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1.
Hematol Oncol ; 42(1): e3216, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-37772620

RESUMO

Chronic lymphocytic leukemia (CLL) therapies differ in efficacy, side effects, route, frequency, and duration of administration. We assessed patient preferences for treatment attributes and evaluated associations with disease stage, treatment line, and socio-demographic characteristics in a cross sectional, observational study conducted at 16 Italian hematology centers. Study visits occurred between February and July 2020; 401 adult patients with CLL (201 Watch and Wait (W&W), 200 treated) participated in a discrete choice experiment (DCE), composed of 8 choices between pairs of treatment profiles with different levels of 5 attributes of currently available CLL treatments (length of response, route and duration of administration, risk of side effects including diarrhea, infections, or organ damage). Health-related quality of life was assessed with the EQ-5D-5L, EORTC QLQ-C30 and QLQ CLL-16. Previously treated patients had longer disease duration (7 vs. 5 years), higher prevalence of serious comorbidities (45.5% vs. 36.2%) and high-risk molecular markers (unmutated IGHV 55.6% vs. 17.1%; TP53 mutation 15.2% vs. 4.0%). Health-related quality of life scores were similar between groups. In the DCE, W&W patients rated "possible occurrence of infections" highest (relative importance [RI] = 36.2%), followed by "treatment and relevant duration" (RI = 28.0%) and "progression-free survival (PFS)" (RI = 16.9%). Previously treated patients rated "treatment and relevant duration" highest (RI = 33.3%), followed by "possible occurrence of infections" (RI = 28.8%), "possible occurrence of organ damage" (RI = 19.4%), and "PFS" (RI = 9.8%). Concern over infection was rated highest overall; unexpectedly PFS was not among the most important criteria in either group, suggesting that the first COVID-19 pandemic wave may have influenced patient preferences and concerns about CLL therapy options.


Assuntos
Leucemia Linfocítica Crônica de Células B , Adulto , Humanos , Leucemia Linfocítica Crônica de Células B/tratamento farmacológico , Leucemia Linfocítica Crônica de Células B/genética , Preferência do Paciente , Qualidade de Vida , Estudos Transversais , Pandemias
2.
Hematol Oncol ; 41(4): 621-630, 2023 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36680368

RESUMO

Chronic lymphocytic leukemia (CLL) is the most common form of adult leukemia in the western world. In Italy, venetoclax was approved for use in patients with CLL as monotherapy in 2017 and in combinations in 2019. As a result of this delayed approval, there are relatively few real-world studies from Italian clinical practice and much of the data are in heavily pretreated patients. We have collected the available studies in Italian routine practice. Three studies confirm the effectiveness and tolerability of this agent in patients with relapsed/refractory CLL and high-risk disease characteristics, many of whom had received prior B-cell receptor signaling treatment. Addition of rituximab to venetoclax produced more complete responses in patients with relapsed/refractory CLL, while higher disease burden and progression while receiving a prior Bruton's tyrosine kinase inhibitor were both associated with poorer outcomes in patients treated with venetoclax. Venetoclax was well-tolerated with low discontinuation rates. No studies of venetoclax plus obinutuzumab for the first-line treatment of patients with CLL were available due to the short time since approval in Italy. Several cohorts addressed the impact of COVID-19 on patient management and outcomes, suggesting that treated patients and those in clinical observation had similar rates of COVID-19-related hospital admission, intensive care unit admission, and mortality. Overall, the responses and tolerance to venetoclax observed in the Italian real-world setting confirm the tolerability and effectiveness of venetoclax regimens in high-risk patients.


Assuntos
Antineoplásicos , COVID-19 , Leucemia Linfocítica Crônica de Células B , Linfoma de Células B , Adulto , Humanos , Leucemia Linfocítica Crônica de Células B/tratamento farmacológico , Antineoplásicos/uso terapêutico , COVID-19/etiologia , Rituximab/efeitos adversos , Linfoma de Células B/tratamento farmacológico , Recidiva , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos
3.
Br J Haematol ; 172(4): 554-60, 2016 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-26684545

