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1.
J Eur Acad Dermatol Venereol ; 38(3): 583-593, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38391212

RESUMEN

BACKGROUND: Efficacy of the Janus kinase (JAK) inhibitor baricitinib for severe alopecia areata (AA) continuously increased over 52 weeks in two Phase 3 trials. There are limited long-term data on JAK inhibitors in AA. OBJECTIVES: To evaluate efficacy and safety of baricitinib for severe AA through 104 weeks of continuous therapy. METHODS: Integrated data from the BRAVE-AA1 and BRAVE-AA2 Phase 3 trials included adults with Severity of Alopecia Tool (SALT) scores ≥50 (≥50% scalp hair loss) randomized to and continuously treated with 2-mg or 4-mg baricitinib through Week 104. Patients who qualified to remain on continuous treatment included subjects who achieved SALT score ≤20 at Week 52 (Week-52 responders; 2-mg: N = 65; 4-mg: N = 129) and baricitinib 4-mg-treated patients who had SALT score >20 at Week 52 but achieved SALT score ≤20 at prior visit(s) and/or had significant improvement in eyebrow or eyelash hair growth relative to baseline by Week 52 (Week-52 mixed responders; N = 110). Week-104 outcomes included the proportion of patients achieving SALT score ≤20 (≤20% scalp hair loss). Data were censored after treatment discontinuation. RESULTS: Among baricitinib 4-mg-treated and baricitinib 2-mg-treated Week-52 responders, 90.7% and 89.2%, respectively, maintained SALT score ≤20 at Week 104. Among Week-52 mixed responders, 39.1% reached SALT score ≤20 by Week 104. Continued improvement in eyebrow and eyelash regrowth was observed across groups. The most frequent treatment-emergent adverse events were COVID-19, upper respiratory tract infection, headache, nasopharyngitis, acne, urinary tract infection and creatine phosphokinase increase. CONCLUSIONS: Baricitinib demonstrated a high level of maintenance of efficacy over 104 weeks in patients with severe AA. Efficacy increased in Week-52 mixed responders, illustrating that long-term treatment is necessary to observe maximum benefit in some patients. No new safety signals were observed.


Asunto(s)
Alopecia Areata , Azetidinas , Inhibidores de las Cinasas Janus , Purinas , Sulfonamidas , Adulto , Humanos , Alopecia/tratamiento farmacológico , Alopecia Areata/tratamiento farmacológico , Azetidinas/efectos adversos , Inhibidores de las Cinasas Janus/efectos adversos , Pirazoles/efectos adversos , Ensayos Clínicos Controlados Aleatorios como Asunto , Ensayos Clínicos Fase III como Asunto
2.
Australas J Dermatol ; 64(3): 330-338, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37408523

RESUMEN

BACKGROUND: Alopecia areata (AA) is a common immune-mediated non-scarring hair loss, with a worldwide incidence between 0.57% and 3.8%. The incidence and prevalence of AA in the Australian general population have not been previously reported. OBJECTIVE: To describe the incidence and prevalence of AA in Australia using primary care data. A secondary objective was to identify common demographic characteristics, comorbidities and treatment patterns among Australians living with AA. METHODS: We analysed electronic health record data captured from a national clinical practice management software over a 10-year index period between 2011 and 2020 calendar years, inclusive. The incidence of new-onset AA and the prevalence of active records with AA were estimated. Differences in incidence by sociodemographic groups, and patterns of treatment were also evaluated. RESULTS: There were 976 incident AA records. The incidence of new-onset AA in the total study cohort was 0.278 per 1000 person-years (95% CI 0.26-0.295). By age, the incidence was highest in the 19- to 34-year-old age bracket (0.503 per 1000 person-years: 95% CI 0.453-0.554). AA incidence was lower among females than males (IRR 0.763, p < 0.001, 95% CI 0.673-0.865). Among active records, 520 were prevalent AA records. AA point prevalence at 31/12/2020 was 0.13% (1.26 per 1000 persons; 95% CI 1.15-1.37). CONCLUSION: This is the first study to describe the epidemiology (incidence and point prevalence) and management of AA in the Australian primary health-care population through large-scale database analysis. Incidence and prevalence findings were consistent with earlier estimates from other regions.


