Browsing by Author "Dursun, Ali Doğan"

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Citation Count: 0
Avrupa Birliği Ülkeleri ve Türkiye’nin 2010-2021 Dönemi Toplam Antibiyotik Tüketiminin Karşılaştırılması: Akılcı İlaç Kullanımı ve Pandeminin Etkileri
(Bilimsel Tip Yayinevi, 2023) Kavruk, Murat; Uçak, Samet; Sapmaz, Burcu; Demir, Canan Çiçek; Dursun, Ali Doğan; Basic Sciences; Nutrition and Dietetics
Giriş: Antibiyotik tüketimini düşürmek adına dünya genelinde pek çok uygulama yapılmaktadır fakat bu uygulamaların karşılaştırmalı analizi ve pandemi gibi geniş çaplı değişkenler karşısındaki durumu yeterince analiz edilmemektedir. Bu kapsamda; Türkiye ve Avrupa ülkelerinin ATC grubu J01 toplam antibiyotik tüketim eğilimleri ve ülkeler arasındaki farklılıklar incelenmiş olup son dönemde yaşanan pandeminin antibiyotik tüketim verilerindeki değişime etkisi sorgulanmıştır. Materyal ve Metod: Türkiye ve 19 Avrupa ülkesinin 2010-2021 yılları arasındaki ATC grubu J01 toplam antibiyotik tüketimi (hastane + toplum) verileri birleştirilerek karşılaştırıldı. Çalışma için Avrupa Hastalık Önleme ve Kontrol Merkezi (ECDC) ve Türkiye İlaç ve Tıbbi Cihaz Kurumu (TICKK) verileri kullanılmıştır. Antibiyotik tüketim verileri, günlük 1000 hasta başına tanımlanmış günlük doz (DDD) cinsinden temsil edildi. Bulgular: Türkiye, odaklanılan dönemde en yüksek antibiyotik tüketimine sahip olmasına rağmen 2010-2015 tarihleri arasında 41.43 günlük 1000 hasta başına tanımlanmış günlük doz (DDD) ve 2016-2021 tarihleri arasında 32.24 günlük 1000 hasta başına tanım- lanmış günlük doz (DDD) antibiyotik tüketim verisi ile istatistiksel olarak (p= 0.05) anlamlı bir düşüş gösterdi. COVID-19 pandemisinin etkili olduğu 2021 yılında Avrupa’da, çalışmaya konu olan 2010-2021 yılları arasındaki en düşük düzeyi olan 14.91 günlük 1000 hasta başına tanımlanmış günlük doz (DDD)’a gerilerken Türkiye’de 2020 yılındaki kaydedilen 24.39 günlük 1000 hasta başına tanımlanmış günlük doz (DDD) seviyesine düşen antibiyotik tüketimi, 2021 yılında 26.97 günlük 1000 hasta başına tanımlanmış günlük doz (DDD) seviyesine yükseldi. Sonuç: Akılcı ilaç kullanımı uygulamaları, Türkiye için antibiyotik tüketimini azaltmada etkili olmakla birlikte, 2021 tüketim verileri ile trendin bozulduğu gözlemlenmiştir. Avrupa ülkeleri antibiyotik tüketim miktarlarında farklılık gösterse de toplamda COVID-19 pandemisi ile azalan bir tüketim durumuna girdiği tespit edilmiştir.
Citation Count: 0
Bası Yaralarında Bakım Verenlerin Hastalıkla İlgili Farkındalık Düzeyi
(2023) Seyhan, Nevra; Dursun, Ali Doğan; Basic Sciences
Amaç: Bası yaralarında hastaların birebir bakımını üstlenen kişiler hastaya etkili ve kaliteli bakım sağlayabilmeleri için hastalıkla ilgili yeterli bilgi sahibi olmalıdır. Bu çalışmanın amacı bası yarası hastalarına bakım verenlerin hastalıkla ilgili bilgi seviyesini ve farkındalık derecesini belirlemektir. Gereç ve Yöntemler: Sağlık Bakanlığı Evde sağlık hizmetleri birimi bünyesinde takip ve tedavisi yapılan 120 bası yarası hastasına birebir bakım verenler çalışmaya dahil edilmiştir. Bakım verme süresi 1 yıldan az olanlar çalışmaya dahil edilmemiştir. Bakım verenlere sosyo-demografik özelliklerini ve bası yaraları hakkındaki bilgi ve farkındalık düzeylerini belirlemeye yönelik 10 sorudan oluşan anket uygulandı. Bulgular: Bası yarası bakımı yapan kişilerin yaş ortalaması 40,57 idi (min 19-maks 74). Bakım verenle- rin %76,7’sinin (92 kişi) eğitim seviyesi ortaokul ve altındaydı. Bakım verenlerin bası yaralarına yönelik bilgi düzeylerinin ortalaması 43,33±13,68 puan olarak belirlendi. Bası yarası bakımı yapan kişilerin bilgi ve farkındalık düzeyi ortalama puanı, toplam puan ortalamasının (50 puan) altındaydı. Anket sorularına verilen doğru cevap oranları düşüktü. Bası yarası bakımı yapan kişilerin cinsiyet ve yaşlarına göre bası yarasına ilişkin bilgi ve farkındalık düzeyleri arasında anlamlı farklılık görülmedi (p>0,05),ancak bakım verme süresi ile bilgi ve farkındalık düzeyleri arasında anlamlı fark bulunmaktaydı(p<0,05). Sonuç: Bu çalışmada katılımcıların bası yarasına ilişkin bilgi ve farkındalık düzeylerinin düşük olduğu görülmüştür. Bakım verenlerin hastalık hakkındaki bilgi seviyesinin yeterli olması; dekubit ülseri oluşumunu önlemede ve tedavi süresince başarılı sonuçlar elde etmede etkili olduğu için, bu bakımı veren kişilerin eğitiminin önem arz ettiği değerlendirilmektedir.
