scholarly journals Immunomodulatory potential of gut microbiome-derived short-chain fatty acids (SCFAs)

2019 ◽  
Author(s):  
Weronika Ratajczak ◽  
Aleksandra Rył ◽  
Arnold Mizerski ◽  
Kinga Walczakiewicz ◽  
Olimpia Sipak ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Immune System ◽  
Intestinal Microbiota ◽  
Immune Cells ◽  
Short Chain Fatty Acids ◽  
Short Chain ◽  
Intestinal Microbiome ◽  
16S Rrna Analysis ◽  
Immunomodulatory Potential ◽  
Chain Fatty Acids

Intestinal microbiota is an element of the bacterial ecosystem in all mammalian organisms. These microorganisms play a very important part in the development, functioning, and modulation of the immune system from the moment of birth. In recent years, owing to the use of modern sequencing techniques, the microbiome composition in healthy people has been identified based on bacterial 16S rRNA analysis. Currently, more and more attention is being given to the influence of microorganisms on the host’s cellular metabolism. Analysis of microbial metabolites, among them short-chain fatty acids (SCFAs), and disruption of intestinal microbiota homeostasis in terms of their effects on molecular regulatory mechanisms of immune reactions will surely improve the understanding of the etiology of many common diseases. SCFAs, mainly butyrate, propionate, and acetate, occur in specific amounts, and their proportions can change, depending on the diet, age and diseases. The levels of SCFAs are substantially influenced by the ratio of commensal intestinal bacteria, the disturbance of which (dysbiosis) can lead to a disproportion between the SCFAs produced. SCFAs are regarded as mediators in the communication between the intestinal microbiome and the immune system. The signal they produce is transferred, among others, in immune cells via free fatty acid receptors (FFARs), which belong to the family of G protein-coupled receptors (GPCRs). It has been also confirmed that SCFAs inhibit the activity of histone deacetylase (HDAC) – an enzyme involved in post-translational modifications, namely the process of deacetylation and, what is new, the process of histone crotonylation. These properties of SCFAs have an effect on their immunomodulatory potential i.e. maintaining the anti/pro-inflammatory balance. SCFAs act not only locally in the intestines colonized by commensal bacteria, but also influence the intestinal immune cells, and modulate immune response by multi-protein inflammasome complexes. SCFAs have been confirmed to contribute to the maintenance of the immune homeostasis of the urinary system (kidneys), respiratory system (lungs), central nervous system, and the sight organ.

scholarly journals Evaluation of intestinal microbiota, short-chain fatty acids, and immunoglobulin a in diversion colitis

2021 ◽  
Vol 25 ◽  
pp. 100892
Author(s):  
Kentaro Tominaga ◽  
Atsunori Tsuchiya ◽  
Takeshi Mizusawa ◽  
Asami Matsumoto ◽  
Ayaka Minemura ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Intestinal Microbiota ◽  
Immunoglobulin A ◽  
Short Chain Fatty Acids ◽  
Short Chain ◽  
Diversion Colitis ◽  
Chain Fatty Acids

scholarly journals Short-Chain Fatty Acids

2020 ◽  
Author(s):  
Paulina Markowiak-Kopeć ◽  
Katarzyna Śliżewska
Keyword(s):  
Fatty Acids ◽  
Volatile Fatty Acids ◽  
Short Chain Fatty Acids ◽  
Short Chain ◽  
Intestinal Microbiome ◽  
Test Results ◽  
And Function ◽  
The Relationship ◽  
Normal Health ◽  
Chain Fatty Acids

The relationship between diet and the diversity and function of the intestinal microbiomeand its importance for human health is currently the subject of many studies. The type and proportionof microorganisms found in the intestines can determine the energy balance of the host. Intestinalmicroorganisms perform many important functions, one of which is participation in metabolicprocesses, e.g., in the production of short-chain fatty acids—SCFAs (also called volatile fatty acids).These acids represent the main carbon flow from the diet to the host microbiome. Maintainingintestinal balance is necessary to maintain the host’s normal health and prevent many diseases.The results of many studies confirm the beneficial effect of probiotic microorganisms on the balanceof the intestinal microbiome and produced metabolites, including SCFAs. The aim of this review is tosummarize what is known on the effects of probiotics on the production of short-chain fatty acidsby gut microbes. In addition, the mechanism of formation and properties of these metabolites isdiscussed and verified test results confirming the effectiveness of probiotics in human nutrition bymodulating SCFAs production by intestinal microbiome is presented.

scholarly journals Short-chain fatty acids: nutritional strategies to modulate intestinal microbiota

