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Deletional remodeling of c-myc-deregulating chromosomal translocations

Oncogene volume 15, pages 2369–2377 (1997)Cite this article

Abstract

Evidence is presented for the existence of a novel remodeling-by-deletion mechanism that alters the fine structure of c-myc-deregulating chromosomal translocations in t(12;15)-positive BALB/c plasmacytomas. DNA sequence analysis of the t(12;15) in five primary tumors revealed the co-existence of precursor cells harboring genetic recombinations between the immunoglobulin heavy-chain μ locus (Ighμ) and c-myc with clonally related progenitors containing rearrangements between the immunoglobulin heavy-chain α locus (Ighα) and c-myc. Clonal relatedness was based upon unique junction fragments between the switch region of Ighμ and c-myc. Sμ/c-myc junctions are thus useful clonotypic markers for monitoring the conversion of Ighμ/c-myc-positive tumor precursor clones into Ighα/c-myc-positive plasmacytomas. Aberrant isotype switch recombination appears to be the most likely mechanism effecting this conversion event (other possibilities are discussed) which may help to explain the preferred usage of the Ighα locus in recombinations with c-myc in t(12;15)-positive plasma cell tumors in BALB/c mice.

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  1. Division of Basic Sciences, Laboratory of Genetics, National Cancer Institute, National Institutes of Health, Bethesda, 20892-4255, Maryland, USA

    Alexander L Kovalchuk, Jürgen R Müller & Siegfried Janz

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  1. Alexander L Kovalchuk
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  2. Jürgen R Müller
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  3. Siegfried Janz
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Kovalchuk, A., Müller, J. & Janz, S. Deletional remodeling of c-myc-deregulating chromosomal translocations. Oncogene 15, 2369–2377 (1997). https://doi.org/10.1038/sj.onc.1201409

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  • DOI: https://doi.org/10.1038/sj.onc.1201409

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