Related Experiment Video
Updated: Jun 22, 2025
06:07
Measuring Mitochondrial Function of Naïve and Effector CD8 T Cells
Published on: March 28, 2025
239
Moderate-intensity aerobic exercise training improves CD8+ tumor-infiltrating lymphocytes effector function by
Vanessa Azevedo Voltarelli1,2,3, Mariane Tami Amano1, Gabriel Cardial Tobias2,4
1Molecular Oncology Center, Sírio-Libanês Hospital, São Paulo, SP, Brazil.
Iscience
|July 3, 2024
Summary
Aerobic exercise training (AET) can reduce cancer mortality by enhancing anti-tumor immune responses. This study shows AET improves mitochondrial function in tumor-infiltrating lymphocytes, boosting their cancer-fighting capabilities.
Area of Science:
- Immunology
- Exercise Physiology
- Cancer Biology
Background:
- Tumor growth is associated with an immunosuppressive microenvironment and impaired T cell function, often linked to mitochondrial dysfunction.
- Aerobic exercise training (AET) is known to improve mitochondrial health, but its direct impact on tumor-infiltrating lymphocytes (TILs) remains unclear.
Purpose of the Study:
- To investigate the effects of AET on mitochondrial metabolism within TILs.
- To determine if AET modulates TIL function and impacts tumor development.
Main Methods:
- Mice underwent treadmill AET before and during tumor cell inoculation.
- Evaluated tumor growth, survival, tissue hypoxia, TIL infiltration, and TIL mitochondrial content, morphology, and function.
Main Results:
- AET significantly reduced tumor growth, decreased tumor hypoxia, and improved survival rates.
- AET increased CD8+ TIL infiltration and enhanced their production of IFN-γ and ATP.
- These improvements in TIL function correlated with reduced mitochondrial loss in CD8+ TILs.
Conclusions:
- AET exerts anti-tumor effects, partly by enhancing CD8+ TIL effector function.
- Improved mitochondrial content and function in TILs are key mechanisms by which AET combats tumor growth.
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