34 results on '"Yazıcı, Cevat"'
Search Results
2. Preparation of nature inspired indicator based agar for detection and identification of MRSA and MRSE
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Celik, Cagla, Ildiz, Nilay, Sagiroglu, Pinar, Atalay, M. Altay, Yazici, Cevat, and Ocsoy, Ismail
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- 2020
- Full Text
- View/download PDF
3. Protective effect of N-acetylcysteine against cisplatin ototoxicity in rats: a study with hearing tests and scanning electron microscopy
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Somdaş, Mehmet Akif, Güntürk, İnayet, Balcıoğlu, Esra, Avcı, Deniz, Yazıcı, Cevat, and Özdamar, Saim
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- 2020
- Full Text
- View/download PDF
4. Does dexmedetomidine prevent colistin nephrotoxicity?
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Talih, Gamze, Esmaoğlu, Aliye, Bayram, Adnan, Yazici, Cevat, Deniz, Kemal, and Talih, Tutkun
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- 2018
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5. Dexmedetomidina impede a nefrotoxicidade da colistina?
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Talih, Gamze, Esmaoğlu, Aliye, Bayram, Adnan, Yazici, Cevat, Deniz, Kemal, and Talih, Tutkun
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- 2018
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6. The Relationship Between Plasma Gelsolin Levels and Myeloperoxidase in Patients Undergoing Hemodialysis: A Prospective, Observational, Controlled Study.
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Tural, Hacı Huseyin, Kose, Kader, Gunturk, Inayet, Kocyigit, Ismail, and Yazıcı, Cevat
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MYELOPEROXIDASE ,HEMODIALYSIS ,GELSOLIN ,CARDIOVASCULAR diseases ,COMORBIDITY ,KIDNEY failure - Abstract
Objective: Given the association of inflammatory conditions with the development of comorbidities, particularly cardiovascular diseases, it is crucial to monitor inflammation in hemodialysis patients. This study aimed to evaluate plasma gelsolin and myeloperoxidase (MPO) levels before and after dialysis sessions and to assess their relationship with inflammation. Materials and Methods: The study included 16 healthy volunteers and 30 patients receiving regular hemodialysis treatment. Along with routine biochemical analyses, plasma gelsolin and MPO levels were measured in blood samples taken from the study group before and after the sessions. Results: Plasma gelsolin levels were found to be statistically higher both before and after dialysis compared to the control group (p=0.000); however, there was no significant change during the session (p=0.094). Conversely, plasma MPO activity, which was significantly higher before dialysis, increased at the end of the session (p=0.000). Conclusion: It can be concluded that elevated levels of gelsolin are associated with a chronic inflammatory response, as indicated by high-sensitivity C-reactive protein (hs- CRP) and MPO levels. Consequently, gelsolin could be considered a supportive treatment strategy for these patients. [ABSTRACT FROM AUTHOR]
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- 2024
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7. Heart-type fatty acid binding protein and cardiac troponin I may have a diagnostic value in electrocution: A rat model
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Özdemir, Çağlar, Asil, Haşim, Yazıcı, Cevat, Akgün, Hülya, Akçay, Arzu, and İkizceli, İbrahim
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- 2016
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8. Investigation on Malondialdehyde, S100B, and Advanced Oxidation Protein Product Levels in Significant Hyperbilirubinemia and the Effect of Intensive Phototherapy on these Parameters
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Sarici, Dilek, Gunes, Tamer, Yazici, Cevat, Akin, Mustafa Ali, Korkmaz, Levent, Memur, Seyma, Kurtoglu, Selim, Ozturk, Mehmet Adnan, and Sarici, Serdar Umit
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- 2015
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9. POSTOPERATİF ATRİYAL FİBRİLASYON GELİŞİMİNİ ÖNGÖRMEDEALBUMİN / GLOBULİN ORANI ERKEN PREDİKTİF BİR BELİRTEÇ OLABİLİR Mİ ?
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Taşdemir, Haluk Kutay, Özocak, Osman Okan, Yazıcı, Cevat, Keleşoğlu, Şaban, Tunçay, Aydın, Güntürk, İnayet, and Özmen, Rifat
- Published
- 2022
10. The Effects of Genistein as Supplement to Oral/Enteral Nutrition on Inflammatory Cytokines in Septic ICU patients: A Prospective, Single-center, Randomized Controlled Pilot Study.
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Elay, Gülseren, Gündoğan, Kürşat, Güntürk, İnayet, Temel, Şahin, Özer, Nurhayat Tuğra, Sipahioğlu, Hilal, Küçük, Ömer, Yazıcı, Cevat, Güven, Muhammet, and Sungur, Murat
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HIGH mobility group proteins ,GENISTEIN ,ENTERAL feeding ,TUMOR necrosis factors - Abstract
Objective: Genistein has an anti-inflammatory effect that may be beneficial in many inflammatory diseases. The aim of this study was to determine the effects of supplementation of oral/enteral nutrition (EN) with genistein on the level of inflammatory cytokines in septic patients. Materials and Methods: This prospective, randomized controlled study included critically ill adult patients with sepsis receiving EN or oral/EN. The patients were randomly divided into a genistein or a control group. Genistein (60 mg/day) was administered as a supplement to EN in the genistein group and the control group received only EN or oral/EN. Serum interleukin 1 beta (IL-1β), interleukin 6 (IL-6), high mobility group box 1 protein (HMGB-1), tumor necrosis factor alfa (TNF-α), procalcitonin (PCT), and C-reactive protein (CRP) concentrations were serially measured at the baseline, 24th hour, and 72
nd hour after admission. Results: Thirty-two participants (genistein group: 16 patients, control group: 16 patients) were included. The mean age was 56±17 years. The serum IL-1β concentration in the genistein group was significantly higher than that of the control group in follow-up (p=0.001). The control group had a significantly lower serum IL-6 value at the 72nd hour compared with the baseline and 24th -hour values (p=0.001). The TNF-α concentration was significantly greater (p<0.001, both groups), while the PCT values were lower in follow-up measurements (genistein group: p=0.031; control group: p=0.004). The CRP level was higher in the genistein group than in the control group at the baseline (p=0.019) and significantly lower in follow-up measurements (p=0.028). At all of the study time points, the serum IL-6, TNF-α, HMGB-1, and PCT level of the genistein group was similar to that of the control group. Conclusion: Genistein supplementation may add to the inflammation process and worsen the prognosis of sepsis patients in the acute period. [ABSTRACT FROM AUTHOR]- Published
- 2023
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11. Evaluation of physical and vital signs and the effect of carnosine in experimental hyperthyroidism.
