In a published Correction , a revised analysis updated two "core transcription programs" proposed to underlie axon injury-induced retinal ganglion cell (RGC) neurodegeneration. Though extensive, the Correction purported to leave the two principal conclusions of its parent study unaltered. The first of those findings was that a core program mediated by the Activating Transcription Factor-4 (ATF4) and its likely heterodimeric partner does not include numerous canonical ATF4 target genes stimulated by RGC axon injury. The second was that the Activating Transcription Factor-3 (ATF3) and C/EBP Homologous Protein (CHOP) function with unprecedented coordination in a parallel program regulating innate immunity pathways. Here those unexpected findings are revealed to instead reflect insufficient knockout coupled with differences in RGC enrichment across conditions. This analysis expands on the published Correction's redefinition of the purported transcription programs to raise foundational questions about the proposed functions and relationships of these transcription factors in neurodegeneration.
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http://dx.doi.org/10.1101/2024.10.21.618927 | DOI Listing |
Alzheimers Dement
December 2024
Center for Neurodegenerative Disease Research, Department of Pathology and Laboratory Medicine, University of Pennsylvania, Perelman School of Medicine, Philadelphia, PA, USA.
Background: Glaucoma is characterized by progressive optic nerve degeneration that results in irreversible blindness, and it can be considered a neurodegenerative disorder of both the eye and the brain. Increasing evidence suggest that glaucoma shares some common neurodegenerative pathways with Frontotemporal Lobar Degeneration (FTLD), Amyotrophic Lateral Sclerosis (ALS), and Alzheimer's Disease (AD) among others. Interestingly, a recent study revealed the presence of abnormal TAR DNA-binding protein 43 (TDP-43) inclusions and aggregates in retinal ganglion cells and other retinal cell types in FTLD-TDP patients; however, the significance of this pathology and its impact on retinal function and optical nerve integrity is unknown.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Tohoku Medical Megabank Organization, Tohoku University, Sendai, Japan.
Background: Dementia is age-related with a significant genetic contribution, yet genome-wide association studies have not fully accounted for heritability. This discrepancy may in part be due to reliance on SNPs and small indels. Whole-genome sequencing (WGS) data in the Japanese population may reveal population-specific susceptibility loci for dementia.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
Department of Neurosurgery, Maxine Dunitz Neurosurgical Research Institute, Cedars-Sinai Medical Center, Los Angeles, CA, USA.
Background: Alzheimer's disease (AD) is the foremost cause of global dementia, also characterized by retinal changes involving Aβ, hyperphosphorylated-tau (p-tau), neuronal degeneration, and tissue atrophy. Mitochondrial-driven reactive oxygen species (ROS) production, linked to synaptic dysfunction, is common to various neurodegenerative conditions, including AD. Despite synaptic dysfunction being an early predictor of cognitive decline in AD, its occurrence in the AD retina is unexplored.
View Article and Find Full Text PDFAlzheimers Dement
December 2024
University of Southern California, San Diego, CA, USA.
Background: Individuals with Down Syndrome (DS) exhibit a unique aging profile and have early-onset Alzheimer's Disease (AD) due to a triplication of the amyloid precursor protein (APP) gene on chromosome 21.
Method: Here, we present a study of a 73-year-old non-Hispanic White female with DS who underwent extensive clinical assessments for several decades. She had a cognitive and functional impairment consistent with DS and AD-like symptoms.
Brain Commun
December 2024
Singapore Eye Research Institute, Singapore National Eye Centre, The Academia, Singapore 169856, Singapore.
Accurate and early diagnosis of Alzheimer's disease and vascular dementia is crucial for enabling timely interventions and improving patient outcomes. This study evaluates the diagnostic performance of plasma biomarkers (neurofilament light chain and phosphorylated tau181) and retinal biomarkers (retinal nerve fibre layer and ganglion cell-inner plexiform layer), individually and in combination, in differentiating moderate cognitive impairment and dementia from mild cognitive impairment and no cognitive impairment. A cross-sectional study was conducted involving 509 participants, aged 50 and older, recruited from a memory clinic.
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