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Öğe A Cannabinoid Ligand, Anandamide, Exacerbates Endotoxin-Induced Uveitis in Rabbits(Mary Ann Liebert Inc, 2011) Altinsoy, Ali; Dilekoz, Ergin; Kul, Oguz; Ilhan, Sevil O.; Tunccan, Ozlem G.; Seven, Ilgim; Ercan, Zeynep SevimPurpose: This study aimed to investigate the effects of anandamide or arachidonylethanolamide (AEA), an endogenous cannabinoid receptor agonist, on intraocular inflammation in an endotoxin-induced uveitis (EIU) model in rabbits. Methods: Forty New Zealand albino male rabbits were used (5 groups, 8 animals in each). After establishment of sufficient anesthesia, animals were taken under surgery for intravitreal injections. A maximum amount of 50 mu L of solution was injected into the central vitreous with a 30-gauge needle. In the control group, sterile saline was injected into the right eyes of the animals. Likewise, AEA (10(-5) M) in the second group, lipopolysaccharide (LPS; 100 ng) in the third group, and AEA (10(-5) M) and LPS (100 ng) in the fourth group were administered. Fifth group received 0.1 mL subtenon injection of AM251 (10(-5) M), a CB(1)-receptor antagonist, 30 min prior to intravitreal LPS (100 ng) and AEA (10(-5) M) injection. At 24 h after the surgical intervention, clinical evaluation was performed and animals were then euthanized with 100 mg/kg intravenous pentobarbital injections. Immediately after the induction of pentobarbital anesthesia, the anterior chamber of the eyes was quickly punctured using a 30-gauge needle to drain aqueous humor (AH) and obtained specimens were used for cell count, protein measurement, and microbiological contamination tests. After AH collection, enucleation was performed and enucleated material was kept for the pathological evaluation. Results: AEA caused an overall worsening of EIU in studied eyes. It significantly increased the detrimental effects of endotoxin, as assessed by clinical investigation of ocular inflammation, AH leukocyte content, and AH protein concentrations. CB(1)-receptor antagonist AM251 administration reversed some components of this AEA-induced exacerbation to significant extents. Conclusion: AEA exacerbated EIU in rabbit eyes. AM251 has been found beneficial to prevent AEA's aggravating impact on EIU. As AEA is a treatment choice for lowering intraocular pressure in ophthalmology practice, concurrent use of CB(1)-receptor antagonists may be a questionable strategy in cases of secondary glaucoma, to avoid aggravation of the present inflammation.Öğe Central nervous system and skull malformations associated with Bovine Viral Diarrhea Virus in a calf(Ankara Univ Press, 2012) Atmaca, Hasan Tarik; Dincel, Gungor Cagdas; Kumandas, Ali; Kul, Oguz; Orhan, Ismail OnderIn this study, cranial anomalies, hydranencephaly and cerebellar hypoplasia were reported macroscopically, microscopically and immunohistochemically in a calf. A relationship between Bovine Viral Diarrhea Virus infection and malformations associated with central nervous system lesions were demonstrated.Öğe Clinicopathologic diagnosis of cutaneous toxoplasmosis in an Angora cat(Schluetersche Verlagsgesellschaft Mbh & Co Kg, 2011) Kul, Oguz; Atmaca, Hasan Tarik; Deniz, Ahmet; Suer, CenkThis report deals with a case of cutaneous toxoplasmosis in a 2 year-old female Angora cat. Cutaneous lesions were characterized by prescapular ulcers and hyperemic nodules in the skin of the inguinal and dorsosacral regions. A skin biopsy sample was collected from the lesioned area and processed for histopathologic examination and immunoperoxidase test using Toxoplasma gondii and Neospora caninum specific antibodies. Toxoplasma gondii immunopositive reactions were detected in keratinocytes and dermal macrophages while no immunoreactivity was detected for N. caninum. The case of cutaneous toxoplasmosis was further confirmed by PCR analysis using T gondii B1 gene-specific primers. In conclusion, we report the first case of cutaneous toxoplasmosis in Angora cats.Öğe COVID-19 FARMAKOTERAPİSİ(2020) Dikmen, Begüm Yurdakök; Pat, Yağız; Dilekoz, Ergin; Summak, Gökçe Yağmur; Kul, Oguz; Filazi, AyhanSARS-CoV-2'nin neden olduğu yeni koronavirüs hastalığı (COVID-19) global bir pandemi olarak tanımlanmıştır. Tüm dünyada yoğun araştırmalara karşın halen etkili bir tedavisi veya aşısı bulunmamaktadır. Bu nedenle korunma, erken virüs tespiti ve tanımlanma yöntemleri hastalığın kontrolü için önem taşımaktadır. Kontrollü randomize klinik araştırmaların sonuçları ile sürekli olarak tedavi protokolleri güncellenmektedir; ancak çok sayıda hasta ile yapılan araştırmaların çoğunluğu halen devam etmektedir. Bireysel farklılıklara (değişen fenotip, diğer kronik hastalıklar gibi) bağlı ilaç etkinliği ve güvenirliğine ilişkin değişiklikler nedeniyle tedavide tek tip ilaç uygulaması bulunmamaktadır. Tedavi protokolleri sürekli güncellenmektedir ve yapay zeka/in siliko araştırmalarla yeni ilaçların geliştirilmesi ve ilaç yeniden konumlandırma araştırmaları hızla devam etmektedir. Bu derleme, COVID-19 tedavisinde kullanılan bazı ajanlar hakkında güncel bilgi sunmaktadır.Öğe The Effect of Chlorpyrifos on Isolated Thoracic Aorta in Rats(Hindawi Ltd, 2013) Yildirim, Ebru; Baydan, Emine; Kanbur, Murat; Kul, Oguz; Cinar, Miyase; Ekici, Husamettin; Atmaca, NurgulThis study investigated the effect of chlorpyrifos on thoracic aorta and on the level of NO in plasma and aorta. The effect of chlorpyrifos on thoracic aorta in organ bath was determined in 10 rats. Another 45 rats were assigned to 3 groups with 15 rats each: control group 1 received distilled water, control group 2 was given corn oil, and the last group was given 13.5 mg/kg chlorpyrifos dissolved in corn oil every other day for 8 weeks orally. Chlorpyrifos (10(-10) M-10(-5) M) showed no effect on isolated thoracic aorta. Plasma AChE activity was decreased, while LDH, ALT, GGT, and AST activities were increased in chlorpyrifos group compared to control groups. Plasma NO level was increased in chlorpyrifos group compared to control groups. iNOS expression was present in all groups in the cytoplasm of the endothelia and in the smooth muscle cells of aorta. According to semiquantitative histomorphological analysis, iNOS immunopositive reactions were seen in the decreasing order in chlorpyrifos, control 2, and control 1 groups. eNOS immunopositive reactions were observed in the endothelial cell cytoplasm, rarely in the subintimal layer, and the smooth muscle cells of aorta. There were no differences among the groups in terms of eNOS immunostaining. In conclusion, chlorpyrifos induced NO production in aorta following an increase in NOS expression.Öğe The effect of endothelin receptor antagonists in the endotoxin-induced uveitis rabbit model(Taylor & Francis Ltd, 2018) Karaca, Emine Esra; Uzun, Feyzahan; Dilekoz, Ergin; Fincan, Gokce Sevim Ozturk; Ercan, Sevim; Kul, Oguz; Or, MeralPurpose: To investigate the effect of Bosentan (non-selective endothelin receptor antagonist) and BQ123 (ETA receptor antagonist) on intraocular inflammation in an endotoxin-induced uveitis (EIU) rabbit model.Methods: Uveitis was induced by intravitreal injection of lipopolysaccharide (LPS). The animals were divided into 7 groups and there were six rabbits in each group (saline, saline and ethanol, bosentan, BQ123, lipopolysaccharide (LPS), bosentan and LPS, BQ123 and LPS-injected groups). Bosentan and BQ123 were applied before LPS injection. Aqueous humour was collected at 24th hour post-injections and enucleation was performed for the evaluation of histopathological changes.Results: BQ123 decreased clinical score, cell counts and protein amount more than bosentan and it was significant for cell counts (p=0.018). Bosentan significantly diminished inflammatory reactions more than BQ123 as shown in histopathological specimens (p=0.002).Conclusions: ETA receptor blockage is effective on uveitis treatment by its protective effect on blood aqueous barrier.