The document discusses the gut-brain axis and how traumatic brain injury (TBI) can disrupt it. Specifically:
1) The gut-brain axis involves bidirectional communication between the enteric nervous system and the brain.
2) TBI can cause changes in the gut microbiome and increased intestinal permeability. This dysbiosis may worsen secondary brain injury through inflammation.
3) Potential interventions include restoring the normal gut flora through fecal microbiota transplant and providing proper nutrition to reduce inflammation after TBI. Further research is needed to better understand how TBI impacts the microbiome and gut-brain axis.
Bacterial colonisation of the intestine has a major role in the post-natal development and maturation of the immune and endocrine systems. These processes are key factors underpinning central nervous system (CNS) signaling. Regulation of the microbiota-gut-brain axis is essential for maintaining homeostasis, including that of the CNS. Moreover, there is now expanding evidence for the view that commensal organisms within the gut play a role in early programming and later responsivity of the stress system. Research has focused on how the microbiota communicates with the central nervous system (CNS) and thereby influences brain function. The routes of this communication are not fully elucidated but include neural, humoral, immune and metabolic pathways. This view is underpinned by studies in germ-free animals and in animals exposed to pathogenic bacterial infections, probiotic agents or antibiotic agents which indicate a role for the gut microbiota in the regulation of mood, cognition, pain and obesity. Thus the concept of a microbiota-gut brain axis is emerging which suggests that modulation of the gut microflora may be a tractable strategy for developing novel therapeutics for complex stress-related CNS disorders where there is a huge unmet medical need.
What is gut microbiota? What is the influence of diet on the proper functioning of our gut microbiota? How does the gut-brain axis (GBA) influence the emotional and cognitive centers of the brain? Tune into this webinar to find out more about this timely topic.
Learning Objectives:
List the neurological and physiological connections that enable the bidirectional communication between the gut and the brain
Identify lifestyle, dietary, and microbial influences on the flow and function of signaling molecules along the gut-microbiota-brain axis
Implement dietary regimens that target the gut and gastrointestinal microbiota to improve or maintain optimal physical and mental health
RDNs earn 1.0 CEU
Microbiota and Gut-Brain Axis in HealthSindhBiotech
This lecture is presented by our volunteer Hina Nawaz, she is from Karachi, Pakistan, and she is covering "Microbiota and Gut-Brain Axis in Health"
For video: https://youtu.be/W2hfl5_FaF8
Bacterial colonisation of the intestine has a major role in the post-natal development and maturation of the immune and endocrine systems. These processes are key factors underpinning central nervous system (CNS) signaling. Regulation of the microbiota-gut-brain axis is essential for maintaining homeostasis, including that of the CNS. Moreover, there is now expanding evidence for the view that commensal organisms within the gut play a role in early programming and later responsivity of the stress system. Research has focused on how the microbiota communicates with the central nervous system (CNS) and thereby influences brain function. The routes of this communication are not fully elucidated but include neural, humoral, immune and metabolic pathways. This view is underpinned by studies in germ-free animals and in animals exposed to pathogenic bacterial infections, probiotic agents or antibiotic agents which indicate a role for the gut microbiota in the regulation of mood, cognition, pain and obesity. Thus the concept of a microbiota-gut brain axis is emerging which suggests that modulation of the gut microflora may be a tractable strategy for developing novel therapeutics for complex stress-related CNS disorders where there is a huge unmet medical need.
What is gut microbiota? What is the influence of diet on the proper functioning of our gut microbiota? How does the gut-brain axis (GBA) influence the emotional and cognitive centers of the brain? Tune into this webinar to find out more about this timely topic.
Learning Objectives:
List the neurological and physiological connections that enable the bidirectional communication between the gut and the brain
Identify lifestyle, dietary, and microbial influences on the flow and function of signaling molecules along the gut-microbiota-brain axis
Implement dietary regimens that target the gut and gastrointestinal microbiota to improve or maintain optimal physical and mental health
RDNs earn 1.0 CEU
Microbiota and Gut-Brain Axis in HealthSindhBiotech
This lecture is presented by our volunteer Hina Nawaz, she is from Karachi, Pakistan, and she is covering "Microbiota and Gut-Brain Axis in Health"
For video: https://youtu.be/W2hfl5_FaF8
Why is the gut our second brain? Robert-J M BrummerValio
Robert-J M Brummer MD PhD
Professor of Gastroenterology and Clinical Nutrition, director Nutrition-Gut-Brain Interactions Research Centre
Pro-Vice-Chancellor, Örebro University, Sweden
Helsinki, June 15, 2016
Presentation given at Eva Perry Library about the emerging information on the microbiome. Key highlights include definition of the microbiome, affect of microbiome on health, how to maintain a healthy/balanced microbiome.
