Person: YARAT, AYŞEN
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YARAT
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AYŞEN
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Publication Metadata only Kronik periodontitisli ve sağlıklı kişilerin tükürük örneklerinin bazı biyokimyasal parametreler ve sitolojik incelemeler açısından karşılaştırılmasında saklama süresinin belirlenmesi(2009-06-20) ALTURFAN, EBRU IŞIK; YARAT, AYŞEN; AK, ESİN; ALTURFAN E. I., YARAT A., AK E., PİŞİRİCİLER R., KURU B., NOYAN Ü.Publication Metadata only Peanut (Arachis hypogaea) consumption improves glutathione and HDL-cholesterol levels in experimental diabetes(WILEY, 2008) YARAT, AYŞEN; Emekli-Alturfan, Ebru; Kasikci, Emel; Yarat, AysenThe aim of this investigation was to assess the influence of peanut (Arachis hypogaea) consumption on oxidant-antioxidant status and lipid profile in Streptozotocin (STZ) induced diabetic rats. 32 rats were divided into 4 groups as control, control+peanut, diabetic, diabetic+peanut. Control and diabetic groups were fed on standard rat chow whereas control+peanut and diabetic+peanut were fed on standard rat chow supplemented with 0.63 g % peanut for 12 weeks. Serum glucose levels, lipids, Glutathione (GSH), lipid peroxidation (LPO) and atherogenic index (AI) levels were determined at the end of the experiment. In the diabetic group TG (Triglyceride), TC (Total cholesterol), LDL-C (LDL-cholesterol) levels and atherogenic indexes increased significantly whereas HDL-C (HDL-cholesterol) level decreased significantly compared to the control group. The supplementation with peanut in the diabetic group led to significantly higher HDL-C levels and lower AI levels compared to diabetic group. Peanut consumption increased GSH levels significantly both in control and diabetic groups. In conclusion, this study shows that peanut consumption may improve oxidant-antioxidant status in healthy and diabetic status without increasing blood lipids. Moreover, increased HDL-C levels and decreased AI levels in diabetic rats indicate that, peanut consumption may have protective effects against cardiovascular complications of diabetes. Copyright (C) 2007 John Wiley & Sons, Ltd.Publication Metadata only Edaravone ameliorates the adverse effects of valproic acid toxicity in small intestine(SAGE PUBLICATIONS LTD, 2015) YARAT, AYŞEN; Oktay, S.; Alev, B.; Tunali, S.; Emekli-Alturfan, E.; Tunali-Akbay, T.; Koc-Ozturk, L.; Yanardag, R.; Yarat, A.Valproic acid (VPA) is a drug used for the treatment of epilepsy, bipolar psychiatric disorders, and migraine. Previous studies have reported an increased generation of reactive oxygen species and oxidative stress in the toxic mechanism of VPA. Edaravone, a free radical scavenger for clinical use, can quench free radical reaction by trapping a variety of free radical species. In this study, effect of edaravone on some small intestine biochemical parameters in VPA-induced toxicity was investigated. Thirty seven Sprague Dawley female rats were randomly divided into four groups. The groups include control group, edaravone (30 mg(-1) kg(-1) day(-1)) given group, VPA (0.5 g(-1) kg(-1) day(-1)) given group, VPA + edaravone (in same dose) given group. Edaravone and VPA were given intraperitoneally for 7 days. Biochemical parameters such as malondialdehyde, as an index of lipid peroxidation(LPO), sialic acid (SA), glutathione levels and glutathione peroxidase, glutathione-S-transferase, superoxide dismutase, catalase, myeloperoxidase, alkaline phosphatase (ALP), and tissue factor (TF) activities were determined in small intestine samples by colorimetric methods. Decreased small intestine antioxidant enzyme activities, increased LPO and SA levels, and increased activities of ALP and TF were detected in the VPA group. Based on our results edaravone may be suggested to reverse the oxidative stress and inflammation due to VPA-induced small intestine toxicity.Publication Metadata only Salivary Total Sialic Acid Levels Increase in Breast Cancer Patients: A Preliminary Study(BENTHAM SCIENCE PUBL LTD, 2011) YARAT, AYŞEN; Ozturk, Leyla Koc; Emekli-Alturfan, Ebru; Kasikci, Emel; Demir, Gokhan; Yarat, AysenBreast cancer is the most common cancer in women living in the Western world, even though it occurs worldwide. Cancer and cancer therapy induce multiple oral complications including dental and periodontal disease. Saliva is a complex and dynamic biologic fluid, which reflects both oral and systemic changes. While saliva is an easily accessible body fluid, there has been little effort to study its value in cancer diagnosis. Sialic acids (SA), the end moieties of the carbohydrate chains, are biologically important and