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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Break in the BCL1 locus is closely associated with intermediate lymphocytic lymphoma subtype.

The t(11;14)(q13;q32) is a recurring translocation associated with some chronic B-cell lymphocytic malignancies; the putative protooncogene BCL1, located at the chromosome band 11q13, can be involved during the translocation process. In order to determine if BCL1 rearrangement is associated with a particular subtype of lymphoma, we analysed 131 B-cell non-Hodgkin's lymphoma samples by Southern blot analysis, using a BCL1 probe. The BCL1 locus was rearranged in 9 out of 25 (36%) cases of intermediate lymphocytic cell lymphomas (ILL), in 1 out of 8 cases of diffuse small cleaved cell lymphoma, in 1 out of 12 cases of diffuse mixed cell lymphoma, and in 1 out of 21 cases of diffuse large cell lymphoma. In contrast, BCL1 was never found rearranged in any of the 46 follicular lymphomas analysed. The BCL2 gene was in germ-line configuration in all ILL. Sequential hybridization of Southern blots with JH, C mu, and BCLI probes identified comigrating fragments in only one case of ILL, which suggests that, in all the other cases, either the rearrangement of BCL1 did not result from a t(11;14) translocation or the break on chromosome 14 occurred outside the JH or C mu regions. These results indicate that rearrangement of the BCL1 locus may be closely associated with ILL and could be considered as a genotypic marker of this lymphoma subtype.[1]


  1. Break in the BCL1 locus is closely associated with intermediate lymphocytic lymphoma subtype. Rimokh, R., Berger, F., Cornillet, P., Wahbi, K., Rouault, J.P., Ffrench, M., Bryon, P.A., Gadoux, M., Gentilhomme, O., Germain, D. Genes Chromosomes Cancer (1990) [Pubmed]
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