Abstract
Introduction: Parkinson’s disease (PD) is a motor disorder that initially presents with unilateral symptoms. Widespread white matter (WM) alterations have been reported since the early stages of the disease. The aim of this study was to investigate WM alterations in right-dominant and left-dominant symptom PD patients (RPD and LPD, respectively) with respect to healthy controls (HC) by diffusion-weighted magnetic resonance imaging (MRI). Methods: Thirty-eight subjects participated in this study: 12 RPD (median H&Y [IQR] = 1.5 [1.1–2], median UPDRS III [IQR] = 23 [7.8–25]), 9 LPD (median H&Y [IQR] = 1.5 [1–2.5], median UPDRS III [IQR] = 17 [12–22]), and 17 HC. All the participants were scanned on a 1.5-T MRI scanner. Maps of fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were computed for all the subjects. Tract-based spatial statistics (TBSS) was performed for each diffusion parameter, to test WM differences between RPD, LPD, and HC (ANCOVA design). Family-wise error (FWE) correction was performed and p values lower than 0.05 were considered significant. Results: No significant FA and RD differences were observed between RPD, LPD, and HC. Significantly increased MD and AD were observed in RPD with respect to HC within widespread WM regions, bilaterally. Conversely, no significant WM alterations were detected in LPD. Conclusion: WM integrity was found to be significantly altered in RPD but not in LPD, suggesting that LPD profile may be associated to more favorable prognosis. Since clinical laterality onset may affect the extent of WM integrity changes, it should be taken into account in neuroimaging studies investigating PD.
| Original language | English |
|---|---|
| Journal | Neurological Sciences |
| DOIs | |
| Publication status | E-pub ahead of print - Oct 24 2019 |
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Keywords
- Clinical laterality onset
- Diffusion tensor MRI
- Parkinson’s disease
- TBSS
- White matter
- White matter alterations
ASJC Scopus subject areas
- Dermatology
- Clinical Neurology
- Psychiatry and Mental health
Cite this
White matter alterations in early Parkinson’s disease : role of motor symptom lateralization. / Pelizzari, Laura; Di Tella, Sonia; Laganà, Maria M.; Bergsland, Niels; Rossetto, Federica; Nemni, Raffaello; Baglio, Francesca.
In: Neurological Sciences, 24.10.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - White matter alterations in early Parkinson’s disease
T2 - role of motor symptom lateralization
AU - Pelizzari, Laura
AU - Di Tella, Sonia
AU - Laganà, Maria M.
AU - Bergsland, Niels
AU - Rossetto, Federica
AU - Nemni, Raffaello
AU - Baglio, Francesca
PY - 2019/10/24
Y1 - 2019/10/24
N2 - Introduction: Parkinson’s disease (PD) is a motor disorder that initially presents with unilateral symptoms. Widespread white matter (WM) alterations have been reported since the early stages of the disease. The aim of this study was to investigate WM alterations in right-dominant and left-dominant symptom PD patients (RPD and LPD, respectively) with respect to healthy controls (HC) by diffusion-weighted magnetic resonance imaging (MRI). Methods: Thirty-eight subjects participated in this study: 12 RPD (median H&Y [IQR] = 1.5 [1.1–2], median UPDRS III [IQR] = 23 [7.8–25]), 9 LPD (median H&Y [IQR] = 1.5 [1–2.5], median UPDRS III [IQR] = 17 [12–22]), and 17 HC. All the participants were scanned on a 1.5-T MRI scanner. Maps of fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were computed for all the subjects. Tract-based spatial statistics (TBSS) was performed for each diffusion parameter, to test WM differences between RPD, LPD, and HC (ANCOVA design). Family-wise error (FWE) correction was performed and p values lower than 0.05 were considered significant. Results: No significant FA and RD differences were observed between RPD, LPD, and HC. Significantly increased MD and AD were observed in RPD with respect to HC within widespread WM regions, bilaterally. Conversely, no significant WM alterations were detected in LPD. Conclusion: WM integrity was found to be significantly altered in RPD but not in LPD, suggesting that LPD profile may be associated to more favorable prognosis. Since clinical laterality onset may affect the extent of WM integrity changes, it should be taken into account in neuroimaging studies investigating PD.
AB - Introduction: Parkinson’s disease (PD) is a motor disorder that initially presents with unilateral symptoms. Widespread white matter (WM) alterations have been reported since the early stages of the disease. The aim of this study was to investigate WM alterations in right-dominant and left-dominant symptom PD patients (RPD and LPD, respectively) with respect to healthy controls (HC) by diffusion-weighted magnetic resonance imaging (MRI). Methods: Thirty-eight subjects participated in this study: 12 RPD (median H&Y [IQR] = 1.5 [1.1–2], median UPDRS III [IQR] = 23 [7.8–25]), 9 LPD (median H&Y [IQR] = 1.5 [1–2.5], median UPDRS III [IQR] = 17 [12–22]), and 17 HC. All the participants were scanned on a 1.5-T MRI scanner. Maps of fractional anisotropy (FA), mean diffusivity (MD), axial diffusivity (AD), and radial diffusivity (RD) were computed for all the subjects. Tract-based spatial statistics (TBSS) was performed for each diffusion parameter, to test WM differences between RPD, LPD, and HC (ANCOVA design). Family-wise error (FWE) correction was performed and p values lower than 0.05 were considered significant. Results: No significant FA and RD differences were observed between RPD, LPD, and HC. Significantly increased MD and AD were observed in RPD with respect to HC within widespread WM regions, bilaterally. Conversely, no significant WM alterations were detected in LPD. Conclusion: WM integrity was found to be significantly altered in RPD but not in LPD, suggesting that LPD profile may be associated to more favorable prognosis. Since clinical laterality onset may affect the extent of WM integrity changes, it should be taken into account in neuroimaging studies investigating PD.
KW - Clinical laterality onset
KW - Diffusion tensor MRI
KW - Parkinson’s disease
KW - TBSS
KW - White matter
KW - White matter alterations
UR - http://www.scopus.com/inward/record.url?scp=85074592465&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85074592465&partnerID=8YFLogxK
U2 - 10.1007/s10072-019-04084-y
DO - 10.1007/s10072-019-04084-y
M3 - Article
C2 - 31650438
AN - SCOPUS:85074592465
JO - Neurological Sciences
JF - Neurological Sciences
SN - 1590-1874
ER -