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Yildirim F, Kesen AO, Varalan A. The comparative effect of creep and conventional feeding methods on growth performance and oxidative stress markers in Akkaraman lambs. Trop Anim Health Prod 2023; 55:382. [PMID: 37889373 DOI: 10.1007/s11250-023-03804-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Accepted: 10/17/2023] [Indexed: 10/28/2023]
Abstract
This study aimed to determine the effect of conventional and creep-feeding methods on growth performance and oxidative stress in Akkaraman (AKK) lambs. For this purpose, the AKK lambs (n = 60) used in this study were divided into four groups (15 n × 2 sex × 2 feeding methods), and all of them were fed the same ration. In the conventional feeding method, the lambs were taken to their dams for suckling twice a day and then kept in a separate compartment for further feeding. In contrast, in the creep-feeding method, the lambs always stayed with their mothers and had free access to supplementary feed by passing through the creep-feeding area. The data for body weights, body measurements, and saliva samples were collected five times, 14 days apart, to evaluate lambs' growth performance and oxidative stress markers. The results showed a higher (P < 0.05) body weight gain in the creep-fed group than in the conventional-fed group. The difference between creep and conventional feeding was significant (P = 0.033), but the difference between the groups in terms of gender was nonsignificant (P = 0.438). The males fed with the creep-feeding (CR-M) group had the largest body length (BL), pectoral chest width (PCW), chest depth (CD), chest circumference (CC), head length (HL), and head width (HW) measurements. The males fed with the conventional feeding (CO-M) group had the largest wither height (WH) measurement, and females fed with the conventional feeding (CO-F) group had the largest back length (BAL) body size. When the overall improvement in body measurements was considered, it was determined that the body sizes of many males in creep-feeding increased more than those of other feeding groups. The oxidative stress marker malondialdehyde (MDA) was higher (P < 0.001) in the conventional feeding group. Other oxidative stress markers, superoxide dismutase (SOD), catalase (CAT), and glutathione s-transferase (GSH-ST), were higher in the creep-feeding group (P < 0.001). Considering these findings, it is possible to conclude that creep-feeding is superior to conventional feeding to get a higher growth rate and reduce oxidative stress in AKK lambs.
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Affiliation(s)
- F Yildirim
- Department of Animal Science, Faculty of Veterinary Medicine, University of Atatürk, Yakutiye, Erzurum, Turkey.
| | - Ali Osman Kesen
- Department of Animal Science, Faculty of Veterinary Medicine, University of Atatürk, Yakutiye, Erzurum, Turkey
| | - Alperen Varalan
- Department of Animal Health Economics and Management, Faculty of Veterinary Medicine, University of Atatürk, Yakutiye, Erzurum, Turkey
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Günay Uçmak Z, Koenhemsi L, Ateş F, Tarhan D, Öztürk Gürgen H, Yildirim F, Uçmak M, Kirşan İ, Ercan AM, Or ME. Amounts of tissue magnesium and some trace elements in cats with mammary tumors related to various clinicopathological parameters. J Trace Elem Med Biol 2023; 79:127246. [PMID: 37393772 DOI: 10.1016/j.jtemb.2023.127246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/30/2023] [Revised: 06/14/2023] [Accepted: 06/19/2023] [Indexed: 07/04/2023]
Abstract
BACKGROUND Mammary tumors are one of the major malignancies seen in cats. Researchers have indicated the similarity between the epidemiological and clinicopathological patterns of feline mammary tumors and human breast cancer (HBC). In recent years, the investigation of trace elements in cancer tissues becomes prevalent in HBC due to the role of these elements in biochemical and physiological processes. This study, it is aimed to evaluate some trace elements in feline mammary tumors according to clinical and pathological findings. METHODS A total of 60 tumoral masses from 16 female cats with mammary tumors were included in the study. The study groups were formed according to histopathology as malignant epithelial tumor (MET; n = 39) and hyperplasia and dysplasia (H&D; n = 21). Copper (Cu), Iron (Fe), Magnesium (Mg), Manganese (Mn), Selenium (Se) and Zinc (Zn) trace elements in mammary tissues were analyzed by using an inductively coupled plasma-optical emission spectrophotometer. RESULTS The mean age and weight of the cats were 11.75 ± 0.75 years and 3.35 ± 0.21 kg; respectively. Eleven of 16 cats were intact whereas the rest of them had been spayed. Metastases were observed in 10 cats. Tissue Mg level in group MET was significantly higher than in group H&D (P < 0.01) while the other elements had not significant differences between the groups. In group MET, analyzed elements were not statistically significant related to the inflammation, ulceration and invasion to the peripheral muscle (P > 0.05). However, tissue Fe level was significantly higher in T2 than in T3 (P < 0.05). The mean levels of tissue Fe, Mg and Mn had significant differences related to histological grading as P < 0.01, P < 0.05 and P < 0.001; respectively. A mild to severe correlation was found between tissue Zn and Se, Cu, Fe, Mg, and Mn levels. CONCLUSION Tissue Mg and some trace elements were evaluated in feline mammary tumours in regard to various clinicopathological parameters. Tissue Mg level was sufficient to differentiate the malignant epithelial tumors from hyperplasia and dysplasia. However, Mn and Se tended to distinguish different tumor types. Tissue Fe, Mg and Mn had significant differences related to histological grading. Also, the Fe level was significantly higher in T2 than in T3 and Zn level tended to be higher in T3 than in T1. It was concluded that Mg, Se, Mn, Fe, Cu and Zn provided useful information on the pathogenesis of feline mammary tumors. Further research is needed on the tissue and serum concentrations of trace elements which may provide valuable information for the disease prognosis.
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Affiliation(s)
- Zeynep Günay Uçmak
- Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Türkiye.
| | - Lora Koenhemsi
- Department of Internal Medicine, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Türkiye
| | - Fatma Ateş
- Department of Biophysics, Faculty of Medicine, Beykent University, Büyükçekmece, Istanbul, Türkiye
| | - Duygu Tarhan
- Department of Biophysics, Cerrahpaşa Faculty of Medicine, Istanbul University-Cerrahpaşa, Fatih, Istanbul, Türkiye; Department of Biophysics, School of Medicine, Bahcesehir University, Istanbul, Türkiye
| | - Hazal Öztürk Gürgen
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Büyükçemece, Istanbul, Türkiye
| | - Funda Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Büyükçemece, Istanbul, Türkiye
| | - Melih Uçmak
- Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Türkiye
| | - İsmail Kirşan
- Department of Obstetrics and Gynaecology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Türkiye
| | - Alev Meltem Ercan
- Department of Biophysics, Cerrahpaşa Faculty of Medicine, Istanbul University-Cerrahpaşa, Fatih, Istanbul, Türkiye
| | - Mehmet Erman Or
- Department of Internal Medicine, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Avcılar, Istanbul, Türkiye
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Bozkurt M, Polat EC, Ozcan L, Ozer M, Ozturk GY, Yildirim F, Otunctemur A. Effect of Nintedanib on healing and fibrosis in rats with experimentally induced urethral injury. Prog Urol 2023:S1166-7087(23)00065-9. [PMID: 36959024 DOI: 10.1016/j.purol.2023.02.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2022] [Revised: 02/21/2023] [Accepted: 02/25/2023] [Indexed: 03/25/2023]
Abstract
AIM We aimed to determine the effectiveness of Nintedanib treatment, which has known antifibrotic effect, in preventing fibrosis after urethral trauma. MATERIAL AND METHODS Twenty-three adult Sprague-Dawley rats were divided randomly into 3 different groups: Sham, Urethral injury group (UI) and Urethral injury+ Nintedanib (UI+N). The urethral injury model was made with a pediatric urethrotome knife. Nintedanib was administered at a dose of 50mg/kg by oral gavage for 14 days at the same time every day. After 14 days of treatment, all rats were performed penectomy under general anesthesia. Urethral tissue was evaluated histopathologically (congestion, inflammatory cell infiltration and spongiofibrosis) and immunohistochemically (transforming growth factor (TBF) Beta-1 and vascular endothelial growth factor receptor 2 (VEBFR2)). RESULTS Histopathological findings: Group UI had higher scores in all categories (congestion, inflammatory cell infiltration, and spongiofibrosis), followed by Group UI+N and Group Sham, respectively. A statistically significant difference was found between Group UI and Group UI+N in terms of the scores of histopathological parameters (p<0.05). Immunohistochemical findings: Group UI had higher scores in both categories, followed by Group UI+N and Group Sham, respectively. A statistically significant difference was found between Group UI and Group UI+N in TGF Beta-1 and VEGF scores (p<0.05). CONCLUSION We found that Nintedanib administration after urethral trauma reduced inflammation and fibrosis histologically and immunohistochemically. The positive effect of Nintedanib on inflammation and fibrosis after urethral trauma reported in this animal study is encouraging for a potential clinical human application.
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Affiliation(s)
- M Bozkurt
- Department of Urology, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey.
| | - E C Polat
- Department of Urology, University of Health Sciences, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - L Ozcan
- Department of Urology, University of Health Sciences, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - M Ozer
- Department of Urology, University of Health Sciences, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - G Y Ozturk
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - F Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - A Otunctemur
- Department of Urology, University of Health Sciences, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
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Turna O, Deveci Ozkan A, Guney Eskiler G, Baykal A, Ozten O, Yildirim F, Armutak EI, Kamanli AF, Lim HS, Kaleli S, Kasikci G, Yildiz SZ. Comparison of the anti-cancer activity of 5-aminolevulinic acid-mediated photodynamic therapy after continuous wave and pulse irradiation in different histological types of canine mammary sarcoma tumors. Lasers Med Sci 2023; 38:70. [PMID: 36780027 DOI: 10.1007/s10103-023-03732-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2022] [Accepted: 02/05/2023] [Indexed: 02/14/2023]
Abstract
Canine mammary sarcoma tumors (CMST) are the most aggressive tumors with poor prognosis in dogs. Due to inadequate treatment options for CMST, recent studies have focused on alternative treatment strategies. We previously determined the optimized protocol of 5-ALA-based photodynamic therapy (PDT) in canine liposarcoma. However, its molecular mechanisms in the treatment of different histological types of CMST remain unclear.In this context, we, for the first time, assessed 5-aminolevulinic acid (5-ALA)-PDT-mediated anti-cancer activity and its molecular mechanism after continuous wave (CW) and pulse radiation (PR) on three different histological types (liposarcoma, chondrosarcoma, and osteosarcoma) of CMST cells by WST-1, Annexin V, ROS, acridine orange/propidium iodide staining, RT-PCR, and western blot analysis.Our findings showed that 5-ALA/PDT significantly suppressed the proliferation of CMST cells (p < 0.01) and induced apoptosis via increased ROS level and overexpression of Caspase-9 and Caspase-3 mRNA and cleaved protein levels in especially liposarcoma and chondrosarcoma cells following CW and PR irradiation at 9 J/cm2. However, the response of CMST cells to 5-ALA was different upon CW and PR irradiation due to differences in their origin.Collectively, our findings provided the first evidence that 5-ALA-based PDT could be used as an alternative treatment strategy, especially liposarcoma and chondrosarcoma. However, further in vitro and in vivo studies are required to elucidate the underlying molecular mechanism of the efficacy of 5-ALA in CMST cells at the molecular level.
