DSPE-PEG-Mal,DSPE-PEG,coumarin-6 在脂质微球cRGD-FA-SLN的应用
瑞禧生物2025-08-07   作者:ws   来源:
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文献:Long-Circulating Lipid Nanospheres Loaded with Flurbiprofen Axetil for Targeted Rheumatoid Arthritis Treatment

文献链接:https://www.tandfonline.com/doi/full/10.2147/IJN.S419502#graphical-abstract

作者:Zhenyu Chen , Zhongbing Liu , Shuzao Wang , Cai Cheng , Xiaoduan Sun , Zerong Liu , Jun Wei , Jun Jiang , Huaqi Lan , Meiling Zhou , Pei Jing , Yan Lin , Xiangyu Zhou , Zhirong Zhong

相关产品:DSPE-PEG2000-Mal(磷脂-聚乙二醇2000-马来酰亚胺)

DSPE-PEG2000(磷脂-聚乙二醇2000)

coumarin-6(香豆素-6)

原文摘要:

Background: Flurbiprofen axetil (FA) is a non-steroidal anti-inflammatory drug with good analgesic and anti-inflammatory effects. However, it suffers from poor solubility, short circulation time, and off-target binding profile, which significantly limit its clinical application. Here, we loaded FA into stealth lipid microspheres modified with the arginine-glycine-aspartic acid (RGD) peptide (cRGD-FA-SLM), and examined the therapeutic potential of the resulting platform for the treatment of rheumatoid arthritis (RA).

Methods: cRGD-FA-SLM was prepared by high pressure homogenization, and its toxicity and uptake by macrophages were examined using cultures of RAW264.7 cells. Hemolysis and hepatotoxicity tests were performed to assess the safety of the developed platform, while its pharmacokinetics, biodistribution, and therapeutic efficacy were investigated in a collagen-induced arthritis rat model.

Results: cRGD-FA-SLM showed homogeneous spherical morphology and efficient encapsulation of FA. The developed platform was non-toxic to normal macrophages and was selectively internalized by lipopolysaccharide-activated macrophages in vitro, while it distributed mainly to arthritic joints and significantly prolonged FA in circulation in vivo. cRGD-FA-SLM also significantly reduced the expression of prostaglandin E2 and alleviated joint edema and bone erosion, showing prolonged analgesic effects in arthritic rats.

Conclusion: cRGD-FA-SLM shows good inflammation-targeting ability and prolongs drug circulation in vivo, suggesting promise as an anti-inflammatory and analgesic agent for targeted RA treatment.   

 

DSPE-PEG2000-Mal:一种功能性的磷脂-聚乙二醇-马来酰亚胺化合物。其中 DSPE 代表 1,2 -二硬脂酰- sn -甘油- 3 -磷酸乙醇胺(1,2 - Distearoyl - sn - glycero - 3 - phosphoethanolamine),它是一种磷脂成分。PEG2000 表示聚乙二醇(Polyethylene glycol)的分子量约为 2000,聚乙二醇链具有良好的水溶性和生物相容性。Mal 代表马来酰亚胺(Maleimide),它是一种具有活性反应基团的结构部分。从化学结构上看,DSPE 构成了分子的亲脂性部分,能够与脂质体等脂溶性结构相互作用。PEG2000 链连接在 DSPE 和 Mal 之间,起到增加水溶性、减少非特异性吸附以及延长循环时间等作用。马来酰亚胺基团是一种活性官能团,能够与含有巯基(- SH)的化合物发生特异性的化学反应。

DSPE-PEG2000:主要由两部分组成,即 1,2 - 二硬脂酰 - sn - 甘油 - 3 - 磷酸乙醇胺(DSPE)和分子量为 2000 的聚乙二醇(PEG)。DSPE 是一种磷脂,具有亲脂性,它的化学结构中包含两个硬脂酰脂肪酸链,连接在甘油骨架的 1 位和 2 位上,3 位则连接着磷酸乙醇胺基团。PEG 是一种线性的聚合物,在 DSPE - PEG2000 中,n 的值使得分子量约为 2000。PEG 部分通过共价键与 DSPE 相连,这种结构使得化合物兼具亲脂性和亲水性。

coumarin-6:香豆素-6,化学名称7 -氨基- 4 -甲基香豆素(7 - Amino - 4 - methylcoumarin),它是香豆素类化合物的一种。其化学结构包含一个苯并吡喃- 2 -酮(benzopyran - 2 - one)的基本骨架,在香豆素环的7 位有一个氨基(- NH₂),4 位有一个甲基(- CH₃)。从物理性质来看,coumarin - 6 通常是黄色结晶粉末。它在有机溶剂中有较好的溶解性,具有良好的荧光性能,在一定波长的光激发下能够发出明亮的荧光,荧光颜色通常为蓝色。这种荧光特性使得它在荧光标记和成像等领域有用。基于DSPE - PEG2000 - Mal 、DSPE - PEG2000 、coumarin-6的相关性能,脂质微球cRGD-FA-SLN的合成介绍如下:

 

合成示意 

图:合成示意

 

FA-SLN的制备:

将FA、poloxomer -188和DSPE-PEG2000溶解在油相中,搅拌。制备水相时,将甘油、卵磷脂、磷酸氢二钠和油酸溶于水,搅拌。将油相缓慢加入水相,混合制得初乳。然后将混合物冷却至室温,通过高压均质得到最终乳液。调节乳状液的pH后形成FA-SLN。

DSPE-PEG2000-cRGD的合成

将cRGD和DSPE-PEG2000-Mal以一定的摩尔比在甲醇中混合。然后用透析袋透析进行纯化,真空干燥,并通过1H NMR和傅里叶变换红外(FTIR)光谱进行分析。

cRGD-FA-SLN的合成:

采用Zetasizer Nano ZS90 进行动态光散射(DLS)分析,测定样品的粒径、多分散性指数(PDI)和zeta电位。测定DLS的样品用磷酸盐缓冲盐水(PBS) 稀释。透射电子显微镜(TEM)观察ln、SLN、FA-SLN和cRGD-FA-SLN的形态为测定水相(Mwater)中FA的含量,取样品加入超滤离心管,离心,取下滤液加入无水乙醇中。制备另一样品,超声破乳后,在反相C8色谱柱上采用高效液相色谱法(HPLC)定量FA总量(Mtotal),流动相为乙酸/乙腈。对色谱条件进行特异性、线性度、精密度和空白回收率的验证。

表征图像 

图:表征图像

 

结论:

该文献成功制备出基于DSPE - PEG2000 - Mal 、DSPE - PEG2000 、coumarin-6合成的脂质微球cRGD-FA-SLN。数据显示cRGD-FA-SLM 具有均匀的球形形态和对FA 的有效封装。 实验表明cRGD-FA-SLM具有良好的Inflammation靶向能力,可延长体内化合物循环,有望作为类风湿性关节炎靶向Treatment 的抗炎镇痛剂。