摘要
目的研究丙泊酚对脂多糖(lipopolysaccharide,LPS)刺激人单核细胞humanmononuclearmacrophagecell,THP-1)丝裂原活化蛋白激酶(mitogen咀ctivatedproteinkinase,MAPK)信号通路的影响。方法将体外培养的THP-1细胞按完全随机方法分为4组:对照组(C组):给予脂肪乳20mg/L;LPS刺激组(L组):给予LPSIOmg/L;丙泊酚处理组(P组):给予丙泊酚20mg/L;丙泊酚处理合并LPS刺激组(P+L组):给予丙泊酚20mgCL及LPS10mg/L。在刺激后0.5、1、2、6h4个时间点通过免疫蛋白印迹分析(Westernblot)法检测磷酸化p38MAPK(p-p38MAPK),磷酸化细胞外信号调节激酶(p-extracellular-sigualregulatedproteinkinase,p-ERK)1/2及磷酸化c-Jun氨基末端激酶(p-c-Junamino-terminalkinase,p-JNK)1/2含量的变化。结果给予LPS刺激THP.1细胞0.5h时,L组p-p38MAPK、p-ERK1/2及p4NKI/2的相对灰度值分别为14.67±0.82、1.34±0.05、4.49±0.51,与C组比较表达均显著增加(P〈0.05)。给予刺激1h时,L组P-p38MAPK、P-ERKl/2及P-JNK1/2的相对灰度值分别为11.78±0.75、0.58±.05、3.31±0.55,与C组比较表达均显著增加(P〈0.05);P+L组p-ERKl/2的相对灰度值为0.14±0.02,与L组比较磷酸化水平显著降低(P〈0.05)。给予刺激2h时,L组p-p38MAPK和p-JNK1/2的相对灰度值分别为15.60±0.96、8.33±0.70,与C组比较表达均显著增加(P〈0.05);P+L组p-p38MAPK和p-JNKI/2的相对灰度值分别为4.52±0.23、1.80±0.70,与L组比较磷酸化水平显著降低(P〈0.05)。给予刺激6h时,L组p-p38MAPK及p-JNK1/2的相对灰度值分别为18.89±1.22、2.58±0.50,与C组比较表达均显著增]/ff(P〈O.05);P+L组p-p38MAPK的相对灰度值为3.91±0.30,与L组比较磷酸化水平显著降低(P〈0.05)。结论丙泊酚抑制由LPS刺激THP-1细胞引起的p-p38MAPK、p-ERK1/2及p-JNK1/2表达增加,这可能是其抗炎的重要作用机制之一。
Objective To study the effects of propofol on the lipopolysaccharide induced activation of mitogen-activated protein kinase(MAPK) pathway in human mononuelear macrophage cells(THP-1 ). Methods Cultured THP-1 cells were randomly divided into four groups: intralipid(the solvent for propofol, 20 mg/L) group (C group), lipopolysaccharide(LPS)(10 mg/L) group (L group), propofol(20 mg/L) group (P group), propofol(20 mg/L) and LPS( 10 mg/L) group (P+L group). The phosphorylation of p38MAPK, extracellular-signal regulated protein kinase (ERK)1/2 and e-Jun amino-terminal kinase (JNK)1/2 were detected by western blot assay at 0.5, 1, 2 h and 6 h after LPS or propofol treatment. Results Compared with C group, the level of p- p38MAPK (relative intensity: 14.67 ±0.82), p -ERK 1/2 ( relative intensity: 1.34±0.05 ) and p -JNKI/2 (relative intensity : 4.49 ±0.51 ) increased dramatically in L group at 0.5 h after LPS treatment (P〈0.05). Compared with C group, the level of p-p38MAPK(relative intensity : 11.78 ±0.75 ), p -ERK1/2 (relative intensity: 0.58±0.05 ) and p -JNK 1/2 (relative intensity : 3.31±0.55 ) in L group increased significantly at 1 h after LPS treatment (P〈0.05). However, the phosphorylation level of p -ERK 1/2 ( relative intensity : 0.14 ±0.02 ) in P+L group was significantly lower than that of L group at 1 h. After LPS treatment 2 h, compared with C group the level of p-p38MAPK(relative intensity: 15.60+0.96) and p-JNK1/2(relative intensity: 8.33±0.70) in L group increased obviously(P〈0.05),but compared with L group, the level of p-p38MAPK (relative intensity: 4.52±0.23), p- JNK1/2 (relative intensity: 1.80±0.70) decreased dramatically in P+L group(P〈0.05). After LPS treatment 6 h, the level of p-p38MAPK(relative intensity: 18.89±1.22) and p-JNK1/2 (relative intensity: 2.58±0.50) increased significantly in L group (P〈0.05) compared with C group, however, the phosphorylation level of p38MAPK (relative intensity: 3.91±0.30) in P+L group was obviously lower than that of L group (P〈0.05). Conclusions In THP-1 cells, LPS can induce the phosphorylation of p38MAPK, ERK1/2 and JNK1/2, however, this effect can be partial inhibited by propofol, with might be the potential mechanism in anti-inflammation effect.
出处
《国际麻醉学与复苏杂志》
CAS
2012年第6期369-372,383,共5页
International Journal of Anesthesiology and Resuscitation
基金
南方医院院长基金(2009A001,2010C013)
2011年度广东省医学科研基金立项课题项目(B2011202)
关键词
丙泊酚
脂多糖
人单核细胞
MAPK通路
磷酸化
Propofol
Lipopolysaccharide
Human mononuclear macrophage cell
mitogen-activated protein kinasepathway
Phosphorylation