Development of a high-accuracy, low-cost, and portable fluorometer with smartphone application for the detection of urinary albumin towards the early screening of chronic kidney and renal diseases

Visarute Pinrod, Wireeya Chawjiraphan, Khoonsake Segkhoonthod, Kriangkai Hanchaisri, Phornpol Tantiwathanapong, Preedee Pinpradup, Thitirat Putnin, Dechnarong Pimalai, Kiatnida Treerattrakoon, Ubon Cha’on, Sirirat Anutrakulchai, Deanpen Japrung

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Abstract

This study presents the development of a portable fluorometer with a smartphone application designed to facilitate the early screening of chronic kidney and renal diseases by enabling the sensitive detection of urinary albumin. Utilizing a fluorescence-based aptasensor, the device achieved a linear calibration curve (0.001–1.5 mg/mL) with a linearity of up to 0.98022 and a detection limit of 0.203 µg/mL for human serum albumin (HSA). The analysis of 130 urine samples demonstrated comparable performance between this study’s fluorometer, a commercial fluorometer, and the standard automated method. These findings validate the feasibility of the portable fluorometer and aptasensor combination as a reliable instrument for the sensitive and specific measurement of HSA in urine samples. Moreover, the fluorometer’s portability offers potential applications in portable point-of-care testing, enhancing its utility in clinical settings for early disease screening.
Original languageEnglish
Article number876
Number of pages17
JournalBiosensors
Volume13
Issue number9
DOIs
Publication statusPublished - 8 Sept 2023

Keywords

  • albuminuria
  • aptasensor
  • fluorescence quenching
  • portable fluorometer
  • chronic kidney disease
  • renal disease

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