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The secretion of plasminogen activator by explants of 92 human malignant tumors was studied in short-term organ culture. Where possible, adjacent normal tissue of the presumed origin of the tumors was also studied. The study included adenocarcinomas of the lung, colon, prostate, breast, and stomach and different types of sarcomas. In addition to the(More)
Studies relating intellectual performance to birth order report conflicting results, some finding intellectual scores to increase, others to decrease with birth order. In contrast, the relationship between intellectual performance and family size is stable and consistently replicable. Why do these two highly related variables generate such divergent(More)
The question whether urokinase is expressed in human colon cancer by the cancer cells themselves or by surrounding stromal elements such as fibroblasts, macrophages, and leukocytes, which transfer the activator to the receptors of the cancer cells, has been a controversial one. In the present study 12 cases of colorectal cancer were investigated by(More)
Metastatic malignant melanomas from 16 patients, extracted with Triton X-100, were analyzed for plasminogen activator activity by azocaseinolysis . In 6 cases tumor explants were set up also in short-term organ culture, and the rate of plasminogen activator secretion into the culture medium was determined. Both the extractable activator content [8.66 +/-(More)
The topics reviewed in this article include transcriptional regulation of plasminogen activators, their relevance to differentiation, tumor progression, and to the metastatic spread of cancer. Recent information on the nature of cellular plasminogen activator receptors is also discussed. Particular attention is paid to the increasing number of observations(More)
PURPOSE Pancreatic cancer remains a devastating problem with the majority of patients succumbing to death from this disease. A hallmark of pancreatic cancer is the loss of basement membrane that may be attributed to the action of urinary plasminogen activator (uPA) and matrix metalloproteinase-9 (MMP-9). These enzymes are also implicated in angiogenesis.(More)