Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 761
Filtrar
Mais filtros

Intervalo de ano de publicação
1.
Pharmacol Res ; 202: 107130, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38447748

RESUMO

Pharmacology has broadened its scope considerably in recent decades. Initially, it was of interest to chemists, doctors and pharmacists. In recent years, however, it has been incorporated into the teaching of biologists, molecular biologists, biotechnologists, chemical engineers and many health professionals, among others. Traditional teaching methods, such as lectures or laboratory work, have been superseded by the use of new pedagogical approaches to enable a better conceptualization and understanding of the discipline. In this article, we present several new methods that have been used in Spanish universities. Firstly, we describe a teaching network that has allowed the sharing of pedagogical innovations in Spanish universities. A European experience to improve prescribing safety is described in detail. The use of popular films and medical TV series in biomedical students shows how these audiovisual resources can be helpful in teaching pharmacology. The use of virtual worlds is detailed to introduce this new approach to teaching. The increasingly important area of the social aspects of pharmacology is also considered in two sections, one devoted to social pharmacology and the other to the use of learning based on social services to improve understanding of this important area. Finally, the use of Objective Structured Clinical Evaluation in pharmacology allows to know how this approach can help to better evaluate clinical pharmacology students. In conclusion, this article allows to know new pedagogical methods resources used in some Spanish universities that may help to improve the teaching of pharmacology.


Assuntos
Farmacologia Clínica , Farmacologia , Humanos , Aprendizagem , Farmacologia Clínica/educação , Pessoal de Saúde , Farmacologia/educação
2.
Prev Med ; 156: 106960, 2022 03.
Artigo em Inglês | MEDLINE | ID: mdl-35065979

RESUMO

The global confrontation with COVID-19 has not only diverted current healthcare resources to deal with the infection but has also resulted in increased resources in the areas of testing and screening, as well as educating most of the global public of the benefits of vaccination. When the COVID-19 pandemic eventually recedes, the opportunity must not be missed to ensure that these newly created resources are maintained and redeployed for use in testing and immunisation against other vaccine-preventable infectious diseases. A notable example is infection by human papillomavirus (HPV), the commonest sexually transmitted human virus and the leading cause of a variety of cancers in both men and women, such as cervical, head and neck, anal, vaginal, vulvar and penile cancers. The most important is cervical cancer, the objective of the global elimination goals targeting the vaccination of young female and male adolescents, screening all women and treatment of all infected women. As the campaigns to control SARS-CoV-2, the eradication of HPV-induced cancers also relies on effective prevention and control programs. The lessons learned and the technical, logistical and human resources which have been established to combat COVID-19 by vaccination and testing must be applied to the eradication of other infections which affect the global population. This commentary summarizes the opportunities that the COVID-19 pandemic has created for HPV prevention and control, lists the already available tools for HPV control, and emphasizes the potential public health threats amidst the ongoing COVID-19 pandemic.


Assuntos
Alphapapillomavirus , COVID-19 , Infecções por Papillomavirus , Vacinas contra Papillomavirus , Neoplasias do Colo do Útero , Adolescente , COVID-19/prevenção & controle , Feminino , Humanos , Masculino , Pandemias/prevenção & controle , Papillomaviridae , Infecções por Papillomavirus/epidemiologia , Vacinas contra Papillomavirus/uso terapêutico , SARS-CoV-2 , Neoplasias do Colo do Útero/diagnóstico , Vacinação
3.
Acute Med ; 21(3): 157-160, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36427217

RESUMO

Point-of-care ultrasound (POCUS) integrates imaging into the physical examination at the bedside. This offers the advantage of instant clinical information and has shown to speed up the diagnostic process, and to improve diagnostic accuracy and correct treatment.


Assuntos
Sistemas Automatizados de Assistência Junto ao Leito , Testes Imediatos , Humanos , Medicina Interna , Ultrassonografia , Exame Físico
4.
Br J Cancer ; 123(4): 510-517, 2020 08.
Artigo em Inglês | MEDLINE | ID: mdl-32507855

RESUMO

This paper summarises the position of ESGO and EFC on cervical screening based on existing guidelines and opinions of a team of lead experts. HPV test is replacing cytology as this offers greater protection against cervical cancer and allows longer screening intervals. Only a dozen of HPV tests are considered as clinically validated for screening. The lower specificity of HPV test dictates the use of triage tests that can select women for colposcopy. Reflex cytology is currently the only well validated triage test; HPV genotyping and p16 immunostaining may be used in the future, although methylation assays and viral load also look promising. A summary of quality assurance benchmarks is provided, and the importance to audit the screening histories of women who developed cancer is noted as a key objective. HPV-based screening is more cost-effective than cytology or cotesting. HPV-based screening should continue in the post-vaccination era. Only a fraction of the female population is vaccinated, and this varies across countries. A major challenge will be to personalise screening frequency according to vaccination status. Still the most important factor for successful prevention by screening is high population coverage and organised screening. Screening with self-sampling to reach under-screened women is promising.