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Affiliation(s)
- Ozge Turna
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Asuman Deveci Ozkan
- Department of Medical Biology, Faculty of Medicine, Sakarya University, Sakarya, Turkey
| | - Gamze Guney Eskiler
- Department of Medical Biology, Faculty of Medicine, Sakarya University, Sakarya, Turkey.
| | - Aslihan Baykal
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ozge Ozten
- Department of Biomedical Engineering, Institute of Natural Sciences, Sakarya University of Applied Science, Sakarya, Turkey
| | - Funda Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Elif Ilkay Armutak
- Department of Histology and Embryology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Ali Furkan Kamanli
- Department of Electric and Electronics Engineering, Faculty of Technology, Sakarya University of Applied Sciences, Sakarya, Turkey
| | - Hyun Soo Lim
- Department of Electric and Electronics Engineering, Faculty of Technology, Sakarya University of Applied Sciences, Sakarya, Turkey
| | - Suleyman Kaleli
- Department of Medical Biology, Faculty of Medicine, Sakarya University, Sakarya, Turkey
| | - Guven Kasikci
- Department of Obstetrics and Gynecology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Salih Zeki Yildiz
- Department of Chemistry, Faculty of Science, Sakarya University, Sakarya, Turkey
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Ipek E, Epikmen ET, Yildirim F, Ozsoy SY, Tunca R. Immunolabelling of SCF and c-KIT in canine perianal gland tumours. J Comp Pathol 2023; 200:51-58. [PMID: 36652776 DOI: 10.1016/j.jcpa.2022.11.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2022] [Revised: 09/02/2022] [Accepted: 10/29/2022] [Indexed: 01/18/2023]
Abstract
c-KIT and its ligand stem cell factor (SCF) play a direct role in the oncogenesis of various cancers by regulating the cell fate. Recent evidence indicates that an increased expression of c-KIT/SCF, driven by hormonal imbalances, is an important step in the development of hormone-dependent cancers. We investigated the possible role of the c-KIT/SCF system in the carcinogenesis in 44 perianal gland tumours (16 adenomas, 15 epitheliomas and 13 carcinomas) and 10 normal perianal gland tissues by assessing the percentage and type of cells that expressed c-KIT and SCF as well as the cellular localization of immunoreactivity. No differences in immunolabelling of SCF were found between normal glands and neoplastic cells of any histotype. The highest expression of c-KIT was seen in carcinomas and a positive correlation was found between c-KIT labelling score and mitotic index (R = 0.876; P <0.01). c-KIT labelling patterns in hepatoid cells varied among the tumour histotypes with adenomas having only membranous labelling. Three labelling patterns (membranous only, membranous and cytosolic, and cytosolic only) were seen in the other tumour histotypes. Cytosolic labelling was statistically more frequent in carcinomas than in adenomas (P <0.001). These findings suggest that c-KIT expression and its cellular localization may play a role in the development and progression of perianal gland tumours by influencing cell proliferation.
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Affiliation(s)
- Emrah Ipek
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey.
| | - Erkmen T Epikmen
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
| | - Funda Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Sule Y Ozsoy
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
| | - Recai Tunca
- Department of Pathology, Faculty of Veterinary Medicine, Adnan Menderes University, Aydın, Turkey
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Alp Onen E, Sonmez K, Yildirim F, Demirci EK, Gurel A. Development, analysis, and preclinical evaluation of inactivated vaccine candidate for prevention of Covid-19 disease. All Life 2022. [DOI: 10.1080/26895293.2022.2099468] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022] Open
Affiliation(s)
- Engin Alp Onen
- Kocak Pharmaceuticals, Vaccine and Biotechnology R&D, Organize Sanayi Bölgesi, Kapakli/Tekirdag, Turkey
| | - Kivilcim Sonmez
- Faculty of Veterinary Medicine, Pathology Department, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Funda Yildirim
- Faculty of Veterinary Medicine, Pathology Department, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | | | - Aydin Gurel
- Faculty of Veterinary Medicine, Pathology Department, Istanbul University-Cerrahpasa, Istanbul, Turkey
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Erkat OB, Erisen D, Yilmaz C, Yildirim F, Boyaci H. Estimating receptive field profiles of specific visual fields. J Vis 2022. [DOI: 10.1167/jov.22.14.3666] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Affiliation(s)
- O. Batuhan Erkat
- Behavioral and Neural Sciences Graduate Program, Rutgers University, NJ, USA
- Center for Molecular and Behavioral Neuroscience, Rutgers University, NJ, USA
| | - Dilara Erisen
- Neuroscience Graduate Program, Bilkent University, Ankara, Turkey
- Aysel Sabuncu Brain Research Center, Bilkent University, Ankara, Turkey
| | - Cemre Yilmaz
- Institute of Psychology, University of Graz, Graz, Austria
| | | | - Huseyin Boyaci
- Neuroscience Graduate Program, Bilkent University, Ankara, Turkey
- Aysel Sabuncu Brain Research Center, Bilkent University, Ankara, Turkey
- Department of Psychology, Bilkent University, Ankara, Turkey
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Özbayrak I, Ozturk T, Amanvermez Senarslan D, Yildirim F. CAUSES OF EXCESSIVE BLEEDING IN PATIENTS UNDERGONE OPEN HEART SURGERY DURING EARLY POSTOPERATIVE PERIOD; OUR EXPERİENCES FOR TWO YEARS. J Cardiothorac Vasc Anesth 2022. [DOI: 10.1053/j.jvca.2022.09.054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/05/2022]
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9
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Özgür DS, Akkuzu G, Yildirim F, Yalçin Mutlu M, Karaali Oğlu B, Erdoğan M, Bes C. Coexistence of relapsing polychondritis and eosinophilic granulomatous with polyangiitis: A rare entity. Clin Ter 2022; 173:500-502. [PMID: 36373442 DOI: 10.7417/ct.2022.2469] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
Relapsing polychondritis (RP) is a a rare multisystemic disease and it affects cartilaginous tissue and proteoglycan rich organs. The spectrum of clinical features are intermittent inflammation involving especially the auricular and nasal regions. In some patients with RP, systemic vasculitis, autoimmune diseases or malignancy may accompany. Although rare, any of the ANCA-associated vasculitis have been reported in patients with RP. Eosinophilic granulomatous with polyangiitis (EGPA) is a multisystem small vessel vasculitis associated with asthma and eosinophilia. Here we present a case of coexistence of RP and EGPA.
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Affiliation(s)
- D S Özgür
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
| | - G Akkuzu
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
| | - F Yildirim
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
| | - M Yalçin Mutlu
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
| | - B Karaali Oğlu
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
| | - M Erdoğan
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
| | - C Bes
- University of Health Sciences, Başakşehir Çam and Sakura City Hospital, Department of Rheumatology, Istanbul, Turkey
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Yildirim F, Erdogan M, Mutlu MY, Icacan OC, Onar MI, Bes C. Efficacy of anticytokine treatments added to corticosteroids in patients with COVID-19-associated pneumonia and hyperinflammation: a single center experience. Eur Rev Med Pharmacol Sci 2022; 26:7297-7304. [PMID: 36263542 DOI: 10.26355/eurrev_202210_29924] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
OBJECTIVE Pneumonia and hyperinflammatory state related to COVID-19 infection are fatal clinical conditions without definite treatment modalities. Interleukin-6 and Interleukin-1 targeted therapies have been proposed as treatment options. This study was conducted to investigate the efficacy of anakinra and tocilizumab added to corticosteroids in patients with COVID-19-associated pneumonia and hyper-inflammatory syndrome in our tertiary clinical center. PATIENTS AND METHODS Patients with COVID-19-associated pneumonia and hyperinflammatory state who did not respond to initial treatments, including corticosteroids, were included in the study. The patients' electronic records were reviewed retrospectively and recorded according to a standardized data table. Univariate and multivariate regression analyses were used to identify risk factors associated with intubation. RESULTS 388 patients were included in the study. 197 patients were intubated and most of them died (n=194/197, 98%). 67 patients received tocilizumab, and 97 patients received anakinra. Anakinra [OR: 0.440, 95% CI=0.244-0.794, p=0.006] and tocilizumab [OR: 0.491, 95% CI=0.256-0.943, p=0.033] were both associated with a decreased risk for intubation. However, having a neutrophil/lymphocyte ratio ≥ 10 [OR: 2.035, 95% CI=1.143-3.623, p=0.016], serum lactate dehydrogenase (LDH) level ≥ 400 [OR: 3.160, 95% CI=1.937-5.156, p<0.001] and age ≥ 50 [OR: 4.048, 95% CI=2.037-8.043, p < 0.001] was associated with an increased risk for intubation. CONCLUSIONS Both anakinra and tocilizumab, added to initial standard COVID-19 treatments (including glucocorticoids) reduced the need for intubation in patients with COVID-19-associated severe pneumonia and hyperinflammatory syndrome. Given the high mortality rate of intubated patients with COVID-19, both treatments may have added benefits on mortality.
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Affiliation(s)
- F Yildirim
- Department of Rheumatology, University of Health Sciences, Basaksehir Cam and Sakura City Hospital, Istanbul.
