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https://www.readbyqxmd.com/read/29148060/gutsy-moves-the-amygdala-as-a-critical-node-in-microbiota-to-brain-signaling
#1
REVIEW
Caitlin S M Cowan, Alan E Hoban, Ana Paula Ventura-Silva, Timothy G Dinan, Gerard Clarke, John F Cryan
The amygdala is a key brain area regulating responses to stress and emotional stimuli, so improving our understanding of how it is regulated could offer novel strategies for treating disturbances in emotion regulation. As we review here, a growing body of evidence indicates that the gut microbiota may contribute to a range of amygdala-dependent brain functions from pain sensitivity to social behavior, emotion regulation, and therefore, psychiatric health. In addition, it appears that the microbiota is necessary for normal development of the amygdala at both the structural and functional levels...
November 17, 2017: BioEssays: News and Reviews in Molecular, Cellular and Developmental Biology
https://www.readbyqxmd.com/read/29147024/comparison-of-r-ketamine-and-lanicemine-on-depression-like-phenotype-and-abnormal-composition-of-gut-microbiota-in-a-social-defeat-stress-model
#2
Youge Qu, Chun Yang, Qian Ren, Min Ma, Chao Dong, Kenji Hashimoto
Accumulating evidence suggests a key role of the gut-microbiota-brain axis in the antidepressant actions of certain compounds. Ketamine, an N-methyl-D-aspartate receptor (NMDAR) antagonist, showed rapid and sustained antidepressant effects in treatment-resistant depressed patients. In contrast, another NMDAR antagonist, lanicemine, did not exhibit antidepressant effects in such patients. (R)-ketamine, the (R)-enantiomer of ketamine, has rapid-acting and long-lasting antidepressant effects in rodent models of depression...
November 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29146657/a-randomised-controlled-trial-of-a-duodenal-jejunal-bypass-sleeve-device-endobarrier-compared-with-standard-medical-therapy-for-the-management-of-obese-subjects-with-type-2-diabetes-mellitus
#3
Michael Alan Glaysher, Aruchuna Mohanaruban, Christina Gabriele Prechtl, Anthony P Goldstone, Alexander Dimitri Miras, Joanne Lord, Navpreet Chhina, Emanuela Falaschetti, Nicholas Andrew Johnson, Werd Al-Najim, Claire Smith, Jia V Li, Mayank Patel, Ahmed R Ahmed, Michael Moore, Neil Poulter, Stephen Bloom, Ara Darzi, Carel Le Roux, James P Byrne, Julian P Teare
INTRODUCTION: The prevalence of obesity and obesity-related diseases, including type 2 diabetes mellitus (T2DM), is increasing. Exclusion of the foregut, as occurs in Roux-en-Y gastric bypass, has a key role in the metabolic improvements that occur following bariatric surgery, which are independent of weight loss. Endoscopically placed duodenal-jejunal bypass sleeve devices, such as the EndoBarrier (GI Dynamics, Lexington, Massachusetts, USA), have been designed to create an impermeable barrier between chyme exiting the stomach and the mucosa of the duodenum and proximal jejunum...
November 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/29146029/gut-brain-axis-and-its-microbiota-regulation-in-mammals-and-birds
#4
REVIEW
Jan S Suchodolski
This article provides a brief overview of the advances made in microbiota research in parrots and pet birds. It describes this complex ecosystem and the contribution of the intestinal microbiota to host health and disease, including the nervous system.
January 2018: Veterinary Clinics of North America. Exotic Animal Practice
https://www.readbyqxmd.com/read/29145012/the-gut-brain-interaction-in-opioid-tolerance
#5
REVIEW
Hamid I Akbarali, William L Dewey
The prevailing opioid crisis has necessitated the need to understand mechanisms leading to addiction and tolerance, the major contributors to overdose and death and to develop strategies for developing drugs for pain treatment that lack abuse liability and side-effects. Opioids are commonly used for treatment of pain and symptoms of inflammatory bowel disease. The significant effect of opioids in the gut, both acute and chronic, includes persistent constipation and paradoxically may also worsen pain symptoms...
