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https://www.readbyqxmd.com/read/28220542/the-gut-microbiome-in-human-neurological-disease-a-review
#1
REVIEW
Helen Tremlett, Kylynda C Bauer, Silke Appel-Cresswell, Brett B Finlay, Emmanuelle Waubant
Almost half the cells and 1% of the unique genes found in our bodies are human, the rest are from microbes; predominantly bacteria, archaea, fungi, and viruses. These microorganisms collectively form the human microbiota, with most colonizing the gut. Recent technological advances, open access data-libraries, and application of high throughput sequencing have allowed these microbes to be identified and their contribution to neurological health examined. Emerging evidence links perturbations in the gut microbiota to neurological disease, including disease risk, activity, and progression...
February 21, 2017: Annals of Neurology
https://www.readbyqxmd.com/read/28215162/gut-brain-axis-role-of-lipids-in-the-regulation-of-inflammation-pain-and-cns-diseases
#2
Roberto Russo, Claudia Cristiano, Carmen Avagliano, Carmen De Caro, Giovanna La Rana, Giuseppina Mattace Raso, Roberto Berni Canani, Rosaria Meli, Antonio Calignano
The human gut is a composite anaerobic environment with a large, diverse and dynamic enteric microbiota, represented by more than 100 trillion microorganisms, including at least 1000 distinct species. The discovery that a different microbial composition can influence behavior and cognition, and in turn the nervous system can indirectly influence enteric microbiota composition, has significantly contributed to establish the well-accepted concept of gut-brain axis. This hypothesis is supported by several evidence showing mutual mechanisms, which involve the vague nerve, the immune system, the hypothalamic-pituitary-adrenal (HPA) axis modulation and the bacteria-derived metabolites...
February 16, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28202372/gut-microbiota-implications-in-parkinson-s-disease
#3
REVIEW
Arun Parashar, Malairaman Udayabanu
Gut microbiota (GM) can influence various neurological outcomes, like cognition, learning, and memory. Commensal GM modulates brain development and behavior and has been implicated in several neurological disorders like Alzheimer's disease, multiple sclerosis, amyotrophic lateral sclerosis, anxiety, stress and much more. A recent study has shown that Parkinson's disease patients suffer from GM dysbiosis, but whether it is a cause or an effect is yet to be understood. In this review, we try to connect the dots between GM and PD pathology using direct and indirect evidence...
February 7, 2017: Parkinsonism & related Disorders
https://www.readbyqxmd.com/read/28176819/reduction-of-abeta-amyloid-pathology-in-appps1-transgenic-mice-in-the-absence-of-gut-microbiota
#4
T Harach, N Marungruang, N Duthilleul, V Cheatham, K D Mc Coy, G Frisoni, J J Neher, F Fåk, M Jucker, T Lasser, T Bolmont
Alzheimer's disease is the most common form of dementia in the western world, however there is no cure available for this devastating neurodegenerative disorder. Despite clinical and experimental evidence implicating the intestinal microbiota in a number of brain disorders, its impact on Alzheimer's disease is not known. To this end we sequenced bacterial 16S rRNA from fecal samples of Aβ precursor protein (APP) transgenic mouse model and found a remarkable shift in the gut microbiota as compared to non-transgenic wild-type mice...
February 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28092661/interactions-between-the-microbiota-immune-and-nervous-systems-in-health-and-disease
#5
REVIEW
Thomas C Fung, Christine A Olson, Elaine Y Hsiao
The diverse collection of microorganisms that inhabit the gastrointestinal tract, collectively called the gut microbiota, profoundly influences many aspects of host physiology, including nutrient metabolism, resistance to infection and immune system development. Studies investigating the gut-brain axis demonstrate a critical role for the gut microbiota in orchestrating brain development and behavior, and the immune system is emerging as an important regulator of these interactions. Intestinal microbes modulate the maturation and function of tissue-resident immune cells in the CNS...
