Johanna07 Posted October 22, 2015 Share Posted October 22, 2015 Diet Affects Progression of Autoimmune Diseases Dietary fatty acids affect the development and progression of autoimmune chronic-inflammatory diseases such as multiple sclerosis. In a collaborative study between the Departments of Neurology at the Ruhr-Universität Bochum (St. Josef-Hospital) and the Friedrich Alexander Universtiy Erlangen, researchers now found that long-chain fatty acids promote the development and propagation of CNS reactive immune cells in the intestinal wall. On the contrary, short-chain fatty acids promote the development and propagation of regulatory cells in the immune system. Aiden Haghikia and Ralf Linker published their results in the current edition of the renowned journal Immunity. Intestinal bacteria play a significant role in health and diseaseThe research focus within the medical community has increasingly centered on the human intestine and its bacterial population, the so-called microbiome, especially in neurological disorders such as multiple sclerosis. Here, cumulative evidence suggests a considerable influence of the intestinal microbiome on disease emergence and progression. The interaction between intestinal contents and the immune system is influenced by different factors. In particular, diet as an integral part of daily life and the most evident environmental factor has drastically changed in industrialized nations. Short-chain fatty acids regulate inflammatory responsesIn the current study, researchers demonstrated in both the cell culture dish and in an experimental model, that long-chain fatty acids, such as lauric acid, promote the development and propagation of inflammatory cells in the intestinal wall. On the contrary, short-chain fatty acids, first and foremost propionic acid (or its salt propionate), lead to the development and propagation of regulatory cells of the immune system in the intestinal wall. These cells have the capacity to regulate excessive inflammatory responses and autoreactive immune cells. Important role for metabolic products of intestinal bacteriaInterestingly enough, the researchers did not observe any effects of dietary fatty acids once the intestine was entirely germ-free. This suggests that the intestinal microbiome is directly involved in the mechanism of fatty acid action. Further experiments showed that it is rather the metabolic products of the microbiome than a single bacterial strain which is holds responsible for the observed effects. New therapy in sightToday, researchers assume that autoimmune diseases like multiple sclerosis are caused by an imbalance between weakened regulatory and pro-inflammatory autoimmune mechanisms. Still, the large majority of approved immunotherapies aims at weakening or blocking pro-inflammatory components of the immune system. By strengthening regulatory pathways, for example by using propionate as a supplement to established drugs, therapies could be further optimized. The researchers from Bochum and Erlangen now plan to employ the gained insights to develop innovative dietary add-on therapies to established immunotherapies in multiple sclerosis. http://www.laboratoryequipment.com/news/2015/10/diet-affects-progression-autoimmune-diseases 2 Quote Link to comment Share on other sites More sharing options...
Zepp Posted October 22, 2015 Share Posted October 22, 2015 Kul med lite ny input.. du får gärna sammanfatta, det vesäntliga! Sen så.. Laurinsyra var ingen lång fettsyra senast jag kollade utan en medellång.. dvs MCT.. som i andra studier visat sig ha bra egenskaper i tarmen iomed att den omvandlas till monolaurin. Är det samma gamla mumbojumbo om att det är colonbakterier som styr vår hälsa? Quote Link to comment Share on other sites More sharing options...
Johanna07 Posted October 22, 2015 Author Share Posted October 22, 2015 Kul med lite ny input.. du får gärna sammanfatta, det vesäntliga! Sen så.. Laurinsyra var ingen lång fettsyra senast jag kollade utan en medellång.. dvs MCT.. som i andra studier visat sig ha bra egenskaper i tarmen iomed att den omvandlas till monolaurin. Är det samma gamla mumbojumbo om att det är colonbakterier som styr vår hälsa? Här är en kort sammanfattning, ska se om jag kan se vilka fettsyror de menar. Dietary fatty acids affect the development and progression of autoimmune chronic-inflammatory diseases such as multiple sclerosis. In a collaborative study, researchers now found that long-chain fatty acids promote the development and propagation of CNS reactive immune cells in the intestinal wall. On the contrary, short-chain fatty acids promote the development and propagation of regulatory cells in the immune system. Lite mer: In the current study, researchers demonstrated in both the cell culture dish and in an experimental model, that long-chain fatty acids, such as lauric acid, promote the development and propagation of inflammatory cells in the intestinal wall. On the contrary, short-chain fatty acids, first and foremost propionic acid (or its salt propionate), lead to the development and propagation of regulatory cells of the immune system in the intestinal wall. These cells have the capacity to regulate excessive inflammatory responses and autoreactive immune cells. Interestingly enough, the researchers did not observe any effects of dietary fatty acids once the intestine was entirely germ-free. This suggests that the intestinal microbiome is directly involved in the mechanism of fatty acid action. Further experiments showed that it is rather the metabolic products of the microbiome than a single bacterial strain which is holds responsible for the observed effects. Så ... microbiome behövs för att aktivera de positiva effekterna från fettsyrorna? Vad är hönan/ägget här? Här är studien: http://www.cell.com/immunity/pdf/S1074-7613(15)00392-1.pdf Sammanfattningen på framsidan av artikeln Highlights Dietary fatty acids have profound influence on T cell differentiation in the gut Middle- and long-chain fatty acids (LCFAs) support Th1 and Th17 cell differentiation Short-chain fatty acids (SCFAs) lead to increased Treg cell differentiation LCFAs worsen disease in an animal model of MS; SCFAs exert the opposite effect Jag antar att vid autoimmuna sjukdomar har man för lite Treg? 1 Quote Link to comment Share on other sites More sharing options...
