Transforming growth factor (TGF) activity in human urine: synergism between TGF-beta and urogastrone.


Human urine contains an acid and heat stable peptide with an apparent molecular weight of 8,000-10,000 that, in the presence of urogastrone (EGF), induces the anchorage-independent growth of nontransformed cells in semisolid media. This nonmitogenic growth-modulating activity does not compete with EGF for binding to EGF membrane receptor sites and can be… (More)


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