IKBKE (IKKε)

IKBKE

IKBKE (Inhibitor of Nuclear Factor Kappa-B Kinase Subunit Epsilon), also known as IKKε or IKK-Epsilon, is a serine/threonine protein kinase that plays important roles in the innate immune response, inflammatory signaling, and has been implicated in cancer and metabolic diseases. It is one of the IKK family members (IKKα, IKKβ, IKKγ, IKKε, TBK1).

Gene Overview

<div class="infobox infobox-gene">
| Property | Value |
|----------|-------|
| Gene Symbol | IKBKE |
| Full Name | Inhibitor of Nuclear Factor Kappa-B Kinase Subunit Epsilon |
| Chromosomal Location | 1q31.3 |
| NCBI Gene ID | 9641 |
| OMIM | 605048 |
| Ensembl | ENSG00000105468 |
| UniProt | Q14164 |
| Associated Diseases | Breast cancer, pancreatic cancer, inflammatory diseases, viral infections |
</div>

Overview

IKBKE

IKBKE (Inhibitor of Nuclear Factor Kappa-B Kinase Subunit Epsilon), also known as IKKε or IKK-Epsilon, is a serine/threonine protein kinase that plays important roles in the innate immune response, inflammatory signaling, and has been implicated in cancer and metabolic diseases. It is one of the IKK family members (IKKα, IKKβ, IKKγ, IKKε, TBK1).

Gene Overview

<div class="infobox infobox-gene">
| Property | Value |
|----------|-------|
| Gene Symbol | IKBKE |
| Full Name | Inhibitor of Nuclear Factor Kappa-B Kinase Subunit Epsilon |
| Chromosomal Location | 1q31.3 |
| NCBI Gene ID | 9641 |
| OMIM | 605048 |
| Ensembl | ENSG00000105468 |
| UniProt | Q14164 |
| Associated Diseases | Breast cancer, pancreatic cancer, inflammatory diseases, viral infections |
</div>

Overview

IKBKE is a human gene whose product iKBKE is a non-canonical IKK family member that phosphorylates IkappaB proteins and activates [NF-kappaB](/entities/nf-kb) signaling, but also has IkappaB-independent functions["@hemmings2007"]:. Variants in IKBKE have been implicated in Cancer, Inflammation, Neurodegeneration. This page covers the gene's normal function, disease associations, expression patterns, and key research findings relevant to neurodegeneration.

Normal Function

IKBKE is a non-canonical IKK family member that phosphorylates IκB proteins and activates NF-κB signaling, but also has IκB-independent functions[@hemmings2007]:

NF-κB Activation

• IκB Phosphorylation: Phosphorylates IκBα and IκBβ, leading to NF-κB activation
• IKK Complex: Can form complexes with IKKγ/NEMO for NF-κB signaling
• Alternative Pathway: Mediates TLR-induced NF-κB activation

Immune Signaling

• TLR Response: Essential for TLR3 and [TLR4](/entities/tlr4)-mediated antiviral responses
• Type I IFN Induction: Critical for IRF3/IRF7 activation and IFN-β production[@fitzgerald2003]
• Viral Defense: Coordinates innate immune response to viral infections

Metabolic Functions

• Insulin Signaling: IKBKE is activated by insulin and modulates insulin sensitivity
• Adipogenesis: Regulates adipocyte differentiation
• Lipid Metabolism: Influences fatty acid oxidation and storage

Disease Associations

Cancer

• Oncogenic Driver: IKBKE is amplified and overexpressed in breast cancer[@hershko2004]
• Tumor Survival: Promotes tumor cell survival and proliferation
• Metastasis: Associated with metastatic potential

Inflammation

• Autoimmune Diseases: Elevated IKBKE activity in rheumatoid arthritis and lupus
• Inflammatory Bowel Disease: Contributes to chronic intestinal inflammation
• Multiple Sclerosis: Altered signaling in CNS autoimmunity

Neurodegeneration

• Alzheimer's Disease: IKBKE is upregulated in AD brains and promotes neuroinflammation
• Parkinson's Disease: Contributes to microglial activation and dopaminergic neuron loss
• ALS: Altered immune signaling in motor neuron disease

Expression Pattern

IKBKE shows tissue-specific expression:

• High Expression: Lymphoid tissues, thymus, spleen
• Moderate Expression: Heart, brain, lung, liver
• Cellular Sources: Macrophages, dendritic cells, [neurons](/entities/neurons), [astrocytes](/entities/astrocytes)

Therapeutic Implications

Drug Development

• IKBKE Inhibitors: Several small molecule inhibitors in preclinical/clinical development
• Combination Therapy: IKBKE inhibitors with immunotherapy for cancer

Research Directions

• Targeting IKBKE in neuroinflammation
• Understanding isoform-specific functions

Cross-Links

• [NF-κB](/mechanisms/nf-kappa-b) - Primary pathway
• [IKBKB](/genes/ikbkb) - Family member
• [TBK1](/genes/tbak1) - Family member
• [TLR Signaling](/mechanisms/tlr-signaling) - Pathway
• [Microglia](/cell-types/microglia) - CNS cells

See Also

• [NF-κB](/mechanisms/nf-kappa-b)
• [TLR Signaling](/mechanisms/tlr-signaling)

External Links

• [Ensembl: ENSG00000105468](https://www.ensembl.org/Homo_sapiens/Gene/Summary?g=ENSG00000105468)
• [NCBI Gene: IKBKE](https://www.ncbi.nlm.nih.gov/gene/?term=IKBKE)
• [GeneCards: IKBKE](https://www.genecards.org/cgi-bin/carddisp.pl?gene=IKBKE)
• [OMIM: IKBKE](https://omim.org/search?search=IKBKE)
• [Allen Brain Atlas: IKBKE](https://human.brain-map.org/microarray/search/show?search_term=IKBKE)

References

Pathway Diagram

The following diagram shows the key molecular relationships involving IKBKE (IKKε) discovered through SciDEX knowledge graph analysis: