Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 437
Filtrar
Más filtros

País/Región como asunto
Tipo del documento
Intervalo de año de publicación
1.
Eur Child Adolesc Psychiatry ; 30(11): 1779-1791, 2021 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-33006003

RESUMEN

As mental health systems move towards person-centred care, outcome measurement in clinical research and practice should track changes that matter to young people and their families. This study mapped the types of change described by three key stakeholder groups following psychotherapy for depression, and compared the salience of these outcomes with the frequency of their measurement in recent quantitative treatment effectiveness studies for adolescent depression.Using qualitative content analysis, this study identified and categorized outcomes across 102 semi-structured interviews that were conducted with depressed adolescents, their parents, and therapists, as part of a randomized superiority trial. Adolescents had been allocated to Cognitive-Behavioral Therapy, Short-Term Psychoanalytic Psychotherapy, or a Brief Psychosocial Intervention.The study mapped seven high-level outcome domains and 29 outcome categories. On average, participants discussed change in four domains and six outcome categories. The most frequently discussed outcome was an improvement in mood and affect (i.e., core depressive symptoms), but close to half of the participants also described changes in family functioning, coping and resilience, academic functioning, or social functioning. Coping had specific importance for adolescents, while parents and therapists showed particular interest in academic functioning. There was some variation in the outcomes discussed beyond these core themes, across stakeholder groups and treatment arms.Of the outcomes that were frequently discussed in stakeholder narratives, only symptomatic change has been commonly reported in recent treatment studies for adolescent depression. A shift towards considering multiple outcome domains and perspectives is needed to reflect stakeholder priorities and enable more nuanced insights into change processes.


Asunto(s)
Depresión , Psicoterapia , Adolescente , Actitud del Personal de Salud , Actitud Frente a la Salud , Depresión/psicología , Depresión/terapia , Humanos , Padres/psicología , Resultado del Tratamiento
2.
Hautarzt ; 71(5): 342-358, 2020 May.
Artículo en Alemán | MEDLINE | ID: mdl-32303770

RESUMEN

Systemic autoinflammatory diseases are characterized by a spontaneous chronic inflammatory reaction mediated by the innate immunity. The inflammatory processes involve many organs including the skin. Diagnosis remains a challenge despite new molecular genetic methods, but early diagnosis is crucial for the prevention of long-term complications such as amyloidosis. Skin manifestations are often observed early in the course of the disease and can be decisive in the diagnosis.


Asunto(s)
Enfermedades Autoinmunes/diagnóstico , Enfermedades Autoinflamatorias Hereditarias/diagnóstico , Humanos , Inmunidad Innata , Inflamación , Piel
3.
Br J Dermatol ; 180(4): 859-868, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30339714

RESUMEN

BACKGROUND: Schnitzler syndrome (SchS) is a rare autoinflammatory disease characterized by urticarial exanthema, bone and joint alterations, fever and monoclonal gammopathy, which manifest mostly in the second half of life. It involves overactivation of the interleukin (IL)-1 system, but the exact pathophysiological pathways remain largely unknown. OBJECTIVES: To identify and characterize the pathogenetic players in SchS. METHODS: Blood parameters were quantified in patients with SchS compared with healthy controls and patients with psoriasis and hidradenitis suppurativa using enzyme-linked immunosorbent assay (ELISA). CCL2 expression in cultured primary cells was analysed by quantitative reverse-transcriptase polymerase chain reaction and ELISA. RESULTS: CCL2, a chemoattractant for monocytic and further mononuclear immune cells, was found to be significantly elevated in patients with SchS. CCL2 levels showed a positive association with global disease activity, especially with bone pain, but not disease duration, gammopathy, neutrophilia or skin disease. In vitro stimulation assays demonstrated a strong CCL2 production capacity of mononuclear immune cells and fibroblasts, but not epithelial or endothelial cells. Among a range of inflammatory mediators, only IL-1ß (immune cells, fibroblasts) and tumour necrosis factor (TNF)-α (fibroblasts) were important CCL2 inducers. TNF-α, but not IL-17, strengthened the CCL2-inducing effect of IL-1ß in fibroblasts. Accordingly, CCL2 levels positively correlated with both TNF-α and IL-1ß serum levels in patients with SchS. Therapeutic IL-1ß blockade decreased CCL2 blood levels in these patients as early as 1 week after the initiation of treatment. CONCLUSIONS: CCL2 may be an important component of the pathogenetic cascade leading to bone alterations, and a suitable marker of disease activity in patients with SchS.


