Breakthrough in Cancer Biomarker Detection: Researchers Develop Sensitive and Convenient Platform

Strategic Insights -

Researchers at Central South University have developed a dual signal amplification platform that utilizes size-adjustable silver nanoparticles and magnetic capture probes to selectively capture and quantitatively detect circulating tumor cells (CTCs) in breast cancer patients. This innovative approach enables direct detection of cancer cells in real human blood samples at remarkably low levels, with a detection limit of 2 cells/mL and a dynamic range of 10 to 5 x 10 cells/mL (R = 0.990). The recovery rates in whole blood ranged from 92 % to 105 %, with relative standard deviations (RSDs) of the recoveries ranging from 3.5 to 8.7 %. This research provides innovative approaches for clinical cancer biomarker applications and expands methods for cancer monitoring.

Key Takeaways:

  • The dual signal amplification platform utilizes size-adjustable silver nanoparticles and magnetic capture probes to selectively capture and quantitatively detect CTCs.
  • The platform achieves a detection limit of 2 cells/mL and a dynamic range of 10 to 5 x 10 cells/mL (R = 0.990).
  • The recovery rates in whole blood ranged from 92 % to 105 %, with relative standard deviations (RSDs) of the recoveries ranging from 3.5 to 8.7 %.
  • The platform enables direct detection of cancer cells in real human blood samples at remarkably low levels.
  • The researchers investigated the impact of Ag NPs size on sensitivity and successfully constructed a colorimetric sensing platform with optimal sensitivity using size-adjustable Ag NPs.
  • The research was conducted by Yao Yao and colleagues at Central South University, with additional authors Yuan Deng, Wei Liu, Qi Liu, Zhiliang Wu, and Xiaoqing Chen.

Statistics:

  • Detection limit: 2 cells/mL
  • Dynamic range: 10 to 5 x 10 cells/mL (R = 0.990)
  • Recovery rates in whole blood: 92 % to 105 %
  • Relative standard deviations (RSDs) of the recoveries: 3.5 to 8.7 %

Sources:

  • Talanta, 2025;294:128231. (Talanta can be contacted at: Elsevier, Radarweg 29, 1043 Nx Amsterdam, Netherlands.)
  • Yao Yao, et al. Talanta, 2025;294:128231. (College of Chemistry and Chemical Engineering, Central South University, Changsha, 410083, People's Republic of China.)
  • Elsevier, Radarweg 29, 1043 Nx Amsterdam, Netherlands. (Elsevier - www.elsevier.com; Talanta - www.journals.elsevier.com/talanta/)