Biospecimen Repositories for Alzheimer’s Disease

NIH NeuroBioBank (brain tissues from various neurological diseases) BrainNet Europe – 19 brain banks in 11 European countries UK Brain Banks Network Australian Brain Bank Network – accepts requests from outside Australia

View Post

Decreased HHV-6 IgG in Alzheimer’s

Investigators from Uppsala University in Sweden found that HHV-6 IgG reactivity was significantly lower in Alzheimer’s Disease patients compared to controls. The authors suggest reduced immunity may be one reason why past studies have found increased levels of HHV-6 DNA in the brains of Alzheimer’s patients compared to controls.

View Post

CXCL11 and CCL2 are specific to HHV-6B in febrile infants

Japanese investigators from Kobe University identified CXC11 as a chemokine uniquely expressed in primary HHV-6B infections. They also confirmed a previous finding that cytokine CCL2 (MCP-1) plays a role in HHV-6B primary infections. Both CXCL11 and CCL2 are expressed in several neuroinflammatory conditions including epilepsy, Alzheimer’s disease and traumatic brain injury.

Elevated levels of HHV-6 DNA in Alzheimer’s, linked to variants in antiviral genes

A group from Italy’s University of Bologna report that genetic defects in antimicrobial defense mechanisms can leave some individuals vulnerable to sub-clinical infections that lead to cognitive decline as they age. They found variations in specific antiviral genes that correlate with HHV-6 DNA levels in brain tissue and blood from patients with Alzheimer’s disease.