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학술저널
저자정보
이경희 (서울대학교) 이창훈 (서울대학교) 우지수 (서울대학교) 정지영 (서울대학교) 장안희 (서울대학교) 유철규 (서울대학교)
저널정보
한국분자세포생물학회 Molecules and Cells Molecules and Cells 제41권 제4호
발행연도
2018.3
수록면
282 - 289 (8page)
DOI
10.14348/molcells.2018.2123

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Interleukin-17A (IL-17A) is a pro-inflammatory cytokine mainly derived from T helper 17 cells and is known to be involved in the pathogenesis of chronic obstructive pulmonary disease (COPD). Cigarette smoke (CS) has been considered as a primary risk factor of COPD. However, the interaction between CS and IL-17A and the underlying molecular mechanisms have not been clarified. In the current study, we investigated the effects of cigarette smoke extract (CSE) on IL-17A-induced IL-8 production in human bronchial epithelial cells, and sought to identify the underlying molecular mechanisms. IL-8 production was significantly enhanced following treatment with both IL-17A and CSE, while treatment with either IL-17A or CSE alone caused only a slight increase in IL-8 production. CSE increased the transcription of IL-17RA/RC and surface membrane expression of IL-17R, which was suppressed by an inhibitor of the phosphoinositide 3-kinase (PI3K)/Akt pathway (LY294002). CSE caused inactivation of glycogen synthase kinase-3β (GSK-3β) via the PI3K/Akt pathway. Blockade of GSK-3β inactivation by overexpression of constitutively active GSK-3β (S9A) completely suppressed the CSE-induced up-regulation of IL-17R expression and the CSE-induced enhancement of IL-8 secretion. In conclusion, inactivation of GSK-3β via the PI3K/Akt pathway mediates CSE-induced up-regulation of IL-17R, which contributes to the enhancement of IL-17A-induced IL-8 production.

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