health
After decades of failed attempts, drugs approved starting in 2023 became the first to modestly slow Alzheimer's by clearing a sticky protein from the brain.
These new Alzheimer's drugs target amyloid-beta plaques, sticky protein clumps that build up in the brains of people with the disease, and by clearing these plaques out with antibody-based treatments, the drugs became the first shown to modestly slow the disease's underlying progression rather than just easing symptoms.
Collagen fibers are structural proteins found mainly in skin, bone, and connective tissue, not something implicated in Alzheimer's disease. Myelin sheaths are the fatty coating that insulates nerve fibers, and their breakdown is associated with different neurological conditions like multiple sclerosis, not Alzheimer's plaque buildup.
Drugs like lecanemab and donanemab represent a rare success after decades of failed Alzheimer's trials, but their benefit is genuinely modest, slowing decline rather than reversing it, which is why researchers describe them as an important first step rather than a cure.
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