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1.
JAMA ; 2024 Aug 22.
Artigo em Inglês | MEDLINE | ID: mdl-39172446

RESUMO

Importance: Safe and effective nonhormonal treatments for menopausal vasomotor symptoms (VMS) are needed. Objective: To evaluate the efficacy and safety of elinzanetant, a selective neurokinin-1,3 receptor antagonist, for the treatment of moderate to severe menopausal vasomotor symptoms. Design, Setting, and Participants: Two randomized double-blind phase 3 trials (OASIS 1 and 2) included postmenopausal participants aged 40 to 65 years experiencing moderate to severe vasomotor symptoms (OASIS 1: 77 sites in the US, Europe, and Israel from August 27, 2021, to November 27, 2023, and OASIS 2: 77 sites in the US, Canada, and Europe from October 29, 2021, to October 10, 2023). Intervention: Once daily oral elinzanetant, 120 mg, for 26 weeks or matching placebo for 12 weeks followed by elinzanetant, 120 mg, for 14 weeks. Main Outcomes and Measures: Primary end points included mean change in frequency and severity of moderate to severe vasomotor symptoms from baseline to weeks 4 and 12, measured by the electronic hot flash daily diary. Secondary end points included Patient-Reported Outcomes Measurement Information System Sleep Disturbance Short Form 8b total T score and Menopause-Specific Quality of Life questionnaire total score from baseline to week 12. Results: Eligible participants (mean [SD] age, OASIS 1: 54.6 [4.9] years; OASIS 2: 54.6 [4.8] years) were randomized to elinzanetant (OASIS 1: n = 199; OASIS 2: n = 200) or placebo (OASIS 1: n = 197; OASIS 2: n = 200). A total of 309 (78.0%) and 324 (81.0%) completed OASIS 1 and 2, respectively. For the elinzanetant and placebo groups, the baseline mean (SD) VMS per 24 hours were 13.4 (6.6) vs 14.3 (13.9) (OASIS 1) and 14.7 (11.1) v 16.2 (11.2) (OASIS 2). Baseline VMS severity was 2.6 (0.2) vs 2.5 (0.2) (OASIS 1) and 2.5 (0.2) vs 2.5 (0.2) (OASIS 2). Elinzanetant significantly reduced VMS frequency at week 4 (OASIS 1: -3.3 [95% CI, -4.5 to -2.1], P < .001; OASIS 2: -3.0 [95% CI, -4.4 to -1.7], P < .001) and at week 12 (OASIS 1: -3.2 [95% CI, -4.8 to -1.6], P < .001; OASIS 2: -3.2 [95% CI, -4.6 to -1.9], P < .001). Elinzanetant also improved VMS severity at week 4 (OASIS 1: -0.3 [95% CI, -0.4 to -0.2], P < .001; OASIS 2: -0.2 [95 CI, -0.3 to -0.1], P < .001) and week 12 (OASIS 1: -0.4 [95% CI, -0.5 to -0.3], P < .001; OASIS 2: -0.3 [95% CI, -0.4 to -0.1], P < .001). Elinzanetant improved sleep disturbances and menopause-related quality of life at week 12, and the safety profile was favorable. Conclusions and Relevance: Elinzanetant was well tolerated and efficacious for moderate to severe menopausal VMS. Trial Registration: ClinicalTrials.gov Identifier: OASIS 1: NCT05042362, OASIS 2: NCT05099159.

2.
Lung ; 201(3): 255-266, 2023 06.
Artigo em Inglês | MEDLINE | ID: mdl-37261531

RESUMO

INTRODUCTION: The PAGANINI study evaluated the efficacy and safety of the selective P2X3 antagonist eliapixant in patients with refractory chronic cough (RCC). METHODS: PAGANINI was a randomized, double-blind, parallel-group, placebo-controlled, multicenter, dose-finding, phase 2b study. Adults with RCC lasting ≥ 12 months and cough severity ≥ 40 mm on a visual analog scale at screening were enrolled. Participants were randomized 1:1:1:1 to twice-daily 25 mg, 75 mg, or 150 mg oral eliapixant or placebo for 12 weeks. The primary endpoint was change from baseline in 24-h cough count after 12 weeks of intervention. RESULTS: Overall, 310 participants were randomized to twice-daily eliapixant 25 mg (n = 75), 75 mg (n = 78), 150 mg (n = 80), or placebo (n = 77). A statistically significant dose-response signal with eliapixant was detected for the primary endpoint (all dose-response models, adjusted p < 0.1; one-sided). Adverse events (AEs) were reported in 39 (51%) participants with placebo and 43-51 (57-65%) participants receiving eliapixant. The most common AE was dysgeusia, occurring in 1% (n = 1) of the placebo group and 1-16% (n = 1-13) of the eliapixant groups in a dose-related manner. One case of a moderate drug-induced liver injury occurred in a participant receiving 150 mg twice-daily eliapixant. CONCLUSION: Eliapixant demonstrated efficacy and a favorable taste tolerability profile in RCC. However, a drug-induced liver injury contributed to intensified liver monitoring in clinical trials with eliapixant and discontinuation of the entire development program in all indications by Bayer AG. TRIAL REGISTRATION: ClinicalTrials.gov identifier NCT04562155; registered September 18, 2020.