Citation Count: 0
Clinical and Laboratory Evaluation of Acute Pericarditis Associated with Antinuclear Antibodies Positivity
(Bentham Science Publ Ltd, 2023) Dursun, Ali Dogan; Saricam, Ersin; Erdem, Hakan; Sariyildiz, Gulcin Turkmen; Ozyer, Esref Umut; Bozkurt, Engin; Cantekin, Omer Faruk; Anesthesia Program; Basic Sciences
Background Up to 30% of patients with acute pericarditis develop recurrent pericarditis. Acute pericarditis may be a manifestation of an underlying systemic autoimmune disease. Therefore, we evaluated the characteristics of patients with acute pericarditis according to antinuclear antibodies (ANA) positivity/negativity. Methods Participants with acute pericarditis and negative ANA (n=29), recurrent pericarditis with positive ANA (n=30) and healthy controls (n=11) were examined. The groups were compared using serum parameters (ANA, C-reactive protein, leucocyte count, erythrocyte sedimentation rate, total antioxidant status, nitric oxide (NO), and oxidative stress index (OSI)) and imaging techniques (electrocardiogram, echocardiography, cardiovascular magnetic resonance, and venous Doppler ultrasound). Results In females, acute pericarditis associated with ANA occurred more frequently (p<0.001). ANA-positive acute pericarditis had significantly lower NO and OSI (p<0.05 and p<0.001, respectively) and pericardial inflammation on magnetic resonance. We found a pulmonary embolism in one patient with positive ANA. Slow venous flow (SVF) occurred more often in acute pericarditis associated with ANA than in the ANA-negative group on venous ultrasound (p<0.05). The prevalence of positive ANAs was 1.6 times higher among SVF patients than in controls. Conclusion This study suggests that acute pericarditis associated with ANA is more common in middle-aged females. SVF and lower oxidative stress tests were more common in patients with ANA-associated acute pericarditis. Acute pericarditis associated with ANA could be considered as a hypercoagulable state. Therefore, all newly diagnosed pericarditis patients (especially females) should be checked for ANA positivity. Awareness of this coexistence should be promptly addressed to establish management strategies.
Citation Count: 0
Deneysel Tip 1 Diabetes Mellitusta Aralıklı Hipoksinin Kardiyak Kas Kalsiyum Homeostazisine Etkisi
(2019) Tanyeli, Ayhan; Baştuğ, Metin; Erdoğan, Derya Güzel; Dursun, Ali Doğan; Akat, Fırat; Tekin, Demet; Fıçıcılar, Hakan; Basic Sciences
Amaç Bu çalışmada; Deneysel diyabetik kardiyomiyopatide aralıklı hipoksinin kardiyak fosfolamban ve Ca+2- kalmodulin bağımlı protein kinaz II (CaMKII) düzeylerine etkisiaraştırıldı. ( Sakarya Tıp Dergisi 2019, 9(3):536-543 ) Gereç veYöntemler Wistar albino erkek sıçanlar (n = 34) dört gruba randomize edildi: kontrol (C), aralıklı hipoksi (AH), diabetes mellitus (DM) ve diabetes mellitus + aralıklı hipoksi (DM +AH). Streptozotosin (50 mg/kg, i.p.) uygulandı ve 250 mg/dL ve üzeri kan glukoz seviyeleri diabetes mellitus olarak kabul edildi. AH ve DM+ AH grupları, 3000 m yüksekliğekarşılık gelen bir basınçta 42 gün boyunca 6 saat/ gün hipoksiye tabi tutuldu. Değerlendirmede, Kruskal Wallis testi, çoklu karşılaştırma testleri ve Wilcoxon testleri kullanıldı. Bulgular Diyabetteki kilo kaybını göstermek ve ratların metabolik sağlık durumlarının takibi için rutin olarak ratlar tartıldı. AH grubundaki ağırlık artışı en fazla idi ve DM grubuen azdı. C ve DM (p= 0.003), C- DM + AH (p= 0.024), AH- DM (p= 0.001), AH- DM+ IH (p= 0.006) arasındaki farklar istatistiksel olarak anlamlı bulundu. Fosfolamban/gliseraldehit-3 fosfat dehidrogenaz (PLB/ GAPDH) grupları arasında anlamlı bir fark bulunamamıştır (p= 0.294). CaMKII/ GAPDH açısından, C ve DM; C ve DM+ AH ileAH ve DM+ AH grupları arasında istatistiksel olarak anlamlı bir fark bulundu (p <0.05). Sonuç CaMKII mRNA düzeylerinin DM ve DM+IH gruplarında azaldığı bulundu. Bununla birlikte, fosfolambanda değişiklik tespit edilmemiştir, ancak fosfolambanda meydanagelecek değişiklikler translasyon ve/veya posttranslasyonal seviyelerin etkilerinde ve protein seviyelerinde ve/ veya aktivasyonlarında meydana gelebilecek değişikliklerdeönemlidir.
