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Immunosenescence is the process of immune dysfunction and gradual deterioration of the immune system associated with aging, while cellular senescence is the stable cell cycle arrest that can occur in non-immune or immune cells in response to stress or damage. Immunosenescence significantly impacts both the innate and adaptive immune responses and is characterised by physical changes in lymphoid organs, as well as dysfunctions in cellular and molecular mechanisms. Key features of immunosenescence...

Peripheral nerve injuries (PNI) present a significant challenge, particularly in aging populations where Schwann cell dysfunction, reduced c-Jun expression, increased senescence, and impaired myelin clearance hinder regeneration. Targeted therapies aim to restore Schwann cell plasticity and improve nerve repair. These include gene therapy to upregulate c-Jun, senolytic agents to eliminate senescent Schwann cells, pharmacological activation of JNK, ferroptosis inhibition, and stem cell-based...

Spiky projections on plant matter may act like “drain snakes,” helping felines dislodge wads of fur

Finding highlights promise, questions about detectors of AI-generated text

α-Synuclein aggregation is a hallmark of Parkinson's disease and related synucleinopathies. Extracellular α-synuclein fibrils enter naive cells via endocytosis, followed by transit into the cytoplasm to seed endogenous α-synuclein aggregation. Intracellular aggregates sequester numerous proteins, including subunits of the endosomal sorting complexes required for transport (ESCRT)-III system for endolysosome membrane repair, but the toxic effects of these events remain poorly understood. Using...

A multidimensional social exposome (MSE)-the combined lifespan measures of education, food insecurity, financial status, access to healthcare, childhood experiences, and more-may shape dementia risk and brain health over the lifespan, particularly in underserved regions like Latin America. However, the MSE effects on brain health and dementia are unknown. We evaluated 2211 individuals (controls, Alzheimer's disease, and frontotemporal lobar degeneration) from a non-representative sample across...

Stroke prevention is one of the pillars of management in elderly patients with atrial fibrillation (AF), hence effective and safe anticoagulation strategies are needed. While available anticoagulants target coagulation factors involved in thrombus formation, their bleeding complications and limitations in aging populations underscore the necessity for novel agents. Factor XI/XIa (FXI/XIa), which selectively targets the intrinsic coagulation pathway, offers a promising approach by attenuating...

CONCLUSIONS AND IMPLICATIONS: Even among cognitively intact older adults, subtle global cognitive decline predicted higher risk of depressive symptoms, anxiety symptoms, insomnia, falls, and impaired daily functioning. Profiles with orientation deficits were vulnerable to depression, shopping, and banking difficulties, whereas global impairment with preserved orientation was linked to increased anxiety symptoms. Implementing early cognitive screening for cognitively intact older adults and...

A multidimensional social exposome (MSE)-the combined lifespan measures of education, food insecurity, financial status, access to healthcare, childhood experiences, and more-may shape dementia risk and brain health over the lifespan, particularly in underserved regions like Latin America. However, the MSE effects on brain health and dementia are unknown. We evaluated 2211 individuals (controls, Alzheimer's disease, and frontotemporal lobar degeneration) from a non-representative sample across...

Pathogenic missense mutations in the alpha actin isotype 2 (ACTA2) gene cause multisystemic smooth muscle dysfunction syndrome (MSMDS), a genetic vasculopathy that is associated with stroke, aortic dissection and death in childhood. Here we perform mutation-specific protein engineering to develop a bespoke CRISPR-Cas9 enzyme with enhanced on-target activity against the most common MSMDS-causative mutation ACTA2 R179H. To directly correct the R179H mutation, we screened dozens of configurations...

Ageing is characterized by progressive functional decline and increase in disease risk and imposes substantial burdens on human health. Identifying aging biomarkers in primates is crucial for advancing our understanding of human ageing and for informing interventions to mitigate age-related pathologies. However, a comprehensive grasp of these biomarkers is still lacking, hindering the translation of fundamental research into clinical practice. In this Review, we present the current knowledge on...