Aggregator

Recently discovered genetic variants seem to protect against Alzheimer's disease, suggesting a path toward a cure. But are their powers believable?

Study of mitochondria suggests new treatment strategy for Alzheimer's and other diseases.

CONCLUSIONS: Socioeconomic inequalities in functional ageing are apparent in England and Canada, are larger in England than in Canada, and are not fully explained by common risk factors. These findings suggest that multilevel approaches, combining individual-level interventions with structural measures, are required to address socioeconomic inequalities and cross-country differences in functional ageing. Variation in wealth associations by sex suggests that approaches to reducing socioeconomic...

Parkinson's disease (PD) is commonly associated with the loss of dopaminergic neurons in the substantia nigra, but many other cell types are affected even before neuron loss occurs. Recent studies have linked oligodendrocytes to early stages of PD, though their precise role is still unclear. PINK1 is mutated in familial PD, and through unbiased single-cell sequencing of the entire brain of Drosophila Pink1 models, we observed significant gene deregulation in ensheathing glia (EG), cells that...

CONCLUSION: Age and VF are nonlinearly associated across adulthood, with educational attainment being a major determinant. Higher central adiposity is associated with lower VF and moderates the associated with age. Lower-limb functional performance was independently associated with VF, potentially reflecting a functional pathway linking adiposity, mobility, and cognitive aging.

Female reproductive aging is associated with ovarian functional decline, leading to infertility. During aging, biochemical and biophysical changes in the ovarian extracellular matrix (ECM) occur, yet how these properties affect follicle growth and oocyte quality remains poorly understood. Here we describe spatiotemporal changes in the ovarian ECM with age using mass spectrometry, immunohistochemistry, and nanoindentation. While follicle stiffness remains unchanged, stromal matrix remodeling is...

As global population aging accelerates, maintaining locomotor function in later life has become a critical biomedical challenge. This study investigates the effects of three bioactive compounds-Luteolin (Lut), Glycitein (Gly), and α-Spinasterol (α-Spin)-isolated from the traditional Chinese medicinal herb Codonopsis pilosula (Dangshen), on age-related locomotor decline using the Caenorhabditis elegans (C.elegans) model. We demonstrate that Lut and Gly significantly ameliorate the deterioration...

Microglia, the brain's resident immune cells, are transcriptionally diverse and highly dynamic, but during aging and disease they lose their transcriptomic flexibility and adopt a chronically activated state that is associated with neuroinflammation and pathology. An emerging transcriptomic process that is also increasingly implicated in brain aging, neuroinflammation, and disease is the dysregulation of transposable elements (TEs), repetitive genomic sequences with the potential to cause...

Age-related cognitive decline is a major social and medical challenge, but its mechanisms remain poorly understood; prevention and therapy are unsatisfactory. The tachykinin hemokinin-1 (HK-1), encoded by the Tac4 gene, is expressed in brain regions involved in learning and memory and has been implicated in neuroimmune regulation, but its contribution to age-dependent cognitive impairment remains unclear. Here, we investigated whether endogenous HK-1 modulates cognitive performance during aging....

Growth hormone (GH) exerts complex effects on metabolism, cognition, and overall physiological well-being, and its secretion is highly regulated by the circadian clock. The Growth Hormone Receptor Knockout (GHR-KO) mouse, a model of GH insensitivity, characterized by chronically elevated circulating GH, provides a unique opportunity to examine the consequences of disrupted GH signaling during aging. Given the close relationship between circadian rhythmicity and GH secretion, we investigated sex-...

CONCLUSIONS: Research investigators, staff, Veterans, and caregivers identified several cross-cutting challenges that are important in the recruitment and retention of older rural Veterans in research. The adaptations proposed here demonstrate that the 5Ts Framework can extend to intersectional aging populations, providing a model for broader representation in research.

Microglia, the brain's resident immune cells, are transcriptionally diverse and highly dynamic, but during aging and disease they lose their transcriptomic flexibility and adopt a chronically activated state that is associated with neuroinflammation and pathology. An emerging transcriptomic process that is also increasingly implicated in brain aging, neuroinflammation, and disease is the dysregulation of transposable elements (TEs), repetitive genomic sequences with the potential to cause...