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Updated: Jan 29, 2026
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Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells
Published on: March 28, 2025
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NKG2D signaling certifies effector CD8 T cells for memory formation.
Cynthia Perez1, Kushal Prajapati1, Brianna Burke1
1Oncology Institute, Cardinal Bernardin Cancer Center, Loyola University Chicago, Maywood, IL, USA.
Journal for Immunotherapy of Cancer
|February 20, 2019
Summary
Natural Killer Group 2D (NKG2D) signaling during CD8 T cell effector response certifies cells for memory. Blocking NKG2D creates defective memory cells, impairing anti-tumor immunity.
Area of Science:
- Immunology
- Cellular Biology
Background:
- Adaptive immunity relies on memory responses for long-term protection.
- CD8 T cells form the memory compartment, crucial for adaptive immunity.
- Natural Killer Group 2D (NKG2D) is proposed to mediate CD8 T cell memory certification.
Purpose of the Study:
- To investigate the role of NKG2D signaling in certifying CD8 T cells for memory formation.
- To determine if NKG2D signaling during the effector phase is essential for functional memory.
Main Methods:
- NKG2D signaling was blocked in vivo during the effector phase using neutralizing antibodies.
- The impact on memory CD8 T cell formation and function was assessed.
- Both polyclonal and monoclonal CD8 T cell repertoires were analyzed.
Main Results:
- Temporary blockade of NKG2D signaling during the effector phase led to defective memory CD8 T cells.
- These 'uncertified' cells showed altered ribosomal protein S6 and epigenetic modifier expression.
- Defective memory cells failed to provide protection against B16 tumor challenge.
Conclusions:
- NKG2D signaling during the effector phase is critical for developing functional memory CD8 T cells.
- This 'certification' process by NKG2D influences T cell translational and epigenetic programming.
- Disruption of NKG2D-mediated certification results in non-protective memory T cells.
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