November 13, 2017: Current Opinion in Pharmacology
https://www.readbyqxmd.com/read/29139482/opioid-misuse-in-gastroenterology-and-non-opioid-management-of-abdominal-pain
#6
REVIEW
Eva Szigethy, Mitchell Knisely, Douglas Drossman
Opioids were one of the earliest classes of medications used for pain across a variety of conditions, but morbidity and mortality have been increasingly associated with their chronic use. Despite these negative consequences, chronic opioid use is increasing worldwide, with the USA and Canada having the highest rates. Chronic opioid use for noncancer pain can have particularly negative effects in the gastrointestinal and central nervous systems, including opioid-induced constipation, narcotic bowel syndrome, worsening psychopathology and addiction...
November 15, 2017: Nature Reviews. Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/29136611/gut-microbiota-in-health-and-disease
#7
Yuichiro Yamashiro
Intestinal regulatory T (Treg) cells are critical to maintaining immune tolerance to dietary antigens and gut microbiota. This paper reviews several papers on this topic that were recently published by Japanese researchers. Specifically, Prof. K. Honda and his group have found that commensal microbiota capable of metabolizing butyrate induces the differentiation of colonic Treg cells. In a separate work, Prof. Y. Yokoyama and his group used a novel, culture-independent analytical method (the Yakult Intestinal Flora-Scan) for detection of bacteria in the bloodstream...
November 14, 2017: Annals of Nutrition & Metabolism
https://www.readbyqxmd.com/read/29135961/probiotic-prebiotic-and-brain-development
#8
REVIEW
Tomás Cerdó, Alicia Ruíz, Antonio Suárez, Cristina Campoy
Recently, a number of studies have demonstrated the existence of a link between the emotional and cognitive centres of the brain and peripheral functions through the bi-directional interaction between the central nervous system and the enteric nervous system. Therefore, the use of bacteria as therapeutics has attracted much interest. Recent research has found that there are a variety of mechanisms by which bacteria can signal to the brain and influence several processes in relation to neurotransmission, neurogenesis, and behaviour...
November 14, 2017: Nutrients
https://www.readbyqxmd.com/read/29134359/anxiety-depression-and-the-microbiome-a-role-for-gut-peptides
#9
REVIEW
Gilliard Lach, Harriet Schellekens, Timothy G Dinan, John F Cryan
The complex bidirectional communication between the gut and the brain is finely orchestrated by different systems, including the endocrine, immune, autonomic, and enteric nervous systems. Moreover, increasing evidence supports the role of the microbiome and microbiota-derived molecules in regulating such interactions; however, the mechanisms underpinning such effects are only beginning to be resolved. Microbiota-gut peptide interactions are poised to be of great significance in the regulation of gut-brain signaling...
November 13, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29133954/exogenous-ghrelin-administration-increases-alcohol-self-administration-and-modulates-brain-functional-activity-in-heavy-drinking-alcohol-dependent-individuals
#10
M Farokhnia, E N Grodin, M R Lee, E N Oot, A N Blackburn, B L Stangl, M L Schwandt, L A Farinelli, R Momenan, V A Ramchandani, L Leggio
Preclinical evidence suggests that ghrelin, a peptide synthesized by endocrine cells of the stomach and a key component of the gut-brain axis, is involved in alcohol seeking as it modulates both central reward and stress pathways. However, whether and how ghrelin administration may impact alcohol intake in humans is not clear. For, we believe, the first time, this was investigated in the present randomized, crossover, double-blind, placebo-controlled, human laboratory study. Participants were non-treatment-seeking alcohol-dependent heavy-drinking individuals...
