Yazar "Dogan, Serdar" seçeneğine göre listele
Listeleniyor 1 - 20 / 25
Sayfa Başına Sonuç
Sıralama seçenekleri
Öğe Alginate modified collagen for rapid, durable and effective biosorption of Pb (II) ions from an aqueous solution(Elsevier, 2023) Ugurlu, Erkan; Duysak, Onder; Kardas, Gulfeza; Sayin, Selin; Saygili, Eyup Ilker; Dogan, SerdarThe aim of this study is to define the biosorption properties of Alginate, AC1 and AC2 beads composed of collagen obtained from sea urchin Diadema setosum and alginate obtained from Sargassum vulgare, for Pb (II) from aqueous solutions. Raw alginate beads (A), 2:1 alginate-modified-collagen beads (AC1), and 3:1 alginate-modified collagen beads (AC2) were successfully synthesized, characterized, and removal capacity of Pb (II) in aqueous solutions studied. The biosorption of Pb (II) ions by the synthesized beads was studied and the effect of parameters such as initial concentration, contact time, and solution pH on the biosorption of Pb (II) ions was investigated. Langmuir isotherm model provides satisfactory estimations of homogeneous monolayer biosorption capacity, the highest Pb (II) determined values being 248.76 mg/g for Alginate beads, 344.83 mg/g for AC1 beads, and 303.03 mg/g for AC2 beads. Moreover, AC1 beads were determined to be homogeneous monolayer and multilayer at two different stages. In the former stage, Pb (II) were quickly diffused to the outer surface of absorbent, and in the latter stage, ions were slowly biosorbed to the inner surface. The results obtained in this study showed that Alginate, AC1 and AC2 beads can be used effectively to remove Pb (II) ions from aqueous solutions. Another finding from this study was that the AC1 beads did not disintegration and significantly swelled in size relative to the other beads. Another important finding of this study was that AC1 beads were not deformed and increased in size.& COPY; 2023 Elsevier B.V. All rights reserved.Öğe Association of miR-21-5p with routine biochemical markers and inflammatory cytokines in hemodialysis patients(Elsevier, 2023) Okuyan, Hamza Malik; Terzi, Menderes Yusuf; Dogan, Serdar; Emir, Tuerkan; Turgut, Faruk HilmiBackground: Although the role of miR-21-5p in some kidney diseases is relatively documented, the relationship of miR-21-5p with markers of bone metabolism and inflammation in patients receiving hemodialysis (HD) remains unclear. Here, we aim to explore the relationship of miR-21-5p with routine biochemical parameters, mineral bone disorders, and inflammatory markers in HD patients. Methods: Serum miR-21-5p expressions from 60 HD patients and 20 healthy controls were analyzed with qPCR. Bone metabolism-related parameters such as receptor activator of nuclear factor-kappa B ligand (RANKL), osteocalcin, calcium, phosphorus, and parathormone; inflammation-related markers such as tumor necrosis factor-alpha (TNF-& alpha;), interleukin (IL)-6, IL-10, and C-reactive protein (CRP); and oxidative stress markers such as total antioxidant status (TAS) and total oxidant status (TOS) were measured in serum samples of HD patients. Results: We showed for the first time that miR-21-5p expressions were increased in patients receiving HD. In addition, miR-21-5p expressions showed a significantly positive correlation with bone metabolism markers, i.e. RANKL, osteocalcin, phosphorus, and parathormone, and inflammation markers, i.e. TNF-& alpha;, IL-6, and CRP. We detected that areas under the receiver operating characteristic curve for miR-21-5p, RANKL, osteocalcin, TNF-a, IL-6, and oxidative stress index in HD patients were 0.9317, 0.7742, 0.9038, 0.7319, 0.7063, and 0.7738, respectively. Conclusion: Elevated miR-21-5p expressions are associated with routine biochemical and inflammatory markers in HD patients, suggesting that miR-21-5p might have diagnostic and/or therapeutic importance in the treatment of chronic kidney diseases.Öğe Association of serum lncRNA H19 expression with inflammatory and oxidative stress markers and routine biochemical parameters in chronic kidney disease(Springer, 2021) Okuyan, Hamza Malik; Dogan, Serdar; Terzi, Menderes Yusuf; Begen, Mehmet A.; Turgut, Faruk HilmiBackground Chronic kidney disease (CKD) is a disorder that affects millions worldwide, and current treatment options aiming at inhibiting the progression of kidney damage are limited. Long noncoding RNA (lncRNA) H19 is one of the first explored lncRNAs and its deregulation is associated with renal pathologies, such as renal cell injury and nephrotic syndrome. However, there is still no research investigating the connection between serum lncRNA H19 expressions and clinical outcomes in CKD patients. Therefore, we investigated the relation of serum lncRNA H19 expressions with routine biochemical parameters, inflammatory