Citation Count: 6
Detection of viruses by probe-gated silica nanoparticles directly from swab samples
(Elsevier, 2022) Tuna, Bilge Guvenc; Durdabak, Dilara Buse; Ercan, Meltem Kazak; Dogan, Soner; Kavruk, Murat; Dursun, Ali Dogan; Ozalp, Veli Cengiz; Basic Sciences; Nutrition and Dietetics
Viral infection has been one of the major health issues for human life. The real-time reverse transcription polymerase chain reaction (RT-PCR)-based detection has primarily been used for virus detection as a highly reliable procedure. However, it is a relatively long and multi-stage process. In addition, required skilled personnel and complex instrumentation presents difficulties in large scale monitoring efforts. Therefore, we report here a direct and fast detection method for CoV-2 genome as applied in the nose-throat swab samples without any further processing. The detection principle is based on fluorescein-loaded mesoporous silica nanoparticles capped by specific gene sequences probes immobilized on the surface of the nanoparticles. Upon hybridization with the target viral genome, the fluorescein molecules were released from the mesopores. Testing with synthetic oligonucleotides, the NSP12 gene-based detection resulted in a strong signal. Target detection time could be optimized to 15 min and the limit of detection was 1.4 RFU with 84% sensitivity with clinical samples (n = 43).
Citation Count: 0
The Effect of Different Doses Apelin 13 on Erythrocyte Deformability in Rats
(Wiley, 2019) Dursun, Ali Dogan; Ozdemir, Cagri; Comu, Faruk Metin; Kucuk, Aysegul; Arslan, Mustafa; Basic Sciences
[No Abstract Available]
Citation Count: 0
The effect of exercise intensity on ischemia/reperfusion injury and myokine profile in diabetic cardiomyopathy
(Brill Wageningen Academic, 2024) Akat,F.; Tatar,Y.; Çelik,H.; Fiçicilar,H.; Dursun,A.D.; Baştug,M.; Department of Basic English (Prep School); Basic Sciences
Diabetes is a metabolic disorder characterised by hyperglycaemia. The diabetic heart becomes more susceptible to ischemic injury. Although exercise induces a cardioprotective phenotype, the determination of accurate protocol is crucial. We compared two different exercise intensities in the diabetes model and evaluated the role of myokines in exercise-induced cardioprotection. Male, adult, Wistar albino rats were used (n = 20 each). First, animals were divided into two groups: Non-Diabetic (ND), Diabetic (DM); then groups were further divided into subgroups: Sedentary (S), Training-1 (T1 = 10 m/min, 0 inclination), and Training-2 (T2 = 20 m/min, 10 inclination). Diabetes was induced by streptozotocin (60 mg/kg; i.p.). Animals exercised on a treadmill 5 days/a week for 6 weeks. Then, hearts were attached to the Langendorff apparatus and baseline functional parameters were measured. After 30'/120'I/R protocol, infarct size was evaluated with tetrazolium chloride staining. Interleukin-6, FNDC5, and myonectin levels were measured both in the soleus and the left ventricle. We observed cardiac hypertrophy and impaired baseline LV function in diabetes. Infarct size was significantly larger in diabetics and only T1 decreased the infarct size whereas T2 further aggravated it. Moreover, post-ischemic recovery was worst in diabetic-T2 group. Irisin and myonectin levels were decreased in the soleus muscle of diabetic animals. T1 increased the myonectin levels in the left ventricle of non-diabetics, and this effect was blunted in diabetic-T1 animals. As a conclusion, light-intensity exercise is a better approach to prevent ischemic damage in diabetes besides moderate intensity may be hazardous in diabetic population. © 2024 F. Akat et al.
