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Overexpression of the mitochondrial Mg channel MRS2 increases total cellular Mg concentration and influences

Lucia Merolle1, Gerhard Sponder, Azzurra Sargenti

  • 1Transfusion Medicine Unit, Azienda Unità Sanitaria Locale-IRCCS di Reggio Emilia, 42123, Italy. lucia.merolle@gmail.com.

Metallomics : Integrated Biometal Science
|June 29, 2018
PubMed

Insights

The mitochondrial magnesium channel MRS2 controls intracellular magnesium levels. Overexpressing MRS2 increases cellular magnesium, enhancing cell resistance to apoptosis and improving cell viability.

Area of Science:

  • Cellular Biology
  • Mitochondrial Physiology
  • Ion Channel Function

Background:

  • The mitochondrial magnesium channel MRS2 is crucial for cell viability, but its precise mechanism of action is unknown.
  • MRS2 deletion impairs mitochondrial function and leads to cell death, highlighting its importance.

Purpose of the Study:

  • To investigate the role of MRS2 in regulating intracellular magnesium (Mg) concentration.
  • To determine how altered Mg levels due to MRS2 influence cell viability and apoptosis.

Main Methods:

  • Overexpression of the MRS2 gene in HEK-293 cells to increase MRS2 levels.
  • Measurement of total intracellular Mg concentration in MRS2-overexpressing cells.
  • Treatment of cells with apoptotic inducers to assess cell viability and responsiveness.

Main Results:

  • Overexpression of MRS2 led to a significant increase in total intracellular Mg concentration.
  • MRS2-overexpressing cells exhibited reduced sensitivity to pharmacological apoptotic stimuli.
  • This suggests a protective role for elevated intracellular Mg mediated by MRS2.

Conclusions:

  • The MRS2 channel plays a key role in controlling overall intracellular Mg levels.
  • Altered intracellular Mg concentration, regulated by MRS2, may influence apoptotic signaling pathways.
  • MRS2-mediated Mg regulation is a potential target for modulating cell death and survival.

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