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Dağlı, Fatma, Güntürk, İnayet, Seydel, G. Şeyda, and Yazıcı, Cevat
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CARNOSINE ,VITAL signs ,HYPERTHYROIDISM ,BODY temperature ,BODY weight - Abstract
Copyright of Cukurova Medical Journal / Çukurova Üniversitesi Tip Fakültesi Dergisi is the property of Cukurova University, Faculty of Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
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- View/download PDF
12. ß-glukan, sıçanlarda deneysel sepsis modelinde oksidatif strese karşı koruyucu rol oynayabilir mi?
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Demir, Meltem, Köse, Kader, Yazıcı, Cevat, Sözüer, Erdoğan Mütevelli, İstinye Üniversitesi, Tıp Fakültesi, Temel Tıp Bilimleri Bölümü, Meltem Demir / 0000-0002-0836-8585, Demir, Meltem, Hakan Ongun / AAP-8851-2021, and Meltem Demir / 56689396100
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stomatognathic diseases ,Myeloperoxidase ,Advanced Oxidation Protein Products ,B-Glucan ,Sepsis ,Reactive Oxygen Species - Abstract
BACKGROUND: Very high mortality rate in sepsis may be related to oxidative stress. This study was conducted on the rats to investigate the presence of oxidative stress and also the potential protective effects of the ß-glucan in the intra-abdominal sepsis model formed by cecal ligation-perforation (CLP). METHODS: In this study, 30 Male rats were equally divided into three groups as “Sham”, “Sepsis” and “ß-Glucan”. Only laparotomy was performed in the Sham group, and sepsis was induced by CLP in Sepsis and ß-Glucan groups. Following CLP, a single dose of 4 mg ß-glucan/kg was also intraperitoneally administered to the β-Glucan group. Blood and tissue (liver, lung and kidney) samples were taken from Sepsis and ß-Glucan groups after sepsis development determined at the end of the 48th hour, also from the Sham group. The levels of myeloperoxidase (MPO) and advanced oxidation protein products (AOPP) were determined in plasma samples, and the malondialdehyde (MDA) was measured in plasma and tissues. RESULTS: MPO and AOPP were higher in both the Sepsis and ß-Glucan groups; however, plasma and tissue MDA levels were higher only in the Sepsis group than the Sham group (p
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- 2020
13. Effect of N-acetylcysteine on cisplatin induced apoptosis in rat kidney.
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Güntürk, Inayet, Seydel, G. Şeyda, Dağlı, Fatma, Yay, Arzu, Yazıcı, Cevat, and Köse, Kader
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CISPLATIN ,ACETYLCYSTEINE ,APOPTOSIS inhibition ,BLOOD urea nitrogen ,LABORATORY rats - Abstract
Copyright of Cukurova Medical Journal / Çukurova Üniversitesi Tip Fakültesi Dergisi is the property of Cukurova University, Faculty of Medicine and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2022
- Full Text
- View/download PDF
14. Pnömotik Tüp Sistem Kapsülleri Dezenfekte Edilmeli Mi?
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Atalay, Mustafa Altay, Sağıroğlu, Pınar, and Yazıcı, Cevat
- Published
- 2019
15. Sisplatin ile Oluşturulan Testis Hasarına Karşı N-Asetilsistein’in Etkisi
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Yazıcı, Cevat, Güntürk, İnayet, Göç, Rümeysa, Özyazgan, Tuğçe Merve, Balcıoğlu, Esra, Yay, Arzu Hanım, and Ceyhan, Ayşe
- Published
- 2018
16. İdrar Numunelerinde Preanalitik Hata Kaynaklarının Azaltılması
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Yazıcı, Cevat
- Abstract
Urine may be a waste product, but it contains an enormous amount ofinformation. Well-standardized procedures for collection, transport,sample preparation and analysis should become the basis of an effective diagnostic strategy for urinalysis. As reproducibility of urinalysis hasbeen greatly improved due to recent technological progress, preanalytical requirements of urinalysis have gained importance and have becomestricter. Since the patients themselves often sample urine specimens,urinalysis is very susceptible to preanalytical issues. In order to increasethe reliability of the test results and to reduce the cost, the precautionarymeasure and prevention is very important in the preanalytical phase. Thelaboratory must monitor and evaluate the overall quality of the preanalytic systems and correct identified problems for each specialty and subspecialty of testing performed. The laboratory must establish and followwritten policies and procedures for an ongoing mechanism to monitorassess, and when indicated, correct problems identified in the preanalytic systems. The preanalytic systems assessment must include a review ofthe effectiveness of corrective actions taken to resolve problems, revisionof policies and procedures necessary to prevent recurrence of problems,and discussion of preanalytic systems assessment reviews with appropriate staff. The laboratory must document all preanalytic systems assessment activities. An effective diagnostic strategy from urine should bebased on standard procedures for collection, transport and analysis. Thetime of specimen collection must be recorded both on the examinationrequest and on the subsequent report to aid in the correct interpretationof findings.
