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[Changes in T helper lymphocytes and their subsets in children with tic disorders].

OBJECTIVE
To explore the changes in T helper lymphocytes and their subsets in children with tic disorders (TD) and their clinical significance.


METHODS
Flow cytometry was used to measure the percentages of T helper lymphocytes and their subsets in the peripheral blood of children with TD and healthy children (controls).


RESULTS
The percentage of T helper lymphocytes was significantly lower in the TD group than in the control group (P<0.001). The abnormal rate of T helper lymphocytes in the TD group was significantly higher than that in the control group (68.7% vs 18.8%; P<0.001). The percentage of T helper lymphocytes was negatively correlated with Yale Global Tic Severity Scale score (r=-0.3945, P<0.001). As for the subsets of T helper lymphocytes, the TD group had a significantly higher percentage of Th1 cells and a significantly lower percentage of Th2 cells compared with the control group (P<0.001).


CONCLUSIONS
The abnormality of T helper lymphocytes and the imbalance of their subsets may be associated with the pathogenesis of TD in children. The percentage of T helper lymphocytes can be used as an indicator for assessing the severity of TD.