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Molecular Characterization of a t(11;14)(q23;q32) Chromosome Translocation in a B-Cell Lymphoma¹

The Fels Institute for Cancer Research and Molecular Biology, Temple University School of Medicine, Philadelphia, Pennsylvania 19140 [Y. A., C. M. C.]; The Wistar Institute of Anatomy and Biology, Philadelphia, Pennsylvania 19104 [Y. T.]; and Department of Pathology and Laboratory Medicine, University of Pennsylvania School of Medicine, Philadelphia, Pennsylvania 19104 [J. F., P. C. N.]

We have analyzed the molecular features of a t(11;14)(q23;q32) chromosome translocation of a cell line established from a B-cell lymphoma.

Somatic hybrid cells carrying the 11q- and/or 14q+ chromosome(s) were produced in order to map the breakpoints. Southern blot analyses of DNAs from these hybrid cell lines together with various probes from the IGH locus on chromosome 14 and the ETS-1 and CD3 genes on chromosome 11 showed that the breakpoints of the translocation occurred between the constant regions of the C and C₂ genes on chromosome 14 and between the CD3 and ETS-1 genes on chromosome 11. The t(11;14)(q23;q32) translocation does not seem to involve the same mechanism that is responsible for translocations occurring at the immunoglobulin heavy chain joining segment (J_H).

¹ This work was supported by NIH Grants CA 25875 (to Y. T.), CA 42232 (to P. C. N.), and CA 39860, American Cancer Society Grant CH378, and a W. W. Smith Charitable Trust (to C. M. C.).

² To whom requests for reprints should be addressed, at c/o Ryuzo Ueda, M.D., Aichi Cancer Center Research Institute, Laboratory of Chemotherapy, Chikusa-ku, Nagoya 464, Japan.

Received 2/19/90. Revised 5/ 2/90.

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