Modulatory effects of dietary tannins on polyunsaturated fatty acid biohydrogenation in the rumen: a meta-analysis

Makmur, Malik and Zain, Mardiati and Sholikin, M. M. and Suharlina and Jayanegara, Anuraga

Special Issue:Biochemistry, molecular and cell biology. (2022) 8:

DOI: 10.1016/j.heliyon.2022.e09828

Abstract

Background: Tannins are a group of phenolic compounds that can modify the rumen biohydrogenation (BH) of polyunsaturated fatty acids (PUFA), but to date results obtained have been inconsistent. This study therefore aims to conduct a meta-analysis of the scientific literature related to the effects of tannins on rumen BH and fermentation. Methods: A total of 28 articles were collected from various scientific databases, such as Scopus, Science Direct and Google Scholar, and the data were analysed using a random effects model and meta-regression for rumen BH. The publication bias on the main variables of rumen fermentation was assessed using a funnel plot and Egger’s test. Results: An increase in tannin levels significantly reduced methane production (p \textless 0.001) and the population of Butyrivibrio fibrisolvens (p \textless 0.05). Dietary tannins also decreased the SFA proportion (p \textless 0.001) and increased (p \textless 0.001) the rumen monounsaturated fatty acid (MUFA) and polyunsaturated fatty acid (PUFA) proportions. In additions, there were negative relationships between dietary tannin levels and BH rates of C18:2 n-6 and C18:3 n-3 (p \textless 0.05). Conclusion: Dietary tannins modulate the rumen fermentation profile, mitigate methane emissions, and inhibit rumen BH of PUFA.

Citation

Makmur, M., Zain, M., Sholikin, M. M., Suharlina, & Jayanegara, A. (2022). Modulatory effects of dietary tannins on polyunsaturated fatty acid biohydrogenation in the rumen: a meta-analysis. Special Issue:Biochemistry, Molecular and Cell Biology., 8(7). https://doi.org/10.1016/j.heliyon.2022.e09828 meta-analysis, diets, rumen, models, rumen fermentation, domestic animals, livestock, feed additives, methane production, methane, ruminant feeding, tannins, polyenoic fatty acids, rumen flora, Fatty Acids, Unsaturated, monoenoic fatty acids, rumen bacteria

Keywords

• meta-analysis
• diets
• rumen
• models
• rumen fermentation
• domestic animals
• livestock
• feed additives
• methane production
• methane
• ruminant feeding
• tannins
• polyenoic fatty acids
• rumen flora
• Fatty Acids
• Unsaturated
• monoenoic fatty acids
• rumen bacteria