Öğe Effect of glucosamine chondroitine sulphate on repaired tenotomized rat Achilles tendons(Turkish Joint Diseases Foundation, 2011) Ozer, Hamza; Taskesen, Anil; Kul, Oguz; Selek, Hakan Y.; Turanli, Sacit; Kose, KenanObjectives: We evaluated the effects of glucosamine chondroitine sulphate (glcN-CS) on rat Achilles tendons in this experimental animal study. Materials and methods: Thirty Wistar albino type rats weighing 300-350 g were randomly grouped into two. Group A: Achilles tendons were tenotomized, repaired and, glcN-CS given orally. Group B: Achilles tendons were tenotomized and repaired. All the rats were fed with pellet chow. Five rats in each group were sacrificed at 4, 8, and 12 weeks interval. Tensile strength of three tendon specimen from each group were tested biomechanically and two specimen were analysed histopathologically via immunohistochemical staining and hematoxylin and eosin staining. Contralateral side Achilles tendons were also grouped and analyzed as controls (group C and D). Results: Histological results showed well organized collagen formation and less inflammation in group A. Biomechanical testing showed higher tendon strength in group A at eight weeks which is not statisticaly significant (55.3 +/- 4.84N, p=0.078). Rats which were were given glcN-CS had greater tendon strength which is statisticaly significant (50.01 +/- 5.62, p=0.014). Conclusion: Glucoseamine chondroitine sulphate improved results of Achilles tendon healing in rats. This result might be due to decreased inflammation and stimulation of collagen synthesis. Although glcN-CS is recommended only in osteoarthritic patients to relieve symptoms and signs it can also be prefered in treatment of soft tissue injuries formed during sports activities.Öğe Effect of Platelet-Rich Fibrin on Peripheral Nerve Regeneration(Lippincott Williams & Wilkins, 2016) Senses, Fatma; Onder, Mustafa E.; Kocyigit, Ismail D.; Kul, Oguz; Aydin, Gueluemser; Inal, Elem; Tekin, UmutPurpose:This study aimed to evaluate the effect of platelet-rich fibrin (PRF) on peripheral nerve regeneration on the sciatic nerve of rats by using functional, histopathologic, and electrophysiologic analyses.Materials and Methods:Thirty female Wistar rats were divided randomly into 3 experimental groups. In group 1 (G1), which was the control group, the sciatic nerve was transected and sutured (n=10). In group 2 (G2), the sciatic nerve was transected, sutured, and then covered with PRF as a membrane (n=10). In group 3 (G3), the sciatic nerve was transected, sutured by leaving a 5-mm gap, and then covered by PRF as a nerve guide (n=10). Functional, histopathologic, and electrophysiologic analyses were performed.Results:The total histopathologic semiquantitative score was significantly higher in G1 compared to G2 and G3 (P<0.05). Myelin thickness and capillaries were significantly lower in G3 compared to G1 (P<0.05). There was no statistically significant difference between the groups with regard to the functional and electrophysiologic results.Conclusion:The study results suggest that PRF decreases functional recovery in sciatic nerve injury. Further studies are required to determine the efficacy of PRF on peripheral nerve regeneration.Öğe Effects of ozone therapy and taurine on ischemia/reperfusion-induced testicular injury in a rat testicular torsion model(Tubitak Scientific & Technical Research Council Turkey, 2014) Aydos, Tolga Resat; Basar, Mehmet Murad; Kul, Oguz; Atmaca, Hasan Tank; Uzunalioglu, Tuba; Kisa, Ucler; Efe, Oguzhan EkinBackground/aim: To investigate the effect of ozone and/or taurine treatment comparatively on testicular damage due to ischemia/reperfusion (I/R) injury in an experimental torsion model in rats. Materials and methods: Adult Wistar rats with and without torsion/detorsion were used. In order to monitor the effect of ozone and/or taurine treatment on testicular damage due to I/R injury, following