Asunto(s)
Alopecia Areata , Masculino , Femenino , Humanos , Adulto Joven , Adulto , Alopecia Areata/epidemiología , Alopecia Areata/tratamiento farmacológico , Estudios Retrospectivos , Prevalencia , Incidencia , Registros Electrónicos de Salud , Australia/epidemiología , Atención Primaria de Salud
3.
Nano Lett ; 22(3): 979-988, 2022 Feb 09.
Artículo en Inglés | MEDLINE | ID: mdl-35061402

RESUMEN

Antisolvent-assisted spin coating has been widely used for fabricating metal halide perovskite films with smooth and compact morphology. However, localized nanoscale inhomogeneities exist in these films owing to rapid crystallization, undermining their overall optoelectronic performance. Here, we show that by relaxing the requirement for film smoothness, outstanding film quality can be obtained simply through a post-annealing grain growth process without passivation agents. The morphological changes, driven by a vaporized methylammonium chloride (MACl)-dimethylformamide (DMF) solution, lead to comprehensive defect elimination. Our nanoscale characterization visualizes the local defective clusters in the as-deposited film and their elimination following treatment, which couples with the observation of emissive grain boundaries and excellent inter- and intragrain optoelectronic uniformity in the polycrystalline film. Overcoming these performance-limiting inhomogeneities results in the enhancement of the photoresponse to low-light (<0.1 mW cm-2) illumination by up to 40-fold, yielding high-performance photodiodes with superior low-light detection.

4.
Clin Exp Dermatol ; 47(7): 1388-1390, 2022 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-34309895

RESUMEN

Genetic hair disorders can be an isolated phenomenon or part of a multisystem syndrome. Microscopic examination of scalp hair can provide useful information to aid diagnosis. This article describes several hair-shaft abnormalities, outlines genetic hair disorders with their associated genetic mutations, and clinical/hair phenotypes.


Asunto(s)
Enfermedades del Cabello , Niño , Cabello , Enfermedades del Cabello/diagnóstico , Enfermedades del Cabello/genética , Humanos , Examen Físico , Cuero Cabelludo , Síndrome
5.
Br J Surg ; 108(1): 58-65, 2021 01 27.
Artículo en Inglés | MEDLINE | ID: mdl-33640920

RESUMEN

BACKGROUND: Thoracic epidural analgesia (TEA) has been regarded as the standard of care after oesophagectomy for pain control, but has several side-effects. Multimodal (intrathecal diamorphine, paravertebral and rectus sheath catheters) analgesia (MA) may facilitate postoperative mobilization by reducing hypotensive episodes and the need for vasopressors, but uncertainty exists about whether it provides comparable analgesia. This study aimed to determine whether MA provides comparable analgesia to TEA following transthoracic oesophagectomy. METHODS: Consecutive patients undergoing oesophagectomy for cancer between January 2015 and December 2018 were grouped according to postoperative analgesia regimen. Propensity score matching (PSM) was used to account for treatment selection bias. Pain scores at rest and on movement, graded from 0 to 10, were used. The incidence of hypotensive episodes and the requirement for vasopressors were evaluated. RESULTS: The study included 293 patients; 142 (48.5 per cent) received TEA and 151 (51.5 per cent) MA. After PSM, 100 patients remained in each group. Mean pain scores were significantly higher at rest in the MA group (day 1: 1.5 versus 0.8 in the TEA group, P = 0.017; day 2: 1.7 versus 0.9 respectively, P = 0.014; day 3: 1.2 versus 0.6, P = 0.047). Fewer patients receiving MA had a hypotensive episode (25 per cent versus 45 per cent in the TEA group; P = 0.003) and fewer required vasopressors (36 versus 53 per cent respectively; P = 0.016). There was no significant difference in the overall complication rate (71.0 versus 61.0 per cent; P = 0.136). CONCLUSION: MA is less effective than TEA at controlling pain, but this difference may not be clinically significant. However, fewer patients experienced hypotension or required vasopressor support with MA; this may be beneficial within an enhanced recovery programme.