Asunto(s)
Anticuerpos Monoclonales Humanizados/administración & dosificación , Quimiocina CCL2/sangre , Interleucina-1beta/antagonistas & inhibidores , Dolor Musculoesquelético/diagnóstico , Síndrome de Schnitzler/diagnóstico , Adulto , Anciano , Biomarcadores/sangre , Estudios de Casos y Controles , Células Cultivadas , Quimiocina CCL2/inmunología , Quimiocina CCL2/metabolismo , Femenino , Fibroblastos/inmunología , Fibroblastos/metabolismo , Voluntarios Sanos , Hidradenitis Supurativa/sangre , Humanos , Interleucina-1beta/sangre , Interleucina-1beta/inmunología , Interleucina-1beta/metabolismo , Leucocitos Mononucleares/inmunología , Leucocitos Mononucleares/metabolismo , Masculino , Persona de Mediana Edad , Dolor Musculoesquelético/sangre , Dolor Musculoesquelético/tratamiento farmacológico , Dolor Musculoesquelético/inmunología , Cultivo Primario de Células , Psoriasis/sangre , Síndrome de Schnitzler/sangre , Síndrome de Schnitzler/tratamiento farmacológico , Síndrome de Schnitzler/inmunología , Transducción de Señal/efectos de los fármacos , Transducción de Señal/inmunología , Factor de Necrosis Tumoral alfa/sangre , Factor de Necrosis Tumoral alfa/inmunología , Factor de Necrosis Tumoral alfa/metabolismo
4.
Artículo en Inglés | MEDLINE | ID: mdl-29866876

RESUMEN

The next-generation aminoglycoside plazomicin, in development for infections due to multidrug-resistant (MDR) Enterobacteriaceae, was evaluated alongside comparators for bactericidal activity in minimum bactericidal concentration (MBC) and time-kill (TK) assays against MDR Enterobacteriaceae isolates with characterized aminoglycoside and ß-lactam resistance mechanisms. Overall, plazomicin and colistin were the most potent, with plazomicin demonstrating an MBC50/90 of 0.5/4 µg/ml and sustained 3-log10 kill against MDR Escherichia coli, Klebsiella pneumoniae, and Enterobacter spp.


Asunto(s)
Antibacterianos/farmacología , Farmacorresistencia Bacteriana Múltiple/efectos de los fármacos , Enterobacter/efectos de los fármacos , Escherichia coli/efectos de los fármacos , Klebsiella pneumoniae/efectos de los fármacos , Sisomicina/análogos & derivados , Aminoglicósidos/farmacología , Carbapenémicos/farmacología , Farmacorresistencia Bacteriana Múltiple/genética , Enterobacter/genética , Enterobacter/crecimiento & desarrollo , Escherichia coli/genética , Escherichia coli/crecimiento & desarrollo , Fluoroquinolonas/farmacología , Klebsiella pneumoniae/genética , Klebsiella pneumoniae/crecimiento & desarrollo , Pruebas de Sensibilidad Microbiana , Polimixinas/farmacología , Sisomicina/farmacología , Tetraciclinas/farmacología
5.
Clin Exp Dermatol ; 43(2): 131-136, 2018 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-29064119

RESUMEN

BACKGROUND: Chronic spontaneous urticaria (CSU) is an inflammatory skin disorder characterized by recurrent weals, angio-oedema or both. Recent studies have shown that the number of endothelial cells is increased in the skin of patients with CSU, but the underlying mechanisms and clinical implications of this are unclear. AIM: To evaluate whether mast cell (MC) or endothelial cell (EC) numbers correlate with CSU and whether they are relevant for disease duration, disease activity or the presence of clinical features. METHODS: We determined the numbers of CD31+ ECs and MCs in nonlesional skin of 30 patients with CSU using quantitative histomorphometry, and assessed their correlation with each other and with clinical features such as disease duration, disease activity and occurrence of angio-oedema. RESULTS: The numbers of MCs and ECs were high in the nonlesional skin of patients with CSU, but did not correlate with each other. Neither MC number nor EC number correlated with disease duration or disease activity. Interestingly, patients with high numbers of cutaneous CD31+ ECs had higher rates of recurrent angio-oedema and vice versa. CONCLUSIONS: Based on these findings, we speculate that vascular remodelling and MC hyperplasia in patients with CSU occurs independently and via different mechanisms. Targeting of the mechanisms that drive neoangiogenesis in CSU may result in novel therapeutic strategies for the management of patients with angio-oedema.


