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Filter sterilization of highly infectious samples to prevent false negative analysis of matrix metalloproteinase activity

Elkington, P.T.G., Green, J.A. and Friedland, J.S. (2006) Filter sterilization of highly infectious samples to prevent false negative analysis of matrix metalloproteinase activity Journal of Immunological Methods, 309, (1-2), pp. 115-119. (doi:10.1016/j.jim.2005.11.010). (PMID:16386754).

Record type: Article

Abstract

Matrix metalloproteinases (MMPs) are implicated in the immunopathology of numerous infectious diseases. High risk samples such as those generated after infection with Mycobacterium tuberculosis require filter sterilization for safe analysis of MMP concentrations. Here, we report that commercial filter membranes may cause artefacts by binding MMPs. Anopore 0.2 microM membrane filtration reduced MMP-1 concentrations to undetectable levels by zymography and Western blotting. Polypropylene 0.45 microM filtration removed some MMP-1, while Polysulphone, Durapore and Bio-inert 0.2 microM membranes did not remove MMP-1. Anopore filtration also removed all MMP-7 and -9 activity, suggesting that the conserved MMP catalytic domain binds the membrane. This study demonstrates the importance of selecting the appropriate filter in MMP analysis to avoid incorrectly excluding MMP involvement in infection-related immunopathology.

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Published date: 20 February 2006
Organisations: Faculty of Medicine

Identifiers

Local EPrints ID: 341071
URI: http://eprints.soton.ac.uk/id/eprint/341071
ISSN: 0022-1759
PURE UUID: 35d1ffb0-6220-4551-a81c-59dfd865c84f
ORCID for P.T.G. Elkington: ORCID iD orcid.org/0000-0003-0390-0613

Catalogue record

Date deposited: 12 Jul 2012 12:58
Last modified: 18 Jul 2017 05:39

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Contributors

Author: J.A. Green
Author: J.S. Friedland

University divisions

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