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Abstract Title:

Biochanin A Inhibits Ruminal Nitrogen-Metabolizing Bacteria and Alleviates the Decomposition of Amino Acids and Urea In Vitro.

Abstract Source:

Animals (Basel). 2020 Feb 25 ;10(3). Epub 2020 Feb 25. PMID: 32106487

Abstract Author(s):

Sijia Liu, Zhenyu Zhang, Samson Hailemariam, Nan Zheng, Min Wang, Shengguo Zhao, Jiaqi Wang

Article Affiliation:

Sijia Liu

Abstract:

Biochanin A is a naturally occurring flavonoid compound that is found in plant species such as red clover () and alfalfa (). Flavonoids have been reported to regulate ruminal fermentation, and the objective of this study was to evaluate the effects of biochanin A on ruminal microbial composition and nitrogen metabolism. The experiment was performed by in vitro batch culturing of a control (without biochanin A) and a biochanin A treatment. Following a 24-h incubation, gas production and the amounts of ammonia-nitrogen (NH-N), volatile fatty acid (VFA), and amino acids were measured. Microbial population using 16S rRNA gene sequence. We found that the addition of biochanin A significantly increased microbial gas production; but had no effect on VFA production. Biochanin A supplementation also resulted in reduced microbial urease activity with half the maximal inhibitory concentration of 320 nM and also inhibited the degradation rates of total amino acids, valine, lysine, methionine and leucine by 18%, 56%, 37%, 13%, and 12%, respectively. This inhibition of urease activity and amino acid decomposition resulted in a significant reduction in the NH-N concentration. High-throughput sequencing of the 16S rRNA sequence to monitor microbial composition showed that biochanin A significantly reduced the abundance of the proteolytic bacteriaand ureolytic bacteria, but increased the abundance of the lactic acid metabolizing bacteriaand. In conclusion, biochanin A reduced the production of ammonia by inhibiting proteolytic bacteria and their decomposition of urea and amino acids.

Study Type : In Vitro Study

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