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2017 ; 130
(1
): 278-291
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3D correlative light and electron microscopy of cultured cells using serial
blockface scanning electron microscopy
#MMPMID27445312
Russell MR
; Lerner TR
; Burden JJ
; Nkwe DO
; Pelchen-Matthews A
; Domart MC
; Durgan J
; Weston A
; Jones ML
; Peddie CJ
; Carzaniga R
; Florey O
; Marsh M
; Gutierrez MG
; Collinson LM
J Cell Sci
2017[Jan]; 130
(1
): 278-291
PMID27445312
show ga
The processes of life take place in multiple dimensions, but imaging these
processes in even three dimensions is challenging. Here, we describe a workflow
for 3D correlative light and electron microscopy (CLEM) of cell monolayers using
fluorescence microscopy to identify and follow biological events, combined with
serial blockface scanning electron microscopy to analyse the underlying
ultrastructure. The workflow encompasses all steps from cell culture to sample
processing, imaging strategy, and 3D image processing and analysis. We
demonstrate successful application of the workflow to three studies, each aiming
to better understand complex and dynamic biological processes, including
bacterial and viral infections of cultured cells and formation of entotic
cell-in-cell structures commonly observed in tumours. Our workflow revealed new
insight into the replicative niche of Mycobacterium tuberculosis in primary human
lymphatic endothelial cells, HIV-1 in human monocyte-derived macrophages, and the
composition of the entotic vacuole. The broad application of this 3D CLEM
technique will make it a useful addition to the correlative imaging toolbox for
biomedical research.