Irtegun-Kandemir, SevgiIcen-Taskin, IrmakBozkurt, MehtapKalkanli-Tas, Sevgi2024-04-242024-04-2420191871-53032212-3873https://doi.org/10.2174/1871530319666190119101756https://hdl.handle.net/11468/18839Background: Behcet's Disease (BD) is a multisystemic inflammatory disorder affecting large vessels, lungs joints, gastrointestinal and neurological systems. The pathogenesis of BD remains poorly understood. Identifying the key signaling pathway is crucial for a complete understanding of the pathogenesis of BD. Objective: The aim of this study was to determine mRNA expression level of Src family kinases (SFKs) members and their involvement in lipopolysaccharide (LPS)-induced mitogen-activated protein kinases (MAPKs) regulation in peripheral blood mononuclear cells (PBMCs) of active BD patients. Methods: Twenty- five active BD patients and twenty-five healthy controls were included in the study. PBMCs were isolated from total blood by density gradient centrifugation. The mRNA expression levels of SFKs members were measured by real-time quantitative PCR (RT-qPCR). The effect of SFKs activity on LPS-induced activation MAPKs (Erk1/2, p38 and JNK) was examined by Western blot. Results: The mRNA expression levels of Hck, Src, Lyn, Yes and Fyn were found to be slightly decreased in active BD patients compared to the control subjects, but a slight change in mRNA level of SFKs members did not impact on protein levels and protein activity. LPS-induced Erk1/2 phosphorylation was significantly increased in the absence of SFKs activity in active BD patients. However, inhibition of SFKs activity had no effect on LPS-induced phosphorylation of p38 and JNK in both controls and active BD patients. Conclusion: SFKs downregulate LPS-induced Erk1/2 phosphorylation in PBMCs of active BD patients.eninfo:eu-repo/semantics/closedAccessBehcet's DiseaseLpsMitogen-Activated Protein KinaseSrc Family KinasesPbmcsTlr4Article196809817WOS:0004843714000102-s2.0-850723120343065955410.2174/1871530319666190119101756N/AQ3