苯肾上腺素荧光标记物的合成及其生物活性的鉴定

目的:合成α1-肾上腺素受体特异性激动剂--苯肾上腺素(phenylephrine,PE)荧光标记物,检测其药理学生物活性.方法:用化学合成的方法将绿色荧光染料BODIPY-FL和PE进行微量缩合反应,薄层色谱法分离和纯化,用薄层色谱和质谱分析对其纯度和分子结构进行鉴定.通过分子生物学Western blot方法检测其药理学生物活性.结果:将BODIPY-FL与PE在无水、无氧和避光条件下进行羧合反应,经薄层色谱分离、纯化得到具有荧光的新化合物--BODIPY-FL-PE,结构经紫外光谱和质谱分析得到证实.Western blot实验表明BODIPY-FL-PE与PE同样具有激动α1-肾上腺素受体,使胞外信号调节激酶(extracellular signal-regulated kinase,ERK)激活的药理作用.结论:经微量缩合反应合成的BODIPY-FL-PE具有α1-肾上腺素受体激动剂药理学特性,可以用于肾上腺素受体行为观测,为进一步研究活细胞中肾上腺素受体的动态行为提供了工具.

Synthesis of BODIPY-FL-labeled phenylephrine and the determination of its biological activity

OBJECTIVE: To synthesize BODIPY-FL-labeled phenylephrine (BODIPY-FL-PE) and determine its biological activity. METHODS: Condensation of BODIPY-FL (green fluorescence dye) and phenylephrine (alpha1-adrenoceptor agonist) was performed by adding dicyclohexylcarbodiimide (DCC) in the presence of absolute tetrahydrofuran(THF). The reaction occurred in absolutely oxygen and water condition at room temperature. The crude product was separated and purified by thin-layer chromatography (TLC). The structure of BODIPY-FL-PE was characterized by TLC and mass spectrometry (MS). Its pharmabiological activity was determined by Western blot. RESULTS: BODIPY-FL-PE,the target molecule, was synthesized and its structure was identified by using ultra-violet spectrometry (UV) and MS. The result of Western blot indicated that alpha1-adrenoceptor (alpha1-AR) induced ERK phosphorylation was confirmed in both BODIPY-FL-PE and PE treated groups. CONCLUSION: The synthesized BODIPY-FL-PE has pharmacological activity that could activate alpha1-AR. Visualization of AR behaviors could be achieved by tracing the trajectories of BODIPY-FL-PE labeled AR. It might be a promising tool for investigating dynamic behaviors of AR in living cells.