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https://www.readbyqxmd.com/read/29702431/short-chain-fatty-acids-suppress-food-intake-by-activating-vagal-afferent-neurons
#1
Chayon Goswami, Yusaku Iwasaki, Toshihiko Yada
Fermentable carbohydrates including dietary fibers and resistant starch produce short-chain fatty acids (SCFAs), including acetate, propionate and butyrate, through microbial fermentation in the intestine of rodents and humans. Consumption of fermentable carbohydrate and SCFAs suppress food intake, an effect involving the brain. However, their signaling pathway to the brain remains unclear. Vagal afferents serve to link intestinal information to the brain. In the present study, we explored possible role of vagal afferents in the anorexigenic effect of SCFAs...
March 17, 2018: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/29681793/autonomic-and-brain-morphological-predictors-of-stress-resilience
#2
REVIEW
Luca Carnevali, Julian Koenig, Andrea Sgoifo, Cristina Ottaviani
Stressful life events are an important cause of psychopathology. Humans exposed to aversive or stressful experiences show considerable inter-individual heterogeneity in their responses. However, the majority does not develop stress-related psychiatric disorders. The dynamic processes encompassing positive and functional adaptation in the face of significant adversity have been broadly defined as resilience . Traditionally, the assessment of resilience has been confined to self-report measures, both within the general community and putative high-risk populations...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29673577/profiling-of-g-protein-coupled-receptors-in-vagal-afferents-reveals-novel-gut-to-brain-sensing-mechanisms
#3
Kristoffer L Egerod, Natalia Petersen, Pascal N Timshel, Jens C Rekling, Yibing Wang, Qinghua Liu, Thue W Schwartz, Laurent Gautron
OBJECTIVES: G protein-coupled receptors (GPCRs) act as transmembrane molecular sensors of neurotransmitters, hormones, nutrients, and metabolites. Because unmyelinated vagal afferents richly innervate the gastrointestinal mucosa, gut-derived molecules may directly modulate the activity of vagal afferents through GPCRs. However, the types of GPCRs expressed in vagal afferents are largely unknown. Here, we determined the expression profile of all GPCRs expressed in vagal afferents of the mouse, with a special emphasis on those innervating the gastrointestinal tract...
April 3, 2018: Molecular Metabolism
https://www.readbyqxmd.com/read/29670504/clozapine-induced-cardiovascular-side-effects-and-autonomic-dysfunction-a-systematic-review
#4
Jessica W Y Yuen, David D Kim, Ric M Procyshyn, Randall F White, William G Honer, Alasdair M Barr
Background: Clozapine is the antipsychotic of choice for treatment-resistant schizophrenia and has minimal risk for extrapyramidal symptoms. Therapeutic benefits, however, are accompanied by a myriad of cardiometabolic side-effects. The specific reasons for clozapine's high propensity to cause adverse cardiometabolic events remain unknown, but it is believed that autonomic dysfunction may play a role in many of these. Objective: This systematic review summarizes the literature on autonomic dysfunction and related cardiovascular side effects associated with clozapine treatment...
2018: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29661827/oral-nahco-3-activates-a-splenic-anti-inflammatory-pathway-evidence-that-cholinergic-signals-are-transmitted-via-mesothelial-cells
#5
Sarah C Ray, Babak Baban, Matthew A Tucker, Alec J Seaton, Kyu Chul Chang, Elinor C Mannon, Jingping Sun, Bansari Patel, Katie Wilson, Jacqueline B Musall, Hiram Ocasio, Debra Irsik, Jessica A Filosa, Jennifer C Sullivan, Brendan Marshall, Ryan A Harris, Paul M O'Connor
We tested the hypothesis that oral NaHCO3 intake stimulates splenic anti-inflammatory pathways. Following oral NaHCO3 loading, macrophage polarization was shifted from predominantly M1 (inflammatory) to M2 (regulatory) phenotypes, and FOXP3+ CD4+ T-lymphocytes increased in the spleen, blood, and kidneys of rats. Similar anti-inflammatory changes in macrophage polarization were observed in the blood of human subjects following NaHCO3 ingestion. Surprisingly, we found that gentle manipulation to visualize the spleen at midline during surgical laparotomy (sham splenectomy) was sufficient to abolish the response in rats and resulted in hypertrophy/hyperplasia of the capsular mesothelial cells...
