Hallmarks of Aging Library
Every article, presentation, spotlight, and news item we've tagged to Hallmarks of Aging.
Showing 121–144 of 401
Social isolation accelerates molecular aging via epigenetic pathways
Social experiences correlate with mortality risk through measurable physiological pathways: epigenetic aging, allostatic load, and health status. This evidence demonstrates that the quality and frequency of social engagement directly influence aging rate and disease burden at the molecular level.
Differential Gene Expression in Human Hippocampus With Aging
Gene expression analysis of human hippocampal tissue reveals distinct molecular signatures in aging characterized by increased inflammation, reduced DNA repair capacity (particularly RAD23B), and altered neural activity patterns. RAD23B expression declines with age and is further reduced in Alzheimer's disease, positioning it as a relevant marker of hippocampal aging and neuronal vulnerability.
Senescent Cells Define Aggressive Endometriosis Subtype
A correction to prior research clarifies the classification of an aggressive endometriosis subtype characterized by cellular senescence and immune modulation. The findings refine understanding of how aging-related cellular changes drive pathological remodeling in endometrial tissue, with implications for stratifying disease severity and treatment response.
Myeloid cell failure links immune dysfunction to frailty
Myeloid cells—a critical component of immune defense—may lose their adaptive capacity over time, creating a state of programmed dysfunction that accelerates epigenetic aging and manifests as physical frailty. This framework suggests frailty is not simply age-related decline but a specific failure mode of immune cell plasticity that can be measured and potentially reversed.
Single-cell analysis of the human immune system reveals sex-specific dynamics of immunosenescence
Single-cell immune profiling across nearly 1,000 adults reveals sex-specific patterns of immune aging, with females demonstrating more extensive age-related remodeling of immune function. These findings establish a biological basis for observed sex differences in inflammatory disease prevalence and infection susceptibility across the lifespan.
Simultaneous spatial transcriptomics and morphology profiling as tools to explore how microglia change with age
Microglia—the brain's resident immune cells—exhibit distinct transcriptional patterns and morphological changes with age, with subcellular mRNA localization directly influencing their functional capacity. This work establishes how aging alters the molecular foundation of neuroinflammation, a process central to cognitive decline and neurodegenerative disease progression.
Correction to “Monoamine Oxidase‐A Is a Novel Driver of Stress‐Induced Premature Senescence Through Inhibition of Parkin‐Mediated Mitophagy”
This correction addresses methodological refinements in research demonstrating that monoamine oxidase-A drives stress-induced cellular aging by disrupting the cell's ability to clear damaged mitochondria. The finding clarifies a direct mechanism linking stress response dysfunction to accelerated senescence at the mitochondrial level.
Progeria Research Reveals Cardiovascular Aging Mechanisms
Progeria research has matured to the point where therapeutic strategies are moving from basic science toward clinical implementation. Understanding the molecular mechanisms driving accelerated aging in Hutchinson–Gilbert progeria syndrome offers direct insights into cardiovascular pathology and age-related tissue degeneration in the general population.
Telomere Shortening Drives Atrial Fibrillation Through VCAM‐1 Mediated Atrial Electrical and Structural Remodeling
Telomere shortening drives atrial fibrillation through VCAM-1 upregulation, which promotes atrial fibrosis and electrical dysfunction. Blocking VCAM-1 reverses these changes and reduces AF susceptibility by 30%, identifying a mechanistic pathway linking cellular aging to arrhythmia risk.
Why Complex Organisms Resist Aging Interventions
A theoretical framework explains why interventions that dramatically extend lifespan in simple organisms produce modest gains in mammals: biological complexity creates redundancy, tissue-specific effects, and compensatory feedback that limit the impact of single-pathway manipulation. This fundamental constraint shapes realistic expectations for longevity interventions across species.
Mitigating the Hawthorne effect in aging research
Observation-induced behavioral changes in aging research can produce biomarker shifts equal to or larger than the interventions being tested. This Hawthorne effect is particularly pronounced in geroscience trials and must be methodologically distinguished from genuine biological aging modulation.
Pck1 Deficiency Drives Mitochondrial Dysfunction and Cellular Senescence in Adipocytes
Pck1 deficiency in adipocytes impairs mitochondrial function, causing fumarate accumulation that triggers oxidative stress, mtDNA release, and chronic inflammation—a mechanism linking metabolic dysfunction to aging. This identifies a targetable pathway in the progression of age-related metabolic disease.