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- 2018
17. Increased hip circumference in individuals with metabolic syndrome affects serum nesfatin-1 levels
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Tekin, Tuba, primary, Çiçek, Betül, additional, Konyalıgil, Nurefşan, additional, Güntürk, İnayet, additional, Yazıcı, Cevat, additional, Karaca, Züleyha, additional, and Ünlüsavuran, Meltem, additional
- Published
- 2019
- Full Text
- View/download PDF
18. Proteomic Analysis of Liver Preservation Solutions Prior to Liver Transplantation
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Coskun, Abdurrahman, primary, Baykal, Ahmet Tarik, additional, Oztug, Merve, additional, Kazan, Dilek, additional, Kaya, Ekrem, additional, Emiroglu, Remzi, additional, Yılmaz, Sezai, additional, Dundar, Halit Ziya, additional, Akgoz, Muslum, additional, Berber, Ibrahim, additional, Aktas, Hikmet, additional, Bilsel, Gokhan, additional, Karaosmanoglu, Kubra, additional, Çetiner, Banu, additional, Arslan, Cansu, additional, Yurtsever, Ilknur, additional, and Yazıcı, Cevat, additional
- Published
- 2019
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- View/download PDF
19. Increased hip circumference in individuals with metabolic syndrome affects serum nesfatin-1 levels.
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Tekin, Tuba, Çiçek, Betül, Konyalıgil, Nurefşan, Güntürk, İnayet, Yazıcı, Cevat, Karaca, Züleyha, and Ünlüsavuran, Meltem
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METABOLIC syndrome ,DIABETES in women ,SERUM ,WAIST-hip ratio - Abstract
Background: This case-control study was conducted to investigate the relationship between serum nesfatin-1 levels and nutritional status and blood parameters in patients diagnosed with metabolic syndrome.Methods: Thirty patients (case) diagnosed with metabolic syndrome according to National Cholesterol Education Program-Adult Treatment Panel III criteria were included. Thirty healthy subjects (control) matched with patients with metabolic syndrome in terms of age, gender and body mass index were included. Three-day food consumption records were obtained. Anthropometric indices were measured and body composition was determined by bioelectrical impedance method. Biochemical parameters and serum nesfatin-1 levels were measured after 8 hours of fasting.Results: Serum nesfatin-1 levels were 0.245±0.272 ng/mL in the case group and 0.528±0.987 ng/mL in the control group (p>0.05). There was a positive significant correlation between serum nesfatin-1 levels and body weight, waist and hip circumferences in the case group (p<0.05). Each unit increase in hip circumference measurement affects the levels of nesfatin by 0.014 times. In the control group, there was a positive significant correlation between body weight and serum nesfatin-1 levels (p<0.05). A significant correlation was detected between HbA1c and serum nesfatin-1 levels in the case group (p<0.05). A significant relationship was detected between dietary fibre intake and the serum nesfatin-1 levels in the case group (p<0.05).Conclusions: Anthropometric indices and blood parameters were correlated with serum nesfatin-1 levels in patients with metabolic syndrome. More clinical trials may be performed to establish the relationship between serum nesfatin-1 levels and nutritional status. [ABSTRACT FROM AUTHOR]- Published
- 2020
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- View/download PDF
20. Does ß-glucan can have a protective role against oxidative stress in the experimental sepsis model in rats?
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Demir, Meltem, Köse, Kader, Yazıcı, Cevat, and Sözüer, Erdoğan Mütevelli
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REACTIVE oxygen species ,ANIMAL experimentation ,INTRAPERITONEAL injections ,PEROXIDASE ,PROTEINS ,RATS ,SEPSIS ,MALONDIALDEHYDE ,OXIDATIVE stress ,BETA-glucans - Abstract
Copyright of Turkish Journal of Trauma & Emergency Surgery / Ulusal Travma ve Acil Cerrahi Dergisi is the property of KARE Publishing and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2020
- Full Text
- View/download PDF
21. Obestatin Reduces Intestinal Damage in Experimental Necrotizing Enterocolitis in Newborn Rats
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Korkut, Sabriye, additional, Özdemir, Ahmet, additional, Yay, Arzu Hanım, additional, Yalçın, Betül, additional, Ceylan, Mahir, additional, Korkmaz, Levent, additional, Yazıcı, Cevat, additional, Güntürk, İnayet, additional, and Kurtoğlu, Selim, additional
- Published
- 2018
- Full Text
- View/download PDF
22. Comparison of Different Dialysis Modalities in End-Stage Renal Disease Patients with Acute Dialysis Requirement
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Koçyiğit, İsmail, primary, Doğan, İmran, additional, Yazıcı, Cevat, additional, Eroğlu, Eray, additional, Ünal, Aydın, additional, Doğan, Muhammed, additional, Sipahioğlu, Murat Hayri, additional, Oymak, Oktay, additional, and Tokgöz, Bülent, additional
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- 2017
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23. Effects of thymoquinone in prevention of experimental contrast-induced nephropathy in rats.
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Topaloğlu, Ulaş Serkan, Sipahioğlu, Murat Hayri, Güntürk, İnayet, Akgün, Hülya, Doğan, Muhammet Ensar, Sönmez, Gökhan, Elmalı, Ferhan, and Yazıcı, Cevat
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RATS ,KIDNEY diseases ,OXIDATIVE stress ,MICROSCOPY ,BLACK cumin ,CONTRAST induced nephropathy - Abstract
Objective(s): This study aimed to show the effects of thymoquinone, which is known for its antioxidant, anti-inflammatory, and renal protective effects in contrast-induced nephropathy. Materials and Methods: This is an experimental study in rats. 7 groups were included within the scope of our study: sham-vehicle (n=3), premedication-control (n=6), model (n=6), isolated thymoquinone (n=3+3), low-dose thymoquinone (n=6), and high-dose thymoquinone (n=7). In addition to 48 hr of water deprivation, we pre-medicated the rats with intra-peritoneal indomethacin and L-NAME administration. After premedication, 12.5 ml/kg dose of a high osmolar contrast agent-diatrizoat (Urografin %76) was administrated. Thymoquinone was administrated in two different doses of 1 mg/kg and 1.75 mg/kg for four days intraperitoneally. Renal functions, histopathological differences, oxidative stress parameters, and inflammatory indicators of rats were evaluated at the end of the study. Results: Significant decreases were observed in levels of serum creatinine and serum BUN with low-dose thymoquinone (1 mg/kg) administration. In light microscopy, significantly less histopathological damage was observed in the low-dose thymoquinone group compared to the contrast agent group. While high-dose thymoquinone is accepted as ineffective biochemically, toxic evidence was identified histopathologically. There were no significant differences between M and TA groups for serum MDA and SOD levels, which were compared to evaluate oxidative stress (P:0.99, P:0.98; respectively). TNF-α, iNOS, and NF-кB gene expressions were not significantly different between all groups (P:0.748, P:0.531, P:0.910; respectively). Conclusion: This experimental study has demonstrated for the first time the protective effect of the TQ substance for CIN in 1 mg/kg dose, in the accompaniment of biochemical and histopathological data in rats. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