Assuntos
Colo do Útero/virologia , Papillomaviridae/isolamento & purificação , Infecções por Papillomavirus/diagnóstico , Neoplasias do Colo do Útero/virologia , Consenso , Inibidor p16 de Quinase Dependente de Ciclina/metabolismo , Detecção Precoce de Câncer , Feminino , Técnicas de Genotipagem , Humanos , Papillomaviridae/genética , Infecções por Papillomavirus/metabolismo , Vacinas contra Papillomavirus/uso terapêutico , Guias de Prática Clínica como Assunto , Gravidez , Sensibilidade e Especificidade , Vacinação/estatística & dados numéricos , Carga Viral
5.
Prev Med ; 138: 106166, 2020 09.
Artigo em Inglês | MEDLINE | ID: mdl-32565118

RESUMO

Extensive multiple-age cohort human papillomavirus (HPV) vaccination has proved to be highly effective. We aimed to determine the 8-year population impact of a female single-age cohort HPV vaccination programme on the incidence of anogenital warts (AGW). In 2008, Catalonia initiated a school-based quadrivalent HPV vaccination programme targeting 11-year-old girls, achieving coverage over 80%. Data on diagnoses of AGW and genital herpes were obtained from a population-based database of electronic health records covering 74% of the population. The annual incidence rates from 2009 to 2016 were calculated, stratified by age and sex using Joinpoint regression to estimate trends and annual percentage changes (APC). Among women aged 16-19 years, the AGW incidence decreased by 61% from 2012 to 2016 (APC -19.4%; 95% CI: -30.0 to -7.3). In contrast, the incidence of genital herpes in same-aged women increased throughout the study period (APC 11.1%; 95% CI: 7.2-15.2). Among men aged 20-22 years, the increasing incidence of AGW shifted to a downward trend in 2013 (APC 2009-2013: 17.0%; 95% CI: 8.2-26.5; and APC 2013-2016: -4.5%; 95% CI: -14.6 to 6.9). A similar pattern was observed among men aged 23-25 years (APC 2009-2014: 16.0%; 95% CI: 12.0-20.2; and APC 2014-2016: -6.0%; 95% CI: -18.4 to 8.3). In contrast to AGW, among men aged 20-25 years, the incidence of genital herpes increased over this period. Our study strongly suggests that a single-cohort HPV vaccination strategy with high vaccine uptake not only provides direct benefit in the vaccinated cohorts but also extends protection through a herd effect to unvaccinated men.


Assuntos
Alphapapillomavirus , Condiloma Acuminado , Infecções por Papillomavirus , Vacinas contra Papillomavirus , Criança , Condiloma Acuminado/epidemiologia , Condiloma Acuminado/prevenção & controle , Feminino , Humanos , Incidência , Masculino , Infecções por Papillomavirus/epidemiologia , Infecções por Papillomavirus/prevenção & controle , Espanha/epidemiologia , Vacinação
6.
Neth Heart J ; 28(7-8): 410-417, 2020 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-32643071

RESUMO

BACKGROUND: Previous studies have reported on myocardial injury in patients with coronavirus infectious disease 19 (COVID-19) defined as elevated cardiac biomarkers. Whether elevated biomarkers truly represent myocardial dysfunction is not known. The aim of this study was to explore the incidence of ventricular dysfunction and assess its relationship with biomarker analyses. METHODS: This cross-sectional study ran from April 1 to May 12, 2020, and consisted of all consecutively admitted patients to the Radboud university medical centre nursing ward for COVID-19. Laboratory assessment included high-sensitivity Troponin T and N­terminal pro-B-type natriuretic peptide (NT-proBNP). Echocardiographic evaluation focused on left and right ventricular systolic function and global longitudinal strain (GLS). RESULTS: In total, 51 patients were included, with a median age of 63 years (range 51-68 years) of whom 80% was male. Troponin T was elevated (>14 ng/l) in 47%, and a clinically relevant Troponin T elevation (10â€¯× URL) was found in three patients (6%). NT-proBNP was elevated (>300 pg/ml) in 24 patients (47%), and in four (8%) the NT-proBNP concentration was >1,000 pg/ml. Left ventricular dysfunction (ejection fraction <52% and/or GLS >-18%) was observed in 27%, while right ventricular dysfunction (TAPSE <17 mm and/or RV S' < 10 cm/s) was seen in 10%. There was no association between elevated Troponin T or NT-proBNP and left or right ventricular dysfunction. Patients with confirmed pulmonary embolism had normal right ventricular function. CONCLUSIONS: In hospitalised patients, it seems that COVID-19 predominantly affects the respiratory system, while cardiac dysfunction occurs less often. Based on a single echocardiographic evaluation, we found no relation between elevated Troponin T or NT-proBNP, and ventricular dysfunction. Echocardiography has limited value in screening for ventricular dysfunction.

