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1.
Artigo em Inglês | MEDLINE | ID: mdl-38083635

RESUMO

The present study aims to assess a novel technological device suitable for investigating perceptual and attentional competencies in people with or without sensory impairment. The TechPAD is a cabled system including embedded sensors and actuators to enable visual, auditory, and tactile interactions and a capacitive surface receiving inputs from the user. The system is conceived to create multisensory environments, using multiple units controlled separately and simultaneously. We assessed the device by adapting a spatial attention task comparing performances in different cognitive load conditions (high or low) and stimulation (unimodal, bimodal, or trimodal). 28 sighted adults were asked to monitor both the central and peripheral parts of the device and to tap a target stimulus (either visual, auditory, haptic, or multimodal) as fast as they could. Our results suggest that this new device can provide congruent and incongruent multimodal stimuli and quantitatively measure parameters such as reaction time and accuracy, allowing to investigate perceptual mechanisms in multisensory environments.Clinical Relevance-The TechPad is a reliable tool for the assessment of spatial attention during interactive tasks. its application in clinical trials will pave the way to its role in multisensory rehabilitation.


Assuntos
Atenção , Visão Ocular , Adulto , Humanos , Atenção/fisiologia , Tempo de Reação , Tato/fisiologia , Análise e Desempenho de Tarefas
2.
Sci Rep ; 12(1): 22538, 2022 12 29.
Artigo em Inglês | MEDLINE | ID: mdl-36581659

RESUMO

Several shreds of evidence indicate that visual deprivation does not alter numerical competence neither in adults nor in children. However, studies reporting non-impaired numerical abilities in the visually impaired population present some limitations: (a) they mainly assessed the ability to process numbers (e.g. mathematical competence) rather than represent numbers (e.g. mental number line); (b) they principally focused on positive rather than negative number estimates; (c) they investigated numerical abilities in adult individuals except one focusing on children (Crollen et al. in Cognition 210:104586, 2021). Overall, this could limit a comprehensive explanation of the role exerted by vision on numerical processing when vision is compromised. Here we investigated how congenital visual deprivation affects the ability to represent positive and negative numbers in horizontal and sagittal planes in visually impaired children (thirteen children with low vision, eight children with complete blindness, age range 6-15 years old). We adapted the number-to-position paradigm adopted by Crollen et al. (Cognition 210:104586, 2021), asking children to indicate the spatial position of positive and negative numbers on a graduated rule positioned horizontally or sagittally in the frontal plane. Results suggest that long-term visual deprivation alters the ability to identify the spatial position of numbers independently of the spatial plane and the number polarity. Moreover, results indicate that relying on poor visual acuity is detrimental for low vision children when asked to localize both positive and negative numbers in space, suggesting that visual experience might have a differential role in numerical processing depending on number polarity. Such findings add knowledge related to the impact of visual experience on numerical processing. Since both positive and negative numbers are fundamental aspects of learning mathematical principles, the outcomes of the present study inform about the need to implement early rehabilitation strategies to prevent the risk of numerical difficulties in visually impaired children.


Assuntos
Baixa Visão , Adulto , Humanos , Criança , Adolescente , Cegueira , Cognição , Visão Ocular , Aprendizagem
4.
Sci Rep ; 11(1): 12826, 2021 06 18.
Artigo em Inglês | MEDLINE | ID: mdl-34145317

RESUMO

Climate and land use are rapidly changing environmental conditions. Behavioral responses to such global perturbations can be used to incorporate interspecific interactions into predictive models of population responses to global change. Flight initiation distance (FID) reflects antipredator behaviour defined as the distance at which an individual takes flight when approached by a human, under standardized conditions. This behavioural trait results from a balance between disturbance, predation risk, food availability and physiological needs, and it is related to geographical range and population trends in European birds. Using 32,145 records of flight initiation distances for 229 bird species during 2006-2019 in 24 European localities, we show that FIDs decreased with increasing temperature and precipitation, as expected if foraging success decreased under warm and humid conditions. Trends were further altered by latitude, urbanisation and body mass, as expected if climate effects on FIDs were mediated by food abundance and need, differing according to position in food webs, supporting foraging models. This provides evidence for a role of behavioural responses within food webs on how bird populations and communities are affected by global change.


