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Related Concept Videos

The Electron Transport Chain01:30

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Related Experiment Video

Updated: Dec 7, 2025

Inner Mitochondrial Membrane Sensitivity to Na+ Reveals Partially Segmented Functional CoQ Pools
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Oxidative phosphorylation in creatine transporter deficiency.

Shizhe Li1, Simona Bianconi2, Jan Willem van der Veen1

  • 1Molecular Imaging Branch, National Institute of Mental Health, Bethesda, Maryland.

NMR in Biomedicine
|September 29, 2020
PubMed
Summary

X-linked creatine transporter deficiency (CTD) significantly reduces brain creatine levels. Despite this, the brain maintains energy through oxidative metabolism, suggesting mitochondria as a therapeutic target for CTD.

Keywords:
1H MRS31P MRScreatinecreatine transporter deficiency

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Area of Science:

  • Biochemistry
  • Genetics
  • Neurology

Background:

  • X-linked creatine transporter deficiency (CTD) is a rare genetic disorder affecting brain creatine levels.
  • Pathogenic variants in the SLC6A8 gene cause CTD, leading to cerebral creatine deficiency.

Purpose of the Study:

  • To investigate brain energy metabolism in CTD using phosphorus magnetic resonance spectroscopy (31P MRS).
  • To explore potential therapeutic targets for X-linked creatine transporter deficiency.

Main Methods:

  • 31P MRS was employed to measure phosphocreatine and total creatine concentrations in patients with CTD.
  • Analysis of brain energy metabolites, including lactate and pH, to assess metabolic status.

Main Results:

  • 31P MRS revealed markedly reduced phosphocreatine and total creatine concentrations in CTD patients.
  • No significant elevation in lactate or decrease in pH was observed, indicating preserved oxidative metabolism.
  • Brain energy supply in CTD largely depends on oxidative metabolism despite creatine deficiency.

Conclusions:

  • Mitochondrial function represents a promising therapeutic avenue for X-linked creatine transporter deficiency.
  • Understanding brain energy dynamics in CTD is crucial for developing effective treatments.