BACKGROUND/ PURPOSE: Previous imaging studies in the Machado-Joseph disease (MJD/SCA3) have mostly concentrated on the cerebellum and brainstem. Our goal was to perform a whole brain longitudinal evaluation. METHODS: We included 45 patients and 51 controls, who underwent two brain magnetic resonance imaging and magnetic resonance spectroscopy (mean interval of 12.5 ± 1.5 months). We used voxel-based morphometry (VBM) and the MarsBar analysis toolbox to extract grey matter density (GMD) values from regions of interest. We used a linear regression model and a general linear model to correlate GMD with clinical markers, and paired t-test for the longitudinal evaluation. RESULTS: We observed decreased GMD (P < .01) at frontal, parietal, temporal and occipital lobes, subcortical grey matter, cerebellum, and brainstem. White matter atrophy was restricted to the cerebellum. Age, CAG, and disease duration predicted GMD in different areas, but age and CAG were the most important predictors. The longitudinal analysis failed to demonstrate changes. Changes in regions other than the cerebellum appeared to contribute significantly to the final International Cooperative Ataxia Rating Scale score. CONCLUSION: We confirmed cortical involvement in MJD/SCA3. The most important factors in predicting GMD were age and CAG. The lack of progression of atrophy may indicate floor effect and/or short duration of follow-up.
BACKGROUND/ PURPOSE: Previous imaging studies in the Machado-Joseph disease (MJD/SCA3) have mostly concentrated on the cerebellum and brainstem. Our goal was to perform a whole brain longitudinal evaluation. METHODS: We included 45 patients and 51 controls, who underwent two brain magnetic resonance imaging and magnetic resonance spectroscopy (mean interval of 12.5 ± 1.5 months). We used voxel-based morphometry (VBM) and the MarsBar analysis toolbox to extract grey matter density (GMD) values from regions of interest. We used a linear regression model and a general linear model to correlate GMD with clinical markers, and paired t-test for the longitudinal evaluation. RESULTS: We observed decreased GMD (P < .01) at frontal, parietal, temporal and occipital lobes, subcortical grey matter, cerebellum, and brainstem. White matter atrophy was restricted to the cerebellum. Age, CAG, and disease duration predicted GMD in different areas, but age and CAG were the most important predictors. The longitudinal analysis failed to demonstrate changes. Changes in regions other than the cerebellum appeared to contribute significantly to the final International Cooperative Ataxia Rating Scale score. CONCLUSION: We confirmed cortical involvement in MJD/SCA3. The most important factors in predicting GMD were age and CAG. The lack of progression of atrophy may indicate floor effect and/or short duration of follow-up.
Authors: Pedro Braga-Neto; Lívia Almeida Dutra; José Luiz Pedroso; André C Felício; Helena Alessi; Ruth F Santos-Galduroz; Paulo Henrique F Bertolucci; Mário Luiz V Castiglioni; Rodrigo Affonseca Bressan; Griselda Esther Jara de Garrido; Orlando Graziani Povoas Barsottini; Andrea Jackowski Journal: Cerebellum Date: 2012-12 Impact factor: 3.847
Authors: Maria do Carmo Costa; Maria Radzwion; Hayley S McLoughlin; Naila S Ashraf; Svetlana Fischer; Vikram G Shakkottai; Patrícia Maciel; Henry L Paulson; Gülin Öz Journal: Mov Disord Date: 2020-07-04 Impact factor: 10.338
Authors: Lauren R Moore; Laura Keller; David D Bushart; Rodrigo G Delatorre; Duojia Li; Hayley S McLoughlin; Maria do Carmo Costa; Vikram G Shakkottai; Gary D Smith; Henry L Paulson Journal: Stem Cell Res Date: 2019-07-16 Impact factor: 2.020