Published on: Mar 06, 2026
Scientists have found that the ratio between polyunsaturated fatty acids (PUFAs) and monounsaturated fatty acids (MUFAs) can significantly influence T-cell survival and immune responses. Research published in Nature shows that high PUFA levels make T cells more vulnerable to ferroptosis, an iron-dependent form of cell death caused by the oxidation of lipids in cell membranes.
In experiments with mice fed diets containing different PUFA/MUFA ratios, T cells from animals on high-PUFA diets were much more sensitive to ferroptosis, while those on lower-ratio diets were more resistant and maintained stronger immune function. These differences also affected immune responses, including antibody production and anti-tumor activity.
Further studies in humans confirmed similar patterns, showing that lipid composition in blood cells correlated with T-cell susceptibility to oxidative stress, regardless of body mass index. The findings suggest that the types of fats consumed in the diet directly influence the lipid composition of T-cell membranes, shaping how effectively these immune cells function.
Overall, the study highlights that dietary fat composition can play a critical role in regulating immune performance, with potential implications for improving vaccine effectiveness, cancer immunotherapy, and overall immune health.
Source: https://lifespan.io/news/fat-composition-affects-t-cell-mediated-immunity/
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