RESUMO

This study aimed to review the clinical features and outcome of 53 patients with solitary plasmacytoma managed at our Institution between 1976 and 2012. Thirty-five patients had bone solitary plasmacytoma and 18 extramedullary solitary plasmacytoma. Tumour sizes were larger in patients with bone involvement (P = 0·003). Treatment consisted of local radiotherapy (n = 26), radiotherapy + chemotherapy (n = 15), surgery (n = 4) and chemotherapy (n = 8); the local control rate was 94·3%. Progression to multiple myeloma was recorded in 20/35 (57·1%) patients with bone involvement and in 1/18 (5·5%) patients with extramedullary disease (P = 0·0003). The 5-year overall survival (OS) rate was 78·4%; bone solitary plasmacytoma patients had a significantly worse OS (71·9% vs. 88·2%, respectively; P = 0·029) and 5-year progression-free survival (PFS; 53·0% vs. 88·5%; P = 0·0003) compared to extramedullary solitary plasmacytoma patients. On univariate analysis, bone disease and size (≥5 cm) impacted negatively on PFS (P = 0·0027 and P = 0·04, respectively). Bone disease also affected OS (P = 0·04). In multivariate analysis bone location was the only independent prognostic factor for PFS (P = 0·0041) and OS (P = 0·021). Patients with bone solitary plasmacytoma have a significantly worse prognosis than extramedullary solitary plasmacytoma cases.


Assuntos
Neoplasias Ósseas/terapia , Plasmocitoma/terapia , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico , Neoplasias Ósseas/mortalidade , Neoplasias Ósseas/patologia , Terapia Combinada , Progressão da Doença , Intervalo Livre de Doença , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Mieloma Múltiplo/etiologia , Mieloma Múltiplo/mortalidade , Mieloma Múltiplo/patologia , Plasmocitoma/mortalidade , Plasmocitoma/patologia , Prognóstico
4.
Hematol Oncol ; 33(1): 48-51, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-25950027

RESUMO

Lenalidomide induces in patients with myelodysplastic syndrome (MDS) and del(5q) erythroid and cytogenetic response rates as high as 75% and 50%, respectively. It is still unclear, however, how long lenalidomide treatment should be continued and whether or not the drug could be interrupted. To assess the feasibility of lenalidomide discontinuation, we revised a cohort of 16 low-risk MDS patients with del(5q) treated at our institute in a phase II multicentric Italian study. Among the 12 responding patients, four discontinued lenalidomide while in complete response. All four patients needed during treatment a permanent lenalidomide reduction from 10 to 5 mg/day because of haematological toxicity (three patients) or grade 3 muscular and bone pain (one patient). At lenalidomide discontinuation after 16, 20, 27 and 20 months from the start, respectively, all four patients were in complete hematologic response and three forth in complete cytogenetic response. Three patients are still in response after 36, 30 and 20 months from lenalidomide discontinuation, respectively: The remaining patient relapsed after 20 months, and she is now receiving a new course of lenalidomide. In conclusion, long-lasting remissions are achievable in MDS patients with del(5q) in complete response after lenalidomide discontinuation.


Assuntos
Deleção Cromossômica , Cromossomos Humanos Par 5/genética , Síndromes Mielodisplásicas/tratamento farmacológico , Talidomida/análogos & derivados , Idoso , Inibidores da Angiogênese/efeitos adversos , Inibidores da Angiogênese/uso terapêutico , Feminino , Doenças Hematológicas/induzido quimicamente , Humanos , Lenalidomida , Pessoa de Meia-Idade , Síndromes Mielodisplásicas/genética , Dor/induzido quimicamente , Indução de Remissão , Talidomida/efeitos adversos , Talidomida/uso terapêutico , Fatores de Tempo , Resultado do Tratamento
5.
Ann Hematol ; 94(2): 195-200, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25186786

RESUMO

All-trans retinoic acid (ATRA) has made acute promyelocytic leukemia (APL) a very curable disease also in patients aged >60 years; however, there are only few case reports in very elderly APL patients. To address this issue, we reviewed treatment results in 13 patients aged >70 years with newly diagnosed APL followed at our institution from January 1991 to December 2008. According to Sanz score, seven patients were at low risk, five at intermediate risk, and one at high risk. Induction therapy consisted of ATRA + idarubicin in nine patients (3/9 with reduced idarubicin dosage) and ATRA alone in four patients; in this latter group, however, 2/4 needed to add chemotherapy (CHT) due to hyperleukocytosis during ATRA treatment. All patients achieved both morphological and molecular complete remission (CR) after a median time of 51 [interquartile range (IR) 43-55] and 114 (IR 74-155) days, respectively. Infective complications were observed in 10/13 patients, APL differentiation syndrome in 3/13 patients. Twelve patients received consolidation therapy, followed by maintenance treatment in nine patients. Five patients relapsed after 7, 8, 11, 35, and 56 months. At present, seven patients are still alive, five died due to disease progression (four) or senectus while in CR (one), and one was lost to follow-up while in CR. The 5-year event-free survival was 56.1 % (95 % CI, 26.0-86.2); the 5-year overall survival (OS) was 64.5 % (95 % CI, 35.6-93.4). ATRA-based treatment of APL is safe and effective also in very elderly patients, with long-lasting disease-free OS.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Leucemia Promielocítica Aguda/tratamento farmacológico , Idoso , Idoso de 80 Anos ou mais , Citarabina/administração & dosagem , Etoposídeo/administração & dosagem , Feminino , Seguimentos , Humanos , Idarubicina/administração & dosagem , Interferon-alfa/administração & dosagem , Masculino , Mercaptopurina/administração & dosagem , Mitoxantrona/administração & dosagem , Indução de Remissão , Análise de Sobrevida , Fatores de Tempo , Resultado do Tratamento , Tretinoína/administração & dosagem
6.
Am J Hematol ; 90(2): 105-8, 2015 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-25349084

RESUMO

In patients with chronic myeloid leukemia (CML) responsive to imatinib, it is still unknown whether the long-lasting treatment could induce the appearance of a persistent/late chronic anemia. To highlight this issue, we revised 128 patients with CML (M/F 64/64, median age at diagnosis 56.9 years, interquartile range 43.0-69.3) treated at our Institution with 1st line imatinib for at least 36 months and in stable complete cytogenetic response. At the 36th month of imatinib, a chronic anemia (Hb < 12 g/dl for > 6 months) was present in 38/128 patients (29.6%): the anemia was moderate (Hb > 8 ≤ 10 g/dl) in 12 patients (9.3%) and mild (Hb > 10 < 12 g/dl) in 26 patients (20.3%). All patients with persistent/late chronic anemia had a low reticulocyte count and 8/38 a condition of iron deficiency without clinical and instrumental signs of chronic blood loss. Four out of 38 patients (10.5%) needed red cell transfusions during the follow-up. At a landmark analysis from the 36th month of imatinib treatment, cumulative 4-year overall survival (OS) for patients with chronic anemia was 94.4% (CI 95% 83.8-100) compared to 93.5% (CI 95% 87.2-99.8) for patients without chronic anemia (P = 0.617). In conclusion, the occurrence of a late chronic anemia during long-lasting treatment with imatinib has been observed in about 30% of our responsive patients: its occurrence does not seem to affect OS, but its real impact should be evaluated on a larger cohort of patients.


Assuntos
Anemia/tratamento farmacológico , Antineoplásicos/uso terapêutico , Benzamidas/uso terapêutico , Leucemia Mielogênica Crônica BCR-ABL Positiva/tratamento farmacológico , Piperazinas/uso terapêutico , Pirimidinas/uso terapêutico , Adulto , Idoso , Anemia/complicações , Anemia/patologia , Doença Crônica , Esquema de Medicação , Feminino , Seguimentos , Humanos , Mesilato de Imatinib , Leucemia Mielogênica Crônica BCR-ABL Positiva/complicações , Leucemia Mielogênica Crônica BCR-ABL Positiva/patologia , Masculino , Pessoa de Meia-Idade , Indução de Remissão , Reticulócitos/patologia , Índice de Gravidade de Doença , Fatores Sexuais , Análise de Sobrevida
7.
Leuk Res Rep ; 21: 100453, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39035747

RESUMO

Real-world data on treatment patterns and outcomes of patients with acute myeloid leukemia unfit for intensive chemotherapy are lacking before the advent of precision medicine in this setting. Herein, we present the Italian sub-analysis of the CURRENT study in AML patients unfit for first line intensive chemotherapy, evaluating patients' outcomes between 2015 and 2018. Among 74 evaluable patients, 62 received systemic treatments (most used therapy was hypomethylating agents), while 12 best supportive care. Key results include both efficacy and safety data, as well as HCRU and treatment patterns. In first-line therapy cohort median OS was 13.4 months vs. 2.7 months for BSC.

8.
Acta Haematol ; 129(2): 126-34, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-23207803

RESUMO

AIM: To address the incidence and the prognostic role of a very early standard complete cytogenetic response (CCyR) or all Ph- metaphases (MET-, when <20 cells were evaluable). METHODS: We revised 182 chronic phase chronic myelogenous leukemia patients treated with frontline imatinib (IM) at two institutions from June 2002 to June 2011. RESULTS: After 3 months of treatment, 138 patients (75.8%) achieved CCyR/MET- while 44 patients (24.2%) still presented Ph+ metaphases (MET+) (<33%, 24 patients; ≥33%, 20 patients). On univariate analysis, palpable spleen enlargement (p < 0.001), WBC count >100.0 × 10(9)/l at onset (p < 0.001), and male gender (p = 0.019) had a negative impact on achievement of CCyR/MET- at 3 months. Among patients with CCyR/MET- after 3 months, there were 15 failures (10.8%) compared to 21 (47.7%) among patients with MET+ (p < 0.001). The 5-year overall survival was 97.0% in patients CCyR/MET- at 3 months and 91.8% in patients MET+ at 3 months (p = 0.277); the 5-year progression-free survival was 88.2% in patients CCyR/MET- at 3 months and 48.4% in patients MET+ at 3 months (p < 0.001). CONCLUSIONS: The achievement of CCyR/MET- at 3 months seems to have prognostic relevance and could be a very early and useful indicator of an excellent response to IM beyond European LeukemiaNet guidelines.


Assuntos
Leucemia Mielogênica Crônica BCR-ABL Positiva/tratamento farmacológico , Cromossomo Filadélfia/efeitos dos fármacos , Piperazinas/uso terapêutico , Inibidores de Proteínas Quinases/uso terapêutico , Pirimidinas/uso terapêutico , Idoso , Benzamidas , Intervalo Livre de Doença , Feminino , Humanos , Mesilato de Imatinib , Leucemia Mielogênica Crônica BCR-ABL Positiva/genética , Masculino , Metáfase/efeitos dos fármacos , Pessoa de Meia-Idade , Prognóstico , Proteínas Tirosina Quinases/antagonistas & inibidores
9.
Expert Rev Hematol ; 16(3): 181-190, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36876439

RESUMO

INTRODUCTION: Age has historically been considered the main criterion to determine eligibility for intensive chemotherapy in patients with acute myeloid leukemia (AML), but age alone can no longer be considered an absolute indicator in determining which patients should be defined as unfit. Assessment of fitness for a given treatment today serves an important role in tailoring therapeutic options. AREAS COVERED: This review examines the main options used in real life to define eligibility for intensive and nonintensive chemotherapy in patients with AML, with a main focus on the Italian SIE/SIES/GITMO Consensus Criteria. Other published real-life experiences are also reviewed, analyzing the correlation between these criteria and short-term mortality, and thus expected outcomes. EXPERT OPINION: Assessment of fitness is mandatory at diagnosis to tailor treatment to the greatest degree possible, evaluating the patient's individual profile. This is especially relevant when considering the availability of newer, less toxic therapeutic regimens, which have shown promising results in patients with AML who are older or considered unfit for intensive treatment. Fitness assessment is now a fundamental part of AML management and a critical step that can potentially influence outcomes and not just predict them.


In patients with acute myeloid leukemia (AML), age has generally been considered as the main factor to determine if intensive chemotherapy can be carried out (fitness). However, this has been gradually changing in recent years. In addition to age, comorbidities and overall performance status are also important in determining if the patient should undergo intensive chemotherapy and have an important role in tailoring therapeutic options. Consensus criteria to define eligibility for intensive and nonintensive chemotherapy in patients with AML have been proposed, which have been shown to correlate well with expected outcomes. Today, given the evolution of the treatment armamentarium, assessment of a patient's 'fitness' is compulsory to select the most appropriate treatment for each patient.


Assuntos
Antineoplásicos , Leucemia Mieloide Aguda , Humanos , Antineoplásicos/uso terapêutico , Leucemia Mieloide Aguda/terapia , Leucemia Mieloide Aguda/tratamento farmacológico
10.
Ann Hematol ; 91(9): 1345-9, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-22569854

RESUMO

We here describe a single-institution experience on 40 patients with myelodysplastic syndromes (MDS) consecutively treated with deferasirox at the dose of 10-30 mg/kg/day according to Consensus Guidelines on Iron Chelation Therapy, outside of clinical trials. Serum ferritin (SF) was measured monthly, and safety assessment included monitoring of adverse events during treatment and of liver and renal parameters. Median SF at baseline of the 40 patients was 2,878 ng/ml. Median dose of deferasirox was 1,125 mg/day. At a median follow-up of 12 months of treatment, there was a significant reduction in SF from baseline, the median value being 1,400 ng/ml (p = 0.001). Interruptions due to toxicity were recorded in 40 % of patients: most common adverse events were diarrhoea (five patients, 12.5 %) and skin rash (four patients, 10 %). Seven patients had increased serum creatinine values >33 % above baseline, but there were no progressive increases. Four patients (three refractory anaemia and one refractory anaemia with excess blasts type 1) had a reduction of transfusion requirement (from a median of 5 to 1 unit/month) according to International Working Group 2006 criteria, with mean Hb value increasing from 8.5 to 10.5 g/dl, and mean Hb improvement being 2 g/dl (p = 0.02). No increased toxicity was noted when deferasirox was used concomitantly with azacitidine (eight patients who were intermediate 2 International Prognostic Scoring System risk) or lenalidomide (two patients with del(5q)). In conclusion, the oral iron chelator deferasirox is effective and safe when used in MDS patients with transfusion requirement, also if administered concomitantly with other drugs.


Assuntos
Benzoatos/uso terapêutico , Quelantes/uso terapêutico , Síndromes Mielodisplásicas/tratamento farmacológico , Triazóis/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antimetabólitos/uso terapêutico , Azacitidina/uso terapêutico , Benzoatos/administração & dosagem , Benzoatos/efeitos adversos , Quelantes/administração & dosagem , Quelantes/efeitos adversos , Deferasirox , Toxidermias/etiologia , Avaliação de Medicamentos , Quimioterapia Combinada , Feminino , Seguimentos , Gastroenteropatias/induzido quimicamente , Hematínicos/efeitos adversos , Hematínicos/uso terapêutico , Humanos , Sobrecarga de Ferro/prevenção & controle , Nefropatias/induzido quimicamente , Lenalidomida , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Talidomida/análogos & derivados , Talidomida/uso terapêutico , Resultado do Tratamento , Triazóis/administração & dosagem , Triazóis/efeitos adversos
13.
J Diabetes ; 7(4): 493-6, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-25060764

RESUMO

BACKGROUND: The aim of the present study was to assess the role of a concomitant type 2 diabetes as a potentially negative factor in the management of low-risk myelodysplastic syndrome (MDS) patients treated with high-dose (40,000 UI s.c. 2 times/week) recombinant human erythropoietin (EPO) alpha (rHuEPO alpha). METHODS: One hundred and forty patients (M/F 69/71, median age 76, interquartile range [IR] 68-81) were included in the analysis: 27/140 (19.2%) had a concomitant type 2 diabetes. RESULTS: No difference was reported between patients with and without diabetes as to the grade of anemia, the EPO endogenous levels and the need for transfusional requirement at baseline. Erythroid response was achieved in 79/140 patients (56.4%): factors associated with response were lower EPO levels (P < 0.0001), higher baseline Hb levels (P < 0.0001) and transfusion independence (P < 0.0001). Diabetes was not predictive of response: 17/27 (62.9%) patients with diabetes were responsive to high-dose EPO compared with 62/113 (54.8%) patients without diabetes (P = 0.446). This was confirmed in multivariate analysis, controlling for the effects of Hb levels, transfusion-dependence and serum EPO levels. No difference was observed in relapse rate, response duration and OS between patients with and without diabetes. CONCLUSIONS: Concomitant type 2 diabetes was not a major concern in the management of MDS patients.


Assuntos
Diabetes Mellitus Tipo 2/complicações , Eritropoetina/uso terapêutico , Síndromes Mielodisplásicas/tratamento farmacológico , Idoso , Feminino , Humanos , Masculino , Síndromes Mielodisplásicas/complicações
14.
Patient Prefer Adherence ; 8: 939-46, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-25045252

RESUMO

The use of novel agents such as thalidomide, lenalidomide, and bortezomib has considerably improved the outcome of multiple myeloma patients. Besides greater biological activity, these drugs unfortunately have also been associated with greater toxicity. To evaluate the positive effect on the quality of life of patients, driven by both the tolerability and antimyeloma activity of bortezomib, we analyzed data that have been published concerning different strategies used to improve its tolerability as once weekly and/or subcutaneous administration.

15.
Leuk Lymphoma ; 53(12): 2439-43, 2012 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-22647078

RESUMO

Fewer than 10% of patients with myelodysplastic syndromes (MDS) are younger than 50 years. A series of 91 younger patients (median age 44 years with female prevalence) are reported and compared with elderly patients. Frequent karyotypic changes were trisomy 8 (9.8%) and monosomy 7 (5%). Twenty-three patients had occupational exposure to potential mutagens (benzene and solvents), with a male predominance, higher frequency of refractory cytopenia with multilineage dysplasia (RCMD) (52%) and higher frequency of monosomy 7 (21.7%). At a median follow-up of 72 months, 22 patients (24%) evolved to acute leukemia, with higher frequency being observed among the exposed cohort (39% vs. 19% non-exposed). Unfavorable factors for overall survival were: age > 40 years, > 5% of blasts, trilinear bone marrow involvement and intermediate-high World Health Organization Prognostic Scoring System (WPSS) risk. The present results suggest that younger MDS could be identified as a distinct subset. For patients belonging to the low/intermediate-I risk group, due to a low transformation rate, aggressive approaches should rarely be recommended.


Assuntos
Aberrações Cromossômicas , Síndromes Mielodisplásicas/genética , Doenças Profissionais/genética , Exposição Ocupacional , Doença Aguda , Adulto , Idoso , Análise de Variância , Benzeno/intoxicação , Transformação Celular Neoplásica/efeitos dos fármacos , Transformação Celular Neoplásica/genética , Cromossomos Humanos Par 7/genética , Cromossomos Humanos Par 8/genética , Progressão da Doença , Feminino , Humanos , Leucemia/genética , Leucemia/patologia , Masculino , Pessoa de Meia-Idade , Monossomia , Síndromes Mielodisplásicas/induzido quimicamente , Síndromes Mielodisplásicas/patologia , Doenças Profissionais/induzido quimicamente , Doenças Profissionais/patologia , Prognóstico , Solventes/intoxicação , Análise de Sobrevida , Trissomia , Adulto Jovem
17.
J Exp Clin Cancer Res ; 28: 39, 2009 Mar 19.
Artigo em Inglês | MEDLINE | ID: mdl-19298651

RESUMO

Studies on activated cell-signaling pathways responsible for neoplastic transformation are numerous in solid tumors and in adult leukemias. Despite of positive results in the evolution of pediatric hematopoietic neoplasias, there are some high-risk subtypes at worse prognosis. The aim of this study was to asses the expression and activation status of crucial proteins involved in cell-signaling pathways in order to identify molecular alterations responsible for the proliferation and/or escape from apoptosis of leukemic blasts. The quantitative and qualitative expression and activation of Erk-1, c-Jun, Caspase8, and Gadd45a was analyzed, by immunocytochemical (ICC) and western blotting methods, in bone marrow blasts of 72 patients affected by acute myeloid leukemia (AML), T-cell acute lymphoblastic leukemia (ALL) and stage IV non-Hodgkin Lymphoma (NHL). We found an upregulation of Erk-1, Caspase8, c-Jun, and Gadd45a proteins with a constitutive activation in 95.8%, 91.7%, 86.2%, 83.4% of analyzed specimens, respectively. It is worth noting that all AML patients showed an upregulation of all proteins studied and the high expression of GADD45a was associated to the lowest DFS median (p = 0.04). On univariate analysis, only Erk-1 phosphorylation status was found to be correlated with a significantly shorter 5-years DFS in all disease subgroups (p = 0.033) and the lowest DFS median in ALL/NHL subgroup (p = 0.04). Moreover, the simultaneous activation of multiple kinases, as we found for c-Jun and Erk-1 (r = 0.26; p = 0.025), might synergistically enhance survival and proliferation potential of leukemic cells. These results demonstrate an involvement of these proteins in survival of blast cells and, consequently, on relapse percentages of the different subgroups of patients.


Assuntos
Biomarcadores Tumorais/metabolismo , Proteínas de Ciclo Celular/metabolismo , Transtornos Linfoproliferativos/metabolismo , Transtornos Linfoproliferativos/patologia , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Proteínas Nucleares/metabolismo , Adolescente , Caspase 8/metabolismo , Criança , Pré-Escolar , Ativação Enzimática , Feminino , Humanos , Lactente , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , Transtornos Linfoproliferativos/classificação , Transtornos Linfoproliferativos/terapia , Masculino , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Fosforilação , Prognóstico , Fatores de Risco , Resultado do Tratamento
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