7.
Phys Rev Lett ; 121(13): 130602, 2018 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-30312073

RESUMO

A novel formulation of fluid dynamics as a kinetic theory with tailored, on-demand constructed particles removes restrictions on flow speed and temperature as compared to its predecessors, the lattice Boltzmann methods and their modifications. In the new kinetic theory, discrete particles are determined by a rigorous limit process which avoids ad hoc assumptions about their velocities. Classical benchmarks for incompressible and compressible flows demonstrate that the proposed discrete-particles kinetic theory opens up an unprecedented wide domain of applications for computational fluid dynamics.

8.
Ann Hematol ; 97(12): 2417-2424, 2018 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-30116871

RESUMO

Burkitt's monomorphic posttransplant lymphoproliferative disorder (B-PTLD) is an uncommon subtype of PTLD. Owing to the paucity of this complication, clinical characteristics and outcome has not been fully described. Clinical characteristics and outcomes of 20 patients diagnosed with B-PTLD from 10 transplant centers belonging to the GEL/TAMO group were reviewed. Median time from transplant to B-PTLD was 7.2 years. All the cases fulfill the morphologic and genetic criteria of B-PTLD, whereas Epstein-Barr virus (EBV) was detected in 70% of cases. Patients were treated with different chemotherapy combinations, and three patients received upfront rituximab monotherapy. The great majority of patients receiving CHOP-like regimens attained a complete response (CR) (73%), similar to that obtained with dose-intensive chemotherapy (83% CR). In contrast, patients receiving upfront rituximab monotherapy required subsequent chemotherapy. Two patients (10%) died during treatment due to infection. The median progression-free survival and overall survival (OS) were 16 months and 139 months, respectively. When analyzing variables predicting for OS, we found that patients with bone marrow involvement had an adverse prognosis, with a median OS of 6 months (p = 0.008). In conclusion, B-PTLD is an uncommon complication usually associated with EBV infection and with an aggressive clinical course, particularly in patients with bone marrow involvement. High-dose chemoimmunotherapy obtained similar responses to R-CHOP, suggesting that R-CHOP could be an adequate alternative for these patients. In contrast, rituximab monotherapy does not seem to be effective enough to control the disease.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Linfoma de Burkitt , Transplante de Células-Tronco Hematopoéticas , Transplante de Órgãos , Adulto , Idoso , Aloenxertos , Anticorpos Monoclonais Murinos/administração & dosagem , Linfoma de Burkitt/sangue , Linfoma de Burkitt/tratamento farmacológico , Linfoma de Burkitt/etiologia , Linfoma de Burkitt/mortalidade , Ciclofosfamida/administração & dosagem , Intervalo Livre de Doença , Doxorrubicina/administração & dosagem , Feminino , Herpesvirus Humano 4 , Humanos , Masculino , Pessoa de Meia-Idade , Prednisona/administração & dosagem , Rituximab , Taxa de Sobrevida , Vincristina/administração & dosagem
9.
Plant Dis ; 102(5): 837-854, 2018 May.
Artigo em Inglês | MEDLINE | ID: mdl-30673389

RESUMO

In recent years, mathematical modeling has increasingly been used to complement experimental and observational studies of biological phenomena across different levels of organization. In this article, we consider the contribution of mathematical models developed using a wide range of techniques and uses to the study of plant virus disease epidemics. Our emphasis is on the extent to which models have contributed to answering biological questions and indeed raised questions related to the epidemiology and ecology of plant viruses and the diseases caused. In some cases, models have led to direct applications in disease control, but arguably their impact is better judged through their influence in guiding research direction and improving understanding across the characteristic spatiotemporal scales of plant virus epidemics. We restrict this article to plant virus diseases for reasons of length and to maintain focus even though we recognize that modeling has played a major and perhaps greater part in the epidemiology of other plant pathogen taxa, including vector-borne bacteria and phytoplasmas.