The gut-brain axis (GBA) consists of bidirectional communication between the central and the enteric nervous system, linking emotional and cognitive centers of the brain with peripheral intestinal functions. Recent advances in research have described the importance of gut microbiota in influencing these interactions.
Recent research suggests that a variety of lifestyle - especially dietary - changes influencing the integrity of gastrointestinal function may be driving at least some portion of the increased prevalence of illnesses of civilization, including neuropsychiatric problems, such as autism, attention-deficit-hyperactivity disorder, major depression, obsessive-compulsive disorder and Alzheimer disease. One area of interest involves the relationship between the gut's microbiome (as well as the related functional integrity of the gastrointestinal tract) and mental health.
Renée Wilson, Registered Dietitian and PhD Candidate at University of Otago, New Zealand. Presented at the 1st International Symposium on Kiwifruit and Health: http://www.kiwifruitsymposium.org/presentations/diet-microbiota-and-metabolic-health/
This cross-sectional pilot study aims to determine whether or not there are any differences between the gut microbiota of people with normal glucose tolerance, pre-diabetes and type 2 diabetes.
Microbiota: the community of micro-organisms themselves
Microbiome: The genes and genomes of the microbiota, as well as the products of the microbiota and the host environment” [the collective genomes of the micro-organisms in a particular environment. Although the composition of the gut microbiota varies between individuals, the community in each individual is relatively stable over time
Ellen Kamhi, PhD RN, The Natural Nurse, Leaky Gut is also called Compromised Intestinal Permeability, due to loss of integrity of the tight junctions between cells in the intestinal mucosa, and is well documented in the scientific literature. See my document Role of Intestinal Permeability in the Inflammatory Process. This condition should be addressed by all health care providers.
Microbiota, leaky gut syndrome and gut-related diseasesMaurizio Salamone
Lecture on "Microbiota, Leaky gut Syndrome and gut-related disease" at the 7° International workshop on Immunonutrition "Eating for preventing" Carovigno (BA) May 1st-3th 2014
Why is the gut our second brain? Robert-J M BrummerValio
Robert-J M Brummer MD PhD
Professor of Gastroenterology and Clinical Nutrition, director Nutrition-Gut-Brain Interactions Research Centre
Pro-Vice-Chancellor, Örebro University, Sweden
Helsinki, June 15, 2016
Presentation given at Eva Perry Library about the emerging information on the microbiome. Key highlights include definition of the microbiome, affect of microbiome on health, how to maintain a healthy/balanced microbiome.
The gut-brain axis (GBA) consists of bidirectional communication between the central and the enteric nervous system, linking emotional and cognitive centers of the brain with peripheral intestinal functions. Recent advances in research have described the importance of gut microbiota in influencing these interactions.
Recent research suggests that a variety of lifestyle - especially dietary - changes influencing the integrity of gastrointestinal function may be driving at least some portion of the increased prevalence of illnesses of civilization, including neuropsychiatric problems, such as autism, attention-deficit-hyperactivity disorder, major depression, obsessive-compulsive disorder and Alzheimer disease. One area of interest involves the relationship between the gut's microbiome (as well as the related functional integrity of the gastrointestinal tract) and mental health.
Renée Wilson, Registered Dietitian and PhD Candidate at University of Otago, New Zealand. Presented at the 1st International Symposium on Kiwifruit and Health: http://www.kiwifruitsymposium.org/presentations/diet-microbiota-and-metabolic-health/
This cross-sectional pilot study aims to determine whether or not there are any differences between the gut microbiota of people with normal glucose tolerance, pre-diabetes and type 2 diabetes.
Microbiota: the community of micro-organisms themselves
Microbiome: The genes and genomes of the microbiota, as well as the products of the microbiota and the host environment” [the collective genomes of the micro-organisms in a particular environment. Although the composition of the gut microbiota varies between individuals, the community in each individual is relatively stable over time
Ellen Kamhi, PhD RN, The Natural Nurse, Leaky Gut is also called Compromised Intestinal Permeability, due to loss of integrity of the tight junctions between cells in the intestinal mucosa, and is well documented in the scientific literature. See my document Role of Intestinal Permeability in the Inflammatory Process. This condition should be addressed by all health care providers.
Microbiota, leaky gut syndrome and gut-related diseasesMaurizio Salamone
Lecture on "Microbiota, Leaky gut Syndrome and gut-related disease" at the 7° International workshop on Immunonutrition "Eating for preventing" Carovigno (BA) May 1st-3th 2014
Biological diversity, or biodiversity, is the scientific term for the variety and variability of life on Earth. Biodiversity is the key indicator of the health of an ecosystem. Every living thing, including man, is involved in these complex networks of interdependent relationships, which are called ecosystems.
Like all healthy ecosystems, Richness of microbiota species characterizes the GI microbiome in healthy individuals. Conversely, a loss in species diversity is a common finding in several disease states. Microbiota Biodiversity helps us : 1- Combat aggressions from other microorganisms, 2- Maintaining the wholeness of the intestinal mucosa. 3- Plays an important role in the immune system, 4- Performing a barrier effect.5- A healthy and balanced gut microbiota is key to ensuring proper digestive functioning. A gut out of balance means a body out of balance which means illness including Inflammation, Allergies, Infections, Nutrient deficiencies, Weight Gain, Asthma-allergies – Autoimmunity
• Arthritis, Metabolic Bone disease, Skin problems e.g. eczema, rosacia, Mood disorders - Cognitive decline-Alzheimers and Cancer.
the new emerging field of science that is nutrigenomics can deal with the issues of health and improve out health with the simple tools by understanding the risk and the baic genome of a person
From gut dysbiosis to altered brain function and mental illness: mechanisms a...BARRY STANLEY 2 fasd
Abstract
The human body hosts an enormous abundance and diversity of microbes, which perform a range of essential and beneficial functions. Our appreciation of the importance of these microbial communities to many aspects of human physiology has grown dramatically in recent years. We know, for example, that animals raised in a germ-free environment exhibit substantially altered immune and metabolic function, while the disruption of commensal microbiota in humans is associated with the development of a growing number of diseases. Evidence is now emerging that, through interactions with the gut– brain axis, the bidirectional communication system between the central nervous system and the gastrointestinal tract, the gut microbiome can also influence neural development, cognition and behaviour, with recent evidence that changes in behaviour alter gut microbiota composition, while modifications of the microbiome can induce depressive-like behaviours. Although an association between enteropathy and certain psychiatric conditions has long been recognized, it now appears that
gut microbes represent direct mediators of psychopathology. Here, we examine roles of gut microbiome in shaping brain development and neurological function, and the mechanisms by which it can contribute to mental illness. Further, we discuss how the insight provided by this new and exciting field of research can inform care and provide a basis for the design of novel, microbiota-targeted, therapies.
What is health? NUGO International nutrigenomics Conference Wageningen Sept 9...Norwich Research Park
What is health? Can Nutrigenomics allow to quantify metabolic health? (YES)
My very personal conclusions of a wonderful conference (NUGO Week 2011) in Wageningen (The Netherlands) that we organized.
VHIR Seminar led by Joel Doré. Research Director. Institut National de la Recherche Agronomique (INRA). Jouy-en-Josas, France.
Abstract: The human intestinal tract harbours a complex microbial ecosystem which plays a key role in nutrition and health. Interactions between food constituents, microbes and the host organism derive from a long co-evolution that resulted in a mutualistic association.
Current investigations into the human faecal metagenome are delivering an extensive gene repertoire representative of functional potentials of the human intestinal microbiota. The most redundant genomic traits of the human intestinal microbiota are identified and thereby its functional balance. These observation point towards the existence of enterotypes, i.e. microbiota sharing specific traits but yet independent of geographic origin, age, sex etc.. It also shows a unique segregation of the human population into individuals with low versus high gene-counts. In the end, it not only gives an unprecedented view of the intestinal microbiota, but it also significantly expands our ability to look for specificities of the microbiota associated with human diseases and to ultimately validate microbial signatures of prognostic and diagnostic value in immune mediated diseases.
Metagenomics of the human intestinal tract was applied to specifically compare obese versus lean individuals as well as to explore the dynamic changes associated with a severe calory-restricted diet. Microbiota structure differs with body-mass index and a limited set of marker species may be used as diagnostic model with a >85% predictive value. Among obese subjects; the overall phenotypic characteristics are worse in individuals with low gene counts microbiota, including a worse evolution of morphometric parameters over a period of 10 years, a low grade inflammatory context also associated with insulin-resistance, and the worst response to dietary constraints in terms of weight loss or improvement of biological and inflammatory characteristics. Low gene count microbiota is also associated with less favourable conditions in inflammatory bowel disease, such as higher relapse rate in ulcerative colitis patients.
Finally, microbiota transplantation has seen a regain of interest with applications expanding from Clostridium difficile infections to immune mediated and metabolic diseases.
The human intestinal microbiota should hence be regarded as a true organ, amenable to rationally designed modulation for human health.
