Global Genetics Symposium Starts Today
Three weeks of on-demand seminars to culminate in live Q&A.
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Does Second X Chromosome Boost Women’s Resilience Against Alzheimer’s?
In female mice it’s the other X chromosome, not lack of a Y, that extends life and preserves memory in the face of amyloidosis. A histone demethylase gene partly explains this. It protects people, too.
Molecular Structure of LRRK2 Gives Clues to Parkinson’s
The first high-resolution look at LRRK2 implies that pathogenic mutations increase binding to microtubules by biasing the kinase domain toward a closed, active conformation.
In ALS and FTD, Two Different Routes to TDP-43 Aggregation
A C9ORF72 polydipeptide repeat induces aggregation by direct interaction with TDP-43, while progranulin mutations that trigger microglial toxicity cause TDP-43 to accumulate via complement.
Mutation in the Parkinson’s Gene DJ-1 Derails Splicing
Restoring proper gene editing assuaged mitochondrial defects in patient-derived neurons and organoids. Splicing errors may underlie other PD cases as well.
IFITM3 Forges Link Between Neuroinflammation and Aβ Production
The antiviral protein enhances γ-secretase processing of APP. More of it is present in Alzheimer’s disease.
In Preclinical Alzheimer’s, Learning Falters Before Memory
Learning tests may prove more informative in clinical trials of early AD. A new one claims it can spot a difference in six days.
Introducing the Coarse-Grained Plaque—A New Type of Amyloid
Comprising mostly Aβ40, these large plaques are shot through with strange tubular structures and BBB markers. They are common in early onset AD.
Nixing TMEM106b Fans the Flames of Progranulin Deficiency
Three studies agree that TMEM106b/progranulin double knockouts develop more extreme lysosomal dysfunction, inflammation, and motor deficits than PGRN KOs.
Can an Antibody Allele Boost Your Alzheimer’s Risk By Giving Herpes an Edge?
Homozygous carriers of GM17—a common IgG1 variant the HSV-1 virus has evolved to evade—had quadruple the risk of developing AD. In a small Swedish cohort, that is.
FDA Advisors Will Take up Aducanumab on November 6
The day-long advisory committee meeting will be broadcast live online. Prerecorded presentations are to be available November 4; the public can submit comments.
Virtual Meetings Try Out Different Formats
A recent genetics symposium drew positive reviews for its approach of following up prerecorded, on-demand talks with a live Q&A session.
Could Contaminated Scalpels Seed Amyloidosis?
A panel of experts concludes the evidence for this scary prospect is weak, but recommends neurosurgeons use separate neurosurgical instruments for young and old patients. The experts called for further studies.
CPTX—A Synaptic “Glue” Restores Memory in Alzheimer’s Model
The designer chimera stabilizes synapses in various mouse models of neurodegenerative disease.
Of Four Aβ Antibodies, Only Aducanumab Stems Tide of Toxic Oligomers
While one anti-Aβ antibody thwarts initial seeding of fibrils, and others keep fibrils from lengthening, aducanumab prevents oligomers forming on their surface. In vitro, that is.
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