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The recombinant protein combined vaccine based on the fragment C of tetanus toxin and the cross-reacting material 197

  • Applied microbial and cell physiology
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Abstract

Diphtheria and tetanus toxoids and acellular pertussis (DTaP) vaccines were widely used since 1940s. The exceptional success of childhood vaccination is undisputed. However, the anti-diphtheria and tetanus antibody will decrease with the increase of age in human body. A boosting vaccine for tetanus and diphtheria in adult is recommended by WHO. Recombinant protein vaccine has the advantages of single component and high safety, which is one of the directions to develop boosting vaccines. Therefore, in this study, we evaluated a recombinant TTc and CRM197 combination vaccine (RTCV) that uses the fragment C (TTc) of tetanus toxin and the cross-reacting material 197 (CRM197) of the diphtheria toxin mutant. Our results displayed that RTCV (composed of 10 μg/mL TTc, 20 μg/mL CRM197 antigens, and 500 μg/mL aluminum adjuvants) could induce high levels of IgG and IgG1 antibody in mice, which were similar as those induced by DTaP. These results will provide technical support for a novel boosting vaccine against diphtheria and tetanus.

Key points

We successfully expressed CRM197 protein in E. coli BL21 (DE3) using pET26b (+) vector.

The anti-TTc and anti-CRM197 antibody titer (IgG) of RTCV was similar with DTaP.

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Data availability

All data generated during this study are included in this published article.

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Funding

This work was supported by the National Natural Science Foundation of China (No. 81260070) and the Fundamental Research Funds for Key Laboratory of Drug, Screening and Deep Processing for Traditional Chinese and Tibetan Medicine of Gansu Province (No.20180808).

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Authors and Affiliations

Authors

Contributions

PC, JL, and XP designed the research; PC and XX performed the experiment; PC analyzed data and wrote the manuscript; JG, WW, SR, and AL provided ideas and revised the manuscript; all authors read and approved the final manuscript.

Corresponding author

Correspondence to Jianqiang Li.

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Ethics approval

Following the guidelines of the Animal Ethics Committee at Lanzhou University of Technology. The sampling procedures complied with the “Guidelines on Ethical Treatment of Experimental Animals” set by the Ministry of Science and Technology, China. The procedures in the present study had received prior approval from the Experimental Animal Manage Committee of Lanzhou University of Technology.

Conflict of interest

The authors declare no competing interests.

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Chai, P., Pu, X., Ge, J. et al. The recombinant protein combined vaccine based on the fragment C of tetanus toxin and the cross-reacting material 197. Appl Microbiol Biotechnol 105, 1683–1692 (2021). https://doi.org/10.1007/s00253-021-11139-8

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  • DOI: https://doi.org/10.1007/s00253-021-11139-8

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