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Dual role of GRK5 in cancer development and progression
J Gambardella1, A Franco2, C Del Giudice2
1Department of Medicine and Surgery -University of Salerno, Italy;
Abstract:
GRK5 is a multifunctional protein that is able to move within the cell in response to various stimuli to regulate key intracellular signaling from receptor activation, on plasmamembrane, to gene transcription, in the nucleus. Thus, GRK5 is involved in the development and progression of several pathological conditions including cancer. Several reports underline the involvement of GRK5 in the regulation of tumor growth even if they appear controversial. Indeed, depending on its subcellular localization and on the type of cancer, GRK5 is able to both inhibit cancer progression, through the desensitization of GPCR and non GPCR-receptors (TSH, PGE2R, PDGFR), and induce tumor growth, acting on non-receptor substrates (p53, AUKA and NPM1). All these findings suggest that targeting GRK5 could be an useful anti-cancer strategy, for specific tumor types. In this review, we will discuss the different effects of this kinase in the induction and progression of tumorigenesis, the molecular mechanisms by which GRK5 exerts its effects, and the potential therapeutic strategies to modulate them.
Insights
G protein-coupled receptor kinase 5 (GRK5) plays a dual role in cancer, potentially inhibiting or promoting tumor growth. Targeting GRK5 offers a promising anti-cancer strategy for specific tumor types.
Area of Science:
- Molecular Biology
- Cellular Signaling
- Oncology
Background:
- GRK5 is a multifunctional protein involved in intracellular signaling pathways.
- GRK5's subcellular localization influences its role in various cellular processes.
- GRK5 has been implicated in the development and progression of cancer.
Purpose of the Study:
- To review the diverse roles of GRK5 in tumorigenesis.
- To elucidate the molecular mechanisms underlying GRK5's pro- and anti-tumorigenic effects.
- To explore therapeutic strategies targeting GRK5 in cancer treatment.
Main Methods:
- Review of existing scientific literature on GRK5 and cancer.
- Analysis of studies detailing GRK5's interactions with receptors and non-receptor substrates.
- Examination of evidence linking GRK5's subcellular localization to its function.
Main Results:
- GRK5 exhibits context-dependent effects on tumor growth, acting as both an inhibitor and promoter.
- Inhibition of cancer progression is mediated by desensitization of G protein-coupled receptors (GPCRs) and non-GPCRs.
- Tumor growth induction involves GRK5's action on non-receptor substrates like p53, AUKA, and NPM1.
Conclusions:
- GRK5's dual role in cancer necessitates a nuanced understanding of its function.
- Targeting GRK5 presents a potential therapeutic avenue for specific cancer types.
- Further research is needed to fully exploit GRK5 as an anti-cancer target.
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