返回 
加入收藏
共载阿霉素与小干扰RNA的脂质介孔硅纳米粒的制备表征及抗多药耐药肿瘤细胞研究
x
请在关注微信后，向客服人员索取文件
| 篇名： | 共载阿霉素与小干扰RNA的脂质介孔硅纳米粒的制备表征及抗多药耐药肿瘤细胞研究 |
| TITLE： | Preparation and characterization of doxorubicin and siRNA co-loaded CLMSNs and study on anti-multidrug-resistant tumor cells |
| 摘要： | 目的 制备共载阿霉素（DOX）与小干扰RNA（siRNA）的脂质介孔硅纳米粒（CLMSNs-SS-NH2@DOX/siRNA），并对其进行表征及抗多药耐药肿瘤细胞研究。方法先以介孔硅纳米粒（MSNs）为基础制备MSNs-SS-NH2@DOX，并以阳离子脂质体（CLs）对其包覆制得CLMSNs-SS-NH2@DOX，进一步负载siRNA即得CLMSNs-SS-NH2@DOX/siRNA。测定该制剂粒径及Zeta电位，观察其微观形态并进行差示扫描量热分析、X射线衍射分析、红外光谱分析、物理吸附分析；测定该制剂在不同pH条件下（pH5.0、pH7.4）及不同谷胱甘肽浓度下（0、2、5、10mmol/L）DOX的体外释放度；考察该制剂对耐DOX型乳腺癌细胞MCF-7/ADR摄取、迁移、凋亡、周期及P-糖蛋白（P-gp）表达的影响。结果CLMSNs-SS-NH2@DOX/siRNA结构清晰，表面脂膜层明显，粒径为（197.63±3.75）nm，Zeta电位为（20.64±0.98）mV，理化性质良好。体外释放结果显示，CLMSNs-SS-NH2@DOX/siRNA具有良好的pH/还原双重响应释药特性。细胞实验结果显示，经CLMSNs-SS-NH2@DOX/siRNA干预后，MCF-7/ADR细胞的药物摄取显著增强，迁移率和P-gp表达水平均显著降低，总凋亡比例和G0/G1期所占比例均显著升高（P＜0.05）。结论本研究成功制备同时负载DOX和siRNA的CLMSNs-SS-NH2@DOX/siRNA；该制剂理化性质良好，具有pH/还原双重响应释药特性，且可通过下调P-gp表达逆转MCF-7/ADR细胞多药耐药。 |
| ABSTRACT： | OBJECTIVE To prepare lipid-coated mesoporous silica nanoparticles （CLMSNs） co-loaded with doxorubicin （DOX） and siRNA （CLMSNs-SS-NH2@DOX/siRNA），and to characterize it and study anti-multidrug-resistant tumor cells. METHODS MSNs-SS-NH2@DOX was prepared on the basis of mesoporous silica （MSNs），covered with cationic liposomes （CLs） to synthesize CLMSNs-SS-NH2@DOX，and then obtain CLMSNs-SS-NH2@DOX/siRNA by co-loading with siRNA. The particle size and Zeta potential of the preparation were determined，and its micromorphology was observed； differential scanning calorimetry，X-ray diffraction，infrared spectroscopy and physical adsorption analysis were conducted. The in vitro release of DOX from the preparation was determined under different pH conditions （pH5.0，pH7.4） and different glutathione concentrations （0，2，5， 10 mmol/L）. The effects of this preparation on the uptake，migration，apoptosis，cycle and P-glycoprotein （P-gp） expression of MCF-7/ ADR in DOX-resistant breast cancer cells were investigated. RESULTS CLMSNs-SS-NH2@DOX/siRNA had a clear core-shell structure，obvious lipid membrane layer，particle size of （197.63±3.75） nm，Zeta potential of （20.64±0.98） mV，and with good physical and chemical properties. In vitro release results showed that CLMSNs-SS-NH2@DOX/siRNA possessed good pH/reduction double-response. The results of cell experiment showed that after intervened with CLMSNs-SS-NH2@DOX/siRNA，the fluorescence intensity of MCF-7/ADR cells was significantly enhanced，the migration rate and P-gp expression level were significantly reduced， while total proportion of apoptosis and that of G0/G1 phase were significantly increased （P＜0.05）. CONCLUSIONS In this study， DOX and siRNA co-loaded CLMSNs-SS-NH2@DOX/siRNA is prepared successfully， which has good physical and chemical properties， pH/reduction double-response properties. It can reverse the multidrug resistance of MCF-7/ADR cells by down-regulation of P-gp expression. |
| 期刊： | 2022年第33卷第23期 |
| 作者： | 张梦玮，杨硕晔，杨亚南，王振威，屈凌波 |
| AUTHORS： | ZHANG Mengwei，YANG Shuoye，YANG Yanan，WANG Zhenwei，QU Lingbo |
| 关键字： | 介孔硅；小干扰RNA；阿霉素；抗肿瘤；多药耐药 |
| KEYWORDS： | mesoporous silica； siRNA； doxorubicin； anti- |
| 阅读数： | 162 次 |
| 本月下载数： | 4 次 |
* 注：未经本站明确许可，任何网站不得非法盗链资源下载连接及抄袭本站原创内容资源!在此感谢您的支持与合作！
