Molecular Nutrition

Ruminal Absorption Mechanism of Volatile Fatty Acids in Ruminants

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  • 1. College of Animal Sciences, Inner Mongolia Agricultural University, Hohhot 010018, China;
    2. Institute of Animal Nutrition and Feed, Inner Mongolia Academy of Agriculture and Animal Husbandry Sciences, Hohhot 010031, China

Received date: 2017-12-11

  Online published: 2018-06-20

Abstract

Volatile fatty acids (VFAs) produced by ruminal fermentation of dietary carbohydrates are translocated through the following pathways in ruminants:passive diffusion in rumen epithelium, acid radical ion of VFAs (VFA-)/HCO3- anion exchange, nitrate-sensitive VFAs absorption, proton-coupled VFA- transport and electron mediating mechanisms. At the same time, VFAs stimulate the rumen epithelium adaptive changes to promote rumen papillae growth and increase gene expressions associated with rumen epithelial VFA absorption. This article summarized the mechanism of VFA absorption and transport through the ruminal epithelium, and the gene expressions related to rumen epithelial VFA absorption, aiming to provide a theoretical basis for further investigation on nutritional regulation of rumen.

Cite this article

LI Yang, GAO Min, HU Honglian, SUN Yanyong . Ruminal Absorption Mechanism of Volatile Fatty Acids in Ruminants[J]. Chinese Journal of Animal Nutrition, 2018 , 30(6) : 2070 -2078 . DOI: 10.3969/j.issn.1006-267x.2018.06.008

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