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  • Title: Influence of Trans-anethole on the nutrient digestibility and intestinal barrier function in broilers.
    Author: Yu C, Zhang J, Zhang H, Chen Y, Wang C, Zhang L, Ding L, Wang T, Yang Z.
    Journal: Poult Sci; 2021 Dec; 100(12):101489. PubMed ID: 34695630.
    Abstract:
    This experiment was undertaken to investigate the effects of dietary trans-anethole (TA) at 5 levels (0, 200, 400, 600, and 800 mg/kg of diet) on the growth performance, apparent nutrient digestibility and intestinal barrier function in broilers. Three hundred twenty 1-day-old Arbor Acres broilers were randomly divided into the 5 dietary treatments with 8 replicates each for 42 d. Dietary TA supplementation increased (P < 0.05) average daily feed intake (ADFI), but had no effects (P > 0.05) on average daily gain (ADG), feed/gain (F/G), and body weight (BW) of broilers throughout the entire experimental period. The apparent metabolizable energy (AME) and nitrogen-corrected apparent metabolizable energy (AMEn), the apparent total tract digestibility of dry matter (DM), crude protein (CP), organic matter (OM), and gross energy (GE) showed a quadratic increase (P < 0.05) with the increasing TA concentration in the diet. The apparent ileal digestibility of Lys, Met, Leu, Thr, Ala, Tyr, and Pro were higher (P < 0.05) in birds fed TA diets compared with control group. Dietary supplementation of 400 mg/kg of TA increased (P < 0.05) mRNA levels of jejunal and ileal Na+/glucose co-transporter (SGLT1) on d 21 and d 42, oligopeptide transporter 1 (PepT1) on d 42, and ileal mRNA expressions of occludin (OCLN), claudin-1 (CLDN-1), and mucin 2 (MUC2), villus height (VH), crypt depth (CD), and VH:CD on d 21, as well as jejunal zonula-occludens-1 (ZO-1) and ileal mucin 2 on d 42. Linear or quadratic responses of the jejunal CD and villus VH:CD ratio occurred (P < 0.01) with increasing dietary TA concentration on d 42. The inclusion of 400 mg/kg TA decreased (P < 0.05) cecal Escherichia coli population on d 21 and d 42, but increased (P < 0.05) Bifidobacterium population on d 21 and ileal Bifidobacterium on d 42. In conclusion, 400 mg/kg of TA is the optimum concentration for increasing nutrient utilization and intestinal barrier function of broilers.
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