Ultrasensitive Portable Aptamer-Electrochemical Sensor for Alzheimer's Biomarker Detection

Strategic Insights -

Research conducted in Taizhou, People's Republic of China, has led to the development of a miniaturized electrochemical platform for the detection of amyloid-b oligomers (AbOs), key biomarkers in early Alzheimer's disease progression. The platform, described in the journal Bioelectrochemistry, utilizes a disposable screen-printed electrode functionalized with gold nanoparticles and thiolated aptamers, achieving a linear detection range of 10 pg/mL to 100 mg/mL and a limit of detection (LOD) of 2.3 pg/mL in human serum.

Key Takeaways:

  • The research presented a miniaturized electrochemical platform for the detection of amyloid-b oligomers, crucial biomarkers in early Alzheimer's disease progression.
  • The platform employed a disposable screen-printed electrode functionalized with gold nanoparticles and thiolated aptamers, utilizing AuS bonds for oriented aptamer immobilization and AbO-specific recognition.
  • The system achieved a linear detection range of 10 pg/mL to 100 mg/mL (R = 0.995) with a limit of detection (LOD) of 2.3 pg/mL (S/N = 3) in human serum, coupled with robust recovery rates (94.9-108.89 %) and low inter-assay variability (RSD).
  • The platform addresses unmet needs in community-based Alzheimer's disease screening and has scalable potential for monitoring neurodegenerative proteomics.
  • The research concluded that the system combines laboratory-grade performance, portability, and scalability, making it a valuable tool for point-of-care testing of Alzheimer's biomarkers.
  • Huawu Mao and co-researchers developed the ultrasensitive portable aptamer-electrochemical sensor, which was published in Bioelectrochemistry.

Statistics:

  • Linear detection range achieved by the platform: 10 pg/mL to 100 mg/mL
  • Limit of detection (LOD) in human serum: 2.3 pg/mL (S/N = 3)
  • Robust recovery rates: 94.9-108.89 %
  • Low inter-assay variability (RSD)

Sources:

  • Ultrasensitive portable aptamer-electrochemical sensor for point-of-care testing of Alzheimer's biomarker amyloid-b oligomers. Bioelectrochemistry, 2025;167:109079.
  • ELSEVIER - www.elsevier.com; Bioelectrochemistry - www.journals.elsevier.com/bioelectrochemistry/
  • NewsRx. Reports Summarize Alzheimer Disease Study Results from Huawu Mao and Co-Researchers (Ultrasensitive portable aptamer-electrochemical sensor for point-of-care testing of Alzheimer's biomarker amyloid-b oligomers). Pain & Central Nervous System Week. September 15, 2025; p 3297.