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Central nervous system involvement in rheumatoid arthritis: possible role of chronic inflammation and tnf blocker therapy.

Abstract：

:Rheumatoid arthritis (RA) is a chronic disease, the etiology of which has yet to be clarified, which causes activation of proinflammatory pathways that bring about joint and systemic inflammation. Although peripheral nervous system anomalies are observed widely in RA, very few case reports on changes in the central nervous system (CNS) have been published. In recent years, the pathophysiology of CNS involvement that can occur in RA has attracted a great deal of attention. Emphasis has focused on the possibility that CNS involvement occurs due to blood-brain barrier (BBB) damage associated with chronic inflammation. The present study was performed to investigate the possible effects of BBB dysfunction and tumor necrosis factor (TNF) blocker therapy on BBB function, which may cause CNS damage in patients with RA. 58 RA patients [47 (81.0%) females, 11 (19.0%) males] and 34 healthy controls [24 (70.6%) females, 10 (29.4%) males] were included in the study. All RA patients were on synthetic DMARD therapy at the beginning. Thirty patients continued DMARD therapy, and 28 patients with high disease activity were started on TNF blocker therapy. All demographic characteristics of the patients were recorded. Disease activity was evaluated using the Disease Activity Score 28-joint count C reactive protein. The Mini-Mental State Examination was used to evaluate cognitive function, and the Fazekas scale was used to assess cranial lesions visualized by magnetic resonance imaging (MRI). Patients' peripheral blood S100β, glial fibrillary acidic protein (GFAP), claudin, interleukin (IL)-17, and IL-1β levels were measured at the beginning of the study and after 6 months. Demographic characteristics (including sex, age, and body mass index) were similar in the RA and control groups. S100β and GFAP levels were significantly higher in the patient group than in the control group. In the group that was started on TNF blocker therapy, S100β and GFAP levels were significantly decreased 6 months after commencement of treatment. No difference was observed between the RA and control groups in terms of hyperintense lesions seen on cranial MRI. The S100β levels increased with lesions in the deep white matter seen on cranial MRI in patients with RA. In conclusion, next to decreasing disease activity and joint erosions by suppressing inflammation, anti-TNF therapy in RA can also suppress potential CNS involvement linked to BBB (blood-brain barrier) dysfunction. Further studies with broader participation and longer patient follow-up are needed to reinforce this hypothesis.

journal_name

Acta Neurol Belg

journal_title

Acta neurologica Belgica

authors

Sağ S,Sağ MS,Tekeoğlu I,Kamanlı A,Nas K,Acar BA

doi

10.1007/s13760-017-0879-3

subject

Has Abstract

pub_date

2020-02-01 00:00:00

pages

25-31

issue

eissn

0300-9009

issn

2240-2993

pii

10.1007/s13760-017-0879-3

journal_volume

120

pub_type

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Central nervous system involvement in rheumatoid arthritis: possible role of chronic inflammation and tnf blocker therapy.