Preparation method and application of tilapia source streptococcus agalactiae recombinant GroEL protein vaccine
A technology for streptococcus niles and protein vaccine, which is applied in the field of molecular vaccinology, can solve the problem of ineffectiveness of streptococcus iniae and other problems, and achieves the effects of simple preparation method, high yield and safe preparation process
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Embodiment 1
[0051] Example 1 Preparation of Streptococcus agalactiae Recombinant from Tilapia GroEL protein
[0052] 1. Primer design:
[0053] Using Streptococcus agalactiae from tilapia as a template, a pair of primers GroEL-F and GroEL-R containing restriction enzymes were designed with the following sequences:
[0054] Primer GroEL-F (sequence shown in SEQ ID NO.3):
[0055] 5'-G GAATTC ATGGCAAAAGATATTAAATTTTC-3'
[0056] Primer GroEL-R ((sequence shown in SEQ ID NO.4)):
[0057] 5'-GGG TTCGAA GAAGCCACCCATCATAGATGG-3'
[0058] The underlined part of the upstream primer GroEL-F is EcoR I Restriction site, the underlined part of the downstream primer GroEL-R is Hind III Restriction sites.
[0060] (1) PCR amplification GroEL Gene
[0061] The genomic DNA of Streptococcus agalactiae derived from tilapia was extracted, and the genomic DNA was used as a template to carry out PCR reaction on GroEL-F and GroEL-R with the above primers...
Embodiment 2
[0092] Example 2 Preparation of Streptococcus agalactiae Recombinant from Tilapia GroEL protein vaccine
[0093] The purified recombinant GroEL protein obtained in Example 1 was diluted to 1 mg / ml with sterilized PBS, mixed evenly with Freund's complete and incomplete adjuvant at a ratio of 1:1, and prepared into a subunit vaccine.
[0094] Take 1ml of the prepared vaccine and centrifuge at 3000×g for 5 minutes. If there is no stratification of the vaccine, it can be used for subsequent immunization.
Embodiment 3
[0095] Example 3 Streptococcus agalactiae recombinant from tilapia GroEL Protein Vaccine Immunization Test
[0096] 1. Immune protection experiment
[0097] (1) Nile tilapia was purchased from Guangzhou Chengyi Aquatic Technology Co., Ltd., with a size of 50±5.0g, and was kept for two weeks before the experiment.
[0098] (2) During the immunization experiment, the tilapia were randomly divided into 3 groups, namely PBS group, PBS+adjuvant group and GroEL vaccine group. There are 14 tails in each group, and each group is set up in three parallels.
[0099] The GroEL group and the adjuvant group were injected intraperitoneally with 100 µl of recombinant antigen GroEL mixed with Freund's adjuvant and PBS, respectively, and the PBS group was injected with 100 µl of sterilized PBS.
[0100] 2. Immunization procedure
[0101] The tilapia were immunized twice, the initial immunization with Freund's incomplete adjuvant, and the booster immunization with Freund's complete ...
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