化学
癌症研究
乳腺癌
癌症
磷酸二酯酶
内科学
酶
生物化学
医学
作者
Mitsuyasu Kawaguchi,Xiang Fu Han,Tomoka Hisada,Sayaka Nishikawa,Kuniyuki Kano,Naoya Ieda,Junken Aoki,Tatsuya Toyama,Hidehiko Nakagawa
标识
DOI:10.1021/acs.jmedchem.9b01213
摘要
Ectonucleotide pyrophosphatase/phosphodiesterase 1 (ENPP1) is a type II transmembrane glycoprotein that is involved in bone metabolism and insulin resistance, hydrolyzes 2',3'-cGAMP (a STING ligand that promotes innate immunity), and is associated with cancer stemness in breast cancers and glioblastoma. Therefore, ENPP1 is considered a candidate therapeutic target and/or biomarker for early diagnosis of malignant tumors. In this study, we designed and synthesized a sensitive ENPP1 fluorescence probe, Tokyo Green (TG) mAMP. We used it to screen a chemical library for non-phosphate ENPP1 inhibitors. Structural optimization of a selected hit afforded a potent and specific ENPP1 inhibitor. We further found that ENPP1 mRNA expression in tissue samples from patients with triple-negative breast cancer was significantly inversely related to recurrence-free survival (RFS) and overall survival (OS), and TG-mAMP assay revealed a significant difference in ENPP1 activity between ENPP1 high-expressing and ENPP1 low-expressing samples. Our results suggest that TG-mAMP assay might be a rapid and inexpensive tool for predicting the prognosis of patients with malignant breast cancers.
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