Belarusian Research Center for Pediatric Oncology

Minsk, Belarus

Belarusian Research Center for Pediatric Oncology

Minsk, Belarus
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Borisevich M.V.,Belarusian Research Center for Pediatric Oncology
Pediatric Hematology/Oncology and Immunopathology | Year: 2016

Chronic myeloid leukemia (CML) is rare in children up to the age of 18 years; for this reason, there are no accurate criteria of monitoring and individualization of treatment in this population group. This review of literature presents some features of the manifestation, the development of CML, the tyrosine kinase inhibitors treatment response and results of allogeneic stem cell transplantation in children. In addition this paper presents published data on the incidence of side effects during long-term imatinib therapy.

PubMed | University of Padua, University Childrens Hospital, Semmelweis University, Hospital for Sick Children and 15 more.
Type: Journal Article | Journal: Annals of hematology | Year: 2016

Peripheral T cell lymphomas (PTCL) are rare in children and adolescents, and data about outcome and treatment results are scarce. The present study is a joint, international, retrospective analysis of 143 reported cases of non-anaplastic PTCL in patients <19years of age, with a focus on treatment and outcome features. One hundred forty-three patients, between 0.3 and 18.7years old, diagnosed between 2000 and 2015 were included in the study. PTCL not otherwise specified was the largest subgroup, followed by extranodal NK/T cell lymphoma, hepatosplenic T cell lymphoma (HS TCL), and subcutaneous panniculitis-like T cell lymphoma (SP TCL). Probability of overall survival (pOS) at 5years for the whole group was 0.560.05, and probability of event-free survival was (pEFS) 0.450.05. Patients with SP TCL had a good outcome with 5-year pOS of 0.780.1 while patients with HS TCL were reported with 5-year pOS of only 0.130.12. Twenty-five percent of the patients were reported to have a pre-existing condition, and this group had a dismal outcome with 5-year pOS of 0.290.09. The distribution of non-anaplastic PTCL subtypes in pediatric and adolescent patients differs from what is reported in adult patients. Overall outcome depends on the subtype with some doing better than others. Pre-existing conditions are frequent and associated with poor outcomes. There is a clear need for subtype-based treatment recommendations for children and adolescents with PTCL.

PubMed | Hospital for Sick, Semmelweis University, University of Zürich, Justus Liebig University and 19 more.
Type: Journal Article | Journal: Haematologica | Year: 2016

Children and adolescents with pre-existing conditions such as DNA repair defects or other primary immunodeficiencies have an increased risk of non-Hodgkin lymphoma. However, large-scale data on patients with non-Hodgkin lymphoma and their entire spectrum of pre-existing conditions are scarce. A retrospective multinational study was conducted by means of questionnaires sent out to the national study groups or centers, by the two largest consortia in childhood non-Hodgkin lymphoma, the European Intergroup for Childhood non-Hodgkin Lymphoma, and the international Berlin-Frankfurt-Mnster Study Group. The study identified 213 patients with non-Hodgkin lymphoma and a pre-existing condition. Four subcategories were established: a) cancer predisposition syndromes (n=124, 58%); b) primary immunodeficiencies not further specified (n=27, 13%); c) genetic diseases with no increased cancer risk (n=40, 19%); and d) non-classifiable conditions (n=22, 10%). Seventy-nine of 124 (64%) cancer predispositions were reported in groups with more than 20 patients: ataxia telangiectasia (n=32), Nijmegen breakage syndrome (n=26), constitutional mismatch repair deficiency (n=21). For the 151 patients with a known cancer risk, 5-year event-free survival and overall survival rates were 40%4% and 51%4%, respectively. Five-year cumulative incidences of progression/relapse and treatment-related death as a first event were 22%4% and 24%4%, respectively. Ten-year incidence of second malignancy was 24%5% and 7-year overall survival of the 21 patients with a second malignancy was 41%11%. Patients with non-Hodgkin lymphoma and pre-existing conditions have an inferior survival rate with a large proportion of therapy-related deaths compared to patients with non-Hodgkin lymphoma and no pre-existing conditions. They may require special vigilance when receiving standard or modified/reduced-intensity chemotherapy or when undergoing allogeneic stem cell transplantation.