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11
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Yorgancigil E, Yildirim F, Urgen BA, Erdogan SB. An Exploratory Analysis of the Neural Correlates of Human-Robot Interactions With Functional Near Infrared Spectroscopy. Front Hum Neurosci 2022; 16:883905. [PMID: 35923750 PMCID: PMC9339604 DOI: 10.3389/fnhum.2022.883905] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2022] [Accepted: 06/22/2022] [Indexed: 11/13/2022] Open
Abstract
Functional near infrared spectroscopy (fNIRS) has been gaining increasing interest as a practical mobile functional brain imaging technology for understanding the neural correlates of social cognition and emotional processing in the human prefrontal cortex (PFC). Considering the cognitive complexity of human-robot interactions, the aim of this study was to explore the neural correlates of emotional processing of congruent and incongruent pairs of human and robot audio-visual stimuli in the human PFC with fNIRS methodology. Hemodynamic responses from the PFC region of 29 subjects were recorded with fNIRS during an experimental paradigm which consisted of auditory and visual presentation of human and robot stimuli. Distinct neural responses to human and robot stimuli were detected at the dorsolateral prefrontal cortex (DLPFC) and orbitofrontal cortex (OFC) regions. Presentation of robot voice elicited significantly less hemodynamic response than presentation of human voice in a left OFC channel. Meanwhile, processing of human faces elicited significantly higher hemodynamic activity when compared to processing of robot faces in two left DLPFC channels and a left OFC channel. Significant correlation between the hemodynamic and behavioral responses for the face-voice mismatch effect was found in the left OFC. Our results highlight the potential of fNIRS for unraveling the neural processing of human and robot audio-visual stimuli, which might enable optimization of social robot designs and contribute to elucidation of the neural processing of human and robot stimuli in the PFC in naturalistic conditions.
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Affiliation(s)
- Emre Yorgancigil
- Department of Medical Engineering, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
- *Correspondence: Emre Yorgancigil
| | - Funda Yildirim
- Cognitive Science Master's Program, Yeditepe University, Istanbul, Turkey
- Department of Computer Engineering, Yeditepe University, Istanbul, Turkey
| | - Burcu A. Urgen
- Department of Psychology, Bilkent University, Ankara, Turkey
- Neuroscience Graduate Program, Bilkent University, Ankara, Turkey
- Aysel Sabuncu Brain Research Center, National Magnetic Resonance Research Center (UMRAM), Ankara, Turkey
| | - Sinem Burcu Erdogan
- Department of Medical Engineering, Acibadem Mehmet Ali Aydinlar University, Istanbul, Turkey
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Can O, Canat L, Eraldemir FC, Acar E, Yildirim F, Sonmez K, Otunctemur A, Altunrende F. Protective effect of oltipraz in testicular ischaemia/reperfusion injury: An experimental study. Andrologia 2022; 54:e14245. [PMID: 34514606 DOI: 10.1111/and.14245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2021] [Revised: 07/08/2021] [Accepted: 09/01/2021] [Indexed: 01/05/2023] Open
Abstract
Testicular torsion is an emergency urological disease, and the treatment is immediate surgery. Despite emergency surgery, testicular damage may occur due to reperfusion. Therefore, a medical treatment to prevent this damage may be a rational idea. We aimed to evaluate the protective effect of oltipraz in testicular ischaemia/reperfusion damage. Twenty-eight Wistar-Albino rats were randomly divided into four groups. In ischaemia/reperfusion group, testicular torsion was executed, and orchiectomy was done 4 hr after detorsion with no treatment. Second group performed torsion; intraperitoneal 50 mg/kg oltipraz was applied 30 min before detorsion, and orchiectomy was performed 4 hr after detorsion. Third group applied torsion; intraperitoneal 150 mg/kg oltipraz was applied 30 min before detorsion, and orchiectomy was performed 4 hr after detorsion. Last one was the sham group. We evaluated tissue malondialdehyde (MDA), transforming growth factor-β1 (TGF-β1), superoxide dismutase (SOD), reduced glutathione (GSH) and Johnsen testicular biopsy score. There was a significant decrease in TGF-β1, GSH and MDA values in oltipraz treatment groups compared with ischaemia/reperfusion group. Oltipraz treatment has significant protective effect in testicular ischaemia/reperfusion damage. However, more clinical studies are needed to demonstrate appropriate dose and its effects.
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Affiliation(s)
- Osman Can
- Department of Urology, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey
| | - Lutfi Canat
- Department of Urology, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - Fatma Ceyla Eraldemir
- Department of Biochemistry, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Esra Acar
- Department of Biochemistry, Faculty of Medicine, Kocaeli University, Kocaeli, Turkey
| | - Funda Yildirim
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University, Istanbul, Turkey
| | - Kivilcim Sonmez
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University, Istanbul, Turkey
| | - Alper Otunctemur
- Department of Urology, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
| | - Fatih Altunrende
- Department of Urology, Prof. Dr. Cemil Tascioglu City Hospital, Istanbul, Turkey
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Yildirim F, Amanvermez Senarslan D, Yersel S, Bayram B, Taneli F, Tetik O. Systemic inflammatory response during cardiopulmonary bypass: Axial flow versus radial flow oxygenators. Int J Artif Organs 2022; 45:278-283. [PMID: 35098782 DOI: 10.1177/03913988221075043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
BACKGROUND The objective of this study was to investigate the inflammatory effects of different oxygenator flow pattern types in patients undergoing coronary artery bypass graft surgery with cardiopulmonary bypass. METHODS We designed this randomized, single-blind, prospective study of patients with coronary artery disease. We compared the systemic inflammatory effects of oxygenators with two types of flow: axial flow and radial flow. Therefore, we divided the patients into two groups: 24 patients in the axial group and 28 patients in the radial group. IL-1, IL-6, IL-10, and TNF-α were examined for cytokine activation leading to a systemic inflammatory reaction. The samples were collected at three different time intervals: T1, T2, and T3 (T1 was taken before cardiopulmonary bypass, T2 just 1 h after CPB onset, and T3 was taken 24 h after the surgery). RESULTS There were no significant differences in demographic characteristics between the two groups. We observed that there were notably lower levels of humoral inflammatory response parameters (IL-1, IL-6, and TNF-α) in the radial flow oxygenator group than in the axial flow group at the specific sampling times. For IL-10, there was no significant difference for any time period. CONCLUSION It might be advantageous to use a radial-flow-patterned oxygenator to limit the inflammatory response triggered by the oxygenators in cardiopulmonary bypass.
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Affiliation(s)
- Funda Yildirim
- Cardiovascular Surgery, Manisa Celal Bayar University, Manisa, Turkey
| | | | - Seyhmus Yersel
- Manisa Celal Bayar University, Manisa, Turkey.,Munich Heart Center, Munich, Germany
| | - Barıs Bayram
- Cardiovascular Surgery, Manisa Celal Bayar University, Manisa, Turkey
| | - Fatma Taneli
- Biochemistry, Manisa Celal Bayar University, Manisa, Turkey
| | - Omer Tetik
- Cardiovascular Surgery, Manisa Celal Bayar University, Manisa, Turkey
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Amanvermez Senarslan D, Yildirim F, Kurdal AT, Damar A, Ozturk T, Tetik O. Efficacy and cost-effectiveness of cell saver usage in the repair of thoracic aortic aneurysms and dissections. Perfusion 2021; 37:722-728. [PMID: 34192996 DOI: 10.1177/02676591211028178] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
INTRODUCTION A substantial amount of blood loss occurs during the open repair of aortic aneurysms or dissections. The aim of the present study is to determine the efficacy and cost-effectiveness of cell saver devices in blood conservation during the open repair of thoracic aortic pathologies. METHODS The present study prospectively collected the data pertaining to 25 patients who underwent surgical management of thoracic aortic aneurysms or dissections using a cell saver (Group 1, n = 25). The volume and cost of transfusion and postoperative outcomes were compared with the second group of patients who underwent surgery without the use of cell savers in the previous year (Group 2, n = 25); the data pertaining to the same were retrospectively collected from the hospital records. The patient characteristics and categorical variables were compared using the x2 test and Fisher's exact test. Transfusion volume and costs were compared using the independent samples t-test and Mann-Whitney U test. RESULTS The patients in both the groups displayed similar characteristics and risk factors. The total volume of allogenic red blood cell (p < 0.001) and total blood product (p = 0.01) transfusions were significantly lower in Group 1. The cost of red blood cell (p < 0.001) and total transfusions (p = 0.03) were lower in Group 1. The two groups displayed similar in-hospital morbidity and mortality rates. CONCLUSIONS There was a significant association between the use of cell savers and the decreased need for red blood cell and total blood product transfusions. Considering the cost of the cell saver set, transfusion costs in the two groups were comparable.
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Affiliation(s)
| | - Funda Yildirim
- Department of Cardiovascular Surgery, Manisa Celal Bayar University, Faculty of Medicine, Manisa, Turkey
| | - Adnan Taner Kurdal
- Department of Cardiovascular Surgery, Manisa Celal Bayar University, Faculty of Medicine, Manisa, Turkey
| | - Abdulkerim Damar
- Department of Cardiovascular Surgery, Manisa Celal Bayar University, Faculty of Medicine, Manisa, Turkey
| | - Tulun Ozturk
- Department of Anesthesiology and Reanimation, Manisa Celal Bayar University, Faculty of Medicine, Manisa, Turkey
| | - Omer Tetik
- Department of Cardiovascular Surgery, Manisa Celal Bayar University, Faculty of Medicine, Manisa, Turkey
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Degirmentepe RB, Altunrende F, Bozkurt M, Merder E, Otunctemur A, Sonmez K, Yildirim F, Ada S, Isman FK, Cekmen MB. Protective effect of liraglutide on experimental testicular ischaemia reperfusion in rats. Andrologia 2021; 53:e14000. [PMID: 33550644 DOI: 10.1111/and.14000] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2020] [Revised: 12/16/2020] [Accepted: 01/18/2021] [Indexed: 11/29/2022] Open
Abstract
This study was performed to evaluate the effect of liraglutide on experimental testicular ischaemia reperfusion in rats in terms of biochemistry, histopathology and immunohistochemistry. A total of 28 male Wistar-Albino rats were divided randomly into 4 groups: control (7), sham (7), ischaemia-reperfusion (7) and ischaemia-reperfusion + liraglutide (7). Biochemically, Nitric Oxide, Malondialdehyde, Superoxide dismutase, Glutathione peroxidase and Catalase levels were measured in the testis. Apoptosis protease activating factor-1 and inducible nitric oxide synthase activity were evaluated immunohistochemically as well. Statistical analyses were made via the Kruskal-Wallis and Mann-Whitney U tests. In the reperfusion group, CAT and SOD values were increased (p > .05), NO and MDA values were decreased (p < .05) after administration of liraglutide. In addition, GPx values were significantly increased in ischaemia reperfusion + liraglutide administered group compared to reperfusion group (p < .05). Apaf-1 and iNOS activity were significantly decreased with the addition of liraglutide treatment to the ischaemia-reperfusion group (p < .05). First of all, we would like to say that liraglutide treatment is moderately preventive against I/R injury in testicular torsion. The anti-inflammatory, antioxidant and antiapoptotic properties of liraglutide are create a moderately protective effect as we show in this study.