Assuntos
Migração Animal , Aves , Mudança Climática , Clima , Animais , Aves/fisiologia , Geografia , Humanos , Dinâmica Populacional
5.
ESMO Open ; 6(3): 100118, 2021 06.
Artigo em Inglês | MEDLINE | ID: mdl-33984678

RESUMO

BACKGROUND: Reliable and affordable prognostic and predictive biomarkers for urothelial carcinoma treated with immunotherapy may allow patients' outcome stratification and drive therapeutic options. The SAUL trial investigated the safety and efficacy of atezolizumab in a real-world setting on 1004 patients with locally advanced or metastatic urothelial carcinoma who progressed to one to three prior systemic therapies. PATIENTS AND METHODS: Using the SAUL Italian cohort of 267 patients, we investigated the prognostic role of neutrophil-to-lymphocyte ratio (NLR) and systemic immune-inflammation index (SII) and the best performing one of these in combination with programmed death-ligand 1 (PD-L1) with or without lactate dehydrogenase (LDH). Previously reported cut-offs (NLR >3 and NLR >5; SII >1375) in addition to study-defined ones derived from receiver operating characteristic (ROC) analysis were used. RESULTS: The cut-off values for NLR and SII by the ROC analysis were 3.65 (sensitivity 60.4; specificity 63.0) and 884 (sensitivity 64.4; specificity 67.5), respectively. The median overall survival (OS) was 14.7 months for NLR <3.65 [95% confidence interval (CI) 9.9-not reached (NR)] versus 6.0 months for NLR ≥3.65 (95% CI 3.9-9.4); 14.7 months for SII <884 (95% CI 10.6-NR) versus 6.0 months for SII ≥884 (95% CI 3.7-8.6). The combination of SII, PD-L1, and LDH stratified OS better than SII plus PD-L1 through better identification of patients with intermediate prognosis (77% versus 48%, respectively). Multivariate analyses confirmed significant correlations with OS and progression-free survival for both the SII + PD-L1 + LDH and SII + PD-L1 combinations. CONCLUSION: The combination of immune-inflammatory biomarkers based on SII, PD-L1, with or without LDH is a potentially useful and easy-to-assess prognostic tool deserving validation to identify patients who may benefit from immunotherapy alone or alternative therapies.


Assuntos
Carcinoma de Células de Transição , Neoplasias Pulmonares , Neoplasias da Bexiga Urinária , Neoplasias Urológicas , Biomarcadores , Humanos , Imunoterapia , Itália , Prognóstico , Neoplasias Urológicas/diagnóstico , Neoplasias Urológicas/terapia
6.
Expert Rev Clin Pharmacol ; 14(2): 261-268, 2021 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-33472450

RESUMO

Background: The RESORT trial showed no longer relapse free survival (RFS) with sorafenib following radical metastasectomy in metastatic renal cell carcinoma. We present the updated 42-month follow-up data.Methods: The phase II RESORT trial randomized patients to sorafenib or observation within 12 weeks from surgery. RFS was the primary endpoint.Results: We analyzed 68 patients (32 in sorafenib and 36 in the observation arm), randomized between November 2012 and November 2017. Eighty-one percent in the sorafenib arm and 80% in the observation arm had one metastasis . At a median follow-up of 42 months (interquartile range 31-58), in the observation arm the median RFS was 35 months, RFS probability was 57% (95% CI 42-76%) at 24 and 44% (95% CI 30-65%) at 48 months. In the sorafenib arm, median RFS was 21 months, RFS probability was 50% (95% CI 34-71%) at 24 and 32% (95% CI 18-57%) at 48 months (p = 0.342;HR 1.35;95% CI 0.72-2.54). Forty-seven percent and 37.5% of the patients in the two arms, respectively, are disease free. The site of relapses was independent of the previous metastasectomy site.Expert commentary: Sorafenib after metastasectomy did not improve RFS, but surgery in selected patients should be considered in order to potentially improve survival.Clinical trial registration: www.clinicaltrials.gov identifier is NCT0144480.


