Skip to main content

Aggregator

What are the Modifiable Risk Factors for Later Life Frailty Development Found Within Midlife Community-Dwelling Adults? A Systematic Review

16 hours 27 minutes ago
ObjectivesThe older population and prevalence of frailty are increasing worldwide. Understanding how midlife exposures influence frailty risk is increasingly important for public health. This review sought to identify modifiable risk factors present in midlife that are associated with the onset of frailty in later life, aiming to inform earlier prevention strategies.MethodsWe conducted a systematic review of studies examining modifiable risk factors in community-dwelling adults aged 39-64 years,...
Sophie Longworth

Endogenous β-hydroxybutyrate and the risk of cognitive decline: a nested case-control study in the UK Biobank cohort

16 hours 27 minutes ago
INTRODUCTION: β-hydroxybutyrate (BHB) has been linked to improved cognitive function via enhanced cerebral metabolism and anti-inflammatory effects. However, evidence on the relationship between endogenous plasma BHB levels and cognitive decline remains limited. This study investigated whether higher plasma BHB levels are associated with reduced cognitive decline in middle-aged and older adults.
Youngmi Eun

Modifying Role of Sustainable Diets on the Association Between Particulate Matter and Biological Aging: The Guangzhou Biobank Cohort Study

16 hours 27 minutes ago
Air pollution accelerates biological aging via oxidative stress and inflammation, a process potentially mitigated by plant-based diets. However, the role of dietary or genetic modulators in this relationship remains understudied. Our study aimed to examine whether adherence to Sustainable Diets modifies the associations of PM(2.5) and PM(10) exposure with biological aging, and to assess potential effect modification by genetic susceptibility to longevity. Data from 9527 participants in the...
Rui Qiang Li

Adipocytes as core drivers of skin aging and novel targets for regeneration

16 hours 27 minutes ago
Skin aging has traditionally been attributed to alterations in the epidermis and dermis, including keratinocyte senescence, extracellular matrix (ECM) degradation, and fibroblast dysfunction. In contrast, the role of skin-associated adipose tissue (SAAT), particularly dermal white adipose tissue (dWAT), has been largely overlooked and considered a passive structural filler. Emerging evidence indicates that adipocyte aging is not merely a consequence of skin aging but may serve as a critical...
Enhui Wang

Magnetic resonance microscopy maps widespread effects of Alzheimer's disease on brain structures and behavior in mice

1 day 16 hours ago
Alzheimer's disease has widespread effects on brain structure, function and behavior, but we lack a systematic dissection of its impact across hundreds of forebrain and brainstem regions. Here, using diffusion tensor MRI at 25 µm, we mapped the global consequences of mutations in APP and PSEN1 across 231 regions of interest (ROIs) in male and female 5×FAD BXD hybrid mice at 14 months. Over half of the ROIs change in volume along rostrocaudal and mediolateral axes of the CNS, with unexpected...
Yuqi Tian

Subtyping Alzheimer's disease and Parkinson's disease using longitudinal electronic health records

1 day 16 hours ago
Neurodegenerative diseases such as Alzheimer's disease (AD) and Parkinson's disease (PD) are clinically heterogeneous, hampering the success of nonselective treatment strategies. Here we apply a transformer-based unsupervised clustering framework to longitudinal electronic health record data from over 100,000 patients across two UK cohorts, Clinical Practice Research Datalink Aurum and UK Biobank, to identify, validate and characterize subtypes of AD and PD. We uncover five reproducible subtypes...
Jie Lian

Ribonuclease kappa promotes longevity by preventing age-associated accumulation of circular RNA in stress granules

1 day 16 hours ago
Circular RNAs (circRNAs) accumulate with age, but their functional impact on aging remains elusive. In this study, we reveal a mechanism by which ribonuclease κ (RNASEK) prevents age-dependent circRNA accumulation by promoting its degradation. Through a genetic screen targeting ribonucleases, we identified RNASEK as a specific circRNA-cleaving ribonuclease. RNASEK is downregulated during aging, causing the age-dependent increase in circRNA levels. RNASEK is necessary and sufficient for lifespan...
Sieun S Kim

Astaxanthin as a neuroprotective modulator of synaptic plasticity, learning, and memory: mechanistic insights and therapeutic perspectives in neurodegenerative aging

1 day 16 hours ago
Astaxanthin (AST), a xanthophyll carotenoid derived from microalgae and marine organisms, has emerged as a potent neuroprotective compound with remarkable antioxidant and anti-inflammatory properties. Growing evidence indicates that AST can modulate multiple molecular and cellular pathways involved in neuronal survival, synaptic plasticity, learning, and memory, particularly in the context of neurodegenerative aging. This review provides an up-to-date and integrative overview of current evidence...
Fan Guo

Oxytocin restores cognitive function and attenuates neuroinflammation in chronic sleep-deprived aged rats

1 day 16 hours ago
CONCLUSION: The results suggest that oxytocin modulates stress responses, oxidative balance, and inflammatory pathways in aged rats subjected to chronic sleep deprivation. Although the precise central mechanisms remain unresolved, these findings support a potential role for oxytocin in mitigating SD-associated pathophysiological changes in aging and warrant further mechanistic studies to clarify its neuroprotective potential.
Hany A Elkattawy

Lactose-Derived Carbohydrates Induce Sexually Dimorphic Nutritional Programming Effects on Lifespan in Drosophila melanogaster

1 day 16 hours ago
Early-life nutrition can exert long-lasting effects on later-life health. Given that lactose is extensively consumed during early mammalian development, this raises the intriguing possibility that lactose or its constituent galactose may exert beneficial nutritional programming effects. We tested here whether early-life (larval period) co-consumption of galactose and glucose (GALGLU; as in hydrolysed lactose) shapes later-life (adult) lifespan in Drosophila melanogaster. Larval GALGLU versus...
Peixin Sun

DNA Methylation Signatures of Cellular Senescence Are Not Reversed by Senolytic Treatment

1 day 16 hours ago
Epigenetic clocks are commonly used aging biomarkers based on DNA methylation that predict long-term morbidity and mortality risk. Increased cellular senescence with age is also posited to contribute to age-related disease and mortality. However, prior studies have found that existing epigenetic clocks show inconsistent associations with cellular senescence and no reductions after senolytic treatment. We hypothesize this reflects that senescence-related CpGs are a small proportion of age-related...
Jessica Kasamoto

Neuroendocrine-associated epigenetic factors in cellular senescence: mechanisms and therapeutic implications

1 day 16 hours ago
Ageing is a progressive biological process causing a reduction in tissue and cellular function due to accumulated molecular damage over time. Cellular senescence is a stable cellular state characterized by irreversible cell-cycle arrest accompanied by distinct molecular, epigenetic, and secretory alterations. Moreover, neuroendocrine signalling and epigenetic regulation have had a great impact on controlling ageing and senescence. As a part of the neuroendocrine system, the...
Selvaraj Jayaraman