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An endothelial cell growth factor from bovine hypothalamus: identification and partial characterization.
Open accessAbstract
Extracts of bovine hypothalamus were found to contain a significant level of mitogenic activity when tested in a Swiss 3T3 cell [3H]dThd incorporation assay and in a human umbilical vein endothelial cell growth assay. The mitogenic activity responsible for 3T3 cell activity was purified and characterized as a fibroblast growth factor (FGF)-like mitogen. Neither the biologically active FGF-like mitogen purified from the hypothalamus extracts nor FGF purified from bovine pituitary glands was mitogenic when added to human endothelial cells in vitro, suggesting the presence of more than one mitogen in the hypothalamic extracts. The 3T3 and endothelial cell biological activities of hypothalamic extracts were both found to be inactivated by trypsin, subtilisin, and heat treatment, but were stable to dialysis. The endothelial cell growth factor activity could be efficiently separated from the FGF activity by gel exclusion chromatography. The endothelial cell mitogen possessed a molecular weight of approximately 75,000, whereas that of FGF was approximately 15,000. The endothelial cell growth factor activity was found to be inactivated with reducing agents whereas the 3T3 cell mitogenic activity was stable after incubation with 2-mercaptoethanol. Significant levels of endothelial cell mitogenic activity were also found in extracts of bovine brain and pituitary glands.
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Metadata
- Authors
- Maciag, T., Cerundolo, J., Ilsley, S., Kelley, P. R., & Forand, R.
- Venue
- Proceedings of the National Academy of Sciences
- Published
- 1979-11
- Volume
- 76
- Issue
- 11
- Pages
- 5674-5678
- ISSN
- 0027-8424 (ISSN-L)
- 1091-6490
- OpenAlex
- W1978094951
- Cited by
- 704
- References
- 0
- FWCI
- 5.28
- Type
- journal article
- Language
- en
- Open access
- green
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