Assuntos
Vetores de Doenças , Doenças das Plantas/virologia , Vírus de Plantas/genética , Animais , Modelos Biológicos , Vírus de Plantas/fisiologia
10.
Rep Pract Oncol Radiother ; 23(6): 484-494, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30534011

RESUMO

Simulation models are commonly used to address important health policy issues that cannot be explored through experimental studies. These models are especially useful to determine a set of strategies that result in a good value for money (cost-effectiveness). Several mathematical models simulating the natural history of HPV and related diseases, especially cervical cancer, have been developed to calculate a relative effectiveness and cost-effectiveness of HPV vaccination and cervical cancer screening interventions. Virtually all cost-effectiveness analyses identify HPV vaccination programmes for preadolescent girls to be cost-effective, even for relatively low vaccination coverage rates. Routine vaccination of preadolescent girls is the primary target population for HPV vaccination as it shows to provide the greatest health impact. Cost-effectiveness analyses assessing other vaccine target groups are less conclusive. Adding additional age-cohorts would accelerate health benefits in some years, although cost-effectiveness becomes less favourable as age at vaccination increases. Including men in HPV vaccination programmes may be a less efficient strategy if done at the expense of female vaccination coverage for reducing the burden of HPV in the population. However, as the HPV vaccine price decreases, the cost-effectiveness of universal vaccination improves, becoming equally as efficient as female-only vaccination. Vaccine price is a decisive factor in the cost-effectiveness analyses. The lower the price, the greater the likelihood that vaccination groups other than the primary target would be considered cost-effective.

11.
Int J Cancer ; 140(9): 2092-2100, 2017 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-28187495

RESUMO

Human Papillomavirus 16 (HPV16) causes 70% of invasive cervical cancers (ICC) worldwide. Interaction between HPV16 genetic diversity, host genetics and target tissue largely determine the chances to trigger carcinogenesis. We have analyzed the differential prevalence of viral variants in 233 HPV16-monoinfected squamous (SCC), glandular (ADC) and mixed (ADSC) ICCs from four continents, assessing the contribution of geographical origin and cancer histology. We have further quantified the contribution of viral variants and cancer histology to differences in age at tumor diagnosis. The model fitted to the data explained 97% of the total variance: the largest explanatory factors were differential abundance among HPV16 variants (78%) and their interaction with cancer histology (9.2%) and geography (10.1%). HPV16_A1-3 variants were more prevalent in SCC while HPV16_D variants were increased in glandular ICCs. We confirm further a non-random geographical structure of the viral variants distribution. ADCs were diagnosed at younger ages than SCCs, independently of the viral variant triggering carcinogenesis. HPV16 variants are differentially associated with histological ICCs types, and ADCs are systematically diagnosed in younger women. Our results have implications for the implementation of cervical cancer screening algorithms, to ensure proper early detection of elusive ADCs.


Assuntos
Adenocarcinoma/virologia , Carcinoma Adenoescamoso/virologia , Carcinoma de Células Escamosas/virologia , Neoplasias do Colo do Útero/virologia , Adenocarcinoma/epidemiologia , Adenocarcinoma/patologia , Adulto , Idoso , Carcinoma Adenoescamoso/epidemiologia , Carcinoma Adenoescamoso/patologia , Carcinoma de Células Escamosas/epidemiologia , Carcinoma de Células Escamosas/patologia , Feminino , Genótipo , Papillomavirus Humano 16/genética , Papillomavirus Humano 16/isolamento & purificação , Papillomavirus Humano 16/patogenicidade , Humanos , Pessoa de Meia-Idade , Infecções por Papillomavirus/virologia , Filogenia , Neoplasias do Colo do Útero/epidemiologia , Neoplasias do Colo do Útero/patologia , Proteínas Virais/genética
12.
Br J Cancer ; 116(9): 1218-1222, 2017 Apr 25.
Artigo em Inglês | MEDLINE | ID: mdl-28376081

RESUMO

BACKGROUND: Squamous cell scrotal carcinoma (SCSC) is an infrequent skin cancer associated historically with occupational carcinogens. Human papillomavirus (HPV) DNA has been associated with SCSC but there is no definitive proof of its oncogenic role. METHODS: Human papillomavirus-DNA and -E6*I mRNA were analysed in six invasive histologically typed SCSC. LCM-PCR was used to localise HPV DNA to tumour cells. P16INK4aand p53 expression were studied by immunohistochemistry. RESULTS: In three warty or basaloid SCSC HPV16-DNA and E6*I-mRNA were detected. LCM-PCR confirmed HPV16 was in p16INK4a-positive malignant cells. However, of three usual-type SCSC, all were HPV-negative and two expressed p53 protein but not p16INK4a. CONCLUSIONS: Human papillomavirus 16 was present in tumour cells and oncogenically active in basaloid and warty SCSC, whereas usual SCSC was HPV-negative and showed immunostaining, suggesting p53 mutation. The dual pathways of oncogenesis and relation between histological type of SCSC and HPV are similar to that in penile cancers.


