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Demonstrates resolving protein aggregates and condensates in live organisms, indicating new diagnostic potential.
Protein assemblies, including aggregates and condensates, are closely linked to health and diseases. We demonstrate boxcar-enhanced Fluorescence-detected mid-Infrared photothermaL Microscopy (FILM), using two model species, Caenorhabditis elegans and Saccharomyces cerevisiae , to quantitatively resolve these protein states in vivo by imaging β-sheet and α-helix secondary structures and analyzing their ratios. This method directly distinguishes polyglutamine (PolyQ) protein aggregates, α-synuclein protein condensates, and P-granule condensates implicated in neurodegenerative diseases and embryonic development in live organisms. It further enables the unraveling of protein assembly dynamics and their physio-pathological roles, such as age-related progression of PolyQ from condensates to aggregates.
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Weinberg et al. (2026) studied this question.
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