Near-Infrared Fluorescent Probe for Imaging and Evaluating the Role of Vanin-1 in Chemotherapy
作者:Pengpeng Lu、Caiyun Zhang、Lili Fu、Yinghui Wei、Yan Huang、Xiaoyan Wang、Changjun Lv、Lingxin Chen
DOI:10.1021/acs.analchem.1c02386
日期:2021.7.27
Pantetheinase (also known as Vanin-1) is highly expressed in the liver, kidneys, and intestine and is closely associated with a number of diseases. Vanin-1 can hydrolyze pantetheine to pantothenic acid (vitamin B5) and cysteamine and participate in the synthesis of glutathione (GSH). GSH is highly expressed in tumor cells and plays a major role in the resistance of tumor cells to cisplatin. Therefore, we urgently need a method to monitor the activity level of Vanin-1 in tumor cells and tissues and elucidate the relationship between the role of Vanin-1 in GSH synthesis and tumor resistance. Herein, we report a Cy-Pa fluorescent probe for imaging Vanin-1 in cells and in vivo that can qualitatively and quantitatively detect the fluctuation of Vanin-1 concentrations in HepG2 and HepG2/DDP cells or tumor tissues of tumor-bearing mice. This probe shows excellent potential in in situ real-time monitoring of endogenous Vanin-1. Moreover, we proved that Vanin-1 can inhibit GSH synthesis using the probe. When the Vanin-1 inhibitor RR6 was used in combination with cisplatin, HepG2 and HepG2/DDP cells showed increased resistance to cisplatin, while the therapeutic efficiency of cisplatin was reduced in HepG2 and HepG2/DDP xenografts. In this study, Vanin-1 was shown to play an important role in the treatment of cancer, and the study of Vanin-1 may provide an idea for the treatment of cancer in the future.
泛硫乙氨酸酶(又称 Vanin-1)在肝脏、肾脏和肠道中高度表达,与多种疾病密切相关。Vanin-1 可将泛硫乙氨酸水解为泛酸(维生素 B5)和半胱胺,并参与谷胱甘肽(GSH)的合成。GSH 在肿瘤细胞中高表达,在肿瘤细胞对顺铂的耐药性中起着重要作用。因此,我们迫切需要一种方法来监测 Vanin-1 在肿瘤细胞和组织中的活性水平,并阐明 Vanin-1 在 GSH 合成中的作用与肿瘤耐药性之间的关系。在此,我们报告了一种用于细胞和体内 Vanin-1 成像的 Cy-Pa 荧光探针,它可以定性和定量检测 HepG2 和 HepG2/DDP 细胞或肿瘤小鼠肿瘤组织中 Vanin-1 浓度的波动。该探针在原位实时监测内源性 Vanin-1 方面显示出卓越的潜力。此外,我们还利用该探针证明了 Vanin-1 能抑制 GSH 的合成。当Vanin-1抑制剂RR6与顺铂联合使用时,HepG2和HepG2/DDP细胞对顺铂的耐药性增强,而顺铂在HepG2和HepG2/DDP异种移植中的治疗效率降低。这项研究表明,Vanin-1在癌症治疗中发挥着重要作用,对Vanin-1的研究或许能为未来的癌症治疗提供一种思路。