Influence of zinc sulfate and threonine supplementation on mucin 5ac gene expression in the small intestine and intestinal mucosal morphology in broiler chickens
2024
Justin Adébayo Hounkpêvi | Hai Lin | Benjamin Adjei-Mensah | Kokou Tona | Were Pitala
A 42-day feeding trial was carried out to evaluate the effect of dietary supplementation of zinc and threonine on the integrity of intestinal mucosa and expression of intestinal mucin 5ac (MUC5AC) gene in broiler chickens. A total of 640-day-old Arbor Acres broiler chicks were allocated to four dietary treatments with eight replicates of 20 birds in a completely randomized design. The experimental diets included T0: control (standard diet), T1: standard diet + 40 mg/kg Zinc Sulfate (ZnSO4), T2: standard diet + 2% L-Threonine (L-Thr) and T3: standard diet + (40 mg/kg ZnSO4 + 0.2% L-Threonine (L-Thr)). During the starter phase, the average daily gain and body weight of birds fed the T1 diet was lower (p < 0.05) than T2 and T0. The villus height (VH) of the jejunum in T2 was longer (p < 0.05) than in T0 and T3. In the ileum, VH for T1 was longer (p < 0.05) than for T0. The MUC5AC mRNA expression in the duodenum at the starter phase was lower (p < 0.05) in T3 than in T2 while in the jejunum, T1 was higher (p < 0.05) than the other treatment groups. The supplementation of zinc and threonine in the diet can improve the intestinal integrity of broiler chickens.
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