Misfit Toy
Senior Member
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@JPV -I ate a whole apple pie in two days this past weekend...so I guess I do have a problem with sugar!!
It was the best pie....ever.
It was the best pie....ever.
I certainly think the two are related; the immune system is heavily regulated by the microbiome. Here it's shown that butyrate, a SCFA produced by gut bacteria, inhibits mast cell activation through enhancing histone acetylation. Note that valproic acid (dekapote) is likewise a HDAC inhibitor.So, after reviewing this....do you all really believe mast cell activation syndrome is due to gut problems because I don't?
Microbial Metabolite Butyrate Suppresses Murine Mast Cell Activation
Abstract
- 1School of Food Science Washington State University Pullman WA United States
- 2Dept of Animal Science Washington State University Pullman WA United States
- 3School of Food Science University of Idaho Moscow ID United States
Background: Mast cell is known for its roles in mediating food allergy and regulating gut inflammation. Butyrate, a major short chain fatty acid produced by gut microbiota, exerts beneficial effects on intestinal homeostasis. However, its role in modulating mast cell function remain undefined. Methods: Murine mastocytoma P815 cells (P815) or murine bone marrow derived mast cells (BMMC) were treated with sodium butyrate (NaB). The proliferation, cell cycle, apoptosis, degranulation and cytokine secretion were assessed.Results: In P815 cells, NaB inhibited cell proliferation, increased acetylation of both histone 3 and α-tubulin. The growth inhibition effect of NaB is probably through reducing c-kit expression and inducing cell cycle arrest and apoptosis, which is indicated by enhanced annexin V/PI staining, caspase-3 and PARP cleavage. In BMMC, NaB treatment dramatically suppressed FcεRI dependent TNFα and IL-6 release without affecting degranulation. Furthermore, NaB enhanced histone 3 acetylation but diminished mRNA expression of Tnf -α and Il-6, possibly through inhibiting the transcription initiation as revealed by reduced RNA polymerase II binding to the promoters of Tnf-α and Il-6.Conclusions: NaB modulates murine mast cell function possibly through enhancing histone acetylation, which is of importance in developing therapeutics for diseases involving mast cells (NIH R15HD073864).
n-Butyrate inhibits Jun NH(2)-terminal kinase activation and cytokine transcription in mast cells.
Diakos C1, Prieschl EE, Säemann MD, Böhmig GA, Csonga R, Sobanov Y, Baumruker T, Zlabinger GJ.
Abstract
Mast cells are well known to contribute to type I allergic conditions but only recently have been brought in association with chronic relapsing/remitting autoimmune diseases such as celiac disease and ulcerative colitis. Since the bacterial metabolite n-butyrate is considered to counteract intestinal inflammation we investigated the effects of this short chain fatty acid on mast cell activation. Using RNAse protection assays and reporter gene technology we show that n-butyrate downregulates TNF-alpha transcription. This correlates with an impaired activation of the Jun NH(2)-terminal kinase (JNK) but not other MAP kinases such as ERK and p38 that are largely unaffected by n-butyrate. As a consequence, we observed a decreased nuclear activity of AP-1 and NF-AT transcription factors. These results indicate that n-butyrate inhibits critical inflammatory mediators in mast cells by relatively selectively targeting the JNK signalling.
Clostridium butyricum is a butyrate producing probiotic, which is what makes it especially interesting. I don't know how much the bifido species matter. Resistant starch is likely important, as it feeds burytare producing species.@adreno so according to the articles (which we know are above my head!) would certain probiotics help stabilize MCAS? I know I have asked this question before but I've gotten lots of different answers which just left me with more confusion! I had though Align and the Bifido probiotics were the best for MCAS but now not sure?
https://en.wikipedia.org/wiki/Histone_deacetylase_inhibitorHistone deacetylase inhibitors (HDAC inhibitors, HDIs) are a class of compounds that interfere with the function of histone deacetylase.
HDIs have a long history of use in psychiatry and neurology as mood stabilizers and anti-epileptics. More recently they are being investigated as possible treatments for cancers,[1][2] parasitic[3] and inflammatory diseases.[4]
According to the study I quoted, HDAC inhibitors limit mast cell activation, so supposedly these compounds are helpful for MCAS.@adreno -I read this. This is for a scientist talking of receptors, etc. I went to art school. This is Greek to me. My question is...what are you trying to tell me? Is Depakote a good or bad thing because I am unsure of what you are trying to convey.
http://www.mastocytosis.ca/MSC Patient Experience April2012.pdf
Justy and ginger may have already read this. This is so on the mark. I don't believe it's the gut.