ROS响应化学键-TK酮缩硫醇TK-COOH 结构式如下:
针对一些病变部位高表达ROS的特点,采用含ROS敏感连接键的两亲性嫁接物对纳米粒进行包裹,并将药物负载于疏水层内,构建ROS响应性载药纳米粒。这种载药纳米粒在血液循环中保持相对稳定,并在病变组织高水平ROS的刺激下断裂以释放药物,从而实现药物靶向递送和可控释放,降低药物对非病变器官和组织的毒副作用。
According to the characteristics of high expression of ROS in some lesions, amphiphilic conjugates containing ROS sensitive linkages were used to encapsulate the nanoparticles, and the drugs were loaded into the hydrophobic layer to construct ROS responsive drug loaded nanoparticles. This drug loaded nanoparticles remain relatively stable in the blood circulation and break under the stimulation of high-level ROS in the diseased tissues to release drugs, thereby achieving targeted drug delivery and controlled release and reducing the toxic and side effects of drugs on non diseased organs and tissues.
ROS响应性嫁接物以ROS响应基团作为连接部分,常见的ROS响应基团一般含有硫、硼和碲3种元素,如聚硫化丙烯、硼酸酯等,其中酮缩硫醇(Thioketal, TK)是最常见的ROS响应基团之一,常被用来设计响应性载体。
22907-30-8 TK-NH2 2,2'-(丙烷-2,2-二基双(磺胺二基))二乙胺(sulfanediyl))
4265-59-2 TK-COOH 3'-(丙烷-2,2-二基双(硫烷二基))二丙酸
4265-58-1 TK-COOH 2,2’-[丙烷-2,2-二基双(硫)基]二乙酸
1965253-60-4 HO-TK-OH 酮缩硫醇OH(ROS响应性共聚物材料)
Boc-TK-NH2 叔丁氧羰基-酮缩硫醇-氨基
Fmoc-TK-NH2 芴甲氧羰酰基-酮缩硫醇-氨基
Biotin-TK-NH2 生物素-酮缩硫醇-氨基
FA-TK-NH2 叶酸-酮缩硫醇-氨基
FITC-TK-NH2 荧光素-酮缩硫醇-氨基
参考文献:
1.ROS响应性氧化铈载药纳米粒的急性肾损伤治疗研究 --浙江大学 余慧
2.pH 和 ROS 双响应性靶向纳米药物的构建及其 防治血管再狭窄的应用研究 --陆军军医大学 张润军