PubMed | National Oncology Hospital, Hygeia Hospital, Oncological Institute Ion Chiricuta, Institute of Oncology and 15 more.
Type: | Journal: Journal of neuro-oncology | Year: 2016

Pilocytic astrocytomas (PA) comprise the most common childhood central nervous system (CNS) tumor. Exploiting registry-based data from Southern and Eastern Europe (SEE) and SEER, US, we opted to examine incidence, time trends, survival and tentative outcome disparities of childhood PA by sociodemographic and clinical features. Childhood PA were retrieved from 12 SEE registries (N=552; 1983-2014) and SEER (N=2723; 1973-2012). Age-standardized incidence rates (ASR) were estimated and survival was examined via Kaplan-Meier and Cox regression analysis. ASR of childhood PA during 1990-2012 in SEE was 4.2/10

PubMed | National Oncology Hospital, Institute of Public Health of Serbia, Oncological Institute Ion Chiricuta, Institute of Oncology and 16 more.
Type: | Journal: European journal of cancer (Oxford, England : 1990) | Year: 2016

To assess trends in survival and geographic disparities among children (0-14 years) with chronic myeloid leukaemia (CML) before and after the introduction of molecular therapy, namely tyrosine kinase inhibitors (TKIs) in Southern-Eastern European (SEE) countries and the USA.We calculated survival among children with CML, acute lymphoblastic (ALL) and acute myeloidleukaemia (AML) in 14 SEE (1990-2014) cancer registries and the U.S.Surveillance, Epidemiology and End Results Program (SEER, 1990-2012). We used Kaplan-Meier curves and multivariate Cox regression models to calculate hazard ratios (HRs) with 95% confidence intervals (CIs).Among 369 CML cases, substantial improvements were noted in 2-year survival during the post-TKI (range: 81-89%) compared to pre-TKI period (49-66%; HR: 0.37, 95% CI: 0.23-0.60). Risk of death was three times higher for <5-year-old children versusthose aged 10-14 years (HR: 3.03, 95% CI: 1.85-4.94) and 56% higher for those living in SEE versusSEER (HR: 1.56, 95% CI: 1.01-2.42). Regardless of geographic area and period of TKI administration, however, age seems to be a significant determinant of CML prognosis (pre-TKI period, HRRegistry data show that introduction of molecular therapies coincides with revolutionised therapeutic outcomes in childhood CML entailing dramatically improved survival which is now similar to that in ALL. Given that age disparities in survival remain substantial, offering optimal therapy to entire populations is an urgent priority.

PubMed | Kharkiv Medical Academy of Postgraduate Education, Russian Clinical Childrens Hospital, West Ukrainian Childrens Medical Center and Belarusian Research Center for Pediatric Oncology
Type: Journal Article | Journal: Journal of clinical immunology | Year: 2016

Omenn syndrome [Mendelian Inheritance (OMIM 603554)] is a genetic disease of the immune system, characterized by the presence of fatal generalized severe erythroderma, lymphoadenopathy, eosinophilia and profound immunodeficiency.We studied clinical and immunologic presentation of the disease manifestation among East Slavs population with genetically confirmed Omenn syndrome.We collected clinical and immunologic data of 11 patients (1 from Belarus, 5--Ukraine, 5--Russia): 6 females, 5 males. The age of Omenn syndrome manifestation varied from the 1st day of life to 1 year and 1 month, the age of diagnosis--20 days to 1 year and 10 months. Nine out of 11 patients had classic immunologic phenotype T(+/-)B-NK+, 1 pt had TlowB + NK+ with CD3 + TCRgd + expansion and 1 had TlowB+/-NK+ phenotype. Eight out of 11 pts had mutation in RAG1 gene, 4 out of 8 had c.368-369delAA (p.K86fsX118) in homozygous state or heterozygous compound. In our cohort of patients, we also described two new mutations in RAG genes (p.E722Q in RAG1 and p.M459R in RAG2). At present, 7/11 were transplanted and 5 out of the transplanted are alive.This study demonstrates that the most popular genetic abnormality in East Slavs children with Omenn syndrome is c.368-369delAA (p.K86fs118) in RAG1 gene, which may be connected with more favorable prognosis because 4/4 patients survived after hematopoietic stem cells transplantation.

