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Depression in small-vessel disease relates to white matter ultrastructural damage, not disability

OBJECTIVE: To determine whether cerebral small-vessel disease (SVD) is a specific risk factor for depression, whether any association is mediated via white matter damage, and to study the role of depressive symptoms and disability on quality of life (QoL) in this patient group. METHODS: Using path a...

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Autores principales: Brookes, Rebecca L., Herbert, Vanessa, Lawrence, Andrew J., Morris, Robin G., Markus, Hugh S.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Lippincott Williams & Wilkins 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4206159/
https://www.ncbi.nlm.nih.gov/pubmed/25230999
http://dx.doi.org/10.1212/WNL.0000000000000882
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author Brookes, Rebecca L.
Herbert, Vanessa
Lawrence, Andrew J.
Morris, Robin G.
Markus, Hugh S.
author_facet Brookes, Rebecca L.
Herbert, Vanessa
Lawrence, Andrew J.
Morris, Robin G.
Markus, Hugh S.
author_sort Brookes, Rebecca L.
collection PubMed
description OBJECTIVE: To determine whether cerebral small-vessel disease (SVD) is a specific risk factor for depression, whether any association is mediated via white matter damage, and to study the role of depressive symptoms and disability on quality of life (QoL) in this patient group. METHODS: Using path analyses in cross-sectional data, we modeled the relationships among depression, disability, and QoL in patients with SVD presenting with radiologically confirmed lacunar stroke (n = 100), and replicated results in a second SVD cohort (n = 100). We then compared the same model in a non-SVD stroke cohort (n = 50) and healthy older adults (n = 203). In a further study, to determine the role of white matter damage in mediating the association with depression, a subgroup of patients with SVD (n = 101) underwent diffusion tensor imaging (DTI). RESULTS: Reduced QoL was associated with depression in patients with SVD, but this association was not mediated by disability or cognition; very similar results were found in the replication SVD cohort. In contrast, the non-SVD stroke group and the healthy older adult group showed a direct relationship between disability and depression. The DTI study showed that fractional anisotropy, a marker of white matter damage, was related to depressive symptoms in patients with SVD. CONCLUSION: These results suggest that in stroke patients without SVD, disability is an important causal factor for depression, whereas in SVD stroke, other factors specific to this stroke subtype have a causal role. White matter damage detected on DTI is one factor that mediates the association between SVD and depression.
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spelling pubmed-42061592014-10-30 Depression in small-vessel disease relates to white matter ultrastructural damage, not disability Brookes, Rebecca L. Herbert, Vanessa Lawrence, Andrew J. Morris, Robin G. Markus, Hugh S. Neurology Article OBJECTIVE: To determine whether cerebral small-vessel disease (SVD) is a specific risk factor for depression, whether any association is mediated via white matter damage, and to study the role of depressive symptoms and disability on quality of life (QoL) in this patient group. METHODS: Using path analyses in cross-sectional data, we modeled the relationships among depression, disability, and QoL in patients with SVD presenting with radiologically confirmed lacunar stroke (n = 100), and replicated results in a second SVD cohort (n = 100). We then compared the same model in a non-SVD stroke cohort (n = 50) and healthy older adults (n = 203). In a further study, to determine the role of white matter damage in mediating the association with depression, a subgroup of patients with SVD (n = 101) underwent diffusion tensor imaging (DTI). RESULTS: Reduced QoL was associated with depression in patients with SVD, but this association was not mediated by disability or cognition; very similar results were found in the replication SVD cohort. In contrast, the non-SVD stroke group and the healthy older adult group showed a direct relationship between disability and depression. The DTI study showed that fractional anisotropy, a marker of white matter damage, was related to depressive symptoms in patients with SVD. CONCLUSION: These results suggest that in stroke patients without SVD, disability is an important causal factor for depression, whereas in SVD stroke, other factors specific to this stroke subtype have a causal role. White matter damage detected on DTI is one factor that mediates the association between SVD and depression. Lippincott Williams & Wilkins 2014-10-14 /pmc/articles/PMC4206159/ /pubmed/25230999 http://dx.doi.org/10.1212/WNL.0000000000000882 Text en © 2014 American Academy of Neurology This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Article
Brookes, Rebecca L.
Herbert, Vanessa
Lawrence, Andrew J.
Morris, Robin G.
Markus, Hugh S.
Depression in small-vessel disease relates to white matter ultrastructural damage, not disability
title Depression in small-vessel disease relates to white matter ultrastructural damage, not disability
title_full Depression in small-vessel disease relates to white matter ultrastructural damage, not disability
title_fullStr Depression in small-vessel disease relates to white matter ultrastructural damage, not disability
title_full_unstemmed Depression in small-vessel disease relates to white matter ultrastructural damage, not disability
title_short Depression in small-vessel disease relates to white matter ultrastructural damage, not disability
title_sort depression in small-vessel disease relates to white matter ultrastructural damage, not disability
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4206159/
https://www.ncbi.nlm.nih.gov/pubmed/25230999
http://dx.doi.org/10.1212/WNL.0000000000000882
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