24. Obestatin Reduces Intestinal Damage in Experimental Necrotizing Enterocolitis in Newborn Rats.
- Author
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Korkut, Sabriye, Özdemir, Ahmet, Yay, Arzu Hanım, Yalçın, Betül, Ceylan, Mahir, Korkmaz, Levent, Yazıcı, Cevat, Güntürk, İnayet, and Kurtoğlu, Selim
- Subjects
ANIMAL experimentation ,ASPHYXIA ,BIOCHEMISTRY ,NEONATAL necrotizing enterocolitis ,HUMANITY ,HYPOTHERMIA ,INTERLEUKINS ,INTESTINES ,NECROSIS ,RATS ,MICROTECHNIQUE ,MALONDIALDEHYDE ,DESCRIPTIVE statistics ,GHRELIN ,THERAPEUTICS - Abstract
Objective To investigate the effect of pretreatment with obestatin (OB), an endogenous hormone also found in mother's milk, in experimental necrotizing enterocolitis (NEC). Study Design Pups were randomized into four groups: control, OB-control, NEC, and OB-NEC. NEC was induced by asphyxia and hypothermia in the NEC and OB-NEC groups. OB was administered to the OB-control and OB-NEC groups. Macroscopic scoring of the intestinal tract was evaluated and tissue samples were obtained for histopathological and biochemical examination on the fourth day. Results OB improved the macroscopic appearance of the gut and the clinical score during the experiment (p < 0.05). The rate of occurrence of NEC in the OB-NEC group was lower than the NEC group (p = 0.001). OB prevented necrosis and reduced the number of apoptotic cells in the OB-NEC group compared with the NEC group (p = 0.006). Furthermore, interleukin-6 and malondialdehyde levels in the OB-NEC group were lower than the NEC group (p < 0.05). Conclusion OB reduced intestinal damage and prevented necrosis through anti-inflammatory and antiapoptotic effects in experimental NEC. This effect of OB should be confirmed in clinical studies. Furthermore, future research should investigate whether OB plays a role in NEC pathogenesis or NEC is associated with OB levels in the serum and in breast milk. [ABSTRACT FROM AUTHOR]
- Published
- 2019
- Full Text
- View/download PDF
25. Proteomic Analysis of Kidney Preservation Solutions Prior to Renal Transplantation
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Coskun, Abdurrahman, primary, Baykal, Ahmet Tarik, additional, Kazan, Dilek, additional, Akgoz, Muslum, additional, Senal, Merve Oztug, additional, Berber, Ibrahim, additional, Titiz, Izzet, additional, Bilsel, Gokhan, additional, Kilercik, Hakan, additional, Karaosmanoglu, Kubra, additional, Cicek, Muslum, additional, Yurtsever, Ilknur, additional, and Yazıcı, Cevat, additional
- Published
- 2016
- Full Text
- View/download PDF
26. The clinical and systemic effects of periodontal treatment in diabetic and non-diabetic obese patients
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Taşdemir, Zekeriya, primary, Özsarı Taşdemir, Funda, additional, Koçyiğit, İsmail, additional, Yazıcı, Cevat, additional, and Gürgan, Cem A., additional
- Published
- 2016
- Full Text
- View/download PDF
27. N-Acetyl Cysteine Reduces Cisplatin Ototoxicity.
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Somdaş, Mehmet Akif, Güntürk, İnayet, Avcı, Deniz, Yazıcı, Cevat, Balcıoğlu, Esra, Ünsal, Selim, and Gündüz, Mehmet
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OTOTOXICITY ,OTOACOUSTIC emissions ,CYSTEINE ,CISPLATIN ,LABORATORY mice - Abstract
Objective: To investigate the changes in otoacoustic emissions (OAEs) for detecting the ototoxicity of cisplatin and to study the possible preventive effect of N-acetylcysteine (NAC) in cisplatin ototoxicity. Materials and Methods: This study was conducted on 21 Wistar albino rats in four groups. Cisplatin, cisplatin plus NAC, NAC alone, and saline were intraperitoneally administered. The rats were anesthetized to study the otoacoustic emissions before and after the experiment. Results: The OAEs were attenuated in the cisplatin group: (-1.31/-4.90), (6.28/4.58), (4.00/0.93), (2.73/-3.74), (2.66/-4.53). The group that received NAC in addition to cisplatin had better OAEs. Conclusion: Cisplatin ototoxicity can be detected by OAE testing in rats, and NAC may reduce the ototoxic effect. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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- View/download PDF
