Linear and conformation specific antibodies in aged beagles after prolonged vaccination with aggregated Abeta

Autor: Vitaly Vasilevko, Viorela Pop, Hyun Jin Kim, Tommy Saing, Charles C. Glabe, Saskia Milton, Edward G. Barrett, Carl W. Cotman, David H. Cribbs, Elizabeth Head
Jazyk: angličtina
Rok vydání: 2010
Předmět:
Zdroj: Neurobiology of Disease, Vol 39, Iss 3, Pp 301-310 (2010)
Druh dokumentu: article
ISSN: 1095-953X
DOI: 10.1016/j.nbd.2010.04.014
Popis: Previously we showed that anti-Aβ peptide immunotherapy significantly attenuated Alzheimer's-like amyloid deposition in the central nervous system of aged canines. In this report we have characterized the changes that occurred in the humoral immune response over 2.4 years in canines immunized repeatedly with aggregated Aβ1–42 (AN1792) formulated in alum adjuvant. We observed a rapid and robust induction of anti-Aβ antibody titers, which were associated with an anti-inflammatory T helper type 2 (Th2) response. The initial antibody response was against dominant linear epitope at the N-terminus region of the Aβ1–42 peptide, which is identical to the one in humans and vervet monkeys. After multiple immunizations the antibody response drifted toward the elevation of antibodies that recognized conformational epitopes of assembled forms of Aβ and other types of amyloid. Our findings indicate that prolonged immunization results in distinctive temporal changes in antibody profiles, which may be important for other experimental and clinical settings.
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