Asunto(s)
Analgesia Epidural/métodos , Analgesia/métodos , Esofagectomía , Dolor Postoperatorio/terapia , Anciano , Neoplasias Esofágicas/cirugía , Esofagectomía/métodos , Femenino , Humanos , Masculino , Persona de Mediana Edad , Dimensión del Dolor , Puntaje de Propensión , Vértebras Torácicas
6.
Phys Rev Lett ; 126(18): 186402, 2021 May 07.
Artículo en Inglés | MEDLINE | ID: mdl-34018766

RESUMEN

The local structure of NaTiSi_{2}O_{6} is examined across its Ti-dimerization orbital-assisted Peierls transition at 210 K. An atomic pair distribution function approach evidences local symmetry breaking preexisting far above the transition. The analysis unravels that, on warming, the dimers evolve into a short range orbital degeneracy lifted (ODL) state of dual orbital character, persisting up to at least 490 K. The ODL state is correlated over the length scale spanning ∼6 sites of the Ti zigzag chains. Results imply that the ODL phenomenology extends to strongly correlated electron systems.

7.
Br J Dermatol ; 185(4): 745-755, 2021 10.
Artículo en Inglés | MEDLINE | ID: mdl-33942286

RESUMEN

BACKGROUND: Bruton tyrosine kinase (BTK) inhibition targets B-cell and other non-T-cell immune cells implicated in the pathophysiology of pemphigus, an autoimmune disease driven by anti-desmoglein autoantibodies. Rilzabrutinib is a new reversible, covalent BTK inhibitor demonstrating preclinical efficacy as monotherapy in canine pemphigus foliaceus. OBJECTIVES: To evaluate the efficacy and safety of oral rilzabrutinib in patients with pemphigus vulgaris in a multicentre, proof-of-concept, phase II trial. METHODS: Patients with Pemphigus Disease Area Index severity scores 8-45 received 12 weeks of oral rilzabrutinib 400-600 mg twice daily and 12 weeks of follow-up. Patients initially received between 0 and ≤ 0·5 mg kg-1 prednisone-equivalent corticosteroid (CS; i.e. 'low dose'), tapered after control of disease activity (CDA; no new lesions, existing lesions healing). The primary endpoints were CDA within 4 weeks on zero-to-low-dose CS and safety. RESULTS: In total, 27 patients with pemphigus vulgaris were included: nine newly diagnosed (33%) and 18 relapsing (67%); 11 had moderate disease (41%) and 16 moderate to severe (59%). The primary endpoint, CDA, was achieved in 14 patients (52%, 95% confidence interval 32-71): 11 using low-dose CS and three using no CS. Over 12 weeks of treatment, mean CS doses reduced from 20·0 to 11·8 mg per day for newly diagnosed patients and from 10·3 to 7·8 mg per day for relapsing patients. Six patients (22%) achieved complete response by week 24, including four (15%) by week 12. Treatment-related adverse events were mostly mild (grade 1 or 2); one patient experienced grade 3 cellulitis. CONCLUSIONS: Rilzabrutinib alone, or with much lower CS doses than usual, was safe, with rapid clinical activity in pemphigus vulgaris. These data suggest that BTK inhibition may be a promising treatment strategy and support further investigation of rilzabrutinib for the treatment of pemphigus.


Asunto(s)
Pénfigo , Inhibidores de Proteínas Quinasas/uso terapéutico , Agammaglobulinemia Tirosina Quinasa , Autoanticuerpos , Humanos , Pénfigo/tratamiento farmacológico , Prednisona
8.
Br J Dermatol ; 185(6): 1221-1231, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34105768

RESUMEN

BACKGROUND: Frontal fibrosing alopecia (FFA) has become one of the most common causes of cicatricial alopecia worldwide. However, there is a lack of clear aetiology and robust clinical trial evidence for the efficacy and safety of agents currently used for treatment. OBJECTIVES: To enable data to be collected worldwide on FFA using common criteria and assessment methods. METHODS: A multicentre, international group of experts in hair loss was convened by email to create consensus recommendations for clinical trials. Consensus was defined at > 90% agreement on each recommended part of these guidelines. RESULTS: Standardized diagnostic criteria, severity rating, staging, and investigator and patient assessment of scalp hair loss and other clinical features of FFA were created. CONCLUSIONS: These guidelines should allow the collection of reliable aggregate data on FFA and advance efforts in both clinical and basic research to close knowledge gaps in this condition.


