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Dynamic fingerprinting of sub-cellular nanostructures by image mean square displacement analysis.
Digiacomo, Luca; D'Autilia, Francesca; Durso, William; Tentori, Paolo Maria; Caracciolo, Giulio; Cardarelli, Francesco.
Afiliação
  • Digiacomo L; Department of Molecular Medicine, "La Sapienza" University of Rome, Roma, Italy.
  • D'Autilia F; Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Pisa, Italy.
  • Durso W; Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Pisa, Italy.
  • Tentori PM; Center for Nanotechnology Innovation@NEST, Istituto Italiano di Tecnologia, Pisa, Italy.
  • Caracciolo G; Department of Molecular Medicine, "La Sapienza" University of Rome, Roma, Italy. giulio.caracciolo@uniroma1.it.
  • Cardarelli F; NEST - Scuola Normale Superiore, Istituto Nanoscienze - CNR (CNR-NANO), Pisa, Italy. francesco.cardarelli@nano.cnr.it.
Sci Rep ; 7(1): 14836, 2017 11 01.
Article em En | MEDLINE | ID: mdl-29093485
Here we provide demonstration that image mean square displacement (iMSD) analysis is a fast and robust platform to address living matter dynamic organization at the level of sub-cellular nanostructures (e.g. endocytic vesicles, early/late endosomes, lysosomes), with no a-priori knowledge of the system, and no need to extract single trajectories. From each iMSD, a unique triplet of average parameters (namely: diffusivity, anomalous coefficient, size) are extracted and represented in a 3D parametric space, where clustering of single-cell points readily defines the structure "dynamic fingerprint", at the whole-cell-population level. We demonstrate that different sub-cellular structures segregate into separate regions of the parametric space. The potency of this approach is further proved through application to two exemplary, still controversial, cases: i) the intracellular trafficking of lysosomes, comprising both free diffusion and directed motion along cytoskeletal components, and ii) the evolving dynamic properties of macropinosomes, passing from early to late stages of intracellular trafficking. We strongly believe this strategy may represent a flexible, multiplexed platform to address the dynamic properties of living matter at the sub-cellular level, both in the physiological and pathological state.
Assuntos

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Endossomos / Endocitose / Lisossomos Idioma: En Ano de publicação: 2017 Tipo de documento: Article

Texto completo: 1 Base de dados: MEDLINE Assunto principal: Endossomos / Endocitose / Lisossomos Idioma: En Ano de publicação: 2017 Tipo de documento: Article