28. Skleroderma hastalarının nutrisyonel durumunun değerlendirilmesi.
- Author
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Şenel, Soner, Yılmaz, Emre, Yıldırım, Alper, Ertaş, Şule Ketenci, Erol, Kemal, and Yazıcı, Cevat
- Abstract
Copyright of Journal of Turkish Society for Rheumatology is the property of Galenos Yayinevi Tic. LTD. STI and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
- Published
- 2018
29. Deneysel sisplatin nefrotoksisitesine karşı n-asetilsisteinin etkisi
- Author
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Güntürk, İnayet, Yazıcı, Cevat, and Biyokimya Anabilim Dalı
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Inflammation ,Toxicity ,Oxidative stress ,Biyokimya ,Animal experimentation ,Toxicity tests ,Cisplatin ,Nephrotoxicity ,Biochemistry ,N-acetylcysteine ,Acetylcysteine ,Rats - Abstract
DENEYSEL SİSPLATİN NEFROTOKSİSİTESİNE KARŞI N-ASETİLSİSTEİNİN ETKİSİ İnayet GÜNTÜRKErciyes Üniversitesi, Sağlık Bilimleri EnstitüsüBiyokimya Anabilim Dalı Doktora Tezi, Ocak 2018Danışman: Prof. Dr. Cevat YAZICIKISA ÖZETSisplatin solid organ tümörlerinin tedavisinde yaygın olarak kullanılan oldukça etkili kemoterapötik bir ajandır. En yaygın görülen ve klinik kullanımını sınırlayan yan etkisi nefrotoksisitedir. Son yıllarda, nefrotoksisite gelişimine katılan en önemli mekanizmaların oksidatif stres ve enflamasyon olduğu öne sürülmektedir.N-asetilsistein (NAC), doğrudan radikal yakalayıcı olarak ve/veya hücre içi redükte glutatyon düzeylerini artırarak etki gösteren bir antioksidandır. Bu çalışmada, NAC'ın ratlarda sisplatinle indüklenen nefrotoksisite üzerine etkilerinin araştırılması amaçlandı. Bu amaçla, ratlar her grupta sekiz rat olmak üzere, dört gruba ayrıldı: KONT, NAC-250, CP ve CP+NAC. Sisplatin uygulaması intraperitoneal (ip) tek doz, 10 mg/kg rat ağırlığı ve NAC uygulaması ip, ardışık 3 gün, 250 mg/kg rat ağırlığı şeklinde yapıldı. Nefrotoksisite gelişimi plazma BUN, kreatinin ve idrar mikroalbümin seviyeleri ile belirlendi. Ayrıca böbrek dokularında histolojik değerlendirme yapılarak da nefrotoksisite tanısı desteklendi. Kan ve doku örneklerinde miyeloperoksidaz (MPO), nükleer faktör-kappa B (NF-B) ve `high mobility group box-1` (HMGB-1) seviyeleri ölçüldü. Sisplatinin plazma ve doku örneklerinde MPO, NF-B ve HMGB-1 düzeyleri üzerinde etkili olmadığı, ancak NAC'ın MPO ve HMGB-1 doku seviyelerini anlamlı derecede artırdığı gözlendi. Bununla birlikte, NAC böbreklerdeki fonksiyonel ve histolojik değişiklikleri iyileştirdi. Sonuç olarak, bu deneysel modelde sisplatin nefrotoksisitesine enflamasyonun katkısının sınırlı olduğu söylenebilir. Bununla birlikte, farklı kanser hücre hatlarında çok yönlü ve birbirine zıt etkiler gösterebilen NF-B ve HMGB-1'in seviyelerini etkilemeksizin, böbrek fonksiyonlarını iyileştirebilen NAC'ın; tüm kanser tiplerinde, kemoterapi etkinliğini değiştirmeksizin sisplatin yan etkilerinin azaltılmasında güvenle kullanılabileceği öne sürülebilir.. Anahtar kelimeler: Rat, sisplatin, oksidatif stres, enflamasyon, N-asetilsistein THE EFFECT OF N-ACETYLCYSTEINE AGAINST EXPERIMENTALLY INDUCED CISPLATIN NEPHROTOXICITY İnayet GÜNTÜRK Erciyes University, Graduate School of Health Sciences, Department of Biochemistry, Doctoral Dissertation, January 2018Supervisor: Prof. Dr. Cevat YAZICIABSTRACTCisplatin is a widely used and highly effective chemotherapeutic agent used in the treatment of solid organ cancers. The most common side effect that limits its clinical usage is nephrotoxicity. In recent years it has been suggested that the most important mechanisms that contribute to nephrotoxicity are oxidative stress and inflammation. N-acetylcysteine (NAC) is an antioxidant, that acts directly as a free radical scavengers and/or increase intracellular reduced glutathione. In the present study, the effects of NAC is investigated, on cisplatin induced nephrotoxicity in rats. For this purpose, rats were divided into four groups each group including eight rats: CONT, NAC-250, CP, CP+NAC. Cisplatin was administrated intraperitoneally (ip), single dose,10 mg/kg body weight and NAC was administrated ip, 250 mg/kg body weight for three consequitive days. Nephrotoxicity was determined by plasma BUN, creatinine and urine microalbumin levels. Nephrotoxicity was also supported by histological analysis in kidney tissue samples. In blood and tissue samples myeloperoxidase (MPO), nuclear factor-kappa B (NF-B) and high mobility group box-1 (HMGB-1) levels were measured. It was found out that cisplatin was not effective on MPO, HMGB-1 and NF-B levels in blood and tissue samples, however, NAC elevated MPO and HMGB-1 levels significantly. Nevertheless NAC ameliorated histological and functional changes in kidney tissues. In conclusion, it can be said that inflammation has limited effect on cisplatin nephrotoxicity in this experimental design. However NAC, which can ameliorate renal function without effecting the levels of NF-kB and HMGB-1 that have versatile and opposite effects on different cancer cell lines, is suggested to be safely used to reduce the side effects of cisplatin without altering chemotherapy efficacy for all cancer types.Keywords: Rats, cisplatin, oxidative stress, inflammation, N-acetylcysteine 116
- Published
- 2018
30. Sisplatin nefrotoksisitesi geliştirilen ratlarda n-asetilsistein (NAC) kullanımının, kalp dokusu üzerindeki etkilerinin incelenmesi
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Yücel, Bilal, Yazıcı, Cevat, and Biyokimya Anabilim Dalı
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Toxicity ,Oxidative stress ,Biyokimya ,Free radicals ,Heart ,Toxicity tests ,Cisplatin ,Nephrotoxicity ,Biochemistry ,N-acetylcysteine ,Rats - Abstract