cytokines, oxidative stress and mineralization markers in advanced CKD patients. Methods lncRNA H19 serum levels from 56 CKD patients and 20 healthy controls were analyzed with reverse-transcription quantitative polymerase chain reaction method. Serum tumor necrosis factor-alpha (TNF-alpha), interleukin 6 (IL-6), and osteocalcin (OC) levels were measured with enzyme linked-immunosorbent assay. Total antioxidant status (TAS) and total oxidative status (TOS) levels were evaluated by the routine measurement method. Results We found that lncRNA H19 expressions were upregulated in patients with CKD compared to the controls. Furthermore, lncRNA H19 relative expression levels showed a negative relationship with glomerular filtration rate (GFR) while it was positively correlated with ferritin, phosphorus, parathyroid hormone, TNF-alpha, IL-6, OC, TAS and TOS levels. Conclusion lncRNA H19 expressions were increased in CKD stage 3-5 and HD patients, and elevated lncRNA H19 expressions were associated with decreased glomerular filtration rate, inflammation, and mineralization markers in these patients.Öğe Associations between the expression of mucins (MUC1, MUC2, MUC5AC and MUC6) and clinicopathologic parameters of human breast carcinomas(Wolters Kluwer Medknow Publications, 2020) Oral, Onur; Unverdi, Hatice; Kumcu, Emrah; Turkbey, Duygu; Dogan, Serdar; Hucumenoglu, SemaAims: The aim of this study is to evaluate the relationships between the expression of mucins in invasive breast carcinomas and clinicopathologic parameters. Materials and Methods: We examined 150 cases of invasive breast carcinoma, using the 2012 World Health Organization (WHO) classification of the tumors of the breast. We studied the expression of MUC1, MUC2, MUC5AC, and MUC6 by immunohistochemistry. We also evaluated normal breast tissue and ductal carcinoma in situ (DCIS) lesions in nearby invasive tumor areas. Results: In invasive breast carcinomas, MUC1, MUC2, MUC5AC, and MUC6 were expressed in 98.6%, 11.3%, 9.9, and 8.5% of cases, respectively. MUC2, MUC5AC, and MUC6 were overexpressed in invasive tumors and DCIS lesions were compared with normal breast tissue. The apical pattern of MUC1 was correlated with low grade and ER expression. MUC2 was correlated with mucinous carcinoma and an inverse association with invasive ductal carcinoma, not otherwise specified (NOS). MUC6 expression was associated with lymphovascular invasion. Conclusions: Most invasive breast tumors express MUC1 and the apical pattern of MUC1 is correlated with low grade and ER expression. MUC6 expression is associated with indicators of poor prognosis. Further comprehensive studies need to evaluate the role of mucins as a potential biomarker and to be used as a specific therapeutic target against breast cancer.Öğe Beclin-1, an autophagy-related protein, is associated with the disease severity of COVID-19(Pergamon-Elsevier Science Ltd, 2021) Okuyan, Hamza Malik; Dogan, Serdar; Bal, Tayibe; Cabalak, MehmetAims: Coronavirus disease 2019 (COVID-19), which is a highly contagious disease, is an ongoing outbreak worldwide with high morbidity and mortality. The approaches targeting the autophagy processes might have promising diagnostic and therapeutic values against Coronavirus infection. Here, we aimed to investigate the relationship of Beclin-1 (BECN1), an autophagy-related protein, with blood parameters and the clinical severity in patients with COVID-19. Materials and methods: We enrolled 108 patients with COVID-19 and 21 healthy controls in this study, from September 2020 to January 2021 and divided all patients into two groups according to the severity of the disease: The non-severe group and the severe group. BECN1 levels and blood parameters were measured with Enzyme-Linked Absorbent Assay and routine techniques, respectively. Key findings: Serum BECN1 levels were increased in patients with COVID-19 compared to the healthy controls, and its concentrations were significantly higher in the severe group than in the non-severe group (p < 0.001). BECN1 levels showed a significantly positive correlation with coagulation markers such as D-dimer and Fibrinogen (FIB) and inflammation markers such as C-reactive protein (CRP), Procalcitonin (PCT), Ferritin and biochemical markers such as Blood urea nitrogen and Lactate dehydrogenase (p < 0.001). We detected that areas under the ROC curve for BECN1, D-dimer, FIB, PCT, CRP and Ferritin were 0.8662, 0.9110, 0.8278, 0.9996 and 0.9284, respectively (p < 0.0001). Significance: BECN1 may serve as a predictive biomarker in evaluating the disease severity of COVID-19. Our data suggest that BECN1 mediated-autophagy modulation might have a promising value in improving the clinical outcomes of COVID-19.