February 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/28035935/altered-gut-microbiome-composition-and-tryptic-activity-of-the-5xfad-alzheimer-s-mouse-model
#6
Carolin Brandscheid, Florian Schuck, Sven Reinhardt, Karl-Herbert Schäfer, Claus U Pietrzik, Marcus Grimm, Tobias Hartmann, Andreas Schwiertz, Kristina Endres
The regulation of physiological gut functions such as peristalsis or secretion of digestive enzymes by the central nervous system via the Nervus vagus is well known. Recent investigations highlight that pathological conditions of neurological or psychiatric disorders might directly interfere with the autonomous neuronal network of the gut - the enteric nervous system, or even derive from there. By using a murine Alzheimer's disease model, we investigated a potential influence of disease-associated changes on gastrointestinal properties...
December 30, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27911317/alzheimer-s-disease-histological-and%C3%A2-behavioral-manifestations-in%C3%A2-transgenic-mice-correlate-with%C3%A2-specific%C3%A2-gut-microbiome-state
#7
Liang Shen, Lu Liu, Hong-Fang Ji
Alzheimer's disease (AD) is a neurodegenerative brain disease and is the most common form of dementia. In recent years, many studies indicated the association of gut microbiota changes with metabolic diseases. However, the gut microbiota of AD has not been investigated. The present study aims to compare the gut microbiota in APP/PS1 transgenic mice of AD and C57/Bl6 wild-type (WT) mice by pyrosequencing the V3 and V4 regions of the bacterial 16S ribosomal RNA genes. The 3-, 6-, and 8-month-old APP/PS1 and WT mice were used to explore the effects of age on the gut microbiota...
November 28, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/27866330/human-gut-microbiota-the-links-with-dementia-development
#8
REVIEW
Rashad Alkasir, Jing Li, Xudong Li, Miao Jin, Baoli Zhu
Dementia is a comprehensive category of brain diseases that is great enough to affect a person's daily functioning. The most common type of dementia is Alzheimer's disease, which makes most of cases. New researches indicate that gastrointestinal tract microbiota are directly linked to dementia pathogenesis through triggering metabolic diseases and low-grade inflammation progress. A novel strategy is proposed for the management of these disorders and as an adjuvant for psychiatric treatment of dementia and other related diseases through modulation of the microbiota (e...
February 2017: Protein & Cell
https://www.readbyqxmd.com/read/27776263/association-of-brain-amyloidosis-with-pro-inflammatory-gut-bacterial-taxa-and-peripheral-inflammation-markers-in-cognitively-impaired-elderly
#9
Annamaria Cattaneo, Nadia Cattane, Samantha Galluzzi, Stefania Provasi, Nicola Lopizzo, Cristina Festari, Clarissa Ferrari, Ugo Paolo Guerra, Barbara Paghera, Cristina Muscio, Angelo Bianchetti, Giorgio Dalla Volta, Marinella Turla, Maria Sofia Cotelli, Michele Gennuso, Alessandro Prelle, Orazio Zanetti, Giulia Lussignoli, Dario Mirabile, Daniele Bellandi, Simona Gentile, Gloria Belotti, Daniele Villani, Taoufiq Harach, Tristan Bolmont, Alessandro Padovani, Marina Boccardi, Giovanni B Frisoni
The pathway leading from amyloid-β deposition to cognitive impairment is believed to be a cornerstone of the pathogenesis of Alzheimer's disease (AD). However, what drives amyloid buildup in sporadic nongenetic cases of AD is still unknown. AD brains feature an inflammatory reaction around amyloid plaques, and a specific subset of the gut microbiota (GMB) may promote brain inflammation. We investigated the possible role of the GMB in AD pathogenesis by studying the association of brain amyloidosis with (1) GMB taxa with pro- and anti-inflammatory activity; and (2) peripheral inflammation in cognitively impaired patients...
January 2017: Neurobiology of Aging
https://www.readbyqxmd.com/read/27754286/br-07-1-development-of-the-cell-microarray-for-high-throughput-analysis-of-gut-microbiota
#10
Seong-Tshool Hong
The human intestine contains a massive and complex microbial community called gut microbiota. A typical human carries 100 trillion microbes in his/her body which is 10 times greater than the number of their host cells, i.e. whole number of human cells. A combined microbial genome constituting gut microbiota is well excess our own human genome. The microbial composition of gut microbiotata and its role on diseases became a booming area of research, presenting a new paradigm of opportunities for modern medicines...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27643284/br-07-1-development-of-the-cell-microarray-for-high-throughput-analysis-of-gut-microbiota
#11
Seong-Tshool Hong
The human intestine contains a massive and complex microbial community called gut microbiota. A typical human carries 100 trillion microbes in his/her body which is 10 times greater than the number of their host cells, i.e. whole number of human cells. A combined microbial genome constituting gut microbiota is well excess our own human genome. The microbial composition of gut microbiotata and its role on diseases became a booming area of research, presenting a new paradigm of opportunities for modern medicines...