essential for functions of glycoconjugates that are reported to be altered in both blood and saliva of various cancer patients. Increased sialylation has been shown to be a characteristic feature in cancer tissue and blood in breast cancer patients. However, there is no data about salivary SA in breast cancer. The aim of this study was to evaluate salivary total sialic acid (TSA) levels in breast cancer patients who were under chemotheraphy. The study included 15 breast cancer patients in different stages and 10 healthy individuals as age-matched controls. Un-stimulated whole saliva was collected. Salivary total protein and SA levels were determined. Flow rate was calculated from salivary volume by the time of secretion. Salivary SA was significantly higher and total protein was lower in breast cancer patients compared to controls. It is concluded that sialylation may be increased in saliva of patients with breast cancer as the same way for cancer tissue and for blood. Increased salivary SA may therefore be useful as a non-invasive predictive marker for breast cancer patients and for the prevention and management of oral complications of cancer and cancer therapy to improve oral function and quality-of-life. The effects of different types of chemotherapies and different stages of the disease on salivary SA levels and salivary sialo-glycomic are worthy of being further investigated in breast cancer patients.Publication Metadata only Cytological investigation of saliva samples of disabled children(2013-07-11) ALTURFAN, EBRU IŞIK; AK, ESİN; YARAT, AYŞEN; PİŞİRİCİLER R., ALTURFAN E. I., OZBAY G., AK E., AKYÜZ S. H., YARAT A.Publication Metadata only Tissue factor activities of streptozotocin induced diabetic rat tissues and the effect of peanut consumption(WILEY, 2007) YARAT, AYŞEN; Emekli-Alturfan, Ebru; Kasikci, Emel; Yarat, AysenBackground Tissue factor (TF) is considered to be a major regulator of normal haemostasis and thrombosis. Circulating TF activity is suggested to be associated with diabetes mellitus. Various tissues and body fluids have TF activity. The aim of the present study was to investigate the TF activity of streptozotocin (STZ) induced diabetic rat tissues. Peanut consumption is reported to be associated with decreased risk of type 2 diabetes. Therefore, the effect of peanut consumption on the TF activity of STZ induced diabetic rat tissues, and haemostatic parameters such as protrombin time (PT), activated partial thromboplastin time (APTT) and fibrinogen levels were determined. Methods Twenty-four Wistar rats were divided into 3 groups of 8 rats each as control, STZ-induced diabetic and diabetic + peanut group. Twelve weeks later, TF activity of liver, kidney, spleen, heart, kidney, lung, pancreas and aorta and haemostatic parameters were determined. Results In the diabetic group, TF activities of liver, kidney and spleen increased (p < 0.01) whereas the TF activity of brain decreased (p < 0.01) compared to the control group. Peanut consumption in the diabetic group decreased the TF activity of spleen and aorta (p < 0.01; p < 0.05). Haemostatic parameters did not change significantly in the groups. Conclusion Elevated TF activity in diabetic rat tissues, may contribute to the increased risk of atherothrombotic disease that accompanies the diabetic complications whereas the decreased brain TF activity may be due to a different haemostatic mechanism to protect this vital organ from the diabetic status. The decreased TF activity of peanut given diabetic rat tissues might protect these tissues from the risk of thrombosis. Copyright (c) 2007 John Wiley & Sons, Ltd.Publication Metadata only Effect of black cumin seed oil on gastric tissues in experimental conditions(2010-11-04) ALTURFAN, EBRU IŞIK; YARAT, AYŞEN; AKBAY, TUĞBA; AK, ESİN; ALTURFAN E. I., YARAT A., AKBAY T., IŞIK F., YENİDOĞAN G., ŞENER G., ŞEHİRLİ A. Ö., PİŞİRİCİLER R., AK E., ALTINTAŞ A.Publication Metadata only The effect of Myrtus communis L. ethanol extract on the small intestine and lungs in experimental thermal burn injury(PERGAMON-ELSEVIER SCIENCE LTD, 2020) ŞEN, ALİ; Ozcan, Ozan; Ipekci, Hazal; Alev, Burcin; Ustundag, Unsal Veli; Sen, Ali; Emekli-Alturfan, Ebru; Sener, Goksel; Yarat, Aysen; Tunali-Akbay, TugbaThermal trauma can damage organs away from the skin burn site and lead to multiple organ dysfunction. Following thermal injury, all tissues are exposed to ischemia, and as a result, resuscitation and reperfusion occur during the burning shock. Burn damage starts systemic inflammatory reactions that produce toxins and reactive oxygen radicals that lead to peroxidation. This study aimed to investigate, for the first time, the possible antioxidant