[Correlation of thrombospondin-1 G1678A polymorphism to stroke: a study in Chinese population]

To assess whether thrombospondin-1 (THBS-1) gene G1678A polymorphism is associated with stroke.

Samples of venous blood were collected from 1634 patients with stroke, including cerebral thrombosis, lacunar cerebral infarction, and cerebral hemorrhage confirmed by CT or MRI, and sex-, and age-matched 1171 controls without cerebrovascular diseases. Genotypes were determined with polymerase chain reaction and allele-specific restriction enzyme analysis.

The frequency of the THBS-1 gene 1678 AA genotype (0.503 vs. 0.441) was significantly higher in the cerebral thrombosis group than in the controls (P = 0.008). The frequency of the G allele (0.299 vs. 0.339) was significantly lower in the cerebral thrombosis group than in the controls (P = 0.009). No significant difference was seen in THBS-1 gene 1678 AA polymorphism either between the lacunar cerebral infarction group and the control group or between the cerebral hemorrhage group and the control group (all P > 0.05). Multiple logistic regression analysis showed that the AA genotype of THBS-1 gene G1678A carriers had a higher risk of cerebral thrombosis (OR: 1.4; 95% CI 1.083 - 1.693; P = 0.008) after adjustment for age, sex, SBP, DBP, BMI, smoking, TC, TG, HDL-C, LDL-C and Glu.

AA genotypes in THBS-1 gene G1678A polymorphism may be a genetic risk factor of cerebral thrombosis in Chinese population.