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Affiliation(s)
| | - Fatih Altunrende
- Department of Urology, University of Health Sciences Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Muammer Bozkurt
- Department of Urology, Basaksehir Cam and Sakura City Hospital, Istanbul, Turkey
| | - Erkan Merder
- Department of Urology, University of Health Sciences Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Alper Otunctemur
- Department of Urology, University of Health Sciences Okmeydani Training and Research Hospital, Istanbul, Turkey
| | - Kivilcim Sonmez
- Faculty of Veterinary Medicine, Department of Pathology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Funda Yildirim
- Faculty of Veterinary Medicine, Department of Pathology, Istanbul University-Cerrahpasa, Istanbul, Turkey
| | - Saniye Ada
- Department of Medical Biochemistry, Istanbul Medeniyet University, Istanbul, Turkey
| | - Ferruh K Isman
- Department of Medical Biochemistry, Istanbul Medeniyet University, Istanbul, Turkey
| | - Mustafa B Cekmen
- Department of Medical Biochemistry, Istanbul Medeniyet University, Istanbul, Turkey
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Kabak YB, Sozmen M, Devrim AK, Sudagidan M, Yildirim F, Guvenc T, Yarim M, Gulbahar YM, Ahmed I, Karaca E, Inal S. Expression levels of angiogenic growth factors in feline squamous cell carcinoma. Acta Vet Hung 2020; 68:37-48. [PMID: 32384073 DOI: 10.1556/004.2020.00005] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2019] [Accepted: 11/13/2019] [Indexed: 01/16/2023]
Abstract
Squamous cell carcinoma (SCC) is the most common malignant neoplasm of the skin in cats. Tumour angiogenesis is the pivotal event for tumour progression and metastasis. We assessed protein and gene expression of angiogenic growth factors including bFGF, VEGF-C, TGF-β, PDGF-A, PDGF-C and PDGFR-α that possibly contribute to the angiogenic phenotype of feline SCC (FSCC) and could, therefore, be a good target in the treatment of SCC. In the present study, a total of 27 FSCC cases were investigated. Tumour cases were histopathologically classified as well differentiated (10/27), moderately differentiated (5/27), and poorly differentiated (12/27). The expression levels of the growth factors were detected using immunohistochemistry and assessed semi-quantitatively. Growth factor expression levels were evaluated at different locations: in the oral region, in areas exposed to solar UV radiation including the ears, eyelids and nasal planum, and other miscellaneous locations. Our findings have revealed that FSCC arising from different anatomical sites of the body and showing differences in aggressiveness, metastasis, and prognosis may be angiogenesis dependent, and angiogenic key regulators could play a role in the development of FSCC.
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Affiliation(s)
- Yonca B. Kabak
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
| | - Mahmut Sozmen
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
| | - Alparslan K. Devrim
- 2Department of Biochemistry, Faculty of Veterinary Medicine, Kırıkkale University, Kırıkkale, Turkey
| | - Mert Sudagidan
- 3Konya Food and Agriculture University, Kit-Argem, Konya, Turkey
| | - Funda Yildirim
- 4Department of Pathology, Faculty of Veterinary Medicine, Istanbul University-Cerrahpaşa, Istanbul, Turkey
| | - Tolga Guvenc
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
| | - Murat Yarim
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
| | - Yavuz M. Gulbahar
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
| | - Ishtiaq Ahmed
- 5Department of Pathology, University of Veterinary and Animal Sciences, Lahore, Pakistan
| | - Efe Karaca
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
| | - Sinem Inal
- 1Department of Pathology, Faculty of Veterinary Medicine, Ondokuz Mayıs University, Kurupelit, 55200 Atakum, Samsun, Turkey
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Bozkurt M, Degirmentepe RB, Polat EC, Yildirim F, Sonmez K, Cekmen M, Eraldemir C, Otunctemur A. Protective effect of hydrogen sulfide on experimental testicular ischemia reperfusion in rats. J Pediatr Urol 2020; 16:40.e1-40.e8. [PMID: 31786227 DOI: 10.1016/j.jpurol.2019.10.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Accepted: 10/05/2019] [Indexed: 01/12/2023]
Abstract
AIM Testicular torsion is an urgent urological condition. Ischemia-reperfusion (I/R) processes that occur after detorsion as a treatment for torsion are caused by testicular injury. The purpose of our study is investigating the protecting effect of hydrogen sulfide (H2S) on the testicular ischemia reperfusion injury. MATERIALS AND METHODS Thirty-eight Wistar-Albino rats were divided randomly into 6 different groups: Control (6); sham (6); IR-E (6)-2 h of torsion and 4 h of reperfusion; IR-E + H2S (6)-in addition to the IR-E group, 75 μmol/kg of sodium hydrogen sulfide (NaHS) was administered intraperitoneally 30 min before reperfusion; IR-L (7)-2 h of torsion and 24 h of reperfusion; IR-L + H2S (7)-in addition to the IR-L group, 75 μmol/kg NaHS was administered intraperitoneally 30 min before reperfusion. Biochemically, nitric oxide (NO), malondialdehyde (MDA), superoxide dismutase (SOD), reductive glutathione (GSH), and tumor TNF-α levels were measured in the testis. Serum TNF-α levels were also measured. Hematoxylin and eosin (H & E) was used for histopathological staining and microscopic findings were examined. The Johnsen score was performed to assess spermatogenesis activity in the testis. Apoptosis protease activating factor-1 (Apaf-1) and inducible nitric oxide synthase (iNOS) activity were evaluated immunohistochemically as well. Statistical analyses were made by the Chi-squared test and one-way analysis of variance. RESULTS MDA and NO levels were significantly increased in the IR-L group compared with sham and which decreased by the addition of H2S treatment to the IR-L group (p < 0.05) in biochemical evaluation. GSH vs SOD levels were decreased in the IR-L group compared with sham and which increased by the addition of H2S treatment to the IR-L group, but this correlations were not statistically significant (p > 0.05). Tissue and serum TNF-α levels were significantly increased in the IR-E group compared with sham and which decreased by the addition of H2S treatment to the IR-E group. Johnsen score was the lowest in IR-L group (p < 0.05). Apaf-1 and iNOS activity were significantly increased in the IR-L group compared with sham and which decreased by the addition of H2S treatment to the IR-L group (p < 0.05) in immunohistochemical evaluation. CONCLUSIONS First, the authors would like to say that H2S treatment is protective and it is against ischemia reperfusion injury in testicular torsion. The anti-inflammatory, antioxidant, and antiapoptotic properties of H2S caused protective effect as shown in this study.
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Affiliation(s)
- M Bozkurt
- Mus State Hospital, Department of Urology, Mus, Turkey.
| | - R B Degirmentepe
- University of Health Sciences, Okmeydani Training and Research Hospital, Department of Urology, Istanbul, Turkey
| | - E C Polat
- University of Health Sciences, Okmeydani Training and Research Hospital, Department of Urology, Istanbul, Turkey
| | - F Yildirim
- Istanbul University- Cerrahpasa, Faculty of Veterinary Medicine, Department of Pathology, Istanbul, Turkey
| | - K Sonmez
- Istanbul University- Cerrahpasa, Faculty of Veterinary Medicine, Department of Pathology, Istanbul, Turkey
| | - M Cekmen
- Istanbul Medeniyet University, Department of Biochemistry, Istanbul, Turkey
| | - C Eraldemir
- Kocaeli University, Faculty of Medicine, Department of Biochemistry, Kocaeli, Turkey
| | - A Otunctemur
- University of Health Sciences, Okmeydani Training and Research Hospital, Department of Urology, Istanbul, Turkey
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Ahveninen J, Ingalls G, Yildirim F, Calabro FJ, Vaina LM. Peripheral visual localization is degraded by globally incongruent auditory-spatial attention cues. Exp Brain Res 2019; 237:2137-2143. [PMID: 31201472 DOI: 10.1007/s00221-019-05578-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2019] [Accepted: 06/07/2019] [Indexed: 11/26/2022]
Abstract
Global auditory-spatial orienting cues help the detection of weak visual stimuli, but it is not clear whether crossmodal attention cues also enhance the resolution of visuospatial discrimination. Here, we hypothesized that if anywhere, crossmodal modulations of visual localization should emerge in the periphery where the receptive fields are large. Subjects were presented with trials where a Visual Target, defined by a cluster of low-luminance dots, was shown for 220 ms at 25°-35° eccentricity in either the left or right hemifield. The Visual Target was either Uncued or it was presented 250 ms after a crossmodal Auditory Cue that was simulated either from the same or the opposite hemifield than the Visual Target location. After a whole-screen visual mask displayed for 800 ms, a pair of vertical Reference Bars was presented ipsilateral to the Visual Target. In a two-alternative forced choice task, subjects were asked to determine which of these two bars was closer to the center of the Visual Target. When the Auditory Cue and Visual Target were hemispatially incongruent, the speed and accuracy of visual localization performance was significantly impaired. However, hemispatially congruent Auditory Cues did not improve the localization of Visual Targets when compared to the Uncued condition. Further analyses suggested that the crossmodal Auditory Cues decreased the sensitivity (d') of the Visual Target localization without affecting post-perceptual decision biases. Our results suggest that in the visual periphery, the detrimental effect of hemispatially incongruent Auditory Cues is far greater than the benefit produced by hemispatially congruent cues. Our working hypothesis for future studies is that auditory-spatial attention cues suppress irrelevant visual locations in a global fashion, without modulating the local visual precision at relevant sites.
