Biological and clinical characteristics of patients with chronic lymphocytic leukemia with the IGHV3-21 and IGHV1-69; analysis of data from a single center

Rok, strany: 2015, 618 - 626

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%). Keywords: chronic lymphocytic leukemia, IGHV mutation status, IGHV3-21, IGHV1-69, stereotyped B-cell receptor, subset #2

ISO 690:

Urbanova, R., Humplikova, L., Drimalova, H., Prochazka, V., Turcsanyi, P., Pikalova, Z., Holzerova, M., Kruzova, L., Jarosova, M., Urban, J., Vrbkova, J., Indrak, K., Papajik, T. 2015. Biological and clinical characteristics of patients with chronic lymphocytic leukemia with the IGHV3-21 and IGHV1-69; analysis of data from a single center. In NEOPLASMA, vol. 62, no.4, pp. 618-626. 0028-2685.

APA:

Urbanova, R., Humplikova, L., Drimalova, H., Prochazka, V., Turcsanyi, P., Pikalova, Z., Holzerova, M., Kruzova, L., Jarosova, M., Urban, J., Vrbkova, J., Indrak, K., Papajik, T. (2015). Biological and clinical characteristics of patients with chronic lymphocytic leukemia with the IGHV3-21 and IGHV1-69; analysis of data from a single center. NEOPLASMA, 62(4), 618-626. 0028-2685.