Öğe Comparison of serum levels of cell adhesion molecules (E-selectin, P-selectin, ICAM-1, VCAM-1, LRG-1) in placental invasion and adhesion anomalies with patients with vaginal delivery and former cesarean(Springer Heidelberg, 2023) Ersuz, Rutkay; Karapinar, Oya Soylu; Dogan, SerdarObjectiveIt is aimed to be a technique that can be used for diagnosis and to prevent maternal deaths in cases where the serum levels of cell adhesion molecules are different in patients with abnormal placentation compared to healthy pregnant women.Materials and methodsPatients between March 2020 and September 2021 were included in the study. While 56 patients, out of 153 cases formed the placental adhesion and/or localization anomaly group, 55 cases without placental adhesion anomaly (placental invasion anomaly and/or previa pathology) constituted the cesarean section group and 42 cases constituted the vaginal birth control group. Demographic characteristics and histories of 153 patients were questioned. I-CAM-1, V-CAM-1, E-Selectin, P-Selectin, LRG-1 levels were studied. The parameters measured by the ELISA method were studied in the Thermo Fisher Scientific Multiscan Go (Finland) device at the Hatay Mustafa Kemal University Medical Faculty Medical Biochemistry USA ELISA Laboratory. Wholehouse and One Way Anova analysis methods were used to compare the results.ResultsThere were significant differences in E-Selectin, P-Selectin, ICAM-1 and LRG-1 values between the groups (p < 0.05). There was a significant difference between the vaginal birth (VB) and previa/percreata (PP) groups in terms of E-Selectin (p = 0.038). In terms of P-Selectin, there was a significant difference between the C/S and previa/percreata (PP) groups (p < 001). P-Selectin was higher in the previa/percreata (PP) group. There was a significant difference between the Vaginally birth (VB), C/S group (p = 0.041) and the vaginal birth (VB), previa/percreata (PP) group (p = 0.013) in terms of ICAM-1, but there was no significant difference between the C/S and previa/percreata (PP) groups. In terms of LRG-1, there was a significant difference between all 3 groups (p < 0.05).DiscussionA recent study investigated the potential modulatory effects of trans-resveratrol (RSV), arginase and endothelial dysfunction biomarkers in patients with PE. Another reflection of endothelial dysfunction in PE is increased endothelial activation biomarkers such as intercellular adhesion molecule-1 (ICAM-1), von Willebrand factor (vWF), and Caspase-3 (CASP-3). The study, regarding vWF expression, the preeclampsia (PE) group showed higher levels compared to endothelial cells incubated with healty pregnant (HP) plasma [Bueno-Pereira et al 2022 Antioxidants 2111]. From this and similar studies, the hypothesis that the role of cell adhesion molecules in endothelial damage may be the underlying cause of invasion and location anomalies emerges. This hypothesis is the starting point of our study.ConclusionsIn our study, all adhesion molecules except V-CAM-1 were found to be significantly higher in the previa/percreata (PP) group. E-Selectin and LRG-1 adhesion molecules were found to be significantly higher even in C/S patients compared to normal delivery. As a result; these adhesion molecules can be studied as a marker in previa/percreata (PP) patients.Öğe Designing and validating an autoverification system of biochemical test results in Hatay Mustafa Kemal University, clinical laboratory(Croatian Soc Medical Biochemistry & Laboratory Medicine, 2022) Gul, Bahar Unlu; Ozcan, Oguzhan; Dogan, Serdar; Arpaci, AbdullahIntroduction: Autoverification (AV) is a postanalytical tool that uses algorithms to validate test results according to specified criteria. The Clinical and Laboratory Standard Institute (CLSI) document for AV of clinical laboratory test result (AUTO-10A) includes recommendations for laboratories needing guidance on implementation of AV algorithms. The aim was to design and validate the AV algorithm for biochemical tests. Materials and methods: Criteria were defined according to AUTO-10A. Three different approaches for algorithm were used as result limit checks, which are reference range, reference range +/- total allowable error, and 2nd and 98th percentile values. To validate the algorithm, 720 cases in middleware were tested. For actual cases, 3,188,095 results and 194,520 reports in laboratory information system (LIS) were evaluated using the AV system. Cohen's kappa (kappa) was calculated to determine the degree of agreement between seven independent reviewers and the AV system. Results: The AV passing rate was found between 77% and 85%. The highest rates of AV were in alanine transaminase (ALT), direct bilirubin (DBIL), and magnesium (Mg), which all had AV rates exceeding 85%. The most common reason for non-validated results was the result limit check (41%). A total of 328 reports evaluated by reviewers were compared to AV system. The statistical analysis resulted in a kappa value between 0.39 and 0.63 (P < 0.001) and an agreement rate between 79% and 88%. Conclusions: Our improved model can help laboratories design, build, and validate AV systems and be used as starting point for different test gro-ups.