Amaç: Sisplatin (cis-diamindikloroplatinum (II), CP) nefrotoksisitesi geliştirilen ratlara uygulanan N-asetilsistein (NAC)'in kalp dokusu üzerine koruyucu etkilerinin, çeşitli biyokimyasal ve histopatolojik belirteçlerle gösterilmesi amaçlanmıştır.Bu çalışma CP kardiyotoksisitesinin patogenezinde oksidatif ve nitrozatif stresin ortaya konulması, NAC'ın olası yan etkiler üzerine etkilerini ve sisplatin kardiyotoksisitesinin belirlenmesinde yeni biyomarkerların kullanılabilirliğini değerlendirmek amacıyla planlandı. Gereç ve yöntem: Deneysel ve Klinik Araştırma Merkezi'nden temin edilen 32 adet 300-400 gr ağırlığında Wistar albino erkek rat dört gruba ayrıldı. Tüm uygulamalar kg rat ağırlığı/gün, ip olacak şekilde: Kontrol grubuna SF (1 ml); CP, (10 mg) tek doz; NAC, (250 mg) üç doz; CP-NAC (tek doz 10 mg CP ve ardışık 3 doz 250 mg NAC, CP uygulamasından 4 saat sonra) verildi. Son uygulamayı izleyen 72. saatte, anestezik ratların heparinize kanları ve kalpleri alındı. Kalp dokuları nötral formalinle tespit edildi, histopatolojik olarak değerlendirildi. cTnI (kardiyak troponin I), kardiyak miyozin hafif zincir-1 (CMLC-1) ve iskemi modifiye albumin (İMA) plazmada; total lipid hidroperoksit (ROOH), 4-hidroksinoneal (4-HNE), 3-Nitrotirozin (3-NT), tiyol, total antioksidan (TAK) ve total oksidan (TOK) kapasite kalp dokusunda ölçüldü.Bulgular: Plazma, cTnI, CMLC-1, İMA ve doku ROOH, 4-HNE, 3-NT, TOK, düzeylerinin Kontrole göre CP grubunda arttığı; doku tiyol ve TAK düzeylerinin ise azaldığı belirlendi. Histolojik olarak CP grubunda hemoraji, interstisyel ödem ve vakuolizasyon gözlemlendi. CP grubuyla kıyaslandığında CP-NAC grubunda TAK ve tiyol değerlerinin arttığı belirlendi. Azalan cTnI, CMLC-1, İMA ve doku ROOH, 4-HNE, 3-NT, TOK düzeyleri ve histopatolojik skorlar istatiksel olarak anlamlı bulunamadı. Sonuç: CP kardiyotoksisitesi gelişiminde lipid peroksidasyonun (yüksek 4-HNE, ROOH düzeyleri) ve protein oksidasyonun (yüksek 3-NT düzeyleri) rol oynadığı söylenebilir. Düşük TAK ve tiyol ve yüksek TOK düzeyleri de bu görüşü desteklemektedir. CP kardiyotoksisitesini önlemede, bu doz ve sürede uygulanan NAC'ın antioksidan kapasiteyi artırmasına rağmen (yüksek tiyol ve TAK); gerek plazma gerekse doku düzeyinde başarısız olduğu söylenebilir. Aim: Objective is to demonstrate the protective effects of N-acetylcysteine (NAC) on heart tissue, which is applied to rats which developed cisplatin (cis-diaminedichloroplatinum (II), CP) induced nephrotoxicity, through various biochemical and histopathological indicators.The study thereof has been planned in order to evaluate the usability of new biomarkers in determining CP cardiotoxicity, and to evaluate the effects of NAC on possible side effects, and to demonstrate the oxidative and nitrosative stress regarding the CP cardiotoxicity's pathogenesis. Material and method: 32 male Wistar albino rats, each one weighing 300-400 grams and which are procured from Experimental and Clinical Research Center, have been separated into 4 groups. All applications being kg rat weight/day, ip: Control group has been applied: saline (1 ml); CP, (10 mg) single dose; NAC, (250 mg) three doses; CP-NAC (single dose 10 mg CP and successive 3 doses 250 mg NAC, 4 hours after CP application). In the 72.hour following the last practice, heparinized bloods and hearts of the rats have been taken. Heart tissues have been fixed by neutral formalin, and have been evaluated histopathologically. cTnI (cardiac troponin I), cardiac myosin light chain-1 (CMLC-1) and ischemia modified albumin(IMA) in plasma; total lipid hydroperoxide(ROOH), 4-hydroxynonenal (4-HNE), 3-Nitrotyrosine(3-NT), thiol, total antioxidant (TAC) and total (TOC) capacity has been measured on heart tissue.Results: Plasma, cTnI, CMLC-1, IMA and tissue ROOH, 4-HNE, 3-NT, TOC, levels are found to have increased in CP group; tissue thiol and TAC levels are found to have reduced. Histologically on CP group; haemorrhage, interstitial oedema and vacuolization have been observed. When compared to CP group; CP-NAC group is found to have increased in TAC and thiol values. Reduced cTnI, CMLC-1, IMA and tissue ROOH, 4-HNE, 3-NT, TOC levels and histopathological scores did not yield any histopathologically meaningful results. Conclusion: In development of CP cardiotoxicity; lipid peroxidation (high 4-HNE, ROOH levels) and protein oxidation(high 3-NT levels) can be said to have been effective. Low TAC and thiol and high TOC levels as well support this opinion. In preventing CP cardiotoxicity, despite the NAC which was applied at specified dose and duration increasing the antioxidant capacity (high thiol and TAC); it can be said to have failed. 110
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- 2016
31. Deneysel hipertiroidi oluşturulan ratlarda karnozinin antioksidan özelliklerinin incelenmesi
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Dağli, Fatma, Yazıcı, Cevat, and Biyokimya Anabilim Dalı
- Subjects
Thyroid diseases ,Thyroid gland ,Oxidative stress ,Thyroid hormones ,Biyokimya ,Carnosine ,Biochemistry ,Hyperthyroidism ,Antioxidants ,Rats - Abstract
Tiroid hormonlarının (L-tiroksin, L-triiyodotironin) aşırı üretimi sonucu oluşan hipertiroidinin, mitokondriyal solunumu hızlandırarak serbest radikal üretimini indüklediği ve oksidatif hasara yol açarak çeşitli hastalıkların etiyopatogenezinde rol oynadığı ileri sürülmektedir. Endojen bir dipeptid olan L-karnozinin antioksidan etkiler gösterdiği bildirilmiştir. Yapılan literatür taramasında, hipertiroidi oluşturulan ratlarda L-karnozinin antioksidan özelliklerini inceleyen bir çalışmaya rastlanılamamıştır.Bu çalışmada; deneysel hipertiroidi oluşturulan ratlarda, hipertiroidinin oksidan/antioksidan sistemler üzerine etkisi ve karnozin varlığında bu etkinin ne şekilde değişebileceği araştırıldı. Bu amaçla her biri 12 rattan (Wistar albino) oluşan sekiz çalışma grubu oluşturuldu. Deney gruplarındaki ratlara 10/20 gün süreyle L-tiroksin (intraperitoneal: ip, 300 µg /kg vücut ağırlığı/gün) ile pre-, post- ve kombine L-karnozin (ip, 300 mg/kg vücut ağırlığı/gün) uygulandı. Ratlardan elde edilen plazma ve dokularda (karaciğer, böbrek kalp); malondialdehit (MDA), protein karbonil bileşikleri (PCC), protein ileri oksidasyonu ürünleri (AOPP) (sadece plazmada) ve tiyol seviyeleri ölçüldü. Hipertiroidinin, yüksek MDA, PCC, AOPP ve düşük tiyol düzeyleriyle yansıtıldığı üzere lipid ve protein oksidasyonu üzerinden oksidatif strese neden olduğu, karnozin varlığında ise MDA, PCC ve AOPP düzeylerinin düştüğü ve tiyol düzeylerinin arttığı tespit edildi. Sonuç olarak dokularda oksidatif hasara yol açabilen hipertiroidi gibi patolojilerde; antioksidan özellikler gösteren karnozinin standart tedavi protokollerine ilave bir terapötik ajan olarak, hastalıktan önce ve/veya sonra kullanılması önerilebilir. Anahtar kelimeler: Rat, hipertiroidizm, oksidatif stres, karnozin, antioksidan It is suggested that hyperthyroidism which is formed as a result of excessive production of thyroid hormones (L-thyroxin, L-triiodotyronin) induces free radical production by accelerating mitochondrial respiration and plays a role in etiopathogenesis of several diseases by causing oxidative damage.It is reported that L-carnosine, a dipeptid, shows antioxidant effects. In literature scanning there isn't a study investigating the antioxidant characteristics of L-carnosine in rats with experimentally induced hyperthyroidism.In this study, it was investigated the effect of hyperthyroidism on oxidant/antioxidant systems, and how this effect would change in the presence of carnosine on experimentally induced hyperthyroidism in rats.For this purpose, eight study groups were formed and each group included twelve rats (Wistar albino). The rats in experimental groups were applied L-thyroxine (intraperitoneal: ip 300 µg/kg body weight/day) and pre-, post- and combined L-carnosine (ip, 300 mg/kg body weight/day), for 10/20 days. Malondialdehyde (MDA), protein carbonyl compounds (PCC), advanced oxidation protein products (AOPP) (only in plasma) and thiol levels were measured in the plasma, liver, kidney and heart obtained from the rats. It was found out that hyperthyroidism caused oxidative stress via lipid and protein oxidation provided by high MDA, PCC, AOPP and low thiol levels; and the levels of MDA, PCC and AOPP decreased and the levels of thiol increased in the presence of carnosine.As a result, in patologies such as hyperthyroidism which causes oxidative damages in tissues; it is suggested that carnosine which has antioxidant characteristics can be used as an additional therapeutic agent to standard treatment protocols before/after illness.Keywords: Rats, hyperthyroidism, oxidative stress, carnosine, antioxidant 172
- Published
- 2015
32. Serum vitamin D concentration is inversely associated with matrix metalloproteinase-9 level in periodontal diseases.
- Author
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Yıldırım YA, Ozturk A, Doğruel F, Saraçoğlu H, and Yazıcı C
- Abstract
Background: The aim of this study was to investigate the potential association between vitamin D deficiency and matrix metalloproteinase-9 (MMP-9) levels in gingival crevicular fluid (GCF) across various periodontal health and disease statuses., Methods: A total of 200 volunteers were divided into two groups according to serum vitamin D concentration (25(OH)D < 10 ng/mL and 25(OH)D ≥ 10 ng/mL). Periodontal health status was determined based on a full-mouth periodontal examination and radiographic evaluation. Participants in both groups were categorized according to periodontal diagnoses, encompassing periodontal health, gingivitis, and periodontitis. Following sampling, the MMP-9 levels in GCF were determined by the enzyme-linked immunosorbent assay (ELISA) method., Results: The GCF MMP-9 levels were found to be higher in individuals with serum 25(OH)D < 10 ng/mL, in both the healthy and gingivitis and periodontitis groups, compared to those with 25(OH)D ≥ 10 ng/mL. Nevertheless, a statistically significant distinction was observed exclusively within the gingivitis and periodontitis groups. Correlation analysis and robust regression analyses provided additional evidence supporting the predictive role of periodontal disease status and vitamin D concentration in local MMP-9 levels. These associations remained significant after adjusting for age and sex in robust regression analysis (p = 0.002). Furthermore, the inclusion of periodontal clinical parameters in the regression analysis revealed notable associations of clinical attachment loss with local MMP-9 levels, along with periodontal disease status and serum vitamin D concentration (p < 0.001)., Conclusion: The findings of our study suggest a potential mechanistic relationship between serum vitamin D levels and periodontitis., Plain Language Summary: Vitamin D deficiency is a widespread issue globally due to urban living, less outdoor time, seasonal changes, aging, and sunscreen use, leading to inadequate sun exposure. Low vitamin D levels are linked to several health problems, including hypertension, diabetes, heart diseases, and periodontal diseases, which affect the gums and bones around teeth and can cause tooth loss if untreated. Although the link between vitamin D and periodontal disease is unclear, it may involve the enzyme matrix metalloproteinase-9 (MMP-9). Our study examined 200 people, dividing them into two groups based on vitamin D levels. We assessed their gum health and measured MMP-9 levels in their gingival crevicular fluid, a liquid that seeps out from the tiny space between gums and teeth. We found that people with lower vitamin D levels had higher MMP-9 levels, especially those with gum disease. Our analysis showed that both vitamin D levels and gum health significantly impact MMP-9 levels, with gum health being the more influential factor. Maintaining good gum health and adequate vitamin D levels is crucial for managing MMP-9, an enzyme critical for tissue remodeling during healing and inflammation. However, excessive MMP may rapidly destroy periodontal tissues., (© 2024 The Author(s). Journal of Periodontology published by Wiley Periodicals LLC on behalf of American Academy of Periodontology.)