Summary
Neurodevelopment is a complex process governed by both intrinsic and extrinsic signals. While historically studied by researching the brain, inputs from the periphery impact many neurological conditions. Indeed, emerging data suggests communication between the gut and the brain in anxiety,
depression, cognition and autism spectrum disorder (ASD). The development of a healthy, functional brain depends on key pre- and post-natal events that integrate environmental cues, such as molecular signals from the gut. These cues largely originate from the microbiome, the consortium of symbiotic bacteria that reside within all animals. Research over the past few years reveals that the gut microbiome plays a role in basic neurogenerative processes such as the formation of the blood-brainbarrier, myelination, neurogenesis, and microglia maturation, and also modulates many aspects of animal behavior. Herein, we discuss the biological intersection of neurodevelopment and the microbiome, and explore the hypothesis that gut bacteria are integral contributors to development and function of the nervous system, and the balance between mental health and disease.
Pathophysiology of Chronic Disease and Anti-inflammatory DietBatoul Ghosn
This presentation presents the (Inflammation and the Pathophysiology of Chronic Disease) chapter in the Krause's Book 14th Edition as well as the Anti-inflammatory Diet found in the index of the book.
The gut microbiota plays a pivotal role in maintaining our health, with its balance and diversity being key to overall well-being. Dysbiosis, or disruptions in this delicate ecosystem, can lead to a range of harmful effects on the body, including digestive problems, immune dysfunction, inflammation, and increased risks of various diseases. Recognizing the significance of gut health and adopting practices that promote a balanced microbiota, such as a healthy diet and lifestyle choices, is crucial for optimizing our physical and even mental health.The gut microbiota is a vast and complex collection of microorganisms that profoundly affects human health.The gut microbiota assists in a range of bodily functions, including:
harvesting energy from digested food
protecting against pathogens
regulating immune function
strengthening biochemical barriers of the gut and intestine
Current Paradigms to Explore the Gut Microbiota Linkage to Neurological Disor...Dr Varruchi Sharma
It has been suggested that an intricate communication link exists between the gut microbiota and the brain and its ability to modulate behaviour of an individual governing homeostasis. Metabolic activity of the microbiota is considered to be relatively constant in healthy individuals, despite diff erences in the composition of microbiota. The metabolites produced by gut microbiota and their homeostatic balance is often perturbed as a result of neurological complications. Therefore, it is of paramount importance to explore the link between gut microbiota and brain function and behaviour through neural, endocrine, and immune pathways. This current review focusses on the impact of altered gut microbiota on brain functions and how microbiome modulation by use of probiotics, prebiotics, and synbiotics might prove benefi cial in the prevention and/or treatment of neurological disorders. It is important to carefully understand the complex mechanisms underlying the gut–brain axis so as to use the gut microbiota as a therapeutic intervention strategy for neurological disorders.
Similar to presentation-gut-brain-august-2018.pptx (20)
Acute scrotum is a general term referring to an emergency condition affecting the contents or the wall of the scrotum.
There are a number of conditions that present acutely, predominantly with pain and/or swelling
A careful and detailed history and examination, and in some cases, investigations allow differentiation between these diagnoses. A prompt diagnosis is essential as the patient may require urgent surgical intervention
Testicular torsion refers to twisting of the spermatic cord, causing ischaemia of the testicle.
Testicular torsion results from inadequate fixation of the testis to the tunica vaginalis producing ischemia from reduced arterial inflow and venous outflow obstruction.
The prevalence of testicular torsion in adult patients hospitalized with acute scrotal pain is approximately 25 to 50 percent
Explore natural remedies for syphilis treatment in Singapore. Discover alternative therapies, herbal remedies, and lifestyle changes that may complement conventional treatments. Learn about holistic approaches to managing syphilis symptoms and supporting overall health.
Report Back from SGO 2024: What’s the Latest in Cervical Cancer?bkling
Are you curious about what’s new in cervical cancer research or unsure what the findings mean? Join Dr. Emily Ko, a gynecologic oncologist at Penn Medicine, to learn about the latest updates from the Society of Gynecologic Oncology (SGO) 2024 Annual Meeting on Women’s Cancer. Dr. Ko will discuss what the research presented at the conference means for you and answer your questions about the new developments.
