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ŞAHBAZ, ÇIĞDEM DILEK

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Kurumdan Ayrılmıştır

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ÇIĞDEM DILEK

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ŞAHBAZ

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    Publication
    Is there an association between theory of mind ability and biological rhythm disturbances in individuals with schizophrenia?
    (2018-03-01T00:00:00Z) Sahbaz, C.; Kurtulmus, A.; Kirpinar, I.; ŞAHBAZ, ÇIĞDEM DILEK; KIRPINAR, İSMET
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    Publication
    A role of T cell subsets in the immun dysfunction of schizophrenia
    (2018-03-01T00:00:00Z) Sahbaz, C.; Zibandeh, N.; Kurtulmus, A.; Kirpinar, I.; Sahin, F.; Akkoc, T.; ŞAHBAZ, ÇIĞDEM DILEK; KIRPINAR, İSMET
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    Publication
    Reduced regulatory T cells with increased proinflammatory response in patients with schizophrenia
    (2020-06-01T00:00:00Z) Sahbaz, Cigdem; Zibandey, Noushin; KURTULMUŞ, AYŞE; Duran, Yazgul; Gokalp, Muazzez; KIRPINAR, İSMET; ŞAHİN, FİKRETTİN; Guloksuz, Sinan; AKKOÇ, TUNÇ; ŞAHBAZ, ÇIĞDEM DILEK; KURTULMUŞ, AYŞE; KIRPINAR, İSMET
    Aim To investigate whether circulating T cells including regulatory T cells (Treg) and derived cytokines contribute to the immune imbalance observed in schizophrenia. Methods Forty patients with schizophrenia and 40 age, sex, body mass index, education, and smoking status-matched healthy controls (HC) are included in the study. We stained cells with anti-CD14, anti-CD3, anti-CD4, anti-CD8, anti-CD19, anti-CD20, and anti-CD16/56. Peripheral blood mononuclear cells (PBMCs) were isolated and stained with the human FoxP3 kit containing anti-CD4/anti-CD25 and intracellular anti-Foxp3. PBMCs were cultured for 72 h and stimulated with anti-CD3/anti-CD28. Cytokines (IL-2, IL-4, IL-6, IL-10, IFN-gamma, TNF-alpha, and IL-17A) were measured from the culture supernatant and plasma using the Th1/Th2/Th17 cytokine bead array kit. Results In comparison with HC, Treg percentages in schizophrenia were higher (1.17 +/- 0.63 vs 0.81 +/- 0.53, P = 0.005) in unstimulated but lower in the stimulated condition (0.73 +/- 0.69 vs 0.97 +/- 0.55, P = 0.011). Activated T cell percentages were higher in schizophrenia than HC in unstimulated (2.22 +/- 0.78 vs 1.64 +/- 0.89, P = 0.001) and stimulated (2.25 +/- 1.01 vs 1.72 +/- 1.00, P = 0.010) conditions. The culture supernatant levels of IL-6 (7505.17 +/- 5170.07 vs 1787.81 +/- 1363.32, P < 0.001), IL-17A (191.73 +/- 212.49 vs 46.43 +/- 23.99, P < 0.001), TNF-alpha (1557 +/- 1059.69 vs 426.57 +/- 174.62, P = 0.023), and IFN-gamma (3204.13 +/- 1397.06 vs 447.79 +/- 270.13, P < 0.001); and plasma levels of IL-6 (3.83 +/- 3.41vs 1.89 +/- 1.14, P = 0.003) and IL-17A (1.20 +/- 0.84 vs 0.83 +/- 0.53, P = 0.033) were higher in patients with schizophrenia than HC. Conclusion Our explorative study shows reduced level of Foxp3 expressing Treg in a stimulated condition with induced levels of proinflammatory cytokines in patients with schizophrenia.
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    Chronotype anc Sleep Quality Assessment of Patients with Polycystic Ovary Syndrome
    (2021-01-01T00:00:00Z) GÖKMEN KARASU, AYŞE FİLİZ; Sahbaz, Cigdem Dilek; Dogu, Zeynep Filiz Eren; TAKMAZ, TAHA; ÇALI, HALİME; Tanoglu, Basak; GÖKMEN KARASU, AYŞE FİLİZ; ŞAHBAZ, ÇIĞDEM DILEK; TAKMAZ, TAHA; ÇALI, HALİME
    Aim: Polycystic Ovary Syndrome (PCOS) is the most common endocrine disorder among women during the reproductive ages. The purpose of this study was to investigate the chronotype and sleep quality of PCOS patients.
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    Publication
    Necroptosis Might be a Time Dependent Neuronal Cell Death Mechanism on Hippocampus After Chronic Restraint Stress
    (2019-05-15) Sahbaz, Cigdem; ELİBOL, BİRSEN; ŞAHBAZ, ÇIĞDEM DILEK; ELİBOL, BİRSEN
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    Publication
    Association between emotional functioning and biological rhythm disruptions in patients with schizophrenia
    (2019-11-01) Sahbaz, Çiğdem Dilek; Kurtulmus, Ayse; ŞAHBAZ, ÇIĞDEM DILEK; KURTULMUŞ, AYŞE
    Objective: Dysregulation of biological rhythm is associated with reduced executive functioning and potentiating psychosis, which are essential for the Theory of Mind (ToM) among patients with schizophrenia. However, the association between cognitive dysfunction, emotional information and disruption of biological rhythm remains uncertain. Methods: Forty-one patients with schizophrenia and forty age, gender and smoking status-matched healthy controls were recruited into the study. The Wisconsin Card Sorting Test (WCST), The Stroop test, The Reading the Mind in the Eyes Test (RMET), The Biological Rhythms Interview of Assessment in Neuropsychiatry (BRIAN) were used. Results: BRIAN total, sleep, activity and social scores were higher in patients with schizophrenia than healthy controls. Higher BRIAN score was correlated with lower RMET score; with higher PANSS total, positive and negative scores, and not correlated with executive functions. In the regression analysis, it was observed that gender and increased BRIAN score was independently associated with lower scores for RMET in a patient with schizophrenia. Conclusion: These results suggest that the disruption of biological rhythm might be associated with ToM in patients with schizophrenia. Future research should examine the relationship between biological rhythm and ToM to determine if any causal associations can be identified.
