Transforming growth factors produced by certain human tumor cells: polypeptides that interact with epidermal growth factor receptors
TLDR
Three different human tumor lines in culture, a rhabdomyosarcoma, a bronchogenic carcinoma and a metastatic melanoma, release proteins (transforming growth factors, TGFs) into the medium that confer the transformed phenotype on untransformed fibroblasts that enable normal anchorage-dependent cells to grow in agar.Abstract:
Three different human tumor lines in culture, a rhabdomyosarcoma, a bronchogenic carcinoma and a metastatic melanoma, release proteins (transforming growth factors, TGFs) into the medium that confer the transformed phenotype on untransformed fibroblasts. These proteins are acid and heat-stable; produce profound morphologic changes in rat and human fibroblasts; and enable normal anchorage-dependent cells to grow in agar. Removal of the transforming protein results in a reversion of cell phenotype. The major activity interacts with epidermal growth factor (EGF) cell membrane receptors. The peptides from these tumor cells are similar in their action to the sarcoma growth factor (SGF) released by murine sarcoma virus-transformed rodent cells. The most anchorage-independent tumor cells released the most TGFs. EGF-related TGFs were not detectable in fluids from cultures of cells with high numbers of free EGF membrane receptors (normal human fibroblasts and human carcinomas).read more
Citations
More filters
Journal ArticleDOI
Isolation of a pluripotent cell line from early mouse embryos cultured in medium conditioned by teratocarcinoma stem cells
TL;DR: In this article, the authors described the establishment directly from normal preimplantation mouse embryos of a cell line that forms teratocarcinomas when injected into mice and demonstrated the pluripotency of these embryonic stem cells by the observation that subclonal cultures, derived from isolated single cells, can differentiate into a wide variety of cell types.
Journal ArticleDOI
Human transforming growth factor-beta complementary DNA sequence and expression in normal and transformed cells.
Rik Derynck,Julie A. Jarrett,Ellson Y. Chen,Dennis H. Eaton,John Richard Bell,Richard K. Assoian,Anita B. Roberts,Michael B. Sporn,David V. Goeddel +8 more
TL;DR: The cDNA sequence indicates that the 112-amino acid monomeric form of the natural TGF-β homodimer is derived proteolytically from a much longer precursor polypeptide which may be secreted.
Journal ArticleDOI
Cloning, sequence and expression of two distinct human interleukin-1 complementary DNAs
Carl J. March,Bruce Mosley,Larsen Alf D,Douglas P. Cerretti,Gary Braedt,Virginia L. Price,Steven Gillis,Christopher S. Henney,Shirley R. Kronheim,Kenneth H. Grabstein,Paul J. Conlon,Thomas P. Hopp,David Cosman +12 more
TL;DR: Two distinct but distantly related complementary DNAs encoding proteins sharing human interleukin-1 (IL-1) activity (termed IL-lα and IL-1β), were isolated from a macrophage cDNA library.
Journal ArticleDOI
Transforming growth factor-beta in human platelets. Identification of a major storage site, purification, and characterization.
TL;DR: The results show that platelets contain a type beta transforming growth factor, which is distinct from platelet-derived growth factor and elicits 50% of its maximal biological response at concentrations less than 5 x 10(-12) M.
Journal ArticleDOI
Autocrine growth factors and cancer.
TL;DR: The ability of cancer cells to produce and to respond to their own growth factors (autocrine secretion) has become a central concept linking oncogene and growth factor research.
References
More filters
Book
Control mechanisms in animal cells : specific growth factors
TL;DR: Reading this book with the PDF control mechanisms in animal cells specific growth factors will let you know more things.