The DOI matches its Crossref record; 51 of the 51 references it cites were found in a registry or an index.
Two Novel IL-1 Family Members, IL-1δ and IL-1ε, Function as an Antagonist and Agonist of NF-κB Activation Through the Orphan IL-1 Receptor-Related Protein 2
Abstract
IL-1 is of utmost importance in the host response to immunological challenges. We identified and functionally characterized two novel IL-1 ligands termed IL-1δ and IL-1ε. Northern blot analyses show that these IL-1s are highly abundant in embryonic tissue and tissues containing epithelial cells (i.e., skin, lung, and stomach). In extension, quantitative real-time PCR revealed that of human skin-derived cells, only keratinocytes but not fibroblasts, endothelial cells, or melanocytes express IL-1δ and ε. Levels of keratinocyte IL-1δ are ∼10-fold higher than those of IL-1ε. In vitro stimulation of keratinocytes with IL-1β/TNF-α significantly up-regulates the expression of IL-1ε mRNA, and to a lesser extent of IL-1δ mRNA. In NF-κB-luciferase reporter assays, we demonstrated that IL-1δ and ε proteins do not initiate a functional response via classical IL-1R pairs, which confer responsiveness to IL-1α and β or IL-18. However, IL-1ε activates NF-κB through the orphan IL-1R-related protein 2 (IL-1Rrp2), whereas IL-1δ, which shows striking homology to IL-1 receptor antagonist, specifically and potently inhibits this IL-1ε response. In lesional psoriasis skin, characterized by chronic cutaneous inflammation, the mRNA expression of both IL-1 ligands as well as IL-1Rrp2 are increased relative to normal healthy skin. In total, IL-1δ and ε and IL-1Rrp2 may constitute an independent signaling system, analogous to IL-1αβ/receptor agonist and IL-1R1, that is present in epithelial barriers of our body and takes part in local inflammatory responses.
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Cites
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Cited by
Immunological and inflammatory functions of the interleukin-1 family
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Overview of the IL ‐1 family in innate inflammation and acquired immunity
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Cytokines and acute neurodegeneration
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Metadata
- Authors
- Debets, R., Timans, J. C., Homey, B., Zurawski, S., Sana, T. R., Lo, S., Wagner, J., Edwards, G., Clifford, T., Menon, S., Bazan, J. F., & Kastelein, R. A.
- Venue
- The Journal of Immunology
- Publisher
- Oxford University Press (OUP)
- Published
- 2001-08-01
- Volume
- 167
- Issue
- 3
- Pages
- 1440-1446
- ISSN
- 0022-1767 (ISSN-L)
- 1550-6606
- OpenAlex
- W2135491202
- Cited by
- 286
- References
- 51
- FWCI
- 4.48
- Type
- journal article
- Language
- en
- Open access
- closed
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- CoChat. (2026). Citation check: Two Novel IL-1 Family Members, IL-1δ and IL-1ε, Function as an Antagonist and Agonist of NF-κB Activation Through the Orphan IL-1 Receptor-Related Protein 2. https://app.cochat.ai/papers/10.4049/jimmunol.167.3.1440
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- Debets, R., Timans, J. C., Homey, B., Zurawski, S., Sana, T. R., Lo, S., Wagner, J., Edwards, G., Clifford, T., Menon, S., Bazan, J. F., & Kastelein, R. A. (2001). Two Novel IL-1 Family Members, IL-1δ and IL-1ε, Function as an Antagonist and Agonist of NF-κB Activation Through the Orphan IL-1 Receptor-Related Protein 2. The Journal of Immunology. https://doi.org/10.4049/jimmunol.167.3.1440
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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