肿瘤发病机制的研究一直是人们关注的焦点,随着相关研究的不断深入,研究人员发现血清和组织内蛋白酶抑制剂表达量的变化与某些肿瘤细胞向外浸润与转移有着非常密切的关系。半胱氨酸蛋白酶抑制剂C(cystatin C.cys C)是一种小分子蛋白质,作为一种蛋白酶抑制剂可以抑制包括半胱氨酸蛋白酶在内的多种蛋白水解酶的 Researches on tumor pathogenesis have been the focus of attention. With the deepening of relevant research, the researchers found that the change of protease inhibitor expression in serum and tissue is closely related to the outward invasion and metastasis of some tumor cells. Cystatin C. cys C is a small molecule protein that acts as a protease inhibitor that inhibits many proteolytic enzymes, including cysteine ​​proteases