Dental follicle mesenchymal stem cells regulate responses in sepsis

Objective: Sepsis-induced immune alterations are associated with secondary infections and increased risk of death. The use of mesenchymal stem cells (MSCs) has been described as a novel therapeutic strategy. We evaluated the immunomodulatory effects of human dental follicle (DF-MSCs) on lymphocytes of sepsis and septic shock patients. Materials and Methods: Peripheral blood mononuclear cells (PBMCs) were isolated from venous blood samples of sepsis, septic shock and healthy subjects. PBMCs were co-cultured in the presence and absence of DF-MSCs with or without interferon-gamma (IFN-γ) for 72 hours. CD4+CD25+FoxP3+regulatory T (Treg) cell frequency, lymphocyte proliferation, cytokine levels and apoptosis were evaluated via flow cytometry. Results: DF-MSCs significantly suppressed proliferation of lymphocytes in sepsis group compared to septic shock group (p