Methods Immunohistochemical SP method was used to detect the eNOS and iNOS gene expression in the tissues of 24 cases of choriocarci-noma and 22 cases of normal chorion of early pregnancy.

• 方法 用免疫组化SP法，对24例绒毛膜癌和22例早孕正常绒毛组织中内皮型一氧化氮合酶及诱导型一氧化氮合酶进行检测。