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Tyrosine kinase receptor transactivation associated to G protein-coupled receptors

Vanessa Almendro1, Susana García-Recio, Pedro Gascón

  • 1Institut d'Investigacions Biomèdiques Agustí Pi y Sunyer, Laboratory of Molecular and Translational Oncology (ICMHO), University of Barcelona, Casanova 143, 08036 Barcelona, Spain. almendro@clinic.ub.es

Current Drug Targets
|May 11, 2010
PubMed

Insights

G protein-coupled receptors (GPCRs) and tyrosine kinase receptors (TKRs) interact, influencing cancer progression and therapy resistance. Dual inhibition of GPCRs and TKRs offers a promising strategy for cancer treatment.

Area of Science:

  • Molecular Biology
  • Cellular Signaling
  • Oncology

Background:

  • G protein-coupled receptors (GPCRs) are key signal transducers in physiological processes, including cell growth and differentiation.
  • GPCRs can activate MAPK pathways and transactivate tyrosine kinase receptors (TKRs) like EGFR and HER2, impacting cell proliferation.
  • Dysregulated crosstalk between GPCRs and TKRs contributes to cancer development, progression, metastasis, and resistance to TKR-targeted therapies.

Purpose of the Study:

  • To explore the intricate mechanisms of crosstalk between GPCRs and TKRs.
  • To understand how this interaction influences cancer biology and therapeutic outcomes.
  • To highlight the potential of dual inhibition strategies for cancer treatment.

Main Methods:

  • Review of existing literature on GPCR-TKR signaling pathways.
  • Analysis of molecular mechanisms underlying receptor transactivation, including c-Src involvement.
  • Examination of the implications for cancer cell transformation and drug resistance.

Main Results:

  • GPCRs can induce TKR activation, contributing to uncontrolled cell proliferation and tumor growth.
  • c-Src activation by GPCRs can lead to TKR phosphorylation and activation, bypassing normal regulatory mechanisms.
  • This crosstalk mechanism is implicated in acquired resistance to TKR inhibitors.

Conclusions:

  • The interplay between GPCRs and TKRs is a critical factor in cancer pathogenesis and treatment failure.
  • Targeting both GPCRs and TKRs simultaneously presents a potential therapeutic avenue for overcoming resistance and improving cancer treatment efficacy.
  • Further research into these interconnected pathways can guide the development of novel anti-cancer strategies.

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