Coupling to a cancer-selective heparan-sulfate-targeted branched peptide can by-pass breast cancer cell resistance to methotrexate.

Coupling to a cancer-selective heparan-sulfate-targeted branched peptide can by-pass breast cancer cell resistance to methotrexate.
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DOI:
10.18632/oncotarget.19056
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发表时间:
2017-09-29
期刊:
影响因子:
--
通讯作者:
Bracci L
Bracci L
中科院分区:
其他
文献类型:
--
作者:
Depau L;Brunetti J;Falciani C;Scali S;Riolo G;Mandarini E;Pini A;Bracci L

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被称为NT4的癌症选择性四分支多肽可以偶联到不同的功能单位,用于癌细胞成像或治疗。NT4多肽可以与脂蛋白受体相关蛋白(LRP)受体和膜蛋白多糖上的硫酸乙酰肝素链特异性结合,并能被表达这些膜靶点的癌细胞有效地内化。由于NT4多肽的结合和内化是由癌细胞膜上特定的NT4受体介导的,这可能使药物膜转运体产生的耐药性被旁路,因此我们测试了携带药物的NT4在癌细胞系中绕过耐药性的能力。我们发现,在缺乏叶酸还原载体表达的MTX耐药的人乳腺癌细胞中,MTX偶联的NT4允许耐药旁路。NT4多肽似乎是一种非常有前途的癌症选择性靶向药物,可以作为治疗药物在个性化的肿瘤学应用中使用。
Cancer-selective tetra-branched peptides, named NT4, can be coupled to different functional units for cancer cell imaging or therapy. NT4 peptides specifically bind to lipoprotein receptor-related proteins (LRP) receptors and to heparan sulfate chains on membrane proteoglycans and can be efficiently internalized by cancer cells expressing these membrane targets. Since binding and internalization of NT4 peptides is mediated by specific NT4 receptors on cancer cell membranes and this may allow drug resistance produced by drug membrane transporters to be by-passed, we tested the ability of drug-armed NT4 to by-pass drug resistance in cancer cell lines. We found that MTX-conjugated NT4 allows drug resistance to be by-passed in MTX-resistant human breast cancer cells lacking expression of folate reduced carrier. NT4 peptides appear to be extremely promising cancer-selective targeting agents that can be exploited as theranostics in personalized oncological applications.
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