A homogeneous fluorescent sensor for human serum albumin

Area of Science:

• Biochemistry
• Biomedical Engineering
• Analytical Chemistry

Background:

• Human serum albumin (HSA) is the most abundant protein in blood plasma and a crucial biomarker for disease diagnosis.
• Traditional methods like ELISA for HSA quantification are precise but involve complex, time-consuming procedures, hindering point-of-care applications.
• There is a need for rapid, sensitive, and cost-effective diagnostic tools for HSA analysis.

Purpose of the Study:

• To develop and validate a novel antibody-based sensor for homogeneous measurement of albumin concentrations.
• To demonstrate the sensor's utility in diverse biological samples including saliva, urine, and serum.
• To establish a faster and more convenient alternative to existing HSA detection methods.

Main Methods:

• Development of an antibody-based sensor utilizing time-resolved fluorescence resonance energy transfer (TR-FRET).
• Homogeneous assay format requiring simple sample mixing, eliminating complex preparation steps.
• Validation of the sensor's performance using standard plate-reader technology.

Main Results:

• The developed sensor provides robust and sensitive detection of albumin concentrations.
• The assay is validated for the first time in saliva, urine, and serum samples.
• The entire analytical process, from sample preparation to result acquisition, is completed in under one hour.

Conclusions:

• The novel antibody-based albumin sensor offers a convenient, cost-effective, and rapid solution for HSA quantification.
• This TR-FRET based assay facilitates point-of-care testing and broadens diagnostic applications for albumin analysis.
• The sensor represents a significant advancement in biomarker detection, enabling faster disease diagnosis.