Citation Count: 7
Effects of Dexmedetomidine Administered Through Different Routes on Kidney Tissue in Rats with Spinal Cord Ischaemia-Reperfusion Injury
(Dove Medical Press Ltd, 2022) Sengel, Necmiye; Koksal, Zeynep; Dursun, Ali Dogan; Kurtipek, Omer; Sezen, Saban Cem; Arslan, Mustafa; Kavutcu, Mustafa; Basic Sciences
Background: Ischaemia-reperfusion (IR) injury, which can be encountered during surgical procedures involving the abdominal aorta, is a complex process that affects distant organs, such as the heart, liver, kidney, and lungs, as well as the lower extremities. In this study, we aimed to contribute to the limited literature by investigating the protective effect of dexmedetomidine, which was administered through different routes, on kidney tissue in rats with spinal cord IR injury.Methods: A total of 30 rats were randomly divided into five groups: control (C group), IR (IR group), IR-intraperitoneal dexmedetomidine (IRIPD group), IR-intrathecal dexmedetomidine (IRITD group), and IR-intravenous dexmedetomidine (IRIVD group). The spinal cord IR model was established. Dexmedetomidine was administered at doses of 100 mu g/kg intraperitoneally, 3 mu g/ kg intrathecally, and 9 mu g/kg intravenously. Histopathologic parameters in kidney tissue samples taken at the end of the reperfusion period and biochemical parameters in serum were evaluated.Results: When examined histopathologically, tubular dilatation was found to be significantly reduced in the IRIVD, IRITD, and IRIPD groups compared with the IR group (p = 0.012, all). Vascular vacuolization and hypertrophy were significantly decreased in the IRIVD, IRITD, and IRIPD groups compared with the IR group (p = 0.006, all). Tubular cell degeneration and necrosis were significantly reduced in the IRIVD, IRITD, and IRIPD groups compared with the IR group (p = 0.008, p = 0.08, and p = 0.030, respectively). Lymphocyte infiltration was significantly decreased in the IRIVD and IRITD groups compared with the IR group (p = 0.006 and p = 0.06, respectively). Conclusion: It was observed that dexmedetomidine administered by different routes improved the damage caused by IR in kidney histopathology. We think that the renoprotective effects of dexmedetomidine administered intravenously and intrathecally before IR in rats are greater.
Citation Count: 0
Effects of eccentric exercise on different slopes
(International Society of Musculoskeletal and Neuronal Interactions, 2019) Gokce,E.; Akat,F.; Dursun,A.D.; Gunes,E.; Bayram,P.; Billur,D.; Koc,E.; Interior Architecture and Environmental Design; Basic Sciences
Objectives: Eccentric contraction occurs when the muscle lengthens under tension. Damage-induced responses seen in the muscle after eccentric exercise usually experienced by sedentary individuals. This study aims to investigate muscle damage on different slopes. Methods: 32 male Wistar albino rats randomly divided into four groups: Sedentary, horizontal running, and eccentric exercise (-8°,-16°) groups. Animals ran for 90 min with the speed of 25 m/s for five days. After 48h from the last exercise, rats were sacrificed, and plasma creatine kinase (CK), heat shock protein 70 (HSP70) levels were examined. Plasma and soleus total oxidant/antioxidant status (TOS-TAS) and histological changes of soleus muscle assessed. Results: CK and HSP70 significantly increased in 16° EE group. TOS increased at 16° EE and 8° EE, but oxidative stress index (OSI) was only high at 8˚ EE group. Mononuclear cell infiltration and the angiogenesis increased in soleus after eccentric exercise, and there was a correlation with slope. Sarcomere breaks were detected in 16° EE group also in a correlation with slope. Conclusions: Consequently, sedentary individuals are vulnerable to injuries induced by eccentric contraction. Therefore, our study provides information for reconsidering rehabilitation and training programs. © 2019, International Society of Musculoskeletal and Neuronal Interactions. All rights reserved.
Citation Count: 1
Effects of eccentric exercise on different slopes
(Jmni, 2019) Gokce, Evrim; Akat, Firat; Dursun, Ali Dogan; Gunes, Emel; Bayram, Pinar; Billur, Deniz; Koc, Emine; Basic Sciences
Objectives: Eccentric contraction occurs when the muscle lengthens under tension. Damage-induced responses seen in the muscle after eccentric exercise usually experienced by sedentary individuals. This study aims to investigate muscle damage on different slopes. Methods: 32 male Wistar albino rats randomly divided into four groups: sedentary, horizontal running, and eccentric exercise (-8 degrees, -16 degrees) groups. Animals ran for 90 min with the speed of 25 m/s for five days. After 48h from the last exercise, rats were sacrificed, and plasma creatine kinase (CK), heat shock protein 70 (HSP70) levels were examined. Plasma and soleus total oxidant/antioxidant status (TOS-TAS) and histological changes of soleus muscle assessed. Results: CK and HSP70 significantly increased in 16 degrees EE group. TOS increased at 16 degrees EE and 8 degrees EE, but oxidative stress index (OSI) was only high at 8 degrees EE group. Mononuclear cell infiltration and the angiogenesis increased in soleus after eccentric exercise, and there was a correlation with slope. Sarcomere breaks were detected in 16 degrees EE group also in a correlation with slope. Conclusions: Consequently, sedentary individuals are vulnerable to injuries induced by eccentric contraction. Therefore, our study provides information for reconsidering rehabilitation and training programs.
