Localized delivery system for cancer drugs, phenstatin, using N-isopropylacrylamide
申请人:——
公开号:US20040052761A1
公开(公告)日:2004-03-18
An injectable drug delivery system for localized release of Phenstatin to a tumor site over a period of time is provided. The drug delivery system comprises the thermoresponsive polymer N-isopropylacrylamide (NIPAAM) and Phenstatin, a toxic antineoplastic agent. The drug delivery system has a critical solution temperature (LCST) that causes it to change from the liquid state at room temperature when injected to a gel or semi-solid state after reaching the temperature of the human body in situ.
Methods are given for delivering Phenstatin to a cancerous tumor. In these methods, the drug delivery system is injected into a tissue or into a tumor where it forms a gel. Phenstatin is slowly released from the polymer and exerts its cytotoxic, tublin-related effects on the tumor. Tumors that may be treated by the present methods include, but are not limited to breast, prostate, lung and bowel cancerous tumors.
本研究提供了一种可注射的给药系统,用于在一段时间内向肿瘤部位局部释放苯司他丁。该给药系统由热致伸缩性聚合物 N-isopropylacrylamide (NIPAAM) 和 Phenstatin(一种有毒的抗肿瘤药物)组成。该给药系统有一个临界溶液温度(LCST),使其在注射时从室温下的液态变为凝胶或半固态,当达到人体原位温度时则变为凝胶或半固态。
本文给出了将苯司他丁递送至癌症肿瘤的方法。在这些方法中,将给药系统注入组织或肿瘤中,使其形成凝胶。苯司他丁缓慢地从聚合物中释放出来,并对肿瘤产生细胞毒性和与微管蛋白相关的作用。本方法可治疗的肿瘤包括但不限于乳腺癌、前列腺癌、肺癌和肠癌。