Assuntos
Carcinoma de Células Renais , Neoplasias Renais , Adulto , Humanos , Tosse/tratamento farmacológico , Método Duplo-Cego , Resultado do Tratamento
3.
Pituitary ; 22(5): 542-551, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31440946

RESUMO

PURPOSE: Clinical trials have demonstrated the favorable efficacy/safety profile of pasireotide in patients with Cushing's disease (CD). We report interim long-term results of an ongoing real-world evidence study of subcutaneous pasireotide in patients with CD. METHODS: Adults with CD receiving pasireotide, initiated before (prior-use) or at study entry (new-use), were monitored for ≤ 3 years during a multicenter observational study ( http://clinicaltrials.gov identifier NCT02310269). Primary objective was to assess long-term safety of pasireotide alone or with other CD therapies. RESULTS: At the time of this interim analysis, 127 patients had received pasireotide (new-use, n = 31; prior-use, n = 96). Eight patients had completed the 3-year observation period, 53 were ongoing, and 66 had discontinued. Among 31 new-use and 92 prior-use patients with ≥ 1 safety assessment, respectively: 24 (77%) and 37 (40%) had drug-related adverse events (AEs); 7 (23%) and 10 (11%) had serious drug-related AEs. Most common drug-related AEs were nausea (14%), hyperglycemia (11%) and diarrhea (11%); these were more frequently reported in new users and mostly of mild-to-moderate severity. 14 (45%) new-use and 15 (16%) prior-use patients experienced hyperglycemia-related AEs. Mean urinary free cortisol (mUFC) was within normal range at baseline and months 1, 12 and 24, respectively, in: 1/16 (6%), 9/18 (50%), 1/3 (33%) and 0/0 new users; 28/43 (65%), 15/27 (56%), 27/33 (82%) and 12/19 (63%) prior users. CONCLUSIONS: Pasireotide is well tolerated and provides sustained reductions in mUFC during real-world treatment of CD. The lower rate of hyperglycemia-related AEs in prior users suggests that hyperglycemia tends not to deteriorate if effectively managed soon after onset. CLINICAL TRIAL REGISTRATION NUMBER: NCT02310269.


Assuntos
Hipersecreção Hipofisária de ACTH/tratamento farmacológico , Somatostatina/análogos & derivados , Adulto , Feminino , Humanos , Hiperglicemia/fisiopatologia , Masculino , Pessoa de Meia-Idade , Estudos Multicêntricos como Assunto , Hipersecreção Hipofisária de ACTH/fisiopatologia , Somatostatina/efeitos adversos , Somatostatina/uso terapêutico , Resultado do Tratamento
5.
Behav Res Methods ; 47(1): 216-27, 2015 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-24570335

RESUMO

Pain thresholds are widely used in behavioral research, but unlike other pain modalities, a standardized assessment of pressure pain remains a challenge. In this research, we describe the application of an automatic pressure algometer with a linear increase in force. Ergonomically designed fixation devices were developed to increase the accuracy and to shorten the time of each measurement. Ten healthy volunteers were included in a pilot study to test the algometry method. Pressure pain thresholds (PPTs) were investigated over 2 experimental days in three nonconsecutive runs at 29 measurement sites. During the experiment, subjects reported their subjective sleepiness, level of state-anxiety, psychological status and the perceived pain intensity of each measurement. Pain intensity ratings indicate that instructions were followed. State-anxiety and subjective sleepiness levels were low throughout the experiment. The method has proven to be suitable for standardized PPT measurements across the body in an ergonomic, safe, and user-friendly fashion.


Assuntos
Limiar da Dor , Dor , Pressão/efeitos adversos , Adulto , Ansiedade/diagnóstico , Ansiedade/etiologia , Pesquisa Comportamental/métodos , Pesquisa Comportamental/normas , Feminino , Voluntários Saudáveis , Humanos , Masculino , Dor/diagnóstico , Dor/etiologia , Medição da Dor/instrumentação , Medição da Dor/métodos , Medição da Dor/normas , Limiar da Dor/fisiologia , Limiar da Dor/psicologia , Estimulação Física/instrumentação , Estimulação Física/métodos , Projetos Piloto , Padrões de Referência , Reprodutibilidade dos Testes
6.
Magn Reson Med ; 71(6): 2215-23, 2014 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-23821350

