Polymeric micelles for apoptosis-targeted optical imaging of cancer and intraoperative surgical guidance.

Polymeric micelles for apoptosis-targeted optical imaging of cancer and intraoperative surgical guidance.
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DOI:
10.1371/journal.pone.0089968
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发表时间:
2014
期刊:
影响因子:
3.7
通讯作者:
Kwon GS
Kwon GS
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Cho H;Cho CS;Indig GL;Lavasanifar A;Vakili MR;Kwon GS

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在两步策略中,腹膜内(IP)注射聚乙烯嵌段聚乙二醇(ε-己内酯)分别含有30、30和30 mg/kg的紫杉醇(PTX)、环巴胺(Cyclopamine)和棉酚(GSP)的(PEG-b-PCL)胶束使肿瘤组织减小1.3倍,基于生物发光的损失,体重变化<10%,并在卵巢癌的ES-2-luc-bearing异种移植模型中用作新辅助化疗(NACT)时诱导腹膜肿瘤的细胞凋亡。在第二步中,单次静脉内(IV)注射含有近红外(NIR)荧光探针DiR的靶向骨化的GFNFRLKAGAKIRFGS-PEG-b-PCL胶束。(1,1 ′-双十八烷基四甲基吲哚三碳菁碘化物),与通过甲氧基PEG-b-PCL胶束递送的DiR分子相比,在第二步中,在IV注射后48小时(非靶向)进行。因此,PEG-b-PCL胶束的串联使得能够高分辨率检测ca。1 mm直径的肿瘤,导致约90%的肿瘤切除,并且腹膜癌指数(PCI)约为1.5。7.因此,用于NCAT和NIR荧光成像的治疗诱导的细胞凋亡的PEG-b-PCL胶束的串联用于术中手术指导可能是转移性卵巢癌的有希望的治疗策略。
In a two-step strategy, an intraperitoneal (IP) injection of poly(ethylene glycol)-block-poly(ε-caprolactone) (PEG-b-PCL) micelles containing paclitaxel (PTX), cyclopamine (CYP), and gossypol (GSP) at 30, 30, and 30 mg/kg, respectively, debulked tumor tissues by 1.3-fold, based on loss of bioluminescence with <10% body weight change, and induced apoptosis in peritoneal tumors when used as neoadjuvant chemotherapy (NACT) in an ES-2-luc-bearing xenograft model for ovarian cancer. In a second step, a single intravenous (IV) injection of apoptosis-targeting GFNFRLKAGAKIRFGS-PEG-b-PCL micelles containing a near-infrared (NIR) fluorescence probe, DiR (1,1′-dioctadecyltetramethyl indotricarbocyanine iodide), resulted in increased peritoneal DiR accumulation in apoptosis-induced ES-2-luc tumor tissues (ex vivo) by 1.5-fold compared with DiR molecules delivered by methoxy PEG-b-PCL micelles (non-targeted) at 48 h after IV injection in a second step. As a result, a tandem of PEG-b-PCL micelles enabled high-resolution detection of ca. 1 mm diameter tumors, resulting in resection of approximately 90% of tumors, and a low peritoneal cancer index (PCI) of ca. 7. Thus, a tandem of PEG-b-PCL micelles used for NCAT and NIR fluorescence imaging of therapy-induced apoptosis for intraoperative surgical guidance may be a promising treatment strategy for metastatic ovarian cancer.
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