April 16, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29601305/noninvasive-neuromodulation-in-migraine-and-cluster-headache
#6
Amaal Starling
PURPOSE OF REVIEW: The purpose of this narrative review is to provide an overview of the currently available noninvasive neuromodulation devices for the treatment of migraine and cluster headache. RECENT FINDINGS: Over the last decade, several noninvasive devices have undergone development and clinical trials to evaluate efficacy and safety. Based on this body of work, single-pulse transcranial magnetic stimulation, transcutaneous supraorbital neurostimulation, and noninvasive vagal nerve stimulation devices have been cleared by the United States Food and Drug Administration and are available for clinical use for the treatment of primary headache disorders...
March 29, 2018: Current Opinion in Neurology
https://www.readbyqxmd.com/read/29597355/novel-transmitters-in-brainstem-vagal-neurocircuitry-new-players-on-the-pitch
#7
Mehmet Bülbül, R Alberto Travagli
The last few decades have seen a major increase in the number of neurotransmitters and neuropeptides recognized as playing a role in brainstem neurocircuits, including those involved in homeostatic functions such as stress responsiveness, gastrointestinal (GI) motility, feeding, and/or arousal/wakefulness. This mini-review will focus on the known physiological role of three of these novel neuropeptides, i.e. apelin, nesfatin-1 and neuropeptide-S (NPS) with a special emphasis on their hypothetical roles in vagal signaling related to GI motor functions...
March 29, 2018: American Journal of Physiology. Gastrointestinal and Liver Physiology
https://www.readbyqxmd.com/read/29596112/vagal-dysfunction-and-small-intestinal-bacterial-overgrowth-novel-pathways-to-chronic-inflammation-in-hiv
#8
Jessica Robinson-Papp, Alexandra Nmashie-Osei, Elizabeth Pedowitz, Emma K T Benn, Mary C George, Sandeep Sharma, Jacinta Murray, Josef Machac, Sherif Heiba, Saurabh Mehandru, Seunghee Kim-Schulze, Allison Navis, Isabel Elicer, Susan Morgello
OBJECTIVE: Chronic inflammation in HIV-infected individuals drives disease progression and the development of comorbidities, despite viral suppression with combined antiretroviral therapy. Here, we sought evidence that vagal dysfunction, which occurs commonly as part of HIV-associated autonomic neuropathy, could exacerbate inflammation through gastrointestinal dysmotility, small intestinal bacterial overgrowth (SIBO), and alterations in patterns of soluble immune mediators. DESIGN: This is a cross-sectional observational study...
March 28, 2018: AIDS
https://www.readbyqxmd.com/read/29568937/genetic-analysis-of-sick-sinus-syndrome-in-a-family-harboring-compound-cacna1c-and-ttn-mutations
#9
Yao-Bin Zhu, Jie-Wei Luo, Fen Jiang, Gui Liu
Sick sinus syndrome (SSS) is a sinus node dysfunction characterized by severe sinus bradycardia. SSS results in insufficient blood supply to the brain, heart, kidneys, and other organs and is associated with the increased risk of sudden cardiac death. Bradyarrhythmia appears in the absence of any associated cardiac pathology and displays a genetic legacy. The present study identified a family with primary manifestation of sinus bradycardia (five individuals) along with early repolarization (four individuals) and atrial fibrillation (one individual)...
March 16, 2018: Molecular Medicine Reports
https://www.readbyqxmd.com/read/29526583/identifying-potential-quality-markers-of-xin-su-ning-capsules-acting-on-arrhythmia-by-integrating-uhplc-ltq-orbitrap-adme-prediction-and-network-target-analysis
#10
Rui Guo, Xiaoxiao Zhang, Jin Su, Haiyu Xu, Yanqiong Zhang, Fangbo Zhang, Defeng Li, Yi Zhang, Xuefeng Xiao, Shuangcheng Ma, Hongjun Yang
BACKGROUND: Quality marker (Q-markers) has been proposed as a novel concept for quality evaluation and standard elaboration of traditional Chinese medicine (TCM). Xin-Su-Ning capsule (XSNC) has been extensively used for the treatment of arrhythmia with the satisfactory therapeutic effects in clinics. However, it is lack of reliable and effective Q-markers of this prescription. PURPOSE: To identify potential Q-markers of XSNC against arrhythmia. STUDY DESIGN: An integrative pharmacology-based investigation was performed...
