Resveratrol, EGCG and Vitamins Modulate Activated T Lymphocytes

Area of Science:

• Immunology
• Nutritional Science
• Molecular Biology

Background:

• Vitamins and bioactives are crucial dietary components influencing immune cell function.
• T lymphocytes play a central role in adaptive immunity, regulating inflammation and autoimmunity.
• Understanding the impact of specific vitamins and bioactives on T cell responses is vital for immune health.

Purpose of the Study:

• To investigate the effects of vitamin A (VA), vitamin D (VD), vitamin E (VE), resveratrol (Res), and epigallocatechin-3-gallate (EGCG) on adaptive immune responses.
• To analyze the synergistic or antagonistic interactions between these compounds.
• To determine their influence on T lymphocyte proliferation, differentiation, and cytokine production.

Main Methods:

• T lymphocytes from healthy individuals were activated in vitro using anti-CD3/CD28 antibodies.
• Cells were treated with various vitamins and bioactives (Res, EGCG).
• Analysis included cytofluorometry for cell surface markers, ELISA for cytokine/chemokine levels, and RT-PCR for gene expression.

Main Results:

• Resveratrol and EGCG increased CD4+ T cell surface intensity and modulated CD8+ T cell proportions.
• Vitamin D significantly enhanced T helper 2 (Th2) cytokine production (IL-5, IL-13).
• Resveratrol and EGCG promoted T helper 1 (Th1) cytokine secretion (IL-2, INF-γ), with VD dominating interactions.

Conclusions:

• Vitamin D strongly modulates cytokine production, favoring Th2 immune functions.
• Resveratrol and EGCG promote Th1 immune responses.
• These findings suggest that dietary bioactives and vitamins can interact to shape the adaptive immune response in vivo.