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Development of a brain-penetrant G9a methylase inhibitor to target Alzheimer's disease-associated proteopathology

1 year 6 months ago
Current Aβ-targeting therapeutics for Alzheimer's disease (AD) only slow cognitive decline due to poor understanding of AD pathogenesis. Here we describe a mechanism of AD pathogenesis in which the histone methyltransferase G9a noncanonically regulates translation of hippocampal proteins associated with AD pathology. Correspondingly, we developed a brain-penetrant inhibitor of G9a, MS1262, which restored both age-related learning & memory and noncognitive functions in multiple AD mouse models....
Ling Xie

Revealing the location and dynamics of a concealed binding site in the dopamine transporter

1 year 6 months ago
The dopamine transporter (DAT) is linked to neuropsychiatric disorders including ADHD, Parkinson's disease, and substance use disorders. Accordingly, DAT is the target of illicit drugs and clinically important medicines. However, the number and function of ligand binding sites in DAT is enigmatic due to conflicting data from available structures and molecular pharmacology. Herein, we design force sensors with DAT ligands and measure their interaction forces with wild-type and mutated DATs, from...
Rong Zhu

Phylogenetic divergence of GABA<sub>B</sub> receptor signaling in neocortical networks over adult life

1 year 6 months ago
Cortical circuit activity is controlled by GABA-mediated inhibition in a spatiotemporally restricted manner. GABA(B) receptor (GABA(B)R) signalling exerts powerful slow inhibition that controls synaptic, dendritic and neuronal activity. But, how GABA(B)Rs contribute to circuit-level inhibition over the lifespan of rodents and humans is poorly understood. In this study, we quantitatively determined the functional contribution of GABA(B)R signalling to pre- and postsynaptic domains in rat and...
Max A Wilson

Impaired ketogenesis in Leydig Cells drives testicular aging

1 year 6 months ago
Testicular aging commonly leads to testosterone deficiency and impaired spermatogenesis, yet the underlying mechanisms remain elusive. Here, we show that Leydig cells are particularly vulnerable to aging processes in testis. Single-cell RNA sequencing identifies the expression of Hmgcs2, the gene encoding rate-limiting enzyme of ketogenesis, decreases significantly in Leydig cells from aged mice. Additionally, the concentrations of ketone bodies β-hydroxybutyric acid and acetoacetic acid in...
Congyuan Liu

How extreme rainfall and failing dams unleashed the Derna flood disaster

1 year 6 months ago
On September 11, 2023, Storm Daniel unleashed unprecedented rainfall over the Wadi Derna watershed, triggering one of the most devastating floods in modern history, striking Derna, a coastal city in Libya. This study reconstructs the disaster using an integrated modeling approach that combines satellite imagery, hydrologic, hydraulic, and geotechnical simulations, machine learning, eyewitness accounts, and digital elevation data to assess the impact of cascading dam failures. Our findings reveal...
Ayman Mokhtar Nemnem