Beyza Nur ÖZKAN

Mrs. Beyza Nur ÖZKAN

orcid

Research Focus & Metrics

Academic Career Length

5Years (2022-Present)

(Calculated once Scilit publication data is synced: current year − year of first publication + 1)

Representative Publications

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25 June 2024 in Translational Psychiatry
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Journal Article
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BÖBeyza Nur ÖZKAN
Beyza Nur ÖZKAN
KBKübra Bozali
Kübra Bozali
MBMuhammed Emin Boylu
Muhammed Emin Boylu
HVHalil Aziz Velioglu
Halil Aziz Velioglu
SASelman Aktas
Selman Aktas
EGEray Metin Guler
Eray Metin Guler
Major depressive disorder (MDD) is a debilitating illness that includes depressive mood. Repetitive Transcranial Magnetic Stimulation (rTMS) is a therapy method used in the treatment of MDD. The purpose of this study was to assess neurotrophic factors, and oxidative stress levels in MDD patients and evaluate the changes in these parameters as a result of rTMS therapy. Twenty-five patients with MDD and twenty-six healthy volunteers with the same demographic characteristics were included in the study. Brain-derived neurotrophic factors were measured photometrically with commercial kits. Oxidative stress parameters were measured by the photometric method. Oxidative stress index (OSI) and disulfide (DIS) levels were calculated with mathematical formulas. In this study, total antioxidant status (TAS), total thiol (TT), and native thiol (NT) antioxidant parameters and brain-derived neurotrophic factor (BDNF), glial cell line-derived neurotrophic factor (GDNF), and allopregnanolone (ALLO) levels were reduced in pre-rTMS with regard to the healthy control group; TOS, OSI, DIS, and S100 calcium-binding protein B (S100B) levels were increased statistically significantly (p < 0.01). Moreover, owing to TMS treatment; TAS, TT, NT, BDNF, GDNF, and ALLO levels were increased compared to pre-rTMS, while DIS, TOS, OSI, and S100B levels were decreased significantly (p < 0.01). The rTMS treatment reduces oxidative stress and restores thiol-disulfide balance in MDD patients. Additionally, rTMS modulates neurotrophic factors and neuroactive steroids, suggesting its potential as an antidepressant therapy. The changes in the biomarkers evaluated may help determine a more specific approach to treating MDD with rTMS therapy.

17 February 2022 in Clinical and Experimental Hypertension
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Journal Article
Closed access
ABAhmet Belce
Ahmet Belce
BÖBeyza Nur ÖZKAN
Beyza Nur ÖZKAN
FDFatma Sena Dumlu
Fatma Sena Dumlu
BSBehice Hande Sisman
Behice Hande Sisman
EGEray Metin Guler
Eray Metin Guler
Atherosclerosis is a chronic vascular inflammatory disease associated to oxidative stress and endothelial dysfunction. It is characterized by lipid accumulation in the arterial wall, increased hyperlipidemia, oxidative stress, lipid peroxidation, and protein oxidation. Our study included 45 patients ages of 40–60 and 45 healthy volunteers with similar demographic characteristics without any chronic disease as well. Fasting plasma glucose, BUN, creatinine, LDL-cholesterol, HDL-cholesterol, triglyceride, total cholesterol, HbA1c, and C-reactive protein (CRP) levels were measured using commercial kits by autoanalyzer. The oxidative stress biomarkers total oxidant status (TOS), total antioxidant status (TAS), total thiol (TT), native thiol (NT), catalase (CAT), paraoxonase (PON1), and arylesterase (ARES) enzyme activities were measured using photometric methods. The inflammatory biomarkers interleukin 1 beta (IL-1β), tumor necrosis factor-α (TNF-α), presepsin (PSPN), and raftlin (RFTN1) levels were measured with ELISA Kits. Oxidative stress index (OSI) and disulfide (DIS) were calculated. The clinical, biochemical biomarkers such as BUN, creatinine, HDL, LDL, total cholesterol, triglyceride, and CRP levels were found to be higher than the control group and lower post-treatment compared to the pre-treatment group (p <0.001). The oxidative stress parameters, TOS, OSI, and DIS levels were found to be higher than the control group, and the levels before the treatment were statistically significantly higher than after the treatment (p < 0.001). Antioxidant biomarkers TAS, TT, and NT levels were low in the patient group. Inflammatory biomarkers were highest before treatment and decreased with treatment. Oxidative stress and inflammation, which increased in atherosclerosis patients may guide disease prognosis and treatment strategies.

