Aggregator
Defend scientific integrity and academic freedom
Top of the crops: rice scientists seek to meet global food demands
Europe must become a research epicentre as US system gets undermined
‘Dark matter’, 'Big Bang' and ‘spin’: how physics terms can confuse researchers
Author Correction: Structure of the human dopamine transporter in complex with cocaine
In killing grants, NSF appears to follow Ted Cruz’s blueprint
Senator’s report targeted up to $2 billion for diversity, climate change, and misinformation research
Association between social networking and dementia: A systematic review of observational studies
Poor social networking (SN) is associated with the development of cognitive impairment and dementia. Our objective was to perform a systematic review of the evidence on the associations between SN and the incidence of dementia, disease pathology, level of cognition, and brain structure. Bibliographic databases (PubMed, Embase, Cochrane Library, CINAHL) and additional sources (Open Gray, Google Scholar, manual searches) were screened through November 30, 2024. Observational studies assessing the...
Sexuality and quality of life in later life: overcoming old narratives, addressing new challenges
Sexuality in later life has been traditionally defined through a narrative of decline, assuming that older adults have less sexual capacities and interests. However, such a view has been challenged by a new, more optimistic and inclusive paradigm of aging which recognizes the sexual needs and rights of older adults.
Longevity mechanisms in cardiac aging: exploring calcium dysregulation and senescence
Cardiac aging is a multistep process that results in a loss of various structural and functional heart abilities, increasing the risk of heart disease. Since its remarkable discovery in the early 1800s, when limestone is heated, calcium's importance has been defined in numerous ways. It can help stiffen shells and bones, function as a reducing agent in chemical reactions, and play a central role in cellular signalling. The movement of calcium ions in and out of cells and between those is...
Dietary inflammatory index (DII) and telomere length: a systematic review
Dietary intake influences inflammation and may impact telomere length (TL), a biomarker of biological aging. However, the relationship between the inflammatory potential of the diet and TL remains unclear. This review systematically assessed whether higher Dietary Inflammatory Index (DII) scores, indicative of pro-inflammatory diets, are associated with shorter TL. Searches in PubMed, Embase, Scopus, Web of Science, and Cochrane up to October 2024 identified nine eligible studies, involving...
Multi-omic and spatial analysis of mouse kidneys highlights sex-specific differences in gene regulation across the lifespan
There is a sex bias in the incidence and progression of many kidney diseases. To better understand such sexual dimorphism, we integrated data from six platforms, characterizing 76 kidney samples from 68 mice at six developmental and adult time points, creating a molecular atlas of the mouse kidney across the lifespan for both sexes. We show that proximal tubules have the most sex-biased differentially expressed genes emerging after 3 weeks of age and are associated with hormonal regulations. We...
Mesenchymal stem cells and their derivatives as potential longevity-promoting tools
Mesenchymal stem cells (MSCs) and blood plasma/MSC-derived extracellular vesicles (EVs) offer promising tools to promote longevity and treat age-related diseases. MSCs have low immunogenicity and tumorigenicity, and their efficacy is relatively independent of the donor age in humans (but not in rodents). Systemic administration of MSCs and stem cell/blood-derived EVs modified the omic profiles of various organs of aged rodents towards the young ones. The application of EVs appears to be even...
Effects of aerobic exercise of different intensities on the social, emotional, and financial functioning of healthy older adults: results from a 16-week exercise randomized control trial
Better social, emotional, and financial functioning are associated with improved health outcomes in older adults. While the literature supports a positive relationship between physical activity and increased functional ability in older adulthood, the intensity of physical activity necessary to achieve these gains remains uncertain. To address this gap, the current analysis uses data collected as part of a larger randomized controlled trial to examine the effects of a supervised exercise...
Sirt2 deficiency aggravates intramuscular adipose tissue infiltration and impairs myogenesis with aging in male mice
Sarcopenia, closely associated with other diseases such as diabetes, metabolic syndrome, and osteoporosis, significantly impacts aging populations. It is characterized by muscle atrophy, increased intramuscular adipose tissue, impaired myogenesis, chronic low-grade inflammation, and reduced muscle function. The mechanisms behind aging muscle remain incompletely understood. This study aims to elucidate the role of Sirt2 in the aging process of skeletal muscles and enhance our understanding of the...
The association between dietary quality and biological aging: two-mediation analysis
CONCLUSION: Dietary quality is closely associated with biological aging, with anti-aging proteins and oxidative stress potentially serving as underlying mediation mechanisms.
New NIH director defends grant cuts as part of shift to support MAHA vision
In his first public remarks, Bhattacharya emphasizes his overall support for agency
How India rewrote the rules of space travel when it launched its first satellite
Ultracool microscopy yields a sharper look at proteins
After years of frustration, researchers learn how to sharpen molecular images with liquid helium
EPA orders staff to begin canceling research grants
Agency targets programs that award up to $40 million annually
Perineuronal nets: Role in normal brain physiology and aging, and pathology of various diseases
Perineuronal nets (PNNs) are a specialized extracellular matrix in the central nervous system. They are widely distributed in the brain, with distribution patterns varying by brain region. Their unique structure and composition allow them to play an important role in a range of physiological and pathological activities. In this article, we review the composition and structure of PNNs across different life stages, and provide a detailed analysis and comparison of the region-specific distribution...