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Affiliation(s)
- Jyrki Ahveninen
- Harvard Medical School, Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA.
| | - Grace Ingalls
- Brain and Vision Research Laboratory, Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | - Funda Yildirim
- Brain and Vision Research Laboratory, Department of Biomedical Engineering, Boston University, Boston, MA, USA
| | - Finnegan J Calabro
- Brain and Vision Research Laboratory, Department of Biomedical Engineering, Boston University, Boston, MA, USA
- Department of Psychiatry and Bioengineering, University of Pittsburgh, Pittsburgh, PA, USA
| | - Lucia M Vaina
- Harvard Medical School, Athinoula A. Martinos Center for Biomedical Imaging, Department of Radiology, Massachusetts General Hospital, Charlestown, MA, USA
- Brain and Vision Research Laboratory, Department of Biomedical Engineering, Boston University, Boston, MA, USA
- Department of Neurology, Harvard Medical School, Massachusetts General Hospital and Brigham and Women's Hospital, Boston, MA, USA
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Senarslan DA, Yildirim F, Tetik O. Three Cases of Large-Diameter True Brachial and Axillary Artery Aneurysm and a Review of the Literature. Ann Vasc Surg 2018; 57:273.e11-273.e15. [PMID: 30496904 DOI: 10.1016/j.avsg.2018.08.100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 08/28/2018] [Accepted: 08/30/2018] [Indexed: 11/19/2022]
Abstract
Aneurysms of the upper extremity mostly originate from trauma, mycotic lesions, thoracic outlet syndrome, previous arteriovenous fistulae, and atherosclerosis. True aneurysms of the brachial and axillary artery are encountered rarely. They can be diagnosed by simple physical examination as a pulsatile mass. However, most of these aneurysms remain asymptomatic until a complication occurs. The primary complication seen with the axillary or brachial artery is embolization. We report 3 large-diameter true brachial artery aneurysms extending to the axillary zone. One of the patients had distal digital emboli causing gangrenous lesions at the finger tips and the other 2 patients had pain and ischemic symptoms in the forearm. All underwent surgical repair. After excision of the aneurysmal segment, arterial continuity was ensured by interposition of a reversed saphenous vein in 2 patients and with a biological vascular graft in 1 patient. Although endovascular techniques are improving, most true brachial artery aneurysms are not anatomically suitable for interventional procedures. Open surgery still preserves its value.
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Affiliation(s)
| | - Funda Yildirim
- Department of Cardiovascular Surgery, Manisa Celal Bayar University, Manisa, Turkey
| | - Omer Tetik
- Department of Cardiovascular Surgery, Manisa Celal Bayar University, Manisa, Turkey
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Yilmaz H, Gurel A, Aktas M, Yildirim F, Bamac OE, Haktanir D, Tekelioglu BK, Gur E, Altan Tarakci E, Helps C, Richt JA, Turan N. Clinical Virological and Pathological Investigations on Horses With Neurologic Disorders in Turkey. J Equine Vet Sci 2018. [DOI: 10.1016/j.jevs.2017.08.006] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Yildirim F, Tunç MA. The Effect of Dietary Tarragon (Artemisia Dracunculus) Powders in Different Levels on Carcass Characteristics and Some Internal Organ’s Weight of Broiler Chickens. Rev Bras Cienc Avic 2018. [DOI: 10.1590/1806-9061-2017-0526] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Altinay S, Cabalar M, Isler C, Yildirim F, Celik DS, Zengi O, Tas A, Gulcubuk A. Is Chronic Curcumin Supplementation Neuroprotective Against Ischemia for Antioxidant Activity, Neurological Deficit, or Neuronal Apoptosis in an Experimental Stroke Model? Turk Neurosurg 2018; 27:537-545. [PMID: 27593816 DOI: 10.5137/1019-5149.jtn.17405-16.0] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
AIM To investigate the neuroprotective effect of chronic curcumin supplementation on the rat forebrain prior to ischemia and reperfusion. MATERIAL AND METHODS Forebrain ischemia was induced by bilateral common carotid artery occlusion for 1/2 hour, followed by reperfusion for 72 hours. Older rats were divided into five groups: Group I received 300 mg/kg oral curcumin for 21 days before ischemia and 300 mg/kg intraperitoneal curcumin after ischemia; Group II received 300 mg/kg intraperitoneal curcumin after ischemia; Group III received 300 mg/kg oral curcumin for 21 days before ischemia; Group IV had only ischemia; Group V was the sham-operated group. The forebrain was rapidly dissected for biochemical parameter assessment and histopathological examination. RESULTS In forebrain tissue, enzyme activities of superoxide dismutase, glutathione peroxidase, and catalase were significantly higher in Group I than Groups II or III (p < 0.05) while xanthine dehydrogenase and malondialdehyde enzyme activities and concentrations of interleukin-6 and TNF-alpha were significantly lower in Group I when compared to Groups II and III (p < 0.05). A significant reduction in neurological score was observed after 24 and 72 hours in the curcumin-treated groups compared with the ischemic group. We also found a marked reduction in apoptotic index after 72 hours in the groups receiving curcumin. Significantly more TUNEL-positive cells were observed in the ischemic group compared to those treated with curcumin. CONCLUSION We demonstrated the neuroprotective effect of chronic curcumin supplement on biochemical parameters, neurological scores and apoptosis following ischemia and reperfusion injury in rats.
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Affiliation(s)
- Serdar Altinay
- Selcuk University, Medical Faculty, Department of Pathology, Konya, Turkey
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Kara I, Pampal HK, Yildirim F, Dilekoz E, Emmez G, U FP, Kocabiyik M, Demirel CB. Role of ischemic modified albumin in the early diagnosis of increased intracranial pressure and brain death. ACTA ACUST UNITED AC 2017; 118:112-117. [PMID: 28814093 DOI: 10.4149/bll_2017_023] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
AIM Increased intracranial pressure following trauma and subsequent possible development of brain death are important factors for morbidity and mortality due to ischemic changes. We aimed to establish the role of ischemic modified albumin (IMA) in the early diagnosis of the process, starting with increased intracranial pressure and ending with brain death. MATERIALS AND METHODS Eighteen Wistar-Albino rats were divided into three groups; control (CG, n = 6), increased intracranial pressure (ICPG, n = 6), and brain death (BDG, n = 6). Intracranial pressure elevation and brain death were constituted with the inflation of a balloon of a Fogarty catheter in the epidural space. In all three groups, blood samples were drawn before the procedure, and at minutes 150 and 240 for IMA and malondialdehyde (MDA) analysis. RESULTS Serum IMA levels at 150 and 240 minutes were higher in ICPG than in CG (p < 0.05). IMA levels were similar in ICPG and BDG. Serum MDA levels at 150 and 240 minutes increased in ICPG and BDG groups compared to CG (p < 0.05). MDA levels were similar in ICP and BD groups. CONCLUSION IMA should be considered as a biochemical parameter in the process starting from increased intracranial pressure elevation and ending at brain death (Tab. 3, Fig. 5, Ref. 31).
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Yildirim F, Carvalho J, Cornelissen FW. A second-order orientation-contrast stimulus for population-receptive-field-based retinotopic mapping. Neuroimage 2017; 164:183-193. [PMID: 28666882 DOI: 10.1016/j.neuroimage.2017.06.073] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2016] [Revised: 05/31/2017] [Accepted: 06/26/2017] [Indexed: 12/01/2022] Open
Abstract
Visual field or retinotopic mapping is one of the most frequently used paradigms in fMRI. It uses activity evoked by position-varying high luminance contrast visual patterns presented throughout the visual field for determining the spatial organization of cortical visual areas. While the advantage of using high luminance contrast is that it tends to drive a wide range of neural populations - thus resulting in high signal-to-noise BOLD responses - this may also be a limitation, especially for approaches that attempt to squeeze more information out of the BOLD response, such as population receptive field (pRF) mapping. In that case, more selective stimulation of a subset of neurons - despite reduced signals - could result in better characterization of pRF properties. Here, we used a second-order stimulus based on local differences in orientation texture - to which we refer as orientation contrast - to perform retinotopic mapping. Participants in our experiment viewed arrays of Gabor patches composed of a foreground (a bar) and a background. These could only be distinguished on the basis of a difference in patch orientation. In our analyses, we compare the pRF properties obtained using this new orientation contrast-based retinotopy (OCR) to those obtained using classic luminance contrast-based retinotopy (LCR). Specifically, in higher order cortical visual areas such as LO, our novel approach resulted in non-trivial reductions in estimated population receptive field size of around 30%. A set of control experiments confirms that the most plausible cause for this reduction is that OCR mainly drives neurons sensitive to orientation contrast. We discuss how OCR - by limiting receptive field scatter and reducing BOLD displacement - may result in more accurate pRF localization as well. Estimation of neuronal properties is crucial for interpreting cortical function. Therefore, we conclude that using our approach, it is possible to selectively target particular neuronal populations, opening the way to use pRF modeling to dissect the response properties of more clearly-defined neuronal populations in different visual areas.
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Affiliation(s)
- Funda Yildirim
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, The Netherlands.
| | - Joana Carvalho
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, The Netherlands
| | - Frans W Cornelissen
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, The Netherlands
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Abstract
An unresolved question in vision research is whether perceptual decision making and action are based on the same or on different neural representations. Here, we address this question for a straightforward task, the judgment of location. In our experiment, observers decided on the closer of two peripheral objects—situated on the horizontal meridian in opposite hemifields—and made a saccade to indicate their choice. Correct saccades landed close to the actual (physical) location of the target. However, in case of errors, saccades went in the direction of the more distant object, yet landed on a position approximating that of the closer one. Our finding supports the notion that perception and action-related decisions on object location rely on the same neural representation.
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Affiliation(s)
- Funda Yildirim
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Netherlands
| | - Frans W Cornelissen
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Netherlands
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Yildirim F, Kurdal AT, Ozturk T, Yuksel O, Gozukara C, Taneli F, Horasan GD, Cerrahoglu M. Remote preconditioning protects early renal functions in low risk cardiac surgery patients. J Cardiothorac Vasc Anesth 2016. [DOI: 10.1053/j.jvca.2016.03.101] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Sonmez K, Altan E, Yildirim F, Arun SS, Turan N, Yilmaz H, Kuskucu MA. Investigation of human papillomaviruses (HPV), mouse mammary tumour virus (MMTV), Epstein–Barr virus (EBV), and human polyomavirus entities in canine mammary tumours. J Vet Res 2016. [DOI: 10.1515/jvetres-2016-0008] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Abstract
Introduction: The aim of the study was to investigate the presence of human papillomaviruses (HPV), mouse mammary tumour virus (MMTV), Epstein-Barr virus (EBV), and human polyomavirus BK in canine mammary tumours (CMTs) and to correlate the results of histopathological classification with the results of virological examination. Material and Methods: Eighty CMTs and ten normal canine mammary gland samples were evaluated using histopathological methods and TaqMan real-time PCR analysis. Results: The results indicated that all mammary tumours and normal mammary tissue samples were negative for HPV16 and other HPV, EBV, human polyomavirus, and human mammary tumour virus strains. Conclusion: Further studies should be performed to investigate the existence of other strains of HPV, EBV, and human polyomavirus in CMTs.
