Increased T cell reactivity to amyloid β protein in older humans and patients with Alzheimer disease

Alon Monsonego, Victor Zota, Arnon Karni, Jeffery I. Krieger, Amit Bar-Or, Gal Bitan, Andrew E. Budson, Reisa Sperling, Dennis J. Selkoe, Howard L. Weiner

Research output: Contribution to journalArticlepeer-review

319 Scopus citations


Alzheimer disease (AD) is characterized by the progressive deposition of the 42-residue amyloid β protein (Aβ) in brain regions serving memory and cognition. In animal models of AD, immunization with Aβ results in the clearance of Aβ deposits from the brain. However, a trial of vaccination with synthetic human Aβ1-42 in AD resulted in the development of meningoencephalitis in some patients. We measured cellular immune responses to Aβ in middle-aged and elderly healthy subjects and in patients with AD. A significantly higher proportion of healthy elderly subjects and patients with AD had strong Aβ-reactive T cell responses than occurred in middle-aged adults. The immunodominant Aβ epitopes in humans resided in amino acids 16-33. Epitope mapping enabled the identification of MHC/T cell receptor (TCR) contact residues. The occurrence of intrinsic T cell reactivity to the self-antigen Aβ in humans has implications for the design of Aβ vaccines, may itself be linked to AD susceptibility and course, and appears to be associated with the aging process.

Original languageEnglish
Pages (from-to)415-422
Number of pages8
JournalJournal of Clinical Investigation
Issue number3
StatePublished - 1 Aug 2003
Externally publishedYes

ASJC Scopus subject areas

  • General Medicine


Dive into the research topics of 'Increased T cell reactivity to amyloid β protein in older humans and patients with Alzheimer disease'. Together they form a unique fingerprint.

Cite this