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Hypersomy of chromosome 15 with retrovirally rearranged c-myc, loss of germline c-myc and IgK/c-myc juxtaposition in a macrophage-monocytic tumour line

In English

Författare

  • S Imreh
  • Y Wang
  • C K Panda
  • M Babonits
  • H Axelson
  • S Silva
  • A Szeles
  • F Wiener
  • G Klein

Summary, in English

From a lymphoid tumour induced by 7,12-dimethylbenz-[a]-anthracene (DMBA) + methyl-N-nitrose-N-urea (MNU) in an [AKR Rb(6.15) x CBAT6T6]F1 mouse, a macrophage- monocyte line (KT-10) was isolated. Following ethyl methanesulfonate (EMS) treatment, a bromodeoxyuridine (BUdR) resistant subline was selected. Serial propagation of this line in vitro in the presence of BUdR (28 months) with periodic cytogenetic and molecular examinations, has led to the definition of four successive stages. During stage I, the cells were trisomic for chromosome 15. They contained Rb(6.15) and Rb(del6.15) of AKR and T(14;15) of CBA origin. Southern blotting showed the presence of both germline (G) and rearranged (R) c-myc. At stage II, Rb(del6.15) has duplicated. Both Rb(6.15) and T(14;15) persisted together with G-myc and R-myc. In stage III, the CBA-derived T(14;15) was lost, in parallel with G-myc. At this stage, a Dic.In(6.15) was detected. One of its arms was cytogenetically identical with the long arm of In(6.15) in the variant IgK/myc translocations. This chromosome carried R-myc and IgK in juxtaposition, as indicated by comigration on pulsed field electrophoresis (PFGE). At stage IV, the R-myc carrying AKR-derived chromosome 15s were present in six copies. Possible relationships between the increasing R/G myc ratio and changed growth characteristics in vivo and in vitro are discussed.

Publiceringsår

1994

Språk

Engelska

Sidor

994-1002

Publikation/Tidskrift/Serie

European Journal of Cancer

Volym

30A

Issue

7

Dokumenttyp

Artikel i tidskrift

Förlag

Elsevier

Nyckelord

  • 9,10-Dimethyl-1,2-benzanthracene
  • Animals
  • Blotting, Northern
  • Blotting, Southern
  • Chromosome Aberrations
  • Chromosomes, Human, Pair 15
  • Electrophoresis, Gel, Pulsed-Field
  • Genes, myc
  • Humans
  • Lymphoma, T-Cell
  • Macrophages
  • Methylnitrosourea
  • Mice
  • Mice, Inbred AKR
  • Mice, Inbred BALB C
  • Monocytes
  • Trisomy
  • Tumor Cells, Cultured

Status

Published

ISBN/ISSN/Övrigt

  • ISSN: 0959-8049