title: Biological and clinical characteristics of patients with chronic lymphocytic leukemia with the IGHV3-21 and IGHV1-69; analysis of data from a single center.
abstract: This study aimed at mapping the frequency of IGHV3-21 and IGHV1-69 in a group of 417 patients newly diagnosed with chronic lymphocytic leukemia (CLL) and described basic characteristics, cytogenetic abnormalities and prognosis of these patient subgroups. IGHV3-21 was found in 29 patients (7%) and IGHV1-69 in 51 patients (12.4%). The median overall survival (OS) rates were 97 months and 85 months in the IGHV3-21 and IGHV1-69 groups, respectively. In this small group of patients, the study failed to show a difference in OS of IGHV3-21 patients with mutated and unmutated IGHV status (p<0.597). There was also no difference in OS between IGHV3-21 patients with mutated IGHV status and all patients in the group having unmutated IGHV status (p<0.245). On the other hand, patients with IGHV3-21 and the presence of some other adverse prognostic factors (age ≥ 65 years, lymphocyte count ≥ 50×109/L, serum thymidine kinase ≥ 9U/L, deletion of 17p) had statistically significantly worse OS than IGHV3-21 patients without the presence of these prognostic factors. The multivariate analysis of an entire group of Binet clinical stage A patients proved that the presence of IGHV3-21 is as an independent adverse prognostic factor even though there was no statistical difference in OS between patients with IGHV3-21 and those without IGHV3-21 in the entire group (p<0.769). Patients with IGHV1-69 had the same probablility of OS irrespective of the presence of other adverse prognostic factors; their OS was significantly shorter as compared with the other patients from the entire group (p<0.03).The study mapped the occurrence of recurrent cytogenetic changes detected by FISH in IGHV3-21 (subset #2 and non-subset #2) and IGHV1-69 and compared it with the occurrence of recurrent changes in the entire group of patients. In IGHV1-69 and in subset #2 IGHV3-21, higher proportions of deletion of 11q were found (30% and 31%, respectively), with the deletion being present in 19.2% of the entire group of patients. None of the 3 patients with IGHV3-21 and deletion of 17p had subset #2. Patients with subset #2 IGHV3-21 had higher proportions of deletion of 13 (69%) as compared with non-subset #2 IGHV3-21 patients (27%).
authors.forename: R
authors.initials: R
authors.lastname: Urbanova
authors.forename: L
authors.initials: L
authors.lastname: Humplikova
authors.forename: H
authors.initials: H
authors.lastname: Drimalova
authors.forename: V
authors.initials: V
authors.lastname: Prochazka
authors.forename: P
authors.initials: P
authors.lastname: Turcsanyi
authors.forename: Z
authors.initials: Z
authors.lastname: Pikalova
authors.forename: M
authors.initials: M
authors.lastname: Holzerova
authors.forename: L
authors.initials: L
authors.lastname: Kruzova
authors.forename: M
authors.initials: M
authors.lastname: Jarosova
authors.forename: J
authors.initials: J
authors.lastname: Urban
authors.forename: J
authors.initials: J
authors.lastname: Vrbkova
authors.forename: K
authors.initials: K
authors.lastname: Indrak
authors.forename: T
authors.initials: T
authors.lastname: Papajik
keywords: IGHV mutation status; IGHV1-69; IGHV3-21; chronic lymphocytic leukemia; stereotyped B-cell receptor; subset #2.