| Autor: |
Happel KI; Section of Pulmonary and Critical Care Medicine, Louisiana State University Health Sciences Center, New Orleans, LA 70112, USA., Dubin PJ, Zheng M, Ghilardi N, Lockhart C, Quinton LJ, Odden AR, Shellito JE, Bagby GJ, Nelson S, Kolls JK |
| Jazyk: |
angličtina |
| Zdroj: |
The Journal of experimental medicine [J Exp Med] 2005 Sep 19; Vol. 202 (6), pp. 761-9. Date of Electronic Publication: 2005 Sep 12. |
| DOI: |
10.1084/jem.20050193 |
| Abstrakt: |
Interleukin (IL)-23 is a heterodimeric cytokine that shares the identical p40 subunit as IL-12 but exhibits a unique p19 subunit similar to IL-12 p35. IL-12/23 p40, interferon gamma (IFN-gamma), and IL-17 are critical for host defense against Klebsiella pneumoniae. In vitro, K. pneumoniae-pulsed dendritic cell culture supernatants elicit T cell IL-17 production in a IL-23-dependent manner. However, the importance of IL-23 during in vivo pulmonary challenge is unknown. We show that IL-12/23 p40-deficient mice are exquisitely sensitive to intrapulmonary K. pneumoniae inoculation and that IL-23 p19-/-, IL-17R-/-, and IL-12 p35-/- mice also show increased susceptibility to infection. p40-/- mice fail to generate pulmonary IFN-gamma, IL-17, or IL-17F responses to infection, whereas p35-/- mice show normal IL-17 and IL-17F induction but reduced IFN-gamma. Lung IL-17 and IL-17F production in p19-/- mice was dramatically reduced, and this strain showed substantial mortality from a sublethal dose of bacteria (10(3) CFU), despite normal IFN-gamma induction. Administration of IL-17 restored bacterial control in p19-/- mice and to a lesser degree in p40-/- mice, suggesting an additional host defense requirement for IFN-gamma in this strain. Together, these data demonstrate independent requirements for IL-12 and IL-23 in pulmonary host defense against K. pneumoniae, the former of which is required for IFN-gamma expression and the latter of which is required for IL-17 production. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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