Contribution of different rumen microbial groups to gas, short‐chain fatty acid and ammonium production from different diets—an approach in an in vitro fermentation system

2018 ◽  
Vol 103 (1) ◽  
pp. 17-28 ◽  
Author(s):  
Mohammad Mobashar ◽  
Jürgen Hummel ◽  
Ralf Blank ◽  
Karl‐Heinz Südekum
Keyword(s):  
Fatty Acid ◽  
Short Chain Fatty Acid ◽  
Chain Fatty Acid ◽  
Short Chain ◽  
In Vitro Fermentation ◽  
Fermentation System ◽  
Ammonium Production ◽  
Microbial Groups

Wheat cell walls and constituent polysaccharides induce similar microbiota profiles upon in vitro fermentation despite different short chain fatty acid end-product levels.

2021 ◽  
Author(s):  
Shiyi Lu ◽  
Deirdre Mikkelsen ◽  
Hong Yao ◽  
Barbara Williams ◽  
Bernadine Flanagan ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Gut Microbiota ◽  
Plant Cell ◽  
Cell Walls ◽  
Short Chain Fatty Acid ◽  
Chain Fatty Acid ◽  
Plant Cell Walls ◽  
Human Gut ◽  
In Vitro Fermentation

Plant cell walls as well as their component polysaccharides in foods can be utilized to alter and maintain a beneficial human gut microbiota, but it is not known whether the...

scholarly journals Short Chain Fatty Acid Production from Mycoprotein and Mycoprotein Fibre in an In Vitro Fermentation Model

Nutrients ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 800 ◽  
Author(s):  
Hannah Harris ◽  
Christine Edwards ◽  
Douglas Morrison
Keyword(s):  
Energy Intake ◽  
Short Chain Fatty Acid ◽  
Short Chain Fatty Acids ◽  
Chain Fatty Acid ◽  
Fibre Content ◽  
Short Chain ◽  
Fatty Acid Production ◽  
In Vitro Fermentation ◽  
Fermentation Model

Dietary mycoprotein (marketed as QuornTM) has many health benefits, including reductions in energy intake. The majority of studies evaluating mycoprotein focus on the protein content and very few consider the fibre content. Fibre consumption is also associated with decreased energy intake, which is partly attributed to short chain fatty acids (SCFAs) from fibre fermentation by colonic bacteria. To study the SCFA-producing capability of mycoprotein, in vitro batch fermentations were conducted, and SCFA production compared with that from extracted mycoprotein fibre, oligofructose (OF), rhamnose, and laminarin. Mycoprotein and mycoprotein fibre were both fermentable, resulting in a total SCFA production of 24.9 (1.7) and 61.2 (15.7) mmol/L, respectively. OF led to a significantly higher proportion of acetate compared to all other substrates tested (92.6 (2.8)%, p < 0.01). Rhamnose generated the highest proportion of propionate (45.3 (2.0)%, p < 0.01), although mycoprotein and mycoprotein fibre yielded a higher proportion of propionate compared with OF and laminarin. Butyrate proportion was the highest with laminarin (28.0 (10.0)although mycoprotein fibre led to a significantly higher proportion than OF (p < 0.01). Mycoprotein is a valuable source of dietary protein, but its fibre content is also of interest. Further evaluation of the potential roles of the fibre content of mycoprotein is required.

Short-chain fatty acid transport and its effects on ion transport by rabbit cecum

1987 ◽  
Vol 253 (2) ◽  
pp. G171-G178
Author(s):  
M. Hatch
Keyword(s):  
Fatty Acid ◽  
Short Chain Fatty Acid ◽  
Short Circuit ◽  
Basolateral Membrane ◽  
Chain Fatty Acid ◽  
Short Chain ◽  
Bathing Solution ◽  
Fatty Acid Transport ◽  
Unexpected Finding

Short-chain fatty acid (SCFA) metabolism and transport were examined in vitro across isolated rabbit cecal epithelia whose primary function is absorption of these solutes. This study shows that although there was some low-level metabolism of SCFAs to ketone bodies by the isolated cecum, a significantly higher oxygen consumption was sustained for a longer time period by tissues incubated in glucose-containing salines. The cecum supported a significant net secretory flux of acetate (J net Ac- = -1.13 +/- 0.13 mu eq X cm-2 X h-1) and propionate (J net Pr- = -0.61 +/- 0.14 mu eq X cm-2 X h-1). This study also shows that glucose significantly enhanced short-circuit current (Isc), tissue conductance (Gt), and sodium transport across this tissue. Neither Ac- nor Pr- enhanced net sodium flux (J net Ac-) but Pr- significantly reduced net chloride flux (J net Cl-), whereas Ac- had no effect. The increase in Isc and Gt observed in the presence of SCFAs was attributable to the presence of SCFA in the serosal bathing solution alone. To explain the latter finding and the unexpected finding of SCFA secretion, the existence of an electrogenic anion (HCO3-) secretory pathway is postulated. It is suggested that this system can accommodate SCFAs in vitro and that it is a Na+-dependent system located on the basolateral membrane of the cecal cell.

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