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[Rebamipide inhibited expression of TLR4 and TNF-alpha release in pulmonary epithelial cell line A549 induced by lipopolysaccharide].
Zhong Nan da Xue Xue Bao. Yi Xue Ban = Journal of Central South University. Medical Sciences 2009 May
OBJECTIVE: To determine the effect of rebamipide on the expression of Toll-like recepter 4 (TLR4) and TNF-alpha release in pulmonary epithelial cell line A549.
METHODS: Lipopolysaccharide (LPS) was used to induce A549 in vitro, which was divided into 4 groups: a control group, a model group(LPS), and 2 intervention groups (10 mg/L rebamipide plus LPS; 30 mg/L rebamipide plus LPS). TNF-alpha release was detected with ELISA and expression of TLR4 was detected with RT-PCR and Western blot.
RESULTS: A549 cells were stimulated with LPS and TNF-alpha release was increased compared with the control group (P<0.01), peaking at 6 h. Expression of TLR4 was also increased compared with the control group (P<0.01), but it was inhibited by rebamipide compared with the model group (P<0.05). There was no significant difference between the 2 intervention groups (P>0.05).
CONCLUSION: The antiinflammatory mechanism of rebamipide may be reducing cytokine release by inhibiting TLR4 expression. Rebamipide may be used as a supplementary anti-infection drug.
METHODS: Lipopolysaccharide (LPS) was used to induce A549 in vitro, which was divided into 4 groups: a control group, a model group(LPS), and 2 intervention groups (10 mg/L rebamipide plus LPS; 30 mg/L rebamipide plus LPS). TNF-alpha release was detected with ELISA and expression of TLR4 was detected with RT-PCR and Western blot.
RESULTS: A549 cells were stimulated with LPS and TNF-alpha release was increased compared with the control group (P<0.01), peaking at 6 h. Expression of TLR4 was also increased compared with the control group (P<0.01), but it was inhibited by rebamipide compared with the model group (P<0.05). There was no significant difference between the 2 intervention groups (P>0.05).
CONCLUSION: The antiinflammatory mechanism of rebamipide may be reducing cytokine release by inhibiting TLR4 expression. Rebamipide may be used as a supplementary anti-infection drug.
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