›› 2019, Vol. 46 ›› Issue (3): 905-912.doi: 10.16431/j.cnki.1671-7236.2019.03.032

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Effect of Non-antigen Protein of Foot-and-Mouth Disease Vaccine on Immune Effect of 146S Antigen

LI Ming1, ZHANG Yana2, GUO Xiaoyu1, GAO Xintao1,3, LI Jinxiang1, ZHU Hongfei1   

  1. 1. Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    2. Beijing Xinhexiang Technology Co., LLC, Beijing 100085, China;
    3. Biotechnology Research Institute, Chinese Academy of Agricultural Sciences, Beijing 100081, China
  • Received:2018-07-30 Online:2019-03-20 Published:2019-03-20

Abstract:

In order to explore the effect of non-antigen protein on the immune effect of foot-and-mouth disease virus type A (FMDV-A) 146S antigen,mice and pigs were used as experimental animals.5 groups of mice for injection were prepared:Group A (3 μg 146S antigen),group B (3 μg 146S antigen+25 μg non-antigenic protein),group C (3 μg 146S antigen+50 μg non-antigenic protein),group D (3 μg 146S antigen+100 μg non-antigenic protein) and group E (blank control,PBS).At the same time,four groups of pig injection samples were prepared:Group A (18 μg 146S antigen),group B (18 μg 146S antigen+400 μg non-antigenic protein),group C (18 μg 146S antigen+4 000 μg non-antigenic protein) and group D (blank control,PBS).The cell immune response levels of mice in different vaccine sample groups were compared by lymphocyte proliferation assay and Real-time PCR.The level of humoral immune response produced by the animals (mice and pigs) of each test group was detected and evaluated by a liquid phase blocking ELISA method.The results of mice test showed that the average antibody level of group C was the highest in four test groups at the three test time points after immunization,and the average antibody titers were 4.13,5.83 and 5.50,respectively,while the antibody of group D was the lowest,the average antibody titer average antibody titers were 3.46,5.16 and 4.46 in the antibody detection,respectively;The cell proliferation ability and Th-1 type cytokine IL-6,IFN-β and TNF-α mRNA expression in group C were higher than other groups.The results of pigs test showed that the average antibody level between groups A and B was not significantly different (P>0.05),but the average antibody titers of groups A and B were extremely significantly higher than that of group C (P<0.01).The above results indicated that a small amount of non-antigenic protein had no effect on the immune effect of FMDV-A 146S antigen within a certain range,while a high concentration of non-antigenic protein inhibited the immune effect of FMDV-A 146S antigen.

Key words: non-antigenic proteins; foot-and-mouth disease; 146S antigen; immune effect

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