Asunto(s)
Alopecia , Ensayos Clínicos como Asunto , Guías como Asunto , Liquen Plano , Alopecia/tratamiento farmacológico , Cicatriz/tratamiento farmacológico , Cicatriz/etiología , Consenso , Humanos , Liquen Plano/patología , Cuero Cabelludo/patología
9.
Philos Trans A Math Phys Eng Sci ; 379(2197): 20200221, 2021 May 17.
Artículo en Inglés | MEDLINE | ID: mdl-33775151

RESUMEN

We present the VECMA toolkit (VECMAtk), a flexible software environment for single and multiscale simulations that introduces directly applicable and reusable procedures for verification, validation (V&V), sensitivity analysis (SA) and uncertainty quantication (UQ). It enables users to verify key aspects of their applications, systematically compare and validate the simulation outputs against observational or benchmark data, and run simulations conveniently on any platform from the desktop to current multi-petascale computers. In this sequel to our paper on VECMAtk which we presented last year [1] we focus on a range of functional and performance improvements that we have introduced, cover newly introduced components, and applications examples from seven different domains such as conflict modelling and environmental sciences. We also present several implemented patterns for UQ/SA and V&V, and guide the reader through one example concerning COVID-19 modelling in detail. This article is part of the theme issue 'Reliability and reproducibility in computational science: implementing verification, validation and uncertainty quantification in silico'.

10.
J Eur Acad Dermatol Venereol ; 35(12): 2440-2447, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34415628

RESUMEN

BACKGROUND: Fibrosing alopecia in a pattern distribution (FAPD) is a primary cicatricial alopecia considered a subtype of lichen planopilaris (LPP). OBJECTIVE: The clinical and histopathological features, and treatment response of 24 female patients with FAPD were evaluated. METHODS: Demographic, clinical, histopathological and treatment data of patients with FAPD were retrospectively collected. RESULTS: Twenty-four women were included (mean age 60.7 years). The mean Lichen Planopilaris Activity Index score was 1.50, and the median Sinclair grade was 3. Twelve patients had diffuse alopecia in the centroparietal region, four had frontal accentuation and eight had vertex accentuation of hair loss. Eight had associated loss of facial hair. Predominant trichoscopic features included hair shaft diameter variability (100%), perifollicular erythema and/or scaling (95%) and loss of follicular ostia (95%). Histopathological examination revealed features of scarring alopecia with interface changes in follicular epithelia mainly targeting terminal and intermediate hairs, and less frequently, vellus hairs. Treatment with hair growth-promoting, anti-inflammatory and anti-androgen agents arrested disease progression in 14 patients and resulted in hair regrowth in two patients. Six patients had progression of their hair loss in spite of treatment. LIMITATIONS: Referral bias to a specialist hair clinic, retrospective design and small sample size. CONCLUSIONS: We present clinicopathological features of FAPD which can aid in the diagnosis of this insidious scarring alopecia. Our findings suggest a more favourable outcome if treatment is initiated in early stages of the disease.


Asunto(s)
Alopecia Areata , Liquen Plano , Alopecia/tratamiento farmacológico , Femenino , Humanos , Persona de Mediana Edad , Estudios Retrospectivos , Cuero Cabelludo , Resultado del Tratamiento
11.
J Eur Acad Dermatol Venereol ; 34(11): 2606-2612, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-32779249

RESUMEN

BACKGROUND: The management of chronic alopecia areata (CAA) is challenging. There is currently no therapy that produces consistent successful hair regrowth. Systemic therapies, including prednisolone and steroid-sparing agents (SSA), are often tried in patients with CAA. As there are no head-to-head clinical trials that compare efficacy of one SSA over another, retrospective studies of treatment in clinical practice may help guide clinical practice. OBJECTIVE: To investigate the utility of SSAs in the treatment of AA. METHODS: An electronic medical records search identified patients with AA and those prescribed azathioprine, cyclosporine or methotrexate between 2002 and 2019. Type of AA, treatment duration, reason for cessation, use of concurrent prednisolone, dose of prednisolone and duration of prednisolone use were recorded. The primary outcome was SSA continuation rate at 6 and 12 months. RESULTS: A total of 852 AA patients were identified, among whom 138 patients had been treated with azathioprine, methotrexate or cyclosporine. Of these 138 patients treated with a SSA, 92 (66.7%) continued treatment for at least 12 months: 75.3% (55/73) of azathioprine users, 50% (11/22) of methotrexate users and 60.5% (26/43) of cyclosporine users. At 12 months, 67.3% of azathioprine users required concurrent prednisolone at a mean dose of 5.6 mg daily, 63.6% of methotrexate users required prednisolone at a mean dose of 5 mg daily and 57.7% of cyclosporine users required prednisolone at a mean dose of 8.7 mg daily. The SSA was ceased due to an adverse event in 15.9% of patients and a lack of efficacy in 17.4%. CONCLUSION: The most well-utilized SSA for CAA patients at our clinic was azathioprine. This study highlights that most CAA patients who commence treatment with azathioprine, methotrexate or cyclosporine continue that treatment for at least 12 months and most require concurrent low-dose prednisolone to maintain remission or promote continued hair regrowth.


