Dual-pH responsive micelle platform for co-delivery of axitinib and doxorubicin

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• 作者：Xiuli Xu ; Lian Li ; Zhou Zhou ; Wei Sun ; Yuan Huang ; ^{huangyuan0@163.com" class="auth_mail" title="E-mail the corresponding author}
• 关键词：pH-responsive ; Combination therapy ; Synergistic effect ; Antiangiogenesis ; HPMA micelle
• 刊名：International Journal of Pharmaceutics
• 出版年：2016
• 出版时间：30 June 2016
• 年：2016
• 卷：507
• 期：1-2
• 页码：50-60
• 全文大小：3183 K

文摘

While the complicated pathogenesis of cancer results in limited therapeutic efficacy of current mono-drug treatment, combination therapy by multiple drugs is becoming increasingly attractive due to the decreased side effects and synergistic anti-cancer activities. The recently emerging modality is the co-delivery of traditional chemotherapeutics and anti-angiogenesis agents. Although nanocarriers are frequently utilized for the co-delivery of different drugs, there are still concerns regarding their implementations. Most of the nanocarriers cannot release drugs separately into their different targeted sites of action. Therefore, we have developed a micellar platform for the co-delivery of an antiangiogenesis agent, axitinib (AXI) and a DNA intercalator, doxorubicin (DOX). Our results showed that this cross-linked micelle (DA-CM) could release AXI and DOX in tumor extracellular environment and intracellular lysosome compartments, respectively, in response to the dual pH stimulus. Notably, DA-CM exhibited remarkably improved tumor accumulation, cell internalization, tumor spheroids penetration and cytotoxicity. Ultimately, DA-CM reduced the number of immature vessels within xenograft tumors, demonstrating an effective antiangiogenesis effect. Meanwhile, they inhibited tumor growth by 88%. Our co-delivery micellar system with the dual-pH responsive feature might hold great promises for the combinatory cancer therapy.