La función de las proteínas de choque térmico en las infecciones virales / The Role of Heat Shock Proteins in Viral Infections

Resumen Las proteínas de choque térmico se describieron como una respuesta intracelular al estrés calórico; sin embargo, al paso del tiempo, se observó que estas proteínas tienen múltiples funciones y que participan de manera relevante tanto en los procesos fisiológicos como patológicos. Las actividades que realizan las proteínas de choque térmico se relacionan con su localización, que puede ser intra o extracelular, al momento fisiológico y a las diferentes asociaciones estructurales, que pueden ser desde péptidos derivados de estas, hasta dímeros o multímeros. Con base en estas características funcionales, se les ha denominado proteínas multiempleo o "moonlighting proteins". En este artículo se describen algunas de las actividades de estas proteínas con relación al sistema inmunológico y las infecciones virales, en particular con los procesos inflamatorios.

Abstract Heat shock proteins (HSP) were first described as a cell response to heat stress. However, over time, it has become clear they have multiple functions inside and outside cells, and that they actively participate in different physiological and pathological processes. They perform functions related to their cellular location or physiological moment, which is why they have been called multi-use proteins or "moonlighting proteins". Furthermore, HSP activity is associated with different structural conformations, from peptides derived from them or as dimers or multimers, to mention a few. This article describes these functions and their relationship with the immune system, and their relationship with viral infection, particularly with inflammatory processes.

Desempeño de biomarcadores de las imágenes con tensor de difusión en regiones tumorales del glioblastoma. Análisis exploratorio de datos mediante gráficos de zombie y pruebas de diagnóstico / Diffusion tensor imaging-derived biomarkers performance in glioblastoma tumor regions: exploratory data analysis using zombie plots and diagnostic tests

Resumen Introducción: Han sido reportados 11 biomarcadores de imágenes con tensor de difusión (DTI) en las regiones tumorales del glioblastoma. Objetivo: Comparar la eficacia de biomarcadores de glioblastoma mediante gráficos de zombie, que permiten la comparación simultánea en función de razones de verosimilitud. Métodos: Cohorte retrospectiva de 29 sujetos con glioblastoma a quienes se efectuó resonancia magnética cerebral de 3 T. Los eigenvalores mayor, intermedio y menor de ITD se utilizaron para calcular 11 biomarcadores en cinco regiones tumorales: sustancia blanca de apariencia normal (NAWM), edema proximal y distal, tumoral viable y necrosis. Las tablas de contingencia con resultados verdaderos y falsos positivos y negativos permitieron calcular gráficos de zombie basados en el factor de Bayes y pruebas diagnósticas previamente no reportadas. Resultados: Los biomarcadores DM, AF, q, L, Cl, Cp, AR actúan en la zona óptima para el diagnóstico de NAWM. Las regiones de edema proximal y distal, tejido tumoral que se realza con contraste y necrosis no poseen biomarcadores que las identifiquen en un nivel de rendimiento óptimo. Conclusiones: Los biomarcadores DM, AF, q, L, Cl, Cp, AR discriminan el tejido cerebral normal en la zona óptima, pero el rendimiento de otras regiones tumorales se ubica en las zonas de inclusión diagnóstica, exclusión diagnóstica y mediocre.

Abstract Introduction: Using diffusion tensor imaging (DTI), 11 biomarkers have been reported in different glioblastoma regions. Objective: To compare the efficacy of glioblastoma biomarkers using "zombie plots". Methods: Retrospective cohort of 29 subjects with glioblastoma who underwent 3-Tesla brain magnetic resonance imaging. DTI major, intermediate and minor eigenvalues were used to calculate biomarkers at five tumor regions: normal-appearing white matter (NAWM), proximal and distal edema, tumor tissue and necrosis. Contingency tables with true and false positive and negative results allowed the calculation of zombie plots based on the Bayes factor and previously unreported diagnostic tests. Results: The MD, FA, q, L, Cl, Cp and RA biomarkers had a good performance at the optimal zone for NAWM diagnosis. The proximal and distal edema, enhancing rim and necrosis regions do not have biomarkers that identify them with an optimal performance level. Conclusions: Zombie plots allow simultaneous comparison of biomarkers based on likelihood ratios. MD, FA, q, L, Cl, Cp, RA discriminated NAWM normal brain tissue at the optimal zone, but performance for other regions was at the mediocre, diagnostic inclusion and diagnostic exclusion zones.

