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Related Experiment Video

Updated: May 5, 2026

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Ultrasensitive Human Urinary Albumin Detection via Composite Nanohydrogels.

Özge Altıntaş1, Fatma Yılmaz2, Elif Serra Taş3

  • 1Department of Chemistry, Hacettepe University, 06800 Ankara, Turkey.

Micromachines
|May 4, 2026
PubMed
Summary

A novel nanohydrogel with carbon dots selectively detects albumin in urine, crucial for diagnosing kidney problems. This advancement offers a sensitive and stable method for biomarker analysis.

Keywords:
C-Dotsalbuminbiomolecule detectionmolecular imprinting technologynanohydrogel

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Area of Science:

  • Biomaterials Science
  • Analytical Chemistry
  • Nanotechnology

Background:

  • Albumin is a key biomarker in biological fluids.
  • Sensitive detection of urinary albumin is vital for diagnosing renal dysfunction.
  • Existing methods may lack sensitivity or selectivity for low albumin concentrations.

Purpose of the Study:

  • To develop a composite nanohydrogel for selective albumin detection in human urine.
  • To utilize molecular imprinting and carbon dots for enhanced recognition and sensitivity.
  • To evaluate the performance of the developed nanohydrogel in complex biological matrices.

Main Methods:

  • Synthesis of albumin-imprinted composite nanohydrogels modified with carbon dots (C-Dots).
  • Characterization using ZetaSizer, SEM, EDX, CLSM, and ATR-FTIR.
  • Evaluation of albumin binding capacity and selectivity via fluorescence spectroscopy.
  • Assessment of matrix effects using artificial urine samples.

Main Results:

  • The nanohydrogel demonstrated high selectivity, detecting albumin four times more effectively than interfering proteins (Hb, IgG).
  • Fluorescence spectroscopy confirmed efficient albumin binding to the nanohydrogels.
  • Studies in artificial urine samples indicated minimal matrix effects.
  • Repeatability and long-term stability tests (%RSD) confirmed consistent performance over six months.

Conclusions:

  • The developed carbon dot-modified albumin-imprinted nanohydrogel is a promising tool for sensitive and selective urinary albumin detection.
  • This approach offers a stable and reliable method for biomarker analysis, aiding in the early diagnosis of kidney-related diseases.
  • The nanohydrogel's performance in simulated biological conditions highlights its potential for clinical applications.