文献:
Orally delivered legumain-activated nanovehicles improve tumor accumulation and penetration for combinational photothermalchemotherapy
文献链接:
https://pubmed.ncbi.nlm.nih.gov/32289329/作者:
Jing Wang, Yuqi Wang, Haiqiang Cao, Hong Wang, Jie Li, Youxin Li, Yaping Li, Zhiwen Zhang
相关产品:
DMPE-PEG5000-maleimide(磷脂-聚乙二醇5000-马来酰亚胺)
原文摘要:
Oral chemotherapy offers a more convenient treatment option for cancer patients but the effectiveness is significantly hindered by the limited drug delivery efficiency. Herein, we designed legumain-activable melittin (LM) decorated polymeric nanovehicles loading IR-780 and sorafenib (LPN) to enhance their oral delivery to tumors, with efficient accumulation and penetration capacity, for combinational photothermal-chemotherapy of gastric cancer. The nanosized LPN displayed good stability in simulated gastrointestinal fluids. After oral administration, the oral bioavailability of sorafenib was remarkably improved (75.9-fold by LPN versus free drug suspension). Moreover, the orally administered LPN could preferentially accumulate at the tumor site and penetrate into the interior regions of the tumor mass. Upon combination with laser irradiation, LPN produced notable inhibition of tumor growth, which was more effective than the counterpart unmodified nanovehicles. Therefore, LPN represents an encouraging oral delivery nanoplatform with favorable tumor accumulation and penetration capability for oral combinational cancer therapy.
DMPE - PEG5000 - maleimide 是一种化学试剂,它的名称中包含几个重要的部分。“DMPE” 是1,2 -二肉豆蔻酰-sn-甘油-3-磷酸乙醇胺(1,2-Dimyristoyl- sn-glycero-3- phosphoethanolamine)的缩写,这是一种磷脂成分。“PEG5000” 代表聚乙二醇(Polyethylene glycol),其分子量约为 5000。聚乙二醇是一种具有良好水溶性和生物相容性的聚合物。“maleimide” 是马来酰亚胺,它是一种含有不饱和双键的活性官能团。这种化合物的结构是由 DMPE 部分、PEG5000 链和 maleimide 基团通过化学键连接而成。通常,这种结构设计使得它在生物化学和材料科学等领域有应用。基于DMPE - PEG5000 - maleimide的相关特性,该文献合成LPN流程如下:
图:合成流程示意
DMPE-PEG5000-LM偶联物的合成:
选择适当的溶剂,如二甲基亚砜(DMSO)、二甲基甲酰胺(DMF)等,确保反应物在溶剂中充分溶解并相互接触。控制反应温度,通常在室温下进行,但根据具体反应条件和反应物的性质,可能需要调整温度。将DMPE-PEG5000-maleimide和LM化合物按一定比例加入到溶剂中,并充分搅拌以确保混合均匀。必要时,可以加入催化剂以促进反应的进行。
PN和LPN的制备:
LPN由PCL5000-PEG5000、DMPE-PEG5000-LM、IR-780和索拉非尼制成。,将这些成分溶解在氯仿和甲醇以一定比例混合的圆瓶中,并在减压下蒸发形成薄膜。然后,用纯化水轻轻摇晃分散膜,用探针在冰浴中超声制备LPN。由PCL5000-PEG5000、DMPE-PEG5000、IR-780和索拉非尼组成的对应PN按照相同的程序制备。
图:表征图像
结论:
该文献成功制备出了基于DMPE - PEG5000 - maleimide合成的PN和LPN。数据显示,该物质具有积累和渗透能力,纳米级LPN在模拟中表现出良好的稳定性。LPN对tumour生长有明显作用,比未修饰的纳米载体更有效。因此,LPN是一种良好的递送纳米平台。