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Sickle cell disease (SCD) is a genetic disorder which adversely affects cerebrovascular health. Previous studies have demonstrated regional cortical thinning in SCD. However, the reason behind regional reductions in cortical thickness remains unclear. Therefore, we aimed to explore the possible link between the state of cerebrovascular health and cortical thickness. In this study, we obtained magnetic resonance (MR) based measures of cerebrovascular reactivity (CVR), a measure of vascular health, and cortical thickness in SCD patients (N=60) and controls of similar age and similar gender ratio (N=27). The group comparison analysis revealed significant regionally specific reductions in CVR and cortical thickness in the SCD group compared to the controls. In addition, a regional association analysis was performed between CVR and cortical thickness in the SCD group which revealed a significant regional association in several brain regions with the highest strength of association observed in the left cuneus, right post central gyrus and the right temporal pole. The regional association analysis revealed that significant associations were found in brain regions with high metabolic activity (anterior cingulate, posterior cingulate, occipital gyrus, precuneus) thus demonstrating that these regions could be most vulnerable to structural damage under hypoxic conditions.

Original publication

DOI

10.1016/j.brainres.2016.03.041

Type

Journal article

Journal

Brain Res

Publication Date

01/07/2016

Volume

1642

Pages

263 - 269

Keywords

Blood oxygen level dependent imaging, Cerebrovascular reactivity, Cortical thickness, Magnetic resonance imaging, Pediatric, Sickle cell disease, Adolescent, Anemia, Sickle Cell, Cerebral Cortex, Child, Female, Humans, Magnetic Resonance Imaging, Male