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首页> 外文期刊>Materials science & engineering >Self-assembled organic nanoparticles of benzimidazole analogue exhibit enhanced uptake in 3D tumor spheroids and oxidative stress induced cytotoxicity in breast cancer
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Self-assembled organic nanoparticles of benzimidazole analogue exhibit enhanced uptake in 3D tumor spheroids and oxidative stress induced cytotoxicity in breast cancer

机译:苯并咪唑类似物的自组装有机纳米颗粒显示出对3D肿瘤球体的吸收增强以及氧化应激诱导的乳腺癌细胞毒性

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摘要

Organic nanoparticles (ONPs) possess great research interests for their promising effects in the enhancement of bioactivity including anticancer activity with less toxicity. The present study describes the preparation, characterization and biological evaluation of aqueous phase ONPs of potent 1,2-disubstituted benzimidazole derivative (BZ6) for anticancer activity. BZ6-ONPs were characterized through UV-absorption and fluorescence spectroscopic analysis for their photo-physical properties. DLS, TEM and SEM studies were carried out for morphological and structural analysis. Cytotoxicity determination on a panel of four different cancer cell lines (MCF-7, MiaPaca-2, HT-29 and HCT-116) revealed that the BZ6-ONPs show highest activity in human breast cancer MCF-7 cells. Surprisingly, the BZ6-ONPs were found to be non-toxic towards normal breast epithelial fR2 cells. Additionally, the FITC-ONPs showed enhanced uptake in 3D tumor spheroids of MCF-7 cells compared to the free FITC. BZ6-ONPs strongly halted cell proliferation and induced apoptosis, possibly through oxidative stress-mediated reactive oxygen species (ROS) generation and loss of mitochondrial membrane potential (MMP) in MCF-7 cells. Moreover, molecular mechanism-based studies revealed that BZ6-ONPs downregulated AKT/NF-kappa B/vimentin/survivin-mediated oncogenic signaling pathway promoting cell proliferation and malignancy. In a nutshell, BZ6-ONPs are therapeutically efficacious, which needs further development as a treatment option in human mammary gland carcinomas.
机译:有机纳米颗粒(ONPs)在增强生物活性(包括具有较小毒性的抗癌活性)方面具有广阔的前景,因此具有极大的研究兴趣。本研究描述了有效的1,2-二取代苯并咪唑衍生物(BZ6)的水相ONPs的制备,表征和生物学抗癌活性。 BZ6-ONPs通过紫外吸收和荧光光谱分析表征其光物理性质。进行了DLS,TEM和SEM研究,以进行形态和结构分析。对四种不同癌细胞系(MCF-7,MiaPaca-2,HT-29和HCT-116)的细胞毒性测定表明,BZ6-ONPs在人乳腺癌MCF-7细胞中显示出最高活性。出人意料的是,发现BZ6-ONP对正常的乳腺上皮fR2细胞无毒。此外,与游离FITC相比,FITC-ONPs显示MCF-7细胞的3D肿瘤球体摄取增强。 BZ6-ONPs可能通过氧化应激介导的活性氧(ROS)生成和MCF-7细胞线粒体膜电位(MMP)的丧失来强烈阻止细胞增殖并诱导凋亡。此外,基于分子机制的研究表明BZ6-ONPs下调AKT /NF-κB/波形蛋白/ survivin介导的致癌信号通路,促进细胞增殖和恶性肿瘤。简而言之,BZ6-ONP在治疗上是有效的,需要进一步发展作为人类乳腺癌的治疗选择。

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