The development of activatable lytic peptides for targeting triple negative breast cancer.

The development of activatable lytic peptides for targeting triple negative breast cancer.
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用于靶向三阴性乳腺癌的可激活裂解肽的开发

DOI:
10.1038/cddiscovery.2017.37
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发表时间:
2017
影响因子:
7
通讯作者:
Li Z
Li Z
中科院分区:
医学2区
文献类型:
--
作者:
Zhao H;Qin X;Yang D;Jiang Y;Zheng W;Wang D;Tian Y;Liu Q;Xu N;Li Z

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溶细胞肽是一类新兴的有前途的癌症治疗剂,显示出克服耐药性。它们通过破坏细胞膜的磷脂双层来消除癌细胞,这是一种区别于传统治疗的机制。然而,裂解肽通过系统给药的应用受到非特异性毒性的阻碍。在这里,我们描述了可活化的、掩蔽的裂解肽,其通过对基质金属蛋白酶敏感的可裂解接头与阴离子肽缀合(Ac-w-βA-e 8-XPLG* LAG-klUklUklUklUklUkl-NH 2;序列中的小写字母表示D-氨基酸,U= Aib,α-氨基异丁酸,* 裂解位点)。所述肽在被引入过表达分泌的基质金属蛋白酶的三阴性乳腺癌细胞系MDA-MB-231中后被激活,以选择性地切割肽接头。我们的研究结果表明,可激活的设计可以应用于提高裂解肽的靶向能力。
Cytolytic peptides are an emerging class of promising cancer therapeutics shown to overcome drug resistance. They eliminate cancer cells via disruption of the phospholipid bilayer of cell membranes, a mechanism that differentiates it from traditional treatments. However, applications of lytic peptides via systematic administration are hampered by nonspecific toxicity. Here, we describe activatable, masked lytic peptides that are conjugated with anionic peptides via a cleavable linker sensitive to matrix metalloproteinases (Ac-w-βA-e 8-XPLG* LAG-klUklUkklUklUk-NH 2; lower case letters in the sequences represent D-amino-acids, U= Aib, α-aminoisobutyric acid,* cleavage site). The peptides were activated upon being introduced into the triple negative breast cancer cell line MDA-MB-231, which overexpresses secreted matrix metalloproteinases, to selectively cleave the peptide linker. Our results indicate that the activatable design could be applied to improve the targeting ability of lytic peptides.
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