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Affiliation(s)
| | - Eda Altan
- Virology Department, Veterinary Faculty, Istanbul University, 34320, Avcilar, Istanbul, Turkey
| | | | | | - Nuri Turan
- Virology Department, Veterinary Faculty, Istanbul University, 34320, Avcilar, Istanbul, Turkey
| | - Huseyin Yilmaz
- Virology Department, Veterinary Faculty, Istanbul University, 34320, Avcilar, Istanbul, Turkey
| | - Mert Ahmet Kuskucu
- Microbiology and Clinical Bacteriology Department, Cerraphasa Medicine Faculty, Istanbul University, 34098, Fatih, Istanbul, Turkey
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Yildirim F, Tuncer B, Ozbakkaloglu A, Kurdal AT, Ozturk T, Iskesen I. Thromboelastogram reduces blood use by inspecting coagulation in heart surgery. Asian Cardiovasc Thorac Ann 2016; 24:441-4. [PMID: 27130495 DOI: 10.1177/0218492316647229] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVE Blood transfusion after coronary artery bypass surgery is carried out according to general coagulation tests and blood counts. Our aim was to determine the effects of rotational thromboelastography results on the amount of blood products used in the intraoperative and postoperative periods in coronary artery bypass patients. METHODS Our study included 164 patients who underwent coronary artery bypass. A control group was formed from 82 patients picked from hospital records, who had elective coronary artery bypass before the introduction of rotational thromboelastography in our clinic. Blood transfusion was performed in this group according to conventional laboratory data. The study group comprised 82 patients who had elective coronary artery bypass after the introduction of rotational thromboelastography. Blood transfusion was performed in the study group according to rotational thromboelastogram results. The amounts of blood products used in the 2 groups were compared. RESULTS There were statistically significant decreases in the intraoperative and postoperative amounts of packed red blood cells (p = 0.012 and p = 0.006) and postoperative whole blood (p = 0.013) used in the study group compared to the control group. Postoperative bleeding was also significantly reduced (p = 0.001) in the study group. CONCLUSION Blood transfusion is an important issue after coronary artery bypass, and because of the decreased amount of blood products used, a rotational thromboelastography-based blood transfusion algorithm should be applied in patients undergoing coronary artery bypass.
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Affiliation(s)
- Funda Yildirim
- Department of Cardiovascular Surgery, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Barıs Tuncer
- Department of Cardiovascular Surgery, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Alper Ozbakkaloglu
- Department of Cardiovascular Surgery, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Adnan Taner Kurdal
- Department of Cardiovascular Surgery, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Tulun Ozturk
- Department of Anesthesiology, Celal Bayar University Faculty of Medicine, Manisa, Turkey
| | - Ihsan Iskesen
- Department of Cardiovascular Surgery, Celal Bayar University Faculty of Medicine, Manisa, Turkey
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Yildirim F, Senarslan DA, Ozturk T, Tetik O. Management of a patient with giant aneurysms in the popliteal and coronary arteries. Interact Cardiovasc Thorac Surg 2016; 22:515-6. [PMID: 27002020 DOI: 10.1093/icvts/ivv372] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2015] [Accepted: 11/09/2015] [Indexed: 11/13/2022] Open
Abstract
Coexistence of multiple peripheric arterial and coronary artery aneurysms of different sizes is extremely rare in young adults. We present a case of rare giant coronary aneurysm and concurrent giant left popliteal aneurysm treated with classical open repair.
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Affiliation(s)
- Funda Yildirim
- Department of Cardiovascular Surgery, Celal Bayar University, Manisa, Turkey
| | | | - Tulun Ozturk
- Department of Anesthesiology and Reanimation, Celal Bayar University, Manisa, Turkey
| | - Omer Tetik
- Department of Cardiovascular Surgery, Celal Bayar University, Manisa, Turkey
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Yildirim F, Ozbakkaloglu A, Ozturk T, Tetik O. Bentall Operation in a Patient With Severe Hemophilia A and Marfan Syndrome by Use of a Biologic Composite Graft. Ann Thorac Surg 2016; 101:e69-70. [DOI: 10.1016/j.athoracsur.2015.09.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 08/27/2015] [Accepted: 09/08/2015] [Indexed: 10/22/2022]
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Bakirel T, Alkan FÜ, Üstüner O, Çinar S, Yildirim F, Erten G, Bakirel U. Synergistic growth inhibitory effect of deracoxib with doxorubicin against a canine mammary tumor cell line, CMT-U27. J Vet Med Sci 2016; 78:657-68. [PMID: 26822118 PMCID: PMC4873858 DOI: 10.1292/jvms.15-0387] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Cyclooxygenase (COX) inhibitors have been shown to exert anti-angiogenic and anti-tumor
activities on many types of malignant tumors. These anticancer properties make it
worthwhile to examine the possible benefit of combining COX inhibitors with other
anti-cancer agents. In the present study, we evaluated the potential of deracoxib (DER) in
potentiating antitumor activity of doxorubicin (DOX) in canine mammary carcinoma cells
(CMT-U27). DER (50–250 µM) enhanced the antiproliferative activity of DOX
by reducing the IC50 (approximately 3- to 3.5 fold). Interaction analysis of
the data showed that combinations of DOX at 0.9 µM with DER (100–250
µM) produced synergism in the CMT-U27 cell line, with a ratio index
ranging from 1.98 to 2.33. In additional studies identifying the mechanism of observed
synergistic effect, we found that DER strongly potentiated DOX-caused
G0/G1 arrest in cell cycle progression. Also, DER (100–250
µM) augmented apoptosis induction with approximately 1.35- and 1.37-
fold increases in apoptotic response caused by DOX in the cells. DER enhanced the
antiproliferative effect of DOX in conjunction with induction of apoptosis by modulation
of Bcl-2 expression and changes in the cell cycle of the CMT-U27 cell line. Although the
exact molecular mechanism of the alterations in the cell cycle and apoptosis observed with
DER and DOX combinations require further investigations, the results suggest that the
synergistic effect of DOX and DER combinations in CMT therapy may be achieved at
relatively lower doses of DOX with lesser side effects. Therefore, combining DER with DOX
may prove beneficial in the clinical treatment of canine mammary cancer.
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Affiliation(s)
- Tülay Bakirel
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, Istanbul University, Istanbul, 34320, Turkey
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Yildirim F, Iskesen I, Kurdal AT, Ozturk T, Taneli F, Gozukara C, Ozbakkaloglu A. Is "Attenuation of Oxidative Stress" Helpful to Understand the Mechanism of Remote Ischemic Preconditioning in Cardiac Surgery? J Cardiothorac Vasc Anesth 2015; 30:134-40. [PMID: 26411813 DOI: 10.1053/j.jvca.2015.06.027] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/27/2015] [Indexed: 11/11/2022]
Abstract
OBJECTIVES The aim of this study was to determine the effect of remote ischemic preconditioning (RIPC) on markers of cardiac ischemia and response to oxidative stress in patients undergoing coronary artery bypass grafting (CABG) surgery. DESIGN A prospective, randomized, and blinded study. SETTING A single-center university hospital. PARTICIPANTS This study included patients who underwent isolated CABG surgery with cardiopulmonary bypass who were selected carefully to prevent confounding with factors known to affect markers of ischemia-reperfusion and response to oxidative stress. INTERVENTIONS The authors randomly assigned patients to RIPC to the left lower extremity using a blood pressure cuff (study group) or a cuff that was applied but not inflated or deflated (control group). MEASUREMENTS AND MAIN RESULTS At 6 hours after CABG surgery, high-sensitivity cardiac troponin T levels were significantly lower in the study group than in the control group. Levels of superoxide dismutase, an antioxidant enzyme, were significantly greater 15 minutes after release of the cross-clamp in the study group, whereas malondialdehyde levels were lower (not significantly) at 1 and 15 minutes after release of the cross-clamp. Hemodynamic parameters were not significantly different at any time point during the study. CONCLUSIONS The authors' method of RIPC before CABG surgery resulted in less myocardial ischemia, as indicated by lower troponin levels. Changes in levels of endogenous antioxidant enzymes supported the hypothesis that this protection from ischemia-reperfusion injury was related to scavenging of free oxygen radicals. Future studies might include a more heterogeneous population and medications that lower the body's response to oxidative stress.
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Affiliation(s)
| | | | | | | | - Fatma Taneli
- Biochemistry, Celal Bayar University, School of Medicine, Manisa, Turkey
| | - Ceyhun Gozukara
- Biochemistry, Celal Bayar University, School of Medicine, Manisa, Turkey
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Yildirim F, Ozbakkaloglu A, Yuksel O, Kurdal T, Ozturk T, Cerrahoglu M, Iskesen I, Tetik O. PP-151 Multiple Peripheric Emboli and Mycotic Aneurysm in Mitral Valve Endocarditis Patient. Am J Cardiol 2015. [DOI: 10.1016/j.amjcard.2015.01.508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Yildirim F, Meyer V, Cornelissen FW. Eyes on crowding: crowding is preserved when responding by eye and similarly affects identity and position accuracy. J Vis 2015; 15:21. [PMID: 25686624 DOI: 10.1167/15.2.21] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Peripheral vision guides recognition and selection of targets for eye movements. Crowding—a decline in recognition performance that occurs when a potential target is surrounded by other, similar, objects—influences peripheral object recognition. A recent model study suggests that crowding may be due to increased uncertainty about both the identity and the location of peripheral target objects, but very few studies have assessed these properties in tandem. Eye tracking can integrally provide information on both the perceived identity and the position of a target and therefore could become an important approach in crowding studies. However, recent reports suggest that around the moment of saccade preparation crowding may be significantly modified. If these effects were to generalize to regular crowding tasks, it would complicate the interpretation of results obtained with eye tracking and the comparison to results obtained using manual responses. For this reason, we first assessed whether the manner by which participants responded—manually or by eye—affected their performance. We found that neither recognition performance nor response time was affected by the response type. Hence, we conclude that crowding magnitude was preserved when observers responded by eye. In our main experiment, observers made eye movements to the location of a tilted Gabor target while we varied flanker tilt to manipulate target-flanker similarity. The results indicate that this similarly affected the accuracy of peripheral recognition and saccadic target localization. Our results inform about the importance of both location and identity uncertainty in crowding.
