Insulin-like growth factor binding protein-6 inhibits neuroblastoma cell proliferation and tumour development
| Autor: | Danielle Seurin, Geraldine Bienvenu, Sylvie Babajko, C Lassarre |
|---|---|
| Rok vydání: | 2002 |
| Předmět: |
Insulin-Like Growth Factor Binding Protein 6
Cancer Research medicine.medical_specialty medicine.medical_treatment Mice Nude Biology Mice Neuroblastoma Insulin-like growth factor Insulin-Like Growth Factor II In vivo Internal medicine Tumor Cells Cultured medicine Animals Humans Cell growth Growth factor medicine.disease Endocrinology Oncology Cell culture Female Cell Division Neoplasm Transplantation Ex vivo |
| Zdroj: | European Journal of Cancer. 38:2058-2065 |
| ISSN: | 0959-8049 |
| DOI: | 10.1016/s0959-8049(02)00240-x |
| Popis: | In neuroblastoma cells, survival and proliferation are dependent upon the insulin-like growth factor (IGF) system. IGFs actively participate in cell growth, whereas IGFBP-6, is associated with the arrest of growth. With a view to blocking IGF-II action, we produced recombinant human IGFBP-6 capable of binding IGFs with affinities between 1.23 and 6.36 x 10(9) M(-1). Ex vivo mitogenic activities were tested on two human neuroblastoma cell lines, in which 100 ng/ml IGFBP-6 completely abolished the effects of both endogenous and exogenous IGF-II. In vivo, nude mice previously injected with neuroblastoma cells were submitted to either 15 daily injections of 4-20 microg IGFBP-6 or implantation of mini-pumps diffusing 20-100 microg IGFBP-6 over 2 weeks. The result was an average 18% reduction in the incidence and development of tumours. Delivery of the IGFBP-6 via mini-pumps also delayed tumour appearance by 6-15 days. Our results therefore show the involvement of IGFBP-6 in neuroblastoma cell growth, both ex vivo in terms of proliferation and in vivo in terms of tumour development. |
| Databáze: | OpenAIRE |
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