Immunometabolism Explained | The Interaction Between Metabolism and the Immune System
Introduction
The immune system continually protects the body against pathogens and helps clear damaged tissue. For a long time, metabolism was thought to play only a supporting role in immune cells. It is now clear that metabolism is actually an important factor determining how immune cells respond.
This field of research is known as immunometabolism. It examines how metabolic processes, such as glucose metabolism, fatty acid oxidation, and mitochondrial energy production, influence the behavior of immune cells.
What is immunometabolism?
Immunometabolism describes the reciprocal relationship between:
- a cell's metabolism;
- the function of the immune system.
An immune cell must continually adapt its energy supply to its function. A resting cell has a different metabolic profile from an activated cell that must divide rapidly or produce inflammatory mediators.
The role of mitochondria
Mitochondria not only provide ATP but also produce signaling molecules that can influence immune responses.
They are involved in:
- energy production;
- calcium regulation;
- production of reactive oxygen species (ROS);
- regulation of apoptosis;
- metabolic adaptation during immune activation.
This makes mitochondria an important link between metabolism and immunity.
Different immune cells use different energy sources
Not every immune cell uses the same metabolic strategy.
Activated macrophages
During an acute inflammatory response, macrophages largely switch to:
- glycolysis;
- rapid ATP production;
- increased glucose consumption.
This enables them to respond quickly to infections or tissue damage.
Regulatory immune cells
Other immune cells, including regulatory T cells (Tregs), rely more on:
- fatty acid oxidation;
- oxidative phosphorylation;
- efficient mitochondrial energy production.
This metabolic pathway supports long-term cell function.
Mitochondrial signaling
In addition to ATP, mitochondria also produce signaling molecules that influence cellular processes.
Examples include:
- reactive oxygen species (ROS);
- metabolites from the citric acid cycle;
- changes in NAD+/NADH ratios.
These signals can influence gene expression and the activity of immune cells.
Immunometabolism and inflammation
Researchers study how changes in the metabolism of immune cells are associated with various inflammatory processes.
This includes examining:
- energy supply;
- mitochondrial function;
- oxidative stress;
- metabolic flexibility;
- communication between immune cells.
The goal is to better understand how metabolic processes contribute to a balanced immune response.
Lifestyle and immunometabolism
Various lifestyle factors influence both metabolism and the immune system.
Research focuses, among other things, on:
- regular physical activity;
- sleep quality;
- dietary patterns;
- body weight;
- insulin sensitivity;
- mitochondrial health.
These factors can change the metabolic state of immune cells and are therefore being extensively studied.
Immunometabolism in scientific research
Immunometabolism has developed into an important research area within:
- immunology;
- oncology;
- endocrinology;
- cardiometabolic research;
- aging research.
Scientists are investigating how mitochondrial function, NAD+ metabolism, AMPK, mTOR, and other metabolic pathways influence immune cell activity. Much of the knowledge comes from basic and preclinical research; further clinical studies are needed to establish its significance for healthcare.
Relationship with mitochondrial health
A well-functioning mitochondrial network supports:
- efficient ATP production;
- metabolic flexibility;
- controlled ROS production;
- calcium homeostasis;
- cellular quality control.
Therefore, immunometabolism is often studied in conjunction with mitochondrial biology.
Summary
Immunometabolism examines how metabolism and immune function influence each other. Mitochondria play a central role by providing energy and emitting signals that help immune cells adapt to changing conditions. Thanks to rapid developments in this field, there is growing insight into the close collaboration between metabolism, mitochondrial health, and the immune system.
Scientific references
- Janeway's Immunobiology
- Lehninger Principles of Biochemistry
- Molecular Biology of the Cell
- O'Neill LAJ, Kishton RJ, Rathmell J. (2016). A Guide to Immunometabolism for Immunologists.
- Buck MD et al. (2017). Metabolic Instruction of Immunity.
Internal links
- Mitochondrial biogenesis
- Mitochondrial fusion and fission
- Mitochondrial DNA
- Oxidative stress
- ATP production
- Metabolic flexibility
Related Peptidera products (research)
- SS-31
- MOTS-c
- NAD+
- GHK-Cu
- KPV
Related research products
View product specifications and available batch documentation. The studies discussed were not conducted with Peptidera products and do not prove the efficacy of our products. For laboratory research only; not for human or animal consumption.