ELAVL2 and ELAVL4 are paralogs in the ELAVL family, characterized by their RNA recognition motifs (RRMs) that bind AU-rich elements (AREs) in mRNA 3’ untranslated regions (3’UTRs). This binding stabilizes mRNA transcripts, regulating genes involved in neuronal differentiation, synaptic plasticity, and tumor suppression .
ELAVL2: Expressed in retinal progenitor cells, ganglion cells, and amacrine cells, with roles in maintaining retinal function and visual acuity . It regulates transcription factors critical for neuronal differentiation .
ELAVL4: Enriched in cortical neurons and radial glial cells, influencing neuronal migration and axonogenesis . It stabilizes proto-oncogenic transcripts like N-myc and tumor suppressors like p27 .
Retinal Development: ELAVL2-deficient mice exhibit reduced retinal ganglion cell activity and impaired visual acuity .
Neurodegeneration: Dysregulation of ELAVL2/ELAVL4 correlates with Alzheimer’s disease and autism spectrum disorder .
Glioblastoma (GBM): ELAVL2 loss promotes mesenchymal transition and chemoresistance in GBM, while its overexpression improves survival .
Small Cell Lung Cancer (SCLC): ELAVL4 is a diagnostic marker, with 100% positivity in SCLC cells .
Immunohistochemistry: Detects neuronal markers in paraneoplastic encephalomyelitis .
Co-Immunoprecipitation: Identifies protein complexes involving ELAVL4 in neuronal progenitors .