Öğe Direct-acting antiviral therapy may help restore HCV-induced impaired redox balance and liver fibrosis process(Walter De Gruyter Gmbh, 2023) Bal, Tayibe; Dogan, Serdar; Ozcan, Oguzhan; Cabalak, Mehmet; Cirkin, BerfinObjectives: The aim of this study was to investigate the changes in thiol/disulfide balance, pro-fibrotic mediators (transforming growth factor-beta [TGF-beta] and periostin) and a potential biomarker for the prediction of HCV-induced HCC (3 beta-hydroxysterol Delta 24-reductase [DHCR24]) during direct-acting antiviral (DAA) therapy in chronic hepatitis C (CHC) patients. Methods: This prospective cohort study included 56 non-cirrhotic, treatment-naive CHC patients who were treated with DAAs between January and June 2020. Laboratory tests, including serum total/native thiol, TGF-beta, periostin, DHCR24, total bilirubin and albumin levels were measured and disulfide levels were calculated at baseline, then at 1 month and at the end of therapy (EOT). Results: Of the 56 patients, all achieved a sustained virological response after DAA therapy. There was a significant decrease in serum levels of disulfide and TGF-beta, (p=0.020 and p<0.001, respectively) and a significant increase in serum levels of native thiol compared with baseline levels (p=0.010). There was no significant change in levels of total thiol, DHCR24 and periostin levels. Serum TGF-beta levels were found to be positively correlated with total bilirubin levels (r(s)=0.470, p=0.001) and negatively with albumin levels (r(s)=-0.483, p<0.001). Asignificant moderate positive correlation was determined between baseline serum DHRC24 and disulfide levels (r(s)=0.356, p=0.007). Conclusions: The study results suggest that the DAA therapy may help to restore the impaired thiol/disulfide balance and reduce the pro-fibrotic process in CHC patients by markedly decreasing serum levels of TGF-beta, a key player in HCV-induced liver fibrosis.Öğe The effect of continuous positive airway pressure treatment on inflammatory parameters and periostin levels in patients with obstructive sleep apnea syndrome(Springer Heidelberg, 2023) Tosun, Fatma; Babayigit, Cenk; Dikmen, Nursel; Dogan, Serdar; Dirican, EmreBackground The purpose of the study was to examine the effects of continuous positive airway pressure (CPAP) treatment on inflammation parameters in patients with obstructive sleep apnea syndrome (OSAS). Methods Patients aged 18 to 65 years who underwent polysomnography (PSG) in the sleep clinic between January 1, 2019, and December 31, 2019, were included in the study. Patients with severe OSAS initiated treatment with CPAP. Patients and control subjects were assessed for levels of periostin, TNF-alpha, TGF-beta, and IL-6. Patients were re-evaluated 3 months later. Comparisons for the serum markers were made between controls and patients of different severity of OSAS. Comparisons of serum markers were also made between baseline and 3 month follow-up. Results A total of 92 patients were enrolled in the study, including 25 controls (apnea-hypopnea index or AHI < 5/h), 39 patents with mild to moderate OSAS who did not receive CPAP, and 28 patients with severe OSAS receiving CPAP treatment. When all three groups were compared, levels of periostin, TNF-alpha, TGF-beta, and IL-6, as inflammatory markers, were higher in the OSAS group, though not at a statistically significant level. In patients with severe OSAS, there were statistically significant decreases in the TGF-beta 1, TNF-alpha, and IL-6 values between baseline values and the same measures taken after 3 months of CPAP treatment. Periostin values also decreased after treatment, but this decrease was not at a significant level. Conclusion Inflammatory parameters of patients with OSAS were significantly higher compared with healthy participants. Regression of inflammation was detected after CPAP treatment.