Cited by 151Bipolar Disorder and TreatmentTryptophan and brain disordersAdvanced Neuroimaging Techniques and Applications

Inflammatory cytokines influence measures of white matter integrity in Bipolar Disorder

Benedetti, Francesco, Poletti, Sara, Hoogenboezem, Thomas A., Mazza, Elena, Ambrée, Oliver, de Wit, Harm, Wijkhuijs, Annemarie J.M., Locatelli, Clara +4 more·2016·Journal of Affective Disorders

Abstract

Background Bipolar Disorder (BD) is associated with elevated biomarkers of cell-mediated immune activation and inflammation and with signs of widespread disruption of white matter (WM) integrity in adult life. Consistent findings in animal models link WM damage in inflammatory diseases of the brain and serum levels of cytokines.Methods With an exploratory approach, we tested the effects of 22 serum analytes, including pro- and anti-inflammatory cytokines and neurotrophic/hematopoietic factors, on DTI measures of WM microstructure in a sample of 31 patients with a major depressive episode in course of BD. We used whole brain tract-based spatial statistics in the WM skeleton with threshold-free cluster enhancement of DTI measures of WM microstructure: axial (AD), radial (RD), and mean diffusivity (MD), and fractional anisotropy (FA).Results The inflammation-related cytokines TNF-α, IL-8, IFN-γ and IL-10, and the growth factors IGFBP2 and PDGF-BB, shared the same significant associations with lower FA, and higher MD and RD, in large overlapping networks of WM fibers mostly located in the anterior part of the brain and including corpus callosum, cingulum, superior and inferior longitudinal fasciculi, inferior fronto-occipital fasciculi, uncinate, forceps, corona radiata, thalamic radiation, internal capsule.Conclusions Higher RD is thought to signify increased space between fibers, suggesting demyelination or dysmyelination. The pattern of higher RD and MD with lower FA suggests that inflammation-related cytokine and growth factor levels inversely associate with integrity of myelin sheaths. The activated inflammatory response system might contribute to BD pathophysiology by hampering structural connectivity in critical cortico-limbic networks.

Integrity signals

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Crossref · 10.1016/j.jad.2016.05.047

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Authors
Benedetti, F., Poletti, S., Hoogenboezem, T. A., Mazza, E., Ambrée, O., de Wit, H., Wijkhuijs, A. J. M., Locatelli, C., Bollettini, I., Colombo, C., Arolt, V., & Drexhage, H. A.
Affiliations
  • Vita-Salute San Raffaele University (IT)
  • Erasmus MC (NL)
  • University of Münster (DE)
Corresponding author
Benedetti, Francesco
Venue
Journal of Affective Disorders
Publisher
Elsevier BV
Published
2016-09
Volume
202
Pages
1-9
ISSN
0165-0327 (ISSN-L)
OpenAlex
W2254802873
Cited by
151
References
102
Citations by year
2026: 7 · 2025: 15 · 2024: 21 · 2023: 15 · 2022: 18 · 2021: 19 · 2020: 16 · 2019: 18 · 2018: 9 · 2017: 7 · 2016: 6
FWCI
11.85
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Affective Disorders (publishedVersion)
  • PubMed (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (publishedVersion)
  • EUR Research Repository (Erasmus University Rotterdam) (submittedVersion)
  • Archivio Istituzionale della Ricerca - Università Vita-Salute San Raffaele (submittedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Bipolar Disorder and Treatment
  • Life Sciences › Neuroscience › Biological Psychiatry › Tryptophan and brain disorders
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
bipolar disorder, inflammatory cytokines, white matter integrity, major depressive episode, diffusion tensor imaging, fractional anisotropy, radial diffusivity, mean diffusivity, TNF-α, interleukin-8, interferon-gamma, IL-10, IGFBP-2, PDGF-BB, demyelination, myelin sheath, structural connectivity, cortico-limbic network, serum biomarkers, neuroinflammation
MeSH terms
Adult, Bipolar Disorder, Major Depressive Disorder, Depressive Disorder, Major, Female, Humans, Male, Middle Aged, Cytokines, Anisotropy, Internal Capsule, Diffusion Tensor Imaging, White Matter

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