{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Glial cell line‐derived neurotrophic factor (GDNF) family receptor alpha‐2 (GFRA2) is emerging as a multifunctional co‐receptor with diverse roles in neuropsychiatric, neurodegenerative, oncologic, and developmental contexts. Genetic association studies have implicated GFRA2 in modulating treatment response in schizophrenia, as one of several loci associated with iloperidone efficacy and with clozapine response, suggesting it may influence both disease susceptibility and therapeutic outcome."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "1"}]}, {"type": "t", "text": " Moreover, GFRA2‐related pathways have been proposed as potential targets in frontotemporal lobar degeneration"}, {"type": "fg", "children": [{"type": "fg_f", "ref": "3"}]}, {"type": "t", "text": ", and polymorphisms near the GFRA2 locus have been associated with diabetic neuropathic pain."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "4"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Functionally, GFRA2 acts as a co‐receptor for ligands such as neurturin and, together with RET, orchestrates neurotrophic signaling. Structural and biochemical studies have elucidated aspects of this interaction—demonstrating ligand binding, receptor docking, and even the involvement of heparan sulfate in complex assembly."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "5"}]}, {"type": "t", "text": " In malignancies such as acute myeloid leukemia and neuroblastoma, GFRA2-containing complexes drive oncogenic signaling cascades (including activation of the PI3K/AKT pathway) that promote cellular proliferation and survival."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "7"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Beyond tumorigenesis and neuropsychiatric applications, GFRA2 has critical roles in neural development. In dorsal root ganglion sensory neurons, for example, GFRA2 (in cooperation with GFRA1) facilitates proper central projection growth through both cis and trans signaling mechanisms."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "9"}]}, {"type": "t", "text": " In a striking extension of its developmental importance, GFRA2 expression demarcates cardiac progenitor populations and is essential for cardiomyocyte differentiation via a non‐canonical pathway independent of RET."}, {"type": "fg", "children": [{"type": "fg_f", "ref": "10"}]}, {"type": "t", "text": " \n "}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Collectively, these findings illustrate that GFRA2 is not only a key component of neurotrophic receptor complexes but also a versatile modulator of signaling pathways involved in neuronal survival, differentiation, and plasticity as well as in oncogenic and cardiac developmental processes. Its involvement in diverse cellular contexts makes GFRA2 a promising target for therapeutic intervention across a range of diseases.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "C Lavedan, L Licamele, S Volpi, et al. "}, {"type": "b", "children": [{"type": "t", "text": "Association of the NPAS3 gene and five other loci with response to the antipsychotic iloperidone identified in a whole genome association study."}]}, {"type": "t", "text": " "}, {"type": "i", "children": [{"type": "t", "text": "Mol Psychiatry (2009)"}]}, {"type": "t", "text": " DOI: "}, {"type": "a", "children": [{"type": "t", "text": "10.1038/mp.2008.56"}], "href": "https://doi.org/10.1038/mp.2008.56"}, {"type": "t", "text": " PMID: "}, {"type": "a", "children": [{"type": "t", "text": "18521090"}], "href": "https://pubmed.ncbi.nlm.nih.gov/18521090"}]}, {"type": "r", "ref": 2, "children": [{"type": "t", "text": "Joseph T Glessner, Kai Wang, Patrick M A Sleiman, et al. 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