Citation Count: 23
Effects of exercise training on anxiety in diabetic rats
(Elsevier, 2019) Caliskan, Hasan; Akat, Firat; Tatar, Yakup; Zaloglu, Nezahet; Dursun, Ali Dogan; Bastug, Metin; Ficicilar, Hakan; Basic Sciences
Diabetes mellitus (DM) is a common health problem, which manifests itself with chronic hyperglycemia and impaired insulin action. The prevalence of anxiety disorders tends to be high in the diabetic population. Exercise has a well-known anxiolytic effect, also demonstrated on rodents, but the effect of exercise on the DM-induced anxiety is still unknown. Female, Wistar albino rats were randomly divided into four groups (n=8) (C; EX; DM; DM+EX). DM was induced by injection (i.p.; 50 mg/kg) of Streptozotocin (STZ). Rats exercised in moderate intensity on the treadmill (15m/min; 5 degrees; 30 min) for 5 weeks. Anxiety-like behavior (ALB) was evaluated by Open field test (OFT) and Elevated Plus Maze (EPM). According to OFT, central time and central entry have increased with in EX but not in DM+EX. There was no difference between C and DM. Central latency time didn't differ among groups. Unsupported rearing increased in both EX and DM+EX. There was no significant decrease in DM. Freezing time was significantly increased in the DM group. Exercise training reduced freezing time both in diabetic and non-diabetic animals. EPM results were similar. Time spent in open arm was increased significantly in exercise groups compared to their sedentary matches, and freezing time data were also parallel to OFT. Our study revealed that diabetes had shown an anxiogenic effect, which was not severe, and it only manifested itself on some behavioral parameters. Exercise training was reduced anxiety-like behavior both in diabetic and non-diabetic rats. However, because of the nature of exercise studies, it is hard to separate the anxiolytic effect of exercise from the alteration of locomotion.
Citation Count: 0
Effects of Pregabalin on Kidney Tissue in Spinal Cord Ischemia Reperfusion Injured Rats
(Gazi Univ, Fac Med, 2021) Ceran, Emine Unal; Inan, Nurten; Kucuk, Aysegul; Ozer, Abdullah; Dursun, Ali Dogan; Tosun, Murat; Arslan, Mustafa; Basic Sciences
Objectives: The purpose of this study was to investigate the possible protective effects of low and high dose pregabalin that was administered in rat in a spinal cord ischemia-reperfusion (I/R) study model. Material and Method: We used 24 Wistar albino rats as subjects in our study. They were divided into 4 groups; randomized Control (C group), I/R (I/R group), I/R-low dose (30 mg/kg) pregabalin (I/R-LP group) and I/R-high dose (200 mg/kg) pregabalin (I/R-HP group). All groups have undergone a laparotomy intervention under anesthesia. In I/R group, a cross clamp was placed in the abdominal aorta just after the laparotomy for 120 minutes (to cause spinal cord ischemia injury) and then reperfusion was achieved by opening the vascular clamp. At the end of the study, kidney tissue was obtained for determining total oxidant status (TOS) and total antioxidant status (TAS) levels, histochemical and immunohistochemical determination. Results: Total Oxidative Status (TOS) enzyme activity was significantly higher in I/R group when compared to the control, I/R-LP and I/R-HP groups. Likewise, Total Antioxidant Status (TAS) enzyme activity was remarkably higher in I/R group when compared with the C, I/R-LP and I/R-HP groups. VEGF staining has yielded no expression in renal tissues. In microscopical analysis of the tissue slides which were immunohistochemically stained with p53 antibody, some crucial findings have been established as follows: As p53-expressing cells were not detected in the control group, the presence of p53-expressing cells were clearly identified at different intensities in several bowman capsules in the I/R group. However, no expression was detected in general tubules. Interestingly, p53 expression levels were prominently lower in low-dose pregabalin given group and considerably higher in the 200 mg/kg pregabalin administered group, which was more pronounced than the I/R group. Conclusion: Results established from the current study suggest that pregabalin given at different doses may have a partial protective effect in kidney tissues of rats undergone experimental spinal cord IR injury.
Citation Count: 0
Effects of pregabalin on kidney tissue in spinal cord ischemia reperfusion injured rats;
(Gazi Universitesi, 2021) Ceran,E.U.; Inan,N.; Kucuk,A.; Ozer,A.; Dursun,A.D.; Tosun,M.; Arslan,M.; Basic Sciences