histopathological investigation apoptotic indexes were scored by TUNEL method. Moreover, tumor necrosis factor receptor 1 (TNFR1), caspase 3, caspase 8, endothelial nitric oxide synthase (eNOS), tumor necrosis factor alpha (TNF alpha), and cytochrome C immunostainings were performed and the levels of malondialdehyde, glutathione peroxidase, superoxide dismutase, catalase, total sulthydryl, and nitric oxide were determined in the testicular tissue. Results: Intraperitoneal ozone and/or taurine treatment prevented both histopathological damage and increase in the apoptotic index. Torsion did not exert an effect on the levels of TNFa and cytochrome C. Ozone and/or taurine treatment prevented increases in TNFR1, caspase 3, and caspase 8. The level of oxidative stress markers was unchanged. The increases in NO level and eNOS expression were prevented by ozone and/or taurine treatment in I/R groups. Conclusion: Using ozone therapy and/or taurine before reperfusion may be a solution for germ cell degeneration resulting from testicular torsion and related infertility.Öğe Effects of prebiotic oligofructose-enriched inulin on gut-derived uremic toxins and disease progression in rats with adenine-induced chronic kidney disease(Public Library Science, 2021) Melekoglu, Ebru; Cetinkaya, M. Alper; Kepekci-Tekkeli, S. Evrim; Kul, Oguz; Samur, GulhanRecent studies suggest that dysbiosis in chronic kidney disease (CKD) increases gut-derived uremic toxins (GDUT) generation, leads to systemic inflammation, reactive oxygen species generation, and poor prognosis. This study aimed to investigate the effect of oligofructose-enriched inulin supplementation on GDUT levels, inflammatory and antioxidant parameters, renal damage, and intestinal barrier function in adenine-induced CKD rats. Male Sprague-Dawley rats were divided into control group (CTL, n = 12) fed with standard diet; and CKD group (n = 16) given adenine (200 mg/kg/day) by oral gavage for 3-weeks to induce CKD. At the 4th week, CKD rats were subdivided into prebiotic supplementation (5g/kg/day) for four consecutive weeks (CKD-Pre, n = 8). Also, the control group was subdivided into two subgroups; prebiotic supplemented (CTL-Pre, n = 6) and non-supplemented group (CTL, n = 6). Results showed that prebiotic oligofructose-enriched inulin supplementation did not significantly reduce serum indoxyl sulfate (IS) but did significantly reduce serum p-Cresyl sulfate (PCS) (p = 0.002) in CKD rats. Prebiotic supplementation also reduced serum urea (p = 0.008) and interleukin (IL)-6 levels (p = 0.001), ameliorated renal injury, and enhanced antioxidant enzyme activity of glutathione peroxidase (GPx) (p = 0.002) and superoxide dismutase (SOD) (p = 0.001) in renal tissues of CKD rats. No significant changes were observed in colonic epithelial tight junction proteins claudin-1 and occludin in the CKD-Pre group. In adenine-induced CKD rats, oligofructose-enriched inulin supplementation resulted in a reduction in serum urea and PCS levels, enhancement of the antioxidant activity in the renal tissues, and retardation of the disease progression.Öğe eNOS and iNOS trigger apoptosis in the brains of sheep and goats naturally infected with the border disease virus(F Hernandez, 2015) Dincel, Gungor Cagdas; Kul, OguzIn this study, apoptotic and anti-apoptotic mechanisms and if present, which pathway to trigger the apoptosis in the brains of Border Disease Virus (BDV) infected lambs (n=10) and goat kids (n=5) were investigated. Briefly, apoptotic (caspase 3, caspase 9) and anti-apoptotic markers (Bcl-2), cytokine response (TNF-alpha, INF-gamma), reactive gliosis and myelin loss were examined. eNOS, iNOS, caspase 9, caspase 3 and GFAP expressions were higher in BDV infected tissues compared to control animals (6 kids and 6 lambs) (p<0.05). Double immunoperoxidase test revelaed that TUNEL positive apoptotic cells showed significant association with increased eNOS-iNOS and iNOS-BDV expressions. However, no significant differences were found for TNFR1, TNF-alpha and INF-gamma expressions in BD (p>0.05). There was a positive correlation between the intensity of myelin loss, GFAP activity and severity of infection. Inconclusion, as a novel finding, it is established that eNOS and iNOS overexpressions are co-associated with apoptosis in BDV infected neurons and neuroglia. The results also strongly suggested that BDV infected apoptotic cells mainly prefer the intrinsic pathway that might be most likely related to increased nitric oxide levels.