Human interferon-gamma (IFN-gamma) containing cells bear various surface phenotypic markers

Area of Science:

• Immunology
• Cell Biology

Background:

• Interferon-gamma (IFN-gamma) is a crucial cytokine in immune responses.
• Understanding the cellular sources and phenotypes of IFN-gamma production is vital for иммуномодуляции.

Purpose of the Study:

• To identify the cell surface phenotypic markers of Interferon-gamma (IFN-gamma) producing cells.
• To characterize the heterogeneity of IFN-gamma containing cells.

Main Methods:

• Defined IFN-gamma containing cells as plaque-forming cells (PFC).
• Utilized two-color flow cytometry (FACS IV) to analyze cell surface markers.
• Investigated the role of plastic-adherent cells and cyclosporin A (CyA) in IFN-gamma production.

Main Results:

• IFN-gamma containing cells comprised two fractions: OKT3+, OKT4+, OKT8- cells and OKM1+ cells.
• Concanavalin A (Con A)-stimulated IFN-gamma cells predominantly expressed Leu3, Leu8, Leu15, HLA-DR, and IL-2 receptors, while lacking Leu2 and Leu7.
• Helper T cells (OKT4+) were identified as the predominant IFN-gamma producing cell type.
• OK432, glycyrrhizin, and CCA (lobenzarit disodium) were found to increase IFN-gamma containing cell numbers.

Conclusions:

• IFN-gamma producing cells are phenotypically diverse, with helper T cells being the major subset.
• Plastic-adherent cells (monocytes) and absence of Cyclosporin A are important for IFN-gamma generation.
• OK432, glycyrrhizin, and CCA act as potential immunomodulators by enhancing IFN-gamma production.