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Updated: Oct 25, 2025

A Robust Discovery Platform for the Identification of Novel Mediators of Melanoma Metastasis
Published on: March 8, 2022
Glutamatergic Signaling a Therapeutic Vulnerability in Melanoma
Kevinn Eddy1,2, Suzie Chen1,2,3,4
1Graduate Program in Cellular and Molecular Pharmacology, School of Graduate Studies, Rutgers University, Piscataway, NJ 08854, USA.
Abstract:
Like other cancers, melanomas are associated with the hyperactivation of two major cell signaling cascades, the MAPK and PI3K/AKT pathways. Both pathways are activated by numerous genes implicated in the development and progression of melanomas such as mutated BRAF, RAS, and NF1. Our lab was the first to identify yet another driver of melanoma, Metabotropic Glutamate Receptor 1 (protein: mGluR1, mouse gene: Grm1, human gene: GRM1), upstream of the MAPK and PI3K/AKT pathways. Binding of glutamate, the natural ligand of mGluR1, activates MAPK and PI3K/AKT pathways and sets in motion the deregulated cellular responses in cell growth, cell survival, and cell metastasis. In this review, we will assess the proposed modes of action that mediate the oncogenic properties of mGluR1 in melanoma and possible application of anti-glutamatergic signaling modulator(s) as therapeutic strategy for the treatment of melanomas.
Insights
Metabotropic Glutamate Receptor 1 (mGluR1) drives melanoma by activating MAPK and PI3K/AKT pathways. Targeting mGluR1 signaling offers a potential new therapeutic strategy for melanoma treatment.
Area of Science:
- Oncology
- Molecular Biology
- Neuroscience
Background:
- Melanoma progression involves hyperactivated MAPK and PI3K/AKT signaling pathways.
- Mutations in BRAF, RAS, and NF1 are known drivers of melanoma.
- Metabotropic Glutamate Receptor 1 (mGluR1) is a newly identified melanoma driver upstream of these pathways.
Purpose of the Study:
- To review the proposed mechanisms of mGluR1's oncogenic activity in melanoma.
- To explore the potential of anti-glutamatergic therapies for melanoma treatment.
Main Methods:
- Literature review of studies on mGluR1 in melanoma.
- Analysis of signaling pathways (MAPK, PI3K/AKT) affected by mGluR1.
- Assessment of therapeutic strategies targeting glutamatergic signaling.
Main Results:
- mGluR1 activation by glutamate triggers MAPK and PI3K/AKT pathways.
- This activation leads to deregulated cell growth, survival, and metastasis in melanoma.
- mGluR1 represents a novel therapeutic target.
Conclusions:
- mGluR1 plays a significant role in melanoma oncogenesis.
- Inhibiting mGluR1 signaling is a promising therapeutic avenue for melanoma.
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