Search results for "Microbiota."
showing 10 items of 496 documents
From Dysbiosis to Neurodegenerative Diseases through Different Communication Pathways: An Overview
2023
The microbiome research field has rapidly evolved over the last few decades, becoming a major topic of scientific and public interest. The gut microbiota (GM) is the microbial population living in the gut. The GM has many functions, such as maintaining gut homeostasis and host health, providing defense against enteric pathogens, and involvement in immune system development. Several studies have shown that GM is implicated in dysbiosis and is presumed to contribute to neurodegeneration. This review focuses mainly on describing the connection between the intestinal microbiome alterations (dysbiosis) and the onset of neurodegenerative diseases to explore the mechanisms that link the GM to nerv…
The Synbiotic Combination of Akkermansia muciniphila and Quercetin Ameliorates Early Obesity and NAFLD through Gut Microbiota Reshaping and Bile Acid…
2021
Gut microbiota plays a key role in obesity and non-alcoholic fatty liver disease (NAFLD), so synbiotics could be a therapeutic alternative. We aim to evaluate a nutritional intervention together with the administration of the bacteria Akkermansia muciniphila and the antioxidant quercetin in an in vivo model of early obesity and NAFLD. 21-day-old rats were fed with control or high-fat diet for six weeks. Then, all animals received control diet supplemented with/without quercetin and/or A. muciniphila for three weeks. Gut microbiota, NAFLD-related parameters, circulating bile acids (BAs) and liver gene expression were analyzed. The colonization with A. muciniphila was associated with less bod…
The Role of Human Microbiota in Myasthenia Gravis: A Narrative Review
2023
Myasthenia gravis (MG) is an autoimmune neuromuscular disease characterized by fluctuating weakness of the skeletal muscles. Although antibodies against the neuromuscular junction components are recognized, the MG pathogenesis remains unclear, even if with a well-known multifactorial character. However, the perturbations of human microbiota have been recently suggested to contribute to MG pathogenesis and clinical course. Accordingly, some products derived from commensal flora have been demonstrated to have anti-inflammatory effects, while other have been shown to possess pro-inflammatory properties. In addition, patients with MG when compared with age-matched controls showed a distinctive …
HUMAN MILK IS NOT “MERELY NUTRITIOUS”: HOW ITS BIOACTIVE ROLE CAN INFLUENCE CHILD HEALTH
2021
Maternal milk represents the best food for the newborn, providing specific physiologic advantages over the other sources of nutrition. It also contains many hundreds to thousands of bioactive molecules that protect against infection (i.e. IgA), inflammation (i.e. 5-methylthioadenosine) and contribute to eliciting strong immune responses in breastfed children (i.e. allergens or viral antigens). Quality and quantity of breast milk components may influence the development of infant body composition in the first years of life; in particular, it has been shown that a different composition of human oligosaccharides (HMOs) in overweight/obese women’s human milk can be correlated with her offspring…
Parámetros clínicos y características microbiológicas en pacientes con tejidos periimplantarios sanos, mucositis y peri-implantitis
2014
La restauración de los dientes ausentes mediante implantes dentales constituye hoy en día un tratamiento rutinario y muy extendido. Varios estudios longitudinales han demostrado altas tasas de supervivencia de los implantes en función, que van desde el 90 % al 95 % en un periodo de hasta 20 años de seguimiento. Las complicaciones biológicas alrededor de los implantes dentales se clasifican en tempranas y tardías. Los fracasos tempranos son los que tienen lugar en el tiempo hasta la conexión del pilar al implante y son más fáciles de diagnosticar debido a la falta de osteointegración. Los fracasos tardíos son el resultado de la incapacidad de mantener la oseointegración, siendo la complicaci…
Intestinal microbiota mutualism and gastrointestinal diseases
2015
The purpose of this work is to investigate the link between an altered intestinal mcro-biota or dysbiosis and chronic inflammatory disorders, in particular inflammatory bowel disease (IBD). Along with probiotics, faecal microbiota transplantation (FMT) opts to be a promising therapeutic treatment for restoring the bacterial homeostasis of the hu-man intestine and reducing the risk of colorectal carcinogenesis. Microbiota is the com-plex microbial flora that resides in the gut establishing a mutually beneficial relation-ship. Alteration of the microbiota’s composition, termed as dysbiosis, may lead to pathological conditions. Treatment with probiotics can restore the normal commensal flora i…
The Administration of Escherichia coli Nissle 1917 Ameliorates Development of DSS-Induced Colitis in Mice
2018
The beneficial effects of probiotics on immune-based pathologies such as inflammatory bowel disease (IBD) have been well reported. However, their exact mechanisms have not been fully elucidated. Few studies have focused on the impact of probiotics on the composition of the colonic microbiota. The aim of the present study was to correlate the intestinal anti-inflammatory activity of the probiotic Escherichia coli Nissle 1917 (EcN) in the dextran sodium sulfate (DSS) model of mouse colitis with the changes induced in colonic microbiota populations. EcN prevented the DSSinduced colonic damage, as evidenced by lower disease activity index (DAI) values and colonic weight/length ratio, when compa…
Combined Analysis of the Effects of Exposure to Blue Light in Ducks Reveals a Reduction in Cholesterol Accumulation Through Changes in Methionine Met…
2021
Monochromatic light is widely used in industry, medical treatment, and animal husbandry. Green-blue light has been found to stimulate the proliferation of satellite cells and the results of studies on the effects of blue light on poultry vary widely. It would be worthwhile to study the effect of blue light on poultry growth and how exposure to blue light affects metabolism and the intestinal microbiota. In this study, we irradiated Cherry Valley ducks with 460 nm wavelength light (blue light) for 3 weeks to explore the effects of blue light in comparison to those of white light (combined wavelength light) on animal growth and development. Our results showed that, under exposure to blue ligh…
Variability of the human gut microbiota in space, time, and associated with the irritable bowel syndrome
2013
Esta tesis doctoral se centra en el estudio de una de las comunidades microbianas más complejas y de mayor interés biomédico: la microbiota asociada al intestino distal de humanos. El objetivo principal ha sido estudiar las alteraciones potenciales de la microbiota intestinal en relación con el síndrome del intestino irritable (SII), el desorden funcional del tracto gastrointestinal más común en sociedades occidentales. Nuestra aproximación forma parte de una visión actual sobre las relaciones entre microorganismos y hospedadores que trasciende la clásica y estrecha mirada sobre patógenos concretos y enfermedades infecciosas y la desplaza hacia una concepción más de conjunto, que valora los…
Interpretation of gut microbiota data in the ‘eye of the beholder’: A commentary and re‐evaluation of data from ‘Impacts of radiation exposure on the…
2021
1.Evidence that exposure to environmental pollutants can alter the gut microbiota composition of wildlife includes studies of rodents exposed to radionuclides. 2.Antwis et al. (2021) used amplicon sequencing to characterise the gut microbiota of four species of rodent (Myodes glareolus, Apodemus agrarius, A. flavicollis and A. sylvaticus) inhabiting the Chernobyl Exclusion Zone (CEZ) to examine possible changes in gut bacteria (microbiota) and gut fungi (mycobiota) associated with exposure to radionuclides and whether the sample type (from caecum or faeces) affected the analysis. 3.The conclusions derived from the analyses of gut mycobiota are based on data that represent a mixture of inges…