White Matter Microstructure Alteration in Patients with Drug-Induced Parkinsonism: A Diffusion Tensor Imaging Study with Tract-Based Spatial Statistics

J Integr Neurosci. 2024 Nov 15;23(11):202. doi: 10.31083/j.jin2311202.

Abstract

Introduction: This research aimed to investigate the pathophysiological mechanism of how drug-induced parkinsonism (DIP) affects the integrity of the white matter (WM) fiber microstructure as measured by magnetic resonance diffusion tensor image (DTI) fractional anisotropy (FA) and mean diffusivity (MD).

Methods: We recruited 17 participants diagnosed with DIP, 20 Parkinson's disease (PD) patients, and 16 normal controls (NCs) with a similar age, gender, and years of education. Subsequently, all participants underwent DTI magnetic resonance imaging scanning. To analyze the data, we utilized the software packages Functional MRI of the Brain Centre (FMRIB) Diffusion Toolbox (FDT), developed by the FMRIB laboratory at Oxford University, and tract-based spatial statistics (TBSS).

Results: The Argentina Hyposmia Rating Scale (AHRS) scores of patients in DIP group were markedly higher than those in PD patients group. Compared with the NC group, the FA values in the genu and body of the corpus callosum (CC), anterior limb of the right internal capsule, bilateral anterior corona radiata, bilateral superior corona radiata, right external capsule, and right superior fronto-occipital fasciculus (could be a part of the anterior internal capsule) were significantly decreased in the DIP group; however, no significant cluster was found in MD.

Conclusions: The present study provides novel insights into the alterations in WM microstructure among DIP patients, suggesting that these methodologies have the potential to aid in the early diagnosis and treatment of DIP.

Keywords: diffusion tensor imaging; drug-induced parkinsonism; fractional anisotropy; mean diffusivity.

MeSH terms

  • Aged
  • Diffusion Tensor Imaging*
  • Female
  • Humans
  • Male
  • Middle Aged
  • Parkinson Disease / diagnostic imaging
  • Parkinson Disease / drug therapy
  • Parkinson Disease / pathology
  • Parkinson Disease, Secondary / chemically induced
  • Parkinson Disease, Secondary / diagnostic imaging
  • Parkinson Disease, Secondary / pathology
  • Parkinsonian Disorders / chemically induced
  • Parkinsonian Disorders / diagnostic imaging
  • Parkinsonian Disorders / pathology
  • White Matter* / diagnostic imaging
  • White Matter* / pathology