Proteolytic enzymes in tumor metastasis. II. Collagenase type IV activity in subcellular fractions of cloned tumor cell populations.

Abstract

Collagenase type IV degradation activity was examined in metastatic and nonmetastatic clones of the Lewis lung carcinoma (3LL) and of the T10 sarcoma. Conditioned media prepared from cells of both tumors grown in vitro contained low degradation activities, whereas conditioned media from organ cultures of the same clones grown as solid tumors in animals… (More)

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