China Animal Husbandry and Veterinary Medicine ›› 2021, Vol. 48 ›› Issue (6): 2188-2195.doi: 10.16431/j.cnki.1671-7236.2021.06.032

• Preventive Veterinary Medicine • Previous Articles     Next Articles

Study on Immunoprotective Efficacy of Pasteurella Glycolytic Enzymes

ZHU Weifeng1,2,3, CHEN Lu1,2,3, WANG Fang1,2,3, HU Bo1,2,3, RUAN Zhiyang1,2,3, WANG Gaojie1,2,3   

  1. 1. Institute of Veterinary Medicine, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China;
    2. Key Laboratory of Veterinary Biological Engineering and Technology, Ministry of Agriculture and Rural Affairs, Nanjing 210014, China;
    3. National Center for Engineering Research of Veterinary Bio-products, Nanjing 210014, China
  • Received:2020-11-04 Online:2021-06-20 Published:2021-06-18

Abstract: The purpose of this study was to evaluate the immunoprotective efficacy of all 9 members of Pasteurella glycolytic enzymes as an antigen.Firstly,the glycolytic enzyme genes of Pasteurella multocida C51-17 strain were amplified by PCR and linked to pET-28a(+) plasmid.The recombinant plasmid was transferred into Escherichia coli BL21(DE3) strain and induced to express overnight.The recombinant proteins of Pasteurella glycolytic enzymes were purified from the supernatant of the collected strain after ultrasonic crushing.After SDS-PAGE,the Pasteurella glycolytic enzymes were transferred to PVDF membranes,and the recovered sera from C51-17 strain infection was incubated.ECL staining was performed after incubating the second antibody.At last,C57BL/6 mice were immunized with glycolytic enzymes.After high level of specific antibody was produced in the immunized groups,C51-17 strain was used to challenge.Sequencing results showed that the genes of all 9 members of the Pasteurella glycolytic enzymes were successfully cloned into pET-28a(+) plasmid,and the recombinant protein was obtained after induced expression and purification.Western blotting results showed that phosophoglucose isomerase (PGI),triose phosphate isomerase (TPI),glyceraldehyde-3-phosphate dehydrogenase (GPD),phosphoglycerate kinase (PGK),and pyruvate kinase (PYK) could react with the recovered sera from Pasteurella multocida C51-17 strain.The results of immunoprotection test showed that PGI,aldolase (ALD),GPD,PGK,phosphoglycerate mutase (PGM) and enolase (ENO) had some protective effects.In conclusion,the results of this study showed that some members of the Pasteurella glycolytic enzymes had a certain degree of immune protection,which provided a new basis for the prevention and control of pasteurellosis.

Key words: pasteurellosis; Pasteurella multocida; glycolytic enzyme; protective antigen; subunit vaccine

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