IL1B Gene - Interleukin 1 Beta

IL1B Gene

Pathway Diagram

```mermaid
flowchart TD
IL1B["IL1B<br/>Interleukin-1 Beta"]
NLRP3["NLRP3<br/>Inflammasome"]
CASP1["CASP1<br/>Caspase-1"]
PYCARD["PYCARD<br/>ASC Adapter"]

Inflammasome_Complex["Inflammasome<br/>Complex"]
Pro_IL1B["Pro-IL1B<br/>Precursor"]
Mature_IL1B["Mature IL1B<br/>Active Cytokine"]

Neuroinflammation["Neuroinflammation<br/>Process"]
Microglia_Activation["Microglia<br/>Activation"]

Alzheimer["Alzheimer's<br/>Disease"]
Parkinson["Parkinson's<br/>Disease"]
ALS["ALS<br/>Disease"]
MS["Multiple<br/>Sclerosis"]

Neurodegeneration["Neurodegeneration<br/>Outcome"]
Therapeutic_Target["Therapeutic<br/>Target"]

NLRP3 -->|"assembles"| Inflammasome_Complex
PYCARD -->|"bridges"| Inflammasome_Complex
CASP1 -->|"recruited to"| Inflammasome_Complex

Inflammasome_Complex -->|"cleaves"| Pro_IL1B
Pro_IL1B -->|"processed to"| Mature_IL1B
Mature_IL1B -->|"is"| IL1B

IL1B -->|"activates"| Neuroinflammation
IL1B -->|"triggers"| Microglia_Activation
Neuroinflammation -->|"promotes"| Neurodegeneration

IL1B -->|"associated with"| Alzheimer
IL1B -->|"regulates"| Parkinson
IL1B -->|"expressed in"| ALS
IL1B -->|"activates"| MS

Alzheimer -->|"contributes to"| Neurodegeneration
Parkinson -->|"contributes to"| Neurodegeneration
ALS -->|"contributes to"| Neurodegeneration
MS -->|"contributes to"| Neurodegeneration

IL1B -->|"serves as"| Therapeutic_Target

style IL1B fill:#006494
style NL

IL1B Gene

Pathway Diagram

Introduction

Il1B Gene Interleukin 1 Beta is an important component in the neurobiology of neurodegenerative diseases. This page provides detailed information about its structure, function, and role in disease processes.

Overview

This page provides comprehensive information about IL1B Gene, including its structure, normal function in the nervous system, and its role in neurodegenerative diseases.

<div class="infobox infobox-gene">
<div class="infobox-header">IL1B</div>
<div class="infobox-content">
<table>
<tr><td><strong>Full Name</strong></td><td>Interleukin 1 Beta</td></tr>
<tr><td><strong>Chromosomal Location</strong></td><td>2q14.1</td></tr>
<tr><td><strong>NCBI Gene ID</strong></td><td><a href="https://www.ncbi.nlm.nih.gov/gene/3553" target="_blank">3553</a></td></tr>
<tr><td><strong>OMIM</strong></td><td><a href="https://www.omim.org/entry/164520" target="_blank">164520</a></td></tr>
<tr><td><strong>Ensembl ID</strong></td><td>ENSG00000125538</td></tr>
<tr><td><strong>UniProt ID</strong></td><td><a href="https://www.uniprot.org/uniprot/P01584" target="_blank">P01584</a></td></tr>
<tr><td><strong>Protein</strong></td><td>IL-1β</td></tr>
<tr><td><strong>Associated Diseases</strong></td><td>Alzheimer's Disease, Parkinson's Disease, ALS, Neuroinflammation</td></tr>
</table>
</div>
</div>

Function

The IL1B gene encodes interleukin-1 beta (IL-1β), a pro-inflammatory cytokine member of the interleukin-1 family. IL-1β is a key mediator of the inflammatory response and plays a crucial role in the innate immune system. In the central nervous system, IL-1β is produced by [microglia](/entities/microglia), [astrocytes](/entities/astrocytes), and [neurons](/entities/neurons) in response to injury, infection, or disease-associated molecular patterns (DAMPs).

IL-1β binds to the interleukin-1 receptor type I (IL-1R1), forming a complex that activates the MyD88-dependent signaling pathway, leading to activation of [NF-κB](/entities/nf-kb) and MAP kinases. This results in the expression of additional inflammatory mediators, chemokines, and adhesion molecules.

