Blab Tech
MIT and Broad Institute Develop Angstrom-Precision Super-Resolution Imaging Platform
Researchers at the Massachusetts Institute of Technology and the Broad Institute of MIT and Harvard have unveiled a new super‑resolution imaging technique that reaches sub‑angstrom localization precision. The platform, dubbed U‑STORM (Upconversion‑enabled Stochastic Optical Reconstruction Microscopy), was detailed in an open‑access paper published on July 27 in Nature Nanotechnology.
U‑STORM hinges on compositionally engineered upconverting nanoparticles (UCNPs) that blink spontaneously and indefinitely when illuminated with continuous near‑infrared light. Traditional stochastic optical reconstruction microscopy (STORM) relies on the stochastic blinking of fluorescent dyes, which fade rapidly and demand intricate imaging buffers. UCNPs had long been considered photostable and non‑blinking, rendering them unsuitable for STORM. The MIT/Broad team demonstrated that small (~10 nm) core‑shell UCNPs can be coaxed into spontaneous blinking by precise control of their composition. Importantly, this blinking persists without oxygen scavengers, external optical modulation, or specialized buffers.
The authors recorded more than 88,000 localization events from a single particle, achieving a localization precision of 0.6 Å—three orders of magnitude finer than the nanometer limits imposed by conventional fluorescent dyes. Because UCNPs emit distinct colors under the same near‑infrared laser, U‑STORM can capture multiple colors simultaneously. This eliminates the need for sequential imaging rounds and simplifies the experimental workflow. The platform was showcased by mapping epidermal growth factor receptor dimers and multimers in live cells under physiological conditions.
Beyond delivering unprecedented resolution, the work establishes a new design principle for lanthanide nanomaterials. The researchers plan to expand the color palette, shrink particle size, and boost brightness. They also intend to apply U‑STORM to investigate complex nanoscale protein assemblies and cellular signaling pathways.
The publication marks a significant leap in optical microscopy. By combining sub‑angstrom precision with a buffer‑free, streamlined workflow, U‑STORM offers laboratories worldwide a more accessible route to high‑precision molecular imaging.
Current status: The U‑STORM method has been peer‑reviewed and published. The research group is refining the nanoparticle design and preparing to apply the technique to a broader array of biological questions. No regulatory actions or legal proceedings have been reported.
U‑STORM hinges on compositionally engineered upconverting nanoparticles (UCNPs) that blink spontaneously and indefinitely when illuminated with continuous near‑infrared light. Traditional stochastic optical reconstruction microscopy (STORM) relies on the stochastic blinking of fluorescent dyes, which fade rapidly and demand intricate imaging buffers. UCNPs had long been considered photostable and non‑blinking, rendering them unsuitable for STORM. The MIT/Broad team demonstrated that small (~10 nm) core‑shell UCNPs can be coaxed into spontaneous blinking by precise control of their composition. Importantly, this blinking persists without oxygen scavengers, external optical modulation, or specialized buffers.
The authors recorded more than 88,000 localization events from a single particle, achieving a localization precision of 0.6 Å—three orders of magnitude finer than the nanometer limits imposed by conventional fluorescent dyes. Because UCNPs emit distinct colors under the same near‑infrared laser, U‑STORM can capture multiple colors simultaneously. This eliminates the need for sequential imaging rounds and simplifies the experimental workflow. The platform was showcased by mapping epidermal growth factor receptor dimers and multimers in live cells under physiological conditions.
Beyond delivering unprecedented resolution, the work establishes a new design principle for lanthanide nanomaterials. The researchers plan to expand the color palette, shrink particle size, and boost brightness. They also intend to apply U‑STORM to investigate complex nanoscale protein assemblies and cellular signaling pathways.
The publication marks a significant leap in optical microscopy. By combining sub‑angstrom precision with a buffer‑free, streamlined workflow, U‑STORM offers laboratories worldwide a more accessible route to high‑precision molecular imaging.
Current status: The U‑STORM method has been peer‑reviewed and published. The research group is refining the nanoparticle design and preparing to apply the technique to a broader array of biological questions. No regulatory actions or legal proceedings have been reported.
