Abstract
Current methods for the detection of IgVH mutational status in chronic lymphocytic leukemia (CLL), which identifies 2 subgroups of patients with significantly different outcomes, are laborious, expensive and do not lend themselves to a routine diagnostic setting. With the introduction of BIOMED-2 primers, a rapid protocol is now available. This study evaluated the protocol by examining DNA from 100 CLL patients. Conventional methods using RNA, and fluorescence in-situ hybridization (FISH) analysis for recurring chromosomal abnormalities, were carried out on 30 and 60 of these patients, respectively. There was complete concordance between the BIOMED-2 protocol and the RNA based method, both in mutational status and gene usage, whilst unmutated IgVH genes showed association with 17p13 and 11q23 deletions, and trisomy 12, associated with poor and intermediate outcomes, respectively. This study demonstrates that it is feasible to use the BIOMED-2 protocol in the diagnostic profile of CLL patients, obviating the need for inclusion of surrogate markers such as ZAP-70.
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