Asunto(s)
Alopecia Areata , Azatioprina , Alopecia Areata/tratamiento farmacológico , Azatioprina/uso terapéutico , Ciclosporina/uso terapéutico , Humanos , Inmunosupresores/uso terapéutico , Metotrexato/uso terapéutico , Estudios Retrospectivos
12.
Br J Dermatol ; 181(6): 1198-1206, 2019 12.
Artículo en Inglés | MEDLINE | ID: mdl-30919434

RESUMEN

BACKGROUND: Hidradenitis suppurativa (HS), also referred to as acne inversa, is a debilitating skin disease characterized by inflammatory nodules, chronic abscesses and tunnels (fistulae and sinuses). The association with pilonidal sinus disease (PSD) is frequently reported but not well documented. OBJECTIVES: To determine the prevalence and characteristics of inflammatory skin lesions located in the intergluteal fold (IGF) of patients with HS. METHODS: This was an international multicentre retrospective cross-sectional study based on data collection from a large cohort of patients with HS with and without histopathology. Results From a total of 2465 patients with HS included in the study, 661 (27%) reported lesions in the IGF. These patients were significantly more often smokers and had more severe HS. Of the 238 patients with an available clinical diagnosis, intergluteal-HS (IG-HS) was diagnosed in 52 patients (22%) and PSD was diagnosed in 186 patients (78%). IG-HS was associated with the localization of HS in the proximity of the IGF, including the buttocks, genitals and the anus. There was a possibility of misclassification bias in this study as a clinical/image-based diagnosis or histopathology of the IGF lesions was not always available. CONCLUSIONS: The high prevalence of PSD suggests a strong link between both entities. Therefore, it may be useful to identify common pathophysiological mechanisms and develop common therapeutic strategies. What's already known about this topic? The occurrence of pilonidal sinus disease has not been clearly reported among patients with hidradenitis suppurativa/acne inversa. What does this study add? This is the first study that investigated the prevalence of pilonidal sinus disease among a large cohort of patients and identified the patient characteristics. Risk factors that might help to improve the management of patients were identified.


Asunto(s)
Hidradenitis Supurativa/complicaciones , Seno Pilonidal/epidemiología , Adulto , Nalgas , Estudios Transversales , Femenino , Humanos , Masculino , Persona de Mediana Edad , Seno Pilonidal/etiología , Prevalencia , Estudios Retrospectivos , Factores de Riesgo , Adulto Joven
13.
J Eur Acad Dermatol Venereol ; 33(6): 1098-1106, 2019 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-30838709

RESUMEN

BACKGROUND: Efficacy of tildrakizumab for plaque psoriasis was demonstrated in randomized, placebo-controlled trials. OBJECTIVE: To consolidate tildrakizumab efficacy results by pooling data. METHODS: Data (N = 2081) from tildrakizumab 100 mg, tildrakizumab 200 mg and placebo groups in three trials were pooled. RESULTS: Proportions of Psoriasis Area and Severity Index (PASI) 75 responders at week 12 were better with tildrakizumab 100 mg (62.3%) and tildrakizumab 200 mg (64.8%) vs. placebo (5.6%; P < 0.0001) and for PASI 90, PASI 100 and Physician's Global Assessment (PGA) 'clear' or 'minimal' vs. placebo (P < 0.0001). Responses increased from weeks 12 to 28. Week 12 PASI and PGA responses to tildrakizumab vs. placebo were numerically greater in patients with lower vs. higher bodyweight and were better with tildrakizumab 200 mg than tildrakizumab 100 mg for patients with higher bodyweight. Week 12 PASI 75 responses vs. placebo with tildrakizumab 100 mg were similar between patients with (55.0%) or without (56.7%) prior biologics. PASI 90, PASI 100 and PGA responses were generally higher in patients without prior biologics. Week 8 PASI 50 response predicted PASI 90 response. CONCLUSION: Pooled data confirmed the efficacy of tildrakizumab for moderate-to-severe plaque psoriasis.


