摘要
目的:观察皮肤成纤维细胞在某些条件下释放的细胞因子对肝细胞急性期反应的影响。方法：用细菌脂多糖孵育人的皮肤成纤维细胞，测定培养液中IL－1β和IL－6浓度；并用不同浓度和组合的细胞培养液、重组IL－6（rhIL－6）和地塞米松孵育鼠肝瘤H4细胞，观察白蛋白、α1酸糖蛋白、α1抗胰蛋白酶和转铁蛋白mRNA表达的变化。结果：发现细菌脂多糖刺激成纤维细胞合成IL－6，而地塞米松抑制这一作用。IL－6和细菌脂多糖孵育的成纤维细胞培养液抑制白蛋白mRNA的表达，成纤维细胞培养液。地塞米松促进α1酸糖蛋白、α1抗胰蛋白酶mRNA的表达、单用IL－6即能抑制白蛋白和转铁蛋白mRNA的表达，地塞米松加强IL－6和成纤维细胞培养液的抑制作用。结论：（1）细菌脂多糖处理的成纤维细胞能够分泌IL－6，但不分泌11－1β；（2）成纤维细胞产生的细胞因子能够调节急性期反应时的肝脏蛋白合成；（3）地塞米松抑制成纤维细胞产生IL－6，但加强其刺激急性期反应的能力。
To test the hypothesis that dermal fibroblasts (DF) are an important source of cytokines which elicit major changes in hepatic synthesis of acute phase reactants(APRs). Metkods: Condi-tioned medium(CM) from human DF challenged with bacterial lipopolysaccharide (I,PS) was collected andIL-10 and IL-6 levels were measured- The ability of DF conditioned medium(fLPS) and dexamethasone(Dex) to mediate an hepatic acute phase response was tested on rat hepatoma H4 cells- Various concentra-tions and combinations of CM (±LPS), recombinant IL-6 (rhIL-6) and Dex were tested for their abilitiesto stimulate albumin, Q,-acid glycoprotein (AGP), a,-antitrypsin (AT) and transferrin mRNA synthesis.Results: LPS stimulated IL-6 production by DF and Dex inhibited this producti0n. IL-6 and CM+LPS in-hibited the production of albumin mRNA,while the expression of AT and AGP 0ccurred 0nly with CM+LPS+Dex. However,IL-6 alone had an inhibitory effect 0n albumin and transferrin mRNA producti0n.Dex maximized the effects 0f lL-6 and CM, and was essential f0r AGP gene expression. C0nclusion: (l)LPS-treated human DF can secrete IL-6, but not IL-101 (2)DF may als0 pr0duce other cyt0kines whichmodulate hepatic pr0tein synthesis during the acute phase response l (3) Dex inhibits IL-6 production byDF, but enhances its ability to stimulate the acute phase response.
出处
《第二军医大学学报》
CAS
CSCD
北大核心
1997年第1期24-27,共4页
Academic Journal of Second Military Medical University
基金
国家自然科学基金!39470709
关键词
脂多糖
成纤维细胞
细胞因子
肝脏
急性期反应物
bacterial lipopolysaccharide
fibroblasts
cytokines
acute phase response