Assuntos
Carcinoma de Células Renais/terapia , Neoplasias Renais/terapia , Metastasectomia/métodos , Sorafenibe/administração & dosagem , Antineoplásicos/administração & dosagem , Carcinoma de Células Renais/patologia , Intervalo Livre de Doença , Seguimentos , Humanos , Neoplasias Renais/patologia , Recidiva Local de Neoplasia , Probabilidade
7.
Med Oncol ; 37(4): 22, 2020 Mar 12.
Artigo em Inglês | MEDLINE | ID: mdl-32166544

RESUMO

Radiofrequency ablation is a minimally invasive procedure alternative to surgery to treat benign thyroid nodules causing compressive symptoms. Tolerability of this procedure, aimed at treatment of benign conditions, is fundamental. In this study, we evaluated if local anesthesia should be enough to reduce both hospital costs and sedation-related risks for the patient, avoiding deep sedation and presence of the anesthesiologist. From July 2017 to August 2018, 14 consecutive patients (mean age 60.1 years) were treated and divided in two groups: Group A (7 patients) underwent systemic sedoanalgesia (intravenous remifentanil/fentanyl ± intravenous midazolam ± intravenous acetaminophen/nonsteroidal anti-inflammatory drugs) + subcutaneous anesthesia (lidocaine), with anesthesiologist. Group B (7 patients) underwent mild systemic sedoanalgesia (oral solution morphine sulfate + intravenous midazolam + intravenous acetaminophen) + both subcutaneous and subcapsular anesthesia (mepivacaine + bupivacaine), without anesthesiologist. Tolerability, sedation grade (Ramsay scale), total opioid dose, complications, and results at 12 months were analyzed and compared. Mean tolerability was 9.4 in group A and 8.9 in group B (p: 0.786). Mean sedation grade was 3.86 in group A and 2.71 in group B (p: 0.016). Mean total opioid dose was 70.9 mg in group A and 10 mg in group B (p:0.00015). No complications were observed. At 12 months, mean volume reduction was 56.1% in the group A and 60% in the group B. In thyroid radiofrequency ablation, subcapsular anesthesia can decrease both total opioid dose and level of patient's sedation without significant differences in tolerability, allowing to perform ablation without the anesthesiologist.


Assuntos
Anestesia/métodos , Ablação por Radiofrequência , Nódulo da Glândula Tireoide/cirurgia , Adulto , Idoso , Idoso de 80 Anos ou mais , Anestesiologistas , Anestésicos/administração & dosagem , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Monitorização Intraoperatória , Resultado do Tratamento
8.
J Mycol Med ; 29(3): 273-277, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-31409527

RESUMO

Following a fatal case of Cryptococcus neoformans meningitis in a child with X-linked hyper-immunoglobulin M syndrome (XHIGM), we evaluated the fungal isolate in an experimental infection in a mouse model with respect to microbiology, epidemiology, virulence and response to therapy. The minimum inhibitory concentrations for antifungals in the susceptibility test were 0.5mg/L for amphotericin B, 4.0mg/L for fluconazole and 0.12mg/L for voriconazole. Evaluation of pathogenicity by means of an experimental infection in BALB/c mice showed that fungus isolated from the blood and cerebrospinal fluid of the child was able to disseminate, reaching the spleen, lungs and brain, where it caused significant macroscopic alterations in the size and texture of each organ. Treatment of infected mice with amphotericin B reduced the fungal load in the spleen and lungs, but not in the brain.