Objectives: The purpose of this study was to investigate the possible protective effects of low and high dose pregabalin that was administered in rat in a spinal cord ischemia-reperfusion (I/R) study model. Material and Method: We used 24 Wistar albino rats as subjects in our study. They were divided into 4 groups; randomized Control (C group), I/R (I/R group), I/R-low dose (30 mg/kg) pregabalin (I/R-LP group) and I/R-high dose (200 mg/kg) pregabalin (I/R-HP group). All groups have undergone a laparotomy intervention under anesthesia. In I/R group, a cross clamp was placed in the abdominal aorta just after the laparotomy for 120 minutes (to cause spinal cord ischemia injury) and then reperfusion was achieved by opening the vascular clamp. At the end of the study, kidney tissue was obtained for determining total oxidant status (TOS) and total antioxidant status (TAS) levels, histochemical and immunohistochemical determination. Results: Total Oxidative Status (TOS) enzyme activity was significantly higher in I/R group when compared to the control, I/R-LP and I/R-HP groups. Likewise, Total Antioxidant Status (TAS) enzyme activity was remarkably higher in I/R group when compared with the C, I/R-LP and I/R-HP groups. VEGF staining has yielded no expression in renal tissues. In microscopical analysis of the tissue slides which were immunohistochemically stained with p53 antibody, some crucial findings have been established as follows: As p53-expressing cells were not detected in the control group, the presence of p53-expressing cells were clearly identified at different intensities in several bowman capsules in the I/R group. However, no expression was detected in general tubules. Interestingly, p53 expression levels were prominently lower in low-dose pregabalin given group and considerably higher in the 200 mg/kg pregabalin administered group, which was more pronounced than the I/R group. Conclusion: Results established from the current study suggest that pregabalin given at different doses may have a partial protective effect in kidney tissues of rats undergone experimental spinal cord IR injury. ©Copyright 2021 by Gazi University Medical Faculty
Citation Count: 0
Effects of Sevoflurane and Fullerenol C60 on the Heart and Lung in Lower-Extremity Ischemia-Reperfusion Injury in Streptozotocin-Induced Diabetes Mice
(Mdpi, 2024) Ornek, Ender; Alkan, Metin; Erel, Selin; Yigman, Zeynep; Dursun, Ali Dogan; Dagli, Asli; Arslan, Mustafa; Basic Sciences; Anesthesia Program
Background and Objectives: Lower-extremity ischemia-reperfusion injury can induce distant organ ischemia, and patients with diabetes are particularly susceptible to ischemia-reperfusion injury. Sevoflurane, a widely used halogenated inhalation anesthetic, and fullerenol C60, a potent antioxidant, were investigated for their effects on heart and lung tissues in lower-extremity ischemia-reperfusion injury in streptozotocin (STZ)-induced diabetic mice. Materials and Methods: A total of 41 mice were divided into six groups: control (n = 6), diabetes-control (n = 7), diabetes-ischemia (n = 7), diabetes-ischemia-fullerenol C60 (n = 7), diabetes-ischemia-sevoflurane (n = 7), and diabetes-ischemia-fullerenol C60-sevoflurane (n = 7). Diabetes was induced in mice using a single intraperitoneal dose of 55 mg/kg STZ in all groups except for the control group. Mice in the control and diabetes-control groups underwent midline laparotomy and were sacrificed after 120 min. The DIR group underwent 120 min of lower-extremity ischemia followed by 120 min of reperfusion. In the DIR-F group, mice received 100 mu g/kg fullerenol C60 intraperitoneally 30 min before IR. In the DIR-S group, sevoflurane and oxygen were administered during the IR procedure. In the DIR-FS group, fullerenol C60 and sevoflurane were administered. Biochemical and histological evaluations were performed on collected heart and lung tissues. Results: Histological examination of heart tissues showed significantly higher necrosis, polymorphonuclear leukocyte infiltration, edema, and total damage scores in the DIR group compared to controls. These effects were attenuated in fullerenol-treated groups. Lung tissue examination revealed more alveolar wall edema, hemorrhage, vascular congestion, polymorphonuclear leukocyte infiltration, and higher total damage scores in the DIR group compared to controls, with reduced injury parameters in the fullerenol-treated groups. Biochemical analyses indicated significantly higher total oxidative stress, oxidative stress index, and paraoxonase-1 levels in the DIR group compared to the control and diabetic groups. These levels were lower in the fullerenol-treated groups. Conclusions: Distant organ damage in the lung and heart tissues due to lower-extremity ischemia-reperfusion injury can be significantly reduced by fullerenol C60.
Citation Count: 0
Enhancement of Paclitaxel Therapeutic Effect by Aptamer Targeted Delivery in PLGA Nanoparticles
(2021) Dursun, Ali; Ucak, Samet; Poyraz, Fatma Sayan; Yilmaz, Elif; Mansuroglu, Banu; Ozalp, Veli Cengiz; Basic Sciences
Objectives: Paclitaxel is a drug molecule used in the therapy of various cancer types, including breast cancer. It is one of the preferred chemotherapy agent due to its high efficacy. However, many side effects have been observed associ- ated with paclitaxel use such as allergy, hair loss, diarrhea and pain. Methods: We evaluated therapeutic efficacy of paclitaxel when it is actively targeted to breast cancer tumours inside a polymeric nanoparticle. Targeted delivery of paclitaxel to tumour sites has been reported as an improved cytotoxicity strategy with a variety of nanoparticles. In this study, poly Lactic-co-Glycolic Acid (PLGA) nanoparticles were used as drug carrier and nucleolin aptamers as affinity targeting agents. Results: Paclitaxel molecules were entrapped during the synthesis of PLGA nanoparticles of 238 nm in diameter. The encapsulation and loading efficiencies of paclitaxel was 97% and 21% respectively. The paclitaxel loaded PLGA nanoparticles were functionalized with nucleolin aptamers and their targeting ability to cultured mouse cancer cells was determined for two cell lines (E0771 and 4T1). E0771 cell line was chosen for the preparation of allograph breast cancer mouse models. Evaluations of the targeted paclitaxel in PLGA nanoparticles showed 38% better performance in inhibiting tumour growth compared to free paclitaxel treatment groups of mouse models. Conclusion: The chemotherapeutic effect of cancer drugs like paclitaxel can be increased by loading inside tumour targeted polymeric nanoparticles
