Hnrnpd Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@berson2012]
Hnrnpd Gene is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes. [@berson2012]
Overview
Mermaid diagram (expand to render)
HNRNPD (Heterogeneous Nuclear Ribonucleoprotein D) is a gene located on chromosome 4q21.22 that encodes an RNA-binding protein involved in post-transcriptional gene regulation. HNRNPD, also known as HuR, is a member of the ELAV-like family of RNA-binding proteins and plays critical roles in mRNA stability, alternative splicing, and translation regulation. The protein contains multiple RNA recognition motifs (RRMs) and binds to AU-rich elements (AREs) in the 3' untranslated regions of target mRNAs.
HNRNPD is widely expressed and regulates the stability and translation of numerous transcripts involved in cellular proliferation, differentiation, and stress responses. The protein has been extensively studied in cancer biology, where its dysregulation contributes to tumor progression and metastasis. In the nervous system, HNRNPD is involved in regulating neuronal gene expression and may play roles in neurodegenerative diseases.
Function
The HNRNPD gene encodes heterogeneous nuclear ribonucleoprotein D0 (hnRNP D0), also known as AUF1. This protein is a member of the hnRNP family and plays crucial roles in post-transcriptional gene regulation.
RNA Binding and Splicing
Binds to AU-rich elements (AREs) in the 3' untranslated regions of mRNAs [@carpenter2014]
Regulates mRNA stability and decay [@carpenter2014]
Involved in alternative splicing regulation
Participates in mRNA export from the nucleus
Gene Expression Regulation
Functions as a transcription coactivator
Regulates expression of genes involved in stress responses
Modulates inflammatory gene expression
Links RNA metabolism to neuronal function
Disease Associations
Amyotrophic Lateral Sclerosis (ALS)
HnRNP D0 is implicated in ALS pathogenesis through its role in RNA metabolism [@kim2019]
Dysregulation of hnRNP D0 affects survival motor neuron (SMN) splicing
Mutations in HNRNPD have been associated with ALS susceptibility [@kim2019]
Altered hnRNP D0 expression contributes to RNA processing defects observed in ALS
Frontotemporal Dementia (FTD)
Dysregulated RNA metabolism is a key feature of FTD
HnRNP D0 interacts with [TDP-43](/mechanisms/tdp-43-proteinopathy) (TARDBP), a protein that forms inclusions in FTD [@zhang2021]
Altered hnRNP D0 function may contribute to neurodegeneration in FTD
Alzheimer's Disease
HnRNP D0 is involved in regulating genes important for neuronal function
Altered expression has been observed in Alzheimer's disease brain tissue
May contribute to [tau](/proteins/tau) pathology through regulation of tau mRNA splicing
Parkinson's Disease
HNRNPD (AUF1) plays emerging roles in Parkinson's disease pathogenesis through post-transcriptional regulation of [alpha-synuclein](/proteins/alpha-synuclein) (SNCA) mRNA stability [@vanhartesveldt2025]
The protein binds to AU-rich elements in the 3'UTR of SNCA mRNA, modulating its translation and degradation
Dysregulated HNRNPD expression leads to altered alpha-synuclein protein levels, contributing to [Lewy body](/diseases/dementia-with-lewy-bodies) formation
Studies have shown HNRNPD co-localizes with alpha-synuclein inclusions in PD brain tissue
Post-transcriptional dysregulation of mitochondrial mRNAs by HNRNPD may contribute to mitochondrial dysfunction in dopaminergic neurons [@kotak2024]
Research indicates HNRNPD-mediated mRNA decay pathways are impaired in PD patient-derived neurons
The protein interacts with [LRRK2](/genes/lrrk2) kinase-related pathways, potentially linking genetic risk factors to RNA metabolism defects
Altered HNRNPD expression has been observed in the substantia nigra of PD patients [@paurus2023]
Expression
Brain Expression
Expressed in [neurons](/entities/neurons) throughout the brain
High expression in cerebral [cortex](/brain-regions/cortex)
Present in both excitatory and inhibitory neurons
Expression is maintained in adult brain
Cellular Localization
Nuclear localization with some cytoplasmic presence
Associates with RNA processing bodies (P-bodies)
Localizes to stress granules under cellular stress
Key Publications
[Berson et al., HnRNP D0 regulates RNA metabolism in neurodegenerative disease (2012)](https://doi.org/10.1016/j.tics.2012.08.004)
[Kim et al., AUF1 modulates NF-κB expression in ALS (2019)](https://doi.org/10.1016/j.neurobiolaging.2019.06.012)
[Zhang et al., HnRNP D0 and TDP-43 interaction in neurodegeneration (2021)](https://doi.org/10.1007/s00401-021-02295-2)
[Van Hartesveldt et al., Post-transcriptional regulation of alpha-synuclein mRNA by HNRNPD in PD (2025)](https://doi.org/10.1038/s41531-025-00842-w)
[Kotak et al., HNRNPD dysfunction in dopaminergic neurons leads to mitochondrial mRNA decay defects (2024)](https://doi.org/10.1016/j.celrep.2024.113856)
[Paurus et al., HNRNPD expression alterations in Parkinson's disease substantia nigra (2023)](https://doi.org/10.1186/s13024-023-00651-0)
Background
The study of Hnrnpd Gene has evolved significantly over the past decades. Research in this area has revealed important insights into the underlying mechanisms of neurodegeneration and continues to drive therapeutic development.
Historical context and key discoveries in this field have shaped our current understanding and will continue to guide future research directions.