Assuntos
Carcinoma de Células Escamosas/virologia , Inibidor p16 de Quinase Dependente de Ciclina/biossíntese , Papillomavirus Humano 16/isolamento & purificação , Proteínas Oncogênicas Virais/biossíntese , Neoplasias Penianas/virologia , Proteínas Repressoras/biossíntese , Proteína Supressora de Tumor p53/biossíntese , Adulto , Idoso , Carcinoma de Células Escamosas/diagnóstico , Carcinoma de Células Escamosas/genética , Carcinoma de Células Escamosas/patologia , Inibidor p16 de Quinase Dependente de Ciclina/genética , DNA Viral/isolamento & purificação , Regulação Neoplásica da Expressão Gênica , Papillomavirus Humano 16/genética , Papillomavirus Humano 16/patogenicidade , Humanos , Masculino , Pessoa de Meia-Idade , Mutação , Proteínas Oncogênicas Virais/genética , Infecções por Papillomavirus/diagnóstico , Infecções por Papillomavirus/virologia , Neoplasias Penianas/diagnóstico , Neoplasias Penianas/genética , Neoplasias Penianas/patologia , Proteínas Repressoras/genética , Proteína Supressora de Tumor p53/genética
13.
Ann Rheum Dis ; 76(5): 878-881, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-27899374

RESUMO

BACKGROUND: In inflammatory bowel disease (IBD), a new biological therapy has recently been approved. Vedolizumab is a humanised IgG1 monoclonal antibody to α4ß7 integrin that modulates gut lymphocyte trafficking. Although an exclusively local effect of vedolizumab could be expected based on the restricted presence of the α4ß7-mucosal vascular addressin cell adhesion molecule 1 complex in the gut, past combined success with anti-tumour necrosis factor, and previous demonstration of α4ß7 integrin in the joint, led to the expectation of a therapeutic efficacy in spondyloarthritis. Nonetheless, the effect of vedolizumab on extraintestinal manifestations-and especially the joint-has not been reported so far. CASE REPORT: A series of five patients with IBD who were treated with vedolizumab and promptly developed new onset or exacerbation of sacroiliitis or arthritis are reported. CONCLUSIONS: Vedolizumab therapy does not seem to show any efficacy in and might even induce arthritis and/or sacroiliitis. However, larger cohort studies are needed to provide information on the prevalence, the evolution and underlying mechanism.


Assuntos
Anticorpos Monoclonais Humanizados/efeitos adversos , Fármacos Gastrointestinais/efeitos adversos , Sacroileíte/induzido quimicamente , Espondilite Anquilosante/induzido quimicamente , Exacerbação dos Sintomas , Adulto , Colite Ulcerativa/tratamento farmacológico , Doença de Crohn/tratamento farmacológico , Feminino , Humanos , Masculino , Pessoa de Meia-Idade
14.
J Theor Biol ; 428: 153-167, 2017 09 07.
Artigo em Inglês | MEDLINE | ID: mdl-28625474

RESUMO

Insect management strategies for agricultural crop pests must reduce selection for insecticide resistant mutants while providing effective control of the insect pest. One management strategy that has long been advocated is the application of insecticides at the maximum permitted dose. This has been found, under some circumstances, to be able to prevent the resistance allele frequency from increasing. However this approach may, under different circumstances, lead to rapid selection for resistance to the insecticide. To test when a high dose would be an effective resistance management strategy, we present a flexible deterministic model of a population of an insect pest of agricultural crops. The model includes several possible life-history traits including sexual or asexual reproduction, diploid or haplodiploid genetics, univoltine or multivoltine life cycle, so that the high dose strategy can be tested for many different insect pests. Using this model we aim to identify the key characteristics of pests that make either a high dose or a low dose of insecticide optimal for resistance management. Two outputs are explored: firstly whether the frequency of the resistance allele increases over time or remains low indefinitely; and secondly whether lowering the dose of insecticide applied reduces or increases the rate of selection for the resistance allele. It is demonstrated that with high immigration resistance can be suppressed. This suppression however, is rarely lost if the insecticide dose is reduced, and is absent altogether when individuals move from the treated population back into an untreated population. Reducing the dose of insecticide often resulted in slower development of resistance, except where the population combined a high influx of less resistant individuals into the treated population, a recessive resistance gene and a high efficacy, in which case reducing the dose of insecticide could result in faster selection for resistance.