Asunto(s)
Angioedema/patología , Células Endoteliales , Mastocitos , Urticaria/patología , Adulto , Anciano , Biopsia , Enfermedad Crónica , Femenino , Humanos , Hiperplasia/etiología , Masculino , Persona de Mediana Edad , Recurrencia , Piel/patología
6.
J Antimicrob Chemother ; 72(5): 1400-1409, 2017 05 01.
Artículo en Inglés | MEDLINE | ID: mdl-28137941

RESUMEN

Objectives: When tested in broth, avibactam reverses ceftazidime resistance in many Pseudomonas aeruginosa that express ESBLs. We examined whether similar reversal is observed against intracellular forms of P. aeruginosa . Methods: Strains: reference strains; two engineered strains with basal non-inducible expression of AmpC and their isogenic mutants with stably derepressed AmpC; and clinical isolates with complete, partial or no resistance to reversion with avibactam. Pharmacodynamic model: 24 h concentration-response to ceftazidime [0.01-200 mg/L alone or with avibactam (4 mg/L)] of bacteria in broth or bacteria phagocytosed by THP-1 monocytes, with calculation of ceftazidime relative potency ( C s : concentration yielding a static effect) and maximal relative effect [ E max : cfu decrease at infinitely large antibiotic concentrations (efficacy in the model)] using the Hill equation. Cellular content of avibactam: quantification by LC-MS/MS. Results: For both extracellular and intracellular bacteria, ceftazidime C s was always close to its MIC. For ceftazidime-resistant strains, avibactam addition shifted ceftazidime C s to values close to the MIC of the combination in broth. E max was systematically below the detection limit (-5 log 10 ) for extracellular bacteria, but limited to -1.3 log 10 for intracellular bacteria (except for two isolates) with no effect of avibactam. The cellular concentration of avibactam reflected extracellular concentration and was not influenced by ceftazidime (0-160 mg/L). Conclusions: The potential for avibactam to inhibit ß-lactamases does not differ for extracellular and intracellular forms of P. aeruginosa , denoting an unhindered access to its target in both situations. The loss of maximal relative efficacy of ceftazidime against intracellular P. aeruginosa was unrelated to resistance via avibactam-inhibitable ß-lactamases.


Asunto(s)
Antibacterianos/farmacología , Compuestos de Azabiciclo/farmacología , Ceftazidima/farmacología , Leucocitos Mononucleares/microbiología , Pseudomonas aeruginosa/efectos de los fármacos , Inhibidores de beta-Lactamasas/farmacología , Citoplasma/efectos de los fármacos , Citoplasma/microbiología , Combinación de Medicamentos , Humanos , Cinética , Leucocitos Mononucleares/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Pseudomonas aeruginosa/genética , Espectrometría de Masas en Tándem
7.
Horm Metab Res ; 48(9): 601-6, 2016 09.
Artículo en Inglés | MEDLINE | ID: mdl-27258970

RESUMEN

FOXO transcription factors are key regulators of DNA damage repair, proliferation and apoptosis in thyrocytes. Thyroid malignancies show impaired FOXO function. In this study, we investigated the transcriptional regulation of FOXO isoforms in thyroid epithelial cells. mRNA expression of FOXO isoforms (FOXO1, 3 and 4) was determined in FRTL-5 cells stimulated with different growth factors and H2O2. Furthermore, the impact of PI3K/AKT signalling on FOXO transcription was investigated in PI3K p110α mutant FRTL-5 cells and regulatory dependence of FOXO transcription on FOXO was studied in FRTL-5 cells with hFOXO3 overexpression. Finally, mRNA expression levels of FOXO isoforms were determined in human epithelial thyroid tumours. Growth factor deprivation induced transcription of FOXO1, 3 and 4, whereas insulin stimulation decreased FOXO1 and FOXO4 transcription in FRTL-5 cells. Inhibition of the PI3K/AKT cascade amplified FOXO1 and FOXO4 expression. In contrast, H2O2 and TSH did not influence FOXO transcription in thyrocytes. Overexpression of PI3K p110α inhibited FOXO3 and induced FOXO4 transcription. In human thyroid tumours, FOXO1 and FOXO3 mRNA levels were significantly downregulated in papillary thyroid carcinoma when compared to normal tissues. In contrast, follicular thyroid carcinomas showed significant upregulation of FOXO4 mRNA.In this paper, we demonstrate an influence of PI3K signalling on FOXO transcription in thyrocytes. Moreover, we show that thyroid cancers exhibit alterations in FOXO transcription besides the previously reported alterations in posttranslational FOXO3 regulation. These findings may add to the concept of targeting the PI3K pathway in advanced thyroid cancers.


