研究方向背景:
癌症已经成为威胁人类健康的最大因素之一,对癌症的有效诊断和治疗问题是全世界关注的焦点。化疗是目前最常见的癌症治疗手段之一,但是临床应用中化疗在依然存在很多缺点,如药物对肿瘤病灶区的特异性不够导致疗效偏低,并且由于缺乏必要的靶向手段,正常细胞和组织也会受到药物的作用产生毒副反应。同时,常规化疗药物在治疗过程中存在选择性较差、容易产生抗药性、重复给药、生物利用度较低等不足,直接影响到了化学治疗的效果。
近年来在针对肿瘤药物治疗的研究中,利用刺激响应性药物载体实现药物的智能控释是当前该领域研究的热点。一些刺激响应型聚合物纳米载体具备定位精准、智能释放、无毒副作用和可生物降解等条件,结合抗癌药物后是理想的靶向药物传输体系。但是对于药物和载体来说,完全区分肿瘤细胞和正常细胞依然非常困难。由于肿瘤成因复杂,肿瘤标志物很难筛选。目前,人们还不能制备出能全面逃避免疫系统清除、 肝肾系统代谢的载体。而肝脏毒性、肾脏毒性、免疫抑制是许多化疗药物剂量限制的主要因素。
因此,传统的靶向治疗手段需要在现有技术上开拓新的思路。
课题组研究内容:
本课题组针对目前药物载体靶向效果有待提高;载体在人体内的稳定性差,对各脏器和正常细胞构成系统毒性;示踪与治疗难以同时进行等问题,进行了创新性的探索。
重点研究方向包括:
磁性温敏药物载体:通过新型药物载体来实现热化疗协同增效,进一步提高肿瘤病灶区的药物浓度,减低药物副作用。以温敏性聚合物和磁热单元有效结合,同时实现通过外加磁场药物的可控释放和肿瘤区域的热化疗协同增效,实现新的药物传递载体。
主动靶向载药物载体: 将新型靶向分子(单抗等)直接或通过连接臂偶合到载药纳米粒表面,实现特异性受体与药物载体结合,制备具有新型靶标的主动靶向载药胶束。
课题组研究成果:
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4. Liu Y, Li J, Ren J, et al. Preparation and optimization of biodegradable star-block copolymer micelles for temperature-triggered drug release.Materials Letters, Volume 131, 15 September 2014, Pages 5-8. (IF=2.437,引用7次)
https://www.scopus.com/scopus/inward/record.url?partnerID=10&rel=3.0.0&view=basic&eid=2-s2.0-84927135005&md5=dee61101b99e05de83c16ac7d455b42a
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https://www.scopus.com/scopus/inward/record.url?partnerID=10&rel=3.0.0&view=basic&eid=2-s2.0-84919951050&md5=145424103a92eb71bb47b2d3a3370eb1
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https://www.scopus.com/record/display.uri?eid=2-s2.0-84927135005&origin=resultslist&sort=plf-f&src=s&sid=31068f30ec3ee7ae95cd49380db5e16a&sot=autdocs&sdt=autdocs&sl=18&s=AU-ID%2855720763200%29&relpos=14&citeCnt=10&searchTerm=
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https://www.scopus.com/scopus/inward/record.url?partnerID=10&rel=3.0.0&view=basic&eid=2-s2.0-84927135005&md5=dee61101b99e05de83c16ac7d455b42a