Vitamin D Enhances Proliferation of Activated CD4+ T Cells via Increased Glutaminolysis
Overview
This study demonstrates that vitamin D (VitD) enhances the proliferation of activated CD4+ T cells through increased glutaminolysis, despite reduced glucose uptake. The findings suggest a metabolic shift that supports T cell expansion independent of traditional glycolytic pathways.
Background
Vitamin D is crucial for immune regulation, particularly in T cell function, where it modulates metabolic pathways during activation. Understanding how VitD influences T cell metabolism is essential for developing therapeutic strategies in immune-related conditions. This study highlights the role of glutaminolysis as a key metabolic pathway in T cell proliferation under VitD influence.
Proteomic analysis showed elevated expression of glutaminase and glutamate dehydrogenase in VitD-treated cells.
Inhibition of VDR, glutamine uptake, or glutaminase activity significantly reduced T cell expansion.
VitD promotes a metabolically restrained but adaptive proliferative state in T cells.
Supplementation with glutamine restored cell expansion in prolonged cultures with VitD.
Clinical Implications
Clinicians should consider the role of vitamin D in modulating T cell metabolism, particularly in conditions requiring enhanced immune responses. The findings suggest that glutamine supplementation may be beneficial in optimizing T cell proliferation during vitamin D therapy.
Conclusion
This research underscores the importance of glutaminolysis in supporting CD4+ T cell expansion under vitamin D influence, offering insights into potential therapeutic strategies for enhancing immune function.
by Agustín A. Vera, Mauricio Hernandez, Ricardo A. Cartes, Faryd Llerena, Solange E. Cisterna, Romina A. Quiroga, Sergio A. Sanhueza, Camila P. Muñoz-Grez, Francisco Vergara, Daniel Moena, Pablo A. Alarcón, Rafael Burgos, Coralia I. Rivas, Elena Uribe, Rafael J. Argüello, Cristopher Almarza, Felix A. Urra, Francisco Tapia-Belmonte, Luciano Ferrada, Liliana I. Lamperti, Estefanía Nova-Lamperti
A Beyond the Guidelines discussion highlighted uncertainty around gastrointestinal evaluation and intravenous iron use in premenopausal women with iron deficiency.
