Effects of Beer Yeast on Immunity and Antioxidant Capacity of Growing Rex Rabbits

WU Fengyang, SHI Youchuan, CUI Jia, WANG Haonan, CHANG Xingfa, CHEN Baojiang

doi:10.3969/j.issn.1006-267x.2019.04.044

Chinese Journal of Animal Nutrition >

2019 , Vol. 31 >Issue 4: 1850 - 1856

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.04.044

Molecular Nutrition

Effects of Beer Yeast on Immunity and Antioxidant Capacity of Growing Rex Rabbits

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1. College of Animal Science and Technology, Agricultural University of Hebei, Baoding 071000, China;
2. Research Center of Cattle and Sheep Embryo Engineering Technique of Hebei, Baoding 071000, China

Received date: 2018-10-09

Online published: 2019-04-16

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Abstract

The purpose of this experiment was to investigate the effects of different supplemental levels of beer yeast on immunity and antioxidant capacity of growing Rex rabbits. A total of 120 healthy white Rex rabbits (male and female half) with a similar body weight at 30 days of age were divided into 4 groups with 30 replicates per group and 1 replicate per replicate. Rex rabbits in the control group was fed a basal diet, and those in test groups Ⅰ, Ⅱ and Ⅲ were fed the experimental diets that replaced the soybean meal of basal diets with 5, 10, 15 kg/t beer yeast, respectively. The pre-feeding period lasted for 7 days, and the experimental period lasted for 60 days. The results were as follows:1) the mortality of Rex rabbits of all test groups was lower than that of the control group, but there was no significant difference (P>0.05). 2) On day 20, day 40 and day 60, the spleen index of Rex rabbits of all test groups was higher than that of the control group, but there was no significant difference (P>0.05). On day 20, the thymus index of Rex rabbits of all test groups were significantly higher than that of the control group (P<0.05); on day 40, the thymus index of Rex rabbits of test Ⅱ group were significantly higher than that of the control group (P<0.05); on day 60, there was no significant difference on the thymus index among all groups (P>0.05). 3) The spleen and thymus cell density of Rex rabbits of all test groups were higher than those of the control group (except the spleen cell density of test Ⅰ group was low than that of the control group), but there was no significant difference (P>0.05). 4) On day 20, day 40 and day 60, there was no significant difference on the serum immunoglobulin A (IgA) content among all groups (P>0.05). On day 20, the serum immunoglobulin M (IgM) content of test Ⅲ group was significantly higher than that of the control group (P<0.05). On day 40 and day 60, the serum immunoglobulin G (IgG) content of test Ⅱ group was significantly higher than that of the control group (P<0.05). 5) On day 20, day 40 and day 60, there was no significant difference on the serum malondialdehyde (MDA) content and superoxide dismutase (SOD) activity among all groups (P>0.05). On day 20, the serum glutathione peroxidase (GSH-Px) activity of test Ⅱ group was significantly higher than that of the control group (P<0.05). On day 60, the serum total antioxidant capacity (T-AOC) of test Ⅱ group was significantly higher than that of the control group (P<0.05). Considering all indexes of this experiment, beer yeast can improve the immunity of growing Rex rabbits by promoting the development of thymus and spleen and increasing serum immunoglobulin contents, it also can improve the antioxidant capacity of the growing Rex rabbits by increasing the serum T-AOC and GSH-Px activity.

Key words： beer yeast; Rex rabbits; immunity; antioxidant capacity

Cite this article

WU Fengyang, SHI Youchuan, CUI Jia, WANG Haonan, CHANG Xingfa, CHEN Baojiang . Effects of Beer Yeast on Immunity and Antioxidant Capacity of Growing Rex Rabbits[J]. Chinese Journal of Animal Nutrition, 2019 , 31(4) : 1850 -1856 . DOI: 10.3969/j.issn.1006-267x.2019.04.044

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