脂多糖刺激牙龈成纤维细胞产生白细胞介素11、6的研究

目的观察牙龈卟啉单胞菌（Porphyromonas gingivalis，Pg）、伴放线放线杆菌（Actinobacillus actinomycetemcomitans，Aa）、大肠杆菌（Escherichia coli，Ec）的脂多糖（lipopolysacchrides，LPS）刺激人牙龈成纤维细胞（human gingival fibroblasts，HGF）合成白细胞介素（interleukin，IL）-11和IL-6的能力，并了解内源性前列腺素是否介导IL-11和IL-6的产生。方法将3种浓度的LPS（0．1、1、10mg／L）分别作用于体外培养的HGF 24h，另外在10mg／L的LPS中加入10^-6 moL／L的吲哚美辛后再分别刺激HGF 24h，ELISA法检测HGF上清液中IL-11和IL-6含量的变化。结果Aa-，Ec-LPS（10mg／L）和Pg-LPS（1、10mg／L）刺激HGF后IL-11水平显著提高；Pg-，Ec-LPS（0．1、1、10mg／L）和Aa-LPS（1、10ms／L）刺激HGF产生IL-6的水平明显增高；这些作用均受到吲哚美辛的抑制作用。结论LPS使HGF产生IL-11和IL-6的水平明显增加，并受到内源性前列腺素的正向调控。

Production of interleukin-11 and interleukin-6 in cultured human gingival fibroblasts with the stimulation of lipopolysacchrides

OBJECTIVE: To observe the effects of Porphyromonas gingivalis (Pg), Actinobacillus actinomycetemcomitans (Aa), Escherichia coli (Ec) lipopolysacchrides (LPS) on the production of IL-11 and IL-6 from healthy human gingival fibroblasts (HGF), and the effects of endogenous prostaglandin on HGF IL-11 and IL-6 production stimulated with the above LPS. METHODS: HGF were stimulated with Pg-, Aa-, Ec-LPS of different concentrations (0.1, 1, 10 mg/L) for 24 h. And HGF were also stimulated with the combinations of 10 mg/L Pg-, Aa-, Ec-LPS and 10(-6) mol/L indomethacin respectively for 24 h. Levels of IL-11 and IL-6 in the supernatants were quantitated by ELISA. RESULTS: LPS from Aa, Ec, at the concentration of 10 mg/L and from Pg at the concentrations 1, 10 mg/L significantly augmented IL-11 production by HGF. IL-6 production was also significantly increased by stimulation with Aa-LPS at concentrations 1, 10 mg/L and with Ec-, Pg-LPS at concentrations 0.1, 1, 10 mg/L. In addition, IL-11 production was lower than IL-6 production by HGF stimulated with LPS. Indomethacin significantly inhibited IL-6 and IL-11 production in LPS-stimulated HGF. CONCLUSIONS: Aa-, Pg-, Ec-LPS may significantly increase IL-11 and IL-6 level in the supernatants of HGF, and endogenous prostaglandin may upregulate IL-11 and IL-6 production in LPS-stimulated HGF.