Assuntos
Cryptococcus neoformans/isolamento & purificação , Cryptococcus neoformans/patogenicidade , Síndrome de Imunodeficiência com Hiper-IgM Tipo 1/complicações , Síndrome de Imunodeficiência com Hiper-IgM Tipo 1/microbiologia , Meningite Criptocócica/diagnóstico por imagem , Meningite Criptocócica/microbiologia , Anfotericina B/farmacologia , Animais , Antifúngicos/farmacologia , Pré-Escolar , Cryptococcus neoformans/efeitos dos fármacos , Modelos Animais de Doenças , Evolução Fatal , Humanos , Síndrome de Imunodeficiência com Hiper-IgM Tipo 1/diagnóstico , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Testes de Sensibilidade Microbiana , Tomografia Computadorizada por Raios X
10.
Ann Oncol ; 28(9): 2206-2212, 2017 Sep 01.
Artigo em Inglês | MEDLINE | ID: mdl-28911070

RESUMO

BACKGROUND: Platinum-based chemoradiation (CCRT) is the standard treatment for Locally Advanced Head and Neck Squamous-Cell Carcinoma (LAHNSCC). Cetuximab/RT (CET/RT) is an alternative treatment option to CCRT. The efficacy of induction chemotherapy (IC) followed by chemoradiation compared to chemoradiation alone has not been demonstrated in randomized clinical trials. The goals of this phase II-III trial were to assess: (i) the overall survival (OS) of IC versus no-induction (no-IC) and (ii) the Grade 3-4 in-field mucosal toxicity of CCRT versus CET/RT. The present paper focuses on the analysis of efficacy. MATERIALS AND METHODS: Patients with LAHNSCC were randomized to receive concomitant treatment alone [CCRT (Arm A1) or CET/RT (Arm A2)], or three cycles of induction docetaxel/cisplatin/5 fluorouracil (TPF) followed by CCRT (Arm B1) or followed by CET/RT (Arm B2). The superiority hypothesis of OS comparison of IC versus no-IC (Arms B1 + B2 versus A1 + A2) required 204 deaths to detect an absolute 3-year OS difference of 12% (HR 0.675, with 80% power at two-sided 5% significance level). RESULTS: 414 out of 421 patients were finally analyzed: 206 in the IC and 208 in the no-IC arm. Six patients were excluded because of major violation and one because of metastatic disease at diagnosis. With a median follow-up of 44.8 months, OS was significantly higher in the IC arm (HR 0.74; 95% CI 0.56-0.97; P = 0.031). Complete Responses (P = 0.0028), Progression Free Survival (P = 0.013) and the Loco-regional Control (P = 0.036) were also significantly higher in the IC arm. Compliance to concomitant treatments was not affected by induction TPF. CONCLUSIONS: IC followed by concomitant treatment improved the outcome of patients with LAHNSCC without compromising compliance to the concomitant treatments. The degree of the benefit of IC could be different according to the type of the subsequent concomitant strategy. CLINICAL TRIAL NUMBER: NCT01086826, www.clinicaltrials.gov.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Carcinoma de Células Escamosas/terapia , Neoplasias de Cabeça e Pescoço/terapia , Quimioterapia de Indução , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Escamosas/patologia , Quimiorradioterapia , Cisplatino/administração & dosagem , Feminino , Fluoruracila/administração & dosagem , Neoplasias de Cabeça e Pescoço/patologia , Humanos , Masculino , Pessoa de Meia-Idade , Carcinoma de Células Escamosas de Cabeça e Pescoço , Análise de Sobrevida , Taxoides/administração & dosagem
11.
BMC Cancer ; 16(1): 752, 2016 09 23.
Artigo em Inglês | MEDLINE | ID: mdl-27664126

