PuSH - Publication Server of Helmholtz Zentrum München: Neutrophilic cathepsin C is maturated by a multistep proteolytic process and secreted by activated cells during inflammatory lung diseases.

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Hamon, Y.* ; Legowska, M.* ; Herve, V.* ; Dallet-Choisy, S.* ; Marchand-Adam, S.* ; Vanderlynden, L.* ; Demonte, M.* ; Williams, R.* ; Scott, C.J.* ; Si-Tahar, M.* ; Heuze-Vourc'h, N.* ; Lalmanach, G.* ; Jenne, D.* ; Lesner, A.* ; Gauthier, F.* ; Korkmaz, B.*

Neutrophilic cathepsin C is maturated by a multistep proteolytic process and secreted by activated cells during inflammatory lung diseases.

J. Biol. Chem. 291, 8486-8499 (2016)

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Open Access Green as soon as Postprint is submitted to ZB.

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The cysteine protease cathepsin C (CatC) activates granule-associated proinflammatory serine proteases in hematopoietic precursor cells. Its early inhibition in the bone marrow is regarded as a new therapeutic strategy for treating proteolysis-driven chronic inflammatory diseases, but its complete inhibition is elusive in vivo. Controlling the activity of CatC may be achieved by directly inhibiting its activity with a specific inhibitor or/and by preventing its maturation. We have investigated immunochemically and kinetically the occurrence of CatC and its proform in human hematopoietic precursor cells and in differentiated mature immune cells in lung secretions. The maturation of proCatC obeys a multistep mechanism that can be entirely managed by CatS in neutrophilic precursor cells. CatS inhibition by a cell-permeable inhibitor abrogated the release of the heavy and light chains from proCatC and blocked similar to 80% of CatC activity. Under these conditions the activity of neutrophil serine proteases, however, was not abolished in precursor cell cultures. In patients with neutrophilic lung inflammation, mature CatC is found in large amounts in sputa. It is secreted by activated neutrophils as confirmed through lipopolysaccharide administration in a nonhuman primate model. CatS inhibitors currently in clinical trials are expected to decrease the activity of neutrophilic CatC without affecting those of elastase-like serine proteases.

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Publication type Article: Journal article

Document type Scientific Article

Corresponding Author

Keywords Dipeptidyl-peptidase-i; Papillon-lefevre-syndrome; Serine Proteases; Inhibition; Expression; Requires; Granules; Proteinase-3; Gene; Vivo

ISSN (print) / ISBN 0021-9258

e-ISSN 1083-351X

Journal Journal of Biological Chemistry, The

Quellenangaben Volume: 291, Issue: 16, Pages: 8486-8499

Publisher American Society for Biochemistry and Molecular Biology

Publishing Place Bethesda

Non-patent literature Publications

Reviewing status Peer reviewed

Institute(s) Institute of Lung Health and Immunity (LHI)