Calpain pp 57-66 | Cite as

In Vivo Monitoring of Calpain Activity by Forster Resonance Energy Transfer

  • William Lostal
  • Daniel Stockholm
  • Isabelle RichardEmail author
Part of the Methods in Molecular Biology book series (MIMB, volume 1915)


Calpains are a 15-member class of calcium-activated nonlysosomal neutral proteases. They are involved in many cellular processes and are highly upregulated in pathological conditions. Some are ubiquitously expressed (CAPN1, CAPN2, CAPN4, CAPN5, CAPN7, and CAPN10), but others are thought to be localized in specific tissues. The monitoring of in vivo calpain activity is required for physiological, pathological, and therapeutic evaluations. This past decade, a tool for monitoring calpain activity in such conditions was developed using Forster resonance energy transfer (FRET). Studies showed that the level of calpain activity correlates with a decrease in FRET between the two fluorescent proteins. This chapter describes the methodologies from the design of the construct to the imaging procedure and analysis to evaluate ubiquitous calpain activity in vivo.

Key words

Calpain activity Muscle fibers In vivo FRET Imaging 


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • William Lostal
    • 1
  • Daniel Stockholm
    • 1
  • Isabelle Richard
    • 1
    Email author
  1. 1.Généthon INSERM, U951, INTEGRARE Research Unit, University Paris–SaclayEvryFrance

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