Pathway Summary for FGFRL1

Overview

FGFRL1 (Fibroblast Growth Factor Receptor-Like 1) is an atypical FGF receptor that lacks the intracellular tyrosine kinase domain. It functions as a decoy receptor that sequesters FGF ligands, modulating FGF signaling pathways. FGFRL1 plays critical roles in skeletal development, kidney morphogenesis, and cardiovascular development.

Core Pathways

FGF Signaling Modulation

FGFRL1 regulates FGF signaling through:
- Ligand sequestration (FGF2, FGF8)
- Competition with canonical FGF receptors
- Formation of non-signaling complexes
- Negative regulation of FGF pathways

Skeletal Development

FGFRL1 controls bone and cartilage formation via:
- Chondrocyte differentiation regulation
- Osteoblast maturation
- Growth plate organization
- Skeletal patterning

Pathway Diagram

graph TD A[FGF Ligands] --> B[FGFRL1: Decoy Receptor] A --> C[FGFR1-4: Canonical Receptors] B --|sequesters| A C --> D[RAS/MAPK] C --> E[PI3K/AKT] C --> F[PLCĪ³] B --> G[No Kinase Domain] G --> H[Signal Attenuation] B --> I[Skeletal Development] B --> J[Kidney Morphogenesis] style B fill:#f9f,stroke:#333,stroke-width:2px

Clinical Significance