The Impact of Exercise on Natural Killer Cells and Inflammation
A recent study published in the journal Scientific Reports and funded by the FAPESP Foundation has revealed the effects of exercise on natural killer (NK) cells. These are a type of white blood cell that targets infected or damaged cells, including cancerous ones. The study highlights how long-term exercise can enhance the immune system in older adults.
The Importance of Natural Killer Cells
Natural killer cells play a crucial role in the body’s first line of defense against invading microbes. They detect and neutralize disease-causing agents. In this study, samples from nine participants with an average age of 64 were analyzed. They were divided into two groups: one untrained and the other consisting of individuals who have engaged in endurance exercises for many years.
The study found that individuals who practiced endurance exercises for over 20 years had a more prepared immune system. Their natural killer cells performed better in facing inflammatory challenges and used energy more efficiently.
Positive Effects of Exercise on Inflammation
The results showed that regular endurance training helps regulate inflammation in the long term. When comparing the cells of trained older adults with non-athletes of the same age, the trained group had fewer inflammatory markers and more anti-inflammatory markers.
Researchers note that the immune system is influenced by various lifestyle factors such as sleep quality, nutrition, vaccination, stress, and inactivity, as well as some medications that suppress immune activity. However, exercise is a factor that can enhance the immune system.
Changes in Natural Killer Cells
The study examined how NK cells respond to inflammation and metabolize energy. These cells were exposed to pharmacological agents like propranolol and rapamycin to study their effects.
The cells in trained individuals showed greater immune efficiency and adaptability, with better metabolic control and less cellular stress. Regular exercise appears to positively modulate adrenaline sensitivity and cellular energy sensors, promoting a less inflammatory and more balanced response to external stimuli.
Inflammatory Response in Athletes
In another study, researchers compared the immune response between young athletes and veteran athletes before and after an acute exercise session. The results showed that veteran athletes exhibited a more controlled inflammatory response compared to the younger group.
When blood cells were stimulated with a microbe, both groups produced more of the cytokine IL-6, but the increase was more pronounced in the younger group. While the younger group showed a more acute inflammatory response, the older group demonstrated a more organized and controlled response.
Conclusion
The study emphasizes the importance of exercise in enhancing the immune system in older adults, contributing to improved effectiveness of natural killer cells and reduced inflammation. Additionally, the findings suggest that prolonged athletic training can improve immune regulation and reduce the risk of chronic inflammation-related diseases. Understanding how exercise affects the immune system can open new avenues for understanding healthy aging.