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Human fibrosarcoma cells derived from a patient with multiple metastases extensively degrade artificial basement membranes (BM) and secrete interstitial type of collagenase, a proteolytic enzyme responsible for degradation of type I collagen. Exposure of invasive cell line to TGF beta abrogates destruction of BM.TGF beta reduces collagenase activity and(More)
Enhanced humoral, stimulating activities (HSAs) of post-cyclophosphamide (CY) sera and their purified fractions, acting on mitogen activated T-lymphocytes, were detected in Wistar rats after treatment by high single doses of the aplasia producing alkylating cytostatic drug CY. These activities, monitored in vitro, were partially purified from post-CY sera,(More)
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