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Endothelial cell growth factor (ECGF), an anionic polypeptide mitogen, binds to immobilized heparin. The interaction between the acidic polypeptide and the anionic carbohydrate suggests a mechanism that is independent of ion exchange. Monoclonal antibodies to purified bovine ECGF inhibited the biological activity of ECGF in crude preparations of bovine(More)
It has been suggested that products of the major histocompatibility complex, the MHC, of vertebrates function in many processes of recognition and ligand binding at the cell surface. Here we show that binding of polyclonal and monoclonal antibodies against human MHC antigens, HLA, reduced the binding of epidermal growth factor (EGF) to its membrane(More)
Transforming growth factor-alpha (TGF-alpha) and epidermal growth factor (EGF) are structurally related peptides. Purified human TGF-alpha produced in Escherichia coli and pure natural mouse EGF were compared for their ability to bind to target cells in vitro and to promote angiogenesis in the hamster cheek pouch bioassay. Both polypeptides were found to(More)
Vaccinia virus encodes VGF, an early protein of relative molecular mass 19,000 (19K) which, from amino-acid residues 45 to 85, is homologous in 19 residues to epidermal growth factor (EGF), and transforming growth factor-alpha (TGF-alpha). The conserved sequence includes a region of high homology (6 out of 10 amino acids) from residues 71 to 80,(More)
Cellular growth control and differentiation have been shown to be dependent on both cell-cell and cell-substrate contacts. Interactions of cells with extracellular material are critical events during embryonic development and maintenance of tissue function. Plasma membrane receptors have been described for components of the extracellular matrix such as(More)
The tumor inhibitory factor-2 from the conditioned medium of the human rhabdomyosarcoma cell line A673 was purified and sequenced. The 19 N-terminal amino acid residues were identical to those of human interleukin 1 (IL-1), corresponding to the residues 119-137 of the IL-1 alpha precursor. The purified material had an apparent molecular weight similar to(More)
Bovine brain, hypothalamus, pituitary, and retina contain potent anionic polypeptide mitogens for endothelial cells. Immunological assays using murine monoclonal antibodies against bovine endothelial cell growth factor (ECGF) and radioreceptor assays using [1251]ECGF were performed to determine the cross-reactivity of ECGF with bovine acidic pl(More)
Cyanogen bromide-cleaved epidermal growth factor (CNBr-EGF) binds to EGF receptors with reduced affinity compared to the native hormone but fails to induce DNA synthesis. However, at similar receptor occupancy, CNBr-EGF is as potent as EGF in activating early cell responses to the hormone. The phosphorylation of membrane proteins, the stimulation of(More)
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