Scientists successfully generate tetraploid iPS cells through cell fusion, which replicate the natural chromosome doubling process in mature cardiomyocytes. This breakthrough enables the development of a technology to enhance cardiac function, offering new therapeutic strategies for diseases such as heart failure.
Researchers demonstrate prion-like transmission of tau in mice, replicating disease-specific pathologies. The study shows that tau filaments from Alzheimer's and corticobasal degeneration patients induce endogenous tau pathologies with identical structures, confirming the prion-like transmission of tau.
Researchers identified a molecular mechanism that helps initiate autophagic membranes around damaged mitochondria. RAB1 proteins act as links between OPTN and ATG9A vesicles, enabling the initial formation of autophagic membranes during mitophagy. This mechanism is crucial for the early stages of autophagy initiation.
Researchers developed a non-invasive spinal stimulation system that bypasses the lesion site and strengthens preserved spinal circuits. This approach enables paraplegic patients to regain bilateral stepping control and improve step length and cadence.
A study characterizes the ubiquitination of Nrf1, a transcription factor, triggered by deglycosylating enzymes, leading to its inactivation and preventing it from functioning properly. This process is associated with proteasome dysfunction and age-related neurodegenerative diseases.
Prolonged endosomal defects lead to cell death, but the effects on cellular signaling were poorly understood. Endosomal stress caused by USP8 depletion induces immune responses and activates NF-kB- and Nrf2-mediated gene expression.
A longitudinal study found that worsening depressive symptoms among adolescents are associated with decreased help-seeking intentions. The study's findings suggest creating a supportive environment is crucial to encourage adolescents to disclose their psychological distress.
This study demonstrates the potential of cell therapy using genome-edited iPS cells secreting therapeutic molecules, such as mNAGA, to supply GLA activity in vivo. Transplantation of these cells improved GLA activity in the liver, but not in other organs, and future enhancements are possible through genome editing.
Researchers discovered a novel function of Claspin in the nutrition-induced signaling pathway, essential for activation of PI3K-PDK1-mTOR pathway and cell survival. This finding provides new targets for therapeutic interventions of metabolic disorders such as obesity, diabetes, and cancers.
Recent studies have found improved efficacy against SARS-CoV-2 infection with the third dose of the vaccine, leading to a reduction in hospitalization. Booster vaccinations also resulted in further increases in antibody responses, demonstrating strong and persistent immunity.
A new mouse model of RP58/ZBTB18 haploinsufficiency shows impaired motor learning, working memory, and cognitive flexibility. The study suggests that excitatory synaptic defects underlie intellectual disability caused by RP58/ZBTB18 haploinsufficiency.
Researchers developed a gene therapy tool that protects retinal ganglion cells and promotes optic nerve regeneration in glaucoma models. The treatment, AAV-F-iTrkB, is effective in both high- and normal-intraocular-pressure models, showing promise for treating axonal damage and neurodegenerative diseases.
Research reveals abnormal fatty acid metabolism underlying sleep disorders, including narcolepsy type 1. CPT1 activity identified as potential biomarker for screening certain sleep disorders.
A birth cohort study found that muscular strength is associated with higher risk of psychotic symptoms, which may be mediated by advanced glycation end products (AGEs) in adolescence. Low muscular strength was linked to higher levels of pentosidine, a representative AGE, and increased thought problems as a psychotic symptom indicator.
Researchers have identified a novel drug candidate, lonafarnib, that improves neuronal morphological defects, abnormal function, and memory impairments in a mouse model of tuberous sclerosis complex. The study suggests that reducing the levels of active Rheb is crucial for normalizing memory in TSC mice.
Phosphorylated α-synuclein first appears at synapses near the site of inoculation, then spreads to axons and forms aggregates in neuronal cell bodies. This process begins in the synaptic region and may provide insight into prion-like propagation.
A genetic study identified an AKR1A1 variant associated with schizophrenia that leads to exon skipping and loss of enzymatic activity. The c.753G>A and c.264delC variants were found in patients with schizophrenia, suggesting a potential molecular mechanism behind GlucA accumulation.
A study published in Science Advances found that high-sucrose diets contribute to brain angiopathy with impaired glucose uptake, leading to psychosis-related higher brain dysfunctions in mice. The researchers created a novel mouse model exhibiting mental disorder-like symptoms after excessive sugar intake at puberty.
Researchers found that pyruvate supplementation prevents rapid cell death of peripheral sensory neurons and Schwann cells under high-glucose conditions. Exogenous pyruvate may play a key role in maintaining glycolysis-TCA cycle flux by suppressing PARP activity, thereby supporting cellular viability and energy production.
Researchers have developed a novel mouse model that accurately replicates the pathological propagation of tau protein isoforms in Alzheimer's disease, corticobasal degeneration, and Pick's disease. The model shows endogenous expression of both 3R and 4R tau, which accumulates in brain regions characteristic of each disease.
A new study reveals that high levels of polyunsaturated fatty acids in liver cells are associated with resistance to hepatitis C virus infection. Lipid peroxidation occurs on PUFA-enriched membranes where viral replication machinery is anchored, ultimately shutting off its ability to replicate the viral genome.
The study elucidates the mechanism by which CXCL14 binds to CpG DNA and enhances innate immune responses. A complex formation between CpG DNA and CXCL14 is necessary for internalization of CpG DNA, and multiple amino acids stabilize binding.
