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Sub-5 nm Silicon Nanopore Sensors: Scalable Fabrication via Self-Limiting Metal-Assisted Chemical Etching.
ACS Appl Mater Interfaces
January 2025
Division of Micro and Nanosystems, KTH Royal Institute of Technology, Malvinas väg 10, Stockholm 100 44, Sweden.
Solid-state nanopores offer unique possibilities for biomolecule sensing; however, scalable production of sub-5 nm pores with precise diameter control remains a manufacturing challenge. In this work, we developed a scalable method to fabricate sub-5 nm nanopores in silicon (Si) nanomembranes through metal-assisted chemical etching (MACE) using gold nanoparticles. Notably, we present a previously unreported self-limiting effect that enables sub-5 nm nanopore formation from both 10 and 40 nm nanoparticles in the 12 nm thick monocrystalline device layer of a silicon-on-insulator substrate.
View Article and Find Full Text PDFenterotoxin-claudin pore complex: Models for structure, mechanism of pore assembly and cation permeability.
Comput Struct Biotechnol J
December 2024
Clinical Physiology/Nutritional Medicine, Department of Gastroenterology, Rheumatology and Infectious Diseases, Charité - Universitätsmedizin Berlin, Corporate Member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Hindenburgdamm 30, 12203 Berlin, Germany.
The pore-forming enterotoxin (CPE), a common cause of foodborne diseases, facilitates Ca influx in enterocytes, leading to cell damage. Upon binding to certain claudins (e.g.
View Article and Find Full Text PDFAnalyzing the Linker Structure of PROTACs throughout the Induction Process: Computational Insights.
J Med Chem
January 2025
College of Pharmacy, Chongqing Medical University, Chongqing 400016, China.
Linker structures are a crucial component of proteolysis-targeting chimeras (PROTACs) and have traditionally been designed based on empirical methods, which presents significant challenges in the development of PROTACs. Current optimization strategies typically focus on reducing the number of rotatable bonds in the linker to limit conformational freedom. However, this approach overlooks the complexity of the target protein degradation process.
View Article and Find Full Text PDFVitamin D3/VDR alleviates double-stranded RNA virus -induced biliary epithelial cell damage by inhibiting autophagy.
BMC Gastroenterol
January 2025
Department of Pediatrics, First Affiliated Hospital of Xi'an Jiaotong University, Xi'an, Shaanxi Province, 710061, China.
Background: The increased apoptosis of bile duct epithelial cells (BECs) due to some damage factors is considered the initiating factor in the occurrence and progression of biliary atresia (BA). Vitamin D receptor (VDR) is thought to play a crucial role in maintaining the intrinsic immune balance and integrity of bile duct epithelial cells (BECs). To investigate the role of VDRs in the pathogenesis and progression of BA using in vitro and in vivo models.
View Article and Find Full Text PDFOutside-in engineering of cadherin endocytosis using a conformation strengthening antibody.
Nat Commun
January 2025
Biophysics Graduate Group, University of California, Davis, CA, USA.
P-cadherin, a crucial cell-cell adhesion protein which is overexpressed in numerous malignant cancers, is a popular target for drug delivery antibodies. However, molecular guidelines for engineering antibodies that can be internalized upon binding to P-cadherin are unknown. Here, we use a combination of biophysical, biochemical, and cell biological methods to demonstrate that trapping the P-cadherin extracellular region in an X-dimer adhesive conformation triggers cadherin endocytosis via an outside-in signaling mechanism.
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