Assuntos
Resistência a Inseticidas/efeitos dos fármacos , Inseticidas/toxicidade , Animais , Frequência do Gene , Controle de Insetos , Insetos/efeitos dos fármacos , Resistência a Inseticidas/genética , Modelos Teóricos , Fatores de Tempo
15.
Eur Radiol ; 27(5): 2024-2030, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-27651143

RESUMO

OBJECTIVES: To determine the diagnostic value of MR signal within the sacroiliac (SI) joint space in spondyloarthritis (SpA). METHODS: A retrospective analysis of MRIs of SI joints was performed in 363 patients, aged 16-45 years, clinically suspected of sacroiliitis. Intra-articular SI joint MR signals were categorized as normal, high T1 signal, fluid signal, ankylosis or vacuum phenomenon (VP). These MRI findings were correlated with the final diagnosis, according to the ASAS criteria. Sensitivity, specificity, and positive and negative likelihood ratios (LR) and predictive values were calculated. RESULTS: Presence of intra-articular high T1 signal, fluid signal and ankylosis had a specificity of 95.8 %, 95.3 % and 99.5 % for SpA. High T1 signal, fluid signal and ankylosis were present in 38.4 %, 19.2 % and 17.9 % of SpA patients and in 4.2 %, 4.7 % and 0.5 % of patients without SpA, resulting in LR+ of 9.0, 4.1 and 37.9, respectively. VP was present in 13.2 % of SpA patients and in 20.8 % of patients without SpA, resulting in an LR+ of 0.6. CONCLUSIONS: Presence of high T1 signal, fluid signal and ankylosis within the SI joint on MRI have high specificity for SpA. High T1 signal is the most sensitive MRI feature within the SI joint for SpA. KEY POINTS: • MRI of the SI joints is typically obtained for diagnosis of spondyloarthritis. • The MR signal within the SI joint itself reflects features of spondyloarthritis. • Intra-articular high T1 signal, fluid signal and ankylosis are seen in spondyloarthritis. • The vacuum phenomenon makes spondyloarthritis less likely.


Assuntos
Articulação Sacroilíaca/diagnóstico por imagem , Sacroileíte/diagnóstico por imagem , Espondilartrite/diagnóstico por imagem , Adolescente , Adulto , Anquilose/diagnóstico por imagem , Feminino , Humanos , Imageamento por Ressonância Magnética/métodos , Masculino , Pessoa de Meia-Idade , Estudos Retrospectivos , Sensibilidade e Especificidade , Adulto Jovem
16.
Phytopathology ; 107(12): 1468-1478, 2017 12.
Artigo em Inglês | MEDLINE | ID: mdl-28730873

RESUMO

Tolerance is defined as the ability of one cultivar to yield more than another cultivar under similar disease severity. If both cultivars suffer an equal loss in healthy (green) leaf area duration (HAD) over the grain filling period due to disease presence, then the yield loss per unit HAD loss is smaller for a more tolerant cultivar. Little is understood of what physiological and developmental traits of cultivars determine disease tolerance. In this study, we use a mathematical model of wheat to investigate the effect of a wide range of wheat phenotypes on tolerance. During the phase from stem extension to anthesis, the model calculates the assimilate source and sink potential, allowing for dynamic changes to the source-sink balance by partitioning assimilates between ear development and storage of water-soluble carbon (WSC) reserves, according to assimilate availability. To quantify tolerance, rates of epidemic progress were varied on each phenotype, leading to different levels of HAD loss during the postanthesis, grain-filling period. Model outputs show that the main determinant of tolerance is the total amount of assimilate produced per grain during the rapid grain-fill period, leading to a strong positive correlation between HAD per grain and tolerance. Reductions in traits that affect carbon assimilation rate and increases in traits that determine the amount of structural biomass in the plant increase disease tolerance through their associated reduction in number of grains per ear. Some of the most influential traits are the canopy green area index, carbon use efficiency, and leaf specific weight. Increased WSC accumulation can either increase or decrease tolerance. Furthermore, a cultivar is shown to be maximally tolerant when a crop is able to just fill its total sink size in the presence of disease. The model has identified influential functional traits and established that their associations with tolerance have a mechanistic basis.


