中藥疫苗稀釋劑提高豬偽狂犬和豬瘟弱毒疫苗的免疫效果研究
[Abstract]:Pseudorabies (Pr) is a highly contagious animal disease caused by Pseudorabies virus (PrV). Pr is very harmful to the pig industry. The mortality rate of piglets within 15 days of age after infection is as high as 100%, and that of weaned piglets is about 10-10%. 20%. Classical swine fever (CSF) is another severe infectious disease caused by Classical swine fever virus (CSFV), which has caused great economic losses to the pig industry in China. Animals, however, in many cases vaccines can not effectively stimulate the body to produce an ideal immune response and lead to immune failure. Therefore, this paper intends to study vaccine diluents with immune enhancement effect to improve the immune effect of attenuated pseudorabies virus (aPrV) vaccine and attenuated swine fever vaccine for clinical application. Objective: To select the appropriate immune enhancer formula of aPrV vaccine. Methods: ICR mice were immunized with aPrV vaccine, and serum specific PrV gB antibody was used as the index to evaluate the immune enhancement effect of Atractylodes macrocephala polysaccharide (RAMPS) and ginseng stem and leaf saponin (GSLS), serum PrV gB, PrVgBIgGl, PrVgBIgG2a and attack. Results: GSLS, RAMPS and thiomersal (TS) could enhance the level of serum PrVgB antibody in mice. GSLS combined with RAMPS had no synergistic effect, GSLS combined with TS showed synergistic effect, and GSLS-TS (6ug-1ug) had the most obvious effect. This formula can promote the production of serum PrV gB, PrV gB IgG1 and PrV gB IgG2a antibodies in advance, and can maintain a higher level of antibodies for a longer time. AIM: To observe the effect of sterilization and storage conditions on immune enhancement of GSLS-TS. Methods: ICR mice were immunized by diluting aPrV vaccine with GSLS-TS solution treated by different sterilization methods and GSLS-TS solution preserved under different storage conditions for one year. Serum specific antibody level was used as an index to evaluate the immune enhancement. Results: High temperature (100-121 C) treatment and illumination significantly reduced the immune enhancement effect of GSLS-TS. Therefore, GSLS-TS solution is not suitable for high temperature sterilization, and is suitable for storage under low temperature and light-proof conditions. 3. GSLS-TS and other six commercial diluents adjuvant effect comparison purposes: Methods: ICR mice were used to dilute 6 different manufacturers'aPrV vaccines with GSLS-TS solution, and compared with their own special vaccine diluents and saline. Serum specific antibody levels were taken as indicators. Diluents, other manufacturers of vaccine diluent immune enhancement effect is not obvious, compared with normal saline has no significant difference. The immune enhancement effect of.GSLS-TS solution is significantly better than normal saline and 6 special vaccine thinner.4.GSLS-TS to enhance the antibody response of pigs to Pr and CSF attenuated vaccines. Objective: To observe GS through this animal experiment. The immune enhancement effect of LS-TS on swine attenuated vaccine. Methods: immunized pigs were diluted with GSLS-TS solution diluted with Pr and CSF attenuated vaccine respectively. The serum specific antibody level was used as an indicator to evaluate the effect of GSLS-TS on the humoral immunity induced by vaccine. Results: GSLS-TS can also promote the humoral immune response of pigs to two attenuated vaccines of Pr and CSF, and significantly promote the immune response. Serum specific antibodies, antibody subclasses and neutralizing antibody titers. Results: GSLS-TS could rapidly promote the early immune response induced by vaccine (NK cell killing activity, serum IFN-gamma production), significantly enhance the proliferative activity of splenic lymphocytes, and enhance the secretion of Thl (IFN-gamma, IL-12) and Th2 (IL-5, IL-10) cytokines by lymphocytes. Level. 6. GSLS-TS immunopotentiation mechanism: To explore the mechanism of GSLS-TS immunopotentiation. Methods: GSLS and/or TS were co-incubated with mouse macrophage RAW264.7, and the mRNA expression of microRNAs-132, microRNAs-146 a, microRNAs-147 and microRNAs-155 were used as indicators to analyze the effects of GSLS or (and) TS on the levels of these four microRNAs in RAW264.7 cells. Immune aPrV vaccine was given to ICR and C3H/HeJ mice. Serum specific antibodies, lymphocyte proliferation reaction and the expression of Thl and Th2 cytokine mRNA in lymphocytes were used as indicators to preliminarily analyze the relationship between GSLS-TS immunopotentiation and TLR4. Results: When cultured with GSLS or (and) TS and RAW264.7 cells, the expression of Mi-1 was significantly increased. GSLS-TS can simultaneously enhance the serum specific antibody response in ICR mice and C3H/HeJ mice immunized with aPrV vaccine, and enhance the lymphocyte proliferation activity induced by Con A and PrV antigens and the expression of Thl (IFN-gamma, IL-12) and Th2 (IL-5, IL-1) in lymphocytes. To sum up, GSLS and TS have synergistic effects on antibody response induced by aPrV vaccine. GSLS-TS can significantly enhance the early immune response, humoral immune response, cellular immune response and resistance to field virus attack in aPrV immunized mice. This animal experiment shows that thinner can significantly enhance pig's antibody response induced by Pr and CSF attenuated vaccine, showing a good clinical potential..GSLS-TS's immune enhancement is not directly mediated by TLR4, which may be related to the up regulation of miR-132, miR-146a, miR-147 and miR-155 in immune cells. The mechanism needs to be further studied.
【學(xué)位授予單位】:浙江大學(xué)
【學(xué)位級(jí)別】:博士
【學(xué)位授予年份】:2017
【分類(lèi)號(hào)】:S858.28
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