Öğe Endometrial Injury Upregulates Expression of Receptivity Genes in Women with Implantation Failure(MDPI, 2023) Celik, Onder; Yurci, Arzu; Ersahin, Aynur; Gungor, Nur D.; Celik, Nilufer; Ozcil, Mustafa D.; Dogan, SerdarBackground: Homeobox genes A10 (HOXA10) and A11 (HOXA11), members of the abdominal B gene family, are responsible for embryonic survival and implantation. This study was planned to investigate whether endometrial injury alters the expression of both transcripts in women with implantation failure. Methods: A total of 54 women with implantation failure were divided into two equal groups as experimental (scratching) and sham (no scratching). Participants in the scratching group were exposed to endometrial injury in the mid-luteal phase, and those in the sham group were exposed to endometrial flushing. The scratching group, but not the sham group, underwent prior endometrial sampling. A second endometrial sampling was performed on the scratching group in the mid-luteal phase of the following cycle. The mRNA and protein levels of the HOXA10 and 11 transcripts were determined in endometrial samples collected before and after injury/flushing. Participants in each group underwent IVF/ET in the cycle after the second endometrial sampling. Results: Endometrial injury caused a 60.1-fold (p < 0.01) increase in HOXA10 mRNA and a 9.0-fold increase in HOXA11 mRNA (p < 0.02). Injury resulted in a significant increase in both HOXA10 (p < 0.001) and HOXA11 protein expression (p < 0.003). There was no significant change in HOXA10 and 11 mRNA expressions after flushing. Clinical pregnancy, live birth, and miscarriage rates of the both groups were similar. Conclusions: Endometrial injury increases homeobox transcript expression at both mRNA and protein levels. © 2023 by the authors.Öğe Evaluation of IL-23p19/Ebi3 (IL-39) gingival crevicular fluid levels in periodontal health, gingivitis, and periodontitis(Springer Heidelberg, 2022) Sari, Aysegul; Dogan, Serdar; Nibali, Luigi; Koseoglu, SerhatObjectives IL-23p19/Ebi3 (IL-39) was described as a new IL-12 family member. The aim of this study is to evaluate the gingival crevicular fluid (GCF) IL-39 levels in periodontal diseases and health and to correlate them to GCF levels of IL-1 beta and periostin. Materials and methods Sixty-six adult patients were included in the study. The study design was comprised of three groups, each containing 22 individuals: the periodontally healthy (PH), gingivitis (G), and periodontitis (P) groups. The clinical periodontal parameters were recorded and GCF samples were collected from the participants. GCF interleukin (IL)-39, IL-1 beta, and periostin levels were examined using the enzyme-linked immunosorbent assay. Results GCF IL-1 beta, periostin, and IL-39 levels were higher in the P and G groups than in the PH group (p < 0.001). Positive correlations were detected between all GCF biochemical parameters and clinical periodontal parameters (p < 0.05). In the multivariate generalized linear regression analysis, the P (beta = 37.6, 95% CI = 22.9-52.4) and G (beta = 28.4, 95% CI = 15.8-41) groups were associated with GCF IL-39 levels (p < 0.001). Conclusion IL-39 levels were elevated in the presence of periodontal disease paralleling the increase in IL-1 beta and periostin levels. IL-39 may have a role in the periodontal inflammation process. Statement of clinical relevance IL-39, a new cytokine from the IL-12 family, can be a possible predictor marker of periodontal diseases.Öğe Evaluation of the possible effect of inspiratory muscle training on inflammation markers and oxidative stress in childhood asthma(Springer, 2023) Gokcek, Ozden; Yurdalan, Ufuk; Tugay, Baki Umut; El, Cigdem; Dogan, SerdarAirway inflammation characterized as asthma is one of the most common chronic diseases in the world. The aim of this study was to evaluate the possible effect of inspiratory muscle training on inflammation markers and oxidative stress levels in childhood asthma. A total of 105 children (age range 8-17 years), including 70 asthmatics and 35 healthy children, participated in the study. The 70 asthma patients were randomly assigned to the inspiratory muscle training (IMT) group (n = 35) and control group (n = 35), and healthy children were assigned to the healthy group (n = 35). The IMT group was treated with the threshold IMT device for 7 days/6 weeks at 30% of maximum inspiratory pressure. Respiratory muscle strength was evaluated with a mouth pressure measuring device, and respiratory function was evaluated with a spirometer. In addition, CRP, periostin, TGF-beta, and oxidative stress levels were analyzed. The evaluation was performed only once in the healthy group and twice (at the beginning and end of 6 weeks) in asthma patients. In the study, there were significant differences between asthma patients and the healthy group in terms of MIP and MEP values, respiratory function, oxidative stress level, periostin, and TGF-beta. Post-treatment, differences were observed in the oxidative stress level, periostin, and TGF-beta of the IMT group (p <.05). Conclusion: After 6 weeks of training, IMT positively contributed to reducing the inflammation level and oxidative stress. This suggests that IMT should be used as an alternative therapy to reduce inflammation and oxidative stress.