Asunto(s)
Adenocarcinoma Folicular/genética , Adenoma/genética , Factores de Transcripción Forkhead/genética , Regulación Neoplásica de la Expresión Génica , Células Epiteliales Tiroideas/metabolismo , Neoplasias de la Tiroides/genética , Adenocarcinoma Folicular/patología , Adenoma/patología , Animales , Proteínas de Ciclo Celular , Células Cultivadas , Proteína Forkhead Box O1/genética , Proteína Forkhead Box O3/genética , Humanos , Fosfatidilinositol 3-Quinasas/genética , Proteínas Proto-Oncogénicas c-akt/genética , ARN Mensajero/genética , Ratas , Reacción en Cadena en Tiempo Real de la Polimerasa , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Transducción de Señal , Células Epiteliales Tiroideas/patología , Neoplasias de la Tiroides/patología , Factores de Transcripción/genética , Activación Transcripcional
8.
Lett Appl Microbiol ; 63(2): 96-102, 2016 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-27221329

RESUMEN

UNLABELLED: The magnitudes of the postantibiotic effect (PAE) and post-ß-lactamase-inhibitory effect (PLIE) of ceftazidime-avibactam, ceftaroline-avibactam, and aztreonam-avibactam were determined against isolates of Enterobacteriaceae and Pseudomonas aeruginosa that either harboured genes encoding serine and/or metallo-ß-lactamases, or did not harbour bla genes. The bla genes included ones that encoded extended spectrum ß-lactamases, AmpC and KPC ß-lactamases, and one metallo-ß-lactamase, NDM-1. No substantial PAE was observed for any combination against any isolate. One substantial PLIE was found: a value of 1·9 h for ceftazidime-avibactam against Klebsiella pneumoniae (blaKPC-2 ). From comparison with results in the literature, we propose that the existence of a substantial PLIE depends on the bacterial isolate and on the specific ß-lactamase inhibitor and ß-lactam combination. SIGNIFICANCE AND IMPACT OF THE STUDY: A wave of new ß-lactamase inhibitors is entering either therapeutic use or clinical trials. The present work characterizes the postantibiotic effect (PAE) and post-ß-lactamase-inhibitory effect (PLIE) of the clinically most advanced of these compounds, avibactam. We show that the existence of a measurable PLIE is strain- (and possibly compound-) dependent, and cannot be relied upon as a standard component of the primary pharmacology of a new ß-lactamase inhibitor. This variability was not reported in earlier studies of clavulanic acid or sulbactam.


Asunto(s)
Antibacterianos/farmacología , Compuestos de Azabiciclo/farmacología , Aztreonam/farmacología , Proteínas Bacterianas/genética , Ceftazidima/farmacología , Klebsiella pneumoniae/efectos de los fármacos , Pseudomonas aeruginosa/efectos de los fármacos , Inhibidores de beta-Lactamasas/farmacología , beta-Lactamasas/genética , Cefalosporinas , Combinación de Medicamentos , Humanos , Klebsiella pneumoniae/genética , Pruebas de Sensibilidad Microbiana , Pseudomonas aeruginosa/genética , Sulbactam/farmacología , Ceftarolina
9.
Hautarzt ; 72(6): 516, 2021 Jun.
Artículo en Alemán | MEDLINE | ID: mdl-34061218
10.
J Eur Acad Dermatol Venereol ; 29(10): 2043-5, 2015 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25266078

