References
Query Results -- Details
MGI Accession ID: MGI:3841312
J Number: J:147498
Other Accession IDs:
Title: Lipocalin 2 is required for pulmonary host defense against Klebsiella infection.
Authors: Chan YR; Liu JS; Pociask DA; Zheng M; Mietzner TA; Berger T; Mak TW; Clifton MC; Strong RK; Ray P; Kolls JK
Journal: J Immunol
Volume: 182
Issue: 8
Date: 2009 Apr 15
Year: 2009
Pages: 4947-56
Review Status: Peer Reviewed
Abstract:
Antimicrobial proteins comprise a significant component of the acute innate immune response to infection. They are induced by pattern recognition receptors as well as by cytokines of the innate and adaptive immune pathways and play important roles in infection control and immunomodulatory homeostasis. Lipocalin 2 (siderocalin, NGAL, 24p3), a siderophore-binding antimicrobial protein, is critical for control of systemic infection with Escherichia coli; however, its role in mucosal immunity in the respiratory tract is unknown. In this study, we found that lipocalin 2 is rapidly and robustly induced by Klebsiella pneumoniae infection and is TLR4 dependent. IL-1beta and IL-17 also individually induce lipocalin 2. Mucosal administration of IL-1beta alone could reconstitute the lipocalin 2 deficiency in TLR4 knockout animals and rescue them from infection. Lipocalin 2-deficient animals have impaired lung bacterial clearance in this model and mucosal reconstitution of lipocalin 2 protein in these animals resulted in rescue of this phenotype. We conclude that lipocalin 2 is a crucial component of mucosal immune defense against pulmonary infection with K. pneumoniae.
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