A kind of non-resistance screening kiss1 eukaryotic expression plasmid and its application
A technology for expressing plasmids and resistance screening, which is applied in the direction of antibacterial drugs, bacterial antigen components, and the use of vectors to introduce foreign genetic materials. It can solve problems such as increased costs, unfavorable vaccine promotion and application, and trace allergy. High-impact, easy-to-save effects
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Embodiment 1
[0018] Embodiment 1: Construction and large-scale preparation of non-resistance screening KISS1 eukaryotic expression plasmid pVAX-KISS1-S-asd
[0019] First synthesize the human KISS1 gene, which contains a HindIII restriction site at the 5' end and an EcoRI restriction site at the 3' end, and clones it into the HindIII and EcoRI restriction enzyme restriction sites of the eukaryotic expression vector pVAX1 (purchased from Invitrogen). site, the plasmid pVAX-KISS1 was obtained; then the plasmid pCMV-S was used as a template to amplify the HBsAg S gene, and then cloned into the NheI and HindIII restriction sites of the plasmid pVAX-KISS1 to obtain the intermediate plasmid pVAX - KISS1-S; replace the kanamycin gene (Kan) in the intermediate plasmid pVAX-KISS1-S with a non-resistance selection gene, the aspartate β-galactose dehydrogenase gene (asd), and will replace The resulting plasmid was transformed into Escherichia coli lacking the asd gene, and the positive clone x6097 / pV...
Embodiment 2
[0079] Embodiment 2: the application of animal immune castration gene vaccine of the present invention on sheep
[0080] 2.1 Vaccine immunization and sample collection
[0081] Six 8-week-old Hu sheep male lambs were randomly divided into 2 groups (purchased from Hubei Hengtai Sheep Breeding Co., Ltd.), with 3 lambs in each group. 24 hours before immunization, the animals were pretreated with 4 ml of 0.25% procaine hydrochloride intramuscularly injected into the quadriceps muscle at three points. Group T is the vaccine injection group, and the pVAX-KISS1-S-asd plasmid is injected intramuscularly at a dose of 1 mg per animal. The specific operation is to dissolve 1 mg of the plasmid vaccine in 4 ml of normal saline and then inject it at three points in the quadriceps of Hu sheep. C The control group was an empty plasmid control group, and the naked plasmid pVAX-asd was injected intramuscularly at a dose of 1 mg per mouse, and the specific operation was the same as that of the ...
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