Reduction of amyloid β-peptide accumulation in Tg2576 transgenic mice by oral vaccination

Rika Ishii-Katsuno, Akiko Nakajima, Taro Katsuno, Jun Nojima, Eugene Futai, Noboru Sasagawa, Taiji Yoshida, Yuichiro Watanabe, Shoichi Ishiura

研究成果: Article査読

15 被引用数 (Scopus)


Alzheimer's disease (AD) is pathologically characterized by the presence of extracellular senile plaques and intracellular neurofibrillary tangles. Amyloid β-peptide (Aβ) is the main component of senile plaques, and the pathological load of Aβ in the brain has been shown to be a marker of the severity of AD. Aβ is produced from the amyloid precursor protein by membrane proteases and is known to aggregate. Recently, immune-mediated cerebral clearance of Aβ has been studied extensively as potential therapeutic strategy. In previous studies that used a purified Aβ challenge in a mouse model of AD, symptomatic improvement was reported. However, a clinical Alzheimer's vaccine trial in the United States was stopped because of severe side effects. Immunization with the strong adjuvant used in these trials might have activated an inflammatory Th1 response. In this study, to establish a novel, safer, lower-cost therapy for AD, we tested an oral vaccination in a wild-type and a transgenic mouse model of AD administered via green pepper leaves expressing GFP-Aβ Anti-Aβ antibodies were effectively induced after oral immunization. We examined the immunological effects in detail and identified no inflammatory reactions. Furthermore, we demonstrated a reduction of Aβ in the immunized AD-model mice. These results suggest this edible vehicle for Aβ vaccination has a potential clinical application in the treatment of AD.

ジャーナルBiochemical and biophysical research communications
出版ステータスPublished - 2010 9月

ASJC Scopus subject areas

  • 生物理学
  • 生化学
  • 分子生物学
  • 細胞生物学


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