Journal
BLOOD
Volume 132, Issue 20, Pages 2179-2182Publisher
AMER SOC HEMATOLOGY
DOI: 10.1182/blood-2018-04-845115
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Funding
- National Institutes of Health, National Cancer Institute of the CLL Research Consortium [P01 CA81534]
- National Institutes of Health, National Cancer Institute [R35 CA197706]
- NATIONAL CANCER INSTITUTE [P01CA081534, R01CA201184, P30CA016058, R35CA197706] Funding Source: NIH RePORTER
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Chronic lymphocytic leukemia (CLL) is the most common adult leukemia. It is characterized by the accumulation of CD19(+)/CD5(+) lymphocytes and can have variable outcomes. Richter syndrome (RS) is a lethal complication in CLL patients that results in aggressive B-cell lymphomas, and there are no tests to predict its occurrence. Because alterations in microRNA expression can predict the development and progression of several cancers, we investigated whether dysregulation of specific microRNAs can predict RS in CLL patients. Thus, we compared microRNA expression levels in samples from 49 CLL patients who later developed RS with samples from 59 CLL patients who did not. We found that high expression of miR-125a-5p or low expression of miR-34a-5p can predict similar to 50% of RS with a false positive rate of similar to 9%. We found that CLL patients predicted to develop RS show either an increase of miR-125a-5p expression (similar to 20-fold) or a decrease of miR-34a-5p expression (similar to 21-fold) compared with CLL patients that are not predicted to develop RS. Thus, miR-125a-5p and miR-34a-5p can be valuable predictor markers of RS and have the potential to provide physicians with information that can indicate the best therapeutic strategy for CLL patients.
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