作者:Vedran Milosavljevic、Yazan Haddad、Miguel Angel Merlos Rodrigo、Amitava Moulick、Hana Polanska、David Hynek、Zbynek Heger、Pavel Kopel、Vojtech Adam
DOI:10.1371/journal.pone.0163983
日期:——
Prostate cancer cells control energy metabolism by chelating intracellular zinc. Thus, zinc delivery has been a popular therapeutic approach for prostate cancer. Here, we propose the use of the membrane-penetrating peptide Novicidin connected to zinc-Schiff base as a carrier vehicle for the delivery of zinc to prostate cells. Mass spectrometry, electrochemistry and spectrophotometry confirmed the formation/stability of this complex and provided insight regarding the availability of zinc for complex interactions. This delivery system showed minor toxicity in normal PNT1A cells and high potency towards PC3 tumor cells. The complex preferentially penetrated PC3 tumor cells in contrast to confinement to the membranes of PNT1A. Furthermore, zinc uptake was confirmed in both cell lines. Molecular analysis was used to confirm the activation of zinc stress (e.g., ZnT-1) and apoptosis (e.g., CASP-1). Our results strongly suggest that the zinc-Schiff base-Novicidin complex has great potential as a novel anticancer drug.
前列腺癌细胞通过螯合细胞内的锌来控制能量代谢。因此,锌的输送一直是治疗前列腺癌的常用方法。在此,我们提出使用与锌-席夫碱相连的膜穿透肽 Novicidin 作为载体,向前列腺细胞输送锌。质谱分析法、电化学和分光光度法证实了这种复合物的形成/稳定性,并提供了关于锌在复合物相互作用中的可用性的见解。这种递送系统对正常的 PNT1A 细胞毒性较小,而对 PC3 肿瘤细胞的效力很高。该复合物优先穿透 PC3 肿瘤细胞,而不是局限在 PNT1A 细胞膜上。此外,锌的吸收在两种细胞系中都得到了证实。分子分析证实了锌应激(如 ZnT-1)和细胞凋亡(如 CASP-1)的激活。我们的研究结果有力地表明,锌-Schiff 碱-Novicidin 复合物作为一种新型抗癌药物具有巨大的潜力。