Abstract
To investigate the effect of sodium butyrate on high-concentrate diet-induced local inflammation of the rumen epithelium, 18 midlactating dairy goats were randomly assigned to 3 groups: a low-concentrate diet group as the control (concentrate:forage = 4:6), a high-concentrate (HC) diet group (concentrate:forage = 6:4), and a sodium butyrate (SB) group (concentrate:forage = 6:4, with 1% SB by weight). The results showed that, with the addition of sodium butyrate, the concentration of lipopolysaccharide (LPS) in rumen fluid (2.62 × 104 ± 2.90 × 103 EU/mL) was significantly lower than that in the HC group (4.03 × 104 ± 2.77 × 103 EU/mL). The protein abundance of pp65, gene expression of proinflammatory cytokines, and activity of myeloperoxidase (MPO) and matrix metalloproteinase (MMP)-2,9 in the rumen epithelium were significantly down-regulated by SB compared with those in the HC group. With sodium butyrate administration, the concentration of NH3-N (19.2 ± 0.890 mM) in the rumen fluid was significantly higher than that for the HC group (12.7 ± 1.38 mM). Severe disruption of the rumen epithelium induced by HC was also ameliorated by dietary SB. Therefore, local inflammation and disruption of the rumen epithelium induced by HC were alleviated with SB administration.
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