Abstract
Since its initial isolation in 1973 and characterization as an inhibitor of pituitary growth hormone (GH) secretion, the observed biological actions of the tetradecapeptide, somatostatin (SRIF-14) have rapidly proliferated.to include a number of non-pituitary activities such as inhibition gastrointestinal endocrine and exocrine secretion, gastrointestinal motility and blood flow, and central nervous system activity (Reichlin, 1983a, 1983b). Several recent lines of evidence also suggest that in addition to having an indirect, systemic effect on growth related process mediated by GH, SRIF-14 may have direct effects on cell proliferation in numerous types of neoplastic tissues (De Feudis and Moreau, 1986; Moreau and De Feudis, 1987 Lamberts et al., 1987 Lamberts, 1988; Parmer, 1989 Lamberts et al., 1991). For example, we initially reported that the in vivo growth of the rat prostate tumor, R-3327, and the in vitro proliferation and in vivo growth of the NCI-H69 human small cell lung carcinoma cell line (SCLC), were inhibited by the potent octapeptide analogue of SRIF-14, BIM-23014 (3-(2naphthyl)-D-Ala-cyclo[Cys-Try-D-Trp-Lys-Val-Cys]-Thr-NH2) (Murphy et al., 1987 Taylor et al., 1988a, 1988b). Further evaluation of this phenomenom showed that the in vivo growth of several other tumor lines and solid tumors (prostate, breast, hepatic, chondrosarcoma, neuroblastoma) was retarded by chronic BIM-23014 administration (Bogden et al., 1988 Bogden at al., 1990a, 1990b). In some cases, the termination of SRIF analogue treatment, resulted in tumor regrowth suggesting that the antitumor activity of SRIF peptides is oncostatic rather than oncolytic in nature.
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© 1993 Plenum Press, New York
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Taylor, J.E. (1993). Identification and Characterization of Somatostatin (SRIF), Gastrin Releasing Peptide (GRP), and Neuromedin B (NMB) Receptors on Established Tumors and Tumor Cell Lines. In: Moody, T.W. (eds) Growth Factors, Peptides and Receptors. GWUMC Department of Biochemistry and Molecular Biology Annual Spring Symposia. Springer, Boston, MA. https://doi.org/10.1007/978-1-4615-2846-3_18
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DOI: https://doi.org/10.1007/978-1-4615-2846-3_18
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