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Mapping the Numbers of Dementia in Brazil: A Delphi Consensus Study

1 month 2 weeks ago
CONCLUSIONS: This Delphi study estimated that dementia already affects roughly 1 in 12 older Brazilians aged 60 and above, with slightly higher prevalence in women and significant geographical variations. These results underscore the urgency for targeted public health strategies in Brazil and offer a framework for similar challenges in other LMICs, especially given that dementia cases are projected to increase by approximately 3.6 times in 4 decades.
Márlon Juliano Romero Aliberti

Aqueous-based recycling of perovskite photovoltaics

1 month 2 weeks ago
Cumulative silicon photovoltaic (PV) waste highlights the importance of considering waste recycling before the commercialization of emerging PV technologies^(1,2). Perovskite PVs are a promising next-generation technology³, in which recycling their end-of-life waste can reduce the toxic waste and retain resources^(4,5). Here we report a low-cost, green-solvent-based holistic recycling strategy to restore all valuable components from perovskite PV waste. We develop an efficient aqueous-based...
Xun Xiao

CASP8 intronic expansion identified by poly-glycine-arginine pathology increases Alzheimer's disease risk

1 month 2 weeks ago
Alzheimer's disease (AD) affects more than 10% of the population ≥65 y of age, but the underlying biological risks of most AD cases are unclear. We show anti-poly-glycine-arginine (a-polyGR) positive aggregates frequently accumulate in sporadic AD autopsy brains (45/80 cases). We hypothesize that these aggregates are caused by one or more polyGR-encoding repeat expansion mutations. We developed a CRISPR/deactivated-Cas9 enrichment strategy to identify candidate GR-encoding repeat expansion...
Lien Nguyen

Listerin promotes alpha-synuclein degradation to alleviate Parkinson's disease through the ESCRT pathway

1 month 2 weeks ago
Parkinson's disease (PD) is a neurodegenerative disorder characterized by the progressive accumulation of abnormal α-synuclein (α-syn) within dopaminergic neurons in the substantia nigra region of the brain. Despite excessive accumulation of α-syn being key to the pathogenesis of PD, the mechanisms governing its clearance remain elusive. In this study, we found that the endosomal sorting complex required for transport (ESCRT) system plays a crucial role in capturing and facilitating the...
Fei Qin

Cellular rejuvenation protects neurons from inflammation-mediated cell death

1 month 2 weeks ago
In multiple sclerosis (MS), inflammation of the central nervous system results in demyelination, neuroaxonal injury, and cell death. However, the molecular signals responsible for injury and cell death in neurons are not fully characterized. Here, we profile the transcriptome of retinal ganglion cells (RGCs) in experimental autoimmune encephalomyelitis (EAE) mice. Pathway analysis identifies a transcriptional signature reminiscent of aged RGCs with some senescent features, with a comparable...
Sienna S Drake

Tumor extracellular vesicle-derived PD-L1 promotes T cell senescence through lipid metabolism reprogramming

1 month 2 weeks ago
The limited success of cancer immunotherapy has posed challenges in treating patients with cancer. However, promising strides could be made with a deeper understanding of the factors that cause T cell dysfunction within the tumor microenvironment and by developing effective strategies to counteract tumor-induced immune suppression. Here, we report that tumor-derived extracellular vesicles (tEVs) can induce senescence and suppression in T cells. Programmed death ligand 1 (PD-L1), a key component...
Feiya Ma

SERBP1 interacts with PARP1 and is present in PARylation-dependent protein complexes regulating splicing, cell division, and ribosome biogenesis

1 month 2 weeks ago
RNA binding proteins (RBPs) containing intrinsically disordered regions (IDRs) are present in diverse molecular complexes where they function as dynamic regulators. Their characteristics promote liquid-liquid phase separation (LLPS) and the formation of membraneless organelles such as stress granules and nucleoli. IDR-RBPs are particularly relevant in the nervous system and their dysfunction is associated with neurodegenerative diseases and brain tumor development. Serpine1 mRNA-binding protein...
Kira Breunig

Astrocytic Hevin/SPARCL-1 Regulates Cognitive Decline in Pathological and Normal Brain Aging

1 month 2 weeks ago
Dementia, characterized by loss of cognitive abilities in the elderly, poses a significant global health challenge. This study explores the role of astrocytes, one of most representative glial cells in the brain, in mitigating cognitive decline. Specifically, we investigated the impact of Hevin (also known as SPARC-like1/SPARCL-1), a secreted glycoprotein, on cognitive decline in both normal and pathological brain aging. By using adeno-associated viruses, we overexpressed Hevin in hippocampal...
Felipe Cabral-Miranda

Reduction of DNA Topoisomerase Top2 Reprograms the Epigenetic Landscape and Extends Health and Life Span Across Species

1 month 2 weeks ago
DNA topoisomerases are essential molecular machines that manage DNA topology in the cell and play important roles in DNA replication and transcription. We found that knocking down the enzyme topoisomerase Top2 or its mammalian homolog TOP2B increases the lifespan of S. cerevisiae, C. elegans, and mice. TOP2B reduction also extends the health span of mice and alleviates the pathologies of aging in multiple tissues. At the cellular/molecular level, TOP2B reduction alleviates the major hallmarks of...
Man Zhu

Astrocytic Hevin/SPARCL-1 Regulates Cognitive Decline in Pathological and Normal Brain Aging

1 month 2 weeks ago
Dementia, characterized by loss of cognitive abilities in the elderly, poses a significant global health challenge. This study explores the role of astrocytes, one of most representative glial cells in the brain, in mitigating cognitive decline. Specifically, we investigated the impact of Hevin (also known as SPARC-like1/SPARCL-1), a secreted glycoprotein, on cognitive decline in both normal and pathological brain aging. By using adeno-associated viruses, we overexpressed Hevin in hippocampal...
Felipe Cabral-Miranda