Effect of aprotinin on growth of 3-methylcholanthrene-induced squamous cell-carcinoma in mice.

The effect of aprotinin (Trasylol), a broad-spectrum inhibitor of proteinase, was studied on the growth of murine squamous cell carcinoma induced by 3-methylcholanthrene. In this tumor system, the administration of aprotinin was therapeutically effective. Histologically, aprotinin-treated tumor showed a significant hyperkeratosis.