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Interferometric scattering (iSCAT) microscopy enables high-speed and label-free detection of individual molecules and small nanoparticles. Here we apply point spread function engineering to provide adaptive control of iSCAT images using spatial light modulation. With this approach, we demonstrate improved dynamic spatial filtering, real-time background subtraction, focus control, and signal modulation based on sample orientation.
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http://dx.doi.org/10.1111/jmi.13347 | DOI Listing |
Nature
September 2025
Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Key Laboratory of RNA Innovation Science and Engineering, Chinese Academy of Sciences, University of Chinese Academy of Sciences, Shanghai, China.
Antigen-induced clustering of cell surface receptors, including T cell receptors and Fc receptors, represents a widespread mechanism in cell signalling activation. However, most naturally occurring antigens, such as tumour-associated antigens, stimulate limited receptor clustering and on-target responses owing to insufficient density. Here we repurpose proximity labelling, a method used to biotinylate and identify spatially proximal proteins, to amplify designed probes as synthetic antigen clusters on the cell surface.
View Article and Find Full Text PDFLight Sci Appl
September 2025
National Laboratory of Solid State Microstructures, Key Laboratory of Intelligent Optical Sensing and Manipulation, College of Engineering and Applied Sciences, Nanjing University, 210023, Nanjing, China.
Planar optical elements incorporating space-varying Pancharatnam-Berry phase have revolutionized the manipulation of light fields by enabling continuous control over amplitude, phase, and polarization. While previous research focusing on linear functionalities using apolar liquid crystals (LCs) has attracted much attention, extending this concept to the nonlinear regime offers unprecedented opportunities for advanced optical processing. Here, we demonstrate the reconfigurable nonlinear Pancharatnam-Berry LC diffractive optics in photopatterned ion-doped ferroelectric nematics.
View Article and Find Full Text PDFBackground: Staphylococcus epidermidis (SE) is a predominant hospital-acquired bacterium leading to late-onset sepsis in preterm infants. Recent findings have suggested that postnatal S. epidermidis infection is associated with short-term neurodevelopmental consequences.
View Article and Find Full Text PDFMol Biol Cell
September 2025
Department of Life Sciences, Ben-Gurion University of the Negev, Beer Sheva 84105, Israel.
The ESCRT machinery mediates membrane remodeling in fundamental cellular processes including cytokinesis, endosomal sorting, nuclear envelope reformation, and membrane repair. Membrane constriction and scission is driven by the filament-forming ESCRT-III complex and the AAA-ATPase VPS4. While ESCRT-III-driven membrane scission is generally established, the mechanisms governing the assembly and coordination of its twelve mammalian isoforms in cells remain poorly understood.
View Article and Find Full Text PDFACS Nano
September 2025
State Key Laboratory of Chemo and Biosensing, College of Chemistry and Chemical Engineering, Hunan University, Changsha 410082, China.
Optical imaging offers high sensitivity and specificity for noninvasive cancer detection, but conventional techniques suffer from limited probe accumulation, tissue autofluorescence, and poor depth resolution. Afterglow luminescence overcomes autofluorescence by emitting persistent light after excitation, yet its utility in vivo remains hindered by weak tumor enrichment and two-dimensional readouts lacking spatial context. Here, we report luminescent-magnetic nanoparticles (LM-NPs) coencapsulating luminescent trianthracene (TA) molecules and iron oxide cores within the amphiphilic polymer pluronic-F127.
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