MIT scientists turn chaotic laser light into powerful brain imaging tool

MIT researchers harness chaotic laser light to create a focused 'pencil beam' that images the blood-brain barrier 25 times faster, offering real-time drug tracking for neurological treatments. | Contesto: cronaca

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• MIT scientists turn chaotic laser light into powerful brain imaging tool

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In a breakthrough that could reshape neurological drug development, scientists at the Massachusetts Institute of Technology have discovered that chaotic laser light, typically prone to scattering, can spontaneously form a highly focused beam under precise conditions. This unexpected phenomenon, which they call a 'pencil beam,' has enabled them to image the blood-brain barrier in 3D at speeds 25 times faster than existing techniques, according to a study published by the university. The discovery emerged from experiments where researchers observed that what was once considered unusable, erratic laser light could be harnessed to produce a stable, concentrated beam. The key lies in specific parameters that allow the chaotic light to self-organize, avoiding the scattering that usually limits imaging depth and resolution. This new method not only captures the intricate structure of the blood-brain barrier—a protective layer that blocks most drugs from reaching the brain—but does so with unprecedented speed. Beyond structural imaging, the technique allows researchers to watch how drugs move into brain cells in real time. This capability is critical for understanding why many potential treatments for neurological diseases like Alzheimer’s, Parkinson’s, and brain cancer fail to cross the barrier effectively. By tracking drug molecules as they interact with the barrier, scientists can identify which compounds are most likely to reach their targets, potentially cutting years off the development cycle. The blood-brain barrier has long been a major hurdle in medicine, preventing over 98% of small-molecule drugs from entering the brain. Current imaging methods, such as two-photon microscopy, are slow and often require invasive procedures or contrast agents. The MIT team’s approach offers a non-invasive, high-speed alternative that could be adapted for use in living animals, and eventually humans, without the need for genetic modifications or chemical labels. If validated in broader studies, the technique could dramatically accelerate the development of treatments for neurological diseases. Pharmaceutical companies currently spend billions on drug candidates that fail in...

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Categoria: cronaca