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Treventis TREVENTIS™ Corporation is dedicated to treating and preventing protein misfolding diseases.

Amyloid precursor protein (APP) is often viewed in terms of amyloid-β, but new data are shifting attention to what full-...
08/27/2026

Amyloid precursor protein (APP) is often viewed in terms of amyloid-β, but new data are shifting attention to what full-length APP may normally do in cells.

Researchers examined cultured cells, mouse models, and human Alzheimer’s disease (AD) brain tissue to test whether APP helps cells respond to genomic stress. Loss of APP led to the buildup of nuclear-derived waste, abnormal nuclear morphology, inflammation, and cell death, while APP overexpression reduced these effects. Mechanistically, APP supported lysosomal exocytosis, enabling cells to release harmful nuclear debris. Familial AD-associated APP mutations failed to perform this protective clearance function. Human AD brain tissue also showed accumulation of cytoplasmic nuclear waste and lower APP levels per neuron. APP dysfunction may contribute to neurodegeneration not only through amyloid-β production, but also by impairing nuclear waste clearance and cellular cleanup.

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https://www.pnas.org/doi/10.1073/pnas.2524190123

08/24/2026

Tau pathology is far more than just a biomarker of neurodegeneration.

A recent study builds on this idea, suggesting that tau aggregates may help trigger a cell death pathway linked to cognitive decline. Using the PS19 tau-transgenic mouse model, researchers found that tau-expressing neurons can die through activation of Z-DNA-binding protein 1 (ZBP1). The trigger appears to be endogenous Z-RNAs generated when normally silenced transposable elements are reactivated. Mechanistically, tau aggregates bind strongly to H3K9me3-modified chromatin, disrupting heterochromatin organization and weakening repression of these genetic elements. In Alzheimer’s disease tissue, higher ZBP1 expression in excitatory neurons was inversely associated with cognitive performance. Partial reduction of Zbp1 also improved cognitive deficits in aged tau-transgenic mice.

These findings identify ZBP1-linked neuronal death as a potential therapeutic target in tau-driven neurodegeneration.

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https://www.nature.com/articles/s41593-026-02299-9

Multiple system atrophy (MSA) and Parkinson’s disease (PD) can appear clinically similar; however, new data suggest they...
08/20/2026

Multiple system atrophy (MSA) and Parkinson’s disease (PD) can appear clinically similar; however, new data suggest they may diverge at the cellular level.

Researchers used single-nucleus RNA sequencing to analyze postmortem striatal tissue from 7 MSA cases, 12 PD cases, and 10 healthy controls. Neurons and oligodendroglia were broadly comparable between MSA and PD; however, astroglial, and microglial populations differed. PD tissue showed more MHC class II-expressing microglia, consistent with a proinflammatory profile, and more homeostatic astrocytes. MSA tissue also showed fewer activated microglia but more reactive astrocytes, with signs of impaired oligodendrocyte communication as well as tolerant or exhausted microglia. Patient CSF also reduced phagocytosis in iPSC-derived microglia, especially in MSA.

These findings point to dysfunctional immune activity as one possible contributor to MSA’s more aggressive disease course.

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https://www.nature.com/articles/s41467-026-71525-6

Not all ALS pathology follows the same route through the nervous system from patient to patient.A recent study explored ...
08/17/2026

Not all ALS pathology follows the same route through the nervous system from patient to patient.

A recent study explored one factor that may help explain why. Researchers analyzed 145 autopsy-confirmed cases of sporadic ALS to determine whether APOE ε4 influences the anatomical spread of TDP-43 pathology. They compared cases in which TDP-43 remained largely confined to motor regions with cases showing broader cortical involvement. APOE genotyping, exome sequencing, and neuropathologic assessment of amyloid-β and tau helped clarify whether this pattern was linked to Alzheimer’s disease-related pathology or ALS-associated genetic variants. APOE ε4 carriers were more likely to show widespread cortical TDP-43 pathology, and modeling suggested this relationship was independent of amyloid-β and tau. Rare ALS gene variants did not clearly affect the TDP-43 subtype, suggesting that APOE ε4 may contribute to biological heterogeneity in ALS and support more precise, subtype-based research.

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https://link.springer.com/article/10.1007/s00401-026-03029-y

GRK2 is typically associated with receptor signaling and cell survival; however, a recent study links an altered form of...
08/13/2026

GRK2 is typically associated with receptor signaling and cell survival; however, a recent study links an altered form of the protein to the biology of Alzheimer’s disease (AD).

Researchers found increased aggregates of serine-670-phosphorylated GRK2 in AD mouse models and in brains from patients with dementia, likely due to AD. Amyloid-β and hyperphosphorylated tau promoted the aggregation of phospho-S670-GRK2. Once aggregated, this altered GRK2 was associated with TOMM6 aggregation, mitochondrial dysfunction, and increased amyloid-β pathology, connecting protein aggregation to impaired cellular energy regulation. Experimental GRK2 inactivation reproduced neuropathologic features, while restoring monomeric GRK2 and promoting degradation of phospho-S670-GRK2 with small molecules reduced AD-like pathology, neuronal loss, and mortality in model systems.

These findings suggest pathological GRK2 aggregation may contribute to neurodegeneration and offer a potential therapeutic target.

