Using Temporally and Spatially Resolved Measurements to Improve the Sensitivity of Fluorescence-Based Immunoassays

Autor: Ran Kremer, Shira Roth, Avital Bross, Amos Danielli, Yair Noam
Jazyk: angličtina
Rok vydání: 2024
Předmět:
Zdroj: Biosensors, Vol 14, Iss 5, p 220 (2024)
Druh dokumentu: article
ISSN: 2079-6374
DOI: 10.3390/bios14050220
Popis: Detecting low concentrations of biomarkers is essential in clinical laboratories. To improve analytical sensitivity, especially in identifying fluorescently labeled molecules, typical optical detection systems, consisting of a photodetector or camera, utilize time-resolved measurements. Taking a different approach, magnetic modulation biosensing (MMB) is a novel technology that combines fluorescently labeled probes and magnetic particles to create a sandwich assay with the target molecules. By concentrating the target molecules and then using time-resolved measurements, MMB provides the rapid and highly sensitive detection of various biomarkers. Here, we propose a novel signal-processing algorithm that enhances the detection and estimation of target molecules at low concentrations. By incorporating both temporally and spatially resolved measurements using human interleukin-8 as a target molecule, we show that the new algorithm provides a 2–4-fold improvement in the limit of detection and an ~25% gain in quantitative resolution.
Databáze: Directory of Open Access Journals