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Ratiometric Ca²⁺ measurements using the FlexStation(®)Scanning Fluorometer.

Ian C B Marshall¹, Izzy Boyfield, Shaun McNulty

¹Neurology & GI Centre of Excellence for Drug Discovery, GlaxoSmithKline Research and Development Limited, Harlow, Essex, UK.

Methods in Molecular Biology (Clifton, N.J.)

|September 26, 2012

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The FlexStation Scanning Fluorometer measures intracellular calcium (Ca2+) levels using fluorescent probes. This guide details methods for assessing Ca2+ concentration with ratiometric dyes on the FlexStation system.

Area of Science:

Biochemistry
Cell Biology
Analytical Chemistry

Background:

Intracellular calcium (Ca2+) plays a crucial role in various cellular processes.
Accurate measurement of Ca2+ concentration is essential for understanding cell signaling.
Fluorescence-based assays are widely used for monitoring Ca2+ dynamics.

Purpose of the Study:

To describe generic methods for assessing intracellular Ca2+ concentration.
To detail the use of the FlexStation Scanning Fluorometer for Ca2+ measurements.
To explain the application of ratiometric dyes with the FlexStation system.

Main Methods:

Utilizing the FlexStation Scanning Fluorometer, a fluorescence plate reader.
Employing both single-wavelength and dual-wavelength fluorescent probes for Ca2+ detection.

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Implementing a fluid transfer system for compound addition during data acquisition.

Controlling experimental temperature between room temperature and 45°C.

Main Results:

The FlexStation system allows for flexible use of various fluorescent indicators via monochromators.
The instrument supports a wide range of plate sizes for diverse experimental needs.
Ratiometric dye-based methods enable accurate assessment of intracellular Ca2+.

Conclusions:

The FlexStation Scanning Fluorometer is a versatile tool for measuring intracellular Ca2+ concentration.
Generic methods using ratiometric dyes provide a reliable approach for Ca2+ assessment.
This chapter serves as a guide for researchers utilizing the FlexStation for Ca2+ studies.