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http://dx.doi.org/10.5352/JLS.2018.28.11.1361

Anti-inflammatory Effect of Heat-Killed Enterococcus faecalis, EF-2001  

Choi, Moon-Suk (Division of Biological Science and Technology, Yonsei University)
Chang, Sang-Jin (Division of Biological Science and Technology, Yonsei University)
Chae, Yuri (Division of Biological Science and Technology, Yonsei University)
Lee, Myung-Hun (Division of Biological Science and Technology, Yonsei University)
Kim, Wan-Joong (Division of Biological Science and Technology, Yonsei University)
Iwasa, Masahiro (Division of Biological Science and Technology, Yonsei University)
Han, Kwon-Il (Division of Biological Science and Technology, Yonsei University)
Kim, Wan-Jae (Research & Development Center, Korea BeRM Co. Ltd.)
Kim, Tack-Joong (Division of Biological Science and Technology, Yonsei University)
Publication Information
Journal of Life Science / v.28, no.11, 2018 , pp. 1361-1368 More about this Journal
Abstract
Inflammation is the most common condition in the human body. Tissue damage triggers inflammation, together with vasodilation and increased blood flow at the inflamed site, resulting in edema. Inflammatory responses are also triggered by lipopolysaccharide (LPS), a Toll-like receptor Enterococcus faecalis, a gram-positive organism, has been reported to possess immunomodulatory and preventive activities; however, its use may present risks of sepsis and other systemic infections. Heat-killed Enterococcus faecalis (EF-2001) has been reported to induce antitumor activity, but its effects on inflammation are not known. In the present study, we investigated the effect of EF-2001 on LPS-induced macrophage inflammatory responses. EF-2001 treatment reduced nitric oxide (NO) production, indicating suppression of inflammatory reactions. EF-2001 showed no cytotoxicity in macrophages. Further investigation of the anti-inflammatory mechanism of EF-2001 indicated that EF-2001 reduced the LPS-induced expression of inducible nitric oxide synthase and cyclooxygenase-2. EF-2001 also reduced f the LPS induction of several inflammatory molecules involved in the nuclear factor-${\kappa}B$ ($NF-{\kappa}B$) and mitogen-activated protein kinase pathways, including ERK, JNK, and p38 phosphorylation, in a concentration-dependent manner. Additionally, EF-2001 inhibited Akt phosphorylation and increased the expression of the inhibitory ${\kappa}B$ ($I{\kappa}B$) protein, an inhibitor of $NF-{\kappa}B$. EF-2001 also inhibited the nuclear translocation of p65. These results suggest that EF-2001 has anti-inflammatory properties and may be useful for treating inflammatory diseases.
Keywords
Cyclooxygenase-2; EF-2001; Enterococcus faecalis; inducible nitric oxide synthase; inflammation;
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Times Cited By KSCI : 7  (Citation Analysis)
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