A homogeneous fluorescent sensor for human serum albumin

Rongsheng E. Ross, Ling Tian, Yie Hwa Chang

Research output: Contribution to journalArticlepeer-review

71 Scopus citations

Abstract

Human serum albumin is the most abundant protein in the body and is an important biomarker used for disease-related diagnosis. Although the traditional enzyme-linked immunosorbent assay (ELISA) approach can precisely measure the concentration of human serum albumin, the multi-step procedure and time-consuming preparations of ELISA limit its diagnostic applications, preventing accurate point-of-care testing, for example. Herein, we report the recent development of an antibody-based albumin sensor that allows for a homogeneous measurement of albumin concentrations in saliva, urine and serum, in which this type of sensor is validated for the first time. The assay only requires simple mixing, and relies on time-resolved (TR) fluorescence resonance energy transfer (FRET) to produce robust, sensitive signals. The whole process, from sample preparation to final read-out, is expected to take less than 1. h and requires only a standard plate-reader, thus making the sensor a convenient and cost-effective tool for albumin analysis.

Original languageEnglish
Pages (from-to)165-169
Number of pages5
JournalJournal of Pharmaceutical and Biomedical Analysis
Volume63
DOIs
StatePublished - Apr 7 2012

Keywords

  • Enzyme-linked immunosorbent assay (ELISA)
  • Human serum albumin (HSA)
  • Sensor
  • Time-resolved fluorescence energy transfer (TR-FRET)

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