November 14, 2017: Molecular Psychiatry
https://www.readbyqxmd.com/read/29130724/probiotics-for-fibromyalgia-study-design-for-a-pilot-double-blind-randomized-controlled-trial
#11
Pablo Roman, Ángeles F Estévez, Nuria Sánchez-Labraca, Fernando Cañadas, Alonso Miras, Diana Cardona
BACKGROUND: Fibromyalgia syndrome (FMS) is a chronic, generalized and diffuse pain disorder accompanied by other symptoms such as emotional and cognitive deficits. The FMS patients show a high prevalence of gastrointestinal symptoms. Recently it has been found that microbes in the gut may regulate brain processes through the gut-microbiota-brain axis, modulating thus affection, motivation and higher cognitive functions. Therefore, the use of probiotics might be a new treatment that could improve the physical, psychological and cognitive state in FMS; however, no evidence about this issue is available...
October 24, 2017: Nutrición Hospitalaria: Organo Oficial de la Sociedad Española de Nutrición Parenteral y Enteral
https://www.readbyqxmd.com/read/29130504/mass-spectrometry-based-metabolomics-targeting-the-crosstalk-between-gut-microbiota-and-brain-in-neurodegenerative-disorders
#12
REVIEW
Hemi Luan, Xian Wang, Zongwei Cai
Metabolomics seeks to take a "snapshot" in a time of the levels, activities, regulation and interactions of all small molecule metabolites in response to a biological system with genetic or environmental changes. The emerging development in mass spectrometry technologies has shown promise in the discovery and quantitation of neuroactive small molecule metabolites associated with gut microbiota and brain. Significant progress has been made recently in the characterization of intermediate role of small molecule metabolites linked to neural development and neurodegenerative disorder, showing its potential in understanding the crosstalk between gut microbiota and the host brain...
November 12, 2017: Mass Spectrometry Reviews
https://www.readbyqxmd.com/read/29128903/impairment-of-thiamine-transport-at-the-gut-bbb-axis-contributes-to-wernicke-s-encephalopathy
#13
P M Abdul-Muneer, Saleena Alikunju, Heather Schuetz, Adam M Szlachetka, Xiaotang Ma, James Haorah
Wernicke's encephalopathy, a common neurological disease, is caused by thiamine (vitamin B1) deficiency. Neuropathy resulting from thiamine deficiency is a hallmark of Wernicke-Korsakoff syndrome in chronic alcohol users. The underlying mechanisms of this deficiency and progression of neuropathy remain to be understood. To uncover the unknown mechanisms of thiamine deficiency in alcohol abuse, we used chronic alcohol consumption or thiamine deficiency diet ingestion in animal models. Observations from animal models were validated in primary human neuronal culture for neurodegenerative process...
November 11, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/29122501/psychoneuroimmunological-approach-to-gastrointestinal-related-pain
#14
REVIEW
Karlo Toljan, Bruce Vrooman
BACKGROUND AND PURPOSE (AIMS): Psychoneuroimmunology is both a theoretical and practical field of medicine in which human biology and psychology are considered an interconnected unity. Through such a framework it is possible to elucidate complex syndromes in gastrointestinal related pain, particularly chronic non-malignant. The aim is to provide insight into pathophysiological mechanisms and suggest treatment modalities according to a comprehensive paradigm. The article also presents novel findings that may guide clinicians to recognize new targets or scientists to find new research topics...
November 6, 2017: Scandinavian Journal of Pain
https://www.readbyqxmd.com/read/29122491/inflammation-and-autism-from-maternal-gut-to-fetal-brain
#15
Ivan Osokine, Adrian Erlebacher
Maternal immune activation (MIA) during pregnancy is associated with an increased risk of behavioral disorders in the offspring of affected mothers. Two recent studies highlight how maternal inflammation disrupts inhibitory interneuron networks and suggest that the maternal gut microbiome may be a contributing risk factor for MIA-induced behavioral abnormalities.