September 2016: Journal of Hypertension
https://www.readbyqxmd.com/read/27634977/role-of-gut-microbiota-and-nutrients-in-amyloid-formation-and-pathogenesis-of-alzheimer-disease
#12
Francesca Pistollato, Sandra Sumalla Cano, Iñaki Elio, Manuel Masias Vergara, Francesca Giampieri, Maurizio Battino
It has been hypothesized that alterations in the composition of the gut microbiota might be associated with the onset of certain human pathologies, such as Alzheimer disease, a neurodegenerative syndrome associated with cerebral accumulation of amyloid-β fibrils. It has been shown that bacteria populating the gut microbiota can release significant amounts of amyloids and lipopolysaccharides, which might play a role in the modulation of signaling pathways and the production of proinflammatory cytokines related to the pathogenesis of Alzheimer disease...
October 2016: Nutrition Reviews
https://www.readbyqxmd.com/read/27604604/the-gut-brain-axis-including-the-microbiome-leaky-gut-and-bacterial-translocation-mechanisms-and-pathophysiological-role-in-alzheimer-s-disease
#13
Cristiano A Köhler, Michael Maes, Anastasiya Slyepchenko, Michael Berk, Marco Solmi, Krista L Lanctôt, André F Carvalho
Alzheimer's disease (AD), the most common form of dementia, is a progressive disorder manifested by gradual memory loss and subsequent impairment in mental and behavioral functions. Though the primary risk factor for AD is advancing age, other factors such as diabetes mellitus, hyperlipidemia, obesity, vascular factors and depression play a role in its pathogenesis. The human gastrointestinal tract has a diverse commensal microbial population, which has bidirectional interactions with the human host that are symbiotic in health, and in addition to nutrition, digestion, plays major roles in inflammation and immunity...
September 6, 2016: Current Pharmaceutical Design
https://www.readbyqxmd.com/read/27566465/alzheimer-s-disease-and-gut-microbiota
#14
REVIEW
Xu Hu, Tao Wang, Feng Jin
Alzheimer's disease (AD) is a most common neurodegenerative disorder, which associates with impaired cognition. Gut microbiota can modulate host brain function and behavior via microbiota-gut-brain axis, including cognitive behavior. Germ-free animals, antibiotics, probiotics intervention and diet can induce alterations of gut microbiota and gut physiology and also host cognitive behavior, increasing or decreasing risks of AD. The increased permeability of intestine and blood-brain barrier induced by gut microbiota disturbance will increase the incidence of neurodegeneration disorders...
October 2016: Science China. Life Sciences
https://www.readbyqxmd.com/read/27488422/lithium-restores-age-related-olfactory-impairment-in-the-ts65dn-mouse-model-of-down-syndrome
#15
Sandra Guidi, Patrizia Bianchi, Fiorenza Stagni, Andrea Giacomini, Marco Emili, Stefania Trazzi, Elisabetta Ciani, Renata Bartesaghi
In this review we look at this biological overlaps of neurodegenerative and psychiatric conditions, as exemplified by major depressive disorder (MDD). Recent work has highlighted how immune-inflammatory processes and their interactions with oxidative and nitrosative stress (O&NS), couple to drive changes in neuroregulatory tryptophan catabolite (TRYCAT), with consequences for serotonin availability for the melatonergic pathways. Such work significantly questions the validity and utility of non-biologically based current classification systems for psychiatric and neurodegenerative conditions...
August 1, 2016: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/27443609/antibiotic-induced-perturbations-in-gut-microbial-diversity-influences-neuro-inflammation-and-amyloidosis-in-a-murine-model-of-alzheimer-s-disease
#16
Myles R Minter, Can Zhang, Vanessa Leone, Daina L Ringus, Xiaoqiong Zhang, Paul Oyler-Castrillo, Mark W Musch, Fan Liao, Joseph F Ward, David M Holtzman, Eugene B Chang, Rudolph E Tanzi, Sangram S Sisodia
Severe amyloidosis and plaque-localized neuro-inflammation are key pathological features of Alzheimer's disease (AD). In addition to astrocyte and microglial reactivity, emerging evidence suggests a role of gut microbiota in regulating innate immunity and influencing brain function. Here, we examine the role of the host microbiome in regulating amyloidosis in the APPSWE/PS1ΔE9 mouse model of AD. We show that prolonged shifts in gut microbial composition and diversity induced by long-term broad-spectrum combinatorial antibiotic treatment regime decreases Aβ plaque deposition...
2016: Scientific Reports
https://www.readbyqxmd.com/read/27340848/the-effects-of-lw-afc-on-intestinal-microbiome-in-senescence-accelerated-mouse-prone-8-strain-a-mouse-model-of-alzheimer-s-disease
#17
Jianhui Wang, Fuqiang Ye, Xiaorui Cheng, Xiaorui Zhang, Feng Liu, Gang Liu, Ming Ni, Shanyi Qiao, Wenxia Zhou, Yongxiang Zhang
Microbes have deserved broader attention as causal factors in Alzheimer's disease (AD), a neurodegenerative disorder. The senescence-accelerated mouse prone 8 (SAMP8) strain, a spontaneous mice of accelerated aging, are considered a robust model for sporadic AD. LW-AFC, an herbal medicine, was prepared from LiuweiDihuang decoction, which is a classical traditional Chinese medicine prescription. Here, we showed that the treatment of LW-AFC improved cognitive impairments of SAMP8 mice, including spatial learning and memory ability, active avoidance response, and object recognition memory capability...
June 18, 2016: Journal of Alzheimer's Disease: JAD
https://www.readbyqxmd.com/read/26559394/pomegranate-s-neuroprotective-effects-against-alzheimer-s-disease-are-mediated-by-urolithins-its-ellagitannin-gut-microbial-derived-metabolites
#18
Tao Yuan, Hang Ma, Weixi Liu, Daniel B Niesen, Nishan Shah, Rebecca Crews, Kenneth N Rose, Dhiraj A Vattem, Navindra P Seeram
Pomegranate shows neuroprotective effects against Alzheimer's disease (AD) in several reported animal studies. However, whether its constituent ellagitannins and/or their physiologically relevant gut microbiota-derived metabolites, namely, urolithins (6H-dibenzo[b,d]pyran-6-one derivatives), are the responsible bioactive constituents is unknown. Therefore, from a pomegranate extract (PE), previously reported by our group to have anti-AD effects in vivo, 21 constituents, which were primarily ellagitannins, were isolated and identified (by HPLC, NMR, and HRESIMS)...
January 20, 2016: ACS Chemical Neuroscience
https://www.readbyqxmd.com/read/25642988/non-celiac-gluten-sensitivity-triggers-gut-dysbiosis-neuroinflammation-gut-brain-axis-dysfunction-and-vulnerability-for-dementia
#19
REVIEW
Mak Adam Daulatzai
The non-celiac gluten sensitivity (NCGS) is a chronic functional gastrointestinal disorder which is very common world wide. The human gut harbors microbiota which has a wide variety of microbial organisms; they are mainly symbiotic and important for well being. However, "dysbiosis" - i.e. an alteration in normal commensal gut microbiome with an increase in pathogenic microbes, impacts homeostasis/health. Dysbiosis in NCGS causes gut inflammation, diarrhea, constipation, visceral hypersensitivity, abdominal pain, dysfunctional metabolic state, and peripheral immune and neuro-immune communication...
2015: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/25589730/mechanisms-of-molecular-mimicry-involving-the-microbiota-in-neurodegeneration
#20
REVIEW
Robert P Friedland
The concept of molecular mimicry was established to explain commonalities of structure which developed in response to evolutionary pressures. Most examples of molecular mimicry in medicine have involved homologies of primary protein structure which cause disease. Molecular mimicry can be expanded beyond amino acid sequence to include microRNA and proteomic effects which are either pathogenic or salutogenic (beneficial) in regard to Parkinson's disease, Alzheimer's disease, and related disorders. Viruses of animal or plant origin may mimic nucleotide sequences of microRNAs and influence protein expression...
2015: Journal of Alzheimer's Disease: JAD
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