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Function and glycosylation of plant-derived antiviral monoclonal antibody.

Plant genetic engineering led to the production of plant-derived mAb (mAbP), which provides a safe and economically feasible alternative to the current methods of antibody production in animal systems. In this study, the heavy and light chains of human anti-rabies mAb were expressed and assembled in planta under the control of two strong constitutive promoters. An alfalfa mosaic virus untranslated leader sequence and Lys-Asp-Glu-Leu (KDEL) endoplasmic reticulum retention signal were linked at the N and C terminus of the heavy chain, respectively. mAbP was as effective at neutralizing the activity of the rabies virus as the mammalian-derived antibody (mAbM) or human rabies Ig (HRIG). The mAbP contained mainly oligomannose type N-glycans (90%) and had no potentially antigenic alpha(1,3)-linked fucose residues. mAbP had a shorter half-life than mAbM. The mAbP was as efficient as HRIG for post-exposure prophylaxis against rabies virus in hamsters, indicating that differences in N-glycosylation do not affect the efficacy of the antibody in this model.[1]

References

  1. Function and glycosylation of plant-derived antiviral monoclonal antibody. Ko, K., Tekoah, Y., Rudd, P.M., Harvey, D.J., Dwek, R.A., Spitsin, S., Hanlon, C.A., Rupprecht, C., Dietzschold, B., Golovkin, M., Koprowski, H. Proc. Natl. Acad. Sci. U.S.A. (2003) [Pubmed]
 
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