RESUMO

PURPOSE: Magnetic resonance imaging (MRI)-based techniques for assessing liver iron concentration (LIC) have been limited by single scanner calibration against biopsy. Here, the calibration of spin-density projection-assisted (SDPA) R2-MRI (FerriScan®) in iron-overloaded ß-thalassemia patients treated with the iron chelator, deferasirox, for 12 months is validated. METHODS: SDPA R2-MRI measurements and percutaneous needle liver biopsy samples were obtained from a subgroup of patients (n = 233) from the ESCALATOR trial. Five different makes and models of scanner were used in the study. RESULTS: LIC, derived from mean of MRI- and biopsy-derived values, ranged from 0.7 to 50.1 mg Fe/g dry weight. Mean fractional differences between SDPA R2-MRI- and biopsy-measured LIC were not significantly different from zero. They were also not significantly different from zero when categorized for each of the Ishak stages of fibrosis and grades of necroinflammation, for subjects aged 3 to <8 versus ≥8 years, or for each scanner model. Upper and lower 95% limits of agreement between SDPA R2-MRI and biopsy LIC measurements were 74 and -71%. CONCLUSION: The calibration curve appears independent of scanner type, patient age, stage of liver fibrosis, grade of necroinflammation, and use of deferasirox chelation therapy, confirming the clinical usefulness of SDPA R2-MRI for monitoring iron overload.


Assuntos
Sobrecarga de Ferro/diagnóstico , Fígado/metabolismo , Imageamento por Ressonância Magnética/métodos , Adolescente , Adulto , Benzoatos/uso terapêutico , Biópsia por Agulha , Calibragem , Terapia por Quelação/métodos , Criança , Pré-Escolar , Deferasirox , Feminino , Humanos , Ferro/metabolismo , Quelantes de Ferro/uso terapêutico , Sobrecarga de Ferro/tratamento farmacológico , Masculino , Estudos Prospectivos , Resultado do Tratamento , Triazóis/uso terapêutico
7.
BMC Med Res Methodol ; 14: 131, 2014 Dec 16.
Artigo em Inglês | MEDLINE | ID: mdl-25510877

RESUMO

BACKGROUND: In network meta-analysis, several alternative treatments can be compared by pooling the evidence of all randomised comparisons made in different studies. Incorporated indirect conclusions require a consistent network of treatment effects. An assessment of this assumption and of the influence of deviations is fundamental for the validity evaluation. METHODS: We show that network estimates for single pairwise treatment comparisons can be approximated by the evidence of a subnet that is decomposable into independent paths. Path-based estimates and the estimate of the residual evidence can be used with their contribution to the network estimate to set up a forest plot for the consistency assessment. Using a network meta-analysis of twelve antidepressants and controlled perturbations in the real and constructed consistent data, we discuss the consistency assessment by the independent path decomposition in contrast to an approach using a recently presented graphical tool, the net heat plot. In addition, we define influence functions that describe how changes in study effects are translated into network estimates. RESULTS: While the consistency assessment by the net heat plot comprises all network estimates, an independent path decomposition and visualisation in a forest plot is tailored to one specific treatment comparison. It allows for the recognition as to whether inconsistencies between different paths of evidence and outlier effects do affect the considered treatment comparison. CONCLUSIONS: The approximation of the network estimate for a single comparison by the evidence of a subnet and the visualisation of the decomposition into independent paths provide the applicability of a graphical validation instrument that is known from classical meta-analysis.


Assuntos
Antidepressivos/uso terapêutico , Sistemas de Apoio a Decisões Clínicas/estatística & dados numéricos , Projetos de Pesquisa/estatística & dados numéricos , Humanos , Metanálise como Assunto , Estatística como Assunto , Resultado do Tratamento
8.
Lancet Haematol ; 11(3): e206-e215, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38335978

RESUMO

BACKGROUND: Antithymocyte globulin (ATG)-based immunosuppression is standard in front-line treatment for people with severe aplastic anaemia without a histocompatible donor or who are 40 years or older. However, ATG requires in-hospital administration, is associated with infusion-related toxicities and has limited availability worldwide. In this study, we investigated the activity and safety of an ATG-free regimen of eltrombopag with cyclosporin A as a potential treatment for patients with severe aplastic anaemia who might not have access to or cannot tolerate horse-ATG. METHODS: SOAR was a multicentre, single-arm phase 2 trial investigating eltrombopag and cyclosporin in adult (≥18 years) patients with severe aplastic anaemia who were treatment-naive and had an Eastern Cooperative Oncology Group performance status of less than 2. Participants were recruited from 20 hospitals in ten countries. Eltrombopag was initiated at 150 mg (100 mg in patients of Asian ethnicity) and cyclosporin at 10 mg/kg per day (adjusted to a trough of 200-400 µg/L) orally from day 1 to 6 months. The primary outcome was an overall haematological response rate by 6 months in the intention-to-treat population. This is the final report of the primary analysis period. The trial was registered with ClinicalTrials.gov, NCT02998645, and has been completed. FINDINGS: 54 patients were enrolled between May 11, 2017, and March 23, 2020. 34 (63%) patients were male and 20 (37%) were female. 22 (41%) were Asian, 22 (41%) were White, one (2%) was Native American or Alaska Native, one (2%) was Black or African American, and eight (15%) were other race or ethnicity. 35 patients (65%) completed 6 months of treatment with eltrombopag and cyclosporin and six (11%) completed the cyclosporin tapering period up to month 24. Overall haematological response rate by month 6 of treatment was 46% (25 of 54; 95% CI 33-60). The most reported adverse events were increased serum bilirubin (in 22 patients [41%]), nausea (16 [30%]), increased alanine aminotransferase concentration (12 [22%]), and diarrhoea (12 [22%]). Eight patients died on-treatment, but no deaths were considered related to the treatment. INTERPRETATION: Eltrombopag and cyclosporin was active as front-line treatment of severe aplastic anaemia, with no unexpected safety concerns. This approach might be beneficial where horse-ATG is not available or not tolerated. FUNDING: Novartis Pharmaceuticals.