Öğe Experimental Chronic Toxoplasmosis Model in Mice: Brain Lesions and Related Behavioral Changes(Galenos Yayincilik, 2012) Kocak, Orhan Murat; Atmaca, Hasan Tarik; Terzi, Osman Safa; Buyukkayaer, Seyhan; Ozdemir, Hatice; Uzunalioglu, Tuba; Kul, OguzObjective: In this study, it is aimed to constitute a chronic toxoplasmosis model using toxoplasma gondii (T. gondii) ME49 strain that is supposed to produce tissue cysts, to compare healthy and infected mice in terms of behavioral changes. In addition, the relationship between behavioral changes and brain lesions was questioned. Method: Before experimental application, out of a total of twenty-one 2-month-old Swiss albino mice, T. gondii antibody-free, 14 were infected by intraperitoneal (IP) (n=8) or oral (n=6) inoculation of 2x102 Toxoplasma gondii ME49 oocysts. Four months later, fear-and anxiety-related behavioral changes in infected and healthy control groups were comparatively evaluated with plus-maze test. At the end of the experiment (45 day after inoculation), euthanasia was carried out on all mice and their brains were examined histopathologically and immunohistochemically for the presence of T. gondii tissue cysts. Results: Infected mice had low levels of anxiety, they have entered the open arms more frequently and have spent more time in the open arms of the maze compared to controls. Pathologically, in the infected group, high rates of gliosis, perivascular cell infiltration, meningitis, and neuron necrosis were observed especially in the parietal and temporal lobes, cornu ammonis, amygdala, and thalamus compared to the other parts of the brain. A higher number of tissue cyst formations were positively correlated with the lesion severity in these parts of the brain. Conclusion: It can be suggested that, tissue cysts and neuropathological changes in chronically infected mice brains have direct concern with behavioral manipulation which results from low anxiety levels. (Archives of Neuropsychiatry 2012; 49: 139-144)Öğe Genetic analysis of PALB2 gene WD40 domain in canine mammary tumour patients(Wiley, 2024) Cildir, Ozge Sebnem; Ozmen, Ozge; Kul, Selim; Risvanli, Ali; Ozalp, Gozde; Sabuncu, Ahmet; Kul, OguzBackground: DNA repair mechanisms are essential for tumorigenesis and disruption of HR mechanism is an important predisposing factor of human breast cancers (BC). PALB2 is an important part of the HR. There are similarities between canine mammary tumours (CMT) and BCs. As its human counterpart, PALB2 mutations could be a predisposing factor of CMT. Objectives: In this study, we aimed to investigate the impacts of PALB2 variants on tumorigenesis and canine mammary tumor (CMT) malignancy. Methods: We performed Sanger sequencing to detect germline mutations in the WD40 domain of the canine PALB2 gene in CMT patients. We conducted in silico analysis to investigate the variants, and compared the germline PALB2 mutations in humans that cause breast cancer (BC) with the variants detected in dogs with CMT. Results: We identified an intronic (c.3096+8C>G) variant, two exonic (p.A1050V and p.R1354R) variants, and a 3 ' UTR variant (c.4071T>C). Of these, p.R1354R and c.4071T>C novel variants were identified for the first time in this study. We found that the p.A1050V mutation had a significant effect. However, we could not determine sufficient similarity due to the differences in nucleotide/amino acid sequences between