China Animal Husbandry and Veterinary Medicine ›› 2024, Vol. 51 ›› Issue (4): 1530-1536.doi: 10.16431/j.cnki.1671-7236.2024.04.021

• Nutrition and Feed • Previous Articles    

Effects of Grape Pomace on Lymphocyte Subsets,Lymphocyte Transformation Rate,Apoptosis Rate and Antioxidant Activity in Peripheral Blood of Beef Cows

WANG Jiandong1, DING Hui2, LIU Xin2, HOU Pengxia1, LIANG Xiaojun1, GAO Haihui1, WANG Ruigang3, JIANG Wu3   

  1. 1. Institute of Animal Science, Ningxia Academy of Agriculture and Forestry Sciences, Yinchuan 750002, China;
    2. College of Animal Science and Technology, Ningxia University, Yinchuan 750021, China;
    3. Ningxia Benwang Ecological Agriculture Limited Company, Yongning 750100, China
  • Received:2023-09-27 Published:2024-03-27

Abstract: 【Objective】 The aim of this study was to study the effects of grape pomace on lymphocyte subsets,lymphocyte conversion rate,apoptosis rate and antioxidant activity in peripheral blood of cows.【Method】 Twenty healthy postpartum beef cows with similar parity and body weight were randomly divided into 4 groups with 5 cows in each group.The beef cows in control group were fed a basal diet,and 240,300 and 360 g/d grape dregs were added to the basal diet per head in trial groups I,Ⅱ and Ⅲ,respectively.The pre-trial period lasted for 15 days,and the experimental period lasted for 40 days.The tail vein blood was collected and the lymphocyte subsets,the conversion rate and apoptosis rate of lymphocytes and the antioxidant level of peripheral blood were measured.【Result】 ①On the 20th day of the experiment,the proportion of CD4+T cells in peripheral blood of beef cows in all three experimental groups were significantly increased compared to the control group (P<0.05).On the 40th day of the experiment,the proportion of CD4+T cells in groups Ⅱ and Ⅲ were significantly increased compared to the control group (P<0.05),while the proportion of CD8+T cells were significantly reduced compared to the control group (P<0.05).The CD4+/CD8+ ratio in all three experimental groups were significantly increased compared to the control group (P<0.05).②On the 20th and 40th day of the experiment,the peripheral blood lymphocyte transformation rates of cows in groups Ⅱ and Ⅲ were significantly higher than those in the control group (P<0.01).On the 40th day of the experiment,as the amount of grape residue added increased,the apoptosis rate of peripheral blood lymphocytes showed a linear and extremely significant decrease (P<0.01).③On the 40th day of the experiment,the serum MDA content of three experimental groups of beef cows were significantly reduced compared to the control group (P<0.05).The serum T-AOC content of beef cows in experimental groups Ⅰ and Ⅲ were significantly higher than that of the control group (P<0.01).【Conclusion】 Adding different proportions of grape pomace to the diet of beef cows could improve their immune function.Under the experimental conditions,the appropriate level of grape pomace addition was (300-360) g/d.

Key words: beef cow; grape pomaces; lymphocyte; antioxidant activity

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