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  3. Cnot3 Supports Ilc2 Differentiation And Function By Destabilizing Tbx21 And Rorc Transcripts.
  1. Home
  3. Cnot3 Supports Ilc2 Differentiation And Function By Destabilizing Tbx21 And Rorc Transcripts.

Related Experiment Video

In Vitro Differentiation of Human CD4+FOXP3+ Induced Regulatory T Cells (iTregs) from Na&#239;ve CD4+ T Cells Using a TGF-&#946;-containing Protocol
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Published on: December 30, 2016

CNOT3 supports ILC2 differentiation and function by destabilizing Tbx21 and Rorc transcripts.

Megumi Tatematsu1, Shunsuke Takasuga1, Akane Fuchimukai1

  • 1Department of Microbiology and Immunology, Akita University Graduate School of Medicine, Akita, Japan.

The Journal of Experimental Medicine
|May 12, 2026

View abstract on PubMed

Summary
This summary is machine-generated.

The CCR4-NOT complex subunit CNOT3 is crucial for innate lymphoid cell 2 (ILC2) function. Loss of CNOT3 dysregulates ILC2s, impairing immune responses and promoting type 1 and 3 gene expression.

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Area of Science:

  • Immunology
  • Molecular Biology
  • Cell Biology

Background:

  • Innate lymphoid cells (ILCs) are critical immune cells with distinct subtypes (ILC1, ILC2, ILC3) defined by transcription factors.
  • Posttranscriptional regulation, particularly mRNA decay mediated by the CCR4-NOT complex, is vital for ILC function but remains poorly understood.
  • CNOT3 is an essential subunit of the CCR4-NOT complex involved in mRNA deadenylation.

Purpose of the Study:

  • To investigate the impact of mRNA decay on ILC differentiation and function.
  • To determine the role of CNOT3 in the regulation of ILC2 cells.
  • To elucidate the molecular mechanisms by which CNOT3 controls ILC2 transcriptional programs.

Main Methods:

  • Conditional deletion of the Cnot3 gene in ILC2 cells.
  • Analysis of gene expression, including transcription factors (T-bet, GATA-3, RORγt) and signature genes.
  • Investigation of molecular interactions between CNOT3, Roquin, ZFP36L1, and target mRNAs (Tbx21, Rorc).
  • Assessment of ILC2 function in models of airway allergy and helminth infection.

    • Main Results:

    • Loss of CNOT3 in ILC2 cells resulted in aberrant expression of T-bet and RORγt.
    • CNOT3 deficiency led to the upregulation of type 1 and type 3 signature genes in ILC2s.
    • CNOT3 directly targeted Tbx21 and Rorc mRNAs via Roquin and ZFP36L1, respectively.
    • Elevated T-bet suppressed GATA-3, impairing type 2 immune responses in vivo.
    • CNOT3 deficiency compromised ILC2 function in airway allergy and helminth infection models.

    Conclusions:

    • CNOT3 is essential for maintaining ILC2 cell identity and function.
    • CNOT3 restricts the expression of type 1 (T-bet) and type 3 (RORγt) transcriptional programs in ILC2s.
    • This study reveals a critical role for mRNA decay in regulating ILC subset balance and immune homeostasis.