two species. Nonetheless, possible variants of human sequences in the exact location as their dog counterparts are associated with several cancer types, implying that the variants could be crucial for tumorigenesis in dogs. Our results did not show any effect of the variants on tumor malignancy. Conclusions: The current project is the first study investigating the relationship between the PALB2 gene WD40 domain and CMTs. Our findings will contribute to a better understanding of the pathogenic mechanism of the PALB2 gene in CMTs. In humans, variant positions in canines have been linked to cancer-related phenotypes such as familial BC, endometrial tumor, and hereditary cancer predisposition syndrome. The results of bioinformatics analyses should be investigated through functional tests or case-control studies.Öğe Hepatic stellate cells increase in Toxoplasma gondii infection in mice(Bmc, 2013) Atmaca, Hasan Tarik; Gazyagci, Aycan Nuriye; Canpolat, Sila; Kul, OguzBackground: Toxoplasma gondii is a ubiquitous protozoan parasite that can infect humans and animals. The severity of toxoplasmosis varies according to the immune status of the individual, parasite strain, and host species. In mammalian species, it has been observed that severe lesions of acute toxoplasmosis form in visceral organs such as the liver, lung, and spleen. Some epidemiological studies have reported an association of T. gondii infection with liver cirrhosis. Methods: Acute infection was induced in fifteen 30-day-old normal Swiss albino mice. The mice were infected by intraperitoneal inoculation of 5000 T. gondii RH strain tachyzoites. The mice were sacrificed in groups of 5 at 2, 4, and 6 days after inoculation. Another group of 5 mice were used as the controls. Anti-glial fibrillary acidic protein (GFAP) and anti-T. gondii antibodies were used to compare GFAP-immunoreactive cells and anti-T. gondiiimmunopositive areas in the liver between the T. gondii-infected groups and the healthy controls, respectively. Results: There was a significant correlation between the numbers of GFAP-positive hepatic stellate cells (HSCs) when they were compared with T. gondii antigen immunostaining (p < 0.05). The amount of T. gondii immunostaining increased significantly with the increase in the number of HSCs. Conclusions: There is a significant relationship between the number of HSCs and T. gondii antigens, which may represent an active role of HSCs in liver pathology and the pathobiology of T. gondii-related hepatitis.Öğe Hepatogenous photosensitization in Akkaraman lambs: special emphasis to oxidative stress and thrombocytopenia(Ankara Univ Press, 2013) Ocal, Naci; Haydardedeoglu, Ali Evren; Cinar, Miyase; Kul, Oguz; Turk, MustafaIn this study, a total of 24 Akkaraman lambs with clinical signs that are reminiscent of photosensitization composed the experimental group (Group I). Additional 10 healthy lambs were included as controls (Group II). We were aimed to make definitive diagnosis of photosensitization, which can be confused with blue tongue, big head and sunburns and to establish etiology as primary or hepatogenous. In total blood analyses, the leukocyte count was higher, but thrombocyte count was lower (thrombocytopenia) in Group I compared to Group II. The lower MCV indicates presence of a case of microcytosis. Furthermore, affected lambs had significantly higher levels of phylloerythrin, gamma-glutamyl transpeptidase, aspartate aminotransferase, alkaline phosphatase, cholesterol and serum urea nitrogen. Histopathological lesions included periaciner necrosis, periportal fibrosis and biliary duct hyperplasy. The grazing field, where the lambs had been grazing, was very rich in Tribulus terrestris, a hepatotoxic plant. Based on the increased levels of phylloerythrin, gamma-glutamyl transpeptidase, aspartate aminotransferase and alkaline phosphatase as well as pathological findings in liver, the cases were diagnosed as hepatogenous photosensitization. In addition, presence of Tribulus terrestris in the grazing pasture strongly supported the diagnosis. Increased levels of serum malondialdehyde in affected lambs showed an ongoing oxidative stress. In addition, thrombocytopenia in such cases should be considered as a risk factor for disseminated intravascular coagulation (DIC). Thus in addition to a semptomatical treatment protocol, use of antioxidants, anticoagulants, and liver protective agents shoud be taken into consideration in hepatogenous photosensitization in lambs.