Cathepsin G in Experimental Tuberculosis: Relevance for Antibacterial Protection and Potential for Immunotherapy

The Journal of Immunology : Official Journal of the American Association of Immunologists
Kerstin WalterStefan Ehlers

Abstract

Neutrophil serine proteases, such as cathepsin G (CG) and neutrophil elastase (NE), have been implicated in the protective response against infections, including experimental mycobacterial infections. The goal of this study was to explore the role of CG in immunocompetent mice challenged aerogenically with Mycobacterium tuberculosis. We used genetically CG- or CG/NE-deficient mice to define the importance of these neutrophil serine proteases for antibacterial protection, granulomatous response, and survival. In addition, we explored the effect of intratracheally delivered liposomally encapsulated CG/NE as a therapeutic approach early during M. tuberculosis infection. Our data show that the presence of CG or CG/NE prolongs survival in M. tuberculosis-infected mice. However, CG is not directly involved in antibacterial defenses, and exogenous intratracheal administration of CG combined with NE does not reduce bacterial loads in the lungs of M. tuberculosis-infected mice.

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Citations

May 28, 2016·Laboratory Animals·Alice MirandaJorge Correia-Pinto
Mar 4, 2017·Developmental and Comparative Immunology·R Villagra-BlancoC Hermosilla
Sep 14, 2019·Journal of Peptide Science : an Official Publication of the European Peptide Society·Sutharsana YathursanVijayalekshmi Sarojini
Nov 23, 2017·Frontiers in Immunology·Javier Arranz-TrullénEster Boix

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