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- W2321894689 abstract "Tumor invasion requires the breakdown of the main structural protein, collagen. A series of fourteen epidermoid carcinomas of the larynx and oral cavity produced a collagen dissolving enzyme in vitro as demonstrated by the breakdown of 14 C-labeled collagen. Oral cavity tumors showed greater activity than laryngeal carcinomas while both sites were more active than uninvolved mucosa from the same patients. Tumor associated collagenase activity, in common with previously described collagenases, can only be demonstrated in vitro and requires protein synthesis. Maximum tumor collagenase occurred at 24 hours in vitro and then declined as compared with the maximum collagenase at 72 hours in vitro produced by oral cavity mucosa. The 14 patients in our series were ranked in order of the collagenase activity of their tumors. At 18 months after the diagnosis, four of the six patients with the most active tumors were dead of cancer and one patient was alive with persistent cancer. High collagenase activity may be a factor in the clinical aggressiveness of epidermoid carcinomas of the head and neck." @default.
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- W2321894689 date "1975-03-01" @default.
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- W2321894689 title "Collagenase Activity in Epidermoid Carcinoma of the Oral Cavity and Larynx" @default.
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- W2321894689 doi "https://doi.org/10.1177/000348947508400203" @default.
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