Related Experiment Video
Updated: Jul 12, 2025
12:08
Retroviral CRISPR/Cas9-Mediated Gene Targeting for the Study of Th17 Differentiation in Vitro
Published on: November 15, 2024
522
Human IL-17A protein production is controlled through a PIP5K1α-dependent translational checkpoint.
Shankar K Revu1, Wenjuan Yang2, Dhivyaa Rajasundaram3
1Division of Rheumatology, Department of Medicine, University of Pittsburgh, Pittsburgh, PA 15261, USA.
Science Signaling
|October 24, 2023
Summary
Researchers discovered a new way to control interleukin-17 (IL-17) protein production in T helper 17 (TH17) cells. This mechanism involves regulating translation, not transcription, offering potential therapeutic targets for autoimmune diseases.
Area of Science:
- Immunology
- Molecular Biology
- Cell Signaling
Background:
- Interleukin-17 (IL-17) is crucial for microbial defense but also drives inflammation and tissue damage in autoimmune diseases.
- Regulation of T helper 17 (TH17) cell differentiation and IL-17 production is vital, with prior understanding focused solely on transcriptional control.
- Phosphatidylinositols, like phosphatidylinositol 4,5-bisphosphate (PIP2), are key signaling molecules in T cell activation.
Purpose of the Study:
- To investigate the role of phosphatidylinositols, specifically PIP2, in the nuclear function of TH17 cells.
- To elucidate the mechanism regulating IL-17A protein production beyond transcriptional control.
- To explore the therapeutic potential of targeting this pathway in conditions like multiple sclerosis.
Main Methods:
- Analysis of nuclear PIP2 enrichment in human TH17, TH1, and TH2 cells.
- Inhibition of the kinase PIP5K1α to assess its impact on IL-17A production.
- Investigation of PIP5K1α interactions with mRNA-binding proteins, including ARS2, and their effect on IL-17A mRNA translation.
Main Results:
- PIP2 was found to be enriched in the nuclei of human TH17 cells, dependent on PIP5K1α activity.
- Inhibition of PIP5K1α impaired IL-17A protein production without affecting IL17A mRNA levels or stability.
- PIP5K1α was shown to interact with ARS2, facilitating the binding of IL17A mRNA and promoting IL-17A protein synthesis.
Conclusions:
- A novel, transcription-independent mechanism regulating IL-17A protein production via translation has been identified.
- Nuclear PIP2 enrichment, mediated by PIP5K1α and ARS2, is critical for IL-17A protein synthesis in TH17 cells.
- This pathway represents a potential therapeutic target for IL-17-mediated autoimmune diseases.
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