Hallmarks of Aging Library
Every article, presentation, spotlight, and news item we've tagged to Hallmarks of Aging.
Showing 1–24 of 401
How Inflammaging Is Linked to Epigenetic Aging
A Cell Genomics study demonstrates that age-related systemic inflammation (inflammaging) correlates with epigenetic aging as measured by established epigenetic clocks. This connection bridges two major aging hallmarks and suggests chronic low-grade immune activation reflects measurable changes in gene expression patterns independent of overt disease.
Senescent cells drive aging inflammation
Cellular senescence—the accumulation of non-dividing cells that secrete inflammatory factors—drives age-related decline in multiple organ systems. Understanding how senescent cells compromise tissue function and identifying interventions that clear or manage their activity offers a direct path to extending both healthspan and lifespan.
Mitochondrial Dysfunction Drives Stem Cell Aging
Mitochondrial dysfunction accelerates stem cell aging and triggers systemic inflammation, establishing a mechanistic link between cellular energy production and age-related tissue deterioration. This pathway represents a critical intervention point for extending healthspan through targeted mitochondrial support.
Inflammatory Fidelity: Restoring Aging's Lost Immune Balance
Dr. José Pedro Castro's research centers on inflammatory fidelity—the maintenance of balanced inflammatory homeostasis that deteriorates with age. His systems-based approach reveals inflammation as both essential to healthy function and a key driver of aging pathology, positioning targeted inflammatory regulation as a therapeutic frontier for healthspan extension.
How Intestinal Aging Encourages Harmful Bacteria
Intestinal aging creates a self-reinforcing cycle where the gut barrier weakens, immune function declines, and harmful bacteria replace beneficial species. This shift compromises the production of short-chain fatty acids and other metabolites that support immune regulation, accelerating mucosal dysfunction and systemic inflammation with advancing age.
Why aging feels harder after 40
Circulating stem cell count declines sharply after age 30, reducing tissue repair capacity and resilience. This decline correlates with recovery time, injury healing, and disease risk—making stem cell abundance a measurable predictor of healthspan independent of conventional longevity markers.
Senotype classification reframes cellular aging as adaptive or pathological
Senescent cells—those that have stopped dividing—exhibit distinct molecular profiles and functional outcomes depending on their origin and microenvironment. This classification framework clarifies why some senescent states support tissue repair while others drive chronic inflammation and age-related disease, fundamentally shifting how we interpret cellular aging.
Aged Gut Microbiota Induces Mucosal Transcriptional Dysregulation, Impairing Immune Surveillance
Aging disrupts intestinal mucosal immunity through a cascade of changes: epithelial barrier weakening, shifts toward pro-inflammatory gut bacteria, dysregulation of immune surveillance cells, and impaired pathogen recognition. This multi-system breakdown creates a mechanistic link between microbial composition and immune dysfunction that directly drives infection susceptibility in older adults.
Maladaptive Inflammatory Signaling in Old Mice Impairs Colonic Regeneration by Promoting a Sustained Fetal‐Like Epithelial State
Aging impairs colonic regeneration through a maladaptive immune response characterized by excessive interferon-gamma production that triggers apoptosis in epithelial cells already primed in a fetal-like regenerative state. This dysregulation of immune-epithelial communication represents a critical mechanism by which aging compromises tissue repair capacity and increases vulnerability to infectious challenge.
Hematopoietic stem cell aging drives systemic inflammation
Hematopoietic stem cells undergo functional changes with age that increase their capacity to generate inflammatory immune responses. This correction addresses methodology in research linking stem cell aging to systemic inflammation, a central mechanism in age-related disease development.
Kinase Dysfunction Breaks Cellular Communication Networks During Aging
Metabolic kinases—AMPK, mTOR, AKT, PDK, and PERK—coordinate communication between mitochondria, the endoplasmic reticulum, lysosomes, peroxisomes, and the Golgi apparatus. Dysregulation of these kinases during aging impairs this inter-organelle coordination, driving mitochondrial dysfunction, oxidative stress, and metabolic decline that underlie age-related disease.
Glycative Stress Disrupts the Mitochondrial‐Lysosome Axis and Promotes Geroconversion in Aging Cardiomyocytes
Advanced glycation end products accumulate in cardiac mitochondria with age, impairing lysosomal function and mitochondrial quality control. This impaired clearance mechanism drives cellular senescence and represents a mechanistic link between cardiac aging and heart failure development.
