RESUMO
ObjectiveTo investigate the effect of mesenchymal stem cell transplantation on stereotypic behavior and level of dopamine of Tourette syndrome(TS) rats.MethodsWistar rats were randomly divided into three groups namely sham group (microinfused with normal sera),TS group (microinfused with TS sera)group and TS plus MSC transplantation group.Auto-immune TS rat model were established and MSC suspension labeled with BrdU was injected into the striatum of TS rats.DA were measured by high performance liquid chromatography and electrochemical detection.ResultsTS rats with MSC grafts exhibited significantly decreased stereotypic behaviors (7d:117.3 ±8.4,14d:94.8 ±7.9,28 d:78.8 ±7.4)and level of DA in striatum(7 d:(898.2 ± 143.2) ng/g,14d:(812.4 ±92.2)ng/g,28 d:(757.9 ± 82.4)ng/g) at 7,14 and 28 days after transplantation compared to model group( ( 129.3 ± 9.8,116.5 ± 8.5,106.8 ± 6.4 ; ( 1209.3 ± 182.3 ) ng/g,( 1033.5 ± 114.7 ) ng/g,(994.8 ±112.6) ng/g,P＜0.01).DA in plasma of TS rats with MSC grafts also decreased at 7 and 14 days(7 d:(530.2 ±86.2)ng/g vs (690.3±72.7) ng/g;14d:(562.4 ±64.2) ng/g vs (689.4±83.9) ng/g,P＜0.01).ConclusionsTransplantation of MSC could reduce stereotypic behaviors in TS rats and regulate the metabolism of DA.