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Smallpox Subunit Vaccine Produced In Planta Confers Protection In Mice, Maxim Golovkin, Sergei Spitsin, Vyacheslav Andrianov, Yuriy Smirnov, Yuhong Xiao, Natalia Pogrebnyak, Karen Markley, Robert Brodzik, Yuri Gleba, Stuart N Isaacs, Hilary Koprowski

Department of Cancer Biology Faculty Papers

We report here the in planta production of the recombinant vaccinia virus B5 antigenic domain (pB5), an attractive component of a subunit vaccine against smallpox. The antigenic domain was expressed by using efficient transient and constitutive plant expression systems and tested by various immunization routes in two animal models. Whereas oral administration in mice or the minipig with collard-derived insoluble pB5 did not generate an anti-B5 immune response, intranasal administration of soluble pB5 led to a rise of B5-specific immunoglobulins, and parenteral immunization led to a strong anti-B5 immune response in both mice and the minipig. Mice immunized i.m. with …