Sharapova S.O.,Belarusian Research Center for Pediatric Oncology | Migas A.,Belarusian Research Center for Pediatric Oncology | Guryanova I.,Belarusian Research Center for Pediatric Oncology | Aleshkevich S.,Belarusian Research Center for Pediatric Oncology | And 3 more authors.
Human Immunology | Year: 2013

We report a male with atypical severe combined immunodeficiency caused by heterozygous compound mutations c.256-257del and c.C1331T in RAG1 gene. The patient presents with recurrent bronchopneumonias with obstruction, chronic fibrosing alveolitis, complicated by respiratory failure, pulmonary hypertension and hepatosplenomegaly. He was diagnosed with agammaglobulinemia at the age of 9. His condition was complicated by granulomatous skin disease at the age of 12 despite regular IVIg substitution. Immunological presentation included profound hypogammaglobulinemia and absence of B cells. Under immunoglobulin substitution for 5 years patient has permanent lymphopenia, skewed phenotype of T cells and diminished number of recent thymic emigrants. © 2012 American Society for Histocompatibility and Immunogenetics.

Migas A.A.,Belarusian Research Center for Pediatric Oncology | Mishkova O.A.,Belarusian Research Center for Pediatric Oncology | Ramanouskaya T.V.,Belarusian State University | Ilyushonak I.M.,Belarusian State University | And 2 more authors.
Leukemia Research | Year: 2014

The RUNX1- RUNX1T1 fusion gene, a product of the nonhomologous balanced translocation t(8;21)(q22;q22), is a complex genetic locus. We performed extensive bioinformatic analysis of transcription initiation as well as transcription termination sites in this locus and predicted a number of different RUNX1T1 transcripts. To confirm and quantify the RUNX1T1 gene expression, we analyzed samples from seven acute myeloid leukemia (AML) patients and from the Kasumi-1 cell line. We found variable activity of the four predicted RUNX1T1 promoters located downstream of the chromosome breakpoint. Nineteen alternative RUNX1T1 transcripts were identified by sequencing at least seventeen of which predictably can be translated into functional proteins. While the RUNX1T1 gene is not expressed in normal hematopoietic cells, it may participate in t(8;21)(q22;q22)-dependent leukemic transformation due to its multiple interactions in cell regulatory network particularly through synergistic or antagonistic effects in relation to activity of RUNX1- RUNX1T1 fusion gene. © 2014 Elsevier Ltd.

Meleshko A.,Belarusian Research Center for Pediatric Oncology | Prakharenia I.,Belarusian Research Center for Pediatric Oncology | Kletski S.,Municipal Bureau of Clinical Pathology | Isaikina Y.,Belarusian Research Center for Pediatric Oncology
Pediatric Transplantation | Year: 2013

Although an infusion of culture-expanded MSCs is applied in clinic to improve results of HSCs transplantation and for a treatment of musculoskeletal disorders, homing, and engraftment potential of culture-expanded MSC in humans is still obscure. We report two female patients who received allogeneic BM transplantation as a treatment of hematological diseases and a transplantation of MSCs from third-party male donors. Both patients died within one yr of infectious complications. Specimens of paraffin-embedded blocks of tissues from transplanted patients were taken. The aim of the study was to estimate possible homing and engraftment of allogeneic BM-derived MSCs in some tissues/organs of recipient. Sensitive real-time quantitative PCR analysis was applied with SRY gene as a target. MSC chimerism was found in BM, liver, and spleen of both patients. We conclude that sensitive RQ-PCR analysis is acceptable for low-level chimerism evaluation even in paraffin-embedded tissue specimens. © 2013 John Wiley & Sons A/S. Published by John Wiley & Sons Ltd.

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