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Cortical thickness and subcortical volume abnormalities in male crack-cocaine users

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Augusto Martins Lucas Bittencourt, Vinicius Faccin Bampi, Rafael Canani Sommer, Vanessa Schaker, Mario Francisco Pereira Juruena, Ricardo Bernardi Soder, Alexandre Rosa Franco, Breno Sanvicente-Vieira, Rodrigo Grassi-Oliveira, Pedro Eugenio Mazzucchi Santana Ferreira

Original languageEnglish
Article number111232
Pages (from-to)111232
JournalPsychiatry Research. Neuroimaging
Volume310
DOIs
Published30 Apr 2021

Bibliographical note

Funding Information: This study was supported by National Council for Scientific and Technological Development (CNPq) (project No. 402771/2010–9 ). Publisher Copyright: © 2020 Copyright: Copyright 2021 Elsevier B.V., All rights reserved.

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Abstract

Crack-cocaine offers a higher risk of abuse than intranasal and intravenous use of cocaine. Yet, current treatments remain disappointing and our understanding of the mechanism of crack-cocaine neurotoxicity is still incomplete. Magnetic resonance images studies on brain changes of crack-cocaine addicts show divergent data. The present study investigated gray matter (GM) abnormalities in crack-cocaine dependents (n = 18) compared to healthy controls (n = 17). MRI data was analysed using FreeSurfer and voxel-based morphometry (VBM). FreeSurfer analysis showed that CD had decreased cortical thickness (CT) in the left inferior temporal cortex (lTC), left orbitofrontal cortex (lOFC) and left rostro frontal cortex (lRFC), enlargement in left inferior lateral ventricle, and smaller GM volume in right hippocampus and right ventral diencephalon. VBM analysis showed that CD had significantly decreased GM volume in left Putamen and left nucleus accumbens. Furthermore, we found a negative correlation between duration of crack-cocaine use and lTC CT. These results provide compelling evidence for GM abnormalities in CD and also suggest that duration of crack-cocaine use may be associated with CT alterations.

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