Picornavirus Identified in Alzheimer's Disease Brains: A Pathogenic Path?

JAD Reports
Bo NiklassonElisabet Englund


We investigated formalin-fixed postmortem brain tissue from the hippocampus region of 18 AD cases and 11 age-matched controls using a polyclonal antibody against Ljungan virus (LV) capsid protein 1. Evidence of a LV antigen was found in all AD cases but in none of the control specimens (p < 0.0001). The antibodies reacted with neurons and astrocytes and also showed distinct positive reaction in the amyloid/neuritic plaques. The possible role of an incompletely characterized picornavirus as the etiologic agent in AD open up the possibility of treatment with antiviral therapy directed against picornaviruses. The positive result of such treatment in a small number of patients is presented separately back to back to this report.


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