Assuntos
Anemia Aplástica , Ciclosporina , Pirazóis , Adulto , Feminino , Humanos , Masculino , Anemia Aplástica/tratamento farmacológico , Soro Antilinfocitário/uso terapêutico , Benzoatos , Ciclosporina/uso terapêutico , Hidrazinas , Pirazóis/uso terapêutico , Quimioterapia Combinada/efeitos adversos
9.
Stat Med ; 32(30): 5414-29, 2013 Dec 30.
Artigo em Inglês | MEDLINE | ID: mdl-24123165

RESUMO

Network meta-analysis techniques allow for pooling evidence from different studies with only partially overlapping designs for getting a broader basis for decision support. The results are network-based effect estimates that take indirect evidence into account for all pairs of treatments. The results critically depend on homogeneity and consistency assumptions, which are sometimes difficult to investigate. To support such evaluation, we propose a display of the flow of evidence and introduce new measures that characterize the structure of a mixed treatment comparison. Specifically, a linear fixed effects model for network meta-analysis is considered, where the network estimates for two treatments are linear combinations of direct effect estimates comparing these or other treatments. The linear coefficients can be seen as the generalization of weights known from classical meta-analysis. We summarize properties of these coefficients and display them as a weighted directed acyclic graph, representing the flow of evidence. Furthermore, measures are introduced that quantify the direct evidence proportion, the mean path length, and the minimal parallelism of mixed treatment comparisons. The graphical display and the measures are illustrated for two published network meta-analyses. In these applications, the proposed methods are seen to render transparent the process of data pooling in mixed treatment comparisons. They can be expected to be more generally useful for guiding and facilitating the validity assessment in network meta-analysis.


Assuntos
Medicina Baseada em Evidências/métodos , Modelos Lineares , Metanálise como Assunto , Ensaios Clínicos Controlados Aleatórios como Assunto , Projetos de Pesquisa , Resultado do Tratamento , Antidepressivos/uso terapêutico , Depressão/tratamento farmacológico , Humanos , Abandono do Hábito de Fumar/métodos
10.
BMC Med Res Methodol ; 13: 35, 2013 Mar 09.
Artigo em Inglês | MEDLINE | ID: mdl-23496991

RESUMO

BACKGROUND: In network meta-analyses, several treatments can be compared by connecting evidence from clinical trials that have investigated two or more treatments. The resulting trial network allows estimating the relative effects of all pairs of treatments taking indirect evidence into account. For a valid analysis of the network, consistent information from different pathways is assumed. Consistency can be checked by contrasting effect estimates from direct comparisons with the evidence of the remaining network. Unfortunately, one deviating direct comparison may have side effects on the network estimates of others, thus producing hot spots of inconsistency. METHODS: We provide a tool, the net heat plot, to render transparent which direct comparisons drive each network estimate and to display hot spots of inconsistency: this permits singling out which of the suspicious direct comparisons are sufficient to explain the presence of inconsistency. We base our methods on fixed-effects models. For disclosure of potential drivers, the plot comprises the contribution of each direct estimate to network estimates resulting from regression diagnostics. In combination, we show heat colors corresponding to the change in agreement between direct and indirect estimate when relaxing the assumption of consistency for one direct comparison. A clustering procedure is applied to the heat matrix in order to find hot spots of inconsistency. RESULTS: The method is shown to work with several examples, which are constructed by perturbing the effect of single study designs, and with two published network meta-analyses. Once the possible sources of inconsistencies are identified, our method also reveals which network estimates they affect. CONCLUSION: Our proposal is seen to be useful for identifying sources of inconsistencies in the network together with the interrelatedness of effect estimates. It opens the way for a further analysis based on subject matter considerations.