Ozempic: Preoperative Management of Patients on GLP-1 Receptor Agonists Saeid Safari
Preoperative Management of Patients on GLP-1 Receptor Agonists like Ozempic and Semiglutide
ASA GUIDELINE
NYSORA Guideline
2 Case Reports of Gastric Ultrasound
Lung Cancer: Artificial Intelligence, Synergetics, Complex System Analysis, S...Oleg Kshivets
RESULTS: Overall life span (LS) was 2252.1±1742.5 days and cumulative 5-year survival (5YS) reached 73.2%, 10 years – 64.8%, 20 years – 42.5%. 513 LCP lived more than 5 years (LS=3124.6±1525.6 days), 148 LCP – more than 10 years (LS=5054.4±1504.1 days).199 LCP died because of LC (LS=562.7±374.5 days). 5YS of LCP after bi/lobectomies was significantly superior in comparison with LCP after pneumonectomies (78.1% vs.63.7%, P=0.00001 by log-rank test). AT significantly improved 5YS (66.3% vs. 34.8%) (P=0.00000 by log-rank test) only for LCP with N1-2. Cox modeling displayed that 5YS of LCP significantly depended on: phase transition (PT) early-invasive LC in terms of synergetics, PT N0—N12, cell ratio factors (ratio between cancer cells- CC and blood cells subpopulations), G1-3, histology, glucose, AT, blood cell circuit, prothrombin index, heparin tolerance, recalcification time (P=0.000-0.038). Neural networks, genetic algorithm selection and bootstrap simulation revealed relationships between 5YS and PT early-invasive LC (rank=1), PT N0—N12 (rank=2), thrombocytes/CC (3), erythrocytes/CC (4), eosinophils/CC (5), healthy cells/CC (6), lymphocytes/CC (7), segmented neutrophils/CC (8), stick neutrophils/CC (9), monocytes/CC (10); leucocytes/CC (11). Correct prediction of 5YS was 100% by neural networks computing (area under ROC curve=1.0; error=0.0).
CONCLUSIONS: 5YS of LCP after radical procedures significantly depended on: 1) PT early-invasive cancer; 2) PT N0--N12; 3) cell ratio factors; 4) blood cell circuit; 5) biochemical factors; 6) hemostasis system; 7) AT; 8) LC characteristics; 9) LC cell dynamics; 10) surgery type: lobectomy/pneumonectomy; 11) anthropometric data. Optimal diagnosis and treatment strategies for LC are: 1) screening and early detection of LC; 2) availability of experienced thoracic surgeons because of complexity of radical procedures; 3) aggressive en block surgery and adequate lymph node dissection for completeness; 4) precise prediction; 5) adjuvant chemoimmunoradiotherapy for LCP with unfavorable prognosis.
Ethanol (CH3CH2OH), or beverage alcohol, is a two-carbon alcohol
that is rapidly distributed in the body and brain. Ethanol alters many
neurochemical systems and has rewarding and addictive properties. It
is the oldest recreational drug and likely contributes to more morbidity,
mortality, and public health costs than all illicit drugs combined. The
5th edition of the Diagnostic and Statistical Manual of Mental Disorders
(DSM-5) integrates alcohol abuse and alcohol dependence into a single
disorder called alcohol use disorder (AUD), with mild, moderate,
and severe subclassifications (American Psychiatric Association, 2013).
In the DSM-5, all types of substance abuse and dependence have been
combined into a single substance use disorder (SUD) on a continuum
from mild to severe. A diagnosis of AUD requires that at least two of
the 11 DSM-5 behaviors be present within a 12-month period (mild
AUD: 2–3 criteria; moderate AUD: 4–5 criteria; severe AUD: 6–11 criteria).
The four main behavioral effects of AUD are impaired control over
drinking, negative social consequences, risky use, and altered physiological
effects (tolerance, withdrawal). This chapter presents an overview
of the prevalence and harmful consequences of AUD in the U.S.,
the systemic nature of the disease, neurocircuitry and stages of AUD,
comorbidities, fetal alcohol spectrum disorders, genetic risk factors, and
pharmacotherapies for AUD.
Couples presenting to the infertility clinic- Do they really have infertility...Sujoy Dasgupta
Dr Sujoy Dasgupta presented the study on "Couples presenting to the infertility clinic- Do they really have infertility? – The unexplored stories of non-consummation" in the 13th Congress of the Asia Pacific Initiative on Reproduction (ASPIRE 2024) at Manila on 24 May, 2024.
New Directions in Targeted Therapeutic Approaches for Older Adults With Mantl...i3 Health
i3 Health is pleased to make the speaker slides from this activity available for use as a non-accredited self-study or teaching resource.
This slide deck presented by Dr. Kami Maddocks, Professor-Clinical in the Division of Hematology and
Associate Division Director for Ambulatory Operations
The Ohio State University Comprehensive Cancer Center, will provide insight into new directions in targeted therapeutic approaches for older adults with mantle cell lymphoma.
STATEMENT OF NEED
Mantle cell lymphoma (MCL) is a rare, aggressive B-cell non-Hodgkin lymphoma (NHL) accounting for 5% to 7% of all lymphomas. Its prognosis ranges from indolent disease that does not require treatment for years to very aggressive disease, which is associated with poor survival (Silkenstedt et al, 2021). Typically, MCL is diagnosed at advanced stage and in older patients who cannot tolerate intensive therapy (NCCN, 2022). Although recent advances have slightly increased remission rates, recurrence and relapse remain very common, leading to a median overall survival between 3 and 6 years (LLS, 2021). Though there are several effective options, progress is still needed towards establishing an accepted frontline approach for MCL (Castellino et al, 2022). Treatment selection and management of MCL are complicated by the heterogeneity of prognosis, advanced age and comorbidities of patients, and lack of an established standard approach for treatment, making it vital that clinicians be familiar with the latest research and advances in this area. In this activity chaired by Michael Wang, MD, Professor in the Department of Lymphoma & Myeloma at MD Anderson Cancer Center, expert faculty will discuss prognostic factors informing treatment, the promising results of recent trials in new therapeutic approaches, and the implications of treatment resistance in therapeutic selection for MCL.
