Role of Polymorphonuclear Leukocyte-Derived Serine Proteinases in Defense against Actinobacillus actinomycetemcomitans
Identifieur interne : 001A58 ( Ncbi/Checkpoint ); précédent : 001A57; suivant : 001A59Role of Polymorphonuclear Leukocyte-Derived Serine Proteinases in Defense against Actinobacillus actinomycetemcomitans
Auteurs : Susanne F. De Haar ; Pieter S. Hiemstra ; Martijn T. J. M. Van Steenbergen ; Vincent Everts ; Wouter BeertsenSource :
- Infection and Immunity [ 0019-9567 ] ; 2006.
Abstract
Periodontitis is a chronic destructive infection of the tooth-supportive tissues, which is caused by pathogenic bacteria such as
Url:
DOI: 10.1128/IAI.02016-05
PubMed: 16926422
PubMed Central: 1594863
Affiliations:
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PMC:1594863Le document en format XML
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<author><name sortKey="Everts, Vincent" sort="Everts, Vincent" uniqKey="Everts V" first="Vincent" last="Everts">Vincent Everts</name>
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<author><name sortKey="De Haar, Susanne F" sort="De Haar, Susanne F" uniqKey="De Haar S" first="Susanne F." last="De Haar">Susanne F. De Haar</name>
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<series><title level="j">Infection and Immunity</title>
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<front><div type="abstract" xml:lang="en"><p>Periodontitis is a chronic destructive infection of the tooth-supportive tissues, which is caused by pathogenic bacteria such as <italic>Actinobacillus actinomycetemcomitans</italic>
. A severe form of periodontitis is found in Papillon-Lefèvre syndrome (PLS), an inheritable disease caused by loss-of-function mutations in the cathepsin C gene. Recently, we demonstrated that these patients lack the activity of the polymorphonuclear leukocyte (PMN)-derived serine proteinases elastase, cathepsin G, and proteinase 3. In the present study we identified possible pathways along which serine proteinases may be involved in the defense against <italic>A. actinomycetemcomitans</italic>
. Serine proteinases are capable to convert the PMN-derived hCAP-18 into LL-37, an antimicrobial peptide with activity against <italic>A. actinomycetemcomitans</italic>
. We found that the PMNs of PLS patients released lower levels of LL-37. Furthermore, because of their deficiency in serine proteases, the PMNs of PLS patients were incapable of neutralizing the leukotoxin produced by this pathogen, which resulted in increased cell damage. Finally, the capacity of PMNs from PLS patients to kill <italic>A. actinomycetemcomitans</italic>
in an anaerobic environment, such as that found in the periodontal pocket, seemed to be reduced. Our report demonstrates a mechanism that suggests a direct link between an inheritable defect in PMN functioning and difficulty in coping with a periodontitis-associated pathogen.</p>
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<name sortKey="De Haar, Susanne F" sort="De Haar, Susanne F" uniqKey="De Haar S" first="Susanne F." last="De Haar">Susanne F. De Haar</name>
<name sortKey="Everts, Vincent" sort="Everts, Vincent" uniqKey="Everts V" first="Vincent" last="Everts">Vincent Everts</name>
<name sortKey="Hiemstra, Pieter S" sort="Hiemstra, Pieter S" uniqKey="Hiemstra P" first="Pieter S." last="Hiemstra">Pieter S. Hiemstra</name>
<name sortKey="Van Steenbergen, Martijn T J M" sort="Van Steenbergen, Martijn T J M" uniqKey="Van Steenbergen M" first="Martijn T. J. M." last="Van Steenbergen">Martijn T. J. M. Van Steenbergen</name>
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