Glucose-isomerism Effect on Sugar-lectin Interaction of Glycopolymer

Xiao-mei Lu; Jian-mei Jiao; Wei Huang

doi:10.11777/j.issn1000-3304.2017.17078

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Glucose-isomerism Effect on Sugar-lectin Interaction of Glycopolymer

Research Article | 更新时间：2021-01-26

- Glucose-isomerism Effect on Sugar-lectin Interaction of Glycopolymer
- Acta Polymerica Sinica Issue 12, Pages: 1955-1965(2017)
- 作者机构：
  
  南京工业大学江苏省柔性电子重点实验室先进材料研究院江苏先进生物与化学制造协同创新中心南京 211816
- 作者简介：
- 基金信息：
- DOI：10.11777/j.issn1000-3304.2017.17078
  CLC：
- Published：20 December 2017，
  
  Received：6 April 2017，
  
  Revised：8 May 2017，
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Xiao-mei Lu, Jian-mei Jiao, Wei Huang. Glucose-isomerism Effect on Sugar-lectin Interaction of Glycopolymer. [J]. Acta Polymerica Sinica (12):1955-1965(2017)
DOI：

Xiao-mei Lu, Jian-mei Jiao, Wei Huang. Glucose-isomerism Effect on Sugar-lectin Interaction of Glycopolymer. [J]. Acta Polymerica Sinica (12):1955-1965(2017) DOI： 10.11777/j.issn1000-3304.2017.17078.

摘要

设计合成了具备良好的近红外吸收性能的苝酰亚胺大分子引发剂，并通过原子转移自由基聚合（ATRP）和后修饰方法制备了重复单元分别为一位羟基葡萄糖（1-Glc）和六位羟基葡萄糖（6-Glc）的糖聚合物.该聚合物在水溶液中能形成苝酰亚胺为核，糖聚合物为壳的纳米聚集体.通过动态光散射（DLS）、透射电子显微镜（TEM）和紫外-可见吸收光谱（UV-Vis）对聚合物在水溶液中的形貌、大小以及光学性能进行了分析表征，聚合物在650~750 nm有较好的近红外吸收特性；通过光声仪测试了聚合物的光声性能，结果表明苝酰亚胺糖聚合物具有较强的光声信号；为研究葡萄糖异构化对糖聚合物蛋白识别功能的影响，采用多种表征手段如浊度法、动态光散射研究了聚合物和凝集素半刀豆蛋白（concanavalin A，Con A）的结合.发现随着Con A凝集素的加入，PBI-1-Glc溶液的浊度和粒径有着明显的增加，而PBI-6-Glc则几乎没有变化；此外，还利用光声成像技术研究了糖聚合物与Con A之间的相互作用，Con A凝集素可使PBI-1-Glc聚合物的光声信号明显增加，此结果表明光声技术也可以有效地识别2种聚合物与凝集素之间的相互作用.实验结果显示，PBI-1-Glc聚合物与凝集素Con A有强的相互作用，而PBI-6-Glc聚合物则没有，这证实了单糖异构化在影响其与凝集素的特异性识别方面具有一定普适性.

Abstract

Based on the biological properties of saccharides

saccharide-protein interaction

self-assembling ability and high quantum yield of perylene bisimide derivatives

glucose functionalized water-soluble perylene bisimide derivatives were designed. Tri-block glycopolymers with different sugar units

1-linked glucose (1-Glc) and 6-linked glucose (6-Glc)

were synthesized by atom transfer radical polymerization (ATRP) and click reaction

using perylene bisimide (PBI) as the initiator. Dynamic light scattering (DLS)

transmission electron microscopy (TEM) and ultraviolet-visible absorption spectra (UV-Vis) were used to characterize the morphology

size and optical property of the glycopolymers in aqueous solution. The results show that the polymers had high absorption in the near IR region. In addition

the photoacoustic property of the polymers was studied by photoacoustic imaging. The results showed that the glycopolymers had strong photoacoustic signals. Moreover

a variety of characterizations including UV-Vis and DLS were conducted to observe the interaction between the two glycopolymers and Con A in order to study glyco-regioisomerism effect on lectin-binding. It was found that the turbidity and particle size of PBI-1-Glc solution increased significantly with the addition of Con A lectin

while PBI-6-Glc solution showed little change. Further more

photoacoustic imaging was also applied to study the recognition of glycopolymers and lectin. The results indicated that Con A could increase the photoacoustic signal of PBI-1-Glc solution

and photoacoustic technology could also be used to identify the interaction between two polymers and lectins effectively. In conclusion

the experimental results showed that PBI-1-Glc had a strong interaction with lectin Con A

whereas PBI-6-Glc did not

confirming that the monosaccharide isomerization effect on their biological function of glycopolymers had universality in a certain degree.

关键词

糖聚合物苝酰亚胺光声成像蛋白质

Keywords

GlycopolymerPerylene bisimidePhotoacoustic imagingProtein

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