Target Audience
Hematology/oncology fellows, attending faculty, and other health care professionals involved in the treatment of patients with mantle cell lymphoma (MCL).
Learning Objectives
1.) Identify clinical and biological prognostic factors that can guide treatment decision making for older adults with MCL
2.) Evaluate emerging data on targeted therapeutic approaches for treatment-naive and relapsed/refractory MCL and their applicability to older adults
3.) Assess mechanisms of resistance to targeted therapies for MCL and their implications for treatment selection
Title: Sense of Taste
Presenter: Dr. Faiza, Assistant Professor of Physiology
Qualifications:
MBBS (Best Graduate, AIMC Lahore)
FCPS Physiology
ICMT, CHPE, DHPE (STMU)
MPH (GC University, Faisalabad)
MBA (Virtual University of Pakistan)
Learning Objectives:
Describe the structure and function of taste buds.
Describe the relationship between the taste threshold and taste index of common substances.
Explain the chemical basis and signal transduction of taste perception for each type of primary taste sensation.
Recognize different abnormalities of taste perception and their causes.
Key Topics:
Significance of Taste Sensation:
Differentiation between pleasant and harmful food
Influence on behavior
Selection of food based on metabolic needs
Receptors of Taste:
Taste buds on the tongue
Influence of sense of smell, texture of food, and pain stimulation (e.g., by pepper)
Primary and Secondary Taste Sensations:
Primary taste sensations: Sweet, Sour, Salty, Bitter, Umami
Chemical basis and signal transduction mechanisms for each taste
Taste Threshold and Index:
Taste threshold values for Sweet (sucrose), Salty (NaCl), Sour (HCl), and Bitter (Quinine)
Taste index relationship: Inversely proportional to taste threshold
Taste Blindness:
Inability to taste certain substances, particularly thiourea compounds
Example: Phenylthiocarbamide
Structure and Function of Taste Buds:
Composition: Epithelial cells, Sustentacular/Supporting cells, Taste cells, Basal cells
Features: Taste pores, Taste hairs/microvilli, and Taste nerve fibers
Location of Taste Buds:
Found in papillae of the tongue (Fungiform, Circumvallate, Foliate)
Also present on the palate, tonsillar pillars, epiglottis, and proximal esophagus
Mechanism of Taste Stimulation:
Interaction of taste substances with receptors on microvilli
Signal transduction pathways for Umami, Sweet, Bitter, Sour, and Salty tastes
Taste Sensitivity and Adaptation:
Decrease in sensitivity with age
Rapid adaptation of taste sensation
Role of Saliva in Taste:
Dissolution of tastants to reach receptors
Washing away the stimulus
Taste Preferences and Aversions:
Mechanisms behind taste preference and aversion
Influence of receptors and neural pathways
Impact of Sensory Nerve Damage:
Degeneration of taste buds if the sensory nerve fiber is cut
Abnormalities of Taste Detection:
Conditions: Ageusia, Hypogeusia, Dysgeusia (parageusia)
Causes: Nerve damage, neurological disorders, infections, poor oral hygiene, adverse drug effects, deficiencies, aging, tobacco use, altered neurotransmitter levels
Neurotransmitters and Taste Threshold:
Effects of serotonin (5-HT) and norepinephrine (NE) on taste sensitivity
Supertasters:
25% of the population with heightened sensitivity to taste, especially bitterness
Increased number of fungiform papillae
Recomendações da OMS sobre cuidados maternos e neonatais para uma experiência pós-natal positiva.
Em consonância com os ODS – Objetivos do Desenvolvimento Sustentável e a Estratégia Global para a Saúde das Mulheres, Crianças e Adolescentes, e aplicando uma abordagem baseada nos direitos humanos, os esforços de cuidados pós-natais devem expandir-se para além da cobertura e da simples sobrevivência, de modo a incluir cuidados de qualidade.
Estas diretrizes visam melhorar a qualidade dos cuidados pós-natais essenciais e de rotina prestados às mulheres e aos recém-nascidos, com o objetivo final de melhorar a saúde e o bem-estar materno e neonatal.