Citation Count: 6
The Evaluation of Oxidative Stress in the Young Adults with COVID-19 mRNA Vaccines Induced Acute Pericarditis- Myopericarditis
(Dove Medical Press Ltd, 2022) Dursun, Ali Dogan; Saricam, Ersin; Sariyildiz, Gulcin Turkmen; Iscanli, Murat Dogan; Cantekin, Omer Faruk; Anesthesia Program; Basic Sciences
Background: During COVID-19 pandemic, several vaccines have been developed such as mRNA vaccines. However, acute pericarditis and myocarditis/myopericarditis cases have been described after mRNA vaccination. The mechanism for the development of cardiac involvement is unknown. Potential mechanism for oxidative stress associated with vaccine-induced heart involvement is unidentified. This study aimed to examine the role of oxidative stress and the heart involvement in young adults vaccinated with COVID-19 mRNA vaccines. Methods: In this cross-sectional study, a total of 23 participants were included and 10 of these participants were asymptomatic patients (control group). Comparison of the cardiac involvement and control group was made by using troponin I, C-reactive protein (hsCRP), D-dimer levels, and oxidative stress tests including nitric oxide, and imaging techniques (ECG, echocardiography, cardiovascular magnetic resonance). Results: The median age of acute pericarditis group (10 patients) was 22 years (Q1-Q3: 18.5-31), and the mean age was 24.4 +/- 7.5 years. The median age of myopericarditis group (3 patients) was 22 years (Q1-Q3 18.0-25.0), and the mean age was 21.6 +/- 3.5 years. All the myopericarditis cases were male. The patients with myopericarditis had higher troponin I level, hsCRP, and D-dimer levels (troponin I level; 1600.00 ng/mL; D-dimer; 1.20 mu g/mL, hsCRP; 3.0 mg/L, respectively; p < 0.05). Serum nitric oxide levels and OSI (total oxidant status, H2O2/total antioxidant status) were lower in myopericarditis group than the control and acute pericarditis group (p < 0.05). This shows inflammatory and procoagulant state. Conclusion: Vaccine-induced myopericarditis cases are associated with oxidative stress test abnormality (abnormal NO, OSI levels). However, there is no relationship between NO levels and other oxidative stress tests difference in vaccine-induced acute pericarditis. It is thought that vaccine-induced pericarditis and myopericarditis could have different pathogenesis. This could make it necessary to reassess the second dose of vaccination for vaccine-induced cardiac involvement cases.
Citation Count: 1
The Evaluation of Serum Endocan, Interleukin-6, and CRP Levels Following Sleeve Gastrectomy
(Dove Medical Press Ltd, 2023) Sariyildiz, Gulcin Turkmen; Demir, Canan Cicek; Demir, Mehmet Emin; Arslan, Aykut Ilker; Banli, Oktay; Dursun, Ali Dogan; Basic Sciences; Anesthesia Program
Background: The excessive accumulation of fat tissue in obesity is the source of chronic low-level inflammation and causes future dysmetabolic and cardiovascular disorders. Removal of this excessive fat tissue with the aid of bariatric surgery (BS) techniques, such as sleeve gastrectomy, may reverse adverse inflammatory outcomes. The aim of this study is to investigate the impact of sleeve gastrectomy on inflammatory markers, specifically endocan, IL-6, and CRP, in individuals with obesity.Methods: Thirty-two patients with class 3 obesity and class 2 obesity + comorbidities were enrolled in the study. Clinical characteristics including age, comorbidity, body mass index (BMI), waist, and hip circumferences of the participants were noted before and 3 months after sleeve gastrectomy. Blood samples were collected during those periods to assess biochemical features such as serum endocan, interleukin-6 (IL-6), C-reactive peptide, fasting insulin, glycosylated hemoglobin A1c levels, and lipid panel. A statistical package program was used for the analysis of those parameters, and p<0.05 was accepted as significant at a 95.0% confidence interval.Results: BMI reduced from 43.55 +/- 6.78 to 36.16 +/- 6.14 kg/m(2) within 3 months following BS (p<0.001). Preoperative serum endocan, IL-6, and CRP levels were correlated with BMI, and in line with BMI reduction, their serum levels decreased after BS (p<0.05). HOMA-IR also reduced after BS, and both in the pre and post-BS periods correlated with BMI, IL-6, endocan, and CRP levels (p<0.05). The mean total body weight loss was 20.4% within 3 months post-BS.Conclusion: BS techniques are effective in weight loss and reversing the inflammatory processes caused by obesity. Serum endocan, IL-6, and CRP levels are promising markers for describing obesity-related inflammation and objectively checking the alleviation of inflammation following BS.
