Published in:
01-07-2015 | Original Paper
Streptococcal infection and immune response in children with Tourette’s syndrome
Authors:
Erzhen Li, Yiyan Ruan, Qian Chen, Xiaodai Cui, Lingyun Lv, Ping Zheng, Liwen Wang
Published in:
Child's Nervous System
|
Issue 7/2015
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Abstract
Background
Streptococcal infection and basal ganglia inflammation are hypothesized to be involved in Tourette’s syndrome (TS). There is a need for effective therapies for managing TS. We studied streptococcal infection and immunity in TS following immunomodulator (pidotimod) therapy.
Methods
Blood samples from 58 patients with TS and 128 age-matched healthy controls enabled measurement of antistreptolysin O (ASO), T cells, natural killer (NK) cells, interleukin-6 (IL-6) and interleukin-8 (IL-8), and tumor necrosis factor-α (TNF-α). Forty-four patients with abnormal T cell numbers were divided into two groups and treated with pidotimod granules (pidotimod group, n = 20) or pidotimod plus dopaminergic receptor antagonists (combination group, n = 24). Yale Global Tic Severity Scale (YGTSS) scores and immunologic indices were assessed after treatment.
Results
An ASO >1:200 was found in 22.4 % of children with TS, 7.5 % of controls, and 38.9 % of children with both TS and attention deficit hyperactivity disorder (ADHD) compared to 15.0 % of children with TS alone (P < 0.05). Children with TS showed decreased CD3+ and CD4+ T cells, CD4+/CD8+ ratio, IL-6 and IL-8, increased NKC and TNF-α (P < 0.05) as compared to controls. ASO-positive children with TS had lower CD4+ T cells as compared to ASO-negative children with TS, and lower IL-6 and IL-8 levels as compared to controls (P < 0.05). After 8 weeks of pidotimod treatment, IL-8 was increased compared to either tiapride hydrochloride or haloperidol and pidotimod (P < 0.05).
Conclusions
Streptococcal infection in TS patients is associated with immune and cytokine dysfunction, which can be potentially managed with immunomodulator therapy.