Assuntos
Redes de Comunicação de Computadores , Gráficos por Computador , Metanálise como Assunto , Humanos
11.
Acta Odontol Scand ; 71(6): 1579-87, 2013 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-23627845

RESUMO

OBJECTIVES: The present in-vitro study examined the effects of different biomaterials on early root surface colonization by human periodontal ligament (PDL) fibroblasts using confocal-laser-scanning-microscopy (CLSM). MATERIALS AND METHODS: Fifteen periodontally-diseased teeth were extracted, treated with scaling/root planing and longitudinally cut to obtain 30 root fragments. Fragments were treated either with 24% EDTA following application of enamel matrix derivative (EMD), 24% EDTA or EMD only, nanocrystalline hydroxyapatite (NHA) paste or oily calcium hydroxide suspension (OCHS) for 1 h each. The analogue untreated root specimens served as controls. Root fragments were incubated with human PDL fibroblasts and cellular proliferation and morphology were evaluated after 1, 3, 5 and 8 days using CLSM-visualization and image recognition software. RESULTS: The rate of cellular proliferation was different among treatment modalities examined (p = 0.019). Except treatment with NHA paste all treatment modalities improved cellular proliferation on root surfaces at all different points of time compared with the control specimens. A significant difference between treatment modalities was observed between EMD and NHA paste (p = 0.008). No synergistic effect could be demonstrated comparing root surface conditioning with 24% EDTA and EMD application compared to 24% EDTA or EMD application only. CONCLUSION: The present results suggest that initial root surface colonization by PDL fibroblasts may be enhanced by root surface conditioning with 24% EDTA and application of EMD, application of 24% EDTA or EMD alone and OCHS. The addition of 24% EDTA for root surface conditioning prior to EMD application provided no synergistic effects in terms of early root surface colonization by PDL fibroblasts.


Assuntos
Materiais Biocompatíveis , Ligamento Periodontal/citologia , Raiz Dentária/microbiologia , Fibroblastos/citologia , Humanos , Microscopia Confocal
12.
Eur J Haematol ; 87(4): 349-54, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21668501

RESUMO

This analysis evaluated the effects of deferasirox on liver iron concentration in moderate and heavily iron-overloaded patients with ß-thalassaemia from the ESCALATOR trial (n = 231). Mean liver iron concentrations (LIC) decreased significantly from 21.1 ± 8.2 to 14.2 ± 12.1 mg Fe/g dry weight (dw) at 2 yr (P < 0.001) in patients with LIC ≥ 7 mg Fe/g dw at baseline; patients with LIC < 7 mg Fe/g dw maintained these levels over the treatment period. The proportion of patients with LIC < 7 mg Fe/g dw increased from 9.4% at core baseline to 39.3% by the end of year 2. The results showed that deferasirox enabled therapeutic goals to be achieved, by maintaining LIC in patients with LIC < 7 mg Fe/g dw at a mean dose of 22.4 ± 5.2 mg/kg/d and significantly reducing LIC in patients with LIC ≥ 7 mg Fe/g dw at a mean dose of 25.7 ± 4.2 mg/kg/d, along with a manageable safety profile.


Assuntos
Benzoatos/uso terapêutico , Quelantes de Ferro/uso terapêutico , Ferro/metabolismo , Triazóis/uso terapêutico , Talassemia beta/tratamento farmacológico , Adolescente , Carga Corporal (Radioterapia) , Criança , Pré-Escolar , Deferasirox , Feminino , Humanos , Masculino , Estudos Prospectivos
13.
Eur J Haematol ; 87(4): 355-65, 2011 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-21668502

RESUMO

Following 1-yr deferasirox therapy in the ESCALATOR study, 57% of previously chelated patients with ß-thalassaemia achieved treatment success (maintenance of or reduction in liver iron concentration (LIC) vs. baseline LIC). Seventy-eight per cent had dose increases at median of 26 wk, suggesting that 1-yr results may not have reflected full deferasirox efficacy. Extension data are presented here. Deferasirox starting dose was 20 mg/kg/d (increases to 30/40 mg/kg/d permitted in the core/extension, respectively). Efficacy was primarily assessed by absolute change in LIC and serum ferritin. Overall, 231 patients received deferasirox in the extension; 67.4% (P < 0.0001) achieved treatment success. By the end of the extension, 66.2% of patients were receiving doses ≥ 30 mg/kg/d. By the end of the 1-yr extension, mean LIC had decreased by 6.6 ± 9.4 mg Fe/g dw (baseline 19.6 ± 9.2; P < 0.001) and median serum ferritin by 929 ng/mL (baseline 3356; P < 0.0001). There was a concomitant improvement in liver function markers (P < 0.0001). Fewer drug-related adverse events were reported in extension than core study (23.8% vs. 44.3%). Doses ≥ 30 mg/kg/d were generally required because of high transfusional iron intake and high baseline serum ferritin levels, highlighting the importance of administering an adequate dose to achieve net negative iron balance.


