文献:A self-assembled, ROS-responsive Janus-prodrug for targeted therapy of inflammatory bowel disease
文献链接:https://www.sciencedirect.com/science/article/abs/pii/S0168365919306182
作者:Shanshan Li , Aiqing Xie, Hui Li, Xiang Zou, Qixiong Zhang
相关产品:
PLGA 聚乳酸-羟基乙酸共聚物
DSPE-PEG2k 磷脂-聚乙二醇2K
原文摘要:A self-assembled and oxidation-degradable Janus-prodrug, termed as Bud-ATK-Tem (B-ATK-T), was fabricated by ROS-responsive aromatized thioketal (ATK) linked anti-inflammatory drug budesonide (Bud) and antioxidant tempol (Tem). Benefiting from the hydrophobic interactions and π-π stacking interactions of ATK, prodrug B-ATK-T could self-assemble into nanoparticles (NP) in water containing lecithin and DSPE-PEG2K. The morphology of B-ATK-T NP (approximate 100-120 nm) was confirmed to be regular spherical by transmission electron microscope. B-ATK-T NP was endowed high drug loading content with 41.23% for Bud and 15.55% for Tem. The rapid drug release from B-ATK-T NP proceeded in an extensive reactive oxygen species (ROS)-dependent manner. More than 98% of Bud and Tem in B-ATK-T NP could release in the mimic inflammation microenvironment or phorbol-12-myristate-13-acetate (PMA)-stimulated macrophages within short time. The release of drugs in a simultaneous and proportional manner ensures that B-ATK-T NP can increase the combined efficacy of anti-inflammation and anti-oxidation. It is worth noting that B-ATK-T NP could be passively accumulated and dramatically increasing the maximum drugs concentration in the inflamed colon of mice with inflammatory bowel disease (IBD) by oral route, and avoiding potential systemic side effects. B-ATK-T NP could not only relieve colitis via inhibiting the expression of oxidative and proinflammatory mediators more than combination of free drugs, but also significantly reduce colitiscaused death. Taken together, the self-assembled, Janus-prodrug B-ATK-T NP is a promising candidate therapies for IBD, even for other inflammatory diseases.
DSPE-PEG2K和PLGA是两种在生物医学和制药领域有着应用的材料。DSPE-PEG2K,即二硬脂酰基磷脂酰乙醇胺-聚乙二醇2000,是二硬脂酰基磷脂酰乙醇胺(DSPE)与分子量为2000的聚乙二醇(PEG)的缀合物。DSPE-PEG2K既具有亲水性又具有疏水性,是极好的脂质体形成材料。PLGA是一种可降解的功能高分子有机化合物,具有良好的生物相容性和无Poison 特性。
不同的单体比例可以制备出不同类型的PLGA,如PLGA 75:25表示该聚合物由75%乳酸和25%羟基乙酸组成。该文献经过特定设计B-ATK-T NP 纳米粒子,其具体组成和性质可能因研究目的和应用场景而异。PLGA(聚乳酸 - 羟基乙酸共聚物)纳米粒子可以同时负载 Bud(一种药物)和 Tem(另一种药物)。Bud 和 Tem 可能具有不同的作用机制,共同作用可以增强效果。
图为:利用DSPE-PEG2k制备聚乙二醇化表面
DSPE-PEG2K和PLGA在B-ATK-T NP和Bud/Tem共载PLGA NP制备中的应用:
利用B-ATK-T的两亲性,采用改进的一锅纳米沉淀法制备了前药纳米组件B-ATK-T NP。简单地说,将B-ATK-T原药溶解在乙腈中,然后滴加入含有卵磷脂和DSPE-PEG2K的去离子水中搅拌。B-ATK-T的自组装是自发发生的。用真空蒸馏去除残留的乙腈。为了制备染料标记的B-ATK-T NP,将DiI与B-ATK-T在乙腈中共溶,然后将卵磷脂和DSPE-PEG2K滴加入水中。然后将反应溶液进一步置于透析袋中,用水透析,以去除未组装的B-ATK-T和染料。然后,收集NPs并进行冻干。为了与载体辅助给药系统进行比较,采用经典的纳米共沉淀法制备了Bud/Tem共载PLGA纳米颗粒(BT/PLGA NP)。简单地说,将Tem和PLGA共溶于乙腈中,滴加入含有卵磷脂的去离子水和 DSPEP-EG2K中。这些纳米颗粒是在搅拌条件下形成的。经透析和冻干后,获得BT/PLGA NP。
图为:通过动态光散射测定了B-ATK-T的CAC
结论:DSPE-PEG2K 和 PLGA 在 B-ATK-T NP 和 Bud/Tem 共载 PLGA NP 的制备中发挥着重要的作用。它们可以提高纳米粒子的稳定性、延长循环时间、改善生物相容性,并作为药物载体实现药物的共载和缓释。在制备共载 PLGA NP 时,PLGA 可以作为药物载体,同时负载 Bud(一种药物)和 Tem(另一种药物)。PLGA 可以通过控制其降解速度来实现药物的缓释,延长药物的作用时间。PLGA 可以通过乳化溶剂挥发法等方法制备成纳米粒子。这些纳米粒子可以根据需要进行表面修饰,如连接 DSPE-PEG2K 等,以改善其性能。