Abstract：
:Copolymers of N-(2-hydroxypropyl)methacrylamide (HPMA) are prototypic and well-characterized polymeric drug carriers that have been broadly implemented in the delivery of anticancer therapeutics. To demonstrate that polymers, as liposomes, can be used for simultaneously delivering multiple chemotherapeutic agents to tumors in vivo, we have synthesized and evaluated an HPMA-based polymer-drug conjugate carrying 6.4wt% of gemcitabine, 5.7wt% of doxorubicin and 1.0mol% of tyrosinamide (to allow for radiolabeling). The resulting construct, i.e. poly(HPMA-co-MA-GFLG-gemcitabine-co-MA-GFLG-doxorubicin-co-MA-TyrNH(2)), was termed P-Gem-Dox, and was shown to effectively kill cancer cells in vitro, to circulate for prolonged period of time, to localize to tumors relatively selectively, and to inhibit tumor growth. As compared to control regimens, P-Gem-Dox increased the efficacy of the combination of gemcitabine and doxorubicin without increasing its toxicity, and it more strongly inhibited angiogenesis and induced apoptosis. These findings demonstrate that passively tumor-targeted polymeric drug carriers can be used for delivering two different chemotherapeutic agents to tumors simultaneously, and they thereby set the stage for more elaborate analyses on the potential of polymer-based multi-drug targeting.
journal_name
Biomaterialsjournal_title
Biomaterialsauthors
Lammers T,Subr V,Ulbrich K,Peschke P,Huber PE,Hennink WE,Storm Gdoi
10.1016/j.biomaterials.2009.02.040subject
Has Abstractpub_date
2009-07-01 00:00:00pages
3466-75issue
20eissn
0142-9612issn
1878-5905pii
S0142-9612(09)00232-4journal_volume
30pub_type
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