Effects of different media on human T regulatory cells phenotype

Abstract

Background/Aim: Functional and quantitative Treg cell defects have been identified in a variety of autoimmune diseases. Therefore, Tregs are a major pharmaceutical target for these disorders. In the last decades, studies have been mainly focused on the identification and experimental understanding of the activity of Tregs and their mechanisms of action. Materials and methods: This study describes how overnight storage of isolated peripheral blood mononuclear cells in different media (PBS pH 7.3, PBS pH 7.3 containing 0.5% BSA, RPMI 1640 and RPMI 1640 containing 10% FBS) affects the viability and expression of the commonly used markers for Tregs identification: CD25, CD127, CTLA-4, GITR, PD-1, FoxP3 and Helios. Results: Incorrectly selected storage conditions (temperature, time, medium) may affect the expression of surface and intracellular markers, thus, compromising the quality of the obtained results. Conclusion: Appropriate protocols of cell isolation and storage are important for providing appropriate conditions for cell growth. This is crucial when analyzing small cell populations like Tregs.