4.6 Article

SERS based Y-shaped aptasensor for early diagnosis of acute kidney injury

Journal

RSC ADVANCES
Volume 12, Issue 25, Pages 15910-15917

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra02813a

Keywords

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Funding

  1. Hainan Province Science and Technology Special Fund [ZDYF2021SHFZ245, ZDYF2021SHFZ219, ZDYF2020133]
  2. National Natural Science Foundation of China [22064009, 22164009]
  3. Hainan Provincial Natural Science Foundation of China [820RC641, 820RC655, 322QN309]
  4. Talent Program of Hainan Medical University [HYPY2020017]
  5. Natural Science Research Talent Project of Hainan Medical University [JBGS202101]
  6. Hainan Province Clinical Medical Center

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In this paper, a surface-enhanced Raman scattering-based aptasensor is developed for duplex detection of protein biomarkers in acute kidney injury (AKI). The sensor utilizes the base-pairing specificity of nucleic acids to form a self-assembled structure and increases the Raman scattering signal through the release of gold nanoparticles, achieving high sensitivity analysis. Experimental results confirm the general applicability of this sensor in early diagnosis of AKI.
Considering the pivotal role of biomarkers in plasma, the development of biomarker specific sensing platforms is of great significance to achieve accurate diagnosis and monitor the occurrence and progress in acute kidney injury (AKI). In this paper, we develop a promising surface-enhanced Raman scattering-based aptasensor for duplex detection of two protein biomarkers in AKI. Exploiting the base-pairing specificity of nucleic acids to form a Y-shaped self-assembled aptasensor, the MGITC labelled gold nanoparticles will be attached to the surface of magnetic beads. In the presence of specific AKI-related biomarkers, the gold nanoparticles will detach from magnetic beads into the supernatant, thus leading to a SERS signal increase, which can be used for the highly sensitive analysis of target biomarkers. In addition, the limit of detection calculated for each biomarker indicates that the SERS-based aptasensor can well meet the detection requirements in clinical applications. Finally, the generality of this sensor in the early diagnosis of AKI is confirmed by using a rat model and spiked plasma samples. This sensing platform provides a facile and general route for sensitive SERS detection of AKI-related biomarkers, which offers great promising utility for in vitro and accurate practical bioassay in AKI early diagnosis.

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