Research Abstracts Online
January 2010 - March 2011
University of Minnesota Twin Cities
PI: Elsa G. Shapiro
Brain Structure and Function in MPS I, II, and VI
The purpose of this study is to better understand the brain pathophysiology that results in cognitive and behavioral abnormality or decline in mucopolysaccharidoses (MPSs). MPSs are a group of inherited metabolic diseases in which a defective or missing enzyme results in the accumulation of harmful amounts of mucopolysaccharides (complex sugar molecules) in cells and tissues. There are six different types of MPS disorders with varying degrees of severity and a characteristic phenotype. This study includes measures of cognitive ability, attention, memory, and visual-spatial skills as well as acquisition of high-field (3 Tesla) images for volumetric analysis and for diffusion tensor imaging and calculation of fractional anisotropy (FA) values. Preliminary analysis of this data suggests specificity for hippocampal/memory impairment. Poor FA correlates with slow reaction time and poor attention, presumably due to poor white matter connectivity in the brain. The researchers are now in their second year of the longitudinal study.
Alia Ahmed, Research Associate
Igor Nestrasil, Research Associate