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Immunological characterisation of different meprin species in mice
A V Flannery1, G C Macadam, R J Beynon
1Department of Biochemistry, University of Liverpool, U.K.
Abstract:
Meprin-a is a metalloendopeptidase present at high levels in the kidney brush border of some inbred mouse strains. Meprin-b is a latent metallo-endopeptidase, activated by trypsin-mediated proteolysis in vitro, that is present at similar activities (after activation) in all mouse strains. Meprin (a mixture of a and b forms) was purified from a high-meprin Mep-1a/a animal, and Lys-C peptides of this preparation were sequenced. The sequence data were used to direct the synthesis of peptides that were conjugated to albumin and used as immunogens. One of these antisera was specific to meprin-b and thus provided a specific tool to monitor expression of this form of meprin in different mouse strains.
Insights
Researchers developed a specific antibody to detect meprin-beta, a kidney enzyme. This tool helps study meprin-beta expression differences across various mouse strains, advancing research on this metalloendopeptidase.
Area of Science:
- Biochemistry
- Immunology
- Nephrology
Background:
- Meprin-a is a metalloendopeptidase found in high concentrations in the kidney brush border of specific inbred mouse strains.
- Meprin-b is a latent metalloendopeptidase, activated by trypsin, with similar activity levels across all mouse strains after activation.
Purpose of the Study:
- To develop a specific tool for monitoring meprin-beta expression in different mouse strains.
- To enable differential analysis of meprin-a and meprin-b in biological samples.
Main Methods:
- Purification of meprin (a and b forms) from a high-meprin Mep-1a/a mouse strain.
- Lys-C peptide sequencing of the purified meprin preparation.
- Synthesis of peptides based on sequence data, conjugated to albumin for use as immunogens.
- Generation and characterization of antisera, identifying one specific to meprin-b.
Main Results:
- Successful sequencing of Lys-C peptides from purified meprin.
- Development of a highly specific antiserum targeting meprin-b.
- Demonstration of a tool to differentiate and monitor meprin-b expression.
Conclusions:
- A specific antiserum for meprin-b was successfully generated.
- This antiserum provides a valuable tool for studying meprin-b expression patterns in various mouse strains.
- The findings facilitate further research into the distinct roles and regulation of meprin-a and meprin-b.