RESUMO

BACKGROUND: Platinum-based systemic chemotherapy is considered the backbone for management of advanced urothelial carcinomas. However there is a lack of real world data on the use of such chemotherapy regimens, on patient profiles and on management after treatment failure. METHODS: Fifty-one randomly selected physicians from 4 European countries registered 218 consecutive patients in progression or relapse following a first platinum-based chemotherapy. Patient characteristics, tumor history and treatment regimens, as well as the considerations of physicians on the management of urothelial carcinoma were recorded. RESULTS: A systemic platinum-based regimen had been administered as the initial chemotherapy in 216 patients: 15 in the neoadjuvant setting, 61 in adjuvant therapy conditions, 137 in first-line advanced setting and 3 in other conditions. Of these patients, 76 (35 %) were initially considered as cisplatin-unfit, mainly because of renal impairment (52 patients). After platinum failure, renal impairment was observed in 44 % of patients, ECOG Performance Status ≥ 2 in 17 %, hemoglobinemia < 10 g/dL in 16 %, hepatic metastases in 13 %. 80 % of these patients received further anticancer therapy. Immediately after failure of adjuvant/neoadjuvant chemotherapy, most subsequent anticancer treatments were chemotherapy doublets (35/58), whereas after therapy failure in the advanced setting most patients receiving further anticancer drugs were treated with a single agent (80/114). After first progression to chemotherapy, treatment decisions were mainly driven by Performance Status and prior response to chemotherapy (>30 % patients). The most frequent all-settings second anticancer therapy regimen was vinflunine (70 % of single-agent and 42 % of all subsequent treatments), the main reasons evoked by physicians (>1 out of 4) being survival benefit, safety and phase III evidence. CONCLUSION: In this daily practice experience, a majority of patients with urothelial carcinoma previously treated with a platinum-based therapy received a second chemotherapy regimen, most often a single agent after an initial chemotherapy in the advanced setting and preferably a cytotoxic combination after a neoadjuvant or adjuvant chemotherapy. Performance Status and prior response to chemotherapy were the main drivers of further treatment decisions.


Assuntos
Anemia/epidemiologia , Nefropatias/epidemiologia , Neoplasias Hepáticas/epidemiologia , Platina/uso terapêutico , Neoplasias da Bexiga Urinária/tratamento farmacológico , Urotélio/patologia , Idoso , Idoso de 80 Anos ou mais , Progressão da Doença , Europa (Continente)/epidemiologia , Feminino , Humanos , Neoplasias Hepáticas/secundário , Masculino , Metástase Neoplásica , Guias de Prática Clínica como Assunto , Falha de Tratamento , Neoplasias da Bexiga Urinária/complicações , Neoplasias da Bexiga Urinária/patologia
13.
Cell Death Dis ; 6: e1854, 2015 Aug 13.
Artigo em Inglês | MEDLINE | ID: mdl-26270349

RESUMO

Excitotoxicity following cerebral ischemia elicits a molecular cascade, which leads to neuronal death. c-Jun-N-terminal kinase (JNK) has a key role in excitotoxic cell death. We have previously shown that JNK inhibition by a specific cell-permeable peptide significantly reduces infarct size and neuronal death in an in vivo model of cerebral ischemia. However, systemic inhibition of JNK may have detrimental side effects, owing to blockade of its physiological function. Here we designed a new inhibitor peptide (growth arrest and DNA damage-inducible 45ß (GADD45ß-I)) targeting mitogen-activated protein kinase kinase 7 (MKK7), an upstream activator of JNK, which exclusively mediates JNK's pathological activation. GADD45ß-I was engineered by optimizing the domain of the GADD45ß, able to bind to MKK7, and by linking it to the TAT peptide sequence, to allow penetration of biological membranes. Our data clearly indicate that GADD45ß-I significantly reduces neuronal death in excitotoxicity induced by either N-methyl-D-aspartate exposure or by oxygen-glucose deprivation in vitro. Moreover, GADD45ß-I exerted neuroprotection in vivo in two models of ischemia, obtained by electrocoagulation and by thromboembolic occlusion of the middle cerebral artery (MCAo). Indeed, GADD45ß-I reduced the infarct size when injected 30 min before the lesion in both models. The peptide was also effective when administrated 6 h after lesion, as demonstrated in the electrocoagulation model. The neuroprotective effect of GADD45ß-I is long lasting; in fact, 1 week after MCAo the infarct volume was still reduced by 49%. Targeting MKK7 could represent a new therapeutic strategy for the treatment of ischemia and other pathologies involving MKK7/JNK activation. Moreover, this new inhibitor can be useful to further dissect the physiological and pathological role of the JNK pathway in the brain.


