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- W4290802307 abstract "This study was to evaluate the effects of soy protein concentrate (SPC) supplementation replacing animal protein supplements on intestinal immune status, intestinal oxidative stress status, nutrient digestibility, mucosa-associated microbiota, and growth performance of nursery pigs. Thirty-two newly weaned pigs at 21 d of age with 6.4 ± 0.4 kg body weight (BW) were allotted to four treatments in a randomized complete block design with initial BW and sex as blocks. Pigs were fed for 35 d in three phases. Dietary treatments were SPC 0% (diets with fish meal 4/2/1%, poultry meal 10/8/4%, blood plasma 4/2/1%, and crude protein 24.6/22.6/20.9% for phase 1/2/3, respectively), SPC 33%, SPC 66%, and SPC 100% (SPC 0% diets with SPC replacing 33/66/100% of animal protein supplements, respectively). Pigs were euthanized on day 35 to collect jejunal mucosa and tissues to evaluate intestinal immune status, intestinal oxidative stress status, intestinal morphology, and mucosa-associated microbiota in the jejunum. Titanium dioxide was added in phase three diets as an indigestible marker. Ileal digesta was collected to measure apparent ileal digestibility (AID) of nutrients. Data were analyzed using MIXED and NLMIXED procedures of SAS. Increasing SPC supplementation by replacing animal protein supplements linearly decreased (P < 0.05) the BW, ADG, and ADFI of pigs during the overall period, and linearly increased (P < 0.05) peptide tyrosine tyrosine (PYY) in jejunum. Increasing SPC supplementation linearly decreased (P < 0.05) feed cost per weight gain. In the exponential model, SPC can replace animal protein supplements up to 10.5% and 16.5% without reducing the ADG and ADFI of pigs, respectively. The SPC 100% decreased (P < 0.05) Helicobacteraceae, Campylobacteraceae, alpha diversity, and changed beta diversity of microbiota in the jejunal mucosa. In conclusion, SPC supplementation replacing animal protein supplements reduced growth performance by reducing feed intake, which might be related to increased PYY. However, 10.5% and 16.8% of animal protein supplements can be replaced by SPC without affecting BW gain and feed intake of nursery pigs, respectively. Complete removal of animal protein supplements by SPC supplementation modulated the composition of jejunal mucosa-associated microbiota by reducing Helicobacteraceae and Campylobacteraceae, whereas without affecting the intestinal immune status, intestinal oxidative stress status, intestinal morphology, and AID of nutrients in nursery pigs.Due to the high-quality nutrients and functional compounds, animal protein supplements are generally included in nursery pig diets to relieve the negative impacts caused by weaning stress. However, the high cost, short supply, and potential safety issues of animal protein supplements limit their use. Soybean meal is commonly used in swine diets due to the high nutritional values and competitive cost, however, antinutritional factors in soybean meal have been shown to impair the health and growth of nursery pigs. Soy protein concentrate is processed from soybean meal by ethanol extraction and efficiently removes the anti-nutritional factors. The aim of this study was to investigate the effects of soy protein concentrate replacing animal protein supplements at various levels on intestinal immune status, intestinal oxidative stress status, nutrient digestibility, and growth performance of nursery pigs. The use of soy protein concentrate completely replacing animal protein supplements showed benefits on modulating the bacterial ecosystem on the mucosal lining of the small intestine by decreasing potentially harmful bacteria, whereas without affecting intestinal immune status, intestinal oxidative stress status, intestinal morphology, and nutrient digestibility. However, excessive use of soy protein concentrate replacing animal protein supplements decreased the weight gain of nursery pigs due to reduced feed intake." @default.
- W4290802307 created "2022-08-12" @default.
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- W4290802307 date "2022-08-11" @default.
- W4290802307 modified "2023-10-14" @default.
- W4290802307 title "Soy protein concentrate replacing animal protein supplements and its impacts on intestinal immune status, intestinal oxidative stress status, nutrient digestibility, mucosa-associated microbiota, and growth performance of nursery pigs" @default.
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- W4290802307 doi "https://doi.org/10.1093/jas/skac255" @default.
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