetic investigation of chromosomal abnormalities in human medulloblastoma cell lines and xenograft.Neuro Oncol, vol. 4, no. 2, Apr. 2002, pp. 75–85. Pubmed, doi:10.1093/neuonc/4.2.75.
Aldosari N, Wiltshire RN, Dutra A, Schrock E, McLendon RE, Friedman HS, Bigner DD, Bigner SH. Comprehensive molecular cytogenetic investigation of chromosomal abnormalities in human medulloblastoma cell lines and xenograft. Neuro Oncol. 2002 Apr;4(2):75–85.
Journal cover image

Published In

Neuro Oncol

DOI

ISSN

1522-8517

Publication Date

April 2002

Volume

4

Issue

2

Start / End Page

75 / 85

Location

England

Related Subject Headings

  • Tumor Cells, Cultured
  • Transplantation, Heterologous
  • Oncology & Carcinogenesis
  • Nucleic Acid Hybridization
  • Medulloblastoma
  • Male
  • Karyotyping
  • In Situ Hybridization, Fluorescence
  • Humans
  • Female