Assuntos
Benzoatos/uso terapêutico , Quelantes de Ferro/uso terapêutico , Triazóis/uso terapêutico , Talassemia beta/tratamento farmacológico , Deferasirox , Feminino , Humanos , Masculino
14.
Int J Cancer ; 127(9): 2106-18, 2010 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-20131314

RESUMO

The DNA repair protein O(6)-methylguanine-DNA methyltransferase (MGMT) is a key player in tumor cell resistance. Promoter methylation, MGMT activity and immunohistochemistry are used for determining the MGMT status. However, it is unclear whether MGMT promoter methylation correlates with MGMT activity and whether MGMT promoter methylation of the pretreatment tumor predicts the MGMT status of recurrences. To address these questions, we determined MGMT activity promoter methylation and immunoreactivity in pretreatment and recurrent glioblastomas (GB, WHO Grade IV), and in astrocytomas (WHO Grade III). We show that GB that were promoter methylated display a range of 0-62 fmol/mg MGMT and tumors that were nonmethylated 0-423 fmol/mg protein. For astrocytomas, promoter-methylated samples displayed 0-28 fmol/mg and, nonmethylated samples, 23-107 fmol/mg. No correlation was found between the intensity of promoter methylation and MGMT activity. Given a threshold level of 30 fmol/mg of protein, we found a correlation between promoter methylation and no/low MGMT activity in 82.4% of the tumors. This high correlation level was only observed when tumors were excluded showing a hemimethylated promoter (20%). Therefore, classification of hemimethylated tumors remains questionable. Further, we show that 39.1% of pretreatment GB and 5.3% of recurrences were promoter methylated, which is in line with the observed increase of MGMT activity in recurrences. Although individual exceptions were found, the data show an overall correlation between promoter methylation and lack/low MGMT activity in GB and astrocytomas. We also show that promoter methylation assay is superior over immunohistochemistry in determining the MGMT status defined by a given MGMT activity level.


Assuntos
Astrocitoma/enzimologia , Astrocitoma/genética , Neoplasias Encefálicas/enzimologia , Neoplasias Encefálicas/genética , Metilação de DNA , Metilases de Modificação do DNA/genética , Metilases de Modificação do DNA/metabolismo , Enzimas Reparadoras do DNA/genética , Enzimas Reparadoras do DNA/metabolismo , Glioblastoma/enzimologia , Glioblastoma/genética , Regiões Promotoras Genéticas , Proteínas Supressoras de Tumor/genética , Proteínas Supressoras de Tumor/metabolismo , Linhagem Celular Tumoral , Humanos , Imuno-Histoquímica , Recidiva
15.
Acta Haematol ; 123(4): 220-5, 2010.
Artigo em Inglês | MEDLINE | ID: mdl-20424435

RESUMO

Patient-reported outcomes of once-daily oral deferasirox (Exjade) in iron-overloaded patients with beta-thalassemia not achieving successful chelation with prior deferoxamine and/or deferiprone were investigated in a prospective, open-label, 1-year, multicenter study in the Middle East (ESCALATOR). The initial dose of deferasirox was 20 mg/kg/day, with subsequent dose adjustments. At baseline and the end of study (EOS), patients (n = 237) completed a 5-point rating scale for treatment satisfaction and convenience, and recorded time lost to treatment. At EOS, 90.7% of patients were 'satisfied'/'very satisfied' with their iron chelation therapy (ICT) versus 23.2% at baseline. 92.8% (EOS) versus 21.5% (baseline) of patients considered their therapy to be 'convenient'/'very convenient'. Time lost to therapy for daily activities was substantially reduced (3.2 +/- 8.6 [mean +/- SD; EOS] vs. 30.1 +/- 44.2 [baseline] h/month). Patients reported greater satisfaction and convenience, and lower impact on daily activities, with deferasirox than with previous ICT. This may help improve adherence to lifelong ICT in iron-overloaded beta-thalassemia patients.


Assuntos
Benzoatos/administração & dosagem , Quelantes de Ferro/administração & dosagem , Sobrecarga de Ferro/tratamento farmacológico , Satisfação do Paciente , Triazóis/administração & dosagem , Talassemia beta/tratamento farmacológico , Adolescente , Adulto , Criança , Pré-Escolar , Deferasirox , Feminino , Humanos , Masculino , Oriente Médio , Estudos Prospectivos
16.
Eur J Haematol ; 82(6): 454-7, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19191863

