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A polydopamine nanosphere based highly sensitive and selective aptamer cytosensor with enzyme amplification.

Daoqing Fan1, Changtong Wu, Kun Wang

  • 1State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, P. R. China. ekwang@ciac.ac.cn.

Chemical Communications (Cambridge, England)
|November 4, 2015
PubMed
Summary

A novel cytosensor using polydopamine nanospheres was developed for highly sensitive and selective cell detection. This new method can detect as few as 15 cells per milliliter, advancing cell analysis techniques.

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Area of Science:

  • Biomedical Engineering
  • Nanotechnology
  • Analytical Chemistry

Background:

  • Accurate and sensitive detection of specific cell types is crucial for disease diagnosis and monitoring.
  • Existing methods for cell detection often face challenges with sensitivity, selectivity, or complexity.

Purpose of the Study:

  • To develop a novel, highly sensitive, and selective cytosensor for detecting CCRF-CEM cells.
  • To leverage polydopamine nanospheres and specific recognition strategies for improved cell sensing.

Main Methods:

  • Development of a cytosensor utilizing polydopamine nanospheres.
  • Integration of aptamer/membrane protein recognition for target specificity.
  • Application of Exonuclease III assisted cycle amplification for signal enhancement.

Main Results:

  • The developed cytosensor demonstrated high sensitivity and selectivity for CCRF-CEM cells.
  • A limit of detection as low as 15 cells per milliliter was achieved.
  • The combination of recognition strategies and amplification significantly improved sensing performance.

Conclusions:

  • The novel cytosensor based on polydopamine nanospheres offers a promising platform for sensitive and selective cell detection.
  • This approach provides a valuable tool for applications requiring precise cell quantification.
  • The study highlights the potential of nanomaterials and enzymatic amplification in advanced biosensing.