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Innate immune sensing of Z-nucleic acids by ZBP1-RIPK1 axis drives neuroinflammation in Alzheimer's disease

1 week 4 days ago
Neuroinflammation drives Alzheimer's disease (AD) pathogenesis. Z-DNA, a non-canonical left-handed DNA structure, activates innate immune signaling through Z-DNA-binding protein 1 (ZBP1). However, the functional significance of ZBP1-mediated Z-DNA detection in AD remains undefined. Here, we found that ZBP1 is amplified in AD microglia, driving innate immune responses and neuroinflammation through sensing Z-form mitochondrial DNA (mtDNA). We show that oxidized mtDNA, generated by amyloid-β...
Ziwen Song

Tailoring the biomarkers of Alzheimer's disease using a gut microbiome-centric approach: Preclinical, clinical, and regulatory perspectives

1 week 4 days ago
Alzheimer's disease (AD), a progressive neurodegenerative disorder, poses significant therapeutic challenges due to its complex etiology and limited treatment options. Traditional pharmacotherapies targeting amyloid-β (Aβ) and cholinergic pathways offer modest benefits and are often associated with adverse effects. Emerging evidence implicates gut dysbiosis and the gut-brain axis in the pathogenesis and progression of AD. This review explores the multifactorial pathophysiology of AD and...
Siya Sharma

From adaptive deep brain stimulation to adaptive circuit targeting

1 week 4 days ago
Deep brain stimulation (DBS) substantially improves motor symptoms and quality of life in people with movement disorders such as Parkinson disease and dystonia, and it is also being explored as a treatment option for other brain disorders, including treatment-resistant obsessive-compulsive disorder, Alzheimer disease and depression. Two major developments are currently driving progress in DBS research: first, the framework of adaptive DBS, which senses brain activity to infer the momentary state...
Andreas Horn

Biomarker-related phospho-tau217 appears in synapses around Abeta plaques prior to tau tangle in cerebral cortex of preclinical Alzheimer's disease

1 week 4 days ago
Phospho-tau protein p-tau181 is a cerebrospinal fluid biomarker for Alzheimer's disease (AD), while p-tau217 is the most sensitive plasma biomarker for cerebral amyloid β (Aβ) load prior to tau pathology in preclinical AD. Diagnostic and prognostic use of these p-tau biomarkers requires neuropathological interpretation. Here, we analyzed the cellular localization of biomarker p-tau species in postmortem human brains harboring different extents of Aβ plaque and tau pathology. Signals for p-tau217...
Yu Hirota

TREM2 mediates parkinsonism-like neurodegeneration in carbon disulfide-induced neurotoxicity

1 week 4 days ago
Parkinson's disease (PD) is a neurodegenerative disorder characterized by progressive loss of dopaminergic neurons and aggregation of α-Synuclein (α-Syn). While both genetic and environmental factors are implicated in PD pathogenesis, the mechanisms underlying neurodegeneration induced by environmental toxins and associated genetic responses remain largely unknown. Recently, triggering receptor expressed on myeloid cells 2 (TREM2) has been proven to be a critical mediator of toxin-induced motor...
Liu Zhidan

PICALM Alzheimer's risk allele causes aberrant lipid droplets in microglia

1 week 4 days ago
Despite genome-wide association studies (GWAS) of late-onset Alzheimer's disease (LOAD) having identified many genetic risk loci^(1-3), the underlying disease mechanisms remain largely unclear. Determining causal disease variants and their LOAD-relevant cellular phenotypes has been a challenge. Here, using our approach for identifying functional GWAS risk variants showing allele-specific open chromatin, we systematically identified putative causal LOAD-risk variants in human induced pluripotent...
Alena Kozlova

Deep aging clocks: AI-powered strategies for biological age estimation

1 week 4 days ago
Several strategies have emerged lately in response to the rapid increase in the aging population to enhance health and life span and manage aging challenges. Developing such strategies is imperative and requires an assessment of biological aging. Several aging clocks have recently been developed to measure biological aging and to assess the efficacy of longevity interventions. Biological age better reflects a person's actual age and is closely associated with health outcomes and time to...
Luma Srour

ScisTree2 enables large-scale inference of cell lineage trees and genotype calling using efficient local search

1 week 4 days ago
In a multicellular organism, cell lineages share a common evolutionary history. Knowing this history can facilitate the study of development, aging, and cancer. Cell lineage trees represent the evolutionary history of cells sampled from an organism. Recent developments in single-cell sequencing have greatly facilitated the inference of cell lineage trees. However, single-cell data are sparse and noisy, and the size of single-cell data is increasing rapidly. Accurate inference of cell lineage...
Haotian Zhang

Single-cell transcriptomic and genomic changes in the ageing human brain

1 week 4 days ago
Over time, cells in the brain and in the body accumulate damage, which contributes to the ageing process¹. In the human brain, the prefrontal cortex undergoes age-related changes that can affect cognitive functioning later in life². Here, using single-nucleus RNA sequencing (snRNA-seq), single-cell whole-genome sequencing (scWGS) and spatial transcriptomics, we identify gene-expression and genomic changes in the human prefrontal cortex across lifespan, from infancy to centenarian. snRNA-seq...
Ailsa M Jeffries