PURPOSE: To determine to what extent T1- and T2-regional lesion volumes (RLVs) contribute to total and/or regional gray matter (GM) atrophy in multiple sclerosis (MS). METHODS: We studied 110 (67 relapsing-remitting and 43 secondary-progressive) MS patients. SABRE program was used to parcel the brain into 13 regions per hemisphere. Total and regional GM fractions (GMFs) were determined in each region to correct for intraregional size variability. Partial correlations were used to determine associations (holding the converse constant) between RLVs, GMF, and regional GMFs (P < .001 to avoid Type 1 error). RESULTS: Partial correlations between RLVs and regional GMFs (controlling for total GMF) for the total MS group were not significant for any of the 26 regions for T2, whereas they were significant for two of the 26 regions for T1. Partial correlations between RLVs and total GMF (controlling for regional GMF) for the total MS group were significant in 9 of 26 regions for T2 (largest r = right lateral inferior frontal, -.45) and 5 of 26 regions for T1 (largest r = right inferior parietal, -.45). CONCLUSIONS: Results suggest a model whereby a distinct generalized disease process accounts for GM atrophy better than regionally distinct Wallerian degeneration.
PURPOSE: To determine to what extent T1- and T2-regional lesion volumes (RLVs) contribute to total and/or regional gray matter (GM) atrophy in multiple sclerosis (MS). METHODS: We studied 110 (67 relapsing-remitting and 43 secondary-progressive) MS patients. SABRE program was used to parcel the brain into 13 regions per hemisphere. Total and regional GM fractions (GMFs) were determined in each region to correct for intraregional size variability. Partial correlations were used to determine associations (holding the converse constant) between RLVs, GMF, and regional GMFs (P < .001 to avoid Type 1 error). RESULTS: Partial correlations between RLVs and regional GMFs (controlling for total GMF) for the total MS group were not significant for any of the 26 regions for T2, whereas they were significant for two of the 26 regions for T1. Partial correlations between RLVs and total GMF (controlling for regional GMF) for the total MS group were significant in 9 of 26 regions for T2 (largest r = right lateral inferior frontal, -.45) and 5 of 26 regions for T1 (largest r = right inferior parietal, -.45). CONCLUSIONS: Results suggest a model whereby a distinct generalized disease process accounts for GM atrophy better than regionally distinct Wallerian degeneration.
Authors: N Bergsland; D Horakova; M G Dwyer; O Dolezal; Z K Seidl; M Vaneckova; J Krasensky; E Havrdova; R Zivadinov Journal: AJNR Am J Neuroradiol Date: 2012-04-12 Impact factor: 3.825
Authors: Khader M Hasan; Indika S Walimuni; Humaira Abid; Richard E Frye; Linda Ewing-Cobbs; Jerry S Wolinsky; Ponnada A Narayana Journal: J Neurosci Date: 2011-11-16 Impact factor: 6.167
Authors: Blake C Jones; Govind Nair; Colin D Shea; Ciprian M Crainiceanu; Irene C M Cortese; Daniel S Reich Journal: Neuroimage Clin Date: 2013-08-13 Impact factor: 4.881
Authors: Carolina de Medeiros Rimkus; Thiago de Faria Junqueira; Dagoberto Callegaro; Maria Concepción García Otaduy; Claudia da Costa Leite Journal: Clinics (Sao Paulo) Date: 2013 Impact factor: 2.365