DSPC、cholesterol、DSPE-mPEG2000制备空白脂质体的应用
瑞禧生物2024-12-18   作者:ws   来源:
字号大小:

文献:

AS1411 aptamer-modified theranostic liposomes co-encapsulating manganese oxide nano-contrast agent and paclitaxel for MRI and therapy of cancer

文献链接:

https://pubs.rsc.org/en/content/articlelanding/2019/ra/c9ra06878c

作者:

Jingjing Li,  Qing Li, Meijuan He, Fan Ding, Lulu Cai, Mingming Zhao,Lina Dong, Qi Wangb and Kai Xu

相关产品:

DSPC(1、2-二硬脂酰甘油3-磷酸胆碱)

cholesterol(胆固醇)

DSPE-mPEG2000(1、2-二硬脂酰甘油3-磷酸乙醇胺-N-[甲氧基(聚乙二醇)-2000)

DSPE-mPEG2000-COOH

原文摘要:

   With the advantages and development of MRI nano-contrast agents (CAs), increasing number of MRI-based theranostic nanoparticles have emerged. Liposome, as a biosafe nanocarrier has been used phase III trial for cancer treatment. In this study, liposome was employed as a nanocarrier to co-encapsulate MRI nanocontrast agent poly(ethylene glycol)-grafted manganese oxide (PEG-MnO) and anticancer drug paclitaxel (PTX) for the fabrication of a novel theranostic nanocomplex. After being further modified with AS1411 aptamer, the obtained nanoprobe AS1411-liposome-PEG-MnO-PTX displayed the potential of simultaneous MRI diagnosis and therapy of renal carcinoma in vitro and in vivo. It was found that compared with PEG-MnO nano-CA, liposome-PEG-MnO and AS1411-liposome-PEG-MnO presented a stronger MR contrast enhancement effect in the tumor and longer retention time in the tumor region. More importantly, the introduction of AS1411 aptamer further enhanced the MRI effect and the tumor

growth inhibition effect, showing its potential use as a theranostic nanoprobe for renal carcinoma.

 

脂质体作为一种纳米载体已被用于cancer heal。使用脂质体作为纳米载体,共封装MRI纳米造影剂聚(乙二醇)接枝的氧化锰(PEG-MnO)和抗cancer物紫杉醇(PTX),用于制造一种新型的heal性纳米复合物。获得的纳米探针AS1411-脂质体-ps1411-PTX peg-m411适配体进一步修饰后有作用。与PEG-MnO纳米ca相比,脂质体-PEG-MnO和as1411-脂质体-peg-MnO在tumour中具有更强的Mr增强作用,在tumour区域的保留时间更长。更重要的是,AS1411适配体的引入进一步增强了MRI效应和tumour生长抑制作用,显示了其作为纳米探针的潜在应用潜力。那么如何制备空白脂质体,在小编引用的文献里就介绍了相关制备:

 

脂质体透射电镜图像 

图:脂质体透射电镜图像

采用脂质水化挤压法制备空白脂质体,用1、2-二硬脂酰甘油3-磷酸胆碱(DSPC)、胆固醇、1、2-二硬脂酰甘油3-磷酸乙醇胺-N-[甲氧基(聚乙二醇)-2000](DSPE-mPEG2000)和DSPE-mPEG2000-COOH溶解在甲醇和氯仿的混合物中。上述溶液用超声电池干扰器超声处理。然后蒸发有机溶剂,用氮气干燥过夜,形成脂质。获得的薄膜在 PBS溶液中通过涡旋水合,并搅拌形成空白脂质体。最后,将空白脂质体通过微孔膜进行切割,得到均匀分布的空白脂质体以供进一步使用。

脂质体的大小分布 

图:脂质体的大小分布

 

结论:

通过使用1、2-二硬脂酰甘油3-磷酸胆碱(DSPC)、胆固醇、1、2-二硬脂酰甘油3-磷酸乙醇胺-N-[甲氧基(聚乙二醇)-2000](DSPE-mPEG2000)和DSPE-mPEG2000-COOH制备得到的空白脂质体在实验中进行下一步反应可应用到纳米探针AS1411-脂质体-peg-MnO-PTX。结果表明脂质体的存在利于MRI纳米ca与抗cancer化合物的共存,而且提高了纳米CA的MRI能力,优于CA的低剂量使用或病变的清晰成像。