Beta Amyloid Peptide: Research Paper : Human Herpesviruses 6A and 6B in Brain Diseases: Association versus Causation

Human Herpesviruses 6A and 6B in Brain Diseases: Association versus Causation

Abstract

SUMMARYHuman herpesvirus 6A (HHV-6A) and human herpesvirus 6B (HHV-6B), collectively termed HHV-6A/B, are neurotropic viruses that permanently infect most humans from an early age. Although most people infected with these viruses appear to suffer no ill effects, the viruses are a well-established cause of encephalitis in immunocompromised patients. In this review, we summarize the evidence that the viruses may also be one trigger for febrile seizures (including febrile status epilepticus) in immunocompetent infants and children, mesial temporal lobe epilepsy, multiple sclerosis (MS), and, possibly, Alzheimer's disease. We propose criteria for linking ubiquitous infectious agents capable of producing lifelong infection to any neurologic disease, and then we examine to what extent these criteria have been met for these viruses and these diseases.

Keywords: Alzheimer's disease; febrile seizures; febrile status epilepticus; human herpesvirus 6A; human herpesvirus 6B; mesial temporal lobe epilepsy; multiple sclerosis.

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