Abstract
The alpha-toxin is one of the virulence factors of Clostridium perfringens for gas gangrene in humans and animals or necrotic enteritis in poultry. The C-terminal domain of this toxin ( cpa 247-370 ) was synthesized and cloned into pT1NX vector to construct the pT1NX-alpha plasmid. This surface-expressing plasmid was electroporated into Lactobacillus casei ATCC 393, generating the recombinant L. casei strain expressing alpha-toxoid (LC-α strain). Expression of this modified alpha-toxoid was confirmed by SDS-PAGE, immunoblotting, and direct immunofluorescence microscopy. BALB/c mice, immunized orally by the recombinant LC-α strain, elicited mucosal and significantly humoral immune responses (p < 0.05) and developed a protection against 900 MLD/mL of the standard alpha-toxin. This study showed that this recombinant LC-α strain could be a promising vaccine candidate against gas gangrene and necrotic enteritis.
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This work was supported by a grant from Iran National Science Foundation (INSF) under grant number 920238680.
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Mojtaba Alimolaei performed the entire experiments and data analysis and wrote the manuscript. Mehdi Golchin supervised experiments and manuscript writing. Jalil Abshenas collaborated in working with the laboratory animals. Mehrdad Shamsaddini-Bafti collaborated in the challenge test. Majid Ezatkhah contributed to the scientific discussion.
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The study was approved by the Animal Experimentation Ethics Committee of Kerman University of Medical Sciences (Code: 92023868/92/11/07).
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The authors declare that they have no conflict of interest.
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Alimolaei, M., Golchin, M., Abshenas, J. et al. A Recombinant Probiotic, Lactobacillus casei, Expressing the Clostridium perfringens α-toxoid, as an Orally Vaccine Candidate Against Gas Gangrene and Necrotic Enteritis. Probiotics & Antimicro. Prot. 10, 251–257 (2018). https://doi.org/10.1007/s12602-017-9276-8
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DOI: https://doi.org/10.1007/s12602-017-9276-8