Assuntos
Infarto da Artéria Cerebral Média/tratamento farmacológico , MAP Quinase Quinase 7/antagonistas & inibidores , Neurônios/efeitos dos fármacos , Fármacos Neuroprotetores/farmacologia , Peptídeos/farmacologia , Sequência de Aminoácidos , Animais , Animais Recém-Nascidos , Antígenos de Diferenciação/química , Antígenos de Diferenciação/genética , Antígenos de Diferenciação/metabolismo , Hipóxia Celular , Córtex Cerebral/efeitos dos fármacos , Córtex Cerebral/metabolismo , Córtex Cerebral/patologia , Eletrocoagulação , Regulação da Expressão Gênica , Glucose/toxicidade , Infarto da Artéria Cerebral Média/genética , Infarto da Artéria Cerebral Média/metabolismo , Infarto da Artéria Cerebral Média/patologia , Proteínas Quinases JNK Ativadas por Mitógeno/genética , Proteínas Quinases JNK Ativadas por Mitógeno/metabolismo , MAP Quinase Quinase 7/química , MAP Quinase Quinase 7/genética , MAP Quinase Quinase 7/metabolismo , Masculino , Simulação de Acoplamento Molecular , Dados de Sequência Molecular , N-Metilaspartato/toxicidade , Neurônios/metabolismo , Neurônios/patologia , Fármacos Neuroprotetores/síntese química , Peptídeos/síntese química , Cultura Primária de Células , Engenharia de Proteínas , Ratos , Ratos Sprague-Dawley , Transdução de Sinais , Tromboembolia , Técnicas de Cultura de Tecidos
14.
Neth J Med ; 73(6): 296-8, 2015 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-26228196

RESUMO

Melioidosis is due to Burkholderia pseudomallei and is known to be endemic in South-East Asia, while epidemiology of disease in Sub-Saharan Africa is still unclear. Prompt recognition of infection is crucial for adequate antibiotic treatment. Infection can lead to visceral abcesses and awareness of this complication is important for proper management.


Assuntos
Burkholderia pseudomallei/isolamento & purificação , Doenças Endêmicas , Melioidose/complicações , Insuficiência Renal/etiologia , Dinamarca/epidemiologia , Gâmbia/etnologia , Humanos , Masculino , Melioidose/etnologia , Melioidose/microbiologia , Pessoa de Meia-Idade , Insuficiência Renal/etnologia , Viagem
15.
Ann Oncol ; 26(10): 2107-13, 2015 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-26216384

RESUMO

BACKGROUND: First-line sunitinib is recommended in metastatic renal cell carcinoma (mRCC), but it is frequently associated with relevant toxicities and subsequent dose reductions. Alternative schedules, such as 2-week-on treatment and 1-week-off (2/1 schedule), might improve tolerability. We evaluated the safety and outcomes of this schedule in a large multicenter analysis. PATIENTS AND METHODS: Retrospective, multicenter analysis of mRCC patients treated with first-line sunitinib on a 2/1 schedule. Data of 249 patients were reviewed: 208 cases who started sunitinib on the 4/2 schedule (full dosage: 188/208, 90.4%) and thereafter switched to the 2/1 schedule for toxicity (group 4/2 → 2/1) and 41 patients who started first-line sunitinib with the 2/1 schedule because of suboptimal clinical conditions (group 2/1). A total of 211 consecutive patients treated with the 4/2 schedule in another institution served as external controls. Safety was the primary end point. Treatment duration (TD), progression-free survival (PFS) and overall survival (OS) were also analyzed. RESULTS: In group 4/2 → 2/1, the overall incidence of grade ≥ 3 toxicities was significantly reduced (from 45.7% to 8.2%, P < 0.001) after the switch to 2/1 schedule. This advantage was maintained also in the 106/188 cases (56.4%) who maintained the full dosage. Fatigue, hypertension, hand-foot syndrome and thrombocytopenia were less frequent. The incidence of grade ≥ 3 adverse events in the negatively selected group 2/1 (only 73.2% starting at full dose) was 26.8%, similar to what observed in the external control group (29.4%). Median TD was 28.2 months in the 4/2 → 2/1 group (total time spent with both schedules), 7.8 months in the 2/1 group and 9.7 months in external controls. Median PFS was 30.2, 10.4 and 9.7 months, respectively. Median OS was not reached, 23.2 and 27.8 months, respectively. CONCLUSIONS: mRCC patients who moved to a modified 2/1 schedule of sunitinib experience an improved safety profile compared with that observed during the initial 4/2 schedule.


