title: Light sheet microscopy for single molecule tracking in living tissue.
abstract: Single molecule observation in cells and tissue allows the analysis of physiological processes with molecular detail, but it still represents a major methodological challenge. Here we introduce a microscopic technique that combines light sheet optical sectioning microscopy and ultra sensitive high-speed imaging. By this approach it is possible to observe single fluorescent biomolecules in solution, living cells and even tissue with an unprecedented speed and signal-to-noise ratio deep within the sample. Thereby we could directly observe and track small and large tracer molecules in aqueous solution. Furthermore, we demonstrated the feasibility to visualize the dynamics of single tracer molecules and native messenger ribonucleoprotein particles (mRNPs) in salivary gland cell nuclei of Chironomus tentans larvae up to 200 microm within the specimen with an excellent signal quality. Thus single molecule light sheet based fluorescence microscopy allows analyzing molecular diffusion and interactions in complex biological systems.
authors.affiliation: Institute of Physical and Theoretical Chemistry, Rheinische Friedrich-Wilhelms Universität, Bonn, Germany.
authors.forename: Jörg Gerhard
authors.initials: JG
authors.lastname: Ritter
authors.forename: Roman
authors.initials: R
authors.lastname: Veith
authors.forename: Andreas
authors.initials: A
authors.lastname: Veenendaal
authors.forename: Jan Peter
authors.initials: JP
authors.lastname: Siebrasse
authors.forename: Ulrich
authors.initials: U
authors.lastname: Kubitscheck
mesh_terms: D000818:Animals; D002467:Cell Nucleus / Q000378:metabolism; D002683:Chironomidae / Q000378:metabolism; D008856:Microscopy, Fluorescence / Q000379:methods*; D012261:Ribonucleoproteins / Q000378:metabolism; D012469:Salivary Glands / Q000378:metabolism
chemical_list: D012261:Ribonucleoproteins; C026452:messenger ribonucleoprotein