实验结束后取股静脉和颈静脉，用免疫组化方法观察ET-1表达的变化。
The ET-1 expression levels of femoral vein and jugular vein were studied by immunohistochemical methods after 21 d exposure.
结论：切取半腱肌腱股薄肌腱重建前交叉韧带后肌腱能够再生。
Conclusion The semitendinosus and gracilis tendon could regenerate after harvested for anterior cruciate ligament reconstruction.
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