RESUMO

This subgroup analysis evaluated the effect of once-daily oral deferasirox on labile plasma iron (LPI) levels in patients from the prospective, 1-yr, multicentre ESCALATOR study. Mean baseline liver iron concentration and median serum ferritin levels were 28.6 +/- 10.3 mg Fe/g dry weight and 6334 ng/mL respectively, indicating high iron burden despite prior chelation therapy. Baseline LPI levels (0.98 +/- 0.82 micromol/L) decreased significantly to 0.12 +/- 0.16 micromol/L, 2 h after first deferasirox dose (P = 0.0006). Reductions from pre- to post-deferasirox administration were also observed at all other time points. Compared to baseline, there was a significant reduction in preadministration LPI that reached the normal range at week 4 and throughout the remainder of the study (P < or = 0.02). Pharmacokinetic analysis demonstrated an inverse relationship between preadministration LPI levels and trough deferasirox plasma concentrations. Once-daily dosing with deferasirox > or =20 mg/kg/d provided sustained reduction in LPI levels in these heavily iron-overloaded patients, suggesting 24-h protection from LPI. Deferasirox may therefore reduce unregulated tissue iron loading and prevent further end-organ damage.


Assuntos
Benzoatos/administração & dosagem , Quelantes de Ferro/administração & dosagem , Sobrecarga de Ferro/tratamento farmacológico , Ferro/sangue , Triazóis/administração & dosagem , Talassemia beta/tratamento farmacológico , Adolescente , Adulto , Benzoatos/farmacocinética , Criança , Deferasirox , Feminino , Ferritinas/sangue , Humanos , Ferro/análise , Quelantes de Ferro/farmacocinética , Fígado/química , Masculino , Resultado do Tratamento , Triazóis/farmacocinética , Adulto Jovem
17.
Eur J Haematol ; 82(6): 458-65, 2009 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-19187278

RESUMO

OBJECTIVE: Many patients with transfusional iron overload are at risk for progressive organ dysfunction and early death and poor compliance with older chelation therapies is believed to be a major contributing factor. Phase II/III studies have shown that oral deferasirox 20-30 mg/kg/d reduces iron burden, depending on transfusional iron intake. METHODS: The prospective, open-label, 1-yr ESCALATOR study in the Middle East was designed to evaluate once-daily deferasirox in patients > or =2 yr with beta-thalassaemia major and iron overload who were previously chelated with deferoxamine and/or deferiprone. Most patients began treatment with deferasirox 20 mg/kg/d; doses were adjusted in response to markers of over- or under-chelation. The primary endpoint was treatment success, defined as a reduction in liver iron concentration (LIC) of > or =3 mg Fe/g dry weight (dw) if baseline LIC was > or =10 mg Fe/g dw, or final LIC of 1-7 mg Fe/g dw for patients with baseline LIC of 2 to <10 mg Fe/g dw. RESULTS: Overall, 233/237 enrolled patients completed 1 yr's treatment. Mean baseline LIC was 18.0 +/- 9.1 mg Fe/g dw, while median serum ferritin was 3356 ng/mL. After 1 yr's deferasirox treatment, the intent-to-treat population experienced a significant treatment success rate of 57.0% (P = 0.016) and a mean reduction in LIC of 3.4 mg Fe/g dw. Changes in serum ferritin appeared to parallel dose increases at around 24 wk. Most patients (78.1%) underwent dose increases above 20 mg/kg/d, primarily to 30 mg/kg/d. Drug-related adverse events were mostly mild to moderate and resolved without discontinuing treatment. CONCLUSIONS: The results of the ESCALATOR study in primarily heavily iron-overloaded patients confirm previous observations in patients with beta-thalassaemia, highlighting the importance of timely deferasirox dose adjustments based on serum ferritin levels and transfusional iron intake to ensure patients achieve their therapeutic goal of maintenance or reduction in iron burden.


Assuntos
Benzoatos/administração & dosagem , Quelantes de Ferro/administração & dosagem , Sobrecarga de Ferro/tratamento farmacológico , Triazóis/administração & dosagem , Talassemia beta/tratamento farmacológico , Adolescente , Adulto , Benzoatos/efeitos adversos , Pré-Escolar , Deferasirox , Deferiprona , Desferroxamina , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos , Feminino , Ferritinas/sangue , Humanos , Ferro/análise , Quelantes de Ferro/efeitos adversos , Fígado/química , Masculino , Piridonas , Resultado do Tratamento , Triazóis/efeitos adversos , Adulto Jovem
18.
J Toxicol Environ Health A ; 71(13-14): 859-65, 2008.
Artigo em Inglês | MEDLINE | ID: mdl-18569586

RESUMO

Between 1946 and 1990 uranium mining was undertaken on a large scale in East Germany. This study evaluates the proportional lung cancer risk of German uranium miners from radon, quartz, and arsenic exposure during mining operations at the WISMUT Corporation. The database of the WISMUT tissue repository and a comprehensive job-exposure matrix were used to compare exposure levels of lung cancer cases with deaths from diseases of the circulatory system for risk analysis. In addition, the ratio of lung cancer cases was compared to cases from diseases of the circulatory system to the corresponding ratio in the general population. The proportional lung cancer mortality of German uranium miners was 2.9-fold higher than in the general population of East Germany. Cumulative radon, quartz, and arsenic exposure were determined as risk factors for lung cancer among German uranium miners, where silicosis modified the risk of cumulative radon and quartz exposure. Silicotics were exposed to higher levels of quartz, radon, and arsenic than nonsilicotics. Because selection of the study population was based on a tissue repository, the results need to be interpreted with caution.