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Affiliation(s)
- Funda Yildirim
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Vincent Meyer
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Frans W Cornelissen
- Laboratory of Experimental Ophthalmology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Kurdal AT, Yildirim F, Ozbakkaloglu A, Iskesen I, Tetik O. Ultrasound-guided catheter-directed foam sclerotherapy for great saphenous vein. MINERVA CHIR 2015; 70:33-36. [PMID: 25650651] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
AIM The problem of varicose veins in the lower leg is a common disease and associated with long-term morbidity. It has usually been treated using high ligation with stripping and endovenous ablation surgery of the great saphenous vein. The aim of this paper is to report our own series of patients treated by ultrasound guided catheter directed foam sclerotherapy for the chemical ablation of great saphenous vein. METHODS The study involved 108 legs with symptomatic varicose veins (C2-4) secondary to great saphenous vein insufficiency. The great saphenous vein was accessed at knee level. With the method of Tessari sclerosant foam was made (2 mL 3% polidocanol and 8 mL air) and delivered along the great saphenous vein while the catheter was withdrawn. At two and fifty two weeks after treatment the patients were evaluated. RESULTS Catheter-directed foam sclerotheraphy was successfully performed in all of the patients. Venous Clinic Severity Score was reduced significantly (P<0.05). Eighty nine percent of the GSV were completely occluded, 4% were partly occluded and 7% were recanalized. No serious side-effects occurred. CONCLUSION Catheter-directed foam sclerotheraphy is a safe, simple and minimally invasive procedure. Patient satisfaction was good and the occlusion rate is promising after a single treatment.
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Affiliation(s)
- A T Kurdal
- Department of Cardiovascular Surgery Celal Bayar University Medical Faculty Manisa, Turkey -
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Coskun O, Ucar M, Yildirim F, Cetinkaya R, Bolay H. EHMTI-0353. MR tractography in short lasting unilateral neuralgiform headache attacks with conjunctival injection and tearing (SUNCT) patients: case reports. J Headache Pain 2014. [PMCID: PMC4182051 DOI: 10.1186/1129-2377-15-s1-i10] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Yildirim F, Cornelissen FW. Crowding is similar for eye movements and manual responses. J Vis 2014. [DOI: 10.1167/14.10.789] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
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Yildirim A, Sakin M, Karadag Y, Gokmen S, Kandemir N, Akkaya MS, Yildirim F. Genetic Marker Mediated Transfer of an Alien Gene,PM21, into Wheat Conferring Resistance to Powdery Mildew. BIOTECHNOL BIOTEC EQ 2014. [DOI: 10.1080/13102818.2004.10817081] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022] Open
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Gulcubuk A, Haktanir D, Cakiris A, Ustek D, Guzel O, Erturk M, Yildirim F, Akyazi I, Cicekci H, Durak MH, Sandikci-Altunatmaz S, Altunatmaz K. The effects of resveratrol on tissue injury, oxidative damage, and pro-inflammatory cytokines in an experimental model of acute pancreatitis. J Physiol Biochem 2014; 70:397-406. [PMID: 24549589 DOI: 10.1007/s13105-014-0317-4] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2013] [Accepted: 01/22/2014] [Indexed: 01/19/2023]
Abstract
Acute pancreatitis (AP) is an acute inflammatory condition that results from the digestion of pancreatic tissue by its own enzymes released from the acinar cells. The objective of this study was to investigate the effects of resveratrol on oxidative damage, pro-inflammatory cytokines, and tissue injury involved with AP induced in a rat model using sodium taurocholate (n = 60). There were three treatment groups with 20 rats per group. Groups I and II received 3% sodium taurocholate solution, while group III underwent the same surgical procedure yet did not receive sodium taurocholate. In addition, group II received 30 mg/kg resveratrol solution. Rats were sacrificed at 2, 6, 12, and 24 h time points following the induction of AP. Blood and pancreatic tissue samples were collected and subjected to biochemical assays, Western blot assays, and histopathologic evaluations. Resveratrol did not reduce trypsin levels and prevent tissue damage. Resveratrol prevented IκB degradation (except for 6 h) and decreased nuclear factor-κB (NF-κB), activator protein-1 (AP-1) (except for 24 h), and levels of TNF-α, IL-6 (except for 24 h), and iNOS in the pancreatic tissue at all time points (P < 0.05). Serum nitric oxide (NO) levels were reduced as well (P < 0.05). Thus, we concluded that resveratrol did not reduce trypsin levels and did not prevent tissue injury despite the reduction in oxidative damage and pro-inflammatory cytokine levels detected in this model of AP.
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Affiliation(s)
- Ahmet Gulcubuk
- Department of Pathology, Faculty of Veterinary Medicine, Istanbul University, 34320, Avcilar,, Istanbul, Turkey,
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Akar ME, Ozkan O, Ozekinci M, Sindel M, Yildirim F, Oguz N. Uterus retrieval in cadaver: technical aspects. CLIN EXP OBSTET GYN 2014; 41:293-295. [PMID: 24992779] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The authors describe uterus retrieval in cadavers. Uterine retrieval with its vasculature could be successfully achieved in four of the presented cases. Special attention was given to dissection of bilateral ureters and hypogastric vasculature. Uterine retrieval with its vasculature and supporting sacrouterine,vesicouterine peritoneal folds is an anatomically feasible procedure in preparation for uterus transplantation.
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Turan N, Yildirim F, Altan E, Sennazli G, Gurel A, Diallo I, Yilmaz H. Molecular and pathological investigations of EHV-1 and EHV-4 infections in horses in Turkey. Res Vet Sci 2012; 93:1504-7. [PMID: 22401978 DOI: 10.1016/j.rvsc.2012.01.019] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2011] [Revised: 01/11/2012] [Accepted: 01/29/2012] [Indexed: 11/24/2022]
Abstract
The aim of the present study was to investigate abortion storms that occurred in the Marmara region of Turkey in 2008-2009 using a real-time PCR. Two aborted foetuses were necropsied and histo-pathological findings reported herein. Ten lungs, 3 brains and one nasal swab from 10 aborted foetuses, 6 nasal swabs and 3 vaginal swabs from aborting mares were included in this study. EHV-1 was isolated from the lung, liver and brain of 1 aborted foetus. EHV-1 DNA was detected in the lungs, livers and spleens of 2 necropsied foetuses and in 3 lungs from 10 foetuses submitted for diagnosis. A brain from one of the aborted foetuses was also positive for EHV-1 DNA. EHV-4 DNA was detected only in a nasal swab of one of the tested foetuses. Neither EHV-1 nor EHV-4 DNA was detected in the swabs of aborting mares. Sequence analysis of the glycoprotein B of the strains was performed and a phylogenetic tree was generated. The results indicated that 4 of the 5 Turkish EHV-1 strains (TR02, TR03, TR04 and TR05) clustered together; the fifth strain (TR01) was slightly removed from the group and clustered with other EHV-1 from various origins. Single nucleotide polyporphism (SNP in ORF30) associated with neuropathogenesis was not detected in any of the strains. At necropsy, sub-milier focal necrosis in the liver and spleen was observed. Microscopically, focal coagulation necrosis and marked eosinophilic intranuclear and intracytoplasmic inclusion bodies in the hepatocytes localised around the necrotic areas in the liver. Severe coagulation necrosis in white pulp of the spleen was also observed.
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Affiliation(s)
- Nuri Turan
- University of Istanbul, Veterinary Faculty, Department of Virology, Avcilar, Istanbul, Turkey
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Ilhan I, Yildirim F, Dertli N, Turan M, Tarihci S. A destructive urban transformation project resulting with a social transformation process in Ankara-Turkey. Eur Psychiatry 2011. [DOI: 10.1016/s0924-9338(11)72250-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022] Open
Abstract
IntroductionDikmen Valley is a slum district where the Municipality of Ankara intended to start an urban transformation project. Dikmen neighborhood includes nearly 1000 houses which the Municipiality attempted to pull down suddenly at night in the winter of 2007.Residents of Dikmen Valley resisted and managed to stop this attempt. Whole event was experienced as an acute trauma as well as a continuous experience of anxiety because of ongoing risk of another attack.AimThe aim of the present study was to investigate the psychological consequences of the whole process.MethodsThe study sample consisted of 201 individuals from 106 households, and a total of 178 individuals from 102 households was taken as comparison group from another slum neighborhood where residents did not experience any threat to their houses. The Beck Depression Inventory, the Spielberger Trait Anxiety Scale, and the General Self-Efficacy Scale were used for assessment.ResultsDikmen sample was found to have a statistically significant higher mean score of anxiety and depression compared to the comparison group. Dikmen had a higher level of general self-efficacy belief than the comparison group after controlling for depression and anxiety scores.ConclusionsAlthough the traumatic process after an attack of pulling down and the threat of losing one's house resulted with a depressive state and anxiety in Dikmen residents, unexpectedly they had a high level of general self-efficacy. To the researchers’ observations, a social transformational process has been realized resulting with an overall high general self-efficacy level in Dikmen neighborhood.
