Versteeg H H, Nijhuis E, van den Brink G R, Evertzen M, Pynaert G N, van Deventer S J, Coffer P J, Peppelenbosch M P
Laboratory for Experimental Internal Medicine, G2-130, Academic Medical Centre, Meibergdreef 9, NL-1105 AZ Amsterdam, The Netherlands.
Biochem J. 2000 Sep 15;350 Pt 3(Pt 3):717-22.
Assaying activation of signal transduction is laborious and does not allow the study of large numbers of samples, essential for high-throughput drug screens or for large groups of patients. Using phosphospecific antibodies, we have developed ELISA techniques enabling non-radioactive semi-quantitative assessment of the activation state of p42/p44 mitogen-activated protein kinase (MAPK), p38 MAPK, protein kinase B and the transcription factor cAMP-response-element-binding protein (CREB) in 96-well plates. This assay has been termed PACE (phosphospecific antibody cell-based ELISA) and was used successfully for both adherent and suspension cells. Various stimuli induced dose-dependent enzymic activity of which the kinetics closely correlated with those measured via classical methodology. Using PACE we have now characterized for the first time the concentration-dependent effects of various inflammatory prostaglandins on CREB phosphorylation in macrophages. PACE is a straightforward and novel technique enabling the large-scale analysis of signal transduction.
检测信号转导的激活过程既费力又无法对大量样本进行研究,而这对于高通量药物筛选或大量患者群体来说至关重要。我们利用磷酸特异性抗体开发了酶联免疫吸附测定(ELISA)技术,能够在96孔板中对p42/p44丝裂原活化蛋白激酶(MAPK)、p38 MAPK、蛋白激酶B和转录因子环磷酸腺苷反应元件结合蛋白(CREB)的激活状态进行非放射性半定量评估。该检测方法被称为PACE(基于磷酸特异性抗体的细胞酶联免疫吸附测定),已成功应用于贴壁细胞和悬浮细胞。各种刺激诱导了剂量依赖性酶活性,其动力学与通过经典方法测得的结果密切相关。利用PACE,我们首次表征了各种炎性前列腺素对巨噬细胞中CREB磷酸化的浓度依赖性影响。PACE是一种简单新颖的技术,能够对信号转导进行大规模分析。