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Photoactivatable Quantum Dots in Super-Resolution Microscopy of Muscle

Super-resolution 3D imaging was achieved using newly synthesized photoactivatable quantum dot (PAQ dot) probes. Quantum dots were modified with a novel quencher system to make them photoactivatable. The unique properties of these PAQ dots enable single-fluorophore localization in three dimensions using a confocal microscopy optical sectioning method. Myosin and tropomyosin of rabbit myofibrilar bundles were specifically labeled with the newly synthesized PAQ dot. A sufficient number of single quantum dots were photoactivated, localized and reduced to their centroid and then reconstructed to a super-resolution image. The acquired super-resolution image shows a lateral and an axial sub-diffraction resolution and demonstrates ultrafine striations with widths less than 70 nm that are not evident by conventional confocal microscopy. The striations appear to be related to nebulin thin filament binding protein. This newly developed imaging system is cutting edge for its high resolution and localization as well its simplicity and convenience.

Identiferoai:union.ndltd.org:unt.edu/info:ark/67531/metadc33133
Date12 1900
CreatorsAkel, Amal
ContributorsRoot, Douglas D., Benjamin, Robert C., Conrad-Webb, Heather M.
PublisherUniversity of North Texas
Source SetsUniversity of North Texas
LanguageEnglish
Detected LanguageEnglish
TypeThesis or Dissertation
Formatviii, 72 p.: ill., Text
RightsPublic, Copyright, Akel, Amal, Copyright is held by the author, unless otherwise noted. All rights reserved.

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