Asunto(s)
Anticuerpos Monoclonales Humanizados/uso terapéutico , Fármacos Dermatológicos/uso terapéutico , Psoriasis/tratamiento farmacológico , Ensayos Clínicos Controlados Aleatorios como Asunto , Adulto , Anticuerpos Monoclonales Humanizados/administración & dosificación , Fármacos Dermatológicos/administración & dosificación , Relación Dosis-Respuesta a Droga , Femenino , Humanos , Masculino , Persona de Mediana Edad , Estudios Multicéntricos como Asunto , Placebos , Índice de Severidad de la Enfermedad , Resultado del Tratamiento
14.
Br J Surg ; 105(7): 900-906, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29601082

RESUMEN

BACKGROUND: Neoadjuvant chemotherapy may have a detrimental impact on cardiorespiratory reserve. Determination of oxygen uptake at the anaerobic threshold by cardiopulmonary exercise testing (CPET) provides an objective measure of cardiorespiratory reserve. Anaerobic threshold can be used to predict perioperative risk. A low anaerobic threshold is associated with increased morbidity after oesophagogastrectomy. The aim of this study was to establish whether neoadjuvant chemotherapy has an adverse effect on fitness, and whether there is recovery of fitness before surgery for oesophageal and gastric adenocarcinoma. METHODS: CPET was completed before, immediately after (week 0), and at 2 and 4 weeks after neoadjuvant chemotherapy. The ventilatory anaerobic threshold and peak oxygen uptake (Vo2 peak) were used as objective, reproducible measures of cardiorespiratory reserve. Anaerobic threshold and Vo2 peak were compared before and after neoadjuvant chemotherapy, and at the three time intervals. RESULTS: Some 31 patients were recruited. The mean anaerobic threshold was lower following neoadjuvant treatment: 15·3 ml per kg per min before chemotherapy versus 11·8, 12·1 and 12·6 ml per kg per min at week 0, 2 and 4 respectively (P < 0·010). Measurements were also significantly different at each time point (P < 0·010). The same pattern was noted for Vo2 peak between values before chemotherapy (21·7 ml per kg per min) and at weeks 0, 2 and 4 (17·5, 18·6 and 19·3 ml per kg per min respectively) (P < 0·010). The reduction in anaerobic threshold and Vo2 peak did not improve during the time between completion of neoadjuvant chemotherapy and surgery. CONCLUSION: There was a decrease in cardiorespiratory reserve immediately after neoadjuvant chemotherapy that was sustained up to the point of surgery at 4 weeks after chemotherapy.


Asunto(s)
Adenocarcinoma/tratamiento farmacológico , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Capacidad Cardiovascular , Neoplasias Esofágicas/tratamiento farmacológico , Terapia Neoadyuvante , Neoplasias Gástricas/tratamiento farmacológico , Adenocarcinoma/fisiopatología , Adenocarcinoma/cirugía , Adulto , Anciano , Anciano de 80 o más Años , Umbral Anaerobio , Quimioterapia Adyuvante , Neoplasias Esofágicas/fisiopatología , Neoplasias Esofágicas/cirugía , Esofagectomía , Prueba de Esfuerzo , Estudios de Factibilidad , Femenino , Gastrectomía , Humanos , Masculino , Persona de Mediana Edad , Consumo de Oxígeno , Estudios Prospectivos , Neoplasias Gástricas/fisiopatología , Neoplasias Gástricas/cirugía
15.
Phys Rev Lett ; 120(22): 227201, 2018 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-29906141

RESUMEN

We present measurements on a series of materials, Li_{2}In_{1-x}Sc_{x}Mo_{3}O_{8}, that can be described as a 1/6th-filled breathing kagome lattice. Substituting Sc for In generates chemical pressure which alters the breathing parameter nonmonotonically. Muon spin rotation experiments show that this chemical pressure tunes the system from antiferromagnetic long range order to a quantum spin liquid phase. A strong correlation with the breathing parameter implies that it is the dominant parameter controlling the level of magnetic frustration, with increased kagome symmetry generating the quantum spin liquid phase. Magnetic susceptibility measurements suggest that this is related to distinct types of charge order induced by changes in lattice symmetry, in line with the theory of Chen et al. [Phys. Rev. B 93, 245134 (2016)PRBMDO2469-995010.1103/PhysRevB.93.245134]. The specific heat for samples at intermediate Sc concentration, which have the minimum breathing parameter, show consistency with the predicted U(1) quantum spin liquid.