Citation Count: 0
Evaluation of the efficacy of silymarin and dexmedetomidine on kidney and lung tissue in the treatment of sepsis in rats with cecal perforation
(Spandidos Publ Ltd, 2024) Yavuz, Aydin; Kucuk, Aysegul; Ergorun, Aydan Iremnur; Dursun, Ali Dogan; Yigman, Zeynep; Alkan, Metin; Arslan, Mustafa; Basic Sciences
Sepsis is a systemic inflammatory response syndrome that develops in the host against microorganisms. This response develops away from the primary infection site and results in end-organ damage. The present study aimed to investigate the protective and therapeutic effects on lung and kidney tissue of silymarin (S) and dexmedetomidine (DEX) applied 1 h before and after sepsis induced by the cecal ligation and puncture (CLP) method in rats. A total of 62 rats was randomly divided into eight groups: i) Control (n=6); ii) cecal perforation (CLP; n=8); iii) S + CLP (n=8; S + CLP; S administered 1 h before CPL); iv) CLP + S (n=8; S administered 1 h after CLP); v) DEX + CLP (n=8; D + CLP; DEX administered 1 h before CLP); vi) CLP + D (n=8; DEX administered 1 h after CLP); vii) SD + CLP (n=8; S and DEX administered 1 h before CLP) and viii) CLP + SD (n=8; S and DEX administered 1 h after CLP). After the cecum filled with stool, it was tied with 3/0 silk under the ileocecal valve and the anterior surface of the cecum was punctured twice with an 18-gauge needle. A total of 100 mg/kg silymarin and 100 mu g/kg DEX were administered intraperitoneally to the treatment groups. Lung and kidney tissue samples were collected to evaluate biochemical and histopathological parameters. In the histopathological examination, all parameters indicating kidney injury; interstitial edema, peritubular capillary dilatation, vacuolization, ablation of tubular epithelium from the basement membrane, loss of brush border in the proximal tubule epithelium, cell swelling and nuclear defragmentation; were increased in the CLP compared with the control group. Silymarin administration increased kidney damage, including ablation of tubular epithelium from the basement membrane, compared with that in the CLP group. DEX significantly reduced kidney damage compared with the CLP and silymarin groups. The co-administration of DEX + silymarin decreased kidney damage, although it was not as effective as DEX-alone. To conclude, intraperitoneal DEX ameliorated injury in CLP rats. DEX + silymarin partially ameliorated injury but silymarin administration increased damage. As a result, silymarin has a negative effects with this dosage and DEX has a protective effect. In the present study, it was determined that using the two drugs together had a greater therapeutic effect than silymarin and no differences in the effects were not observed any when the application times of the agents were changed.
Citation Count: 0
Investigation of Analgesic Minimum Effective Dose of Apelin-13 With Different Doses of Intraperitoneal Injections and its Effects on Kidney Tissue
(Wiley, 2020) Dursun, Ali; Ozdemir, Cagri; Sezen, Saban; Kucuk, Aysegul; Arslan, Mustafa; Basic Sciences
[No Abstract Available]
Citation Count: 0
Investigation of SARS-CoV-2 antibody levels after COVID-19 vaccine in chronic hepatitis B patients
(Aepress Sro, 2024) Kinikli, Sami; Afsar, Fatma Elcin; Dursun, Ali Dogan; Aksoy, Altan; Karahan, Gizem; Cesur, Salih; Urtimur, Ufuk; Basic Sciences
AIM: The aim was to compare SARS-CoV-2 IgG antibody levels in chronic hepatitis B patients and healthcare personnel selected as the control group and to determine factors such as age, gender, vaccine type, and number of vaccines that may affect the antibody levels. MATERIALS AND METHODS: 87 chronic hepatitis B (CHB) patients followed in Ankara Training and Research Hospital Infectious Diseases Clinic and Mamak State Hospital Infectious Diseases outpatient clinic and 89 healthcare personnel selected as the control group were included in the study. SARS-CoV-2 IgG antibody levels in the serum samples of patients and healthcare personnel who received the COVID-19 vaccine were studied with the ELISA method in the Microbiology Laboratory of Ankara Training and Research Hospital, using a commercial ELISA kit (Abbott, USA) in line with the recommendations of the manufacturer. In the study, SARS-CoV-2 IgG levels were compared in CHB patients and healthcare personnel. In addition, the relationship between SARS-CoV-2 antibody level, gender, average age, natural history of the disease, number of vaccinations, vaccine type (Coronavac TM vaccine alone, BNT162b2 vaccine alone or Coronavac TM and BNT162b2 vaccine (heterologous vaccination)), treatment duration of CHB was investigated. Statistical analyses were made in the SPSS program. A value of p <= 0.05 was considered statistically significant. FINDINGS: A total of 167 people, including 87 CKD patients and 80 healthcare personnel as the control group, were included in the study. SARS-CoV-2 IgG antibody levels were detected above the cut-off level in the entire study group, regardless of the vaccine type. No difference was detected in SARS-CoV-2 IgG titers after COVID-19 vaccination between CHB patients and healthcare personnel. There was a statistically significant difference in SARS-CoV-2 IgG antibody levels among individuals participating in the study according to vaccine types. Compared to those who received Coronavac TM vaccine alone, the average SARS-CoV-2 IgG level was found to be statistically significantly higher in those who received BNT162b2 vaccine alone or heterologous vaccination with Coronavac TM + BNT162b2 vaccine. There was no difference between the groups in terms of age, gender, number of vaccinations, natural transmission of the disease, and duration of antiviral therapy in the CHD patient group. CONCLUSION: As a result, SARS-CoV-2 IgG antibody levels above the cut-off value were achieved with Coronavac TM and BNT162b2 vaccines in both CHD patients and healthy control groups. however, both CHD patients and healthcare personnel had higher antibody levels than those who received BNT162b2 alone or those who received heterologous vaccination had higher antibody levels than those with Coronavac TM alone. Therefore, if there are no contraindications, BNT162b2 vaccine may be preferred in CHB and health personnel (Tab. 2, Ref. 14) .