表皮生长因子受体酪氨酸激酶抑制剂高通量筛选模型的建立
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国家自然科学基金重点项目(30330640),国家自然科学基金(30170901),国家科技部重大科技专项(2002AA2Z3130).


Establishment of high throughput screening model for epidermal growth factor receptor tyrosine kinase inhibitor
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Supported by the Key Program of National Natural Science Foundation of China(30330640),National Natural Science Foundation of China(30170901) and Grant of National Science and Technology R&D Program (2002AA2Z3130).

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    目的:建立表皮生长因子受体(epidermal growth factor receptor,EGFR)酪氨酸激酶(receptor tyrosine kinase,RTK)抑制剂的高通量筛选模型。方法:通过基因工程技术表达EGFR-RTK,ELISA法验证其生物学活性;应用表面等离子共振原理筛选与激酶具有结合活性的化合物,ELISA法检测其生物学活性。结果:在原核表达系统中成功表达具有生物学活性的EGFR-RTK蛋白。将蛋白偶联至生物芯片,阳性化合物EI 188与EGFR酪氨酸激酶结合的Kd值为5.00×10-7 mol·L-1,IC50为12.37 μmol·L-1,与预期结果一致。应用该模型筛选31个待测化合物,发现了6个具有结合活性和酶抑制活性的EGFR-RTK抑制剂。结论:成功建立了基于表面等离子共振原理和ELISA法的高通量EGFR-RTK抑制剂的筛选模型,为发现新型酪氨酸激酶抑制剂奠定了基础。

    Abstract:

    Objective:To establish a high throughput screening (HTS) model for epidermal growth factor (EGF) receptor tyrosine kinase (RTK) inhibitor. Methods: The bioactive EGFR-RTK was expressed by genetic engineering technology. The binding activity and bioactivity of the compounds were examined by surface plasmon resonance and ELISA. Results: The bioactive EGFR-RTK protein was successfully expressed in the prokaryotic expression system and was immobilized on the sensor chip. The equilibrium constants (Kd) between TKI (EI 188) and RTK was 5.00×10-7 mol·L-1 ,and the IC50 was 12.37 μmol·L-1,which was consistent with expected. With this model we screened 31 compounds and found that 6 compounds had binding activity and inhibitory activity. Conclusion: A novel HTS model of EGFR-TKI has been successfully established using surface plasmon resonance biosensor and ELISA, which lays a foundation for discovery of new TKIs.

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  • 收稿日期:2009-09-04
  • 最后修改日期:2009-11-27
  • 录用日期:2009-12-11
  • 在线发布日期: 2009-12-16
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