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J Cell Sci. 2020 Mar 9. pii: jcs.238964. doi: 10.1242/jcs.238964. [Epub ahead of print]

Poji: a Fiji-based tool for analysis of podosomes and associated proteins.

Author information

1
Institute for Medical Microbiology, Virology and Hygiene, University Medical Center Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
2
Department of Cell Biology, Radboud Institute for Molecular Life Sciences, Radboud university medical center, Geert Grooteplein Zuid 26-28, 6525 GA Nijmegen, The Netherlands.
3
Institute for Medical Microbiology, Virology and Hygiene, University Medical Center Eppendorf, Martinistr. 52, 20246 Hamburg, Germany s.linder@uke.de.

Abstract

Podosomes are actin-based adhesion and invasion structures in a variety of cell types, with podosome-forming cells displaying up to several hundreds of these structures. Podosome number, distribution and composition can be affected by experimental treatments or during regular turnover, necessitating a tool that is able to detect even subtle differences in podosomal properties. Here, we present a Fiji-based macro code termed "Poji" ("podosome analysis by Fiji"), which serves as an easy-to-use tool to characterise a variety of cellular and podosomal parameters including area, fluorescence intensity, relative enrichment of associated proteins, and radial podosome intensity profiles. This tool should be useful to gain more detailed insight into regulation, architecture and functions of podosomes. Moreover, we show that Poji is easily adaptable for the analysis of invadopodia and associated extracellular matrix degradation, and likely also of other micron-size punctate structures. This article describes the work flow of the Poji macro, presents several examples of its applications, and also points out limitations, as well as respective solutions, and adaptable features to streamline the analysis.

KEYWORDS:

Actin; Fiji; Invadopodia; LSP1; Macro; Myosin; Podosomes; Vinculin

PMID:
32152182
DOI:
10.1242/jcs.238964

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