Uma “experiência pós-natal positiva” é um resultado importante para todas as mulheres que dão à luz e para os seus recém-nascidos, estabelecendo as bases para a melhoria da saúde e do bem-estar a curto e longo prazo. Uma experiência pós-natal positiva é definida como aquela em que as mulheres, pessoas que gestam, os recém-nascidos, os casais, os pais, os cuidadores e as famílias recebem informação consistente, garantia e apoio de profissionais de saúde motivados; e onde um sistema de saúde flexível e com recursos reconheça as necessidades das mulheres e dos bebês e respeite o seu contexto cultural.
Estas diretrizes consolidadas apresentam algumas recomendações novas e já bem fundamentadas sobre cuidados pós-natais de rotina para mulheres e neonatos que recebem cuidados no pós-parto em unidades de saúde ou na comunidade, independentemente dos recursos disponíveis.
É fornecido um conjunto abrangente de recomendações para cuidados durante o período puerperal, com ênfase nos cuidados essenciais que todas as mulheres e recém-nascidos devem receber, e com a devida atenção à qualidade dos cuidados; isto é, a entrega e a experiência do cuidado recebido. Estas diretrizes atualizam e ampliam as recomendações da OMS de 2014 sobre cuidados pós-natais da mãe e do recém-nascido e complementam as atuais diretrizes da OMS sobre a gestão de complicações pós-natais.
O estabelecimento da amamentação e o manejo das principais intercorrências é contemplada.
Recomendamos muito.
Vamos discutir essas recomendações no nosso curso de pós-graduação em Aleitamento no Instituto Ciclos.
Esta publicação só está disponível em inglês até o momento.
Prof. Marcus Renato de Carvalho
www.agostodourado.com
2. Gut-brain connections
Enteric nervous system
Who lives there
Communication with the brain
Intestinal permeability
Implication in neurological diseases
Traumatic brain injury and changes in the brain gut axis
3. Enteric Nervous Systems
The enteric nervous system (ENS) is the largest component of the autonomic
nervous system and is uniquely equipped with intrinsic microcircuits that enable it
to orchestrate gastrointestinal function independently of central nervous system
(CNS) input.
4. Who and what is in the gut
Microbiota in the gut weigh 1-2kg (similar to weight of adult human brain)
Microbiome consists of genetic material of bacteria, viruses, fungi, archae inhabiting
the gut. Estimated 100 trillion organisms. Co-exists with gut pathogens.
Regulates the immune and endocrine system. Stress and sleep deprivation are known
to increase cortisol which causes overgrowth of bad bacteria. 1
70% serotonin produced in the gut by the microbiome (Candida, Streptococcus,
Escherichia, Enterococcus)
GABA, Dopamine, Acetylcholine and Noradrenaline are all made by gut bacteria
1. Dinan et al. Psychoneuroendocrinology 2012
5. The gut microbiome
The gut microbiome serves numerous functions in the human body and is so
crucial to our survival that it has been dubbed “our forgotten organ.”
Some of the roles it serves include:
digestion of polysaccharides,
development of the immune system,
defence against infections,
regulation of angiogenesis, and
production of essential proteins that our genes do not encode
D’Argenio, V.; Salvatore, F. The role of the gut microbiome in the healthy adult status. Clin. Chim. Acta 2015, 451, 97–102.
6. The microbiota-gut-brain axis: neurobehavioral correlates, health and sociality.
Montiel-Castro AJ, et al. Front Integr Neurosci (2013)
Bidirectional gut brain flow (efferent, afferent)
7. Intestinal Permeability (leaky gut)
Gut injury: Gluten, Glyphosate (RoundUp), Lipopolysaccharides, medications
(antibiotics, NSAIDs), stress
Zonulin released, tight junctions open
Systemic release of zonulin opens multiple tight junctions:
Gut
Blood brain barrier
Vascular system
Kidney tubules
8. Consequences of intestinal permeability
Diseases associated with Tight Junction Permeability:
Type 1 Diabetes
Multiple Sclerosis
Rheumatoid arthritis
Can also be associated with development of:
Cancer
Allergies
Infections
Fasano A Zonulin and Its Regulation of Intestinal Barrier Function: The Biological Door to Inflammation,
Autoimmunity, and Cancer Physiology 2011;91:151-175
10. Brain-Gut axis and neurologic injury
The brain-gut axis (BGA), also referred to as the gut-brain axis, is a communication
network that links together the CNS and the enteric nervous system (ENS) [1]. This axis
functions in a bidirectional manner; thus, each component of the network can
influence the other.
The downstream communication from the brain to the gut involves vagal pathways
that innervate the ENS, which is critical for the function of the GI tract [2].
From a gut-to-brain viewpoint, numerous factors such as gut lipopolysaccharides,
cytokines, neuropeptides, and protein messengers connect the gastrointestinal tract to
the brain [2].
