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Histone deacetylase 3 is required for iNKT cell development.
Puspa Thapa1, Sinibaldo Romero Arocha1, Ji Young Chung1
1Department of Immunology, Mayo Clinic, 200 First Street SW, Rochester, MN, 55905, USA.
Scientific Reports
|July 21, 2017
Summary
Histone deacetylase 3 (Hdac3) is crucial for invariant natural killer T (iNKT) cell development and function. Deleting Hdac3 severely reduces iNKT cell numbers and impairs their differentiation and cytokine production.
Area of Science:
- Immunology
- Cell Biology
- Molecular Biology
Background:
- Invariant natural killer T (iNKT) cells are a unique lymphocyte subset with distinct developmental needs compared to conventional T cells.
- Histone deacetylase 3 (Hdac3) plays a role in cellular processes, but its specific function in iNKT cell biology is not fully understood.
Purpose of the Study:
- To investigate the role of Hdac3 in the development, differentiation, and function of iNKT cells.
- To elucidate the molecular mechanisms underlying Hdac3's influence on iNKT cell biology.
Main Methods:
- Generation of NKT-specific Hdac3-deficient mouse models.
- Flow cytometry analysis to quantify iNKT cell populations and subsets (NKT1, NKT2, NKT17).
- Assessment of cytokine production, cell death, autophagy markers (Cyto-ID, LC3A/B), and nutrient receptor expression (GLUT1, CD71, CD98).
Main Results:
- NKT-specific deletion of Hdac3 led to a significant reduction in iNKT cell numbers, particularly NKT1 cells.
- Hdac3 deficiency resulted in decreased cytokine production in NKT2 and NKT17 cells.
- Hdac3-deficient iNKT cells exhibited increased cell death, reduced autophagy, and lower expression of key nutrient transporters.
Conclusions:
- Hdac3 is essential for the proper development and differentiation of iNKT cells.
- Hdac3 regulates iNKT cell survival, cytokine production, and metabolic adaptation, likely through modulation of autophagy and nutrient uptake.
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