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The experiment was conducted to evaluate the effect of β-1,3/1,6-glucan on growth performance, immunity and endocrine responses of weanling piglets. One hundred and eighty weanling piglets (LandracexLarge White, 7.20±0.25 kg BW and 28±2 d of age) were randomly fed 1 of 5 treatment diets containing dietary β-1,3/1,6-glucan supplemented at 0, 25, 50, 100 and 200 mg/kg for 4 wks. Each treatment was replicated in 6 pens containing 6 pigs per pen. On d 14 and 28, body weight gain, feed consumption and feed efficiency were recorded as measures of growth performance. Peripheral blood lymphocyte proliferation and serum immunoglobulin G (IgG) were measured to study the effect of dietary β-1,3/1,6-glucan supplementation on immune function. Plasma prostaglandin E 2 (PGE 2 ), growth hormone (GH) and ghrelin were measured to investigate endocrine response to β-1,3/1,6-glucan supplementation. Our results suggest that average daily gain (ADG) and feed efficiency had a quadratic increase trend with dietary β-1,3/1,6-glucan supplementation from d 14 to 28, whereas it had no significant effect on average daily feed intake (ADFI). The treatment group fed with 50 mg/kg dietary β-1,3/1,6-glucan supplementation showed a numerical increase in ghrelin, a similar change trend with ADG and no significant effect on GH. Lymphocyte proliferation indices, serum IgG and plasma PGE 2 concentrations varied linearly with dietary supplementation levels of β-1,3/1,6-glucan on d 14. Higher levels of β-1,3/1,6-glucan may have a transient immuno-enhancing effect on the cellular and humoral immune function of weanling piglets via decreased PGE 2 . Taking into account both immune response and growth performance, the most suitable dietary supplementation level of β-1,3/1,6-glucan is 50 mg/kg for weanling piglets.

asian-australasian journal of animal sciences

Effect of Dietary 棺-1,3/1,6-glucan Supplementation on Growth Performance, Immune Response and Plasma Prostaglandin E2, Growth Hormone and Ghrelin in Weanling Piglets