Preparation method and application of fusion protein and vaccine composition containing same

A vaccine composition and fusion protein technology, applied in the field of veterinary biological products, can solve problems such as poor immune effect

Active Publication Date: 2015-01-14
PU LIKE BIO ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But current Mycoplasma typhimurium aroA expressing a recombinant Mycoplasma

Method used

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  • Preparation method and application of fusion protein and vaccine composition containing same
  • Preparation method and application of fusion protein and vaccine composition containing same
  • Preparation method and application of fusion protein and vaccine composition containing same

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0091] Embodiment 1 Expression, identification and purification of fusion protein PEA-NrdF-KDEL

[0092] According to NCBI (http: / / www.ncbi.nlm.nih.gov) reported Pseudomonas aeruginosa PAO1 (accession number: AE004091), Mycoplasma hyopneumoniae J strain (accession number: AE017243.1) The gene sequence (seeing SEQ ID No.3) in the NrdF protein in, amplifies Pseudomonas exotoxin A (PEA) structural domain I and II with PCR method, amplifies Mycoplasma hyopneumoniae NrdF protein with RT-PCR method and using continuous PCR to amplify the gene (SEQ ID NO.16) containing the KDEL polypeptide at the carboxy-terminal part. After the cloning is completed, they are connected in series by means of genetic engineering as a fusion protein.

[0093] 1.1 Construction and identification of PEA domain I and II, NrdF gene cloning vector

[0094] According to the selected PEA domain I and II gene (see SEQ ID No.1) sequence, NrdF gene (see SEQ ID NO.3) sequence, use Primer Premier5.0 software to d...

Embodiment 2

[0118] Example 2 Expression, identification and purification of fusion protein PEA-P97R1-NrdF-KDEL

[0119] 2.1 Construction and identification of pMD18-T-PEA-P97R1-NrdF-KDEL cloning vector

[0120] According to the gene sequence in the P97R1 protein in PEA (accession number: AE004091), Mycoplasma hyopneumoniae J strain (accession number: AE017243.1) reported by NCBI (http: / / www.ncbi.nlm.nih.gov) (see SEQ ID No.7), use Primer Premier5.0 software to design primers, respectively amplify PEA gene, P97R1 gene, the primer sequences are as follows:

[0121] PEA upstream primer: 5'-GCCGAGGAAGCCTTCGAC-3',

[0122] PEA downstream primer: 5'-GCCGTCGCCGAGGAACT-3',

[0123] P97R1 upstream primer: 5'-GGTATATTACTCTCAGCCCCCA-3',

[0124] P97R1 downstream primer: 5'-TTCCGGTGTTTTTAGGCTTAA-3',

[0125] The amplified products of PEA gene and P97R1 gene were recovered and stored at -20°C.

[0126] The purified P97R1 gene and PEA gene were used as templates, and the two fragments were connect...

Embodiment 3

[0133] Example 3 Preparation of fusion proteins PEA-P102-KDEL, PEA-P97R1-KDEL, PEA-P97R2-KDEL, PEA-P97R2-NrdF-KDEL

[0134] 3.1 Preparation of fusion proteins PEA-P102-KDEL, PEA-P97R1-KDEL, PEA-P97R2-KDEL

[0135] According to the PEA (accession number: AE004091) reported by NCBI (http: / / www.ncbi.nlm.nih.gov), and referring to the gene sequences in the P102 protein, P97R1 protein, and P97R2 protein in the Mycoplasma hyopneumoniae J strain ( See SEQ ID NO.5, SEQ ID NO.7, SEQ ID NO.9 in turn), construct the cloning vector and expression vector according to the method of Example 1 and perform double enzyme digestion, and name the fusion proteins identified correctly after enzyme digestion PEA-P102-KDEL, PEA-P97R1-KDEL, PEA-P97R2-KDEL.

[0136] The identified fusion proteins PEA-P102-KDEL, PEA-P97R1-KDEL, and PEA-P97R2-KDEL were purified, dialyzed and then concentrated. The concentrated protein content was 1 mg / mL and stored at -20°C.

[0137] 3.2 Preparation of fusion protein PEA...

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Abstract

The invention provides a fusion protein, a fusion protein-containing vaccine composition for mycoplasmal pneumonia of swine (MPS) and an application of the vaccine composition. The fusion protein comprises pseudomonas exotoxin A structural domains I and II, an antigenic protein for MPS and a carboxyl terminal part, wherein the antigenic protein for MPS comprises any one of an NrdF protein, a P102 protein, a P97R1 protein, a P97R2 protein, a P97R1-NrdF protein and a P97R2-NrdF protein. The invention also discloses the vaccine composition containing immune dosage of fusion protein and the application of the vaccine composition to preparation of drugs for preventing and/or treating MPS. The vaccine composition has the advantages that recombinant expression can be carried out on the components of the vaccine composition in quantity by means of genetic engineering, thus not only consuming short time but also facilitating large-scale production; the vaccine composition can generate humoral immunity and cellular immunity and can gain better immune effects.

Description

technical field [0001] The invention belongs to the technical field of veterinary biological products, and in particular relates to the preparation and application of a mycoplasma hyopneumoniae fusion protein and a vaccine composition containing the fusion protein. Background technique [0002] Mycoplasma pneumonia of swine (MPS) is also known as swine asthma (Li Yanming, Zhang Ying. Advances in biological research on Mycoplasma hyopneumoniae, Advances in Veterinary Medicine, 2003, 24(3): 25-27) or pig endemic Pneumonia is a contact chronic respiratory disease of pigs caused by Mycoplasma hyopneumoniae (Mhp). Manifested as cough and dyspnea, dissection showed fleshy or marbled lung tissue lesions. [0003] The Ross study at the University of Iowa found that after Mhp infection, the ability of lymphocytes to produce antibodies decreased, cellular immunity decreased, and the ability of alveolar macrophages to phagocytize and clear pathogens also decreased, and the activity of...

Claims

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Application Information

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IPC IPC(8): C07K19/00C12N15/70A61K39/02A61K39/295A61K39/116A61P31/04A61P31/14A61P31/16A61P31/20A61P31/22
Inventor 张许科孙进忠王莹田克恭
Owner PU LIKE BIO ENG
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