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Updated: Oct 5, 2026

Immunoglobulin Gene Sequence Analysis In Chronic Lymphocytic Leukemia: From Patient Material To Sequence Interpretation
Published on: November 26, 2018
Translocation (2;14) associated with complex rearrangements of the Ig heavy chain in non-Hodgkin lymphoma
L C Walker1, M J Morrison, R Parfitt
1Leukaemia Research Group, Christchurch School of Medicine, Christchurch, New Zealand. logan.walker@chmeds.ac.nz
Abstract:
Cytogenetic analysis of a patient with non-Hodgkin lymphoma revealed the following karyotype: 49,XXX,t(2;14)(q21;q32),+4,+8,del(13)(q14q21). Southern blot analysis with an Ig region probe showed non-productive rearrangements indicative of a translocation involving the Ig locus. However, molecular cloning of the abnormal rearrangements did not show novel sequences derived from chromosome 2 but showed that the BCL-6 gene was juxtaposed to the IgH enhancer. Three further clones with abnormal rearrangements involving the Ig locus, particularly Iggamma3, were isolated. This suggests that the mature lymphoid cells, in this patient, were capable of undergoing indiscriminate switch cleavage and religation.
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