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Selective and Regenerable Surface Based on β-Cyclodextrin for Low-Density Lipoprotein Adsorption.

Fei Fang1, Xiao-Jun Huang1, Yi-Zong Guo1

  • 1MOE Key Laboratory of Macromolecular Synthesis and Functionalization, Department of Polymer Science and Engineering , Zhejiang University , Hangzhou 310027 , China.

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Cyclodextrins (CDs) show promise for developing effective low-density lipoprotein (LDL) adsorbents. A β-CD modified surface demonstrated selective LDL adsorption and regeneration, advancing atherosclerosis treatment strategies.

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Area of Science:

  • Biomaterials Science
  • Supramolecular Chemistry
  • Cardiovascular Research

Background:

  • Low-density lipoprotein (LDL) carries cholesterol and is linked to atherosclerosis.
  • Current LDL adsorbents interact with LDL surface biomolecules.
  • Cyclodextrins (CDs) offer a potential basis for economical and effective LDL adsorbents due to their structure.

Purpose of the Study:

  • To investigate the interaction between beta-cyclodextrin (β-CD) and LDL in solution.
  • To develop and characterize a supramolecular surface based on β-CD for LDL adsorption.
  • To explore the roles of hydrogen bonding and the β-CD cavity in LDL interaction.

Main Methods:

  • Dynamic light scattering, circular dichroism, and ultraviolet spectroscopy were used to study β-CD and LDL interactions in solution.
  • A β-CD-modified gold surface was created using a self-assembled monolayer.
  • Surface plasmon resonance (SPR) analysis was employed to investigate the adsorption mechanism and selectivity.

Main Results:

  • The β-CD modified surface demonstrated good selectivity for LDL.
  • The SPR analysis provided insights into the influence of hydrogen bonds and the β-CD cavity on LDL binding.
  • The adsorbent surface could be effectively regenerated using sodium dodecyl sulfate.

Conclusions:

  • β-CD based supramolecular surfaces are effective for selective LDL adsorption.
  • Understanding the interaction mechanisms can guide the development of improved LDL adsorbents.
  • This approach offers potential for creating more efficient and cost-effective LDL removal therapies.