Biomedical subjects
Publications and source records attributed to T F Deuel.
We describe three cases of fresh-water drowning that were complicated by disseminated intravascular coagulation. Close observation for clinical bleeding, laboratory investigation of the coagulation system, and therapy for disseminated intravascular coagulation, when appropriate, seem indicated in patients hospitalized after fresh-water immersion.
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A partial amino acid sequence of human platelet-derived growth factor, the major mitogen in serum for cells of mesenchymal origin, has been determined. A region of 104 contiguous amino acids shows virtual identity with the predicted sequence of p28sis, the putative transforming protein of simian sarcoma virus (SSV). This similarity suggests a mechanism for transformation by SSV and other agents, involving expression of growth factors.
Human platelet-derived growth factor (PDGF) is a potent mitogenic polypeptide which is believed to be a heterodimer of A- and B-chains stabilized by interchain disulphide bonds. The B-chain of PDGF is encoded by the c-sis gene, the normal cellular homologue of the transforming gene of the simian sarcoma virus (SSV). cDNA clones of the B-chain from both normal and transformed cells have mutually consistent DNA sequences. Recently, an A-chain cDNA clone (D-1) was isolated from a transformed human glial cell cDNA library. We report the complete sequence of an A-chain cDNA clone (BT-1) isolated from a normal human umbilical vein endothelial (HUVE) cell cDNA library. BT-1 differs from the sequence of the D-1 clone by a 69 base pair deletion containing the predicted carboxy terminus of the protein. The mRNA levels of the A- and B-chains of PDGF in HUVE cells were analysed and shown to respond differently to the endothelial cell growth factor (ECGF).