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Kullmann, S. ; Callaghan, M.F.* ; Heni, M. ; Weiskopf, N.* ; Scheffler, K.* ; Häring, H.-U. ; Fritsche, A. ; Veit, R. ; Preissl, H.

Specific white matter tissue microstructure changes associated with obesity.

Neuroimage 125, 36-44 (2015)
DOI PMC
Open Access Green as soon as Postprint is submitted to ZB.
Obesity-related structural brain alterations point to a consistent reduction in gray matter with increasing body mass index (BMI) but changes in white matter have proven to be more complex and less conclusive. Hence, more recently diffusion tensor imaging (DTI) has been employed to investigate microstructural changes in white matter structure. Altogether, these studies have mostly shown a loss of white matter integrity with obesity-related factors in several brain regions. However, the variety of these obesity-related factors, including inflammation and dyslipidemia, resulted in competing influences on the DTI indices. To increase the specificity of DTI results, we explored specific brain tissue properties by combining DTI with quantitative multi-parameter mapping in lean, overweight and obese young adults. By means of multi-parameter mapping, white matter structures showed differences in MRI parameters consistent with reduced myelin, increased water and altered iron content with increasing BMI in the superior longitudinal fasciculus, anterior thalamic radiation, internal capsule and corpus callosum. BMI-related changes in DTI parameters revealed mainly alterations in mean and axial diffusivity with increasing BMI in the corticospinal tract, anterior thalamic radiation and superior longitudinal fasciculus. These alterations, including mainly fiber tracts linking limbic structures with prefrontal regions, could potentially promote accelerated aging in obese individuals leading to an increased risk for cognitive decline.
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Publication type Article: Journal article
Document type Scientific Article
Corresponding Author
Keywords Dti ; Multi-parametric Mapping ; Obesity ; Quantitative Mri
ISSN (print) / ISBN 1053-8119
e-ISSN 1095-9572
Journal NeuroImage - a Journal of Brain Function
Quellenangaben Volume: 125, Issue: , Pages: 36-44 Article Number: , Supplement: ,
Publisher Elsevier
Non-patent literature Publications
Reviewing status Peer reviewed
Institute(s) Institute of Diabetes Research and Metabolic Diseases (IDM)