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Emerging Role of the Slit/Roundabout (Robo) Signaling Pathway in Glioma Pathogenesis and Potential Therapeutic
Mariam Markouli1,2, Athina Papachristou1, Anastasios Politis1,3
1Department of Biological Chemistry, School of Medicine, National and Kapodistrian University of Athens, 11527 Athens, Greece.
Abstract:
Gliomas represent the most common primary Central Nervous System (CNS) tumors, characterized by increased heterogeneity, dysregulated intracellular signaling, extremely invasive properties, and a dismal prognosis. They are generally resistant to existing therapies and only a few molecular targeting options are currently available. In search of signal transduction pathways with a potential impact in glioma growth and immunotherapy, the Slit guidance ligands (Slits) and their Roundabout (Robo) family of receptors have been revealed as key regulators of tumor cells and their microenvironment. Recent evidence indicates the implication of the Slit/Robo signaling pathway in inflammation, cell migration, angiogenesis, and immune cell infiltration of gliomas, suppressing or promoting the expression of pivotal proteins, such as cell adhesion molecules, matrix metalloproteinases, interleukins, angiogenic growth factors, and immune checkpoints. Herein, we discuss recent data on the significant implication of the Slit/Robo signaling pathway in glioma pathology along with the respective targeting options, including immunotherapy, monoclonal antibody therapy, and protein expression modifiers.
Insights
The Slit/Robo signaling pathway significantly impacts glioma growth and immune response. Targeting this pathway offers new therapeutic strategies for brain tumors, including immunotherapy.
Area of Science:
- Neuro-oncology
- Molecular Biology
- Immunology
Background:
- Gliomas are aggressive primary Central Nervous System (CNS) tumors with poor prognosis and limited treatment options.
- Tumor heterogeneity, invasive growth, and resistance to therapy are hallmarks of gliomas.
- Understanding novel signaling pathways is crucial for developing effective glioma treatments.
Purpose of the Study:
- To explore the role of the Slit/Robo signaling pathway in glioma development and progression.
- To investigate the pathway's influence on the tumor microenvironment and immune infiltration.
- To discuss potential therapeutic targeting strategies for gliomas involving Slit/Robo signaling.
Main Methods:
- Review of recent scientific literature on Slit/Robo signaling in gliomas.
- Analysis of the pathway's involvement in key cellular processes like migration and angiogenesis.
- Examination of Slit/Robo's impact on immune checkpoints and inflammatory mediators.
Main Results:
- The Slit/Robo pathway regulates critical proteins involved in glioma cell adhesion, invasion, and angiogenesis.
- This signaling pathway modulates immune cell infiltration and the expression of immune checkpoints within the glioma microenvironment.
- Slit/Robo signaling can either promote or suppress tumor growth depending on the context.
Conclusions:
- The Slit/Robo pathway is a significant factor in glioma pathology, affecting tumor growth and the immune landscape.
- Targeting the Slit/Robo pathway presents promising therapeutic avenues for gliomas.
- Potential strategies include immunotherapy, monoclonal antibody therapy, and modulation of protein expression.
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