ABSTRACT
Olfactory dysfunction is observed in several neurological disorders including Mild Cognitive Impairment (MCI) and Alzheimer disease (AD). These deficits occur early and correlate with global cognitive performance, depression and degeneration of olfactory regions in the brain. Despite extensive human studies, there has been little characterization of the olfactory system in models of AD. In order to determine if olfactory structural and/or molecular phenotypes are observed in a model expressing a genetic risk factor for AD, we assessed the olfactory bulb (OB) in APOE4 transgenic mice. A significant decrease in OB weight was observed at 12 months of age in APOE4 mice concurrent with inflammation and decreased NeuN expression. In order to determine if a diet rich in omega-3s may alleviate the olfactory system phenotypes observed, we assessed WT and APOE4 mice on a docosahexaenoic acid (DHA) diet. APOE4 mice on a DHA diet did not present with atrophy of the OB, and the alterations in NeuN and IBA-1 expression were alleviated. Furthermore, alterations in caspase mRNA and protein expression in the APOE4 OB were not observed with a DHA diet. Similar to the human AD condition, OB atrophy is an early phenotype in the APOE4 mice and concurrent with inflammation. These data support a link between the structural olfactory brain region atrophy and the olfactory dysfunction observed in AD and suggest that inflammation and cell death pathways may contribute to the olfactory deficits observed. Furthermore, the results suggest that diets enriched in DHA may provide benefit to APOE4 allele carriers.
Subject(s)
Alzheimer Disease , Apolipoprotein E4 , Docosahexaenoic Acids/physiology , Olfaction Disorders/diet therapy , Olfactory Bulb , Alzheimer Disease/complications , Alzheimer Disease/genetics , Animals , Apolipoprotein E4/genetics , Atrophy , Diet , Disease Models, Animal , Mice , Mice, Transgenic , Olfaction Disorders/etiology , Olfaction Disorders/genetics , Olfactory Bulb/growth & development , Olfactory Bulb/metabolism , Olfactory Bulb/pathologyABSTRACT
COVID-19 rapidly turned to a global pandemic posing lethal threats to overwhelming health care capabilities, despite its relatively low mortality rate. The clinical respiratory symptoms include dry cough, fever, anosmia, breathing difficulties, and subsequent respiratory failure. No known cure is available for COVID-19. Apart from the anti-viral strategy, the supports of immune effectors and modulation of immunosuppressive mechanisms is the rationale immunomodulation approach in COVID-19 management. Diet and nutrition are essential for healthy immunity. However, a group of micronutrients plays a dominant role in immunomodulation. The deficiency of most nutrients increases the individual susceptibility to virus infection with a tendency for severe clinical presentation. Despite a shred of evidence, the supplementation of a single nutrient is not promising in the general population. Individuals at high-risk for specific nutrient deficiencies likely benefit from supplementation. The individual dietary and nutritional status assessments are critical for determining the comprehensive actions in COVID-19.
Subject(s)
Betacoronavirus/pathogenicity , Coronavirus Infections/diet therapy , Cough/diet therapy , Immunologic Factors/therapeutic use , Micronutrients/therapeutic use , Pandemics , Pneumonia, Viral/diet therapy , Betacoronavirus/drug effects , Betacoronavirus/immunology , COVID-19 , Coronavirus Infections/diagnosis , Coronavirus Infections/immunology , Coronavirus Infections/pathology , Cough/diagnosis , Cough/immunology , Cough/pathology , Disease Management , Fever/diagnosis , Fever/diet therapy , Fever/immunology , Fever/pathology , Humans , Immunity, Cellular/drug effects , Immunity, Innate/drug effects , Olfaction Disorders/diagnosis , Olfaction Disorders/diet therapy , Olfaction Disorders/immunology , Olfaction Disorders/pathology , Pneumonia, Viral/diagnosis , Pneumonia, Viral/immunology , Pneumonia, Viral/pathology , Respiratory Insufficiency/diagnosis , Respiratory Insufficiency/diet therapy , Respiratory Insufficiency/immunology , Respiratory Insufficiency/pathology , SARS-CoV-2 , Severity of Illness Index , Trace Elements/therapeutic use , Vitamins/therapeutic useABSTRACT
Orientações em alimentação e nutrição para adultos e idosos com COVID-19 em isolamento domiciliar e após alta hospitalar, com suspeita ou diagnóstico do novo Coronavírus, também às pessoas que apresentam sintomas leves ou moderados e que não precisam ficar internadas em hospitais, direcionada também para os cuidadores e pessoas que convivem no mesmo ambiente e demais interessados no tema. Em uma linguagem acessível e usando ótimas ilustrações e tabelas, esclarece sobre os cuidados nutricionais e também sobre alguns alimentos e nutrientes importantes para a imunidade. Instrui como fazer em situações de falta de apetite, perda de paladar (Disgeusia), dificuldade para engolir (Disfagia), perda de olfato (Anosmia) e diarréia. Orienta sobre as compras dos alimentos, sobre os riscos de contaminação, tempo de validade e armazenagem na geladeira e freezer, bem como os cuidados no preparo dos mesmos. Apresenta instruções sobre a higienização das mãos com água e sabonete e como fazer a fricção anti-séptica das mãos com preparação alcoólicas, sobre o manuseio adequado na retirada do lixo e instruções para diluição da solução clorada para superfícies e para embalagens e alimentos. Por fim, apresenta sete passos para manter a alimentação saudável para adultos e idosos
Guidelines on food and nutrition for adults and the elderly with COVID-19 in home isolation and after hospital discharge, with suspicion or diagnosis of the new coronavirus, also those with mild or moderate symptoms and who do not need to be hospitalized, also directed to the caregivers and people who live in the same environment and others interested in the topic. In an accessible language and using great illustrations and tables, it clarifies about nutritional care and also about some foods and nutrients important for immunity. Instructs you how to do it in situations of poor appetite, loss of taste (dysgeusia), difficulty swallowing (dysphagia), loss of smell (anosmia) and diarrhea. It advises on food purchases, on the risks of contamination, expiration time and storage in the refrigerator and freezer, as well as care in preparing them. It presents instructions on hand hygiene with soap and water and how to rub hands with alcoholic preparations, on proper handling of waste removal and instructions for diluting the chlorinated solution to surfaces and to packaging and food. Finally, it presents seven steps to maintain healthy eating for adults and the elderly
