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CD69 is a good surrogate marker for IgVH gene mutation status in Swedish chronic lymphocytic leukemia (CLL) patients.

Journal article
Authors Sofia Grund
Bob Olsson
Margareta Jernås
Stefan Jacobsson
Published in Acta Haematologica Polonica
Volume 41
Issue 1
Pages 53-61
Publication year 2010
Published at Institute of Biomedicine, Department of Clinical Chemistry and Transfusion Medicine
Institute of Neuroscience and Physiology, Department of Psychiatry and Neurochemistry
Institute of Medicine
Pages 53-61
Language en
Keywords gene mutation, CD69
Subject categories Dermatology and Venereal Diseases

Abstract

Chronic lymphocytic leukemia (CLL) patients with unmutated IgVH genes have poorer survival than patients with mutated IgVH genes. However, mutation analysis is not always available in the routine laboratory and therefore surrogate markers are needed. CD69 has in two previous studies been shown to be a marker for mutation status. Our aim was therefore to investigate if CD69 expression was a better marker for mutation status than ZAP-70 and CD38 in a sample of patients from the west of Sweden. We analyzed the expression of CD69 in CD19+ B cells from CLL patients and controls using flow cytometry. CD69 was higher expressed in B cells from CLL patients compared with controls (35±31% and 2.6±1.8% CD19+/CD69+ cells respectively, P=0.0010). Patients with unmutated IgVH genes had a higher percentage of CD19+/CD69+ cells compared with patients with mutated IgVH genes (70±24% vs. 18±12%, P=0.00076). Furthermore, there was a strong concordance, even better than for CD38 and ZAP-70, between expression of CD69 and IgVH mutation status (96%, P<0.0001). Thus, our data in combination with those from others indicate that CD69 may be an excellent surrogate marker for IgVH mutation status and ultimately survival. Furthermore, this analysis is well suited for routine analysis.

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