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The Role of Receptor-Ligand Interaction in Somatostatin Signaling Pathways: Implications for Neuroendocrine Tumors

Agnieszka Milewska-Kranc1, Jarosław B Ćwikła2,3, Agnieszka Kolasinska-Ćwikła4

  • 1GENELYTICA Sp. z o.o., Akademicka 48a, 18-400 Łomża, Poland.

Cancers
|January 11, 2024
PubMed

Insights

This review details somatostatin receptors (SSTRs) and their signaling in neuroendocrine tumors (NETs). Understanding these interactions is key for developing targeted therapies for NETs.

Area of Science:

  • Endocrinology
  • Oncology
  • Molecular Biology

Background:

  • Neuroendocrine tumors (NETs) originate from neuroendocrine cells across various organs.
  • Somatostatin and its receptors (SSTR1-SSTR5) are crucial regulators in NET development and physiology.
  • Understanding SSTR-ligand interactions is vital for NET pathogenesis and therapeutic strategies.

Purpose of the Study:

  • To review SSTR characteristics, localization, and expression in various tissues.
  • To analyze somatostatin and analogue binding mechanisms, selectivity, and affinity to SSTRs.
  • To explore the role of SSTR signaling pathways in NET growth, survival, and hormone secretion.

Main Methods:

  • Literature review of SSTR characteristics, expression patterns, and signaling pathways.
  • Analysis of somatostatin and synthetic analogue binding kinetics and selectivity.
  • Examination of intracellular signaling cascades (cAMP, PLC, MAP kinases) upon SSTR activation.

Main Results:

  • SSTRs exhibit diverse tissue localization and expression profiles, influencing physiological functions.
  • Somatostatin and its analogues bind to SSTRs with varying selectivity and affinity.
  • SSTR activation triggers complex intracellular signaling, impacting NET cell growth, differentiation, survival, and hormone secretion.

Conclusions:

  • SSTRs are significant therapeutic targets in NETs.
  • Targeting SSTRs with somatostatin or analogues offers potential for regulating hormone secretion and inhibiting tumor growth.
  • This review enhances understanding of SSTR-ligand interactions and signaling, paving the way for improved NET treatments.
Keywords:
SSTR characteristicshormone secretion regulationintracellular signalingneuroendocrine tumorsreceptor–ligand interactionstherapeutic targetstumor development mechanisms

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