Abstract
BACKGROUND: Systemic lupus erythematosus (SLE) disease is characterized by a loss of self-tolerance leading to a local tissue inflammation up to a massive systemic organ-spesific inflammation. Mesenchymal stem cells (MSCs) present immunomodulatory properties to control the over-activating immune responses in SLE through several mechanisms. However, the capability of MSCs to decrease interleukin (IL)-12 production in in vitro remains unclear.
 AIM: The aim of this study was to investigate the role of MSCs in decreasing the level of IL-12 derived from peripheral blood mononuclear cells (PBMCs) of SLE patients.
 METHODS: This study used a post-test control group design using a coculture of PBMCs from SLE and healthy patients with MSCs as the subjects. This study included five groups: sham (Sh), control (C), and treatment groups (T) treated by a co-culture MSCs with PBMCs at ratio dose of 1:1 (T1), 1:25 (T2), and 1:50 (T3), respectively, for 72 hours of incubation. The IL-12 levels was analysed by cytometric bead array (CBA) of flow cytometry.
 RESULTS: This study showed a significant decrease of IL-12 levels (p < 0.05) in T1 and T2 after 72 hours incubation of co-culture MSCs with PBMCs from SLE patient.
 CONCLUSION: MSCs could decrease the level of IL-12 in PBMCs of human SLE to control the inflammation of SLE disease.
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