February 10, 2018: Phytomedicine: International Journal of Phytotherapy and Phytopharmacology
https://www.readbyqxmd.com/read/29522782/cortical-stimulation-in-conscious-rats-controls-joint-inflammation
#11
Gabriel Shimizu Bassi, Luis Ulloa, Victor Rodrigues Santos, Flávio Del Vecchio, Polianna Delfino-Pereira, Gerson Jhonatan Rodrigues, Jaci Airton Castania, Fernando de Queiróz Cunha, Hélio Cesar Salgado, Thiago Mattar Cunha, Norberto Garcia-Cairasco, Alexandre Kanashiro
The neuronal control of the immune system is fundamental to the development of new therapeutic strategies for inflammatory disorders. Recent studies reported that afferent vagal stimulation attenuates peripheral inflammation by activating specific sympathetic central and peripheral networks, but only few subcortical brain areas were investigated. In the present study, we report that afferent vagal stimulation also activates specific cortical areas, as the parietal and cingulate cortex. Since these cortical structures innervate sympathetic-related areas, we investigate whether electrical stimulation of parietal cortex can attenuate knee joint inflammation in non-anesthetized rats...
June 8, 2018: Progress in Neuro-psychopharmacology & Biological Psychiatry
https://www.readbyqxmd.com/read/29473956/cardiac-vagal-flexibility-and-accurate-personality-impressions-examining-a-physiological-correlate-of-the-good-judge
#12
Lauren J Human, Wendy Berry Mendes
OBJECTIVE: Research has long sought to identify which individuals are best at accurately perceiving others' personalities or are good judges, yet consistent predictors of this ability have been difficult to find. In the current studies, we revisit this question by examining a novel physiological correlate of social sensitivity, cardiac vagal flexibility, which reflects dynamic modulation of cardiac vagal control. METHOD: We examined whether greater cardiac vagal flexibility was associated with forming more accurate personality impressions, defined as viewing targets more in line with their distinctive self-reported profile of traits, in two studies, including a thin-slice video perceptions study (N = 109) and a dyadic interaction study (N = 175)...
February 23, 2018: Journal of Personality
https://www.readbyqxmd.com/read/29472865/intracranial-pressure-is-a-determinant-of-sympathetic-activity
#13
Eric A Schmidt, Fabien Despas, Anne Pavy-Le Traon, Zofia Czosnyka, John D Pickard, Kamal Rahmouni, Atul Pathak, Jean M Senard
Intracranial pressure (ICP) is the pressure within the cranium . ICP rise compresses brain vessels and reduces cerebral blood delivery. Massive ICP rise leads to cerebral ischemia, but it is also known to produce hypertension, bradycardia and respiratory irregularities due to a sympatho-adrenal mechanism termed Cushing response. One still unresolved question is whether the Cushing response is a non-synaptic acute brainstem ischemic mechanism or part of a larger physiological reflex for arterial blood pressure control and homeostasis regulation...
2018: Frontiers in Physiology
https://www.readbyqxmd.com/read/29452132/effect-of-the-gstm1-gene-deletion-on-glycemic-variability-sympatho-vagal-balance-and-arterial-stiffness-in-patients-with-metabolic-syndrome-but-without-diabetes
#14
Andrea Iorio, Dorina Ylli, Renato Polimanti, Fabiana Picconi, Paola Maggio, Davide Francomano, Antonio Aversa, Dario Manfellotto, Maria Fuciarelli, Simona Frontoni
AIMS: An increased rate of cerebrovascular complications in patients with metabolic syndrome (MetS) has been reported. Previous studies demonstrated an association between glycemic variability (GV) and cerebrovascular reactivity (CRV) in MetS, thus suggesting a putative role of GV on cerebrovascular events. Although the pathophysiological mechanism linking GV to damage is still to be elucidated, evidence suggests oxidative stress plays a crucial role. Since functional variants in glutathione S-transferases (GST) genes modulate the cellular detoxification processes, the aim of this study was to elucidate the involvement of GSTs in MetS and investigating the correlation with GV, arterial stiffness, and sympatho-vagal (SV) balance...
April 2018: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/29450627/can-the-use-of-a-single-integrated-unitary-autonomic-index-provide-early-clues-for-eventual-eligibility-for-olympic-games
#15
Daniela Lucini, Roberto Sala, Antonio Spataro, Mara Malacarne, Manuela Benzi, Stefano Tamorri, Massimo Pagani
PURPOSE: Optimal autonomic regulation and stress resilience might be considered critical elements of athletic performance. We hypothesize that a novel unitary autonomic index for sports (ANSIs), together with a somatic stress related symptom score (4SQ) might help characterize athletes who were eventually selected for the Rio 2016 Olympic Games Italian team (Rio +). METHODS: In this retrospective study we examined 778 athletes (age 24.4 ± 6.7 yrs) who underwent a planned yearly pre-participation screening...
