Related Experiment Video
Updated: Jul 15, 2025
06:09
Spatial and Temporal Control of Murine Melanoma Initiation from Mutant Melanocyte Stem Cells
Published on: June 7, 2019
8.8K
Microenvironmental GABA Signaling Regulates Melanomagenesis through Reciprocal Melanoma-Keratinocyte Communication
Craig J Ceol1,2
1Program in Molecular Medicine, University of Massachusetts Chan Medical School, Worcester, Massachusetts.
Cancer Discovery
|October 5, 2023
Summary
Melanoma cells use GABA signaling to promote tumor growth. This neurotransmitter signaling plays a key role in melanoma initiation and expansion, highlighting nonneuronal roles in cancer progression.
Area of Science:
- Oncology
- Cell Biology
- Neuroscience
Background:
- Melanoma is a significant form of skin cancer.
- The role of neurotransmitters in cancer, particularly nonneuronal signaling, is an emerging area of research.
Purpose of the Study:
- To investigate the role of gamma-aminobutyric acid (GABA) signaling in melanoma growth.
- To elucidate the mechanisms by which melanoma cells influence surrounding keratinocytes to promote tumor progression.
Main Methods:
- Analysis of GABA signaling pathways in melanoma cells.
- Investigating the interaction between melanoma cells and keratinocytes in a tumor microenvironment model.
Main Results:
- GABA secreted by melanoma cells was identified as a key factor stimulating keratinocyte-driven melanoma growth.
- This study demonstrates a novel mechanism of tumor-stroma interaction mediated by neurotransmitter signaling.
Conclusions:
- Nonneuronal signaling via GABA is crucial for melanoma initiation and outgrowth.
- Targeting GABA signaling pathways could represent a new therapeutic strategy for melanoma treatment.
Related Concept Videos
01:19Interactions Between Signaling Pathways
6.3K
Signaling cascades usually lack linearity. Multiple pathways interact and regulate one another, allowing cells to integrate and respond to diverse environmental stimuli.
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
Convergence and divergence, and cross-talk between signaling pathways
Two distinct signaling pathways can converge on a single functional unit, which may either be a single protein or a complex of proteins. The response is either functionally distinct or synergistic between the two pathways but different from the response...
6.3K
02:17The Tumor Microenvironment
6.7K
Every normal cell or tissue is embedded in a complex local environment called stroma, consisting of different cell types, a basal membrane, and blood vessels. As normal cells mutate and develop into cancer cells, their local environment also changes to allow cancer progression. The tumor microenvironment (TME) consists of a complex cellular matrix of stromal cells and the developing tumor. The cross-talk between cancer cells and surrounding stromal cells is critical to disrupt normal tissue...
6.7K
01:16TGF - β Signaling Pathway
7.4K
The TGF-β signaling pathway regulates cell growth, differentiation, adhesion, motility, and development. TGF-β ligands that induce TGF-β signaling are synthesized in their latent form. Several proteases or cell surface receptors such as integrins act upon the latent form, releasing the active ligand. There are three types of mammalian TGF-βs: (TGF-β1, TGF-β2, and TGF-β3) that bind as homodimers or heterodimers to TGF-β receptors. The TGF-β receptors...
7.4K
01:22Activation and Inactivation of G Proteins
7.2K
Heterotrimeric G proteins are guanine nucleotide-binding proteins. As the name suggests, heterotrimeric G proteins are composed of three subunits: alpha, beta, and gamma. They remain GDP-bound or GTP-bound inside the cells and switch between inactive/active states. The Gα subunit possesses the nucleotide-binding pocket that binds guanine nucleotides and switches between GDP or GTP-bound states. In contrast, the Gꞵ and Gγ subunits are always bound together with high...
7.2K
02:38Mitogens and the Cell Cycle
6.5K
Mitogens and their receptors play a crucial role in controlling the progression of the cell cycle. However, the loss of mitogenic control over cell division leads to tumor formation. Therefore, mitogens and mitogen receptors play an important role in cancer research. For instance, the epidermal growth factor (EGF) - a type of mitogen and its transmembrane receptor (EGFR), decides the fate of the cell's proliferation. When EGF binds to EGFR, a member of the ErbB family of tyrosine kinase...
6.5K
02:33Hedgehog Signaling Pathway
7.4K
The Hedgehog gene (Hh) was first discovered due to its control of the growth of disorganized, hair-like bristles phenotype in Drosophila, much like hedgehog spines. Hh plays a crucial role in the development of organs and the maintenance of homeostasis in both invertebrates and vertebrates. However, while Drosophila has only one Hh protein, mammals have multiple functional Hedgehog proteins - Sonic (Shh), Desert (Dhh), and Indian Hedgehog (Ihh). All of these homologous proteins have adapted to...
7.4K