Öğe Hemostatic effects of traditional Inula viscosa and Capsella bursa-pastoris plant mixture extract on rat liver parenchymal bleeding model(Turkish Assoc Trauma Emergency Surgery, 2022) Ozturk, Ozan Utku; Ugur, Mustafa; Guzel, Yelda; Ozturk, Mehmet Ali; Gursoy, Didar; Dogan, Serdar; Temiz, MuhyittinBACKGROUND: Failure to achieve effective bleeding control and problems related to transfusion in liver surgery are the most common causes of post-operative mortality and morbidity. Various methods/drugs including topical hemostatic agents have been employed for bleeding control in liver surgery. This study was aimed to investigate the hemostatic properties of the herb mixture extract of Inula viscosa and Capsella bursa-pastoris (IvCbp) in rat liver laceration model, which have been traditionally used as antiseptic and hemostatic agents public in Hatay/Tukey. METHODS: Thirty rats were divided into three groups equally and blood samples were taken from all rats for preoperative hemoglobin (Hb) measurements. Then, the standard liver resection model was applied to all rats. Sponge for the first rat group, Ankaferd Blood Stopper (R) Trend-Tech for the second rat group and IvCbp plant extract mixture for the third group were applied to resection areas for 3 minutes. Liver samples of all rats were evaluated in terms of inflammation and necrosis intensity on the 5th post-operative day. RESULTS: operative Hb values were found as 11.0 +/- 1.1 g/dL in the sponge group, 11.9 +/- 2.0 g/dL in the Ankaferd group, and 14.I +/- 1.2 g/dL in the IvCbp herb mixture group (p<0.001). In the histopathological examination, less necrosis was observed in the herb mixture group compared to the sponge and Ankaferd groups (p=0.001). In addition, no statistically significant necrosis difference was observed between sponge and Ankaferd groups. While less inflammation was observed in the herb mixture group compared to the other groups, Ankaferd group had the highest inflammation score (p<0.001). CONCLUSION: IvCbp herb mixture extract group provide effective hemostatic control, caused less Hb decrease and resulted in less inflammation and necrosis compared to Ankaferd and sponge groups in a rat liver resection model.Öğe In vivo protective effects of upper zone of growth plate and cartilage matrix associated protein against cartilage degeneration in a monosodium iodoacetate induced osteoarthritis model(Canadian Science Publishing, 2020) Okuyan, Hamza Malik; Terzi, Menderes Yusuf; Karaboga, Ihsan; Dogan, Serdar; Kalacı, AydınerOsteoarthritis (OA) is a degenerative disease affecting the majority of over 65 year old people and characterized by cartilage degeneration, subchondral abnormal changes, and inflammation. Despite the enormous socioeconomic burden caused by OA, currently, there is no effective therapy against it. Upper zone of growth plate and cartilage matrix associated protein (UCMA) is a vitamin K dependent protein and has a critical role in pathophysiological conditions associated with bone and cartilage. However, there is no research on the protective role of intra-articular UCMA treatment in OA pathogenesis. Therefore, we aimed to investigate the potential therapeutic role of UCMA in an in vivo model of OA. We report for the first time that intra-articular UCMA injection ameliorated cartilage degeneration in a monosodium iodoacetate induced OA rat model. Furthermore, the OA-induced activation of nuclear factor kappa B and bone morphogenetic protein 2 signals was attenuated by UCMA. Our results indicated that UCMA decreased cartilage oligomeric matrix protein levels but did not affect interleukin 6, total antioxidant status, and total oxidant status levels in the serum. In conclusion, UCMA exhibited a therapeutic potential in the treatment of OA. This protective effect of UCMA is possibly achieved by reducing the aggrecanase activity and the production of inflammatory cytokines.Öğe Intra-day changes in the levels of biochemistry parameters(Kare Publishing, 2022) Arpaci, Abdullah; Dogan, Serdar; Gul, Bahar Unlu; Kus, Berna; Dirican, EmreObjectives: People mostly live in the nonfasting state during a normal 24-h cycle. This study aims to compare the levels of 18 biochemical parameters during different hours of the day. Methods: A total of 18 biochemical tests of patients who visited outpatient clinics only once between January 1, 2010, and December 31, 2019, were evaluated at the Hatay Mustafa Kemal University (HMKU) Central Laboratory by using hospital database information. The tests are albumin (Alb), aspartate aminotransaminase (AST), alanine aminotransam-inase (ALT), alkaline phosphatase (ALP), amylase, blood urea nitrogen (BUN), calcium (Ca), total cholesterol (TC), cre-atine kinase (CK), creatinine (Cr), gamma-glutamyltransferase (GGT), glucose, high-density lipoprotein cholesterol (HDL-C), inorganic phosphorus (Pi), iron (Fe), total protein (TP), triglyceride (TG), and lipase. The blood samples of the patient were divided into eight groups according to their collection time as follows: (a) 07:00-07:59, (b) 08:00-08:59, (c) 09:00-09:59, (d) 10:00-10:59, (e) 11:00-11:59, (f) 12:00-13:59, (g) 14:00-14:59, and (h) 15:00-17:00. Results: A statistically significant difference was found between the groups in terms of all parameters except amylase, GGT, and TP (p<0.05). The effect size refers to the minimum amount of difference that is clinically significant. According to the effect size values, there was no significant difference between time groups in the following parameters: Alb, ALT, AST, Pi, Ca, TC, Cr, Fe, glucose, BUN, lipase, TG, ALP, HDL-C, and CK (?<0.30). Conclusion: When considering all of the results, nonfasting screening would not only be acceptable but also make physiologic sense. © 2022, Kare Publishing. All rights reserved.Öğe Lymphocyte-to-C-reactive protein ratio may serve as an effective biomarker to determine COVID-19 disease severity(Walter De Gruyter Gmbh, 2021) Bal, Tayibe; Dogan, Serdar; Cabalak, Mehmet; Dirican, EmreObjectives: We aimed to evaluate the ability of lymphocyte-C-reactive protein ratio (LCR) to discriminate between different levels of severity of COVID-19 disease. Methods: This retrospective observational single-center study was performed on 61 confirmed (PCR positive) COVID-19 patients between March and June 2020. The study population was separated into three groups: mild/moderate (n=24), severe (n=25) and critically ill (n=12). The optimal cutoff values of the LCR and neutrophil-to-lymphocyte ratio (NLR) in discriminating between patients with different severity levels were calculated by applying the receiver operating curve (ROC) analysis. Results: At baseline, the LCR decreased significantly across the three severity groups (mild/moderate > severe > critically ill). ROC analysis showed that a mean LCR of 43.21 was the cut-off value which best discriminated patients with the critically ill disease from severe patients (sensitivity: 84% and specificity: 69%). The discriminative performance of LCR (ROC AUC 0.820) was better than that of NLR (0.751) in this regard. LCR, unlike NLR was able to distinguish severe patients from mild/moderate patients, with a cut off value of 458.19 (sensitivity: 80% and specificity: 45%). Conclusion: LCR was observed to be able to distinguish COVID-19 infected patients of different severity (mild/moderate, severe and critically ill) and was superior to NLR in this regard.Öğe Metal toxicity risk of commercial cephalopod species and public health concerns(Elsevier, 2023) Duysak, Onder; Kilic, Ece; Ugurlu, Erkan; Dogan, SerdarMetals in the marine environment threaten aquatic animals and their upper trophic level predators, as they not only jeopardize their well-being but accumulate in their tissues, posing potential health risks. The present study focused on sampling Eledone moschata, Octopus vulgaris, and Illex coindetii from the Marmara, Aegean, and Mediterranean Seas. The study aimed to assess the accumulation levels of aluminum (Al), chromium (Cr), cobalt (Co), nickel (Ni), cadmium (Cd), lead (Pb), manganese (Mn), iron (Fe), copper (Cu), and zinc (Zn) in the mantle, gill, and hepatopancreas tissues. Significant variations in metal accumulation levels were observed depending on the sampled station and tissues. Iron, copper, and zinc exhibited the highest concentrations in the tissues, whereas nickel and cadmium showed the lowest concentrations. The mantle exhibited the lowest metal concentration, whereas the hepatopancreas showed the highest concentration among the studied tissues. Furthermore, a health risk analysis was conducted using the Target Hazard Quotient (THQ) and lifetime cancer risk (CR) assessments. The analysis results indicated no significant health risk associated with the consumption of the studied species from the Marmara Sea, Aegean Sea, and the Mediterranean Sea.& COPY; 2023 Elsevier B.V. All rights reserved.