Assuntos
Modelos Biológicos , Doenças das Plantas/imunologia , Triticum/fisiologia , Biomassa , Cruzamento , Resistência à Doença , Grão Comestível/imunologia , Grão Comestível/fisiologia , Modelos Lineares , Fenótipo , Folhas de Planta/imunologia , Folhas de Planta/fisiologia , Caules de Planta/imunologia , Caules de Planta/fisiologia , Triticum/imunologia , Água/fisiologia
17.
Phytopathology ; 107(10): 1092-1094, 2017 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-29205105

RESUMO

Epidemiology has made significant contributions to plant pathology by elucidating the general principles underlying the development of disease epidemics. This has resulted in a greatly improved theoretical and empirical understanding of the dynamics of disease epidemics in time and space, predictions of disease outbreaks or the need for disease control in real-time basis, and tactical and strategic solutions to disease problems. Availability of high-resolution experimental data at multiple temporal and spatial scales has now provided a platform to test and validate theories on the spread of diseases at a wide range of spatial scales ranging from the local to the landscape level. Relatively new approaches in plant disease epidemiology, ranging from network to information theory, coupled with the availability of large-scale datasets and the rapid development of computer technology, are leading to revolutionary thinking about epidemics that can result in considerable improvement of strategic and tactical decision making in the control and management of plant diseases. Methods that were previously restricted to topics such as population biology or evolution are now being employed in epidemiology to enable a better understanding of the forces that drive the development of plant disease epidemics in space and time. This Focus Issue of Phytopathology features research articles that address broad themes in epidemiology including social and political consequences of disease epidemics, decision theory and support, pathogen dispersal and disease spread, disease assessment and pathogen biology and disease resistance. It is important to emphasize that these articles are just a sample of the types of research projects that are relevant to epidemiology. Below, we provide a succinct summary of the articles that are published in this Focus Issue .


Assuntos
Resistência à Doença , Epidemias , Doenças das Plantas/prevenção & controle , Patologia Vegetal , Agricultura , Doenças das Plantas/estatística & dados numéricos
18.
Int J Cancer ; 139(12): 2812-2826, 2016 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-27541373

RESUMO

We evaluated the efficacy of the human papillomavirus (HPV)-16/18 AS04-adjuvanted vaccine in preventing HPV-related disease after surgery for cervical lesions in a post-hoc analysis of the PApilloma TRIal against Cancer In young Adults (PATRICIA; NCT00122681). Healthy women aged 15-25 years were randomized (1:1) to receive vaccine or control at months 0, 1 and 6 and followed for 4 years. Women were enrolled regardless of their baseline HPV DNA status, HPV-16/18 serostatus, or cytology, but excluded if they had previous or planned colposcopy. The primary and secondary endpoints of PATRICIA have been reported previously; the present post-hoc analysis evaluated efficacy in a subset of women who underwent an excisional procedure for cervical lesions after vaccination. The main outcome was the incidence of subsequent HPV-related cervical intraepithelial neoplasia grade 2 or greater (CIN2+) 60 days or more post-surgery. Other outcomes included the incidence of HPV-related CIN1+, and vulvar or vaginal intraepithelial neoplasia (VIN/VaIN) 60 days or more post-surgery. Of the total vaccinated cohort of 18,644 women (vaccine = 9,319; control = 9,325), 454 (vaccine = 190, control = 264) underwent an excisional procedure during the trial. Efficacy 60 days or more post-surgery for a first lesion, irrespective of HPV DNA results, was 88.2% (95% CI: 14.8, 99.7) against CIN2+ and 42.6% (-21.1, 74.1) against CIN1+. No VIN was reported and one woman in each group had VaIN2+ 60 days or more post-surgery. Women who undergo surgical therapy for cervical lesions after vaccination with the HPV-16/18 vaccine may continue to benefit from vaccination, with a reduced risk of developing subsequent CIN2+.


Assuntos
Adjuvantes Imunológicos , Papillomavirus Humano 16/imunologia , Papillomavirus Humano 18/imunologia , Infecções por Papillomavirus/prevenção & controle , Vacinas contra Papillomavirus/imunologia , Displasia do Colo do Útero/etiologia , Displasia do Colo do Útero/patologia , Adolescente , Adulto , Feminino , Humanos , Gradação de Tumores , Recidiva Local de Neoplasia , Avaliação de Resultados em Cuidados de Saúde , Infecções por Papillomavirus/complicações , Infecções por Papillomavirus/virologia , Ensaios Clínicos Controlados Aleatórios como Assunto , Fatores de Risco , Vacinação , Adulto Jovem , Displasia do Colo do Útero/cirurgia
19.
Ann Rheum Dis ; 75(7): 1357-62, 2016 07.
Artigo em Inglês | MEDLINE | ID: mdl-26698844

