Details

Autor(en) / Beteiligte

• Arevalo-Villalobos, Jaime I.
• Govea-Alonso, Dania O.
• Bañuelos-Hernández, Bernardo
• González-Ortega, Omar
• Zarazúa, Sergio
• Rosales-Mendoza, Sergio

Titel

Inducible expression of antigens in plants: a study focused on peptides related to multiple sclerosis immunotherapy

Ist Teil von

• Journal of biotechnology, 2020-07, Vol.318, p.51-56

Ort / Verlag

Netherlands: Elsevier B.V

Erscheinungsjahr

2020

Quelle

MEDLINE

Beschreibungen/Notizen

• •The lack of effective treatments for multiple sclerosis demands new developments•Immunotherapy with the BV5S2, BV6S5, and BV13S1 peptides is a promising approach•Such peptides were produced in plants as an attractive host for vaccine development•An inducible expression system allowed the expression of the target peptides•The plant-made peptides induced humoral responses in orally immunized mice Multiple sclerosis (MS) affects 2.3 million patients worldwide with no effective treatments available thus far. Depletion of autoreactive T-cells is considered the basis for immunotherapeutic approaches. For this purpose the peptides BV5S2, BV6S5, and BV13S1 have been identified as candidates for the development of a MS vaccine. Herein, the plant-based simultaneous production of these peptides is described as an effort to generate a new model of MS immunotherapy. A polyprotein comprising the sequence of the target peptides was designed having the picornaviral 2A sequence in between to mediate the release of the individual peptides upon translation. A codon optimized gene was cloned in vectors mediating constitutive (CaMV35S promoter) or inducible (AlcA promoter) expression. No transgenic tobacco plants were recovered from the constitutive vector suggesting toxicity of the target peptides. In contrast, several transformed lines were obtained with the inducible vector. The individual BV5S2, BV6S5, and BV13S1 peptides were detected in transformed lines upon ethanol-mediated induction and a quantitative analysis based on a OVA conjugate carrying the three peptides revealed accumulation levels up to 0.5 μg g-1 FW leaves. The plant-made peptides were able to induce humoral responses in orally immunized mice. This platform will be useful in the development of alternative immunotherapies against MS having low cost and safety as main attributes. Moreover the platform represents an attractive alternative for the expression of antigens having detrimental effects in plants.