Assuntos
Neoplasias Ósseas/tratamento farmacológico , Carcinoma Papilar/tratamento farmacológico , Carcinoma de Células Renais/tratamento farmacológico , Indóis/uso terapêutico , Neoplasias Renais/tratamento farmacológico , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Pulmonares/tratamento farmacológico , Pirróis/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico , Neoplasias Ósseas/mortalidade , Neoplasias Ósseas/secundário , Carcinoma Papilar/mortalidade , Carcinoma Papilar/patologia , Carcinoma de Células Renais/mortalidade , Carcinoma de Células Renais/patologia , Feminino , Seguimentos , Humanos , Neoplasias Renais/mortalidade , Neoplasias Renais/patologia , Neoplasias Hepáticas/mortalidade , Neoplasias Hepáticas/secundário , Neoplasias Pulmonares/mortalidade , Neoplasias Pulmonares/secundário , Masculino , Pessoa de Meia-Idade , Estadiamento de Neoplasias , Prognóstico , Estudos Retrospectivos , Sunitinibe , Taxa de Sobrevida
17.
Cell Death Differ ; 21(12): 1838-51, 2014 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-25034784

RESUMO

Stress granules (SGs) are mRNA-protein aggregates induced during stress, which accumulate in many neurodegenerative diseases. Previously, the autophagy-lysosome pathway and valosin-containing protein (VCP), key players of the protein quality control (PQC), were shown to regulate SG degradation. This is consistent with the idea that PQC may survey and/or assist SG dynamics. However, despite these observations, it is currently unknown whether the PQC actively participates in SG assembly. Here, we describe that inhibition of autophagy, lysosomes and VCP causes defective SG formation after induction. Silencing the VCP co-factors UFD1L and PLAA, which degrade defective ribosomal products (DRIPs) and 60S ribosomes, also impaired SG assembly. Intriguingly, DRIPs and 60S, which are released from disassembling polysomes and are normally excluded from SGs, were significantly retained within SGs in cells with impaired autophagy, lysosome or VCP function. Our results suggest that deregulated autophagy, lysosomal or VCP activities, which occur in several neurodegenerative (VCP-associated) diseases, may alter SG morphology and composition.


Assuntos
Adenosina Trifosfatases/fisiologia , Autofagia , Proteínas de Ciclo Celular/fisiologia , Grânulos Citoplasmáticos/metabolismo , Lisossomos/enzimologia , Técnicas de Silenciamento de Genes , Células HeLa , Humanos , Proteínas Ribossômicas/metabolismo , Proteína com Valosina
18.
Transpl Infect Dis ; 15(3): E111-4, 2013 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23581282

RESUMO

Invasive disease caused by Streptococcus pneumoniae is a major cause of morbidity and mortality in high-risk individuals with severe comorbidities, including asplenia, chronic alcoholism, and altered immune status. The risk of invasive pneumococcal disease has been significantly higher in transplant patients compared with the general population. Here, we report an unusual case of a disseminated pneumococcal infection with meningitis, endocarditis, spondylodiscitis, and muscle abscess in an asplenic patient on chronic immunosuppressive therapy for liver transplantation performed 17 years before.


Assuntos
Discite/microbiologia , Endocardite Bacteriana/diagnóstico por imagem , Endocardite Bacteriana/microbiologia , Transplante de Fígado/efeitos adversos , Meningite Pneumocócica/microbiologia , Infecções Pneumocócicas/complicações , Streptococcus pneumoniae/isolamento & purificação , Idade de Início , Encéfalo/diagnóstico por imagem , Discite/líquido cefalorraquidiano , Discite/diagnóstico por imagem , Endocardite Bacteriana/líquido cefalorraquidiano , Feminino , Humanos , Vértebras Lombares/patologia , Imageamento por Ressonância Magnética , Meningite Pneumocócica/líquido cefalorraquidiano , Meningite Pneumocócica/diagnóstico por imagem , Pessoa de Meia-Idade , Infecções Pneumocócicas/líquido cefalorraquidiano , Infecções Pneumocócicas/microbiologia , Radiografia , Ultrassonografia
19.
Med Oncol ; 29(3): 1908-13, 2012 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-21858552