November 6, 2017: Trends in Molecular Medicine
https://www.readbyqxmd.com/read/29119385/intestinal-permeabiliy-in-relapsing-remitting-multiple-sclerosis
#16
REVIEW
M C Buscarinu, S Romano, R Mechelli, R Pizzolato Umeton, M Ferraldeschi, A Fornasiero, R Reniè, B Cerasoli, E Morena, C Romano, N D Loizzo, R Umeton, M Salvetti, G Ristori
Changes of intestinal permeability (IP) have been extensively investigated in inflammatory bowel diseases (IBD) and celiac disease (CD), underpinned by a known unbalance between microbiota, IP and immune responses in the gut. Recently the influence of IP on brain function has greatly been appreciated. Previous works showed an increased IP that preceded experimental autoimmune encephalomyelitis development and worsened during disease with disruption of TJ. Moreover, studying co-morbidity between Crohn's disease and MS, a report described increased IP in a minority of cases with MS...
November 8, 2017: Neurotherapeutics: the Journal of the American Society for Experimental NeuroTherapeutics
https://www.readbyqxmd.com/read/29118721/gut-brain-axis-in-regulation-of-blood-pressure
#17
REVIEW
Tao Yang, Jasenka Zubcevic
Hypertension (HTN) is an escalating health issue worldwide. It is estimated that 1.56 billion people will suffer from high blood pressure (BP) by 2025. Recent studies reported an association between gut dysbiosis and HTN, thus proposing interesting avenues for novel treatments of this condition. The sympathetic nervous system (SNS) and the immune system (IS) play a recognized role in the onset and progression of HTN, while reciprocal communication between gut microbiota and the brain can regulate BP by modulating the interplay between the IS and SNS...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/29117778/serotonin-a-mediator-of-the-gut-brain-axis-in-multiple-sclerosis
#18
Tsveta S Malinova, Christine D Dijkstra, Helga E de Vries
BACKGROUND: The significance of the gut microbiome for the pathogenesis of multiple sclerosis (MS) has been established, although the underlying signaling mechanisms of this interaction have not been sufficiently explored. OBJECTIVES: We address this point and use serotonin (5-hydroxytryptamine (5-HT))-a microbial-modulated neurotransmitter (NT) as a showcase to demonstrate that NTs regulated by the gut microbiome are potent candidates for mediators of the gut-brain axis in demyelinating disorders...
November 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/29113464/a-new-treatment-strategy-for-parkinson-s-disease-through-the-gut-brain-axis-the-glucagon-like-peptide-1-receptor-pathway
#19
Dong Seok Kim, Ho-Il Choi, Yun Wang, Yu Luo, Barry J Hoffer, Nigel H Greig
Molecular communications in the gut-brain axis, between the central nervous system and the gastrointestinal tract, are critical for maintaining healthy brain function, particularly in aging. Epidemiological analyses indicate type 2 diabetes mellitus (T2DM) is a risk factor for neurodegenerative disorders including Alzheimer's disease (AD) and Parkinson's diseases (PD) for which aging shows a major correlative association. Common pathophysiological features exist between T2DM, AD, and PD, including oxidative stress, inflammation, insulin resistance, abnormal protein processing, and cognitive decline, and suggest that effective drugs for T2DM that positively impact the gut-brain axis could provide an effective treatment option for neurodegenerative diseases...
September 2017: Cell Transplantation
https://www.readbyqxmd.com/read/29109537/neuroprotective-effect-of-ruminococcus-albus-on-oxidatively-stressed-sh-sy5y-cells-and-animals
#20
Jieun Park, Jiyun Lee, Zia Yeom, Donghyuk Heo, Young-Hee Lim
Recent evidence shows that the gut microbiota has an important role in gut-brain crosstalk and is linked to neuronal disorders. The aim of this study was to investigate the effects of intestinal Ruminococcus albus with probiotic potential on neuroprotection in oxidatively stressed SH-SY5Y neuroblastoma cells and animals. To investigate these effects, conditioned medium was prepared using Caco-2 cells cultured with heat-killed R. albus (CRA-CM). Caco-2 cells cultured with heat-killed R. albus showed increased BDNF expression and BDNF protein levels increased in CRA-CM...
November 6, 2017: Scientific Reports
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