Proteose peptone enhances production of tissue-type plasminogen activator from human diploid fibroblasts

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Abstract

Proteose peptone markedly enhanced the production of human tissue-type plasminogen activator (t-PA) from confluently cultured cell of human diploid fibroblasts. The cells continued synthesizing and secreting high levels of t-PA under periodic replacement of medium containing proteose peptone for more than one month. The highly increased activity correlated with equally increased levels of t-PA antigen and concomitantly increased levels of t-PA specific mRNA.

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