Biodegradable polymer - cisplatin(IV) conjugate as a pro-drug of cisplatin(II)
Xiao, Haihua1,2; Qi, Ruogu1,2; Liu, Shi1,2; Hu, Xiuli1; Duan, Taicheng1; Zheng, Yonghui1; Huang, Yubin1; Jing, Xiabin1
Source PublicationBIOMATERIALS
AbstractA Pt(IV) complex was covalently conjugated to a new biodegradable amphiphilic tri-block copolymer, MPEG-b-PCL-b-PLL, which contains pendant amino groups, to form a polymeric pro-drug of cisplatin(II), MPEG-b-PCL-b-PLL/Pt(IV). The conjugate was assembled into nano-micelles. The Pt(IV) complex, the polymer carrier and the conjugate were characterized systematically. In vitro release experiments showed that drug release from the polymer-Pt(IV) micelles follows an acid responsive and oxidation-reduction sensitive kinetics. HPLC-ICP-MS analysis revealed that cisplatin(II) can be released from the conjugate under an acidic plus a reductive condition which is available inside a cancerous cell. In vitro MTT assay demonstrated that the polymer-Pt(IV) micelles display higher cytotoxicity against SKOV-3 tumor cells than both cisplatin(II) and Pt(IV) complex. This enhanced cytotoxicity is attributed to effective internalization of the micelles by the cells via endocytosis mechanism, which was observed by fluorescence imaging and by direct determination of the platinum uptake by the cells. This polymer-Pt(IV) conjugate is a promising polymeric pro-drug of cisplatin in micellar form. It can protect the Pt(IV) complex against blood clearance. It can enter cancerous cells via endocytosis mechanism and then cisplatin(II) can be released. Therefore, this polymeric pro-drug of cisplatin is expected to find clinical applications in the future. (C) 2011 Elsevier Ltd. All rights reserved.
KeywordCisplatin Platinum Anti-tumor Drugs Polymer-drug Conjugate Cancer Therapy Drug Delivery
Indexed BySCI
WOS IDWOS:000294829300046
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Cited Times:137[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Corresponding AuthorJing, Xiabin
Affiliation1.Chinese Acad Sci, Changchun Inst Appl Chem, State Key Lab Polymer Phys & Chem, Changchun 130022, Peoples R China
2.Chinese Acad Sci, Grad Sch, Beijing 100049, Peoples R China
Recommended Citation
GB/T 7714
Xiao, Haihua,Qi, Ruogu,Liu, Shi,et al. Biodegradable polymer - cisplatin(IV) conjugate as a pro-drug of cisplatin(II)[J]. BIOMATERIALS,2011,32(30):7732-7739.
APA Xiao, Haihua.,Qi, Ruogu.,Liu, Shi.,Hu, Xiuli.,Duan, Taicheng.,...&Jing, Xiabin.(2011).Biodegradable polymer - cisplatin(IV) conjugate as a pro-drug of cisplatin(II).BIOMATERIALS,32(30),7732-7739.
MLA Xiao, Haihua,et al."Biodegradable polymer - cisplatin(IV) conjugate as a pro-drug of cisplatin(II)".BIOMATERIALS 32.30(2011):7732-7739.
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