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AdvancementofMembrane—type1MatrixMetalloproteinaseintheResearchofTumor(Symposium)CaiYang;WuZhiquan(GeneralSurgery,HangzhouFirstHospital,310006;LiverCancerInstitute,ShanghaiMedicalUniversity,200032)肿瘤细胞在侵袭。转移过程中,首先必须从原发灶进人血管,而进出毛细血管的过程可分为粘附、基质降解和运动三个环节。基质降