Key Functions in the Nervous System:

• Neuroinflammation Regulation: IL-1β is a primary driver of neuroinflammation in neurodegenerative diseases
• Fever Induction: Acts on the hypothalamus to induce fever through prostaglandin synthesis
• Sleep Regulation: Influences non-rapid eye movement (NREM) sleep
• Pain Modulation: Involved in inflammatory pain sensitization
• Synaptic Plasticity: Modulates [long-term potentiation](/mechanisms/long-term-potentiation) (LTP) and memory formation

Disease Associations

Alzheimer's Disease

• Elevated IL-1β levels are found in the brains and CSF of AD patients
• IL-1β promotes [amyloid-beta](/proteins/amyloid-beta) (Aβ) production and aggregation
• Enhances [tau](/proteins/tau) phosphorylation and neurofibrillary tangle formation
• Drives chronic neuroinflammation that contributes to neuronal loss
• IL1B polymorphisms (e.g., -511 C>T) have been associated with increased AD risk

Parkinson's Disease

• IL-1β contributes to dopaminergic neuron death in the substantia nigra
• Elevated in the substantia nigra and striatum of PD patients
• polymorphisms in IL1B promoter region associated with PD susceptibility
• Mediates [microglia](/cell-types/microglia) activation and neuroinflammation in PD models

ALS (Amyotrophic Lateral Sclerosis)

• Elevated IL-1β in CSF and spinal cord of ALS patients
• Contributes to motor neuron death through inflammatory mechanisms
• IL-1β polymorphisms may influence disease progression

Neuroinflammation in Other Disorders

• Multiple Sclerosis (MS)
• Frontotemporal Dementia (FTD)
• [Huntington's Disease](/diseases/huntingtons-disease)
• Traumatic Brain Injury (TBI)

Expression

IL1B is expressed in various brain regions with notable expression in:

• [Hippocampus](/brain-regions/hippocampus): High expression in CA1-CA3 regions and dentate gyrus
• [Cortex](/brain-regions/cortex): Particularly in layers II-III and V
• Thalamus: Moderate expression
• Hypothalamus: Involved in fever and sleep regulation
• Basal Ganglia: Including substantia nigra

• Neuronal activity
• Glial cell activation
• Pathological stimuli ([Aβ](/proteins/amyloid-beta), [α-synuclein](/proteins/alpha-synuclein), mutant huntingtin)

Key Publications

Therapeutic Targeting

| Approach | Description | Status |
|----------|-------------|--------|
| IL-1R Antagonists | Anakinra, Canakinumab block IL-1R signaling | Clinical trials |
| IL-1β Antibodies | Bezafibrate reduces IL-1β production | Preclinical |
| [NLRP3](/proteins/nlrp3) Inhibitors | Target inflammasome that activates IL-1β | Clinical trials |
| Small Molecule Inhibitors | Direct IL-1β convertase inhibitors | Development |

Background

The study of Il1B Gene Interleukin 1 Beta 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.

References

<sup>[[1]](https://pubmed.ncbi.nlm.nih.gov/15033708/)</sup> IL-1beta and neuroinflammation in Alzheimer disease. PMID: 15033708(https://pubmed.ncbi.nlm.nih.gov/15033708/)

See Also

• [Neuroinflammation Pathway](/mechanisms/neuroinflammation-pathway)
• [Microglia](/cell-types/microglia)
• TNF Gene
• [Alzheimer's Disease](/diseases/alzheimers-disease)
• [Parkinson's Disease](/diseases/parkinsons-disease)
• [ALS](/diseases/amyotrophic-lateral-sclerosis)
• Cytokines in Neurodegeneration

External Links

Brain Atlas Resources

• [Allen Human Brain Atlas - IL1B Expression](https://human.brain-map.org/microarray/search/show?search_term=IL1B)
• [Allen Cell Type Atlas - IL1B](https://celltypes.brain-map.org/)
• [BrainSpan - IL1B Developmental Expression](https://brainspan.org/)
• [Allen Mouse Brain Atlas - IL1B](https://mouse.brain-map.org/)
• [NCBI Gene: IL1B](https://www.ncbi.nlm.nih.gov/gene/3553)
• [UniProt: IL1B](https://www.uniprot.org/uniprot/P01584)
• [OMIM: IL1B](https://www.omim.org/entry/164520)
• [GeneCards: IL1B](https://www.genecards.org/cgi-bin/carddisp.pl?gene=IL1B)

Related Hypotheses

From the [SciDEX Exchange](/exchange) — scored by multi-agent debate

• [Microbial Inflammasome Priming Prevention](/hypothesis/h-e7e1f943) — <span style="color:#ffd54f;font-weight:600">0.58</span> · Target: NLRP3, CASP1, IL1B, PYCARD

Pathway Diagram

The following diagram shows the key molecular relationships involving IL1B Gene - Interleukin 1 Beta discovered through SciDEX knowledge graph analysis: