Related Experiment Video
Updated: May 29, 2026
10:59
Use of Label-free Optical Biosensors to Detect Modulation of Potassium Channels by G-protein Coupled Receptors
Published on: February 10, 2014
Development of a potassium ion-selective fluorescent sensor based on 3-styrylated BODIPY
Tomoya Hirata1, Takuya Terai, Toru Komatsu
1Graduate School of Pharmaceutical Sciences, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113 0033, Japan.
Bioorganic & Medicinal Chemistry Letters
|September 13, 2011
Summary
Researchers created B3TAC, a novel red-emitting fluorescent probe for potassium ions (K+). This probe offers high selectivity and can detect K+ in physiological ranges, enabling cellular measurements and simple visual detection.
Area of Science:
- Chemical Biology
- Analytical Chemistry
- Materials Science
Background:
- Potassium ion (K+) concentration is critical for cellular functions.
- Developing selective and sensitive probes for K+ detection remains a challenge.
Purpose of the Study:
- To develop a novel red-emitting fluorescent probe for selective K+ detection.
- To evaluate the probe's performance in physiological conditions and potential for cellular imaging.
Main Methods:
- Synthesis of B3TAC by conjugating a cryptand-based chelator (TAC) to a BODIPY fluorophore.
- Spectroscopic analysis of B3TAC's response to K+ in a water-acetonitrile solvent.
- Assessment of selectivity against other metal ions, including Na+.
Main Results:
- B3TAC exhibits red fluorescence and a wavelength shift upon binding to K+.
- The probe demonstrates high selectivity for K+ over Na+ and other ions within the physiological concentration range.
- B3TAC shows potential for measuring intracellular K+ levels and naked-eye K+ detection.
Conclusions:
- B3TAC is a promising fluorescent probe for K+ detection.
- Its selectivity and red-emission properties make it suitable for biological applications.
- The probe facilitates both quantitative cellular K+ measurements and qualitative visual detection.
