Bird flu synthetic peptide vaccine and preparation method thereof
A technology for synthesizing peptide vaccines and avian influenza, applied in the field of vaccines and their preparation, can solve problems such as loss of efficacy of biohazardous original vaccines, and achieve the effect of high level of immune response
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Embodiment 1
[0038] Example 1 : Solid Phase Synthesis of Polypeptide Antigens for Synthetic Peptide Vaccines
[0039] This example is the solid-phase synthesis of the polypeptide antigen of the synthetic peptide vaccine provided by the present invention. The polypeptide antigen of the present invention can be prepared by ABI 433A automatic polypeptide synthesizer by Merrifield solid-phase synthesis method, wherein 9-fluorenylmethoxycarbonyl (Fmoc) modified amino acid is used, and the solid phase carrier is Rink Amide MBHA resin. The production process usually includes solid-phase synthesis of polypeptide antigens, cleavage of polypeptides, purification of antigens and sterilized storage.
[0040] 1. Preparation of synthetic raw materials
[0041] The synthetic peptide vaccine polypeptide antigen sequence is the amino acid sequence shown in SEQ ID NO.1, the amino acid sequence shown in SEQ ID NO.2 and (SEQ ID NO.1) 2 -K-εK-CONH 2 Polymerized peptides of the indicated amino acid sequence...
Embodiment 2
[0053] Example 2 : Formulation of Synthetic Peptide Vaccines
[0054] This example is the formulation of the synthetic peptide vaccine provided by the present invention.
[0055] Dilute the peptide solution to 50 μg / ml with water for injection to prepare the antigen aqueous phase; Seppicmontanide ISA 50V oil adjuvant was sterilized at 121°C for 30 minutes, and used as the oil phase for later use. Under the condition of 22°C, according to the volume ratio of the antigen water phase and the sterilized oil phase 50V as 1:1, the oil phase was first added to the emulsification tank, stirred at a slow speed of 100 rpm for 2 minutes, and then the water phase was slowly added, and the Stir for 30 minutes after completion, then stir at a high speed of 9000 rpm for 20 minutes, then let it stand for 5 minutes, and then get the synthetic peptide vaccine against avian influenza virus after subpackaging, that is, the synthetic peptide whose amino acid sequence is shown in SEQ ID NO.1 Vac...
Embodiment 3
[0056] Example 3 : Efficacy Test of Synthetic Peptide Vaccines
[0057] In this example, the efficacy test of the synthetic peptide vaccine provided by the present invention is carried out, and the specific pathogen-free (SPF) chicken hemagglutination inhibition test is used to measure the immune effect of the synthetic peptide vaccine.
[0058] The 4-5 week-old SPF chickens were randomly divided into four groups, the first three groups had 10 SPF chickens in each group, and the control group had 5 SPF chickens. The specific grouping situation is shown in Table 1.
[0059] Table 1 Vaccine grouping and number of animals required
[0060] group
[0061] Each SPF chicken neck of the first three groups was subcutaneously injected with vaccine 0.3ml, and the control group SPF chicken neck was subcutaneously injected with normal saline 0.3ml. On the 21st day after inoculation, blood was collected from 5 control chickens, the serum was separated, and the HI antibody tite...
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