Intergenerational Transmission of Metabolic Changes in Oocytes From Aged Mice
Oxidative stress in oocytes from aged female mice triggers lipid accumulation and metabolic alterations that persist through three generations, with offspring developing compensatory antioxidant responses in lipid-rich tissues. This demonstrates that maternal aging imprints metabolic dysfunction on descendants independent of direct genetic mutation.
Architect of Frailty Biology and Champion of Translational Geroscience
Jeremy Walston's work established frailty as a biologically coherent condition rooted in chronic inflammation, mitochondrial dysfunction, and impaired stress responsiveness rather than inevitable aging. His translational research framework has advanced clinical intervention strategies and shaped how geroscience addresses loss of physiologic reserve across aging populations.
A Cluster of Three snoRNAs Including Jouvence Required in the Gut Determines Lifespan and Confers Neuroprotection Through Metabolic Parameters
A cluster of three small nucleolar RNAs in the gut epithelium regulates lipid and sterol metabolism, with direct effects on lifespan and neuroprotection in aging. Disruption of these snoRNAs causes metabolic dysregulation that leads to neurodegeneration, while restoration in gut cells alone is sufficient to reverse these effects.
Mitorubin, berberrubine-based compounds that improve mitochondrial function, exhibit cardioprotective effects against age-related cardiac dysfunction
Mitorubin, a berberrubine-derived compound, restores mitochondrial function and protects cardiac tissue from age-related deterioration. This addresses a primary mechanism of cardiovascular aging by targeting energy production capacity at the cellular level.
Senescence‐Driven IL‐17A Inflammatory Circuit Promotes Epithelial–Mesenchymal Transition (EMT) and Progression in Age‐Related Posterior Subcapsular Cataracts
Senescent lens epithelial cells drive posterior subcapsular cataracts through an IL-17A inflammatory loop that activates NF-κB signaling, triggering epithelial-mesenchymal transition and accelerated tissue remodeling. This positions age-related cataracts as a senescence-driven pathology rather than a protein aggregation problem, with implications for understanding how cellular aging propagates through tissues.
Mitochondrial Function Drives Bimodal Breast Aging Patterns
Breast tissue ages along distinct patterns controlled by mitochondrial function, with some individuals experiencing episodic windows of vulnerability at ages 45 and 65 rather than gradual decline. This bimodal aging signature aligns with the observed peaks in human breast cancer incidence and suggests tissue-level aging trajectories may explain age-related disease distribution.
Infection-Triggered Neuroinflammation Links Acute Illness to Dementia
Severe infections predict subsequent dementia risk independent of frailty or comorbidity burden, suggesting infection-related neuroinflammation may trigger lasting cognitive decline. This connection identifies a modifiable pathway in dementia prevention that operates through acute immune activation rather than baseline health status alone.
HCCaging: a liver physiological aging-related biomarker for hepatocellular carcinoma diagnosis based on transcriptome data
Researchers identified HCCaging, a transcriptome-based biomarker that reflects liver aging patterns and improves hepatocellular carcinoma diagnosis. This tool bridges the gap between cellular aging processes and cancer risk stratification, offering earlier detection potential before advanced disease.
Gut Bacteria Might Affect Cognition via the Vagus Nerve
Age-related cognitive decline involves microbiome remodeling, with Parabacteroides goldsteinii identified as a primary driver that suppresses neuronal activation in the hippocampus via the vagus nerve. Antibiotic treatment reverses the cognitive deficit even after it develops, establishing the microbiome as a modifiable mechanism rather than an irreversible consequence of aging.
Age‐Associated Impairment of Paneth Cells Driven by microRNA‐152 Promotes Intestinal Epithelial Vulnerability to Pathological Stress
Aging drives dysregulation of microRNA-152 in the small intestine, which impairs Paneth cells by suppressing mitochondrial function—specifically through reduced expression of Prohibitin1. This mechanism directly compromises intestinal barrier integrity and increases vulnerability to infection and injury in older adults.
Cilia Suppression Reverses Gum Senescence via AKT Activation
Primary cilia accumulation in aged gingival tissue drives fibroblast senescence and periodontal inflammation. Suppressing ciliogenesis reverses this process through AKT signaling activation, offering a mechanistic target for managing age-related gum disease and tissue deterioration.
Featured Cover
Spatiotemporal transcriptomic analysis reveals how immune cell populations shift and reorganize within liver tissue during aging, exposing distinct microenvironmental changes that precede functional decline. These findings establish a molecular map of immunological aging in a primary metabolic organ, with implications for understanding how local immune dysregulation contributes to age-related disease susceptibility.