Assuntos
Arsênio/efeitos adversos , Neoplasias Pulmonares/mortalidade , Mineração , Exposição Ocupacional/efeitos adversos , Quartzo/efeitos adversos , Radônio/efeitos adversos , Idoso , Poluentes Ambientais/efeitos adversos , Alemanha/epidemiologia , Humanos , Neoplasias Pulmonares/induzido quimicamente , Neoplasias Pulmonares/epidemiologia , Masculino , Pessoa de Meia-Idade , Fatores de Risco , Fatores de Tempo , Urânio
19.
ESMO Open ; 3(5): e000388, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30094073

RESUMO

INTRODUCTION: Somatostatin analogues exert antitumour activity via direct and indirect mechanisms. The present study was designed to assess the safety and efficacy of pasireotide in patients with BRAF-wild type (WT) and NRAS-WT metastatic melanoma. PATIENTS AND METHODS: Patients with unresectable and/or metastatic melanoma or Merkel cell carcinoma were eligible. Pasireotide was administered at different doses for ≤8 weeks in dose-escalation phase, followed by long-acting pasireotide 80 mg or lower dose in case of toxicity in follow-up phase up to six additional months. Primary endpoint was safety in the first 8 weeks of dose-escalation phase. RESULTS: The study was terminated early due to slow recruitment. Of the 10 patients with metastatic melanoma enrolled, only four reached the high dose level: two patients reached 3600 µg in dose-escalation and follow-up phases and two patients reached 3600 µg in dose-escalation and long-acting pasireotide 80 mg in follow-up phases and were stable for >5 months. Most common adverse events (AEs) during dose-escalation phase in ≥2 patients (20%) were: diarrhoea (50%), nausea (50%), fatigue (20%), hyperglycaemia (20%), hypophosphatemia (20%), chills (20%) and tumour pain (20%). Grade 3 or 4 study drug-related AEs were diarrhoea and nausea, reported in one patient. Partial response was documented in one patient and stable disease in another. CONCLUSIONS: Pasireotide was well tolerated, and safety results were similar to those previously reported in other indications. Further studies are needed to evaluate its antitumour activity alone and in combination with other drugs in melanoma.

20.
Dtsch Arztebl Int ; 112(39): 655-62, 2015 Sep 25.
Artigo em Inglês | MEDLINE | ID: mdl-26479485

RESUMO

BACKGROUND: 5-10% of schoolchildren in Germany are absent from school without an excuse more than five times per year. We investigate the effectiveness of manual-based, multimodal cognitive behavioral therapy focusing on school-avoidant behavior and on the underlying mental disorders. METHODS: 112 school avoiders were recruited from an outpatient child and adolescent psychiatric clinic and adaptively randomized into two treatment groups. The first group received manual-based multimodal treatment (MT), the second group treatment as usual (TAU) in the child and adolescent mental health care system. The primary outcome of the study was the percentage of classes attended in the five days prior to first measurement (before the intervention), as well as 6 and 12 months afterward. In each of these periods, school attendance was characterized as regular, partial, or none. Secondary outcomes were the severity of anxiety and depressive symptoms, self-efficacy, and quality of family life. RESULTS: In both treatment arms, the percentage of regular school attenders rose to about 60% in 6 months, regardless of the intervention (MT 60.6%, TAU 58.3%; odds ratio [OR] for changes over baseline 6.94, 95% confidence interval [CI] 3.98-12.12, p< 0.001; OR for MT versus TAU 1.05, 95% CI 0.58-1.90, p = 0.875). The improvement persisted 12 months after inclusion. CONCLUSION: In accordance with earlier studies, we found that manual-based multimodal treatment did not improve school avoidance to any greater extent than treatment as usual. Future studies should focus on the conditions for successful reintegration in school and on the differential indicators for outpatient versus inpatient treatment.


Assuntos
Absenteísmo , Transtornos do Comportamento Infantil/psicologia , Transtornos do Comportamento Infantil/terapia , Terapia Cognitivo-Comportamental/métodos , Transtornos Mentais/psicologia , Transtornos Mentais/terapia , Adolescente , Comportamento do Adolescente/psicologia , Aprendizagem da Esquiva , Criança , Comportamento Infantil/psicologia , Transtornos do Comportamento Infantil/diagnóstico , Pré-Escolar , Feminino , Alemanha , Humanos , Masculino , Transtornos Mentais/diagnóstico , Resultado do Tratamento
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