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Seeing a Mycobacterium-Infected Cell in Nanoscale 3D: Correlative Imaging by Light Microscopy and FIB/SEM Tomography

Beckwith, Marianne; Beckwith, Kai Sandvold; Sikorski, Pawel; Skogaker, Nan Elisabeth Tostrup; Flo, Trude Helen; Halaas, Øyvind
Journal article, Peer reviewed
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URI
http://hdl.handle.net/11250/2364439
Date
2015
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  • Institutt for fysikk [2164]
  • Institutt for klinisk og molekylær medisin [2656]
  • Publikasjoner fra CRIStin - NTNU [26736]
Original version
PLoS ONE 2015   10.1371/journal.pone.0134644
Abstract
Mycobacteria pose a threat to the world health today, with pathogenic and opportunistic bacteria causing tuberculosis and non-tuberculous disease in large parts of the population. Much is still unknown about the interplay between bacteria and host during infection and disease, and more research is needed to meet the challenge of drug resistance and inefficient vaccines. This work establishes a reliable and reproducible method for performing correlative imaging of human macrophages infected with mycobacteria at an ultra-high resolution and in 3D. Focused Ion Beam/Scanning Electron Microscopy (FIB/SEM) tomography is applied, together with confocal fluorescence microscopy for localization of appropriately infected cells. The method is based on an Aclar poly(chloro-tri-fluoro)ethylene substrate, micropatterned into an advantageous geometry by a simple thermomoulding process. The platform increases the throughput and quality of FIB/SEM tomography analyses, and was successfully applied to detail the intracellular environment of a whole mycobacterium-infected macrophage in 3D.
Publisher
Public Library of Science
Journal
PLoS ONE

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