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Gursel G, Aydogdu M, Gulbas G, Ozkaya S, Tasyurek S, Yildirim F. The influence of severe obesity on non-invasive ventilation (NIV) strategies and responses in patients with acute hypercapnic respiratory failure attacks in the ICU. Minerva Anestesiol 2011; 77:17-25. [PMID: 21273965] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
BACKGROUND Obesity rates are increasing in the general population and are also prevalent in intensive care units (ICUs). Patients are sometimes admitted to ICUs for hypercapnic respiratory failure or cor pulmonale, but more often, they are admitted for pneumonia, excessive daytime sleepiness, heart failure, chronic obstructive pulmonary disease (COPD), asthma attacks or pulmonary embolism, and hypercapnic respiratory failure is coincidentally noticed during this period. The optimal noninvasive mechanical ventilation strategy is often not used during ICU treatment. The aim of this study was to assess the differences between non-invasive ventilation (NIV) strategies and the outcomes of obese and non-obese patients with acute hypercapnic respiratory failure. METHODS In this retrospective cohort study, 73 patients who were ventilated with a face mask were studied. Patients were divided into two groups: obese (BMI>35 kg/m2) and non-obese (BMI<35 kg/m2), and the differences between these two groups in necessary pressure, volume, mode, ventilator and time to reduce PaCO2 <50 mmHg were investigated. RESULTS The mean age of the patients was 66 ± 14 years, and the mean admission APACHE II score was 18 ± 4. Forty-one (56%) of the patients were female. For the obese patients, the reason for ICU admission was more frequently pulmonary edema and less frequently pulmonary infections, which was significantly different (P=0.003 and 0.043, respectively) than the rates for the non-obese patients. While there was no significant difference across the groups between the ventilators, modes and inspiratory pressure levels, obese patients required higher end-expiratory pressure levels and more time to reduce their PaCO2 levels below 50 mmHg than non-obese patients. The lengths of NIV and ICU stay and intubation and the mortality rates were similar in both groups. CONCLUSION These results suggest that improvement in hypercapnia in obese patients may require higher PEEP levels and longer times than that of non-obese patients during acute hypercapnic respiratory failure attack.
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Affiliation(s)
- G Gursel
- Department of Pulmonary Critical Care Medicine, Gazi University School of Medicine, Ankara, Turkey
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Iskesen I, Kurdal AT, Yildirim F, Cerrahoglu M, Sirin H. Pleura preservation during coronary operation does not have any beneficial effect on respiratory functions. MINERVA CHIR 2009; 64:419-425. [PMID: 19648862] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
AIM According to some reports the destruction the integrity of the pleura during acute myocardial infarction (AMI) harvesting during coronary surgery may also impair respiratory function in the postoperative period. The purpose of this study was to evaluate the influence of preserved integrity of pleura on respiratory function in patients undergoing coronary artery bypass grafting (CABG). METHODS One hundred and forty-three patients who had on-pump-CABG operation with pedunculated LIMA graft were divided to 2 groups. The first group is the study group that pleura opened (group OP; N=69), and the other group is that their pleura protected (group C, N=74). All patients were evaluated with using respiratory function test parameters (functional vital capacity [FVC], force expiratory volume %-at the 1st second [FEV1%] in the preoperative period and on the 7th postoperative day). Respiratory problems, blood drainage amounts and used blood products in the postoperative period were measured. RESULTS Preoperative FVC values were not different between the two groups (3.08+/-0.5 in group C and 3.37+/-0.7 L in OP group) (P>0.05). On the VII postoperative day this parameter did not show any significant difference between the groups (2.80+/-0.6 in group C and 2.75+/-0.5 liter in OP group) (P>0.05). Preoperative FEV1% values did not show any difference (77.6+/-4.6% and 76.0+/-2.7% in OP and C groups respectively. There was no significant difference between the postoperative FEV1% values (71.8+/-5.1% and 73.4+/-6.3% respectively) (P>0.05). Patients with protected pleura had significantly lower blood drainage and whole blood unit transfusion (P<0.05). CONCLUSIONS Preservation of the pleural integrity during LIMA harvesting significantly reduces postoperative bleeding but not affects pulmonary functions.
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Affiliation(s)
- I Iskesen
- Department of Cardiovascular Surgery, Celal Bayar University, School of Medicine, Manisa, Turkey.
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Gokbulut C, Cirak VY, Senlik B, Yildirim F, McKellar QA. Pharmacological assessment of netobimin as a potential anthelmintic for use in horses: plasma disposition, faecal excretion and efficacy. Res Vet Sci 2008; 86:514-20. [PMID: 19022462 DOI: 10.1016/j.rvsc.2008.10.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2008] [Revised: 07/10/2008] [Accepted: 10/01/2008] [Indexed: 11/30/2022]
Abstract
This study aimed to determine the plasma disposition and faecal excretion of netobimin (NTB) and its respective metabolites as well as the efficacy against strongyles in horses following oral administration. Netobimin (10mg/kg) was administered orally to 8 horses. Blood and faecal samples were collected from 1 to 120h post-treatment and analysed by high performance liquid chromatography (HPLC). Using a chiral phase-based HPLC, plasma disposition of ABZSO enantiomers produced was also determined. Faecal strongyle egg counts (EPG) were performed by a modified McMaster's technique before and after the treatment. Neither NTB nor ABZ were present and only albendazole sulphoxide (ABZSO) and sulphone metabolites (ABZSO(2)) were detected in the plasma samples. Maximum plasma concentration of ABZSO (0.53+/-0.14microg/ml) and ABZSO(2) (0.36+/-0.09microg/ml) were observed at (t(max)) 10.50 and 19.50h, respectively following administration of NTB. The area under the curve (AUC) of the two metabolites was similar to each other. Netobimin was not detected, and ABZ was predominant in faecal samples. The maximum plasma concentration (C(max)) of (-)ABZSO was significantly higher than (+)ABZSO, but the area under the curves (AUCs) of the enantiomer were not significantly different each other in plasma samples. The enantiomers of ABZSO were close to racemate in the faecal samples analyzed. Netobimin reduced the EPG by 100%, 100%, 77%, 80% and 75% 2, 4, 6, 8 and 10 weeks post-treatment, respectively. The specific behaviour of the two enantiomers probably reflects different enantioselectivity of the enzymatic systems of the liver which are responsible for sulphoxidation and sulphonation of ABZ. Considering the pharmacokinetic and efficacy parameters NTB could be used as an anthelmintic in horses.
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Affiliation(s)
- C Gokbulut
- Department of Pharmacology and Toxicology, Faculty of Veterinary Medicine, University of Adnan Menderes, Aydin, Turkey.
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Cirak VY, Güleğen E, Yildirim F, Durmaz M. A field study on the efficacy of doramectin against strongyles and its egg reappearance period in horses. Dtsch Tierarztl Wochenschr 2007; 114:64-6. [PMID: 17341022] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/14/2023]
Abstract
The aim of the present study was to determine the efficacy and the so-called "egg reappearance period" (ERP) of doramectin in horses naturally infected with strongyles during a period of 34 weeks. A group of yearlings of 10 animals was treated intramuscularly with doramectin at a dose rate of 0.2 mg/kg bodyweight (BW) at the begin of the grazing season. To obtain comparable data, another group of yearlings (n = 10) was treated orally with ivermectin at a dose rate of 0.2 mg/kg BW. Individual faecal samples were examined for strongyle egg counts per gram of faeces (EPG) in two-week intervals. Twelve weeks later, a second treatment was given in both groups with the respective anthelmintic followed by a third treatment when the group mean egg count reached > or = 200 EPG. The efficacy of doramectin was > or = 96 % and that of ivermectin 100%, based on the mean egg counts two weeks post treatments (wpt). The highest and the lowest extensity of the efficacy (average values) for doramectin were 90% and 41% two and ten wpt, respectively, whereas these values for ivermectin differed from 100% (two wpt) to 24.3% (eight wpt). The ERP was found to be 10 and 8 weeks for doramectin and ivermectin, respectively.
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Affiliation(s)
- V Y Cirak
- Uludag University, Faculty of Veterinary Medicine, Parasitology Department, Gorukle Campus, Bursa, Turkey.
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Abstract
BACKGROUND The aim of this study was to evaluate the relationship between the preoperative N-terminal pro-B-type natriuretic peptide (NT-proBNP) level and the need for the inotropic support in the early postoperative period of patients undergoing coronary artery bypass graft surgery. METHODS AND RESULTS The patients were divided into 2 groups: NT-proBNP level<220 pg/ml (group A, n=26) or >220 pg/ml (group B, n=26). The normal value for NT-proBNP level was accepted as <220 pg/ml. The cardiac output was measured on arrival in intensive care and at the 16th hour. The groups were compared with respect to early postoperative hemodynamic measurements, urinary output, use of inotropic agents and requirement for additional cardiac-assist devices. Left ventricular ejection fraction, cardiac output and cardiac index were lower in group B and inotropic agents were used for a longer period of time and at higher doses in this group (p<0.05). CONCLUSION Measurement of the NT-proBNP level in the period before cardiac surgery can indicate the postoperative prognosis of the patient and may be a predictor of the need for postoperative inotropic treatment.
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Affiliation(s)
- Mustafa Cerrahoglu
- Department of Cardiovascular Surgery, Celal Bayar University School of Medicine, Manisa, Turkey
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Abstract
OBJECTIVE Cognitive brain dysfunction after open heart surgery is a serious complication caused by cardiopulmonary bypass (CPB). The presence of gaseous and/or particulate emboli in the CPB circuit and cerebral hypoperfusion may be the causes of neurologic problems after cardiac operations. METHODS In this prospective study we examined 42 consecutive cardiac surgery patients (24 mitral valve replacement [MVR] and 18 coronary artery bypass grafting [CABG] patients). In addition to determination of clinical measurements, cognitive brain function was measured objectively by P300 auditory-evoked potentials before operation, at day 7, and at 4-month follow-up. Electroencephalographic evaluations were also performed. RESULTS In preoperative measures there was no difference between the groups (peak latencies in the MVR group were 324 +/- 8 milliseconds; CABG group, 318 +/- 6 milliseconds; P > .05). At day 7, cognitive P300 auditory-evoked potentials were significantly impaired (prolonged) in both groups compared to preoperative values (MVR group, 347 +/- 7 milliseconds; CABG group, 342 +/- 7 milliseconds; P < .05). P300 measurements almost returned to normal at 4-month follow-up (MVR group, 331 +/- 6 milliseconds; CABG group, 319 +/- 8 milliseconds; P > .05 compared to preoperative values). One week and 4 months after surgery no difference between the 2 groups could be found (P > .05). CONCLUSION Postoperative patients had prolonged P300 values according to the preoperative measurements and we have not found any difference between the groups whether cardiac chambers were opened or not.
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Affiliation(s)
- Ihsan Iskesen
- Department of Cardiovascular Surgery, Celal Bayar University School of Medicine, Manisa, Turkey.
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