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Updated: May 27, 2025

Isolation and Th17 Differentiation of Naïve CD4 T Lymphocytes
Published on: September 26, 2013
K27-linked RORγt ubiquitination by Nedd4 potentiates Th17-mediated autoimmunity.
Qiuming Zeng1,2,3,4,5, Hui Guo6,7, Na Tang8,9
1Department of Neurology, Xiangya Hospital, Central South University, Changsha, Hunan, 410008, People's Republic of China. zengqiuming1983@csu.edu.cn.
Nedd4 deficiency impairs T helper 17 (Th17) cell responses and autoimmune disease development. Nedd4 targets RORγt for ubiquitination, regulating Th17 cell differentiation and offering therapeutic potential for autoimmune conditions.
Area of Science:
- Immunology
- Molecular Biology
- Autoimmunity
Background:
- The role of Nedd4 in T helper (Th) cell differentiation and autoimmunity remains unclear.
- Th17 cells are implicated in autoimmune disease pathogenesis.
- Regulation of RORγt activation in Th17 differentiation needs further elucidation.
Purpose of the Study:
- To investigate the role of Nedd4 in Th17 cell differentiation and Th17-mediated autoimmunity.
- To elucidate the molecular mechanism of Nedd4 in regulating RORγt activity.
Main Methods:
- Flow cytometry and siRNA transfection to assess Nedd4's impact on T cell development and differentiation.
- Experimental autoimmune encephalomyelitis (EAE) model to study Th17-mediated autoimmunity.
- Immunoprecipitation, mass spectrometry, and lentiviral transduction to determine Nedd4-RORγt interaction and ubiquitination.
Main Results:
- Nedd4 deficiency impairs pathogenic and non-pathogenic Th17 responses and EAE development.
- Nedd4 directly binds to RORγt via the PPLY motif.
- Nedd4 targets RORγt for K27-linked polyubiquitination at K112, enhancing RORγt activity.
Conclusions:
- Nedd4 is a critical E3 ubiquitin ligase for RORγt in regulating Th17 cell development.
- Nedd4-mediated regulation of RORγt offers potential therapeutic strategies for Th17-mediated autoimmune diseases.
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