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Roundabout guidance receptor 1 (ROBO1)

Target: ROBO1
Molecular classification: Receptor, Axon guidance receptor, Cell adhesion receptor, Immunoglobulin superfamily (single-pass transmembrane receptor)

Overview

Roundabout guidance receptor 1 (ROBO1) is a single-pass transmembrane cell surface receptor that belongs to the immunoglobulin superfamily and functions primarily as an axon guidance receptor by mediating cellular repulsive responses to the secreted SLIT-family ligands. ROBO1 plays a key role in directing axons within the central nervous system by regulating their crossing at the midline and also contributes to cell migration, adhesion, angiogenesis, and organ development. In humans, ROBO1 has been linked to neurodevelopmental disorders such as dyslexia and is implicated in cancer biology, notably in tumor angiogenesis and progression. While direct therapeutic modulation is not clinically established, ROBO1 and its signaling pathway are under investigation as both targets and biomarkers in oncology and neurodevelopmental research.

Other names: Roundabout homolog 1ROBO1Robo1Roundabout1 (in Drosophila)

Mechanism of action

Modulation of Slit-ROBO signaling (antibody or ligand mimics modulating repulsion/guidance pathways) Inhibition of receptor-ligand interaction (preclinical work) Modulation of axon guidance and cell migratory behaviors (general mechanism)

Biological functions

Axon guidanceCell migrationNeuronal precursor cell guidanceMidline crossing recognition (axon midline choice)Cell adhesionAngiogenesisOrgan developmentNeurogenesis

Disease associations

Cancer (angiogenesis, tumor progression, particularly glioma and other tumors)Neurodevelopmental disorders (including association with dyslexia)Possibly neurodegenerative disease (by role in neural development)

Safety considerations

Potential safety concerns relate to effects on neurodevelopment, cell migration, and angiogenesis, as these are essential for normal tissue formation and neural patterning. Therapeutic challenges include risk of off-target neural developmental effects and unwanted modulation of tissue vasculature and migration.

Interacting drugs

No approved drugs directly targeting ROBO1 reported in current curated resources. In cancer research, anti-ROBO1 antibodies and Slit pathway modulators are being explored experimentally, but not established as clinical drugs yet.

Biomarkers

ROBO1 expression levels have been studied as biomarkers in certain cancers (e.g., glioma, lung cancer)Genetic polymorphisms or disruptions noted in neurodevelopmental traits (e.g., dyslexia, studied as risk marker)

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