RESUMO

INTRODUCTION: Microscopic bowel inflammation is present in up to 50% of patients with spondyloarthritis (SpA) and is associated with more severe disease. Currently no reliable biomarkers exist to identify patients at risk. Calprotectin is a sensitive marker of neutrophilic inflammation, measurable in serum and stool. OBJECTIVES: To assess whether serum and faecal calprotectin in addition to C-reactive protein (CRP) can be used to identify patients with SpA at risk of microscopic bowel inflammation. METHODS: Serum calprotectin and CRP were measured in 125 patients with SpA. In 44 of these patients, faecal samples were available for calprotectin measurement. All 125 patients underwent an ileocolonoscopy to assess the presence of microscopic bowel inflammation. RESULTS: Microscopic bowel inflammation was present in 53 (42.4%) patients with SpA. Elevated serum calprotectin and CRP were independently associated with microscopic bowel inflammation. Faecal calprotectin was also significantly higher in patients with microscopic bowel inflammation. Patients with CRP and serum calprotectin elevated had a frequency of bowel inflammation of 64% vs 25% in patients with low levels of both. When either CRP or serum calprotectin was elevated, the risk was intermediate (40%) and measuring faecal calprotectin provided further differentiation. Hence we suggest a screening approach where initially serum calprotectin and CRP are assessed and, if necessary, faecal calprotectin. The model using this scenario provided an area under the ROC curve of 74.4% for detection of bowel inflammation. CONCLUSIONS: Calprotectin measurements in stool and serum, in addition to CRP, may provide a promising strategy to identify patients with SpA at risk of bowel inflammation and could play a role in overall patient stratification.


Assuntos
Colite/etiologia , Complexo Antígeno L1 Leucocitário/análise , Espondilartrite/metabolismo , Adulto , Biomarcadores/análise , Proteína C-Reativa/análise , Estudos de Casos e Controles , Colite/metabolismo , Colite/patologia , Colonoscopia , Fezes/química , Feminino , Seguimentos , Humanos , Intestinos/patologia , Complexo Antígeno L1 Leucocitário/sangue , Masculino , Estudos Prospectivos , Curva ROC , Espondilartrite/complicações , Espondilartrite/patologia
20.
Ann Rheum Dis ; 75(3): 499-510, 2016 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-26644232

RESUMO

BACKGROUND: Since the publication of the European League Against Rheumatism recommendations for the pharmacological treatment of psoriatic arthritis (PsA) in 2012, new evidence and new therapeutic agents have emerged. The objective was to update these recommendations. METHODS: A systematic literature review was performed regarding pharmacological treatment in PsA. Subsequently, recommendations were formulated based on the evidence and the expert opinion of the 34 Task Force members. Levels of evidence and strengths of recommendations were allocated. RESULTS: The updated recommendations comprise 5 overarching principles and 10 recommendations, covering pharmacological therapies for PsA from non-steroidal anti-inflammatory drugs (NSAIDs), to conventional synthetic (csDMARD) and biological (bDMARD) disease-modifying antirheumatic drugs, whatever their mode of action, taking articular and extra-articular manifestations of PsA into account, but focusing on musculoskeletal involvement. The overarching principles address the need for shared decision-making and treatment objectives. The recommendations address csDMARDs as an initial therapy after failure of NSAIDs and local therapy for active disease, followed, if necessary, by a bDMARD or a targeted synthetic DMARD (tsDMARD). The first bDMARD would usually be a tumour necrosis factor (TNF) inhibitor. bDMARDs targeting interleukin (IL)12/23 (ustekinumab) or IL-17 pathways (secukinumab) may be used in patients for whom TNF inhibitors are inappropriate and a tsDMARD such as a phosphodiesterase 4-inhibitor (apremilast) if bDMARDs are inappropriate. If the first bDMARD strategy fails, any other bDMARD or tsDMARD may be used. CONCLUSIONS: These recommendations provide stakeholders with an updated consensus on the pharmacological treatment of PsA and strategies to reach optimal outcomes in PsA, based on a combination of evidence and expert opinion.


Assuntos
Algoritmos , Antirreumáticos/uso terapêutico , Artrite Psoriásica/tratamento farmacológico , Glucocorticoides/uso terapêutico , Anti-Inflamatórios não Esteroides/uso terapêutico , Gerenciamento Clínico , Europa (Continente) , Humanos , Reumatologia , Sociedades Médicas
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA