聚酰胺-胺(PAMAM)是研究最为广泛的一类非病毒载体,其由一个引发核及径向连接的重复支化单元组成.由于其独特的树状结构,PAMAM在药物运载、基因治疗、重大疾病早期诊断等方面具有广阔的应用前景.但是由于PAMAM端基带正电可能会引起其潜在的生物毒性,从而影响其在生物医药方面的应用.目前关于PAMAM树状聚合物的毒性报道比较少且分散.分别从体外和体内总结归纳了PAMAM树状大分子毒性问题的研究进展,并尝试对毒性机理以及表面修饰降低毒性进行了探讨.
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