effects of Myrtus communis ethanol extract on burn-induced oxidative distant organ injury orally. The thermal trauma was generated under ether anesthesia by exposing the dorsum of rats to 90 degrees C water bath for 10 s. 100 mg/kg/day Mrytus communis ethanol extract was applied orally for two days. Malondialdehyde (MDA) and glutathione (GSH) levels, glutatinone-S-transferase (GST), superoxidedismutase (SOD) and catalase (CAT) activities were determined to detect the possible antioxidant effects of myrtle on small intestine and lung tissues. Burn damage significantly increased MDA levels in lung and small intestine tissues, and significantly decreased GSH levels, CAT and GST activities in the small intestine and lung tissues compared to control group. Mrytus communis ethanol extract decreased MDA level and increased GSH level, SOD, CAT and GST activities significantly in either small intestine or lung tissues. Mrytus communis extract may be an ideal candidate to be used as an antioxidant adjunct to improve oxidative distant organ damage to limit the systemic inflammatory response and decreasing the recovery time after thermal injury.Publication Metadata only Oral cerahi işlemlerinde uygulanan lokal hemostatik ajanların erken dönem yumuşak doku iyileşmesi üzerine etkilerinin incelenmesi(2023-01-01) GÖNÜL, ONUR; AK, ESİN; ALTURFAN, EBRU IŞIK; YARAT, AYŞEN; GARİP, HASAN; GÖNÜL O., AK E., ALTURFAN E. I., ARBAK S., YARAT A., PİŞİRİCİLER R., GARİP H., SATILMIŞ T., GÖKER M. K.Oral cerrahi girişimleri sonrası kanama komplikasyonlarını kontrol altına almak için ticari olarak mevcut pek çok hemostatik ajan kullanılmaktadır. Bu çalışmada, üç farklı lokal hemostatik ajanın erken dönem doku iyileşmesi üzerindeki etkileri histolojik ve sitolojik olarak değerlendirildi. Çalışmaya yarı gömük üçüncü molar diş çekimi yapılan ve çalışma kriterlerine uygun bulunan 41 gönüllü hasta dahil edildi. İşlem sonrası kullanılan hemostatik ajana göre hastalar; oral cerrahi operasyonu sonrası herhangi bir ajan kullanılmayan grup,grup I (kontrol, n=10); ile sırasıyla jelatin, kollajen ve kitosan esaslı lokal hemostatik ajan kullanılan gruplar, grup II (n=11), grup III (n=10), grup IV (n=10) olarak dört gruba ayrıldı. Cerrahi işlem sırasında ve 8. günde doku örnekleri alındı. Histolojik inceleme için her gruptaki hastalara ait dokulardan alınan 5 μm kalınlığındaki kesitlere Masson’s trichrom boyaması yapılarak ışık mikroskopisi altında incelendi. Kesitler doku harabiyeti vazokonjesyon, lökosit infiltrasyonu ve kollajen lif yapısı kriterleri kullanılanarak değerlendirildi. Sitolojik inceleme için dokulardan alınan sürüntü örnekleri May-Grünward ile boyandı. Çalışmamızda kullanılan lokal hemostatik ajanların klinik etkinlikleri yeterli bulundu, kitozan esaslı lokal hemostatik ajanın diğerlerine göre doku iyileşmesini sitolojik ve histolojik olarak daha olumlu yönde etkilediği saptandı. Klinik yararları göz önüne alındığında birçok cerrahi alanda kullanımı yaygın olan bu ajanların doku iyileşme potansiyeline etkilerinin artırılması için konuyu farklı yönlerden inceleyen çalışmaların gerekli olduğu kanısına varıldı.Anahtar kelimeler: Hemostatik ajanlar, jelatin sünger, kollajen, kitozanPublication Metadata only Fluoride levels in various black tea, herbal and fruit infusions consumed in Turkey(PERGAMON-ELSEVIER SCIENCE LTD, 2009) YARAT, AYŞEN; Emekli-Alturfan, Ebru; Yarat, Aysen; Akyuz, SerapThe fluoride contents were determined by ion-selective electrode in 26 black tea samples originally produced in Turkey, Sri Lanka, India and Kenya, and in 14 herbal and seven fruit infusions originated from Turkey. Fluoride content in black tea infusions ranged from 0.57 to 3.72 mg/L after 5 min of brewing. Higher fluoride levels were found in black teas originated from Turkey when compared with teas originated from Sri Lanka. Moreover higher fluoride levels were determined in black tea bags compared with granular and stick-shaped black teas. However, herbal and fruit infusions were characterized by low values of fluoride (0.02-0.04 mg/L) after 5 min of brewing and increasing brewing time to 10 min caused only slight increases in some infusions. As a result, consuming tea infusions prepared from some black tea available in Turkish market, especially black tea bags, in large quantities may lead to exposion to a high amount of fluoride which may cause dental fluorosis. Although fruit and herbal infusions are safer to consume their fluoride contents are too low for caries prevention. In countries such as Turkey where tea is traditionally consumed, the fluoride concentration and daily safety precautions should be indicated on tea products. (C) 2009 Elsevier Ltd. All rights reserved.