Rice-based oral antibody fragment prophylaxis and therapy against rotavirus infection

Daisuke Tokuhara, Beatriz Álvarez, Mio Mejima, Tomoko Hiroiwa, Yuko Takahashi, Shiho Kurokawa, Masaharu Kuroda, Masaaki Oyama, Hiroko Kozuka-Hata, Tomonori Nochi, Hiroshi Sagara, Farah Aladin, Harold Marcotte, Leon G.J. Frenken, Miren Iturriza-Gómara, Hiroshi Kiyono, Lennart Hammarström, Yoshikazu Yuki

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67 Citations (Scopus)


Rotavirus-induced diarrhea is a life-threatening disease in immunocompromised individuals and in children in developing countries. We have developed a system for prophylaxis and therapy against rotavirus disease using transgenic rice expressing the neutralizing variable domain of a rotavirus-specific llama heavy-chain antibody fragment (MucoRice-ARP1). MucoRice-ARP1 was produced at high levels in rice seeds using an overexpression system and RNAi technology to suppress the production of major rice endogenous storage proteins. Orally administered MucoRice-ARP1 markedly decreased the viral load in immunocompetent and immunodeficient mice. The antibody retained in vitro neutralizing activity after long-term storage (>1 yr) and boiling and conferred protection in mice even after heat treatment at 94°C for 30 minutes. High-yield, watersoluble, and purification-free MucoRice-ARP1 thus forms the basis for orally administered prophylaxis and therapy against rotavirus infections.

Original languageEnglish
Pages (from-to)3829-3838
Number of pages10
JournalJournal of Clinical Investigation
Issue number9
Publication statusPublished - 2013 Sep 3
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)


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