Related Experiment Videos
Regulation of cellular magnesium
1Department of Physiology and Biophysics, Case Western Reserve University, Cleveland, OH, 44106-4970, USA.
Frontiers in Bioscience : a Journal and Virtual Library
|August 3, 2000
Summary
Cellular magnesium (Mg2+) levels are not constant, challenging long-held beliefs. New research shows significant Mg2+ fluxes across cell membranes, impacting enzyme activity and tissue function.
Area of Science:
- Biochemistry
- Cell Biology
- Physiology
Background:
- Magnesium (Mg2+) is crucial for over 350 enzymes and cellular functions.
- Previously, cellular Mg2+ was thought to be tightly regulated and constant.
- This view is challenged by recent findings on Mg2+ homeostasis.
Purpose of the Study:
- To review current understanding of cellular magnesium regulation.
- To highlight new evidence on Mg2+ fluxes and their physiological impact.
- To explore how Mg2+ level changes affect enzyme activity.
Main Methods:
- Literature review of recent experimental observations.
- Analysis of data on hormonal and non-hormonal stimuli affecting Mg2+.
- Synthesis of findings on Mg2+ transport and cellular content.
Main Results:
- Cellular Mg2+ is dynamic, with significant fluxes across the plasma membrane.
- Hormonal and non-hormonal stimuli induce changes in total and free Mg2+.
- These changes correlate with altered circulating Mg2+ levels and enzyme activity.
Conclusions:
- The concept of constant cellular Mg2+ is outdated.
- Dynamic Mg2+ shifts are integral to cellular signaling and function.
- Understanding Mg2+ fluxes is key to comprehending cellular enzyme regulation.