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Published on: July 19, 2014
by Alice Park for Time:
At the Alzheimer’s Association International Conference in Copenhagen, scientists described five trials that taking the unprecedented step of testing drugs that may prevent the onset of the neurodegenerative disease in people not yet experiencing cognitive decline.
The participants in the trial are all at high risk of developing Alzheimer’s either because they carry two copies of the ApoE4 gene, which is associated with a strong chance of developing the disease, or a genetic mutation that triggers the condition much earlier in life, during the 40s.
Most will be testing drugs that target amyloid, the protein that builds up in abnormal amounts in the brains of Alzheimer’s patients and triggers other damaging changes that affect memory and cognitive functions.
While other scientists reported some encouraging data on the effectiveness of diet, exercise, social support and controlling heart-related risk factors—see our piece about the lifestyle changes that prevented the disease—most experts believe that the best way to prevent Alzheimer’s may involve a combination of such lifestyle approaches with an effective drug.
Here’s the latest information on the five trials.
1. Dominantly Inherited Alzheimer Network Trial (DIAN TU)
Who is enrolled: People with a genetic mutation for Alzheimer’s disease or those who don’t know their genetic status but have a parent or sibling with Alzheimer’s-related mutations
When they should enroll: when they are cognitively normal or have mild cognitive impairment
Drugs tested: Two experimental drugs, gantenerumab and solanezumab, both of which are antibodies designed to bind to amyloid and prevent it from forming brain-damaging plaques
2. Anti-Amyloid Treatment in Asymptomatic Alzheimer’s Study (A4)
Who is enrolled: People aged 65 to 85 years with normal thinking and memory
When they should enroll: Any time they become age eligible
Drugs tested: Solanezumab, an experimental anti-amyloid compound
Who is enrolled: Healthy seniors
When they should enroll: When they are cognitively normal or have mild cognitive impairment
Drugs tested: The trial will first pilot a screening test for two genes to see if it can accurately predict risk of mild cognitive impairment. The next phase of the trial will test an experimental compound designed to delay symptoms of mild cognitive impairment and Alzheimer’s disease in people without symptoms.
4. Alzheimer’s Prevention Initiative Autsomal Dominant Alzheimer’s Disease Treatment Trial
Who is enrolled: 300 people from a family in Columbia affected by a genetic predisposition to developing Alzheimer’s disease early in life
When they should enroll: Before symptoms begin
Drug tested: Anti-amyloid antibody crenezumab
5. Alzheimer’s Prevention Initiative APOE4 treatment Trial
Who is enrolled: people with two copies of APOE4, who are at high risk of developing Alzheimer’s disease
When they should enroll: Before cognitive symptoms of Alzheimer’s begin
Drugs tested: An immunotherapy that prompts the body’s immune system to produce antibodies against amyloid protein, and a beta-secretase inhibitor that blocks the production of certain forms of amyloid.
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