ELAV-like protein 4 (ELAVL4)

ELAV-like protein 4 (ELAVL4), commonly known as HuD, is a neuron-specific RNA-binding protein that serves as a master regulator of post-transcriptional gene expression. It primarily functions by binding to AU-rich elements (AREs) within the 3' untranslated regions of target mRNAs, such as GAP-43, BDNF, and Tau, thereby increasing their stability and promoting their translation. This regulation is vital for neuronal processes including differentiation, axonal outgrowth, and synaptic plasticity, as well as for insulin secretion in pancreatic beta cells. Pathologically, ELAVL4 is linked to neurodegenerative diseases like Alzheimer's and Parkinson's, where its dysregulation affects the expression of key disease-associated proteins. Furthermore, it is a major autoantigen in paraneoplastic neurological syndromes, where anti-Hu antibodies produced in response to small cell lung cancer lead to widespread neuronal damage. Although no specific drugs are currently approved to target ELAVL4, its central role in neurodegeneration and oncology makes it a significant candidate for future therapeutic development, including the use of antisense oligonucleotides and small molecule modulators.

Other names

HuDELAV-like RNA-binding protein 4PN27Hu-antigen D

Post-transcriptional regulation of mRNA stability and translation by binding to AU-rich elements (AREs) in the 3' untranslated regions (UTRs) of target transcripts, such as GAP-43, BDNF, and Tau.