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Leukotriene B4 receptor BLT-mediated phosphorylation of NF-κB and CREB is involved in IL-8 production in human mast cells induced by Trichomonas vaginalis-derived secretory products

 Young Hee Nam  ;  Deulle Min  ;  Myeong Heon Shin  ;  Seong Hoon Kim  ;  Young Ah Lee  ;  Kyeong Ah Kim  ;  Kyoung-Ju Song  ;  Hyoung-Pyo Kim 
 Microbes and Infection, Vol.13(14-15) : 1211-1220, 2011 
Journal Title
 Microbes and Infection 
Issue Date
Trichomonas vaginalis is a protozoan parasite that causes acute tissue inflammation in vaginal trichomoniasis. In this study, we investigated the signaling mechanisms through which T. vaginalis-derived secretory products (TvSP) induce chemokine IL-8 production in human mast cells. Stimulation with TvSP induced up-regulation of IL-8 protein secretion in HMC-1 cells. In addition, TvSP induced phosphorylation of transcription factors NF-κB and CREB in HMC-1 cells. Pretreatment of TvSP with lipase, but not heat or proteinase K strongly abolished the stimulatory effect on IL-8 production. Moreover, TvSP-induced IL-8 production and phosphorylation of NF-κB or CREB were inhibited when HMC-1 cells were stimulated with modified TvSP collected from 5-lipooxygenase inhibitor-treated trichomonads. Indeed, T. vaginalis-secreted lipid mediator LTB(4) (700pg/ml) from 1×10(7) trichomonads. Furthermore, pretreatment of HMC-1 cells with antagonists for LTB(4) receptors BLT1 or BLT2 abolished the stimulatory effects of TvSP. Finally, TvSP-induced IL-8 production was inhibited by pretreatment with IκB or CREB inhibitors. These results suggest that T. vaginalis-derived secretory lipid mediator LTB(4) induces IL-8 production in mast cells via BLT-dependent activation of NF-κB and CREB.
Appears in Collections:
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Dept. of Environmental Medical Biology (환경의생물학교실)
1. Journal Papers (연구논문) > 1. College of Medicine (의과대학) > Yonsei Biomedical Research Center (연세의생명연구원)
Yonsei Authors
김경아(Kim, Kyung Ah) ; 김형표(Kim, Hyoung Pyo) ; 남영희(Nam, Young Hee) ; 민아림(Min, A Rim) ; 송경주(Song, Kyoung Ju) ; 신명헌(Shin, Myeong Heon) ; 이영아(Lee, Young Ah)
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