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Photoluminescence offers a wide range of applications due to its inherent sensitivity and selectivity. This technique allows for both direct and indirect analyses of the analyte. Direct quantitative analysis is possible when the analyte exhibits a favorable quantum yield for fluorescence or phosphorescence. However, an indirect analysis may be feasible if the analyte is not fluorescent or phosphorescent, or if the quantum yield is unfavorable. Indirect methods include reacting the analyte with...
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Related Experiment Video

Updated: Jun 23, 2025

Highly Sensitive and Rapid Fluorescence Detection with a Portable FRET Analyzer
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Developing a Portable Autofluorescence Detection System and Its Application in Biological Samples.

Jiaxing Zhou1, Yunfei Li1, Jinfeng Zhang1

  • 1School of Biomedical Engineering, Hainan University, Sanya 572000, China.

Sensors (Basel, Switzerland)
|June 19, 2024
PubMed
Summary
This summary is machine-generated.

A new portable autofluorescence system detects advanced glycation end-products (AGEs) in skin. This technology aids in early chronic disease diagnosis, particularly for diabetes mellitus (DM), by monitoring AGEs levels non-invasively.

Keywords:
advanced glycation end-products (AGEs)diabetes managementfluorescence monitoringportable detection system

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Area of Science:

  • Biomedical Engineering
  • Analytical Chemistry
  • Medical Diagnostics

Background:

  • Advanced glycation end-products (AGEs) are biomarkers linked to chronic diseases like diabetes mellitus (DM).
  • Existing AGEs detection methods lack suitability for large-scale population screening and long-term patient monitoring.
  • Non-invasive, portable diagnostic tools are needed for early disease detection and management.

Purpose of the Study:

  • To develop and validate a portable autofluorescence detection system for quantifying skin AGEs.
  • To assess the correlation between skin AGEs levels and established health indicators such as glycated hemoglobin and blood sugar.
  • To explore the relationship between AGEs and demographic/lifestyle factors for predictive modeling.

Main Methods:

  • A portable autofluorescence system utilizing a 395 nm laser LED for excitation and a photodetector for intensity measurement was designed.
  • A 520 nm light source was incorporated for skin optical property calibration.
  • The system's performance was validated on 14 volunteers, correlating AGEs fluorescence with glycated hemoglobin and blood glucose levels over time.

Main Results:

  • A correlation coefficient of 0.49 was observed between skin AGEs and glycated hemoglobin.
  • Long-term monitoring demonstrated a strong correlation trend (>0.95) between AGEs fluorescence and blood sugar levels.
  • Multivariate analysis revealed correlations between AGEs and age, BMI, gender, and physical activity index.

Conclusions:

  • The developed portable autofluorescence system offers a viable method for non-invasive AGEs detection.
  • Skin AGEs levels correlate with blood sugar control and can serve as an indicator for long-term glucose monitoring.
  • AGEs levels are influenced by multiple factors, suggesting potential for predictive modeling in chronic disease management.