New Treatments Help Children With Obsessive-Compulsive Disorder
Sept. 30, 1999 (Minneapolis) -- Researchers at the National Institute of Mental Health (NIMH) have found that some children whose symptoms of obsessive-compulsive disorder (OCD) and tic disorders were worsened by a common strep infection can be successfully treated with one of two procedures used for disorders of the immune system. The findings appear in the Oct. 2 issue of The Lancet.
OCD and tic disorders affect 1-2% of school-aged children and adolescents. Researchers know from previous studies that in a small number of children suffering from the obsessional thoughts and compulsive behaviors typical of these disorders, symptoms suddenly get worse following a strep infection such as strep throat or a skin infection due to this bacteria.
The two procedures -- called plasma exchange and intravenous immunoglobulin -- were both found by the researchers to lead to a significant improvement in these children. Plasma exchange involves removing some blood from the body and then transferring the blood back to the body after removal of substances that activate the immune system. Intravenous immunoglobulin is given through a vein and is a medication consisting of antibodies to help boost the body's immune system.
The thought behind the procedures, which are used for multiple medical conditions, is removing from the body what is causing the exaggerated response to the strep infection, and then giving back to the body what it needs to fight the infection appropriately.
"A few children [in the study group] were able to discontinue all psychotropic (behavior altering) medications after treatments," lead researcher Susan Swedo, MD, tells WebMD. Swedo, who is chief of pediatrics and developmental neuropsychiatry at the NIMH in Bethesda, Md., emphasizes that while all patients in the study already had OCD, tic disorders, or Tourette syndrome, most children with strep infections are not at risk for developing these disorders. "In fact, strep infections are very common, and strep-triggered neuropsychiatric disorders are quite rare," she says.
The researchers studied 30 children, aged 9-15, with severe, infection-induced worsening of OCD or tic disorders, including Tourette syndrome, in their study. Following complete medical evaluation, the children were randomly assigned to receive one of three treatments: plasma exchange, intravenous immunoglobulin, or placebo (saline solution). The active drugs were chosen because of their safety and effectiveness in a variety of childhood and adult diseases related to the immune system, according to the researchers.