Physical fitness and nutritional status in female adolescents with anorexia nervosa / Aptidão física e estado nutricional em adolescentes do sexo feminino com anorexia nervosa

ABSTRACT Objective This study aimed to determine whether physical fitness is related to nutritional status in a sample of female adolescents with anorexia nervosa, to contrast the nourished and undernourished patients, and to compare the physical fitness in these patients with normative data of healthy subjects stratified by age and gender. Methods Nutritional status was determined using the body mass index Z-score, fat mass, fat-free mass (bioelectrical impedance analysis), and the Controlling Nutritional Status score in 15 anorexic adolescents with 14.3±1.6 years. Physical fitness was assessed using the ALPHA-Fitness Battery (handgrip strength, standing broad jump, 4x10m shuttle run, and 20m shuttle run tests). Results Handgrip strength was significantly associated with all variables of nutritional status, except with the three blood components of the Controlling Nutritional Status score. The undernourished anorexic patients showed significantly worse physical fitness than the nourished anorexic patients in all tests, except in the standing broad jump and the 4x10m shuttle run tests. The physical fitness tests of the female anorexic adolescents showed scores significantly worse than those of the normative European female adolescent population. Conclusion The observation of female adolescents with anorexia nervosa showed associations between higher physical fitness levels and better nutritional statuses. Handgrip strength and 20m shuttle run tests may be options of additional indicators of undernutrition in anorexic female adolescents. The undernourished anorexic patients showed worse physical fitness than the nourished ones. According to normative data for healthy sex- and agematched adolescents, physical fitness is severely impaired in anorexic female adolescents.

RESUMO Objetivo Este estudo teve como objetivo determinar se a aptidão física está relacionada ao estado nutricional em uma amostra de adolescentes do sexo feminino com anorexia nervosa, contrastar pacientes nutridas versus desnutridas e comparar a aptidão física nesses pacientes com dados normativos de indivíduos saudáveis estratificados por idade e gênero. Métodos O estado nutricional foi determinado pelo escore Z do índice de massa corporal, massa gorda e massa livre de gordura (análise de impedância bioelétrica) e pelo escore do Estado Nutricional Controlador em 15 adolescentes anoréxicas com 14,3±1,6 anos. A aptidão física foi avaliada usando a Bateria ALPHA-Fitness (força de preensão manual, salto em distância em pé, corrida com vaivém 4x10m e corrida com vaivém de 20m). Resultados A força de preensão manual foi significativamente associada a todas as variáveis do estado nutricional, exceto aos três componentes sanguíneos do escore do Estado de Controle Nutricional. As pacientes anoréxicas desnutridas mostraram uma aptidão física substancialmente pior do que as pacientes anoréxicas nutridas em todos os testes, exceto nos saltos em pé em posição ampla e nos testes de corrida em 4x10m. Os testes de aptidão física dos adolescentes anoréxicos do sexo feminino apresentaram escores consideravelmente piores do que os da população adolescente europeia normativa. Conclusão Adolescentes do sexo feminino com anorexia nervosa apresentaram associação entre maiores níveis de aptidão física e melhor estado nutricional. Os testes de força de preensão manual e corrida de lançadeira de 20m podem ser alternativas como indicadores adicionais do estado de desnutrição em adolescentes anoréxicas. As pacientes anoréxicas desnutridas demonstraram pior condicionamento físico do que as pacientes anoréxicas nutridas. Segundo dados normativos para adolescentes saudáveis de acordo com o sexo e a idade, a aptidão física é gravemente prejudicada em adolescentes anoréxicas do sexo feminino.

Frequency and associated factors of amnestic mild cognitive impairment at four senior citizen clubs in Lima, Peru / Frequência e fatores associados do comprometimento cognitivo leve amnésico em quatro clubes de idosos em lima, peru

ABSTRACT Amnestic mild cognitive impairment (aMCI) is a subtle alteration in cognitive function that does not affect day-to-day activities and can precede Alzheimer's dementia. An increase in the prevalence of both these conditions is expected given the growing elderly population and recognizing risk factors can help reduce the burden. Objective: the aim of this study was to determine the frequency and associated factors of aMCI in senior citizen clubs (SCC) at four districts with different socioeconomic status in Lima, Peru. Methods: we applied Petersen's criteria to determine the presence of the condition in an interview which included the use of the Memory Alteration Test (M@T) and the Pfeffer Functional Activity Questionnaire (PFAQ). Results: sixty-three out of 352 (17.9%) participants had aMCI. Factors associated with this condition were older age, fewer years of education at marriage whereas being from the SCC La Molina (district with highest socioeconomic status and resources for activities for the elderly) were associated with not having aMCI. There was no difference for sex, body mass index or history of hypertension. Conclusion: this predementia stage is frequent and usually undetected in urban Lima. Tools such as the M@T could help general practitioners detect this condition before its progression to dementia.

RESUMO O comprometimento cognitivo leve amnésico (aMCI) é uma alteração sutil na função cognitiva que não altera as atividades do dia-a-dia e pode preceder a demência de Alzheimer. Um aumento na prevalência de ambas as condições é esperado devido ao crescimento da população idosa e o reconhecimento de fatores de risco pode ajudar a reduzir a carga de doença. Objetivo: o objetivo deste estudo foi o de determinar a freqüência e fatores associados a MCI em clubes de cidadãos idosos (CCI) em quatro distritos com diferentes condições socioeconômicas em Lima, Peru. Métodos: aplicamos os critérios de Petersen para determinar a presença da condição em uma entrevista que incluiu o uso do Teste de Alteração de Memória (M@T) e do Questionário de Atividades Funcionais de Pfeffer (QAFP). Resultados: sessenta e três dos 352 (17,9%) participantes tinham MCI. Os fatores associados a essa condição foram idade avançada, menor tempo de estudo ao se casar enquanto ser provenientes do CCI La Molina (distrito com maior nível socioeconômico e recursos para atividades para idosos) foram associados a não possuir um MCI. Não houve diferença por sexo, índice de massa corporal e história de hipertensão. Conclusão: este estágio de pré-demência é frequente e geralmente não detectado na cidade de Lima. Ferramentas como o M@T poderiam ajudar os clínicos gerais a detectar essa condição antes da progressão para a demência.

