Τόμος 5 (1991) – Τεύχος 1 – Άρθρο 2 – Επιθεώρηση Κλινικής Φαρμακολογίας και Φαρμακοκινητικής-Διεθνής Έκδοση – Volume 5 (1991) – Issue 1 – Article 2 – Epitheorese Klinikes Farmakologias και Farmakokinetikes-International Edition

Title Growth factors from human platelets: a composite group of cell-regulatory peptides
Authors Dimitris Stathakos, Dimitris Kletsas and Stelios Psarras

Laboratory for Enzyme Research, Institute of Biology, National Center for Scientific Research “Demokritos”, Athens 15310, Greece

Citation Stathakos, D., Kletsas, D., Psarras, S.: Growth factors from human platelets: a composite group of cell-regulatory peptides, Epitheorese Klin. Farmakol. Farmakokinet. 5(1): 12-38 (1991)
Publication Date Received for publication: December 20, 1990

Accepted for publication: January 15, 1991

Full Text Language English
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Keywords Human platelets, cell proliferation, growth factors, platelet-derived growth factor (PDGF), transforming growth factor-P (TGF (3), competence-progression.
Other Terms review article
Summary Human blood platelets contain a broad spectrum of potent polypeptide growth factors, which are liberated at sites of tissue injury upon platelet aggregation and secretion; these can be classified as mitogens proper, growth inhibitors, and multifunctional agents, according to their effect on cellular proliferation. This review is focused primarily on the structure and biological action of those most thoroughly studied, i.e. the platelet-derived growth factor (PDGF) and the transforming growth factor-ß (TGF-ß). Furthermore, the mitogens: connective tissue activating peptide (CTAP-M), platelet-derived endothelial cell growth factor (PD-ECGF), platelet-derived endothelial cell mitogen (PDECM), endothelial growth factor (ENDO-GF), melanoma growth factor (MGF), and the growth inhibitors – platelet- derived growth inhibitor (PDGI) and epithelial growth inhibitor (EGI) – are also reviewed. In addition, two platelet derived peptides (EGF-like and IGF-like peptides, respectively) very similar to the epidermal growth factor and the insulin-like growth factors I and II, first isolated from plasma, are briefly discussed. The interaction of platelet-derived and plasma factors and the “competence-progression” model (proposed to explain the transition of Go- arrested 3T3 cells to S phase after exposure to growth factors) are discussed in the light of data obtained from normal human fibroblasts. Moreover, the importance of cell culture conditions, such as cell density, medium composition, presence of other growth factors, type and developmental stage of the cell, as well as homology of the cell system, is also mentioned. It is believed that data from in vitro studies, where these variables have been taken under consideration, should be evaluated together with the conditions prevailing in the tissue, in order to elucidate the interplay of growth factors in the human organism.
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