Senescent Cells Block Cellular Cleanup in Aging
Cellular senescence and autophagy dysfunction accumulate with age, driving multiple organ system decline. Understanding how senescent cells disrupt normal repair mechanisms reveals intervention points for extending healthspan independent of chronological age.
Stem cell immune memory triggers inflammaging via SIRT3 loss
Aging hematopoietic stem cells develop a maladaptive form of innate immune memory that perpetuates chronic inflammation and accelerates physiological decline. The decline of SIRT3, a mitochondrial regulator, removes a critical inhibitor of this inflammatory cascade, establishing a mechanistic link between mitochondrial dysfunction and age-related immune dysregulation.
Targeting protein misfolding in neurodegeneration
Protein misfolding drives over 100 diseases and accelerates aging-related decline. Origami Therapeutics is developing targeted protein degraders and conformation correctors that address root cause mechanisms rather than symptoms, with initial focus on neurodegenerative diseases including Huntington's, Alzheimer's, and Parkinson's.
New findings link autophagy failure to early Alzheimer’s pathology
Impaired neuronal autophagy precedes amyloid-beta and tau pathology in Alzheimer's disease, suggesting that restoring cellular clearance mechanisms may address disease onset at a mechanistic level upstream of classical biomarkers. This positions autophagy dysfunction as a tractable target for intervention before irreversible neurodegeneration.
Urbanization, environment, and inflammaging: insights from sub-Saharan Africa
Urban environments in sub-Saharan Africa show accelerated inflammaging—chronic, low-grade systemic inflammation associated with aging—driven by environmental stressors including air pollution, pathogenic load, and dietary shifts. This research identifies modifiable environmental and lifestyle factors that influence the rate of immunological aging independent of chronological age.
Global Conference to Tackle Longevity Clinical Translation
The NUS Academy for Healthy Longevity is hosting a Geromedicine Conference in February 2026 to advance the clinical translation of geroscience research into practical interventions. The event will focus on implementing evidence-based strategies including targeted molecules, bioactive compounds, and repurposed pharmaceuticals within personalized care frameworks.
Stalled RNA-DNA Complexes Trigger Inflammatory Aging
Senescent cells accumulate aberrant RNA-DNA complexes (R-loops) in their cytoplasm that persist due to transcriptional dysregulation, triggering the secretion of pro-inflammatory factors that drive systemic inflammation. This mechanism identifies a specific molecular pathway linking cellular senescence to age-related inflammatory disease.
Physics-based aging models shift geroscience from observation to prediction
Gero has secured $17 million in new funding to develop physics-based mathematical models of aging that move beyond observation toward prediction. The company's framework treats aging as a process governed by quantifiable physical laws rather than an accumulation of isolated cellular damage, positioning the field to transition from descriptive geroscience to predictive intervention.
Immune Surveillance Controls Microbiome Balance in Aging
The immune system actively regulates microbial composition by suppressing proliferation of dominant species rather than eliminating pathogens, maintaining ecosystem balance throughout life. Age-related weakening of this surveillance mechanism drives dysbiosis and contributes to age-associated disease and lifespan reduction.
Diminished and Altered Cellular Senescence Response in Delayed Wound Healing of Aging
Wound healing in young skin relies on a coordinated senescence response in fibroblasts that produces tissue-remodeling proteins and supports closure. In aged individuals, this response is both diminished and functionally altered toward inflammation, directly impairing repair capacity and contributing to delayed healing.
Single‐Cell Profiling Reveals Distinct Immune Communication Networks in Centenarians and Elderly Controls
Single-cell immune profiling distinguishes centenarians from age-matched controls through divergent intercellular communication patterns: healthy aging shows reinforced regulatory signaling supporting cytotoxicity and immune surveillance, while standard aging exhibits self-amplifying senescence signals linked to immune exhaustion. This immune remodeling signature may explain exceptional longevity phenotypes.
Senescent Cell Diversity Defines Fibrotic vs Inflammatory Aging
Senescent cells—those that have stopped dividing—adopt distinct molecular profiles depending on how they became senescent. Primary senescence (triggered by direct DNA damage) activates fibrosis and tissue-remodeling programs, while secondary senescence (induced by signals from other senescent cells) drives inflammatory pathways. Both share conserved stress-response mechanisms, revealing that senescence heterogeneity fundamentally shapes how these cells contribute to aging.