RESUMEN

BACKGROUND: Cold- and heat-induced urticaria are chronic physical urticaria conditions in which wheals, angioedema or both are evoked by skin exposure to cold and heat respectively. The diagnostic work up of both conditions should include skin provocation tests and accurate determination of critical temperature thresholds (CTT) for producing symptoms in order to be able to predict the potential risk that each individual patient faces and how this may be ameliorated by therapy. OBJECTIVE: To develop and validate TempTest(®) 4, a simple and relatively inexpensive instrument for the accurate determination of CTT which may be used in clinical practice. METHODS: TempTest(®) 4 has a single 2 mm wide 350 mm U-shaped Peltier element generating a temperature gradient from 4 °C to 44 °C along its length. Using a clear plastic guide placed over the skin after provocation, CTT values may be determined with an accuracy of ±1 °C. Here, TempTest(®) 4 was compared with its much more expensive predecessor, TempTest(®) 3, in inducing wheals in 30 cold urticaria patients. RESULTS: Both TempTest(®) 4 and TempTest(®) 3 induced wheals in all 30 patients between 8 ° and 28 °C. There was a highly significant (P < 0.0001) correlation between the instruments in the CTT values in individual patients. CONCLUSION: The TempTest(®) 4 is a simple, easy to use, licensed, commercially available and affordable instrument for the determination of CTTs in both cold- and heat-induced urticaria.


Asunto(s)
Temperatura Cutánea , Urticaria/fisiopatología , Adolescente , Adulto , Anciano , Estudios de Casos y Controles , Frío/efectos adversos , Femenino , Calor/efectos adversos , Humanos , Masculino , Persona de Mediana Edad , Pruebas Cutáneas/instrumentación , Urticaria/etiología , Adulto Joven
12.
Arch Toxicol ; 88(5): 1109-26, 2014 May.
Artículo en Inglés | MEDLINE | ID: mdl-24691702

RESUMEN

Developmental toxicity in vitro assays have hitherto been established as stand-alone systems, based on a limited number of toxicants. Within the embryonic stem cell-based novel alternative tests project, we developed a test battery framework that allows inclusion of any developmental toxicity assay and that explores the responses of such test systems to a wide range of drug-like compounds. We selected 28 compounds, including several biologics (e.g., erythropoietin), classical pharmaceuticals (e.g., roflumilast) and also six environmental toxicants. The chemical, toxicological and clinical data of this screen library were compiled. In order to determine a non-cytotoxic concentration range, cytotoxicity data were obtained for all compounds from HEK293 cells and from murine embryonic stem cells. Moreover, an estimate of relevant exposures was provided by literature data mining. To evaluate feasibility of the suggested test framework, we selected a well-characterized assay that evaluates 'migration inhibition of neural crest cells.' Screening at the highest non-cytotoxic concentration resulted in 11 hits (e.g., geldanamycin, abiraterone, gefitinib, chlorpromazine, cyproconazole, arsenite). These were confirmed in concentration-response studies. Subsequent pharmacokinetic modeling indicated that triadimefon exerted its effects at concentrations relevant to the in vivo situation, and also interferon-ß and polybrominated diphenyl ether showed effects within the same order of magnitude of concentrations that may be reached in humans. In conclusion, the test battery framework can identify compounds that disturb processes relevant for human development and therefore may represent developmental toxicants. The open structure of the strategy allows rich information to be generated on both the underlying library, and on any contributing assay.


Asunto(s)
Pruebas de Toxicidad/métodos , Animales , Diferenciación Celular/efectos de los fármacos , Movimiento Celular/efectos de los fármacos , Relación Dosis-Respuesta a Droga , Células Madre Embrionarias/efectos de los fármacos , Células HEK293/efectos de los fármacos , Humanos , Ratones , Modelos Teóricos , Cresta Neural/citología
13.
Rev Med Suisse ; 10(435): 1350-5, 2014 Jun 18.
Artículo en Francés | MEDLINE | ID: mdl-25051598

RESUMEN

Regenerative medicine aims to replace a body function or specific cell loss. It includes therapies at the forefront of modem medicine, issuing from translational biomedical research. Transplantation of organs and cells has revolutionized the management of patients for whom medical treatment is a failure. Unfortunately, organ shortage is limiting treatment possibility. As an example, among the 15,000 patients with type I diabetes in Switzerland, only approximately 30 can receive a pancreas or an islet transplant per year. Second example, 500 patients die each year in Switzerland from alcoholic cirrhosis because no treatment is available. Transplantation of islet cells, hepatocytes, mesenchymal stem cells or dopaminergic neurons represents hope fora therapy available for large populations of patients.


Asunto(s)
Trasplante de Células/métodos , Trasplante de Órganos/estadística & datos numéricos , Medicina Regenerativa/métodos , Trasplante de Células/tendencias , Diabetes Mellitus Tipo 1/epidemiología , Diabetes Mellitus Tipo 1/terapia , Humanos , Trasplante de Islotes Pancreáticos/métodos , Cirrosis Hepática Alcohólica/epidemiología , Cirrosis Hepática Alcohólica/terapia , Medicina Regenerativa/tendencias , Suiza/epidemiología , Investigación Biomédica Traslacional/métodos
14.
ESMO Open ; 9(9): 103703, 2024 Sep 10.
Artículo en Inglés | MEDLINE | ID: mdl-39260162

RESUMEN

BACKGROUND: Neoadjuvant chemotherapy is an option for patients with locally advanced rectal cancer at low risk for local recurrence. This randomized phase II trial investigated whether the addition of aflibercept to modified FOLFOX6 (mFOLFOX6) could improve the rates of centrally confirmed pathological complete remissions (pCR) and (disease-free) survival in magnetic resonance imaging (MRI)-staged cT3 rectal cancer. PATIENTS AND METHODS: Patients with rectal cancer fulfilling the following criteria were included: lower border of tumor >5 cm and <16 cm from anal verge; circumferential resection margin >2 mm and T3-tumor with a maximum infiltration of 10 mm, as determined by MRI. Patients were randomized 1 : 2 to six cycles mFOLFOX6 ± aflibercept. Surgery was scheduled 4 weeks after chemotherapy. Primary endpoint was the rate of centrally confirmed pCR. The study was designed to detect an improvement of pCR from 10% to 27% (power 80%, type I error 20%). RESULTS: A total of 119 randomized patients started treatment (39 patients mFOLFOX6, arm A, and 80 mFOLFOX + aflibercept, arm B). The incidence of all grade adverse events was similar in both arms, however, adverse events grade ≥3 were more than twice as high in the experimental arm due to hypertension. Surgical complications were comparable. Aflibercept did not improve the pCR rate (arm A 26% versus arm B 19%, P = 0.47) and more patients in arm B had node positivity. With a median follow-up of 40.1 months, the 4-year disease-free survival was 83% in arm A and 85% in arm B (P = 0.82). Only two patients in arm A and one patient in arm B developed local recurrence. CONCLUSIONS: In patients with locally advanced rectal cancer and MRI-defined low risk of local recurrence, neoadjuvant mFOLFOX6 + aflibercept was feasible and did not compromise surgery. Survival data were favorable in both arms, but pCR rates were not increased by the addition of aflibercept.

15.
Contemp Clin Trials Commun ; 41: 101346, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39188411

RESUMEN

Introduction: Childhood specific phobias are among the most common and earliest onset mental disorders with a lifetime prevalence of more than ten percent. Brief intensive cognitive behavioral therapy (CBT) programs such as the One-Session Treatment (OST) are found to be effective in the remission of the specific phobias following treatment, but there is still room for improvement. The goal of the current study is to examine whether the long-term efficacy of OST increases by using a homework program supported by an app specifically designed for children; the Kids Beat Anxiety (KibA) homework program. Methods: Children aged between 7 and 14 years with a specific phobia receive OST preceded by a three-week baseline phase to control for time-effects. Directly following OST, children are randomized to either a four-week homework period supported by an app (OST + app), or standard One-Session Treatment with a four-week homework period that is only supported by therapist instructions (OST-only). Primary outcome variables are diagnosis and severity of the specific phobia. Secondary outcomes include behavioral avoidance, self-reported fear, and functional impairment. Data will be analyzed based on intention-to-treat and per protocol samples using mixed-effects multilevel linear models. Ethics and dissemination: The current study was approved by the METC of the Academic Medical Center, Amsterdam, The Netherlands (number: NL72697.018.20) and the Ethical Committee of the Ruhr University, Bochum, Germany (number: 663). Results of this trial will be published in peer-reviewed journals. Trial registration: The study was pre-registered at the Dutch Trial Register, number: NL 9216.

16.
Allergy ; 68(7): 921-8, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23742030

RESUMEN

BACKGROUND: Cold contact urticaria (CCU) is characterized by itchy wheal and flare responses due to the release of histamine and other pro-inflammatory mediators after exposure to cold. The treatment of choice is nonsedating antihistamines, dosages of which may be increased up to fourfold if standard doses are ineffective. Here, we assess the effects of a standard 20 mg dose and up-dosing to 40 and 80 mg of bilastine in reducing the symptoms of CCU and inflammatory mediator release following cold challenge. METHODS: Twenty patients with CCU were included in this randomized, crossover, double-blind, placebo-controlled 12-week study. They received placebo, 20, 40 or 80 mg of bilastine daily each for 7 days with 14-day washout periods. The primary readout was change in critical temperature thresholds (CTT). Secondary readouts were changes in pruritus, levels of histamine IL-6, IL-8 and TNF-α collected by skin microdialysis and safety and tolerability of bilastine. RESULTS: Bilastine 20 mg was highly effective (P < 0.0001) in reducing CTT. Up-dosing to 80 mg significantly (P < 0.04) increased its effectiveness. At this dose, 19 of 20 (95%) patients responded to treatment, with 12 of 20 (60%) becoming symptom free. Only one patient was refractory to treatment. Microdialysis levels of histamine, IL-6 and IL-8 assessed 1-3 h after cold challenge were significantly (P < 0.05) decreased following up-dosing with 80 mg bilastine. Bilastine treatment was well tolerated without evidence of increased sedation with dose escalation. CONCLUSIONS: Bilastine was effective in reducing the symptoms of patients with CCU. Increased efficacy of bilastine with fourfold up-dosing was without sedation and supports urticaria treatment guidelines.


Asunto(s)
Bencimidazoles/administración & dosificación , Frío/efectos adversos , Piperidinas/administración & dosificación , Urticaria/tratamiento farmacológico , Administración Oral , Adulto , Anciano , Distribución de Chi-Cuadrado , Intervalos de Confianza , Estudios Cruzados , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Esquema de Medicación , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Prospectivos , Medición de Riesgo , Estadísticas no Paramétricas , Resultado del Tratamiento , Urticaria/etiología , Adulto Joven
17.
Allergy ; 68(6): 816-9, 2013 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-23646863

RESUMEN

BACKGROUND: Chronic urticaria is a common disorder characterized by recurrent wheals, angioedema, or both. Several differential diagnoses need to be considered in patients presenting with wheals and/or angioedema. These include rare diseases such as autoinflammatory syndromes and urticarial vasculitis in patients with recurrent wheals and bradykinin-mediated angioedema in patients with recurrent swellings. AIM AND RESULT: In order to not miss these conditions, we have developed a symptom-based diagnostic algorithm for the management of patients with wheals and/or angioedema. DISCUSSION AND CONCLUSION: By asking the right questions and performing a limited diagnostic workup as suggested here, this algorithm may help to establish the right diagnosis and treat patients early and more effectively.


Asunto(s)
Algoritmos , Técnicas de Apoyo para la Decisión , Enfermedades Autoinflamatorias Hereditarias/diagnóstico , Síndrome de Schnitzler/diagnóstico , Urticaria/etiología , Vasculitis/diagnóstico , Angioedema/diagnóstico , Angioedema/etiología , Angioedemas Hereditarios/complicaciones , Angioedemas Hereditarios/diagnóstico , Enfermedad Crónica , Diagnóstico Diferencial , Enfermedades Autoinflamatorias Hereditarias/complicaciones , Humanos , Recurrencia , Síndrome de Schnitzler/complicaciones , Vasculitis/complicaciones
18.
Allergy ; 68(9): 1185-92, 2013 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-23919330

RESUMEN

BACKGROUND: Recurrent angioedema (RecA) is a frequent clinical problem characterized by suddenly occurring cutaneous and/or mucosal swellings. Depending on their location, RecA may be painful, hindering, disfiguring, or even life-threatening. The assessment of disease activity in affected patients is important to guide treatment decisions. Currently, however, there is no standardized and validated outcome measure available to do so. OBJECTIVE: To develop and validate the first specific patient-reported outcome instrument to assess disease activity in RecA patients, the Angioedema Activity Score (AAS). METHODS: After a set of potential AAS items was developed, item evaluation and reduction were performed by means of impact analysis, factor analysis, regression analysis, and by checking for face validity. In addition, the items of the final AAS questionnaire were tested for their validity and reliability during a 12-week validation study. RESULTS: In total, data from 110 and 80 RecA patients were used during the AAS item evaluation and validation phase, respectively. The resulting AAS consisted of five items and was found to have a one-dimensional structure and excellent internal consistency. It correlated well with other measures of disease activity and quality-of-life impairment, thus demonstrating its convergent validity. In addition, the known-groups validity and test-retest reliability of the AAS were found to be good. CONCLUSIONS: The AAS is the first validated and reliable tool to determine disease activity in RecA patients, and it may serve as a valuable instrument in future clinical studies and routine patient care.


