Poly(ethylene glycol) with observable shedding.

Poly(ethylene glycol) with observable shedding.
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DOI:
10.1002/anie.201001868
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发表时间:
2010-09-03
影响因子:
16.6
通讯作者:
Farokhzad, Omid C.
Farokhzad, Omid C.
中科院分区:
化学1区
文献类型:
--
作者:
Gao, Weiwei;Langer, Robert;Farokhzad, Omid C.

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一种带有荧光共振能量转移(FRET)的聚乙二醇(PEG)共轭物从纳米颗粒(NPs)上裂解下来时,会在520纳米处发出荧光。当纳米颗粒靶向癌细胞系时,内涵体区室的还原环境导致二硫键裂解以及PEG层脱落。N - 乙基马来酰亚胺可抑制二硫键裂解从而抑制荧光发射,而二硫键裂解试剂二硫苏糖醇可恢复荧光发射,这表明荧光发射与PEG脱落之间存在直接关联。
A novel FRET-bearing poly(ethylene glycol) (PEG) conjugate fluoresces at 520 nm when it is cleaved off from nanoparticles (NPs). When the NPs were targeted to cancer cell lines, the reducing redox of the endosomal compartment caused disulfide bond cleavage and shedding of the PEG layer. The fluorescence emission can be suppressed by N-ethylmaleimide to inhibit disulfide cleavage and restored by dithiothreitol, a disulfide cleavage reagent, indicating a direct correlation between fluorescence emission and PEG shedding.
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