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    mRNA Expression Profile of SFKs and Involvement of SFKs in the Regulation of LPS-Induced Erk1/2 Signaling in PBMCs of Active BD Patients
    (Bentham Science Publ Ltd, 2019) Irtegun-Kandemir, Sevgi; Icen-Taskin, Irmak; Bozkurt, Mehtap; Kalkanli-Tas, Sevgi
    Background: 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.
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    Pharmacological Inactivation of Src Family Kinases Inhibits LPS-Induced TNF-? Production in PBMC of Patients with Behcet's Disease
    (Hindawi Ltd, 2016) Irtegun, Sevgi; Pektanc, Gulsum; Akkurt, Zeynep M.; Bozkurt, Mehtap; Turkcu, Fatih M.; Kalkanli-Tas, Sevgi
    Behcet's disease (BD) is a multisystemic chronic inflammatory disease characterized by relapsing oral and genital ulcers, uveitis, and skin lesions. The pathogenesis of BD is still unknown. Aberrant production of some cytokines/chemokines plays an important role in the pathogenesis of various inflammatory diseases. Revealing a key signaling regulatory mechanism involved in proinflammatory cytokines/chemokines production is critical for understanding of the pathogenesis of BD. The aim of this study was to determine the role of Src family kinases (SFKs) in production of some LPS-induced proinflammatory cytokines/chemokines in peripheral blood mononuclear cells (PBMC) of active BD patients. Chemical inhibition of SFKs activity impaired LPS-induced TNF-alpha production in PBMC of active BD patients, suggesting that modulating SFKs activity may be a potential target for BD treatment.
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    Öğe
    RECURRENT MISCARRIAGES IN A COUPLE WITH T(4,8) AND INV (9)
    (John Wiley & Sons Inc, 2009) Oral, Diclehan; Kalkanli-Tas, Sevgi; Fidanboy, Mehmet; Turkyilmaz, Aysegul; Budak, Turgay
    [Abstract Not Available]