Asunto(s)
Angioedema/diagnóstico , Índice de Severidad de la Enfermedad , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Reproducibilidad de los Resultados , Factores de Riesgo , Adulto Joven
19.
Allergy ; 68(7): 949-52, 2013 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-23734572

RESUMEN

BACKGROUND: Mastocytosis is frequently associated with mast cell-mediated symptoms which require relieving medication. While second generation antihistamines (sgAHs) are the first line therapeutic strategy to treat mast cell mediator-related symptoms, controlled clinical trials on how they improve quality of life have not been performed. METHODS: This randomized, double-blind, placebo-controlled, cross-over trial assessed rupatadine 20 mg daily in the treatment of mastocytosis symptoms in 30 adult patients. Symptoms were assessed by a visual analogue scale (VAS) and symptom specific quality of life questionnaire (ItchyQoL). RESULTS: The mean ItchyQoL total score and VAS symptom score were significantly improved in the rupatadine treatment phase compared with placebo. There were also significant reductions from placebo in the severity of itch, wheal and flare, flushing, tachycardia and headache but not gastrointestinal symptoms. CONCLUSIONS: In this first comprehensive trial of a sgAH in mastocytosis, rupatadine 20 mg daily for 4 weeks significantly controlled symptoms and improved patients' quality of life.


Asunto(s)
Ciproheptadina/análogos & derivados , Mastocitosis Cutánea/diagnóstico , Mastocitosis Cutánea/tratamiento farmacológico , Calidad de Vida , Administración Oral , Adulto , Anciano , Estudios Cruzados , Ciproheptadina/administración & dosificación , Relación Dosis-Respuesta a Droga , Método Doble Ciego , Esquema de Medicación , Femenino , Humanos , Masculino , Mastocitosis Cutánea/inmunología , Persona de Mediana Edad , Satisfacción del Paciente/estadística & datos numéricos , Medición de Riesgo , Índice de Severidad de la Enfermedad , España , Resultado del Tratamiento , Adulto Joven
20.
Allergy ; 68(2): 256-8, 2013 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-23320562

RESUMEN

BACKGROUND: Platelet-activating factor (PAF) causes wheal and flare responses which are abrogated by H1-antihistamines giving rise to the hypothesis that PAF-induced wheal development is secondary to histamine release from dermal mast cells. But is this hypothesis correct? METHODS: Wheal and flare responses were induced by intradermal injection of PAF, codeine and histamine in 14 healthy volunteers. Dermal histamine and PGD2 contractions were measured using microdialysis. RESULTS: PAF, unlike histamine and codeine, did not cause a statistically significant rise in mean histamine levels with ten persons showing negligible histamine release. Codeine caused a significant but variable histamine release, ranging from 29 to 282 ng/ml. Codeine, but not PAF or histamine, caused a small but statistically significant release of PGD2. CONCLUSION: Wheal and flare reactions in human skin induced by PAF are not associated with histamine release and, therefore, appear to be independent of mast cell degranulation.


Asunto(s)
Codeína/farmacología , Liberación de Histamina/efectos de los fármacos , Histamina/farmacología , Factor de Activación Plaquetaria/farmacología , Urticaria/inducido químicamente , Adulto , Degranulación de la Célula/efectos de los fármacos , Degranulación de la Célula/inmunología , Codeína/efectos adversos , Femenino , Alemania , Histamina/efectos adversos , Humanos , Inyecciones Intradérmicas , Masculino , Mastocitos/efectos de los fármacos , Mastocitos/inmunología , Microdiálisis , Factor de Activación Plaquetaria/efectos adversos , Valores de Referencia , Muestreo , Piel/efectos de los fármacos , Pruebas Cutáneas/métodos , Urticaria/inmunología , Adulto Joven
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA