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T cells display mitochondria hyperpolarization in human type 1 diabetes
Jing Chen1, Anna V Chernatynskaya2, Jian-Wei Li2,3
1Department of Pathology, Immunology, and Laboratory Medicine, University of Florida, Gainesville, FL, USA. jic24@pathology.ufl.edu.
Scientific Reports
|September 9, 2017
Summary
T cells from type 1 diabetes patients show mitochondrial dysfunction, characterized by inner-membrane hyperpolarization and altered ATP and IFNγ production, impacting T cell bioenergetics and function.
Area of Science:
- Immunology
- Metabolic disorders
- Cellular biology
Background:
- T lymphocytes are key players in type 1 diabetes pathogenesis.
- Mitochondrial function is crucial for T cell regulation but poorly understood in type 1 diabetes.
Purpose of the Study:
- To investigate T cell metabolism and mitochondrial function in human type 1 diabetes.
- To identify specific mitochondrial alterations in T cells from type 1 diabetes patients.
Main Methods:
- Analysis of T cells from two independent patient cohorts.
- Assessment of mitochondrial inner-membrane potential, ATP levels, and IFNγ production.
- Evaluation of reactive oxygen species (ROS) generation.
Main Results:
- T cells from type 1 diabetes patients displayed mitochondrial inner-membrane hyperpolarization (MHP).
- MHP was observed across T cell subsets and was not linked to diabetes duration or glycemic control.
- Elevated MHP correlated with increased IFNγ production and ROS generation, alongside reduced ATP levels.
Conclusions:
- Type 1 diabetes is associated with intrinsic mitochondrial dysfunction in T cells.
- This dysfunction affects cellular ATP and IFNγ production, linked to ROS generation.
- These mitochondrial alterations impact T cell bioenergetics and function in type 1 diabetes.
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