16.
Br J Dermatol ; 179(3): 615-622, 2018 09.
Artículo en Inglés | MEDLINE | ID: mdl-29742274

RESUMEN

BACKGROUND: Short-term interleukin-23p19 inhibition by tildrakizumab improves plaque psoriasis and appears to be well tolerated. OBJECTIVES: Safety and tolerability were assessed for up to 64 weeks of tildrakizumab therapy using pooled data from three randomized controlled trials for moderate-to-severe psoriasis. METHODS: Data pools for the placebo-controlled (up to 16 weeks) and full trial periods (up to 64 weeks) were analysed (n = 2081). RESULTS: In the placebo-controlled period, frequencies of treatment-emergent adverse events (TEAEs; range 47·9-54·0%), serious TEAEs (range 1·4-2·3%), discontinuations due to AEs (range 0·6-1·9%), major adverse cardiovascular events (MACEs; range 0·0-0·1%) and severe infections (range 0·0-0·3%) were comparable between tildrakizumab 100 mg, tildrakizumab 200 mg, placebo and etanercept. In the full trial period, exposure-adjusted rates (patients per 100 patient-years) for TEAEs, serious TEAEs and discontinuations due to AEs with tildrakizumab 100 mg and 200 mg were lower than or comparable with the placebo rates, and lower than with etanercept. Exposure-adjusted rates of MACEs (range 0·0-0·5) and severe infections (range 0·9-2·0) were comparable among groups. No TEAEs of inflammatory bowel disease or suicide were reported. Candida skin infections were infrequent at frequencies of 0·1%, 0·3%, 0·0% and 0·0% for the tildrakizumab 100 mg, tildrakizumab 200 mg, placebo and etanercept groups, respectively, in the placebo-controlled period, and exposure-adjusted rates of 0·2, 0·7, 0·0 and 0·0, respectively, in the full trial period. Oral candidiasis was also infrequent. CONCLUSIONS: Up to 64 weeks of tildrakizumab was well tolerated, with low rates of serious TEAEs, discontinuations due to AEs, and AEs of clinical interest.


Asunto(s)
Anticuerpos Monoclonales/administración & dosificación , Inmunosupresores/administración & dosificación , Psoriasis/tratamiento farmacológico , Adulto , Anticuerpos Monoclonales/efectos adversos , Anticuerpos Monoclonales Humanizados , Candida albicans/inmunología , Candida albicans/aislamiento & purificación , Candidiasis/epidemiología , Candidiasis/inmunología , Candidiasis/microbiología , Enfermedades Cardiovasculares/inducido químicamente , Enfermedades Cardiovasculares/epidemiología , Enfermedades Cardiovasculares/inmunología , Ensayos Clínicos Fase II como Asunto , Ensayos Clínicos Fase III como Asunto , Relación Dosis-Respuesta a Droga , Etanercept/administración & dosificación , Etanercept/efectos adversos , Femenino , Humanos , Inmunosupresores/efectos adversos , Enfermedades Inflamatorias del Intestino/epidemiología , Enfermedades Inflamatorias del Intestino/inmunología , Subunidad p19 de la Interleucina-23/antagonistas & inhibidores , Subunidad p19 de la Interleucina-23/inmunología , Masculino , Persona de Mediana Edad , Placebos/administración & dosificación , Placebos/efectos adversos , Psoriasis/diagnóstico , Psoriasis/inmunología , Ensayos Clínicos Controlados Aleatorios como Asunto , Índice de Severidad de la Enfermedad , Factores de Tiempo , Resultado del Tratamiento
17.
Dermatol Ther ; 31(6): e12741, 2018 11.
Artículo en Inglés | MEDLINE | ID: mdl-30226287

RESUMEN

Topical minoxidil is the only US FDA approved OTC drug for the treatment of androgenetic alopecia (AGA). Minoxidil is a pro-drug converted into its active form, minoxidil sulfate, by the sulfotransferase enzymes in the outer root sheath of hair follicles. Previously, we demonstrated that sulfotransferase activity in hair follicles predicts response to topical minoxidil in the treatment of AGA. In the human liver, sulfotransferase activity is significantly inhibited by salicylic acid. Low-dose OTC aspirin (75-81 mg), a derivative of salicylic acid, is used by millions of people daily for the prevention of coronary heart disease and cancer. It is not known whether oral aspirin inhibits sulfotransferase activity in hair follicles, potentially affecting minoxidil response in AGA patients. In the present study, we determined the follicular sulfotransferase enzymatic activity following 14 days of oral aspirin administration. In our cohort of 24 subjects, 50% were initially predicted to be responders to minoxidil. However, following 14 days of aspirin administration, only 27% of the subjects were predicted to respond to topical minoxidil. To the best of our knowledge, this is the first study to report the effect of low-dose daily aspirin use on the efficacy of topical minoxidil.


