Health, Longevity & Biohacking
ApoE4 Genotype Creates Dysfunctional Brain Cholesterol Transport Driving Alzheimer's Risk
Peter Attia Drive
#395 - Brain lipidology: understanding APOE, cholesterol homeostasis, Alzheimer's disease risk, and the effects of lipid-lowering therapies on brain health | Tom Dayspring, M.D.
"If you have the ApoE4 genotype and your astrocyte is producing ApoE4 peptides and they're what's constructed on the HDL, that's likely to be a dysfunctional HDL in the brain. The neuron is not getting the cholesterol it needs, and that will create havoc because if you don't have the proper amount of cell membrane cholesterol, that's where you start producing beta amyloid and even tau."
Dayspring explained the molecular mechanism linking ApoE4 to Alzheimer's disease. The E4 variant produces dysfunctional lipoproteins in the brain that cannot properly deliver cholesterol to neurons, disrupting cell membranes and triggering production of toxic beta amyloid and tau proteins. This represents an 8 to 12-fold increase in Alzheimer's risk for E4E4 carriers.
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Peter Attia Drive