A recent study found that mTORC1 enhances neuronal network activity in TSC neurons by increasing Ca2+ influx via L-type Ca2+ channels. This increase promotes axonal extensions and triggers sustained activation of CREB, a transcription factor important for synaptic plasticity.
A study of 277 drug-naive adolescents found a link between fingertip advanced glycation end products and the trajectory of psychotic symptoms. Baseline levels of these compounds predicted the risk of persistent psychotic symptoms, suggesting their involvement in the pathophysiology of early psychosis.
A study found that plasma pentosidine levels, a marker of advanced glycation end products, were significantly associated with impaired processing speed in schizophrenia patients. The results suggest that reducing AGEs may contribute to improving cognitive function and promoting recovery in patients with schizophrenia.
The study reveals that FBS2 protein is responsible for the lethality in NGLY1-knockout mice, causing cell growth suppression and accumulation of ubiquitinated glycoproteins. The absence of NGLY1 leads to proteasome inhibition, resulting in cell death.
Research found that mice with impaired methylglyoxal detoxification systems exhibited schizophrenia-like behavioral abnormalities, including social interaction and cognitive memory impairments. Low levels of vitamin B6 were also observed in mice and patients with schizophrenia.
Researchers found significant correlations between brain capillary curvature and neurite thickness radius in schizophrenia patients, but not between capillary diameter and neurite thickness. The study suggests neurovascular abnormalities contribute to schizophrenia.
A study found that Vitamin B6 deficiency is associated with social deficits, cognitive impairment, and hyperactivated noradrenergic systems in mice. Supplementing the brain with Vitamin B6 improved these abnormalities, suggesting a potential therapeutic strategy for schizophrenia patients with Vitamin B6 deficiency.
The study evaluates the validity of diagnostic criteria for anti-NMDA receptor encephalitis in children, revealing age-dependent symptom patterns. The sensitivity and specificity of the criteria were found to be high, with notable differences in presentation between pediatric and adult patients.
Researchers discovered human BCAS3 and C16orf70 as novel autophagic proteins, which accumulate around damaged mitochondria after mitophagy induction. The BCAS3-C16orf70 complex is required for autophagosome formation site recruitment, indicating accessory functions in autophagy machinery.
Researchers found that neuron structures differ between brain areas and individuals, with variations in shape and curvature affecting cognitive functions. The study used nanotomography to analyze brain tissue samples from 34 schizophrenia and 4 control cases.
A 60-year-old cohort study found that prioritizing interests and curiosity during adolescence enhances wellbeing in later life. The research, conducted over 60 years, suggests creating an environment fostering intrinsic motivations can promote old-age wellbeing.
Researchers develop new strategy for stabilizing siRNAs using ODAGal4, which improves biological and thermal stability without compromising gene-silencing activity. This approach has great potential for siRNA-based therapies and reduces cytotoxicity.
Researchers found that neuronal ATP levels decrease during REM sleep despite increased cerebral blood flow, indicating negative energy balance in neurons. This discovery could lead to novel biomarkers for REM sleep and insights into the brain's energy metabolism.
Research suggests that different α-synuclein aggregate conformations lead to distinct pathologies in neurodegenerative diseases. Suzuki et al. found that α-synuclein fibrils (-) inhibit proteasome activity, leading to accumulation of phosphorylated α-synuclein and ubiquitinated proteins.
A new mouse model shows that injecting synthetic assembled tau protein causes tau accumulation in wild-type mice, spreading to connected regions. This study establishes that tau assembly does not require mutation or overexpression.
Researchers at Tokyo Metropolitan Institute of Medical Science revealed a novel mechanism by which OPTN and ATG9A induce mitophagy, accelerating the autophagic degradation of damaged mitochondria. This interaction is crucial for PINK1/Parkin-mediated mitophagy in Parkinson's disease.
Researchers discovered a novel mode of protein degradation by the UPS under hyperosmotic stress. The proteasome forms nuclear foci that exhibit liquid-like behavior and contain ubiquitylated substrates, facilitating protein degradation. RAD23B is identified as a key molecule that induces phase separation of ubiquitylated proteins.
Cancer cells rely on different factors for survival when DNA replication is blocked. Researchers found that inhibiting a key protein called Cdc7 selectively kills cancer cells by inactivating their safety mechanism. This discovery provides a new strategy for targeting cancer cells and developing anti-cancer agents.
Researchers successfully implanted an artificial neural connection, enabling a paralyzed animal's new cortical site to regain voluntary control of its hand. The study also shows that this technology can impart motor control functions to previously unassociated areas of the cerebral cortex.
A proteoglycan, glypican (Dlp), negatively regulates type I synaptic bouton formation, postsynaptic GluRIIA expression, and larval locomotor speed. Decreases in Dlp expression increase non-canonical BMP signaling, leading to increases in GluRIIA expression, type I bouton number, and locomotion.
Researchers found that engram neurons, responsible for long-term memory, are formed through a transcriptional cycling process involving MAPK and CREB. This discovery has implications for understanding the mechanisms of learning and improving memory, as well as developing treatments for memory impairment.
Researchers found that both internal models are necessary for precise movement: learning to move and where to move. This discovery may lead to the development of new clinical tests and training methods for athletes, particularly those with cerebellar ataxia.
Researchers discovered that subplate neurons form transient synapses with newborn neurons, controlling their migration during fetal brain development. This finding sheds light on the mechanisms regulating neuronal migration and its implications for mental disorders such as autism and schizophrenia.