RESUMO

To investigate the sequential use of two tyrosine-kinase inhibitors (TKI), sorafenib (SOR) and sunitinib (SUN), in advanced renal carcinoma. We retrospectively analyzed the clinical outcome of 33 patients who had experienced progression or unacceptable toxicity after receiving either sorafenib or sunitinib and then switched to the other reciprocal agent. Progression-free survival (PFS) during the first TKI was similar regardless of drug with a median of 6 months in the SOR-SUN group (n = 15) and 7.5 months in the SUN-SOR group (n = 18). Interestingly, PFS during the second TKI was significantly longer in the SOR-SUN group as compared to the SUN-SOR group with median values of 11 and 3 months, respectively (P = 0.0377; HR 0.46; 95% CI: 0.16-0.95). As a consequence, total PFS (sum of PFS on first and second TKI) was significantly longer in the SOR-SUN group than in the SUN-SOR group with medians of 20 versus 10 months, respectively (P = 0.0393; HR 0.47; 95% CI: 0.18-0.96). Median wash-out period between the two TKI was 3 weeks in both groups. Differences in baseline characteristics, including histology and line of treatment, were not significant, and toxicity was not increased during the second part of the sequence. Here, we show that responses can be achieved when a second TKI is given soon after a TKI failure in renal cancer with apparent more durable disease control when SOR is followed by SUN.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Carcinoma de Células Renais/tratamento farmacológico , Indóis/administração & dosagem , Neoplasias Renais/tratamento farmacológico , Niacinamida/análogos & derivados , Compostos de Fenilureia/administração & dosagem , Pirróis/administração & dosagem , Idoso , Carcinoma de Células Renais/mortalidade , Intervalo Livre de Doença , Feminino , Humanos , Estimativa de Kaplan-Meier , Neoplasias Renais/mortalidade , Masculino , Pessoa de Meia-Idade , Niacinamida/administração & dosagem , Estudos Retrospectivos , Sorafenibe , Sunitinibe
20.
Ann Oncol ; 23(1): 59-64, 2012 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-21460378

RESUMO

BACKGROUND: 2-¹8fluoro-deoxy-D-glucose positron emission tomography (FDG-PET) has been recommended in international guidelines in the evaluation of postchemotherapy seminoma residuals. Our trial was designed to validate these recommendations in a larger group of patients. PATIENTS AND METHODS: FDG-PET studies in patients with metastatic seminoma and residual masses after platinum-containing chemotherapy were correlated with either the histology of the resected lesion(s) or the clinical outcome. RESULTS: One hundred and seventy seven FDG-PET results were contributed. Of 127 eligible PET studies, 69% were true negative, 11% true positive, 6% false negative, and 15% false positive. We compared PET scans carried out before and after a cut-off level of 6 weeks after the end of the last chemotherapy cycle. PET sensitivity, specificity, negative predictive value (NPV), and positive predictive value were 50%, 77%, 91%, and 25%, respectively, before the cut-off and 82%, 90%, 95%, and 69% after the cut-off. PET accuracy significantly improved from 73% before to 88% after the cut-off (P=0.032). CONCLUSION: Our study confirms the high specificity, sensitivity, and NPV of FDG-PET for evaluating postchemotherapy seminoma residuals. When carried out at an adequate time point, FDG-PET remains a valuable tool for clinical decision-making in this clinical setting and spares patients unnecessary therapy.


Assuntos
Glucose-6-Fosfato/análogos & derivados , Tomografia por Emissão de Pósitrons , Compostos Radiofarmacêuticos , Seminoma/diagnóstico por imagem , Neoplasias Testiculares/diagnóstico por imagem , Humanos , Masculino , Estudos Retrospectivos , Sensibilidade e Especificidade
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