Involvement of immunologic and biochemical mechanisms in the pathogenesis of Tourette’s syndrome
- 340 Downloads
Tourette’s syndrome is a neurodevelopmental disorder clinically characterized by multiple motor and phonic tics. It is likely that a neurobiological susceptibility to the disorder is established during development by the interaction of genetic, biochemical, immunological, and environmental factors. This study sought to investigate the possible correlation of several immunological and biochemical markers with Tourette’s syndrome. Children with Tourette’s syndrome attending a tertiary pediatric medical center from May 2008 to April 2010, and healthy age-matched control subjects underwent a comprehensive biochemical and immunological work-up. Demographic data were abstracted from the medical records. Findings were compared between the groups and analyzed statistically. Sixty-eight children with Tourette’s syndrome (58 males, 85.3%) and 36 healthy children (25 males, 69.4%) were recruited. Compared with the control group, the Tourette’s syndrome group had significantly higher levels of ferritin (p = 0.01) and hemoglobin (p = 0.02), a lower level of zinc (p = 0.05), and a lower percentage of non-ceruloplasmin copper (p = 0.01). Analysis of the immunological markers revealed no significant between-group differences in IgA, IgM or IgG; however, IgE and IgG-4 levels were significantly higher in the Tourette’s syndrome group (p = 0.04 and p = 0.02, respectively). Children with Tourette’s syndrome have high levels of biochemical indices of oxidative stress and the quantitative immunoglobulins. These findings add to the still-limited knowledge on the pathogenesis of Tourette’s syndrome and may have implications for the development of novel therapeutic modalities.
KeywordsTourette syndrome Oxidative stress Heavy metals metabolism Autoimmunity Immunoglobulins
The authors thank Pearl Lilos of the Department of Statistics, Schneider Children’s Medical Center of Israel, Tel Aviv University, for the statistical analysis of the data.
Conflict of interest
Authors Y. E. Landau, T. Steinberg, and A. Apter declare that they have no conflicts of interest. B. Richmand: the funding for this study was provided by Brian and Linda Richmand, and Scott and Amy Horwitz. J. F. Leckman: support for the past three years: NIH (salary and research funding), Tourette Syndrome Association (research funding), Talecris Biotherapeutics (research funding), Klingenstein Third Generation Foundation (medical student fellowship program), John Wiley and Sons (book royalties), McGraw Hill (book royalties), Oxford University Press (book royalties).
- Hamilton CS, Garvey MA, Swedo SE (2001) Therapeutic implications of immunology for tics and obsessive–compulsive disorder. In: Cohen DJ, Jankovic J, Goetz CG (eds) Advances in neurology. Tourette syndrome, vol 85. Lippincott Williams and Wilkins, Philadelphia, pp 311–318Google Scholar
- Kushner HI (1999a) A cursing brain? The histories of Tourette syndrome. Harvard University Press, CambridgeGoogle Scholar
- Kushner HI (1999b) From Gilles de la Tourette’s disease to Tourette syndrome: a history. CNS Spectr 4:24–35Google Scholar
- Leckman JF, Cohen DJ, Goetz CG, Jankovic J (2001) Tourette syndrome: pieces of the puzzle. In: Cohen DJ, Jankovic J, Goetz CG (eds) Advances in neurology. Tourette syndrome, vol 85. Lippincott Williams and Wilkins, Philadelphia, pp 369–390Google Scholar