1. Efficacy of anti-Abeta antibody isotypes used for intracerebroventricular immunization in TgCRND8.
- Author
-
Chauhan NB and Siegel GJ
- Subjects
- Alzheimer Disease immunology, Alzheimer Vaccines, Amyloid beta-Peptides metabolism, Amyloid beta-Protein Precursor genetics, Amyloid beta-Protein Precursor immunology, Amyloid beta-Protein Precursor metabolism, Animals, Brain anatomy & histology, Brain metabolism, Densitometry methods, Disease Models, Animal, Immunohistochemistry methods, Inflammation chemically induced, Kidney pathology, Lipopolysaccharides, Liver pathology, Mice, Mice, Inbred C57BL, Mice, Transgenic, Spleen pathology, Staining and Labeling methods, Alzheimer Disease prevention & control, Amyloid beta-Peptides immunology, Antibodies, Anti-Idiotypic administration & dosage, Immunoglobulin Isotypes administration & dosage, Injections, Intraventricular methods, Plaque, Amyloid metabolism
- Abstract
We have previously demonstrated that intracerebroventricular (ICV) injection of anti-Abeta (IgG1, kappa against the 1-28 region of Abeta) reduced cerebral amyloid plaques by 50% after 1 month without producing hemorrhage or activating IL-1beta responses in Tg2576 brain [N.B. Chauhan, G.J. Siegel, Reversal of amyloid beta toxicity in Alzheimer's disease model Tg2576 by intraventricular antiamyloid beta antibody, J. Neurosci. Res. 69 (1) (2002) 10-23]. The current report compares the efficacy of IgG1, IgG2a and IgG2b isotypes of anti-Abeta against several different epitopes of Abeta in clearing cerebral Abeta after a single bolus ICV injection in TgCRND8. Consistent with earlier in vitro findings from other laboratories, these in vivo data demonstrate that all IgG1 isotype antibodies tested cleared cerebral Abeta more efficiently than did IgG2a and IgG2b antibodies without producing histotoxicity in brain, liver or kidney, while an antibody against the C-terminus of Abeta did not reduce plaques or diminish their accumulation with aging of the animals. Intriguingly, there was no significant difference between the Abeta-reducing efficiency of IgG1 anti-Abeta antibodies directed against residues 3-6, against residues 1-10 or against residues 1-28 of N-terminus Abeta.
- Published
- 2005
- Full Text
- View/download PDF