Suramin blocks growth-stimulatory effects of platelet-derived growth factor on malignant fibrous histiocytomas in vitro
| Autor: | Thomas Walz, Åke Wasteson, Sven-Erik Larsson, Avni Abdiu |
|---|---|
| Rok vydání: | 1999 |
| Předmět: |
Cancer Research
Pathology medicine.medical_specialty Platelet-derived growth factor medicine.medical_treatment Suramin Antineoplastic Agents Biology chemistry.chemical_compound Tumor Cells Cultured polycyclic compounds medicine Humans Cytotoxicity Suramin Sodium Platelet-Derived Growth Factor Histiocytoma Benign Fibrous Growth factor Biological activity In vitro Oncology chemistry Tumor progression Cancer research Cell Division Thymidine medicine.drug |
| Zdroj: | Cancer Letters. 146:189-194 |
| ISSN: | 0304-3835 |
| Popis: | The pattern of susceptibility of malignant cells to the cytostatic drug suramin is not fully clarified. Therefore, in the present paper we have assessed the effects of suramin on the growth of eight cell lines derived from human malignant fibrous histiocytomas, by measuring DNA synthesis. The effect of suramin (10-200 microg/ml) on cells either unstimulated, or stimulated with platelet-derived growth factor (PDGF)-AA (10 ng/ml), PDGF-BB (10 ng/ml) or 10% fetal calf serum was studied. Four out of five cell lines unable to thrive without external growth factors showed growth inhibition by suramin. The two cell lines able to grow under serum-free conditions were unaffected by high-dose suramin. The exposure to suramin, at 200 microg/ml, abolished the growth stimulation caused by PDGF-AA and -BB. In contrast, a low dose of suramin (50 microg/ml), with or without PDGF, caused growth-stimulating effects in some cell lines. Our results indicate that high doses of suramin inhibit growth of malignant fibrous histiocytomas in vitro and that suramin exerts its growth-inhibitory effects on cells dependent on external growth factors. Low-dose treatment with suramin, however, may instead promote growth in both serum-dependent and -independent tumor cell lines. |
| Databáze: | OpenAIRE |
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