23 February 2024 in Free Radical Research
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Journal Article
Closed access
HBHakan Beyaztas
Hakan Beyaztas
CECevper Ersoz
Cevper Ersoz
BÖBeyza Nur ÖZKAN
Beyza Nur ÖZKAN
IOIbrahim Olgun
Ibrahim Olgun
HPHayati Sencer Polat
Hayati Sencer Polat
EGEray Metin Guler
Eray Metin Guler
IntroductionProstate Cancer (PC) is a global health concern affecting men worldwide. Oxidative stress is believed to contribute to the initiation of early-stage PC lesions. Additionally, inflammation has long been acknowledged as a factor in the development of PC. We aimed to examine the biomarkers of oxidative stress and inflammation in PC patients before and after surgery.Patients and methodsA cross-sectional study was conducted at the Urology Outpatient Clinic of Bezmialem Vakif University Hospital. A total of 150 individuals were included in the study, divided into five groups: 50 Healthy controls, 25 patients with Benign Prostatic Hyperplasia (BPH), 25 patients with Low-Risk Prostate Cancer (LRPC), 25 patients with Medium-Risk Prostate Cancer (MRPC), and 25 patients with High-Risk Prostate Cancer (HRPC). Measurements of Total Oxidant Status (TOS), Total Antioxidant Status (TAS), Total Thiol (TT), and Native Thiol (NT) were performed using photometric methods. Oxidative Stress Index (OSI) and Disulfide (DIS) levels were calculated mathematically. Levels of Interleukin-10 (IL-10), Interleukin-1beta (IL-1 beta), Tumor Necrosis Factor-alpha (TNF-alpha), Interleukin-6 (IL-6), and Presepsin were determined using commercially available enzyme-linked immunosorbent assay (ELISA) kits.ResultsCompared to the healthy control group, the results indicated a statistically significant increase in both oxidative stress and inflammation levels. In the groups receiving both pharmaceutical therapy and surgical treatment (PC), a significant decrease in oxidative stress and inflammation levels was observed.ConclusionConsequently, it is suggested that the assessment of oxidative stress and inflammatory biomarkers should be incorporated in the pre- and postoperative monitoring of patients with PC. Total Antioxidant Status (TAS) levels are found to be statistically lower in all PC groups, indicating a correlation between oxidative stress and the progression of PC.Levels of inflammatory biomarkers (IL-1 beta, IL-6, IL-10, TNF-alpha) were found to be higher before and after surgery in PC groups, and their variation correlated with tumor grade and size.Post-surgery, a decrease in presepsin levels is associated with a reduced likelihood of sepsis in PC patients.Reductions in oxidative stress and inflammation levels postoperatively suggest the effectiveness of surgical intervention in mitigating these factors.The potential for personalized medicine to decrease PC mortality is highlighted by better understanding the functional relationship coordinating inflammatory signatures in the tumor microenvironment.

3 October 2022 in Free Radical Research
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Journal Article
Closed access
CFCem Koray Firat
Cem Koray Firat
BÖBeyza Nur ÖZKAN
Beyza Nur ÖZKAN
EGEray Metin Guler
Eray Metin Guler
Vitamin B12 is involved in biochemical metabolic pathways. B12 deficiency is common in childhood when the need for the vitamin increases and growth and development occur. Various hematological, neu...

29 June 2025 in Food Science & Nutrition
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Journal Article
Open access
MBMahmut Bodur
Mahmut Bodur
NENursena Ersoy‐Söke
Nursena Ersoy‐Söke
EKEmine Karademir
Emine Karademir
BÖBeyza Nur ÖZKAN
Beyza Nur ÖZKAN
AUAslı Uçar
Aslı Uçar
To investigate the relationship between premenstrual syndrome (PMS) prevalence, ultra‐processed food (UPF) consumption, and food cravings in young adult women. A cross‐sectional study was conducted over one menstrual cycle, utilizing the Premenstrual Syndrome Scale to assess PMS symptoms and the Food Craving Questionnaire‐Trait to evaluate food cravings. Dietary data, including UPF consumption, were collected through self‐reported dietary records. The study was carried out among young adult women, focusing on their dietary behaviors and menstrual health. A total of 230 women participated in the study, with a mean age of 20.6 ± 1.8 years. The prevalence of PMS was 61.3% among the participants. Women with PMS reported significantly higher UPF consumption and increased food craving scores compared to those without PMS. UPF energy intake during the menstrual phase was significantly higher in women with PMS (1042.0 ± 30.6 kcal vs. 635.6 ± 41.3 kcal, p < 0.001). Multiple linear regression analysis identified food cravings ( B = 0.468, p < 0.001) and UPF consumption ( B = 0.018, p = 0.022) as significant determinants of PMS scores. Excessive consumption of UPFs and increased food cravings are associated with PMS symptoms. These findings highlight the necessity of considering menstrual‐related variations in dietary interventions, particularly with regard to the consumption of UPF and the management of cravings.

3 November 2023
Verified
Book Chapter
Closed access
EGEray Metin Guler
Eray Metin Guler
SKSumeyye Koc
Sumeyye Koc
FDFatma Sena Dumlu
Fatma Sena Dumlu
HBHakan Beyaztas
Hakan Beyaztas
BÖBeyza Nur ÖZKAN
Beyza Nur ÖZKAN
KBKübra Bozali
Kübra Bozali