Ciliary neurotrophic factor receptor complex (CNTFR-LIFR-gp130) (CNTFR-LIFR-gp130)

The Ciliary neurotrophic factor receptor (CNTFR) complex is a tripartite signaling assembly consisting of the Ciliary neurotrophic factor receptor alpha (CNTFRα) subunit, the Leukemia inhibitory factor receptor beta (LIFRβ), and Glycoprotein 130 (gp130) (Source: UniProt P26992, P42702, P40189). Unlike many other cytokine receptors, the alpha subunit is GPI-anchored and lacks a transmembrane signaling domain, requiring the recruitment of LIFRβ and gp130 to initiate intracellular cascades (Source: Science 1993, 259:1736-9). This complex is a critical mediator of neuronal survival and differentiation, particularly within the motor neuron lineage, and is also expressed in the hypothalamus where it regulates energy balance (Source: PubMed: 11546868). Activation of the complex primarily triggers the JAK/STAT3 pathway, which has been explored therapeutically for treating neurodegenerative conditions like Amyotrophic Lateral Sclerosis (ALS) and metabolic disorders like obesity. However, clinical development of agonists like Axokine was hampered by the development of neutralizing antibodies and systemic side effects (Source: PubMed: 12637561). Despite these hurdles, the complex remains a significant target for regenerative medicine due to its potent neurotrophic and myotrophic activities.

Other names

CNTF receptor complexCNTFR/LIFR/gp130 complexCiliary neurotrophic factor receptor alpha-Leukemia inhibitory factor receptor beta-Glycoprotein 130 complexCNTFR-LIFR-gp130 heterotrimer

Agonism of the receptor complex leads to the activation of the JAK-STAT3, PI3K/Akt, and MAPK/ERK signaling pathways, promoting cell survival and modulating metabolic activity (Source: UniProt P26992, PubMed: 8438154).