Asunto(s)
Alopecia/tratamiento farmacológico , Aspirina/administración & dosificación , Inhibidores Enzimáticos/administración & dosificación , Folículo Piloso/efectos de los fármacos , Minoxidil/administración & dosificación , Profármacos/administración & dosificación , Sulfotransferasas/antagonistas & inhibidores , Administración Cutánea , Adulto , Alopecia/diagnóstico , Alopecia/fisiopatología , Aspirina/efectos adversos , Interacciones Farmacológicas , Inhibidores Enzimáticos/efectos adversos , Folículo Piloso/enzimología , Folículo Piloso/crecimiento & desarrollo , Humanos , Masculino , Minoxidil/análogos & derivados , Minoxidil/metabolismo , Profármacos/metabolismo , Medición de Riesgo , Sulfotransferasas/metabolismo , Resultado del Tratamiento , Adulto Joven
18.
Dis Esophagus ; 31(6)2018 Jun 01.
Artículo en Inglés | MEDLINE | ID: mdl-29800270

RESUMEN

Thoracic epidural (TE) analgesia has been the standard of care for transthoracic esophagectomy patients since the 1990s. Multimodal anesthesia using intrathecal diamorphine, local anesthetic infusion catheters (LAC) into the paravertebral space and rectus sheaths and intravenous opioid postoperatively represent an alternative option for postoperative analgesia. While TE can provide excellent pain control, it may inhibit early postoperative recovery by causing hypotension and reducing mobilization. The aim of this study is to determine whether multimodal analgesia with LAC was effective with respect to adequate pain management, and compare its impact on hypotension and mobility. Patients receiving multimodal LAC analgesia were matched using propensity score matching to patients undergoing two-phase trans-thoracic esophagectomy with a TE over a two-year period (from January 2015 to December 2016). Postoperative endpoints that had been evaluated prospectively, including pain scores on movement and at rest, inotrope or vasoconstrictor requirements, and hypotension (systolic BP < 90 mmHg), were compared between cohorts. Out of 14 patients (13 male) that received LAC were matched to a cohort of 14 patients on age, sex, and comorbidity. Mean and maximum pain scores at rest and movement on postoperative days 0 to 3 were equivalent between the groups. In both cohorts, 50% of patients had a pain score of more than 7 on at least one occasion. Fewer patients in the LAC group required vasoconstrictor infusion (LAC: 36% vs. TE: 57%, P = 0.256) to maintain blood pressure or had episodes of hypotension (LAC: 43% vs. TE: 79%, P = 0.05). The LAC group was more able to ambulate on the first postoperative day (LAC: 64% vs. TE: 43%, P = 0.14) but these differences were not statistically significant. Within the epidural cohort, three patients had interruption of epidural due to dislodgement or failure of block compared to no disruption in the multimodal local anesthesia catheters group (P = 0.05). Therefore, multimodal anesthesia using spinal diamorphine with combined paravertebral and rectus sheath local anesthetic catheters appears to provide comparable pain relief post two-phase esophagectomy and may provide more reliable and safe analgesia than the current standard of care.


Asunto(s)
Analgesia Epidural/métodos , Analgesia/métodos , Analgésicos Opioides/administración & dosificación , Esofagectomía/efectos adversos , Heroína/administración & dosificación , Dolor Postoperatorio/tratamiento farmacológico , Toracotomía/efectos adversos , Anciano , Analgesia/instrumentación , Catéteres , Esofagectomía/métodos , Esofagectomía/rehabilitación , Femenino , Humanos , Inyecciones Espinales , Masculino , Persona de Mediana Edad , Dolor Postoperatorio/etiología , Estudios Retrospectivos , Toracotomía/métodos , Toracotomía/rehabilitación , Resultado del Tratamiento
19.
Br J Dermatol ; 186(2): 206-207, 2022 02.
Artículo en Inglés | MEDLINE | ID: mdl-34617588

Asunto(s)
Alopecia Areata , Humanos
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