Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 6 de 6
Filtrar
1.
Haematologica ; 106(12): 3100-3106, 2021 12 01.
Artículo en Inglés | MEDLINE | ID: mdl-34047178

RESUMEN

The aim of this study was to characterize a large series of 154 patients with acute promyelocytic leukemia (median age, 53 years; range, 18-90 years) and evaluate real-life outcome after up-front treatment with arsenic trioxide and all-trans retinoic acid. All patients were included in the prospective NAPOLEON registry (NCT02192619) between 2013 and 2019. The acute promyelocytic leukemia was de novo in 91% (n=140) and therapy-related in 9% (n=14); 13% (n=20) of the patients were older than 70 years. At diagnosis bleeding/hemorrhage was present in 38% and thrombosis in 3%. Complete remission was achieved in 152 patients (99%), whereas two patients (1%) experienced induction death within 18 days after starting therapy. With a median follow-up of 1.99 years (95% confidence interval: 1.61-2.30 years) 1-year and 2-year overall survival rates were 97% (95% confidence interval: 94-100%) and 95% (95% confidence interval: 91-99%), respectively. Age above 70 years was associated with a significantly shorter overall survival (P<0.001) compared to that of younger patients. So far no relapses have been observed. Six patients (4%) died in complete remission at a median of 0.95 years after diagnosis (range, 0.18-2.38 years). Our data confirm the efficiency and durability of arsenic trioxide and all-trans retinoic acid therapy in the primary management of adults with low-/intermediate-risk acute promyelocytic leukemia in the real-life setting, irrespective of age.


Asunto(s)
Trióxido de Arsénico , Leucemia Promielocítica Aguda , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Trióxido de Arsénico/uso terapéutico , Humanos , Leucemia Promielocítica Aguda/tratamiento farmacológico , Persona de Mediana Edad , Estudios Prospectivos , Inducción de Remisión , Medición de Riesgo , Resultado del Tratamiento , Tretinoina/uso terapéutico , Adulto Joven
2.
Blood ; 119(8): 1882-7, 2012 Feb 23.
Artículo en Inglés | MEDLINE | ID: mdl-22238326

RESUMEN

Diffuse large B-cell lymphoma is the most frequent type of B-cell lymphoma in adult patients but also occurs in children. Patients are currently assigned to therapy regimens based on arbitrarily chosen age limits only (eg, 18 or 60 years) and not biologically justified limits. A total of 364 diffuse large B-cell lymphomas and related mature aggressive B-cell lymphomas other than Burkitt lymphoma from all age groups were analyzed by comprehensive molecular profiling. The probability of several biologic features previously reported to be associated with poor prognosis in diffuse large B-cell lymphoma, such as ABC subtype, BCL2 expression, or cytogenetic complexity, increases with age at diagnosis. Similarly, various genetic features, such as IRF4 translocations, gains in 1q21, 18q21, 7p22, and 7q21, as well as changes in 3q27, including gains and translocations affecting the BCL6 locus, are significantly associated with patient age, but no cut-offs between age groups could be defined. If age was incorporated in multivariate analyses, genetic complexity lost its prognostic significance, whereas the prognostic impact of ABC subtype and age were additive. Our data indicate that aging is a major determinant of lymphoma biology. They challenge current concepts regarding both prognostic biomarkers and treatment stratification based on strict age cut-offs.


Asunto(s)
Aberraciones Cromosómicas , Perfilación de la Expresión Génica , Regulación Leucémica de la Expresión Génica , Linfoma de Células B Grandes Difuso/genética , Adolescente , Adulto , Factores de Edad , Análisis de Varianza , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Hibridación Genómica Comparativa , Proteínas de Unión al ADN/genética , Proteínas de Unión al ADN/metabolismo , Proteína Potenciadora del Homólogo Zeste 2 , Humanos , Inmunohistoquímica , Hibridación Fluorescente in Situ , Modelos Lineales , Linfoma de Células B Grandes Difuso/diagnóstico , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Persona de Mediana Edad , Mutación , Evaluación de Resultado en la Atención de Salud/métodos , Complejo Represivo Polycomb 2 , Pronóstico , Proteínas Proto-Oncogénicas c-bcl-2/genética , Proteínas Proto-Oncogénicas c-bcl-2/metabolismo , Proteínas Proto-Oncogénicas c-bcl-6 , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Adulto Joven
3.
Blood ; 112(8): 3322-9, 2008 Oct 15.
Artículo en Inglés | MEDLINE | ID: mdl-18689542

RESUMEN

The exact prognostic role of TP53 mutations (without 17p deletion) and any impact of the deletion without TP53 mutation in CLL are unclear. We studied 126 well-characterized CLL patients by direct sequencing and DHPLC to detect TP53 mutations (exons 2-11). Most patients with 17p deletions also had TP53 mutations (81%). Mutations in the absence of 17p deletions were found in 4.5%. We found a shorter survival for patients with TP53 mutation (n = 18; P = .002), which was more pronounced when analyzed from the time point of mutation detection (6.8 vs 69 months, P < .001). The survival was equally poor for patients with deletion 17p plus TP53 mutation (7.6 months, n = 13), TP53 mutation only (5.5 months, n = 5), and 17p deletion only (5.4 months, n = 3). The prognostic impact of TP53 mutation (HR 3.71) was shown to be independent of stage, VH status, and 11q and 17p deletion in multivariate analysis. Serial samples showed evidence of clonal evolution and increasing clone size during chemotherapy, suggesting that there may be patients where this treatment is potentially harmful. TP53 mutations are associated with poor sur-vival once they occur in CLL. The de-monstration of clonal evolution under selective pressure supports the biologic significance of TP53 mutations in CLL.


Asunto(s)
Genes p53 , Leucemia Linfocítica Crónica de Células B/diagnóstico , Leucemia Linfocítica Crónica de Células B/genética , Mutación , Adulto , Anciano , Anciano de 80 o más Años , Cromosomas Humanos Par 17 , Estudios de Cohortes , Estudios de Seguimiento , Eliminación de Gen , Humanos , Leucemia Linfocítica Crónica de Células B/mortalidad , Persona de Mediana Edad , Pronóstico , Factores de Tiempo , Resultado del Tratamiento
4.
Oncotarget ; 9(29): 20781-20794, 2018 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-29755689

RESUMEN

Malignant pleural mesothelioma (MPM) is a neoplasm with inferior prognosis and notorious chemotherapeutic resistance. Targeting aberrantly overexpressed kinases to cure MPM is a promising therapeutic strategy. Here, we examined ALK, MET and mTOR as potential therapeutic targets and determined the combinatorial efficacy of ALK and mTOR targeting on tumor cell growth in vivo. First, ALK overexpression, rearrangement and mutation were studied in primary MPM by qRT-PCR, FISH, immunohistochemistry and sequence analysis; mTOR and MET expression by qRT-PCR and immunohistochemistry. Overexpression of full-length ALK transcripts was observed in 25 (19.5%) of 128 primary MPM, of which ten expressed ALK protein. ALK overexpression was not associated with gene rearrangement, amplification or kinase-domain mutation. mTOR protein was detected in 28.7% MPM, co-expressed with ALK or MET in 5% and 15% MPM, respectively. The ALK/MET inhibitor crizotinib enhanced the anti-tumor effect of the mTOR-inhibitor rapamycin in a patient-derived MPM xenograft with co-activated ALK/mTOR: combined therapy achieved tumor shrinkage in 4/5 tumors and growth stagnation in one tumor. Treatment effects on proliferation, apoptosis, autophagy and pathway signaling were assessed using Ki-67 immunohistochemistry, TUNEL assay, LC3B immunofluorescence, and immunoblotting. Co-treatment significantly suppressed cell proliferation and induced autophagy and caspase-independent, necrotic cell death. Rapamycin/crizotinib simultaneously inhibited mTORC1 (evidenced by S6 kinase and RPS6 dephosphorylation) and ALK signaling (ALK, AKT, STAT3 dephosphorylation), and crizotinib suppressed the adverse AKT activation induced by rapamycin. In conclusion, co-treatment with rapamycin and crizotinib is effective in suppressing MPM tumor growth and should be further explored as a therapeutic alternative in mesothelioma.

5.
Leukemia ; 32(7): 1621-1630, 2018 07.
Artículo en Inglés | MEDLINE | ID: mdl-29720733

RESUMEN

In this phase Ib/IIa study (ClinicalTrials.gov Identifier: NCT00850382) of the German-Austrian AML Study Group (AMLSG) the multikinase inhibitor dasatinib was added to intensive induction and consolidation chemotherapy and administered as single agent for 1-year maintenance in first-line treatment of adult patients with core-binding factor (CBF) acute myeloid leukemia (AML). The primary combined end point in this study was safety and feasibility, and included the rates of early (ED) and hypoplastic (HD) deaths, pleural/pericardial effusion 3°/4° and liver toxicity 3°/4°, and the rate of refractory disease. Secondary end points were cumulative incidence of relapse (CIR) and death in complete remission (CID), and overall survival (OS). Eighty-nine pts [median age 49.5 years, range: 19-73 years; t(8;21), n = 37; inv (16), n = 52] were included. No unexpected excess in toxicity was observed. The rates of ED/HD and CR/CRi were 4.5% (4/89) and 94% (84/89), respectively. The 4-year estimated CIR, CID, and OS were 33.1% [95%-CI (confidence interval), 22.7-43.4%], 6.0% (95% CI, 0.9-11.2%), and 74.7% (95% CI, 66.1-84.5%), respectively. On the basis of the acceptable toxicity profile and favorable outcome in the AMLSG 11-08 trial, a confirmatory randomized phase III trial with dasatinib in adults with CBF-AML is ongoing (ClinicalTrials.gov Identifier: NCT02013648).


Asunto(s)
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Factores de Unión al Sitio Principal/genética , Leucemia Mieloide Aguda/tratamiento farmacológico , Leucemia Mieloide Aguda/genética , Adulto , Anciano , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Biomarcadores de Tumor , Factores de Unión al Sitio Principal/metabolismo , Dasatinib/administración & dosificación , Femenino , Humanos , Leucemia Mieloide Aguda/mortalidad , Leucemia Mieloide Aguda/patología , Masculino , Persona de Mediana Edad , Mutación , Proteínas Proto-Oncogénicas c-kit/genética , Recurrencia , Inducción de Remisión , Resultado del Tratamiento , Adulto Joven
6.
Exp Hematol ; 32(4): 382-9, 2004 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-15050749

RESUMEN

OBJECTIVE: Expression of the cytokine receptor CD30 is a typical feature of anaplastic large cell lymphomas (ALCL). CD30-induced effects have a great impact on cell activation and viability. MATERIALS AND METHODS: Using Karpas 299 cells, we performed differential display reverse transcriptase polymerase chain reaction (DDRT-PCR) to identify novel genes involved in CD30 signaling in ALCL. Activation of CD30 was induced by treatment with immobilized anti-CD30 antibody. RNA and protein expression were confirmed in different cell lines by Northern and Western blot analysis. Fluorescence-activated cell sorting (FACS) analysis was applied to examine cell viability. Nuclear factor kappaB (NFkappaB) pathways were blocked using a specific inhibitor. RESULTS: We found strongly enhanced expression of the cellular inhibitor of apoptosis cIAP1 and cIAP2 in Karpas 299 cells stimulated with anti-CD30. Furthermore, we showed that CD30-regulated expression of cIAP1 and cIAP2 was mediated by NFkappaB. Induction of NFkappaB, cIAP1, and cIAP2 correlated with partial protection from apoptotic cell death caused by etoposide. Correspondingly, inhibition of the NFkappaB pathway not only prevented the prevalent antiapoptotic effects mediated by CD30, but even led to CD30-induced apoptosis. Finally, we found enhanced expression of cIAP1 and cIAP2 in several other ALCL cell lines and the HD-derived cell line HDLM-2 upon CD30 stimulation. CONCLUSIONS: Our results indicate that CD30-mediated protection from apoptosis is a common feature of CD30(+) cells. Therefore, CD30-induced signaling may have a significant impact on the clinical outcome of patients with ALCL.


Asunto(s)
Apoptosis/fisiología , Regulación Neoplásica de la Expresión Génica/fisiología , Antígeno Ki-1/fisiología , Linfoma de Células B Grandes Difuso/patología , FN-kappa B/fisiología , Proteínas de Neoplasias/fisiología , Biosíntesis de Proteínas , Antineoplásicos Fitogénicos/farmacología , Apoptosis/efectos de los fármacos , Apoptosis/genética , Línea Celular Tumoral , Etopósido/farmacología , Humanos , Proteínas Inhibidoras de la Apoptosis , Linfoma de Células B Grandes Difuso/tratamiento farmacológico , Linfoma de Células B Grandes Difuso/genética , Proteínas de Neoplasias/biosíntesis , Proteínas de Neoplasias/genética , Proteínas/genética , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Transducción de Señal , Ubiquitina-Proteína Ligasas
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA