A recent study has revealed that certain T-cells, a type of white blood cells, exhibit enhanced functionality following a meal. These T-cells act as a vigilant force within the body, targeting viruses, bacteria, and precancerous cells, according to Greg Delgoffe, an immunologist at the University of Pittsburgh and the UPMC Hillman Cancer Center.
Published in the journal Nature in April, the research indicates that eating plays a crucial role in combating infections. This discovery could aid in enhancing immune therapies and optimizing the timing of vaccinations. Delgoffe, a senior author of the study, likened the situation to Napoleon’s belief that an army marches on its stomach, emphasizing the importance of nourishing the immune system.
To investigate further, researchers collected blood samples from 31 healthy volunteers twice in a single day: once in the morning after fasting overnight and again six hours later post-meal. The study revealed that T-cells exhibited more efficient energy utilization and nutrient absorption after eating, highlighting the significant impact of meals on immune function.
Additional experiments conducted on mice demonstrated that well-fed mice produced a higher number of memory cells, a specialized subset of T-cells that recognize previously encountered pathogens like viruses or bacteria. When a T-cell is activated by a foreign invader, such as a virus, it undergoes rapid growth and division to combat the infection, a metabolically demanding process that contributes to the fatigue experienced during illness.
Although the study did not regulate participants’ diets, the post-meal effects on T-cells remained consistent regardless of the meal content, emphasizing the benefits of a balanced diet. These findings may have implications for improving cancer treatments, particularly chimeric antigen receptor (CAR)-T therapies, which are designed to enhance T-cell recognition of cancer cells. The study observed that T-cells from individuals who had eaten were more effective in controlling cancer compared to those from fasting individuals.
Russell Jones, a metabolism and nutritional programming expert at the Van Andel Institute, highlighted the potential of tailored diet plans to boost immune responses and enhance the effectiveness of existing cancer therapies. The study underscores the intricate relationship between diet, metabolism, and immunity, particularly in the context of cancer treatment. Jones emphasized the importance of maintaining a balanced diet for overall health, whether combating a common cold or battling cancer.
