Related Experiment Video
Updated: Mar 26, 2026
Diffusion Tensor Magnetic Resonance Imaging in the Analysis of Neurodegenerative Diseases
Published on: July 28, 2013
Methadone-induced Damage to White Matter Integrity in Methadone Maintenance Patients: A Longitudinal Self-control DTI
Wei Li1, Qiang Li1, Yarong Wang1
1Department of Radiology, Tangdu Hospital, The Fourth Military Medical University, Xi'an, Shaanxi 710038, China.
Abstract:
Methadone maintenance treatment (MMT) can induce impairments in brain function and structure, despite its clinical effectiveness. However, the effect of chronic MMT on brain white matter (WM) is not fully known. Thirty-three MMT patients underwent diffusion tensor imaging (DTI) twice - at the start of the study (Scan1) and one year later (Scan2). Tract-based spatial statistics were used to investigate changes in fractional anisotropy (FA), axial diffusivity (AD) and radial diffusivity (RD) between the two scans. The correlations between DTI indices and methadone consumption and neuropsychological status were analysed. We found significantly decreased FA, decreased AD and increased RD in Scan2 in extensive WM regions; overlapping regions were found in the left posterior limb and the retrolenticular part of internal capsule, superior and posterior corona radiata, bilateral external capsule and the right superior longitudinal fasciculus. In addition, the change of FA in the overlapping regions was positively correlated with the accumulated dosage of methadone use, the RD value in Scan2 and non-planning impulsiveness (NPI) measured at follow-up. The results suggest that methadone has damaging effects on WM integrity. The dose-dependent pattern and characteristics of the impairment may suggest new strategies for MMT.
Insights
Methadone maintenance treatment may harm brain white matter integrity. Chronic use is linked to decreased fractional anisotropy and increased radial diffusivity, suggesting dose-dependent damage.
Area of Science:
- Neuroimaging
- Neuroscience
- Addiction Medicine
Background:
- Methadone maintenance treatment (MMT) is effective but may impact brain function and structure.
- The long-term effects of MMT on brain white matter (WM) require further investigation.
Purpose of the Study:
- To investigate the effects of chronic methadone maintenance treatment on brain white matter integrity.
- To explore correlations between white matter changes, methadone dosage, and neuropsychological status.
Main Methods:
- Diffusion tensor imaging (DTI) was used to assess white matter integrity in 33 MMT patients over one year.
- Tract-based spatial statistics analyzed changes in fractional anisotropy (FA), axial diffusivity (AD), and radial diffusivity (RD).
- Correlations between DTI indices, cumulative methadone dose, and neuropsychological measures were examined.
Main Results:
- Significant decreases in FA and AD, and increases in RD were observed in extensive WM regions after one year of MMT.
- Impaired regions included the internal capsule, corona radiata, external capsule, and superior longitudinal fasciculus.
- Changes in FA correlated positively with accumulated methadone dosage, RD, and non-planning impulsiveness.
Conclusions:
- Chronic methadone maintenance treatment is associated with damaging effects on white matter integrity.
- The observed dose-dependent pattern suggests potential neurotoxic effects of methadone on white matter.
- Findings may inform the development of new strategies for optimizing methadone maintenance treatment.
More Related Videos
Related Concept Videos
01:29Therapeutic Drug Monitoring: Affecting Factors
01:15Drug Abuse and Addiction: Pharmacological Phenomena