2021 ◽  
Vol 11 (5) ◽  
pp. 141-144
Author(s):  
Marcos Porto Arrais de Souza ◽  
Morgana Andrade Freitas ◽  
Carla Braga Campelo de Oliveira ◽  
Lorena Almeida Brito ◽  
Julio Cesar Chaves Nunes Filho ◽  
...  
Keyword(s):  
Fatty Acids ◽  
Gastrointestinal Tract ◽  
Intestinal Microbiota ◽  
Short Chain Fatty Acids ◽  
Short Chain ◽  
Soluble Fiber ◽  
Fatty Acid Production ◽  
Pubmed Database ◽  
Nutritional Strategies ◽  
Chain Fatty Acids

Introduction: The intestinal microbiota has been the subject of research due to its association in physiological and pathological conditions. The production of short chain fatty acids obtained by fermentation of the intestinal microbiota has shown important effects on the gastrointestinal tract, adipose tissue, immune system and nervous system. Objective: This literature review aims to present different nutritional strategies with the potential to modulate the intestinal microbiota by increasing the production of short chain fatty acids. Methods: The research was considered a review work, through a bibliographic survey carried out from the collection of articles in English, published in the PubMed database, in the period from 2013 to 2020. The articles were selected from the descriptors: gut microbiota, soluble fiber, resistent starch, pectin, dietary fiber, short chain fatty acids (SCFA) with the combinations of the Boolean operators “and” and “or”. Studies considered as gray literature were excluded, as well as studies in which the titles were not related to the theme of the proposed research. Results: There are many benefits to consuming foods that may favor the increase of short chain fatty acids. This increase in the gastrointestinal tract is of fundamental importance for the maintenance of intestinal microbiota and prevention of diseases. Some nutritional strategies can be used in clinical therapy, such as increased consumption of fruits, vegetables and whole grains that are plant foods and important sources of fiber. The type of food must be observed, since each one can contain fibers of diverse types. Soluble fiber is the basis for the metabolization of short chain fatty acids and is found in various foods that can be inserted into the food plan, such as: bananas, apples, oats, barley, cooked and cooled potatoes, partially ground seeds, corn, morning cereal, agave, artichoke, asparagus, chicory root, garlic, onion, leeks and wheat. Conclusion: Scientific evidence of the relationship between nutrition, intestinal microbiota and short-chain fatty acid production demonstrates the importance of implementing simple nutritional strategies by health professionals, which can contribute to the modulation of the intestinal microbiota and the development of new perspectives in the development of therapies for prevention and treatment of diseases.

scholarly journals Kidneys and microbiota

2019 ◽  
pp. 48-57
Author(s):  
Zh. Semydotska ◽  
I. Chernyakova ◽  
O. Avdeyeva
Keyword(s):  
Chronic Kidney Disease ◽  
Fatty Acids ◽  
Kidney Disease ◽  
Intestinal Microbiota ◽  
General Circulation ◽  
Short Chain Fatty Acids ◽  
Uremic Toxins ◽  
Short Chain ◽  
Intestinal Lumen ◽  
Chain Fatty Acids

 The review article analyzes the results of studies of the bi-directional relationship of the intestinal microbiota and kidneys, the so-called colorenal interactive axis of interaction.  The intestinal microbiota is considered as a kind of organ that influences the brain, cardiovascular and immune systems, as well as the kidneys of the "host".  Short-chain fatty acids (SCFA) formed in the colon as the result of microbial metabolism from plant components of dietary fiber and acting as ligands for the olfactory receptor, paired G-proteins in the kidneys are recognized as the markers of this symbiosis.  With the help of modern omix technologies, the development of dysbiosis taking into account patients with chronic kidney disease (CKD) has been proved, which leads to the accumulation of precursors of uremic toxins, a decrease in the production of SCFA, which have nephroprotective properties and play a key role in energy homeostasis.  Changes in the composition of the intestinal microbiota in CKD, an increase in the content of uremic toxins in the intestinal lumen contribute to the appearance of the “leaky” intestinal barrier syndrome, the movement of bacteria from the intestine into the general circulation, the development of systemic inflammation, oxidative stress, comorbidity, the progression of CKD, and an increase in mortality. Diets with restriction of protein and potassium quotas, violation of nutritional status lead to the development of dysbiosis in CKD.  A decrease in the diet of vegetables and fruit causes the expansion of bacteria producing uricase and urease, which are enzymes in the formation of uremic toxins and reduce the number and variety of bacteria producing short-chain fatty acids.  Potential targeted effects on the axis of “intestinal microbiota - chronic kidney disease” are being discussed: the use of a diet enriched in plant fibers, heat-treated, then chilled potatoes and rice as prebiotics (sources of resistant starch), nuts, plant seeds, and pro-, pre-, synbiotics, fecal transplantation.  Most of the proposed interventions in the structure and functions of the microbiota are not dangerous, side effects are minimal.

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