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from the NIH National Institute on Aging, February 16, 2023
Study of green tea and other molecules uncovers new therapeutic strategy for Alzheimer’s
Researchers have discovered how a molecule found in green tea breaks apart tangles of the protein tau, a hallmark of Alzheimer’s disease. Based on this finding, the team identified other molecules that can also untangle tau and may be better drug candidates than the green tea molecule. Results from the NIA-funded study, published in Nature Communications, suggest that this approach may one day provide an effective strategy for treating Alzheimer’s.
In Alzheimer’s, tau abnormally sticks together in fibrous tangles that spread between brain cells, leading to cell death. The molecule epigallocatechin gallate (EGCG) — the one found in green tea — is known to untangle these tau fibers. However, EGCG is not on its own an effective Alzheimer’s treatment because it cannot easily penetrate the brain and binds to many proteins other than tau, weakening its effect. Therefore, researchers wanted to find molecules that replicate the effects of EGCG but have better drug properties for treating Alzheimer’s.
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