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The Nijmegen Hemostasis Assay: Simultaneous Fluorogenic Measurement of Thrombin and Plasmin Generation in a Single Well
Published on: February 27, 2026
165
Tailor made plasmin substrates as potential diagnostic tool to test for mastitis
Floris J Bikker1, Gerrit Koop, Naomi B Leusink
1Department of Oral Biochemistry, Academic Centre for Dentistry Amsterdam, University of Amsterdam and VU University Amsterdam, Gustav Mahlerlaan 3004, 1081 LA, Amsterdam, The Netherlands, fbikker@acta.nl.
Veterinary Research Communications
|July 7, 2014
Summary
Researchers designed novel fluorogenic substrates to detect plasmin, an enzyme elevated in mastitis. These substrates offer a rapid method for differentiating healthy milk from mastitic milk.
Area of Science:
- Biochemistry
- Veterinary Medicine
- Analytical Chemistry
Background:
- Plasmin is a milk protease whose concentration increases during mastitis.
- Current mastitis detection methods can be time-consuming.
Purpose of the Study:
- To design and characterize novel fluorogenic substrates specific for plasmin.
- To evaluate the potential of these substrates for distinguishing healthy milk from mastitic milk.
Main Methods:
- Design of six novel plasmin-specific fluorogenic substrates based on plasmin's specificity matrix.
- Characterization of substrate specificity and sensitivity.
- Testing for cross-reactivity with bacterial proteases.
- Proof-of-concept study using milk samples.
Main Results:
- Six novel plasmin-specific substrates were successfully designed and characterized.
- Eight substrates demonstrated insensitivity to plasmin as expected.
- The designed substrates showed no cross-reactivity with mastitogenic bacterial proteases in vitro.
- A proof of concept demonstrated the ability to differentiate healthy from mastitic milk.
Conclusions:
- Novel fluorogenic substrates offer high specificity for plasmin.
- These substrates can potentially serve as a rapid diagnostic tool for mastitis detection in milk.
- This approach may provide a faster alternative to existing mastitis detection methodologies.