Öğe Immunohistochemical investigation of the damage to and repair of myelin, and astrocyte activity in small ruminants resulting from with natural meningoencephalitic listeriosis(Ankara Univ Press, 2018) Ozyildiz, Zafer; Dincel, Gungor Cagdas; Terzi, Osman Safa; Ozsoy, Sule Yurdagul; Kul, OguzMeningoencephalitic listeriosis is a significant bacterial disease in various species. Common characteristics include microabscesses in the brainstem, midbrain and cerebellum. Many aspects of damage to the central nervous system caused by the disease remain obscure. We investigated central nervous system damage by assessing the presence of biomarkers such as galactocerebroside (GAL-C), glial fibrilary acidic protein (GFAP) and myelin basic protein (MBP) in brain tissues of sheep and goats of various ages, which naturally infected with listeriosis. We examined sections of pons, medulla oblongata, rostral colliculus, cerebellum, thalamus and cornu ammonis and found increased MBP (P < 0.01), GAL-C (P < 0.01) and GFAP (P < 0.01) expression. Ihis studv showed that myelin damage in meningoencephalitic listeriosis was an important neuropathological finding. The most prominent finding of this study is the beginning of the regeneration as soon as myelin damage occurs.Öğe Increased Expressions of ADAMTS-13, Neuronal Nitric Oxide Synthase, and Neurofilament Correlate with Severity of Neuropathology in Border Disease Virus-Infected Small Ruminants(Public Library Science, 2015) Dincel, Gungor Cagdas; Kul, OguzBorder Disease (BD), caused by Pestivirus from the family Flaviviridae, leads to serious reproductive losses and brain anomalies such as hydranencephaly and cerebellar hypoplasia in aborted fetuses and neonatal lambs. In this report it is aimed to investigate the expression of neuronal nitric oxide synthase (nNOS), A Disintegrin And Metalloprotease with Thrombospondin type I repeats-13 (ADAMTS-13), and neurofilament (NF) in the brain tissue in small ruminants infected with Border Disease Virus (BDV) and to identify any correlation between hypomyelinogenesis and BD neuropathology. Results of the study revealed that the levels of ADAMTS-13 (p<0.05), nNOS (p<0.05), and NF (p<0.05) were remarkably higher in BDV-infected brain tissue than in the uninfected control. It was suggested that L-arginine-NO synthase pathway is activated after infection by BDV and that the expression of NF and nNOS is associated with the severity of BD. A few studies have focused on ADAMTS-13 expression in the central nervous system, and its function continues to remain unclear. The most prominent finding from our study was that ADAMTS-13, which contain two CUB domains, has two CUB domains and its high expression levels are probably associated with the development of the central nervous system (CNS). The results also clearly indicate that the interaction of ADAMTS-13 and NO may play an important role in the regulation and protection of the CNS microenvironment in neurodegenerative diseases. In addition, NF expression might indicate the progress of the disease. To the best of the authors' knowledge, this is the first report on ADAMTS-13 expression in the CNS of BDV-infected small ruminants.