NRG2 - Neuregulin 2

NRG2 - Neuregulin 2

<div class="infobox infobox-gene">
<h3>NRG2</h3>
<table>
<tr><th>Symbol</th><td>NRG2</td></tr>
<tr><th>Full Name</th><td>Neuregulin 2</td></tr> [@walssbass2023]
<tr><th>Chromosome</th><td>5</td></tr> [@nave2019]
<tr><th>Location</th><td>5q31.2</td></tr> [@zhang2024]
<tr><th>NCBI Gene ID</th><td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=NRG2" target="_blank">NRG2</a></td></tr> [@hahn2022]
<tr><th>OMIM</th><td><a href="https://www.omim.org/entry/608521" target="_blank">608521</a></td></tr>
<tr><th>Ensembl ID</th><td><a href="https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000158457" target="_blank">ENSG00000158457</a></td></tr>
<tr><th>UniProt ID</th><td><a href="https://www.uniprot.org/uniprotkb/O14511" target="_blank">O14511</a></td></tr>
<tr><th>Associated Diseases</th><td>Schizophrenia,cognitive impairment,autism</td></tr>
</table>
</div>

Overview

NRG1 is a human gene whose product nRG2 signals through ErbB3 and ErbB4 receptors to regulate nervous system development and function:. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration.

NRG2 - Neuregulin 2

<div class="infobox infobox-gene">
<h3>NRG2</h3>
<table>
<tr><th>Symbol</th><td>NRG2</td></tr>
<tr><th>Full Name</th><td>Neuregulin 2</td></tr> [@walssbass2023]
<tr><th>Chromosome</th><td>5</td></tr> [@nave2019]
<tr><th>Location</th><td>5q31.2</td></tr> [@zhang2024]
<tr><th>NCBI Gene ID</th><td><a href="https://www.ncbi.nlm.nih.gov/gene/?term=NRG2" target="_blank">NRG2</a></td></tr> [@hahn2022]
<tr><th>OMIM</th><td><a href="https://www.omim.org/entry/608521" target="_blank">608521</a></td></tr>
<tr><th>Ensembl ID</th><td><a href="https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000158457" target="_blank">ENSG00000158457</a></td></tr>
<tr><th>UniProt ID</th><td><a href="https://www.uniprot.org/uniprotkb/O14511" target="_blank">O14511</a></td></tr>
<tr><th>Associated Diseases</th><td>Schizophrenia,cognitive impairment,autism</td></tr>
</table>
</div>

Overview

NRG1 is a human gene whose product nRG2 signals through ErbB3 and ErbB4 receptors to regulate nervous system development and function:. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration.

Neuregulin 2 (NRG2) is a member of the neuregulin family of growth factors that signal through ErbB receptor tyrosine kinases. While NRG1 is the most studied neuregulin, NRG2 has distinct expression patterns and functions in the nervous system. NRG2 promotes oligodendrocyte differentiation, Schwann cell development, and synaptic plasticity. It is implicated in schizophrenia, bipolar disorder, and cognitive dysfunction. NRG2-ErbB4 signaling regulates GABAergic interneuron function and cortical circuit development.[1][2]

Function

NRG2 signals through ErbB3 and ErbB4 receptors to regulate nervous system development and function:

Oligodendrocyte Development: NRG2 promotes oligodendrocyte progenitor differentiation and myelination. It cooperates with NRG1 to regulate the timing of myelination in the CNS.

Schann Cell Function: NRG2 supports Schwann cell survival, proliferation, and myelination in the peripheral nervous system. It maintains the neuromuscular junction.

Synaptic Plasticity: NRG2-ErbB4 signaling modulates GABAergic interneuron function, affecting synaptic inhibition and circuit balance. This regulates cortical gamma oscillations important for cognitive processing.

Hippocampal Function: NRG2 is expressed in hippocampal interneurons where it regulates synaptic plasticity and spatial memory formation.

Neuroprotection: NRG2 exhibits neuroprotective properties against excitotoxicity and oxidative stress in dopaminergic [neurons](/entities/neurons).

Psychiatric Disease Link: Reduced NRG2 expression and ErbB4 signaling contribute to GABAergic dysfunction observed in schizophrenia and bipolar disorder.[3][4]

Disease Associations

Schizophrenia,cognitive impairment,autism[5][6]

Expression

NRG2 is expressed in the brain with highest expression in the [hippocampus](/brain-regions/hippocampus) (CA1, CA3, dentate gyrus), [cortex](/brain-regions/cortex) (layers II-IV), and cerebellum. In peripheral nervous system, expression is in Schwann cells and muscle. NRG2 expression is regulated by neuronal activity and is induced during synaptic plasticity.[7]

Therapeutic Implications

Target Rationale: NRG2-ErbB4 signaling is a validated target for schizophrenia and cognitive disorders; enhancing this pathway may improve synaptic function.

Potential Approaches:

• Recombinant NRG2 protein for CNS delivery ([blood-brain barrier](/entities/blood-brain-barrier) challenge)
• Small molecule ErbB4 agonists
• Gene therapy to increase NRG2 expression
• Protease inhibitors to prevent NRG2 cleavage/inactivation

See Also

• [Genes*: [NRG1](/genes/nrg1), [NRG3](/genes/nrg3), [ERBB2](/genes/erbb2), [ERBB3](/genes/erbb3), [ERBB4](/genes/erbb4), [GABRA1](/genes/gabra1), [RELN](/genes/reln)](/genes)
• [Pathways*: [Neuregulin Signaling](/mechanisms/neuregulin-signaling), [Oligodendrocyte Development](/mechanisms/oligodendrocyte-development), [Synaptic Plasticity](/mechanisms/synaptic-plasticity), [Myelination](/mechanisms/myelination), [GABAergic Signaling](/mechanisms/gabaergic-signaling)](/mechanisms)

External Links

• [NCBI Gene](https://www.ncbi.nlm.nih.gov/gene/?term=NRG2)
• [Ensembl](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000158457)
• [UniProt](https://www.uniprot.org/uniprotkb/O14511)
• [OMIM](https://www.omim.org/entry/608521)

References