Abstract
The first report detailing the chemical structure of somatostatin (somatotropin release inhibiting factor [SRIF]) was published 20 years ago by Paul Brazeau and collaborators working in Roger Guillemin’s laboratory (1). Brazeau, then a postdoctoral fellow, had been assigned the task of isolating growth hormone (GH) releasing factor from extracts of sheep hypothalami, using as his bioassay the release of GH from rat pituitaries incubated in vitro. However, the dominant GH regulatory substance in the extracts was an inhibitor, and the group undertook to isolate somatostatin instead. In retrospect, there was adequate reason to suspect the existence of a GH release inhibitory factor: Krulich, Dhariwal, and McCann had previously reported that rat hypothalamic extracts had stimulatory or inhibitory effects on GH secretion (depending on the region extracted) and had postulated the existence of a dual control system of GH regulation (2), at that time a novel concept of hypothalamic-pituitary control.
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Reichlin, S. (1995). Role of Somatostatin in the Regulation of Growth Hormone Secretion. In: Blackman, M.R., Roth, J., Harman, S.M., Shapiro, J.R. (eds) GHRH, GH, and IGF-I. Serono Symposia USA. Springer, New York, NY. https://doi.org/10.1007/978-1-4612-0807-5_2
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DOI: https://doi.org/10.1007/978-1-4612-0807-5_2
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