Bis-Demethoxy Curcumin Analog Nanoparticles: Synthesis, Characterization, and Anticancer Activity <I>In Vitro</I>
作者:Arul Prakash Francis、Prakhya Balakrishna Murthy、Thiyagarajan Devasena
DOI:10.1166/jnn.2014.9219
日期:2014.7.1
We have optimized a protocol for the preparation of bisdemethoxy curcumin analog nanoparticles (BDMCA-NP) by the solvent assisted process. The structural similarities between bulk and nano BDMCA were determined by Co-TLC, NMR and FTIR. This shows that our synthesis protocol enhanced the dispersibility and reduce the size of BDMCA without altering the integrity of functional moieties and structure, which is crucial for anticancer and antioxidant activities. The morphology and size of BDMCA-NP as determined by SEM, HRTEM and DLS was found to be around 80 nm. BDMCA-NP treated breast cancer cell lines (MCF 7) showed cell death as characterized by MTT assay. Flow cytometric analysis of BDMCA-NP treated MCF 7 cell lines showed an increase of cell count in G2/M phase indicates the cell cycle arrest. Western blot analysis revealed the presence of caspase 3, caspase 9, cleaved fragments of PARP and Bax proteins in the BDMCA-NP treated MCF 7 cell lines, but not in untreated cell lines. To recap, we have prepared BDMCA-NP by solvent assisted process, which exerted anticancer activity against breast cancer cells, which may be due to (i) enhanced dispersibility and surface: volume ratio, (ii) apoptosis (iii) mitochondrial pathway induced cell death, (iv) G2/M phase cell cycle arrest and (v) disassembly of mitotic spindle of the cancer cells. Thus, nano BDMCA can be used as a potent anticancer agent.
我们优化了溶剂辅助工艺制备双去甲氧基姜黄素类似物纳米粒子(BDMCA-NP)的方案。通过 Co-TLC、核磁共振和傅立叶变换红外光谱测定了散装和纳米 BDMCA 的结构相似性。这表明,我们的合成方案提高了 BDMCA 的分散性并减小了其尺寸,同时没有改变其功能分子和结构的完整性,而这正是其抗癌和抗氧化活性的关键所在。经 SEM、HRTEM 和 DLS 测定,BDMCA-NP 的形态和尺寸约为 80 nm。经 BDMCA-NP 处理的乳腺癌细胞系(MCF 7)在 MTT 试验中出现细胞死亡。经 BDMCA-NP 处理的 MCF 7 细胞系的流式细胞分析表明,G2/M 期细胞数量增加,表明细胞周期停止。Western 印迹分析显示,BDMCA-NP 处理的 MCF 7 细胞系中存在 caspase 3、caspase 9、PARP 的裂解片段和 Bax 蛋白,而未处理的细胞系中则没有。综上所述,我们通过溶剂辅助工艺制备的 BDMCA-NP 对乳腺癌细胞具有抗癌活性,这可能是由于:(1)增强了分散性和表面体积比;(2)细胞凋亡;(3)线粒体途径诱导细胞死亡;(4)G2/M 期细胞周期停滞;(5)癌细胞有丝分裂纺锤体解体。因此,纳米 BDMCA 可用作一种有效的抗癌剂。