Abstract：
PURPOSE:SN-38, a potent chemotherapeutic drug, has not been used clinically because of its severe side effects and poor solubility. In this work, we aimed to evaluate the effect of dose and multiple injections of SN-38-loaded polymeric depots on antitumor efficacy and toxicity in vivo. METHODS:Preparation and characterization of SN-38-loaded depots were performed and evaluated in vitro using human glioblastoma cell line, U-87MG. Antitumor efficacy with different depot administrations including dose, position of depot injection and number of injections were evaluated in tumor model in nude mice. RESULTS:Depots encapsulated SN-38 with high encapsulation efficiency (~98.3%). High amount of SN-38 (3.0 ± 0.1 mg) was prolonged and controlled release over time and showed anticancer activity against U-87MG cell line in vitro. For one course administration, depots exhibited better antitumor efficacy and reduced toxicity compared to free SN-38. Elevated doses and multiple injections of SN-38-loaded depots and free SN-38 provided greater tumor growth inhibition and animal survival. All animals received SN-38-loaded depots were well tolerated and survived while most of those received free SN-38 died at day 30. Free SN-38 showed severe toxic effect compared to minimal toxicity from SN-38-loaded depots which was due to lower SN-38 level in systemic circulation. Fluorescence imaging and histopathology confirmed that SN-38 released from depots was detected throughout tumors 35 days post administration. CONCLUSIONS:SN-38-loaded depots were proved as a promising new treatment for highly invasive glioblastoma multiforme with low acute toxicity due to controlled release of SN-38.
journal_name
Pharm Resjournal_title
Pharmaceutical researchauthors
Manaspon C,Nasongkla N,Chaimongkolnukul K,Nittayacharn P,Vejjasilpa K,Kengkoom K,Boongird A,Hongeng Sdoi
10.1007/s11095-016-2011-4subject
Has Abstractpub_date
2016-12-01 00:00:00pages
2891-2903issue
12eissn
0724-8741issn
1573-904Xpii
10.1007/s11095-016-2011-4journal_volume
33pub_type
杂志文章abstract：PURPOSE:Tumor vascular normalization by antiangiogenic agents may increase tumor perfusion but reestablish vascular barrier properties in CNS tumors. Vascular priming via nanoparticulate carriers represents a mechanistically distinct alternative. This study investigated mechanisms by which sterically-stabilized liposom...
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