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Related Concept Videos

Microbial Biosensors01:17

Microbial Biosensors

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Microbial biosensors are analytical devices that utilize living microbes to detect specific substances through measurable signals. These devices consist of two main components: biosensing organisms and signal-transducing elements. Biosensing organisms, such as Escherichia coli or Saccharomyces cerevisiae, are typically housed in multiwell plates connected to transducers, enabling rapid, real-time detection of target analytes.Signal Generation MechanismWhen a target analyte—such as...
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Pilot Application of Magnetic Nanoparticle-Based Biosensor for Necrotizing Enterocolitis.

Dokyoon Kim1, Changlin Fu2, Xuefeng B Ling2

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A novel magnetic nanoparticle biosensor accurately diagnosed Necrotizing Enterocolitis (NEC) in newborns. This ultrasensitive diagnostic tool differentiates NEC from sepsis, offering improved clinical outcomes for critically ill infants.

Keywords:
BiosensorDiagnosisNECNanoparticleNecrotizing enterocolitisSepsis

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Area of Science:

  • Biomarker discovery and assay development
  • Neonatal medicine and critical care
  • Nanotechnology and biosensing

Background:

  • Necrotizing Enterocolitis (NEC) presents a significant challenge in neonatal care, contributing to high rates of morbidity and mortality.
  • Current diagnostic methods struggle to reliably distinguish NEC from neonatal sepsis, necessitating more sensitive tools.
  • Gut injury biomarkers are potential indicators for NEC diagnosis.

Purpose of the Study:

  • To develop and validate an ultrasensitive magnetic nanoparticle-based biosensor for diagnosing NEC.
  • To assess the biosensor's ability to differentiate NEC from neonatal sepsis and control groups.
  • To evaluate the diagnostic performance of specific gut injury biomarkers (CRP, MMp7, EpCAM) using the developed platform.

Main Methods:

  • A magnetic multiplexed biosensor platform was designed for parallel plasma analysis of C-reactive protein (CRP), matrix metalloproteinase-7 (MMp7), and epithelial cell adhesion molecule (EpCAM).
  • A pilot study compared plasma samples from neonates with sepsis (n=5), NEC (n=10), and controls (n=5).
  • Diagnostic performance was evaluated using receiver operating characteristic (ROC) area under the curve (AUC) analysis with bootstrapping.

Main Results:

  • The biosensor platform demonstrated robustness and ultrasensitivity, with limits of detection (LOD) of 0.6 pg/ml for CRP, 20 pg/ml for MMp7, and 20 pg/ml for EpCAM.
  • The combination of MMp7 and EpCAM achieved an ROC AUC of 0.96 for differentiating NEC from controls and 1.00 for differentiating NEC from sepsis.
  • A three-marker panel (EpCAM, MMp7, CRP) yielded ROC AUC values of 0.956 and 0.975, respectively.

Conclusions:

  • The developed multiplexed nano-biosensor platform shows significant promise as an ultrasensitive diagnostic instrument for NEC.
  • This technology has the potential to improve the clinical diagnosis of NEC, enabling timely and appropriate interventions.
  • Further exploration and clinical validation are warranted to integrate this tool into routine neonatal care.