A novel approach for reliable detection of cathepsin S activities in mouse antigen presenting cells

Alex Steimle, Hubert Kalbacher, Andreas Maurer, Brigitte Beifuss, Annika Bender, Andrea Schäfer, Ricarda Müller, Ingo B. Autenrieth, Julia Stefanie Frick*

*Corresponding author for this work

Research output: Contribution to journalArticleResearchpeer-review

10 Citations (Scopus)


Cathepsin S (CTSS) is a eukaryotic protease mostly expressed in professional antigen presenting cells (APCs). Since CTSS activity regulation plays a role in the pathogenesis of various autoimmune diseases like multiple sclerosis, atherosclerosis, Sjögren's syndrome and psoriasis as well as in cancer progression, there is an ongoing interest in the reliable detection of cathepsin S activity. Various applications have been invented for specific detection of this enzyme. However, most of them have only been shown to be suitable for human samples, do not deliver quantitative results or the experimental procedure requires technical equipment that is not commonly available in a standard laboratory. We have tested a fluorogen substrate, Mca-GRWPPMGLPWE-Lys(Dnp)-DArg-NH2, that has been described to specifically detect CTSS activities in human APCs for its potential use for mouse samples. We have modified the protocol and thereby offer a cheap, easy, reproducible and quick activity assay to detect CTSS activities in mouse APCs. Since most of basic research on CTSS is performed in mice, this method closes a gap and offers a possibility for reliable and quantitative CTSS activity detection that can be performed in almost every laboratory.

Original languageEnglish
Pages (from-to)87-94
Number of pages8
JournalJournal of Immunological Methods
Publication statusPublished - 1 May 2016
Externally publishedYes


  • Autoimmune disease
  • Cathepsin S
  • Enzyme activity
  • IBD
  • Method
  • Mouse
  • Multiple sclerosis


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