alexa Immunogenicity of Brugia malayi Abundant Larval Transcript-2, a potential filarial vaccine candidate expressed in tobacco.
Medicine

Medicine

Advanced Techniques in Biology & Medicine

Author(s): Ganapathy M, Perumal A, Mohan C, Palaniswamy H, Perumal K

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Abstract KEY MESSAGE: Transgenic tobacco plants with Bm ALT-2, a filarial vaccine candidate, were developed. The plant-produced antigen showed immunogenicity on par with the E.coli product. Transgenic tobacco plants were developed using Brugia malayi Abundant Larval Transcript-2 (Bm ALT-2), a major antigen produced from recombinant E.coli found to be experimentally successful as potential vaccine candidate against lymphatic filariasis. Results of experiments on the transformation and expression of the Bm ALT-2 in tobacco plant to produce plant-based vaccine are presented here. We have successfully transformed the tobacco plant with Bm ALT-2 and confirmed that the plants expressed the filarial protein by PCR analysis and Western blotting. The level of expression varied from 50 to 90 ng/μg of total soluble protein for ALT-2. Immunization of mice with plant-extracted protein indicated that the plant-produced protein had immunological characteristics similar to the E.coli-produced protein. Antibody titres produced by plant-produced recombinant ALT 2-immunized mice were on par with those immunized with recombinant protein produced by E.coli. Antibody isotype assay showed that plant-produced recombinant ALT-2 induced significant IgG1, whereas E.coli-produced recombinant ALT-2 induced IgG3. This result is a step forward towards the development of a model eukaryotic system for the production of recombinant filarial proteins, which can be utilized to produce therapeutic and diagnostic molecules against lymphatic filariasis, a neglected tropical infectious disease which has a negative impact on socioeconomic development. In addition, this is the first report of the immunogenicity of a plant-derived filarial antigen. This article was published in Plant Cell Rep and referenced in Advanced Techniques in Biology & Medicine

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