1. Leaphart, C.L.; Tepas, J.J., III. The gut is a motor of organ system dysfunction. Surgery 2007, 141, 563–
569.
2. Shanahan, F. Brain-gut axis and mucosal immunity: A perspective on mucosal psychoneuroimmunology.
Semin. Gastrointest. Dis. 1999, 10, 8–13.
11. Gut influences brain in many ways
The gut microbiome can affect the brain via one of many different pathways:
the neuroanatomical pathway of the gut-brain axis,
the neuroendocrine–hypothalamic–pituitary–adrenal axis,
the gut immune system,
the gut microbiota metabolism system, and
the intestinal mucosal barrier and the blood brain barrier
Wang, H.X.; Wang, Y.P. Gut Microbiota-brain Axis. Chin. Med. J. 2016, 129, 2373–2380.
12. Disturbances of Brain Gut Axis
Disturbances of the BGA are implicated in many neurologic disease processes.
Furthermore, the relatively recent discovery of the significance of the gut
microbiota to the brain-gut axis has led to the re-evaluation of CNS diseases [1].
The gut microbiota likely plays a role in a wide range of neurological conditions,
including autism spectrum disorder, anxiety, depression, chronic pain, stress,
Alzheimer’s disease, and Parkinson’s disease [2]. In fact, intestinal inflammation
and pathology in Parkinson’s disease precedes pathologic changes observed in
the CNS by decades
1. Mayer, E.A et al. Gut microbes and the brain: Paradigm shift in neuroscience. J. Neurosci. 2014, 34, 15490–
15496.
2. Houser, M.C et al. The gut-brain axis: Is intestinal inflammation a silent driver of Parkinson’s disease
pathogenesis? NPJ Parkinsons Dis. 2017, 3, 3.
13. TBI and changes in the gut
Changes seen in the gut as soon as 4 mins post injury
Brain trauma can make colon more permeable. Potential for harmful microbes to
migrate from intestine throughout body causing infection.
Post TBI, people are 12x more likely to die from septicaemia and 2.5x more likely to die
from digestive system issue, c/w those without TBI.
In mouse model, researched how gut dysfunction may worsen brain inflammation after
TBI. Mice with E.coli rodent equivalent infection had worse brain inflammation than
those not infected. Increased hippocampal nerve loss than in mice without infection.
Importance of bidirectional gut brain communication and long term effects of TBI.
Ma E L et al. Bidirectional brain-gut interactions and chronic pathological changes after tbi in mice. Brain Behaviour and
Immunity 2017;66:56.
14. Potential Therapeutic Interventions
Investigation into the BGA in the setting of systemic injury and TBI has identified
several promising targets for intervention.
One possible treatment involves mitigating the gut dysbiosis that results from TBI
by attempting to restore the normal gut microbiota.
Faecal microbiota transplant (FMT) is one method of addressing this problem. FMT
has been used to successfully treat several conditions including Clostridium
difficile infection, irritable bowel syndrome, Crohn’s disease, and ulcerative colitis
Borody, T et al. Faecal microbiota transplantation in gastrointestinal disease: 2015 update and the road ahead. Expert Rev.
Gastroenterol. Hepatol. 2015, 9, 1379–1391
15. Nutrition post TBI
In addition, in 2011, the Institute of Medicine recommended that patients with TBI
should be given a high level of nutrition for two weeks to curtail inflammation [1].
Dietary treatments in the form of early enteral nutrition and intake of glutamine,
arginine, nucleotides, and omega-3 fatty acids are another potential therapy that
stimulates immune cells and promotes gut barrier health [2]. Vitamins and
minerals such as nicotinamide, zinc, and magnesium have also shown potential in
pre-clinical models
1. Institute of Medicine. Nutrition and Traumatic Brain Injury: Improving Acute and Subacute Health Outcomes in
Military Personnel; Erdman, J., Oria, M., Pillsbury, L., Eds.; The National Academies Press: Washington, DC, USA,
2011.
2. Todd,S.R.;Gonzalez,E.A.;Turner,K.;Kozar,R.A.Updateonpostinjurynutrition.Curr.Opin.Crit.Care 2008, 14, 690–695.
16. Conclusion
Through disruption of the brain gut axis and the intimate involvement of the GI
microbiota, TBI may initiate a feedback loop that potentiates a neuroinflammatory
cascade and leads to secondary brain injury. TBI-induced dysbiosis, through its
impact on the BGA, may potentiate secondary injury and influence functional
outcome.
There is limited clinical data specifically regarding the effects of TBI on the
microbiome and how the microbiome may then feed into that axis and further
affect outcome.
Further research into the gut microbiome in the setting of TBI holds the exciting
potential to influence treatment of brain-injured patients and enhance quality-of-
life for patients with TBI.
