Role of c-MYC, BCL2, and BCL6 Expression in Pathogenesis of Diffuse Large B-Cell Lymphoma

A.E. Misyurina1, V.A. Misyurin2, E.A. Baryakh1, A.M. Kovrigina1, S.K. Kravchenko1

1 Hematology Research Center under the Ministry of Health of the Russian Federation, 4а Novyi Zykovskii pr-d, Moscow, Russian Federation, 125167

2 N.N. Blokhin Russian Cancer Research Center, 24 Kashirskoye sh., Moscow, Russian Federation, 115478

For correspondence: A.E. Misyurina, Graduate student 4а Novyi Zykovskii pr-d, Moscow, Russian Federation, 125167; Tel: +7(909)637-32-49; e-mail: anna.lukina1@gmail.com

For citation: Misyurina A.E., Misyurin V.A., Baryakh E.A., Kovrigina A.M., Kravchenko S.K. Role of c-MYC, BCL2, and BCL6 Expression in Pathogenesis of Diffuse Large B-Cell Lymphoma. Klin. Onkogematol. 2014; 7(4): 512–521 (In Russ.).


ABSTRACT

According to modern concepts based on results of examination of the gene expression profile, there are several subtypes of diffuse large B cell lymphoma (DLBCL): germinal center B cell-like (GCB) and activated B cell-like (ABC) lymphomas. Genes c-MYC, BCL6, and BCL2 are key regulators of B-cell germinal (follicular) differentiation. Genetic abnormalities with their participation are most common in molecular pathogenesis of DLBCL. A total level of activity as well as mechanisms that lead to overexpression each of these genes and production of corresponding proteins have an impact on a disease prognosis. We assume that quantitative assay of c-MYC, BCL6, and BCL2 gene expression, as well as proteins encoded by these genes, can allow to determine high risk DLBCL patients with great accuracy.


Keywords: diffuse large B cell lymphoma, molecular subtypes, risk groups, c-MYC, BCL6, BCL2.

Accepted: September 8, 2014

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Importance of biochemical studies of brain natriuretic peptide in patients with diffuse large B-cell lymphoma

M.O. Yegorova, Ye.N. Komolova, and S.Ye. Samsonova

Hematology Research Center, RF Ministry of Health, Moscow, Russian Federation


ABSTRACT

In this study, we measured the levels of the brain natriuretic peptide (BNP) in the blood of patients with diffuse large B-cell lymphoma (DBCL) before and after polychemotherapy. The study included 10 patients: 6 males and 4 females at the age of 39 to 63 (mean age = 51 ± 12). The control group consisted of 20 virtually healthy donors. It was shown that measurements of BNP plasma levels in DBCL could identify the patients with the high risk of heart failure. Screening tests with determination of BNP levels can influence the choice of chemotherapy for DBCL.


Keywords: diffuse large B-cell lymphoma, chemotherapy, BNP, myocardial infarction, congestive left ventricular heart failure.

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Radiotherapy in combined treatment of patients with diffuse large B-cell lymphoma

Yu.N. Vinogradova, N.V. Ilin, D.V. Larionov, M.M. Khodzhibekova, N.A. Kostenikov, and L.I. Korytova

Russian Research Centre for Radiology and Surgical Technologies, RF Ministry of Health, Saint Petersburg, Russian Federation


ABSTRACT

The study included 86 primary patients (age: 18–83) with diffuse large B-cell lymphoma, I to IV stages, who received (R)-CHOP regimen and radiotherapy at the CRIRR (at present RRCRST) over the period 2000–2012. The follow-up period median was 42 months (5–120 months). Positron emission tomography (PET) with 18F-FDG was performed in 45 patients at the various follow-up time-points. In all patients, the changes of hematologic indices were observed using baseline, pre-, and postradiation measurements. After combined treatment completed, remission was achieved in 80 out of 86 (93.0 %) patients, including complete or uncertain complete remission and partial remission in 86.0 % and 7.0 %, respectively. During the initial therapy, disease progression occurred in 6 (7.0 %) patients. After the chemotherapy stage, complete remission was noted in 56 (65.1 %) patients only. Additional radiotherapy promoted the increase in the rate of complete and uncertain complete response by 21.9 %. Disseminated disease relapses developed in 2 out of 80 (2.5 %) patients. The complete response rate in the patients who received radiotherapy using the various fractionation regimens was similar. 5-year overall, relapse-free, and progressionfree survival were 89.7 ± 3.9 %, 96.6 ± 2.4 %, and 85.4 ± 4.8 %, respectively. In 20.6 % of the patients examined after chemotherapy, PET gave positive results, while after the radiotherapy stage, all the patients examined at this time-point were PET-negative. Radiotherapy was accompanied by mainly I–II grade hematologic toxicity, and in 16–58 % of patients, no interruption of treatment were required. Neutropenia and thrombocytopenia occurred more frequently at the twice-a-day irradiation.


Keywords: diffuse large B-cell lymphoma, radiotherapy, positron emission tomography, hematologic toxicity.

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