Porencefalia, reporte de caso / Porencephaly, report of a case

La porencefalia como lesión cerebral es una entidad que por el gran compromiso encefálico genera déficits motores y conductuales afectando el normal desarrollo de niños, siendo este el grupo poblacional principalmente afectado; quienes desde muy temprana edad presentan manifestaciones clínicas, sin embargo en algunos casos excepcionales tienden a cursan asintomáticos o con mínimas secuelas motoras que pueden retrasar su diagnóstico; campo en que las técnicas de imagen llegan a ser fundamentales. Se presenta aquí el primer caso de porencefalia reportado en Boyacá a la edad adulta sin antecedentes que sugieran su diagnóstico o algún manejo instaurado a la misma, la cual termina complicándose dejando varias secuelas..(AU)

Porencephaly as a brain injury is an entity that due to the great encephalic engagement generates motor deficits and behavioral affections on the normal development of children, being this the population group mainly affected, who from a very early age present clinical manifestations, however some exceptional cases are asymptomatic or has minimal motor sequelae that may delay their diagnosis; a sphere in which imaging techniques become fundamental. Here we present the first case of porencephaly reported in Boyacá to adulthood without a history suggesting its diagnosis or some management established to it, which ends up complicating leaving several sequelae..(AU)

El impacto de la educación alimentaria nutricional en el embarazo: una revisión de las experiencias de intervención / Impact of food and nutrition education during pregnancy: a review of nutritional interventions

Pregnancy is a period of great nutritional vulnerability in a women's life, thus food and nutrition education (FNE) is a valuable tool for achieving healthy eating. The purpose of this study was to review the impact of nutritional interventions designed for healthy pregnant women. An analysis of the geographical distribution of 42 publications and the educational strategies employed was conducted. Effectiveness to generate changes in knowledge, eating attitudes and practices, promote an adequate weightgain and to prevent anemia was analyzed. Research from Asia and those including a combination of multiple educational strategies such as written information, information and communication technologies, workshops or discussion groups were the most prevalent. Interventions show favorable results when they intend to achieve an increase in the level of knowledge, stimulate changes in dietary patterns and prevent iron-deficiency anemia by adherence to iron supplementation. Gestational weight gain was also favorably affected when FNE is employed, however, the prevention of excessive weight gain depended on nutritional status prior to pregnancy and on other genetic and environmental determinants. Successful experiences encourage the inclusion of FNE as a routine tool in prenatal care; personalized nutritional counselling and the use of ICT are alternatives of choice in the current health scenario.

El embarazo es un momento de vulnerabilidad nutricional, por lo que la Educación Alimentaria Nutricional (EAN) resulta una herramienta valiosa para alcanzar una alimentación saludable. El objetivo de este trabajo es realizar una revisión de los impactos que tuvieron experiencias de EAN en mujeres embarazadas adultas sanas en distintos ámbitos geográficos. Se incluyeron 42 investigaciones publicadas entre los años 2000 y 2015. Se describió la procedencia de las publicaciones y las estrategias educativas empleadas. Se analizaron los efectos en los conocimientos, actitudes y prácticas alimentarias, en el patrón de ganancia de peso y en estimular la adherencia a la suplementación con hierro. Predominaron las investigaciones de Asia y las que incluyeron una combinación de múltiples estrategias educativas. Las intervenciones revelan resultados favorables cuando se proponen mejorar el nivel de conocimientos, estimular cambios en los patrones dietéticos y prevenir la anemia ferropénica mediante suplementación. La ganancia de peso se afectó favorablemente, no obstante el prevenir ganancias excesivas depende del estado nutricional pre-gestacional y de otros condicionantes genéticos y ambientales. Las experiencias exitosas estimulan la inclusión de EAN rutinaria en el control prenatal, siendo la consejería nutricional personalizada y el uso de Tics las alternativas de elección.

Alemtuzumab in refractory Sézary syndrome

Abstract: Sézary syndrome is a primary cutaneous T-cell lymphoma characterized by the triad of erythroderma, lymphadenopathy and circulating atypical cells. The emergence of new molecular targets has enabled the development of drugs such as alemtuzumab, an anti-CD52 monoclonal antibody, which has shown promising results in the treatment of this entity. We report the case of a 70-year-old male with refractory Sézary syndrome in whom treatment with alemtuzumab achieved an 80% skin lesion clearance with complete haematologic and radiologic response. The treatment was discontinued after 4 months due to adverse effects, with the patient showing a sustained response without disease progression after 13 months of follow-up.