Energy failure in multiple sclerosis and its investigation using MR techniques.

Area of Science:

• Neuroscience
• Biophysics
• Medical Imaging

Background:

• Energy failure is a growing area of research in multiple sclerosis (MS).
• Axonal damage in MS increases neuronal energy demand.
• Inflammation and reduced brain perfusion may impair mitochondrial function and energy supply.

Purpose of the Study:

• To review magnetic resonance (MR) techniques for assessing energy metabolism in vivo.
• To explore the application of these MR techniques in neurological conditions, particularly MS.
• To highlight the potential of combined MR approaches for understanding MS pathophysiology and treatment outcomes.

Main Methods:

• Magnetic Resonance (MR) spectroscopy for N-acetyl aspartate (NAA) and lactate.
• Phosphorous-31 ((31)P) and Sodium-23 ((23)Na) MR for energy availability and sodium handling.
• MR perfusion imaging for oxygen delivery and utilization (deoxyhemoglobin).

Main Results:

• MR spectroscopy can assess mitochondrial function (NAA) and glycolysis (lactate).
• (31)P and (23)Na MR enable direct measurement of energy reserves and axonal sodium balance.
• Perfusion MR quantifies oxygen delivery, with emerging techniques for utilization.

Conclusions:

• Combined MR techniques provide a comprehensive view of energy metabolism in MS.
• These methods can offer insights into the underlying pathophysiology of MS.
• MR-based measures may serve as valuable outcome indicators for novel MS therapies.