Öğe Oxidative stress index can be a new marker related to disease severity in COVID-19(Walter De Gruyter Gmbh, 2021) Dogan, Serdar; Bal, Tayibe; Cabalak, Mehmet; Dikmen, Nursel; Yaqoobi, Hasibullah; Ozcan, OguzhanObjectives: The aim of this study was to evaluate the relationship between systemic oxidative balance, and the severity of the disease in patients with COVID 19. Methods: Sixty-four patients were divided into three groups according to the severity of the disease: mild (n=28), moderate (n=11) and severe (n=25). Twenty-four healthy controls included to the study. Proinflammatory cytokines (IL-6 and TNF-alpha), D-dimer, fibrinogen, total oxidative status (TOS), total antioxidant status (TAS) were measured and oxidative stress index (OSI) was calculated. Results: The mean age of severe group was significantly higher than the other groups (p=0.001). TAS levels were significantly decreased in all patient groups compared to controls, while serum TOS and OSI levels were significantly different in all three stages of the disease. Serum IL-6 and TNF-alpha levels were significantly elevated in severe group compared to other groups. TOS and OSI levels were also significantly correlated with IL-6, CRP, ferritin, fibrinogen, LDH and D-dimer. Conclusions: TOS and OSI levels are an indicator of systemic oxidative balance in COVID-19 and related to the disease severity. They can be an important marker for evaluating the disease severity and used in the management of patients with COVID-19.Öğe Plasma Apelin Levels and Thiol/Disulfide Balance in Patients with Type 2 Diabetes Mellitus(Aves, 2023) Gunes, Umran Gezici; Turgut, Faruk; Erdal, Huseyin; Dogan, SerdarObjective: The main objective of this research is to investigate the relationship between the plasma apelin concentrations, oxidative stress biomarkers (dynamic thiol/disulfide balance), and albuminuria in patients with type 2 diabetes mellitus. Methods: The study was carried out with 87 patients with type 2 diabetes mellitus and 24 age- and sex-matched healthy control group. Serum apelin concentrations were studied using the enzyme-linked immunosorbent assay method. Colorimetric method was used to determine native and total thiol levels. Concentrations of spot urine albumin and creatinine were measured to calculate the albumin creatinine ratio (mg/g). Results: Serum apelin concentrations were significantly lower in patients with type 2 diabetes mellitus compared to the control group (P <.001). Native and total thiol ratios were also significantly lower in diabetic patients compared to healthy patients (P <.001). The calculated disulfide levels of the patients and control groups were similar (P =.182). A negative and osignificant correlation was detected between serum apelin concentrations, and glucose and hemoglobin A1c levels in diabetic patients (r = -0.272, P =.004, r = -0.280, P =.003, respectively). A negative and significant correlation was also observed between native and total thiol levels and albumin (r = -0.338, P =.001, r = -0.328, P =.001, respectively). Conclusion: We found significantly lowered serum apelin concentrations and native and total thiol levels in patients with type 2 diabetes mellitus. An association was also observed between serum apelin concentrations and glycemic control. The role of apelin and thiol/disulfide balance in diabetic kidney disease requires more detailed studies.Öğe Possible role of endocannabinoids in olfactory and taste dysfunctions in Alzheimer's and Parkinson's patients and volumetric changes in the brain(Elsevier Sci Ltd, 2022) Petekkaya, Emine; Kus, Berna; Dogan, Serdar; Bayarogullari, Hanifi; Mutlu, Turay; Melek, Ismet Murat; Arpaci, AbdullahThe purpose of this study is to determine the volumes of primary brain regions associated with smell and taste in Alzheimer's and Parkinson's patients and healthy controls using MR imaging and examine volumetric changes in comparison to smell/taste questionnaire and test results and endocannabinoid (EC) levels. The study included 15 AD patients with mild cognitive dysfunction scored as 18 <= MMSE <= 23, 15 PD patients with scores of 18 < MoCA < 26 and 18 <= MMSE <= 23, and 15 healthy controls. A taste and smell questionnaire was given to the participants, and their taste and smell statuses were examined using the Sniffin' Sticks smell identification test and Burghart Taste Strips. EC levels were analyzed in the blood serum samples of the participants using the ELISA method. The volumes of the left olfactory bulb (p = 0.001), left amygdala (p = 0.004), left hippocampus (p = 0.008), and bilateral insula (left p = 0.000, right p = 0.000) were significantly smaller in the Alzheimer's patients than the healthy controls. The volumes of the left olfactory bulb (p = 0.001) and left hippocampus (p = 0.009) were significantly smaller in the Parkinson's patients than the healthy controls. A significant correlation was determined between volume reduction in the left Rolandic operculum cortical region and taste dysfunction. EC levels were significantly higher in both AD (p = 0.000) and PD (p = 0.006) in comparison to the controls. Our results showed that volumetric changes occur in the brain regions associated with smell and taste in Alzheimer's and Parkinson's patients. It was observed that ECs played a role in these volumetric changes and the olfactory and taste dysfunctions of the patients.