- Published
- 2024
- Full Text
- View/download PDF
33. Does ß-Glucan can have protective role against oxidative stress in experimental sepsis model in rats?
- Author
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Demir M, Köse K, Yazıcı C, and Sözüer EM
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- Advanced Oxidation Protein Products, Animals, Disease Models, Animal, Male, Malondialdehyde, Rats, Oxidative Stress drug effects, Protective Agents pharmacology, Sepsis metabolism, beta-Glucans pharmacology
- Abstract
Background: Very high mortality rate in sepsis may be related to oxidative stress. This study was conducted on the rats to investigate the presence of oxidative stress and also the potential protective effects of the ß-glucan in the intra-abdominal sepsis model formed by cecal ligation-perforation (CLP)., Methods: In this study, 30 Male rats were equally divided into three groups as 'Sham', 'Sepsis' and 'ß-Glucan'. Only laparotomy was performed in the Sham group, and sepsis was induced by CLP in Sepsis and ß-Glucan groups. Following CLP, a single dose of 4 mg ß-glucan/kg was also intraperitoneally administered to the β-Glucan group. Blood and tissue (liver, lung and kidney) samples were taken from Sepsis and ß-Glucan groups after sepsis development determined at the end of the 48th hour, also from the Sham group. The levels of myeloperoxidase (MPO) and advanced oxidation protein products (AOPP) were determined in plasma samples, and the malondialdehyde (MDA) was measured in plasma and tissues., Results: MPO and AOPP were higher in both the Sepsis and ß-Glucan groups; however, plasma and tissue MDA levels were higher only in the Sepsis group than the Sham group (p<0.05). However, when compared to the Sepsis group, all parameters measured, except kidney MDA, were significantly lower in the ß-Glucan group (p<0.05)., Conclusion: To our knowledge, this is the first study to investigate the AOPP levels in the CLP sepsis model, ROS produced by the reaction of MPO derived from neutrophils may form oxidative damage to the proteins, compared to the lipids, and ß-glucan may be used as an alternative agent for sepsis treatment.
- Published
- 2020
- Full Text
- View/download PDF
34. Clinical significance of progastrin-releasing peptide, neuron-specific enolase, chromogranin a, and squamous cell cancer antigen in pulmonary neuroendocrine tumors
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Tutar N, Yetkin NA, Yazıcı C, Önal Ö, Kontaş O, and Keleştemur F
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- Aged, Antigens, Neoplasm blood, Carcinoma, Non-Small-Cell Lung blood, Carcinoma, Non-Small-Cell Lung diagnosis, Carcinoma, Non-Small-Cell Lung epidemiology, Chromogranin A blood, Cross-Sectional Studies, Female, Humans, Male, Middle Aged, Predictive Value of Tests, Recombinant Proteins blood, Serpins blood, Biomarkers, Tumor blood, Lung Neoplasms blood, Lung Neoplasms diagnosis, Lung Neoplasms epidemiology, Neuroendocrine Tumors blood, Neuroendocrine Tumors diagnosis, Neuroendocrine Tumors epidemiology, Peptide Fragments blood, Phosphopyruvate Hydratase blood
- Abstract
Background/aim: It is not always easy to diagnose pulmonary neuroendocrine tumors (PNETs). The aim of the present study is to make a differential diagnosis by studying the same markers in patients with non-small-cell lung carcinoma (NSCLC), patients with benign lung disease (chronic obstructive pulmonary disease and pneumonia), and healthy volunteers to determine the roles of these markers in pulmonary neuroendocrine tumor diagnosis and to identify their power., Materials and Methods: A total of 100 participants including 23 PNET patients and 28 NSCLC patients who were pathologically di-agnosed but not yet treated, 25 participants with benign disease, and 24 healthy volunteers were included in this cross-sectional study., Results: No significant difference was found between the chromogranin A (CgA) and squamous cell carcinoma antigen 1 (SCCA1) values among the groups (PNET, NSCLC, benign, healthy volunteers), but the difference in progesterone-releasing peptide (ProGRP), neuron-specific enolase (NSE), and adjusted NSE was statistically significant (P values were respectively ProGRP, P = 0.006; NSE, P = 0.015; NSE adjusted, P = 0.09). In a comparison of the PNET and NSCLC groups, having a ProGRP value higher than 84.6 pg/mL re-vealed PNET with 60.9% sensitivity and 89.3% specificity (P = 0.001)., Conclusion: The ProGRP value is the only indicator that distinguishes the PNET group from the other 3 groups., (This work is licensed under a Creative Commons Attribution 4.0 International License)
- Published
- 2019
- Full Text
- View/download PDF
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