Aging & Longevity

Collagen loss is one of the major contributor to signs of skin aging such as dryness, roughness, and wrinkle formation, which is closely linked to a decline in the amount of proline produced in mitochondria. Melatonin has been shown to improve several clinical signs of skin aging, while the mechanism is unclear. In our study, we found that mitophagy, proline synthesis key enzyme NADK2 and proline and collagen levels were significantly reduced, while oxidative stress levels increased in aging...

Ames dwarf mice (df/df) live 50% longer than normal littermates due to a genetic defect in growth hormone (GH) signaling. The enhanced longevity of Ames dwarfs has been studied extensively in an endocrinological context of cellular metabolism and increased resistance to oxidative stress (Bartke. World J Mens Health 37(1):19, 8; Bartke 2; BartkeJ Am Aging Assoc 23(4):219, 10; Bartke. World J Mens Health 39(3):454-465, 11; Brown-Borg et al. Nature 384(6604):33-33, 1; Masternak et al. 2018)....

The human Fallopian tube (FT) is an important organ in the female reproductive system and has been implicated as a site of origin for pelvic serous cancers, including high-grade serous tubo-ovarian carcinoma (HGSC). We have generated comprehensive whole-genome bisulfite sequencing, RNA-seq, and proteomic data of over 100 human FTs, with detailed clinical covariate annotations. Our results challenge existing paradigms that extensive epigenetic, transcriptomic and proteomic alterations exist in...

Samul-tang (SM) is a traditional prescription widely used in clinical practice for the management of gynecological diseases, especially for menstrual regulation and infertility treatment. We previously reported its efficacy in increasing mature oocyte production and improving ovarian reserves, potentially regulated by rat sarcoma virus (Ras) signaling in the ovaries of aged mice. Although the main ingredients of SM are known, the bioactive compounds responsible for protecting ovarian function...

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Ageing is the most prominent risk factor for Alzheimer's disease (AD). However, the cellular mechanisms linking neuronal proteostasis decline to the characteristic aberrant protein deposits in the brains of patients with AD remain elusive. Here we develop transdifferentiated neurons (tNeurons) from human dermal fibroblasts as a neuronal model that retains ageing hallmarks and exhibits AD-linked vulnerabilities. Remarkably, AD tNeurons accumulate proteotoxic deposits, including phospho-tau and...

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Adeno-associated viral (AAV) vectors are an ideal platform for gene therapy due to their ability to deliver therapeutic cargos safely and effectively across various target organs. Their low immunogenicity contributes to long-lasting therapeutic effects. However, recent insights highlight the significance of CpG content within AAV vectors, where unmethylated CpG dinucleotides can trigger a TLR9-mediated immune response, leading to the rapid elimination of transduced cells. Clinical evidence...

CONCLUSIONS: The risk of osteoporosis is independently associated with the prediction of mortality. The OSTA may serve as a suitable predictor for mortality related to osteoporosis among the Asian population.

CONCLUSION: Moderate and light physical activity in older adults alleviates depression and improves instrumental activities of daily living (IADLs), and light physical activity improves the level of activities of daily living (ADLs).

CONCLUSION: The prevalence of VI is high older (> 55 years) adults in Cameroon, with clear differences between men and women. The oldest individuals, and women appear to be most vulnerable. The identification of at-risk groups/persons through this cross-sectional study should make it possible to adapt public health strategies to contribute to the WHO objective of healthy ageing.

Ankle proprioception and attentional resources are crucial for maintaining balance and safely driving. However, research exploring the age-related integrity of ankle proprioception has yielded conflicting results, while the attentional demand of proprioceptive processing in seniors remains underexplored. We investigated how aging affects the interaction between proprioception and attention in healthy sedentary adults using a novel dual-task paradigm. Sedentary old and young adults performed an...

N⁴-acetylcytidine (ac⁴C) is deposited on diverse RNAs by N-acetyltransferase 10 (NAT10), a protein with high biological relevance for aging and cancer. We performed a comprehensive survey of ac⁴C using metabolic labeling, sodium cyanoborohydride chemical treatment coupled to next-generation sequencing (NGS), and ac⁴C antibody-based cell and molecular biology techniques. Our analysis shows that NAT10-dependent ac⁴C-acetylation is robust in rRNA and specific tRNAs but low/spurious in mRNA. It also...

Osteoarthritis (OA) is a prevalent joint disease characterized by pain, disability, and loss of physical function, posing a challenge to public health. However, molecular mechanisms of OA pathogenesis have not been fully described. We report that tripartite motif containing 15 (TRIM15) is a regulator in chondrocyte senescence and OA. Our study revealed heightened expression of TRIM15 in chondrocytes of senescent cartilage from patients with OA and in aged wild-type mice. Using gain- and...

Senescence is a non-proliferative cellular state derived from aging or in response to exogenous insults, such as those that cause DNA damage. As a result of cancer treatments like cisplatin, certain tumor cells may undergo senescence. However, rather than being beneficial for patients, this is detrimental because these cells might proliferate again under specific conditions and, more importantly, because they synthesize and secrete molecules that promote the proliferation of nearby cells....

Aging is characterized by changes in gene expression, some of which can drive deleterious cellular phenotypes and senescence. The transcriptional activation of senescence genes has been mainly attributed to epigenetic shifts, but the changes in chromatin accessibility and its underlying mechanisms remain largely elusive in natural aging. Here, we profiled chromatin accessibility in human dermal fibroblasts (HDFs) from individuals with ages ranging from neonatal to octogenarian. We found that...

Maximizing metal-substrate interactions by self-reconstruction of coadjutant metastable phases can be a delicate strategy to obtain robust and efficient high-density single-atom catalysts. Here, we prepare high-density iridium atoms embedded ultrathin CoCeOOH nanosheets (CoCe-O-Ir(SA)) by the electrochemistry-initiated synchronous evolution between metastable iridium intermediates and symmetry-breaking CoCe(OH)(2) substrates. The CoCe-O-Ir(SA) delivers an overpotential of 187 mV at 100 mA...

Cycling positive electrode materials with high voltages and long lifetimes remains a challenge. On the one hand, operating electrodes at high voltages is usually accompanied by severe structural distortions and irreversible reactions. On the other hand, the significant volume variation upon Na^(+) insertion/extraction limits the long cycling life. Here, we report a defective positive electrode material with a chemical formula of Na(3.2)□(0.8)Co(0.5)Fe(0.5)V(PO(3.9)F(0.1))(3) (□ represents Na...

CONCLUSIONS: Sarcopenia and depressive symptomatology are highly co-occurring in geriatric patients, and this association may be independent of frailty and comordibity burden.

Multiple myeloma (MM), an incurable malignancy of plasma cells, is predominantly an age-related disease, with the majority of cases occurring in patients over the age of 60. Cellular senescence, a fundamental biological process underlying aging, has been increasingly recognized for its critical role in developing age-related malignancies. In this study, we aimed to investigate the prognostic significance of genes implicated in the molecular mechanisms of senescence within a large cohort of MM...