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2004 APR 7 - (NewsRx.com & NewsRx.net) -- Microglial activation facilitates A-beta plaque removal following intracranial anti-A beta antibody administration.
According to a study from the United States, "The mechanisms by which anti-A-beta antibodies clear amyloid plaques in A-beta depositing transgenic mice are unclear. In the current study, we demonstrate that inhibition of anti-A-beta antibody-induced microglial activation with anti-inflammatory drugs, such as dexamethasone, inhibits removal of fibrillar amyloid deposits. We also show that anti-A-beta F(ab')[subscript]2 fragments fail to activate microglia and are less efficient in removing fibrillar amyloid than the corresponding complete IgG."
"Diffuse A deposits are cleared by antibodies under all circumstances," reported Donna M. Wilcock and colleagues at the University of South Florida and Rinat Neuroscience Corporation. "These data suggest that microglial activation is necessary for efficient removal of compact amyloid deposits with immunotherapy. Inhibition of this ...