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Cigarette smoke-induced accumulation of lung dendritic cells is interleukin-1α-dependent in mice.

Abstract：

BACKGROUND:Evidence suggests that dendritic cells accumulate in the lungs of COPD patients and correlate with disease severity. We investigated the importance of IL-1R1 and its ligands IL-1α and β to dendritic cell accumulation and maturation in response to cigarette smoke exposure. METHODS:Mice were exposed to cigarette smoke using a whole body smoke exposure system. IL-1R1-, TLR4-, and IL-1α-deficient mice, as well as anti-IL-1α and anti-IL-1β blocking antibodies were used to study the importance of IL-1R1 and TLR4 to dendritic cell accumulation and activation. RESULTS:Acute and chronic cigarette smoke exposure led to increased frequency of lung dendritic cells. Accumulation and activation of dendritic cells was IL-1R1/IL-1α dependent, but TLR4- and IL-1β-independent. Corroborating the cellular data, expression of CCL20, a potent dendritic cells chemoattractant, was IL-1R1/IL-1α-dependent. Studies using IL-1R1 bone marrow-chimeric mice revealed the importance of IL-1R1 signaling on lung structural cells for CCL20 expression. Consistent with the importance of dendritic cells in T cell activation, we observed decreased CD4+ and CD8+ T cell activation in cigarette smoke-exposed IL-1R1-deficient mice. CONCLUSION:Our findings convey the importance of IL-1R1/IL-1α to the recruitment and activation of dendritic cells in response to cigarette smoke exposure.

journal_name

Respir Res

journal_title

Respiratory research

authors

Botelho FM,Nikota JK,Bauer CM,Morissette MC,Iwakura Y,Kolbeck R,Finch D,Humbles AA,Stämpfli MR

doi

10.1186/1465-9921-13-81

subject

Has Abstract

pub_date

2012-09-19 00:00:00

pages

81

eissn

1465-9921

issn

1465-993X

pii

1465-9921-13-81

journal_volume

13

pub_type

杂志文章

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