枸杞多糖對(duì)甲型H1N1流感裂解疫苗黏膜免疫的佐劑效力研究
[Abstract]:The influenza virus is one of the major pathogens that threaten human health. At the end of April 2009, the new H1N1 (A/ California/7/2009) flu broke out in Mexico and then spread to more than one hundred countries. The World Health Organization (WHO) raised the early warning of the influenza A (H1N1) pandemic to the highest level at the sixth level on 11 June 2009, which means the first global pandemic of the influenza virus in the new millennium. The new H1N1 influenza A virus has been reformulated, and the population is generally lacking in resistance, and most of the infected people are young people and can be transferred to others within two or three days. At present, the virus is still in the crowd, the monitoring and prevention of the influenza is a long-term and challenging task, and the research on the influenza virus and its vaccine has significant public health significance. The vaccine is the best way to prevent the influenza virus, and the traditional vaccine is administered by intramuscular injection. But the influenza virus is mainly infected by the respiratory tract and enters the animal and the human body through the respiratory tract mucosa, so that the mucosal immunity is particularly important in the research field of the prevention of influenza virus infection. Through the nasal administration of the influenza vaccine, the local mucosal immune response can be induced, the specific sIgA can be secreted, not only can the infection be prevented in time, but also the cross protection can be more effectively provided. The adjuvant has the advantages of enhancing the immunogenicity of the vaccine, optimizing the immune response, reducing the amount of the antigen required to provide the protective immunity, and the like, so the safe and effective influenza virus inactivated vaccine mucosal adjuvant can be used for enhancing the immune effect of the influenza vaccine. The lycium barbarum polysaccharide (LBP) is a polysaccharide extracted from the fruit of the plant of the plant, can induce the proliferation of lymphocytes, regulate the secretion of the cytokines, promote the formation of the antibody and the complement, enhance the activity of NK cells, and have the function of enhancing immunity. Therefore, we think that the lycium barbarum polysaccharide may have an adjuvant effect on the mucosal administration of the vaccine. In the present study, we add or not add Lycium barbarum polysaccharide adjuvant to BALB/ c/ mice respectively with different doses of the A/ H1N1 influenza lysis vaccine (monovalent liquid), to only immunize the Chinese wolfberry polysaccharide and the healthy mice of the same age who do not have the vaccine as the control, The mucosal immune efficacy and the effect of Lycium barbarum polysaccharide on the adjuvant of the vaccine were studied. The IgG, IgG1, IgG2a antibody and the titer of the IgA antibody in the mouse nasal wash were determined by the ELISA method, and the titer of the antibody in the serum was determined by the HI method. Cytokine IFN-1 was secreted by the spleen cells using the Eliot method in order to evaluate the level of cellular immunity in the mice. after two weeks of second immunization, the mice were attacked by a lethal amount of homologous influenza virus, and the titer of the lung virus was measured, To observe the loss of body weight and the survival of the mice, the protective effect of the anti-lethal dose of the vaccine after the administration of the mucosal immune mice was evaluated. The results showed that the level of IgG in the serum of the mice with high dose of high-dose methylprednisolone was higher than that of the low-dose group, and the addition of the adjuvant of the lycium barbarum polysaccharide could improve the level of IgG in the mice. It is shown that LBP can enhance the humoral immunity induced by the first-flow cracking vaccine in the mice. The results showed that the IgG1 and IgG2a could be induced in the mice and the level of IgG1 antibody in all groups was slightly higher than that of IgG2a, indicating that the humoral immunity induced by the split vaccine in the body was Th1/ Th2 hybrid. And the lycium barbarum polysaccharide can improve the titer of the two types of antibody at the same time, and has an enhanced effect on the Th1 and the Tb2 type of immunity. In the higher dose vaccine adjuvant addition group, we detected a quantitative IgA, indicating that the nasal route was inoculated with a vaccine to induce a local mucosal immune response. The results of HI test show that the lycium barbarum polysaccharide can induce a higher level of antibody in the body-assisted nail-flow vaccine. The level of IFN-1 in the spleen cells of mice with LBP adjuvant group was significantly higher than that of other groups, indicating that it induced a strong cellular immune response in the mice. The protective ability of the mouse anti-lethal homologous virus attack is positively correlated with the dose of the inoculated vaccine, and the protective rate of the mice with the high-dose alpha-flow cracking vaccine is up to 100%, and the lycium barbarum polysaccharide shows good adjuvant effect. Therefore, the lycium barbarum polysaccharide can be used as a mucosal adjuvant to enhance the immune efficacy of the first-flow cracking vaccine.
【學(xué)位授予單位】:湖南師范大學(xué)
【學(xué)位級(jí)別】:碩士
【學(xué)位授予年份】:2012
【分類號(hào)】:R392
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