Discovery of Turn-On Fluorescent Probes for Detecting PDEδ Protein in Living Cells and Tumor Slices
作者:Gaopan Dong、Long Chen、Jing Zhang、Tingting Liu、Lupei Du、Chunquan Sheng、Minyong Li
DOI:10.1021/acs.analchem.0c00335
日期:2020.7.21
The first small-molecule fluorescent turn-on probes for detecting PDEδ protein were rationally designed, showing reasonable fluorescent properties and the fluorescent ability has been applied for visualization of the PDEδ protein in living cells and at tissue levels. The qPCR results showed that the mRNA expression of KRAS, PDEδ, AKT1, MAPK1, MEK7, RAF1, and mTOR were downregulated by probes 1–3 through PI3K/AKT/mTOR and MAPK signal pathways. The probes also can downregulate the protein level of pErk and tErk. Therefore, these small-molecule fluorescent probes are expected to be used in the screening of antipancreatic cancer drugs targeting the PDEδ protein, as well as in obtaining a better understanding of the pathological and physiological roles of PDEδ protein.
针对 PDEδ 蛋白检测的首批小分子荧光开启探针被合理设计出来,显示出合理的荧光性质,并且荧光能力已被应用于活细胞和组织水平上 PDEδ 蛋白的可视化。qPCR 结果表明,通过 PI3K/AKT/mTOR 和 MAPK 信号通路,探针 1-3 下调了KRAS、PDEδ、AKT1、MAPK1、MEK7、RAF1 和 mTOR 的 mRNA 表达。探针还能下调 pErk 和 tErk 的蛋白水平。因此,这些小分子荧光探针有望用于针对 PDEδ 蛋白的抗胰腺癌药物筛选,并有助于更深入地了解 PDEδ 蛋白的病理生理作用。