Researchers have discovered that certain T-cells, a type of white blood cell, exhibit enhanced functionality after a meal. Described as a microscopic army, these T-cells are vigilant in eliminating viruses, bacteria, or potentially cancerous tissue from the body, as explained by Greg Delgoffe, an immunologist at the University of Pittsburgh and UPMC Hillman Cancer Center.
Published in the journal Nature in April, the study indicates that nutrition plays a crucial role in combating infections, offering insights that could aid in enhancing immune therapies and optimizing vaccination timing. Delgoffe, a senior study author, likened the situation to Napoleon’s famous quote about an army marching on its stomach, emphasizing the importance of nourishing the immune system.
Through blood samples collected from 31 healthy individuals, researchers observed that T-cells exhibited improved performance after a meal compared to when fasting. Following a meal, T-cells displayed increased uptake of fats and sugars, along with more efficient energy production by mitochondria, showcasing the significant impact of nutrition. Additional experiments in mice revealed that fed mice generated more memory cells, a specialized subset of T-cells recognizing previously encountered pathogens like viruses or bacteria.
Upon encountering a foreign invader, such as a virus or bacteria, activated T-cells undergo rapid growth and division to form a widespread defense mechanism in the body, which can lead to fatigue during illness due to the high metabolic demands. Despite not controlling participants’ diets, the study noted consistent post-meal effects on T-cells, with a balanced diet yielding the most significant benefits.
The study’s implications extend to potential enhancements in cancer treatments, particularly in therapies like chimeric antigen receptor (CAR)-T treatments. These therapies modify T-cell receptors to better target threats like cancer cells. The study demonstrated 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 Van Andel Institute, emphasized the potential for tailored diet plans to amplify the immune system and improve the efficacy of existing cancer treatments. The research underscores the intricate interplay between diet, metabolism, and immunity, notably in the context of cancer, highlighting the fundamental importance of a balanced diet for overall health, whether combating a cold or cancer.