Neuroinflammation drives anxiety and depression in relapsing-remitting multiple sclerosis.

Abstract:

OBJECTIVE:To explore the inflammatory processes in the pathogenesis of psychiatric symptoms and the prognostic value of psychiatric comorbidities in multiple sclerosis (MS). METHODS:Four hundred five patients with relapsing-remitting (RR) MS underwent psychiatric evaluation by means of Beck Depression Inventory II (BDI-II) and State/Trait Anxiety Inventory (STAI-Y). The inflammatory activity level was assessed by MRI. In a subset of 111 treatment-naive patients, CSF levels of proinflammatory cytokines were determined. Correlation and regression analyses were performed to determine associations between variables. RESULTS:Relapsing patients demonstrated greater values of STAI-state and BDI-II compared with remitting patients but comparable trait-anxiety scores. There were no significant differences in psychometric parameters between relapsing and asymptomatic MRI-active patients, highlighting the effect of subclinical inflammation on mood disturbances. A significant reduction of STAI-state and BDI-II scores was recorded, along with the subsiding of neuroinflammation. Interleukin-2 CSF levels were found to correlate with STAI-state, while tumor necrosis factor-α and interleukin-1β correlated with BDI-II. Because emotional disorders were associated with subclinical inflammation, variations of the psychometric profile were able to detect subclinical reactivation earlier. In line with this, high STAI-state values considerably predicted the possibility of disease reactivation. CONCLUSIONS:Mood alterations are induced by intrathecal inflammation, even though not clinically apparent, and are able to predict inflammatory reactivations in RRMS. Inflammation is therefore a biological event, not less important than the traditional psychosocial factors, involved in mood disorders.

journal_name

Neurology

journal_title

Neurology

authors

Rossi S,Studer V,Motta C,Polidoro S,Perugini J,Macchiarulo G,Giovannetti AM,Pareja-Gutierrez L,Calò A,Colonna I,Furlan R,Martino G,Centonze D

doi

10.1212/WNL.0000000000004411

subject

Has Abstract

pub_date

2017-09-26 00:00:00

pages

1338-1347

issue

13

eissn

0028-3878

issn

1526-632X

pii

WNL.0000000000004411

journal_volume

89

pub_type

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