Long-term effects of oral tea polyphenols and Lactobacillus brevis M8 on biochemical parameters, digestive enzymes, and cytokines expression in broilers

Abstract

This study investigates the long-term effects of oral tea polyphenols (TPs) and Lactobacillus brevis M8 (LB) on biochemical parameters, digestive enzymes, and cytokines expression in broilers. In experiment 1, 240 broiler chickens were selected to investigate the effects of 0.06 g/kg body weight (BW) TP and 1.0 ml/kg BW LB on broilers; in experiment 2, 180 broiler chickens were assigned randomly to three groups to investigate the effects of different dosages of TP (0.03, 0.06, and 0.09 g/kg BW) combined with 1.0 ml/kg BW LB on broilers; in experiment 3, 180 broiler chickens were assigned randomly to three groups to investigate the effects of different dosages of LB (0.5, 1.0, and 1.5 ml/kg BW) combined with 0.06 g/kg BW TP on broilers. The results showed that TP and LB affected serum biochemical parameters, and TP reduced serum cholesterol (CHO) and low-density lipoprotein cholesterol (LDL-C) abundances in a dosage-dependent manner (P<0.05) on Day 84. Meanwhile, broilers fed a diet supplemented with TP or LB had a lower intestinal lipase activity on Day 84 compared with the control group (P<0.05). Middle and high dosages of TP increased pancreatic lipase and proventriculus pepsin activities (P<0.05). Also middle and high dosages of LB significantly enhanced pancreatic lipase activity (P<0.05), while high LB supplementation inhibited intestinal trypsase (P<0.05) on Day 84. Furthermore, both TP and LB reduced intestinal cytokine expression and nuclear factor-κ B (NF-κB) mRNA level on Days 56 and 84. In conclusion, long-term treatment of TP and LB improved lipid metabolism and digestive enzymes activities, and affected intestinal inflammatory status, which may be associated with the NF-κB signal.

Potential of plant polyphenols to combat oxidative stress and inflammatory processes in farm animals

“…With regard to potential effects of polyphenols on inflammation in broilers, only one study is available so far. That study investigated the effect of tea polyphenols (0.03–0.09 g/kg body weight) on the expression of various proinflammatory cytokines (IL‐1B, IL‐4, IL‐6, IL‐10, TNF, IFN‐γ) in the intestine of broilers (Li et al., ). It was found that most of these genes were downregulated by tea polyphenols.…”

Beneficial Effects of Green Tea Catechin on Veterinary Sciences and Bacterial Infections

“…As long -term effects in chicken, tea polyphenols improved lipid metabolism and digestive enzymatic activities, and affected inflammatory status [35]. ECG supplementation significantly down-regulated the expression of fatty acid synthesis and β-oxidation/lipolysis genes [30]. They suggested that EGCG could alleviate fat deposition via the improved metabolism.…”

Evaluation of the antioxidant property and effects in Caenorhabditis elegans of Xiangxi flavor vinegar, a Hunan local traditional vinegar

“…These microorganisms include fungi (Rhizopus, Monascus, yeast, etc. ) and bacteria (mainly lactic acid bacteria, Bacillus, and acetic acid bacteria) (Wu et al, 2012;Li et al, 2015). For storage, Qu is predried in the sun (Fig.…”