High titers of peripheral anti-Aβ antibodies do not reduce Aβ deposits in aged Tg-SwDI mice. High titers of peripheral anti-Aβ antibodies do not reduce.

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High titers of peripheral anti-Aβ antibodies do not reduce Aβ deposits in aged Tg-SwDI mice. High titers of peripheral anti-Aβ antibodies do not reduce Aβ deposits in aged Tg-SwDI mice. A, Aβ deposition was unchanged in immunized mice (bottom) when compared with untreated (top) or adjuvant-treated Tg-SwDI mice at 15 months of age in Tg-SwDI mice after 4 months of immunotherapy. Abundant diffuse amyloid deposits can be seem at low magnification and in the cortex at higher magnification. Pronounced microvessel deposition of Aβ is seen in the thalamus. Aβ deposits (anti-Aβ 6E10 staining; brown) and blood vessels (anti-collagen IV staining; pink) are shown. Scale bars: low magnification, 1 mm; high magnification, 50 μm. B, Total Aβ40 and Aβ42 are shown in the top row and insoluble Aβ and soluble Aβ in the bottom row in untreated, adjuvant-treated, and immunized (2 groups) Tg-SwDI mice remained unchanged. Data are mean ± SD of n = 5–8 mice per group. Vitaly Vasilevko et al. J. Neurosci. 2007;27:13376-13383 ©2007 by Society for Neuroscience