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https://www.cell.com/cell-reports-medicine/fulltext/S2666-3791(26)00124-2?_returnURL=https%3A%2F%2Flinkinghub.elsevier.com%2Fretrieve%2Fpii%2FS2666379126001242%3Fshowall%3Dtrue

Alzheimer’s disease may depend not only on amyloid-β (AB) and tau but also on how neurons respond to them.Researchers re...
08/10/2026

Alzheimer’s disease may depend not only on amyloid-β (AB) and tau but also on how neurons respond to them.

Researchers recently combined spatial transcriptomics with single-nucleus RNA sequencing in frontal cortex tissue from octogenarians with or without dementia and from cognitively intact centenarians with a similar AB burden. They identified 6 tissue domains that form a spatial continuum of pathology, transitioning from AB-linked inflammation to tau-associated cellular programs. This shift involved microglia moving from early inflammatory, plaque-induced gene programs to later antigen-presenting states, suggesting that immune-state changes may influence whether pathology progresses toward cognitive impairment. Resilience differed by age group: octogenarians without dementia lacked late microglial programs, whereas centenarians showed late activation uncoupled from tau accumulation, suggesting that microglial transitions at the AB-tau interface may help explain cognitive resilience.

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https://www.nature.com/articles/s41591-026-04393-8

Brain waste clearance may be more organized than current standard tracer studies suggest.Researchers have recently devel...
08/06/2026

Brain waste clearance may be more organized than current standard tracer studies suggest.

Researchers have recently developed a noninvasive genetic system to track neuron-derived proteins as they move from brain tissue into cerebrospinal fluid and border regions. The method revealed drainage routes and border hotspots missed by conventional CSF tracer injection. Clearance varied by site: skull outflow was slow, whereas dural and nasal routes cleared more quickly. The study also found border immune cells sampling neuronal antigens, including tolerogenic skull-resident B cells. Region-specific tracing showed a “nearest exit” pattern shaped by anatomy. Disease disrupted clearance in different ways: inflammation promoted vascular leakage into the blood, whereas amyloid pathology caused protein retention and blocked exit from the border.

These findings refine the understanding of how clearance pathways and immune niches may contribute to regional vulnerability in neurologic disease.

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https://www.cell.com/cell/fulltext/S0092-8674(26)00515-5

Amyloid positron emission tomography (PET) can clarify whether cognitive impairment is linked to Alzheimer’s biology.How...
08/03/2026

Amyloid positron emission tomography (PET) can clarify whether cognitive impairment is linked to Alzheimer’s biology.

However, a recent study shows that positivity rates are not evenly distributed across populations. Researchers analyzed 5,757 Medicare beneficiaries with cognitive impairment, including Black, Latinx, and other racial or ethnic groups, to examine amyloid PET results and social determinants of health. Black and Latinx participants had lower odds of amyloid positivity than the comparison group, while individuals in more deprived Area Deprivation Index categories had higher odds than those in more prosperous areas. Social determinants did not fully explain the ethnoracial differences in amyloid PET positivity.

These findings matter as anti-amyloid therapies become more relevant, because cognitive decline in some patients may involve non-amyloid pathways that require different diagnostic and therapeutic strategies.

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https://alz-journals.onlinelibrary.wiley.com/doi/10.1002/alz.71406

Transposable elements (TEs) are slowly attracting attention in the field of brain aging.A recent study asked whether RNA...
07/30/2026

Transposable elements (TEs) are slowly attracting attention in the field of brain aging.

A recent study asked whether RNA activity varies across species and in neurodegenerative disease. Researchers quantified TE small and large RNAs in postmortem human and mouse brains from aging individuals and from individuals with Huntington’s and Parkinson’s diseases (PD). Human BrainSpan data showed age-related shifts in TE small RNA profiles, especially in the frontal cortex, where sense TE small RNAs were negatively correlated with TE large RNAs, suggesting regulatory effects. Aging mouse brains showed the expected mRNA changes; however, no clear TE RNA shifts were observed. Disease patterns diverged: Huntington’s disease showed TE small RNA dysregulation, whereas PD had stronger effects on TE large RNAs. Reduced TRIM28 in adult human brains may also help explain these changes.

These findings suggest that TE RNA regulation may be more human-specific than mouse models alone can capture.

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https://genome.cshlp.org/content/36/6/1125

Brain asymmetry may offer a new window into Alzheimer’s disease (AD) progression before and after symptoms emerge.Resear...
07/27/2026

Brain asymmetry may offer a new window into Alzheimer’s disease (AD) progression before and after symptoms emerge.

Researchers recently evaluated cortical thickness asymmetry in autosomal dominant AD using MRI data from the Clinic Barcelona cohort and a larger confirmatory cohort from the Dominantly Inherited Alzheimer Network. The cortical asymmetry index distinguished mutation carriers from healthy controls, including asymptomatic carriers in the Barcelona cohort and symptomatic carriers in both cohorts. Higher asymmetry was associated with closer proximity to expected symptom onset, lower MMSE scores, and higher neurofilament light levels in plasma or cerebrospinal fluid. Longitudinally, asymmetry increased in symptomatic mutation carriers, suggesting cortical asymmetry may reflect evolving neurodegeneration across the inherited AD continuum.

These findings indicate that cortical asymmetry may help detect and monitor disease-related neuroanatomical changes in inherited AD.

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https://academic.oup.com/braincomms/article/8/1/fcaf488/8384451?login=false

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