The global platform trial for Alzheimer’s due to mutations in APP or presenilin will try to treat or prevent symptoms by deploying a therapeutic antibody that homes in on a piece of tau known to aggregate into neurofibrillary tangles.
Among 14 familial Alzheimer’s APP mutations, two don’t change the Aβ42/Aβ40 ratio, but all of them yield long peptides of 45 to 49 residues that hide out in the membrane.
Comprising mostly Aβ40, these large plaques are shot through with strange tubular structures and BBB markers. They are common in early onset AD.
Umbilical cord stem cells from presenilin 1 E280A carriers, once differentiated into cholinergic-like neurons, pumped out Aβ42 and accumulated phosphorylated tau and apoptotic markers.
Loss-of-function variants in the demethylase TET2 raise a person’s risk for early and late-onset Alzheimer’s, as well as FTD and ALS, suggesting a common mechanism.
The AAT-AD/PD conference hosted a virtual conversation about what the trial’s disappointing cognitive and tantalizing biomarker data might mean. Hidden between thank you’s and pledges to stay committed were substantive points of debate and context.
Data shown at AAT-AD/PD explain why the DIAN-TU trial missed its primary endpoint. But gantenerumab strongly reduced plaques, tau, phospho-tau, and slowed NfL. This result prompted an open-label extension, sustaining hope for efficacy.
Different forms of p-tau in cerebrospinal fluid reflect worsening plaque load, metabolism, and atrophy in the brain. They could help stage Alzheimer’s disease.
DIAN, Roche, Lilly disclose that neither gantenerumab nor solanezumab slowed cognitive decline in the first-pass comparison of drug and placebo groups. Analyses are ongoing; dose may have been too low.
In early Alzheimer’s disease, the pattern of tau deposition also strongly predicts areas destined for subsequent degeneration.
In 2,144 Colombian ADAD family members, plasma NfL in gene carriers rises as early as two decades before their symptoms start.
At AAIC, researchers presented baseline data from an ongoing, five-year study asking whether the anti-Aβ antibody crenezumab can forestall cognitive decline in autosomal-dominant Alzheimer’s disease.
A brother’s survival guilt, a journalist tracing her mutation to Lebanon, a student freezing her eggs ahead of a primary prevention trial—DIAN family members are stirring their growing community to act against Alzheimer’s disease.
Scientists link this mysterious form of dementia to higher plasma LDL-cholesterol, and to genetic variants in APOB, which encodes the major component of low-density lipoprotein.
Presented at AD/PD, the discovery by scientists in Uppsala is the first APP deletion found to cause Alzheimer’s disease. The same group found the Swedish and Arctic APP mutations.