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    Chronotype and Sleep Quality in Patients with Inflammatory Bowel Disease
    (2020-01-01T00:00:00Z) Keskin, Elmas; Sahbaz, Cigdem Dilek; BİBERCİ KESKİN, ELMAS; ŞAHBAZ, ÇIĞDEM DILEK
    Aim: Chronotype and sleep disturbance are both considered risk factors for chronic autoimmune diseases. However, there is lack of knowledge with respect to chronic inflammatory bowel disease and chronotype patterns. Therefore, we investigated the chronotype and sleep quality in patients with ulcerative colitis and Crohn-s disease.
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    Publication
    Prenatal ethanol intoxication and maternal intubation stress alter cell survival and apoptosis in the postnatal development of rat hippocampus.
    (2019-01-01) Sahbaz, CD; Elibol, BİRSEN; Beker, M; Kilic, U; Jakubowska-Doğru, E; ELİBOL, BİRSEN; ŞAHBAZ, ÇIĞDEM DILEK
    It is well known that the fetal ethanol exposure and prenatal stress may have adverse effects on brain development. Interestingly, some morphological and functional recovery from their teratogenic effects that take place during brain maturation. However, mechanisms that underlie this recovery are not fully elucidated. The aim of this study was to examine whether the postnatal attenuation of fetal alcohol - and maternal stress‑induced morphological and functional deficits correlates with compensatory changes in the expression/activation of the brain proteins involved in inflammation, cell survival and apoptosis. In this project, we investigated the hippocampus which belongs to the brain regions most susceptible to the adverse effects of prenatal ethanol exposure. Pregnant rat dams were administered ethanol (A) or isocaloric glucose solution (IC) by a gastric intubation during gestational days 7-20. The pure control group received ad libitum laboratory chow and water with no other treatment. The hippocampi of fetal-ethanol and control pups were examined at the postnatal day (PD)1, PD10, PD30 and PD60. Moderate fetal-ethanol exposure and prenatal intubation stress caused a significant increase in molecular factors relating to inflammation (iNOS) and cell survival/apoptosis pathways (PTEN, GSK-3 and ERK) at birth, with a rapid compensation from these developmental deficits upon removal of alcohol at PD10. Indeed, an increase in ERK1/2 and JNK1/2 activation at PD30 was observed with ethanol consumption. It indicates that the recovery process in A and IC brains started soon after the birth upon the ethanol and stressor withdrawal and continued until the adulthood.
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    Publication
    Evidence for an association of serum melatonin concentrations with recognition and circadian preferences in patients with schizophrenia.
    (2019-06-01) SAHBAZ, C; Özer, OF; KURTULMUS, AYŞE; KıRPıNAR, I; SAHIN, F; GULOKSUZ, S; ŞAHBAZ, ÇIĞDEM DILEK; ÖZER, ÖMER FARUK; KURTULMUŞ, AYŞE; KIRPINAR, İSMET
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    Are chronotype and subjective sleep quality associated with preeclampsia and preterm birth?
    (2020-02-20T04:00:00Z) TAKMAZ, TAHA; Unal, Busra; ÖZCAN, Pınar; ARICI HALICI, BELFİN NUR; Gorchiyeva, Irana; GÖKMEN KARASU, AYŞE FİLİZ; Sahbaz, Cigdem; TAKMAZ, TAHA; ÖZCAN, PINAR; ARICI HALICI, BELFİN NUR; GÖKMEN KARASU, AYŞE FİLİZ; ŞAHBAZ, ÇIĞDEM DILEK
    The physiological and physical changes in pregnancy affect the sleep-wake cycle. Limited data exist to evaluate the effect of sleep quality and chronotype during pregnancy on adverse pregnancy outcomes. It is hypothesized that there could be a tendency for the evening chronotype and sleep disturbances to lead to the development of preeclampsia and preterm birth. A total of 313 pregnant women were included. Women were divided into three groups: Group A (control - problem-free), Group B (preeclampsia) and Group C (preterm birth). There were significant differences in the mean PSQI score between the groups (A vs C and A vs B) (p < 0.01). Women in the preterm and the preeclampsia groups reported significantly worse sleep quality. There was a significant difference in the mean MEQ scores between groups (A vs C and A vs B) (p < 0.01). The ratio of the evening-types was significantly higher for the preterm and preeclampsia groups (p < 0.01). Multivariate logistic regression analysis revealed that there is a negative association between preeclampsia/preterm birth and MEQ score, positive association between preeclampsia/preterm birth and PSQI score. Chronotype and sleep quality measurements could provide a simple and feasible way in the prediction of adverse pregnancy outcomes.