Johanna07 Posted October 22, 2015 Author Share Posted October 22, 2015 SCFA, finns det mest i animaliskt fett? Eller är det fermenterade grönsaker? Quote Link to comment Share on other sites More sharing options...
Zepp Posted October 22, 2015 Share Posted October 22, 2015 SCFA, finns det mest i animaliskt fett? Eller är det fermenterade grönsaker? Vet inte men antar att de mest finns/bildas i colon.. eller via annan fermentering? Hur som helst så lär det finnas smörsyra (butyrat) i smör och andra mejerier.. acetat är inget annat än vinäger.. eller rättare sagt det bildas i processen som gör vin till vinäger. Propionat är inget annat än surströmmingsspad.. en annan fermenterad produkt! Jag är för det mesta väldigt skeptisk mot de som brukar framhålla olika fermenteringsprodukter i colon som att de styr vår hälsa, däremot så är det inte okänt att de kan bidra till hälsa! Eller rättare sagt.. avsaknaden av dessa fermenterade ämnen kan vara en indikation på dålig tarmhälsa och dålig kost över huvud taget! Det visar sig oftast att det handlar om utslagen flora och fauna i colon.. av diverse skäl.. medikamenter, dålig mat, högprocessad mat utan vare sig vegetabiliska eller animaliska fibrer! Vi har tarmbakterier som har som uppgift att bryta ner både vegetabiliska fibrer eller RS.. men man glömmer ofta att vi har andra som skall bryta ner animaliska oxå! De sistnämnda har jag för mig är de som mest bildar proprionat.. men jag är osäker! Så om det är som jag misstänker så ät mer svål och brosk! 1 Quote Link to comment Share on other sites More sharing options...
Peter B Posted October 22, 2015 Share Posted October 22, 2015 Bara en dum fråga... Är det här det vanliga potatismjöl snacket fast i avancerad form? 1 Quote Link to comment Share on other sites More sharing options...
Johanna07 Posted October 22, 2015 Author Share Posted October 22, 2015 Bara en dum fråga... Är det här det vanliga potatismjöl snacket fast i avancerad form? Jag har bara läst lite svepande, men vad jag kan se säger man inget om hur eller från vad SCFA och LCFA kommer. Utan man bara testar effekten av att tillföra dessa fettsyror, dels på cellodling och på en musmodell av MS. De skriver i artikeln att The gut microbiome, along with various dietary habits such as high salt intake, has been recently established as an environmental contributor to the pathogenesis of multiple sclerosis (MS) (Berer et al., 2011; Kleinewietfeld et al., 2013), a T-cellmediated autoimmune disease of the central nervous system (CNS) with neurodegenerative features (Haghikia et al., 2013). Previous interdisciplinary research has led to the contemporary view that the autoimmune basis of MS stems from an imbalance between pathogenic pro-inflammatory Th1 and/or Th17 cells and anti-inflammatory or regulatory mechanisms of immune cells including Treg cells (Kleinewietfeld and Hafler, 2014). Och enligt dem så påverkar SCFA och LCFA, i kombination med microbiome, immunförsvaret olika. PS. Personligen så tycker jag potatismjölsgrejen är "ointressant". Ät grönsaker istället. Det jag funderar på när jag läser detta är 1) vikten av grönsaker, 2) syrade produkter och 3) kanske animaliska fetter, som späck etc, kan vara av intresse? Lite osäker på vilka fettsyror de innehåller... och man vet fortfarande inte varför ketogena dieter har sån positiv effekt på neurologiska sjukdomar. Lite tankar bara. 1 Quote Link to comment Share on other sites More sharing options...
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