Fluorescent Magnesium IndicatorsA non-invasive approach in which Magnesium (Mg2+) ion levels can be measured in real-time. Mg2+ is essential to many physio-chemical processes and plays a central role in the biochemistry of all cells. Many epidemiological studies have established close association between plasma magnesium levels and various diseases including cardiovascular disease and hypertension. However, methods and tools to selectively measure cellular magnesium levels in the body with accuracy and reliability are still lacking in the market today. The present invention provides novel fluorescent indicators (carboxy-quinolizones) that are selective for Mg2+ and can be easily detected using fluorescence spectroscopy.
Current approaches used to measure intracellular magnesium in the body generally involve magnetic resonance spectroscopy, which is extremely expensive and subject to very poor accuracy. Unlike these other methods, the fluorescence indicators of this invention provide a more accurate way to measure intracellular and extracellular Mg2+ levels in a wide variety of biological settings and have potential to be developed into diagnostic reagents.
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