Synthesis of a pyridyl disulfide end-functionalized glycopolymer for conjugation to biomolecules and patterning on gold surfaces.
Synthesis of a pyridyl disulfide end-functionalized glycopolymer for conjugation to biomolecules and patterning on gold surfaces.
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DOI:
10.1021/bm900395h
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发表时间:
2009-08-10
影响因子:
6.2
通讯作者:
Maynard, Heather D.
中科院分区:
文献类型:
--
作者:
Vazquez-Dorbatt, Vimary;Tolstyka, Zachary P.;Chang, Chien-Wen;Maynard, Heather D.
A pyridyl disulfide end-functionalized polymer with N-acetyl-d-glucosamine pendant side-chains was synthesized by atom transfer radical polymerization (ATRP). The glycopolymer was prepared from a pyridyl disulfide initiator catalyzed by a Cu (I)/Cu (II)/2,2’-bipyridine system in a mixture of methanol and water. The final polymer had a number-average molecular weight (Mn) of 13.0 kDa determined by 1H NMR spectroscopy and a narrow polydispersity index (1.12) determined by gel permeation chromatography (GPC). The pyridyl disulfide end-group was then utilized to conjugate the glycopolymer to a double-stranded short interfering RNA (siRNA). Characterization of the glycopolymer-siRNA by polyacrylamide gel electrophoresis (PAGE) showed 97% conjugation. The activated disulfide polymer was also patterned on gold via microcontact printing. The pyridyl disulfide allowed for ready immobilization of the glycopolymer into 200 µm sized features on the surface.
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