Öğe Investigation of the diagnostic value of serology, cytology and polymerase chain reaction in cat toxoplasmosis(Ankara Univ Press, 2017) Yasa Duru, Sibel; Kul, Oguz; Babur, Cahit; Deniz, Ahmet; Pekcan, Zeynep; Pir Yagci, IlknurToxoplasmosis is an infectious disease affecting most of the mammalian and aviary animals caused by Toxoplasma gondii. In this study, diagnostic values of bronchoalveolar lavage, biopsy and PCR and their practical implementation ways were questioned. The results of the each test were evaluated. Additionally, incidence of toxoplasmosis among seropositive cats were investigated by T. gondii and oocyst shedding screened in the stool samples, as well. The material of the study was constituted by blood, stool and bronchoalveoloar lavage samples taken from totally 102 cats. Bronchoalveolar lavage samples were evaluated for cytologic examination. In PCR analysis, T. gondii B1 primary sets were used and conventional-PCR procedure was applied. Antibodies to T. gondii were found in 49 (48,03%) of 102, with titers of 1/16 in 41 (40,19%), 1/64 in 8 (7,84%) cats. Only one cat exhibited systemic toxoplasmosis. In conclusion, although the seroprevalance was 48.03%, systemic toxoplasmosis rate was found 0.98% (1/49) with a lower percentage.Öğe Meningoencephalitis caused by pathogenic Sarcocystis species in a naturally infected sheep in Turkey(Georg Thieme Verlag Kg, 2017) Alasonyalilar-Demirer, Aylin; Kahraman, M. Mufit; Akkoc, Ahmet; Erturkuner, S. Pelin; Guzel, E. Elif; Kul, Oguz; Ipek, VolkanA 3-year-old sheep was examined after an acute onset of hind limb paralysis and ataxia. At necropsy, central nervous system, pulmonary and intestinal hyperaemia and ecchymoses in the aortic arch were observed. Main microscopic lesions were confined to the heart, cerebrum and cerebellum. There were a multifocal mild myocarditis and non-suppurative meningoencephalitis together with protozoal cysts in the heart and the brain. Protozoal cystic structures were observed within many of the myocardial fibers as well as in the cerebrum and cerebellum. Using light microscopy it could not be morphologically determined whether these organisms were Toxoplasma (T.) gondii or Neospora (N.) caninum. Additional diagnostic methods like immunohistochemistry and polymerase chain reaction provided differentiation of Sarcocystis from T. gondii and N. caninum. Transmission electron microscopy demonstrated characteristic features of Sarcocystis sp. as previously described. This is the first confirmed diagnosis of Sarcocystis sp. in the central nervous system of a sheep from Turkey.Öğe A new approach to Neospora caninum infection epidemiology: neosporosis in integrated and rural dairy farms in Turkey(Scientific Technical Research Council Turkey-Tubitak, 2014) Ocal, Naci; Atmaca, Hasan Tarik; Albay, Metin Koray; Deniz, Ahmet; Kalender, Hakan; Yildiz, Kader; Kul, OguzBoth cattle and dogs were examined in modern and rural dairy farms that had a history of abortion over 5%. The blood samples were collected from 427 aborted cattle and the sera were tested using a commercial ELISA test kit. Additionally, a necropsy procedure was carried out on the fetuses and calves dead within 2 months after birth; the tissue samples were evaluated by histopathologic, immunoperoxidase, and PCR techniques. Eighteen dogs in close contact with the cattle in the same field were included in the study and blood and feces samples were collected. The feces samples were analyzed by copro-PCR and the sera were tested by indirect fluorescent antibody test. As a result, 161 out of 427 sera samples (37.7%) were found positive for N. caninum. In cattle, the lowest seropositivity was 6.7% and the highest seropositivity was 74.24%. Neosporosis seroprevalence in integrated holdings was lower than those of rural dairy cattle facilities (66.7%). The seropositivity for N. caninum in dogs was determined as 72.7% in rural holdings and 28.6% in integrated holdings. According to the risk analysis, N. caninum-seropositive cows had greater exposure to N. caninum-seropositive dogs in rural family holdings and integrated holdings (P = 0.054, odds ratio = 0.929; and P= 0.008, odds ratio = 0.986, respectively).
