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Somatostatin and Somatostatin Receptors in Tumour Biology

Ujendra Kumar1

  • 1Faculty of Pharmaceutical Sciences, The University of British Columbia, Vancouver, BC V6T 1Z3, Canada.

International Journal of Molecular Sciences
|January 11, 2024
PubMed

Insights

Somatostatin (SST) inhibits tumor growth directly via somatostatin receptors (SSTRs) and indirectly by regulating growth factors. New SST analogues offer promising therapeutic strategies for various cancers.

Area of Science:

  • Endocrinology
  • Oncology
  • Molecular Biology

Background:

  • Somatostatin (SST), a peptide hormone, is widely expressed and known for inhibiting growth hormone release.
  • SST exhibits antiproliferative effects on tumor cells, presenting a potential therapeutic avenue for various cancers.
  • Tumor cells express somatostatin receptor subtypes (SSTR1-5), often multiple subtypes per cell.

Purpose of the Study:

  • To review the direct and indirect antiproliferative mechanisms of Somatostatin (SST) in tumors.
  • To highlight the role of somatostatin receptor subtypes (SSTRs) in tumor diagnosis and prognosis.
  • To discuss emerging therapeutic strategies involving novel SST analogues and receptor-specific agonists.

Main Methods:

  • Literature review of studies on Somatostatin (SST) and its receptor subtypes (SSTRs) in cancer.
  • Analysis of direct and indirect antiproliferative effects of SST in vitro and in vivo.
  • Evaluation of the diagnostic and prognostic significance of SSTRs in tumors.

Main Results:

  • SST exerts direct antiproliferative effects through SSTR activation and indirect effects via growth factor regulation.
  • SSTRs are frequently overexpressed in various tumors and are critical for tumor progression.
  • The expression patterns of SSTR subtypes can serve as biomarkers for tumor diagnosis and prognosis.

Conclusions:

  • Somatostatin (SST) and its receptor subtypes (SSTRs) play significant roles in tumor biology.
  • Novel SST analogues and targeted agonists targeting SSTRs represent promising therapeutic strategies for cancer treatment.
  • Further research into SSTR signaling pathways could uncover new therapeutic targets for diverse tumor types.
Keywords:
Somatostatin: somatostatin receptorssignalingtumours

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