Gene expression analysis of a human enterocyte cell line reveals downregulation of cholesterol biosynthesis in response to short-chain fatty acids

IUBMB Life ◽  
2008 ◽  
Vol 60 (11) ◽  
pp. 757-764 ◽  
Author(s):  
Adriana Alvaro ◽  
Rosa Solà ◽  
Roser Rosales ◽  
Josep Ribalta ◽  
Anna Anguera ◽  
...  

1997 ◽  
Vol 272 (4) ◽  
pp. G705-G712 ◽  
Author(s):  
J. M. Mariadason ◽  
D. H. Barkla ◽  
P. R. Gibson

Control of paracellular permeability in the colonic epithelium is fundamental to its functional competence. This study examines the relationship between physiologically relevant short-chain fatty acids (SCFAs) and paracellular permeability using the Caco-2 cell line model. Butyrate induced a concentration-dependent, reversible increase in transepithelial resistance (TER) that was maximal after 72 h. Butyrate (2 mM) increased TER by 299 +/- 69% (mean +/- SE; n = 5; P < 0.05; t-test) and reduced mannitol flux to 52 +/- 11% (P < 0.05) of control. The effect of butyrate was dependent on protein synthesis and gene transcription but not dependent on its oxidation or activation of adenosine 3',5'-cyclic monophosphate. The other SCFAs, propionate and acetate, also induced a concentration-dependent increase in TER. The effect of butyrate paralleled changes in cellular differentiation, because alkaline phosphatase activity, carcinoembryonic antigen expression, and dome formation were increased. Furthermore, other differentiating agents (dimethyl sulfoxide and retinoic acid) also increased TER. Thus SCFAs reduce paracellular permeability in the Caco-2 cell line, possibly by promotion of a more differentiated phenotype. If such an effect occurs in vivo, it may have ramifications for the biology and pathobiology of colonic mucosa.





2006 ◽  
Vol 1107 (1) ◽  
pp. 13-23 ◽  
Author(s):  
Parul Shah ◽  
Bistra B. Nankova ◽  
Santosh Parab ◽  
Edmund F. La Gamma


2002 ◽  
Vol 46 (5) ◽  
pp. 1451-1464 ◽  
Author(s):  
Sara D. Lawhon ◽  
Russell Maurer ◽  
Mitsu Suyemoto ◽  
Craig Altier


2005 ◽  
Vol 142 (1) ◽  
pp. 28-38 ◽  
Author(s):  
Manuel DeCastro ◽  
Bistra B. Nankova ◽  
Parul Shah ◽  
Pranav Patel ◽  
Pradeep V. Mally ◽  
...  


PLoS ONE ◽  
2016 ◽  
Vol 11 (7) ◽  
pp. e0154102 ◽  
Author(s):  
Lidiia Astakhova ◽  
Mtakai Ngara ◽  
Olga Babich ◽  
Aleksandr Prosekov ◽  
Lyudmila Asyakina ◽  
...  


2021 ◽  
Vol 12 ◽  
Author(s):  
Bénédicte Colnet ◽  
Christian M. K. Sieber ◽  
Fanny Perraudeau ◽  
Marion Leclerc

Dietary fibers impact gut colonic health, through the production of short-chain fatty acids. A low-fiber diet has been linked to lower bacterial diversity, obesity, type 2 diabetes, and promotion of mucosal pathogens. Glycoside hydrolases (GHs) are important enzymes involved in the bacterial catabolism of fiber into short-chain fatty acids. However, the GH involved in glycan breakdown (adhesion, hydrolysis, and fermentation) are organized in polysaccharide utilization loci (PUL) with complex modularity. Our goal was to explore how the capacity of strains, from the Bacteroidetes phylum, to grow on fiber could be predicted from their genome sequences. We designed an in silico pipeline called FiberGrowth and independently validated it for seven different fibers, on 28 genomes from Bacteroidetes-type strains. To do so, we compared the existing GH annotation tools and built PUL models by using published growth and gene expression data. FiberGrowth’s prediction performance in terms of true positive rate (TPR) and false positive rate (FPR) strongly depended on available data and fiber: arabinoxylan (TPR: 0.89 and FPR: 0), inulin (0.95 and 0.33), heparin (0.8 and 0.22) laminarin (0.38 and 0.17), levan (0.3 and 0.06), mucus (0.13 and 0.38), and starch (0.73 and 0.41). Being able to better predict fiber breakdown by bacterial strains would help to understand their impact on human nutrition and health. Assuming further gene expression experiment along with discoveries on structural analysis, we hope computational tools like FiberGrowth will help researchers prioritize and design in vitro experiments.



2021 ◽  
Author(s):  
Valentin Sencio ◽  
Alexandre Gallerand ◽  
Marina Gomes Machado ◽  
Lucie Deruyter ◽  
Séverine Heumel ◽  
...  

Along with respiratory tract disease per se , viral respiratory infections can also cause extrapulmonary complications with a potentially critical impact on health. In the present study, we used an experimental model of influenza A virus (IAV) infection to investigate the nature and outcome of the associated gut disorders. In IAV-infected mice, the signs of intestinal injury and inflammation, altered gene expression, and compromised intestinal barrier functions peaked on day 7 post-infection. As a likely result of bacterial component translocation, gene expression of inflammatory markers was upregulated in the liver. These changes occurred concomitantly with an alteration of the composition of the gut microbiota and with a decreased production of the fermentative, gut microbiota-derived, products short-chain fatty acids (SCFAs). Gut inflammation and barrier dysfunction during influenza were not attributed to reduced food consumption, which caused in part gut dysbiosis. Treatment of IAV-infected mice with SCFAs was associated with an enhancement of intestinal barrier properties, as assessed by a reduction in translocation of dextran and a decrease in inflammatory gene expression in the liver. Lastly, SCFA supplementation during influenza tended to reduce the translocation of the enteric pathogen Salmonella enterica serovar Typhimurium and to enhance the survival of doubly infected animals. Collectively, influenza infection can remotely impair the gut’s barrier properties and trigger secondary enteric infections. The latter phenomenon can be partially countered by SCFA supplementation.



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