February 15, 2018: European Journal of Applied Physiology
https://www.readbyqxmd.com/read/29446712/measures-of-sympathetic-and-parasympathetic-autonomic-outflow-from-heartbeat-dynamics
#16
Gaetano Valenza, Luca Citi, J Phillip Saul, Riccardo Barbieri
Reliable and effective non-invasive measures of sympathetic and parasympathetic peripheral outflow are of crucial importance in cardiovascular physiology. Although many techniques have been proposed to take up this long-lasting challenge, none has proposed a satisfying discrimination of the dynamics of the two separate branches. Spectral analysis of heart rate variability is the most currently used technique for such assessment. Despite its widespread use, it has been demonstrated that the subdivision in the low frequency (LF) and high frequency (HF) bands does not fully reflect separate influences of the sympathetic and parasympathetic branches, respectively, mainly due to their simultaneous action in the LF...
February 15, 2018: Journal of Applied Physiology
https://www.readbyqxmd.com/read/29429029/very-high-frequency-oscillations-of-heart-rate-variability-in-healthy-humans-and-in-patients-with-cardiovascular-autonomic-neuropathy
#17
Mario Estévez-Báez, Calixto Machado, Julio Montes-Brown, Javier Jas-García, Gerry Leisman, Adam Schiavi, Andrés Machado-García, Claudia Carricarte-Naranjo, Eli Carmeli
Literature reports on the very high frequency (VHF) range of 0.4-0.9 Hz in heart rate variability (HRV) are scanty. The VHF presence in cardiac transplant patients and other conditions associated with reduced vagal influence on the heart encouraged us to explore this spectral band in healthy subjects and in patients diagnosed with cardiac autonomic neuropathy (CAN), and to assess the potential clinical value of some VHF indices. The study included 80 healthy controls and 48 patients with spinocerebellar ataxia type 2 (SCA2) with CAN...
February 11, 2018: Advances in Experimental Medicine and Biology
https://www.readbyqxmd.com/read/29399541/cholinergic-anti-inflammatory-pathway-and-the-liver
#18
REVIEW
Khalil Hajiasgharzadeh, Behzad Baradaran
The hepatic vagus branches innervate the liver and serve an important role in liver-brain connection. It appears that brain modulates inflammatory responses by activation of vagal efferent fibers. This activation and subsequent acetylcholine releases from vagus nerve terminals leads to inhibition of inflammatory cytokines through α7 nicotinic acetylcholine receptors (α7nAChRs) which located on the surface of different cell types such as liver Kupffer cells. This protective role of vagus-α7nAChR axis in liver diseases has been shown in several experimental studies...
December 2017: Advanced Pharmaceutical Bulletin
https://www.readbyqxmd.com/read/29363272/microbiota-in-obesity-interactions-with-enteroendocrine-immune-and-central-nervous-systems
#19
REVIEW
R J Mulders, K C G de Git, E Schéle, S L Dickson, Y Sanz, R A H Adan
Western diets, with high consumption of simple sugars and saturated fats, contribute to the rise in the prevalence of obesity. It now seems clear that high-fat diets cause obesity, at least in part, by modifying the composition and function of the microorganisms that colonize in the gastrointestinal tract, the microbiota. The exact pathways by which intestinal microbiota contribute to obesity remain largely unknown. High-fat diet-induced alterations in intestinal microbiota have been suggested to increase energy extraction, intestinal permeability and systemic inflammation while decreasing the capability to generate obesity-suppressing short-chain fatty acids...
April 2018: Obesity Reviews: An Official Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/29361441/neurophysiologic-effects-of-transcutaneous-auricular-vagus-nerve-stimulation-tavns-via-electrical-stimulation-of-the-tragus-a-concurrent-tavns-fmri-study-and-review
#20
Bashar W Badran, Logan T Dowdle, Oliver J Mithoefer, Nicholas T LaBate, James Coatsworth, Joshua C Brown, William H DeVries, Christopher W Austelle, Lisa M McTeague, Mark S George
BACKGROUND: Electrical stimulation of the auricular branch of the vagus nerve (ABVN) via transcutaneous auricular vagus nerve stimulation (taVNS) may influence afferent vagal networks. There have been 5 prior taVNS/fMRI studies, with inconsistent findings due to variability in stimulation targets and parameters. OBJECTIVE: We developed a taVNS/fMRI system to enable concurrent electrical stimulation and fMRI acquisition to compare the effects of taVNS in relation to control stimulation...
December 29, 2017: Brain Stimulation
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