Proteomic analysis of human brain identifies α-enolase as a novel autoantigen in Hashimoto's encephalopathy

Hirofumi Ochi, Izumi Horiuchi, Norie Araki, Tosifusa Toda, Tomohiro Araki, Kaori Sato, Hiroyuki Murai, Manabu Osoegawa, Takeshi Yamada, Ken Okamura, Tomoaki Ogino, Kiyohisa Mizumoto, Hirohumi Yamashita, Hideyuki Saya, Jun ichi Kira

研究成果: Article査読

116 被引用数 (Scopus)


Hashimoto's encephalopathy (HE) is a rare autoimmune disease associated with Hashimoto's thyroiditis (HT). To identify the HE-related autoantigens, we developed a human brain proteome map using two-dimensional electrophoresis and applied it to the immuno-screening of brain proteins that react with autoantibodies in HE patients. After sequential MALDI-TOF-MASS analysis, immuno-positive spots of 48 kDa (pI 7.3-7.8) detected from HE patient sera were identified as a novel autoimmuno-antigen, α-enolase, harboring several modifications. Specific high reactivities against human α-enolase were significant in HE patients with excellent corticosteroid sensitivity, whereas the patients with fair or poor sensitivity to the corticosteroid treatment showed less reactivities than cut-off level. Although a few HT patients showed faint reactions to α-enolase, 95% of HT patients, patients with other neurological disorders, and healthy subjects tested were all negative. These results suggest that the detection of anti-α-enolase antibody is useful for defining HE-related pathology, and this proteomic strategy is a powerful method for identifying autoantigens of various central nervous system diseases with unknown autoimmune etiologies.

ジャーナルFEBS Letters
出版ステータスPublished - 2002 9月 25

ASJC Scopus subject areas

  • 生物理学
  • 構造生物学
  • 生化学
  • 分子生物学
  • 遺伝学
  • 細胞生物学


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