Analysis of diffusion tensor parameters in spinocerebellar ataxia type 3 and type 10 patients. (September 2020)

• Record Type: Journal Article
• Authors: Meira, Alex Tiburtino; Arruda, Walter Oleschko; Ono, Sergio Eiji; Franklin, Gustavo Leite; de Carvalho Neto, Arnolfo; Raskin, Salmo; Ashizawa, Tetsuo; Camargo, Carlos Henrique F.; Teive, Hélio A.G.
• Is Part Of: Parkinsonism & related disorders. Volume 78(2020)
• Page Start: 73
• Page End: 78
• Publication Date: 2020-09
• Subjects: Spinocerebellar ataxias -- Machado-Joseph disease -- Ataxins -- Neuroimaging -- Magnetic resonance image -- Diffusion tensor imaging -- FreeSurfer; Parkinson's disease -- Periodicals; Movement disorders -- Periodicals; Movement Disorders -- Periodicals; Nerve Degeneration -- Periodicals; Nervous System Diseases -- Periodicals; Parkinson Disease -- Periodicals; Tremor -- Periodicals; Parkinson, Maladie de -- Périodiques; Parkinson's disease; 616.833
• DOI: 10.1016/j.parkreldis.2020.06.460
• Languages: English
• ISSNs: 1353-8020

Abstract

Abstract: Introduction: There is a dearth of studies of spinocerebellar ataxias (SCAs) and diffusion tensor magnetic resonance imaging (DTI). Objective: To analyze changes observed in DTI parameters and correlate these to clinical findings in SCA3 and SCA10 patients. Methods: SCA3 (n = 19) and SCA10 (n = 18) patients were compared with a similar number of controls and assessed clinically and with the scale for the assessment and rating of ataxia (SARA) before undergoing the same MRI protocol. TRACULA (TRActs Constrained by UnderLying Anatomy) software was used to analyze the DTI metrics FA, AD, RD and MD. Results: More white matter fiber tracts with changes in diffusivity were found in SCA3 patients than in SCA10 patients. There was a reduction in AD in altered fiber tracts in SCA3 and a greater increase in RD in SCA10. In the SCA3 patients, FA was reduced in the corticospinal tract (CST) and inferior longitudinal fasciculus (ILF), but this was not observed in the SCA10 patients. SARA score was correlated with DTI findings in SCA3 but not in SCA10. Conclusion: Changes were observed in DTI for both SCA3 and SCA10 but were more widespread in SCA3. Our finding of myelin-sheath changes in SCA10 and secondary axonal changes in SCA3 may reflect the more rapid, aggressive clinical course of SCA3. Highlights: SCA3 showed more fiber tracts with changes in diffusivity than SCA10. SARA score was correlated with DTI findings only in SCA3. SCA10 showed myelin-sheath related changes in white matter fiber tracts. SCA3 showed myelin-sheath changes and secondary axonal changes in fiber tracts.