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İrgi T, Baycan ÖF, Güvenç TS, Özcan FB, Atıcı A, Yılmaz Y, Çalişkan M. Concomitant amyloidosis is the primary cause of endothelial and coronary microvascular dysfunction in carpal tunnel syndrome. Am Heart J Plus 2024; 41:100393. [PMID: 38655035 PMCID: PMC11035090 DOI: 10.1016/j.ahjo.2024.100393] [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] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2023] [Revised: 04/09/2024] [Accepted: 04/11/2024] [Indexed: 04/26/2024]
Abstract
Study objectives Patients with carpal tunnel syndrome (CTS) show manifestations of arterial abnormalities, including carotid intimal thickening and increased vascular stiffness. As carpal tunnel syndrome is associated with amyloidosis, we hypothesized that previously observed abnormalities can largely be related with concomitant amyloidosis rather than CTS itself. Design Prospective observational study. Setting Medeniyet University Goztepe Hospital. Participants 61 patients with CTS (of whom 32 had biopsy-proven amyloidosis) and 36 healthy controls. Interventions Subjects underwent ultrasound examinations for the measurement of coronary flow velocity reserve (CFVR), flow-mediated vasodilatation (FMD) and carotid intimal-media thickness (CIMT). Main outcome measures Comparison of CFVR, FMD and CIMT in CTS patients with or without amyloidosis. Results Patients with either CTS or CTS with concomitant amyloidosis (CTS-A) had significantly lower FMD (9.7 % ± 4.0 % in CTS and 10.3 % ± 4.6 % in CTS-A groups, p < 0.05 for both) and CFVR (2.4 (2.1-2.8) in CTS and 1.8 (1.6-2.1) in CTS-A groups, p < 0.001 for both) as compared to controls, while CIMT was only increased in CTS-A group (0.70 (0.60-0.80), p < 0.001). The reduction in CFVR was solely related to an increased basal flow velocity in CTS patients while there was also a reduced hyperemic flow velocity in patients with CTS-A. Conclusion Most arterial phenomena in CTS patients could be attributable to concomitant amyloidosis, although endothelial dysfunction was present even in patients with CTS without amyloidosis.
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Affiliation(s)
- Tuğçe İrgi
- Istanbul Medeniyet University School of Medicine, Department of Cardiology, Istanbul, Turkey
| | - Ömer Faruk Baycan
- Istanbul Medeniyet University School of Medicine, Department of Cardiology, Istanbul, Turkey
| | - Tolga Sinan Güvenç
- Istinye University School of Medicine, Department of Cardiology, Istanbul, Turkey
| | - Fatma Betül Özcan
- Istanbul Medeniyet University School of Medicine, Department of Cardiology, Istanbul, Turkey
| | - Adem Atıcı
- Istanbul Medeniyet University School of Medicine, Department of Cardiology, Istanbul, Turkey
| | - Yusuf Yılmaz
- Istanbul Medeniyet University School of Medicine, Department of Cardiology, Istanbul, Turkey
| | - Mustafa Çalişkan
- Istanbul Medeniyet University School of Medicine, Department of Cardiology, Istanbul, Turkey
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2
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Kaya E, Yılmaz Y. Association of Metabolic Dysfunction-Associated Fatty Liver Disease with Cognitive Impairment and All-Cause Dementia: A Comprehensive Review. Turk J Gastroenterol 2024; 35:76-82. [PMID: 38454238 PMCID: PMC10895887 DOI: 10.5152/tjg.2024.23629] [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] [Received: 12/01/2023] [Accepted: 12/11/2023] [Indexed: 03/09/2024]
Abstract
Metabolic dysfunction-associated fatty liver disease (MAFLD) is a significant public health concern, affecting one-third of the global population and posing a risk for progressive liver disease. MAFLD is characterized by hepatic steatosis and impaired metabolic status, which not only impact the liver but also other systems of the human body, making it a multisystemic disorder. Emerging evidence suggests that MAFLD and its associated pathological pathways may contribute to cognitive impairment, potentially through neuroinflammation and neurodegeneration. Studies have detected cognitive impairment in patients with MAFLD using magnetic resonance imaging, which revealed decreased brain volume and cerebral perfusion, in addition to self-reported cognitive tests. While numerous studies have demonstrated an association between MAFLD and cognitive impairment, the relationship between MAFLD and all-cause dementia remains controversial. However, the shared pathological pathways between MAFLD and dementia, such as systemic inflammation, insulin resistance, gut dysbiosis, hyperammonemia, and vascular dysfunction, indicate the possibility of a common prevention strategy for both diseases. In this review, we provide a summary of the current evidence regarding the association between cognitive impairment, all-cause dementia, and MAFLD.
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Affiliation(s)
- Eda Kaya
- Division of Medicine, Department of Hepatology and Gastroenterology, Universitätsklinikum Knappschaftskrankenhaus Bochum, Ruhr University Bochum, Bochum, Germany
| | - Yusuf Yılmaz
- Department of Gastroenterology, Recep Tayyip Erdogan University School of Medicine, Rize, Turkey
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3
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Çelebi B, Yeni DK, Yılmaz Y, Matur F, Babür C, Öktem MA, Sözen M, Karataş A, Raoult D, Mediannikov O, Fournier PE. Borrelia miyamotoi in wild rodents from four different regions of Turkey. Ticks Tick Borne Dis 2023; 14:102143. [PMID: 36857879 DOI: 10.1016/j.ttbdis.2023.102143] [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: 01/23/2022] [Revised: 12/26/2022] [Accepted: 01/31/2023] [Indexed: 03/03/2023]
Abstract
Borrelia miyamotoi is a tick-borne zoonotic agent that causes hard tick-borne relapsing fever, an emerging disease in humans. Some small mammalian and bird species are reported to be reservoirs of B. miyamotoi. This study aims to examine Borrelia species present in rodents captured from rural areas of Turkey. Blood samples of rodents were initially screened with Borrelia 16S rRNA qPCR. The Borrelia flaB gene was subsequently amplified by conventional PCR, after which all positive samples were sequenced. Borrelia miyamotoi was observed in nine out of 536 blood samples (1.7%) collected from wild rodents. Phylogenetic analysis showed that all positive samples belonged to the European genotype clade of B. miyamotoi. PCR positivity was 5.3%, 3.7%, and 1.8% in Apodemus uralensis, Apodemus flavicollis, and Myodes glareolus, respectively. Borrelia burgdorferi sensu lato that causes Lyme borreliosis in humans could not be detected in the rodents. In this study, presence of B. miyamotoi DNA is reported for the first time in rodents in Turkey.
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Affiliation(s)
- Bekir Çelebi
- Microbiology Reference Laboratory Department, General Directorate of Public Health, Ministry of Health, Ankara, Turkey.
| | - Derya Karataş Yeni
- Veterinary Control Central Research Institute, Bacterial Disease Laboratory, Ankara, Turkey
| | - Yusuf Yılmaz
- Microbiology Reference Laboratory Department, General Directorate of Public Health, Ministry of Health, Ankara, Turkey
| | - Ferhat Matur
- Dokuz Eylul University, Faculty of Science, Biology Department, Izmir, Turkey
| | - Cahit Babür
- Microbiology Reference Laboratory Department, General Directorate of Public Health, Ministry of Health, Ankara, Turkey
| | - Mehmet Ali Öktem
- Dokuz Eylul University, Faculty of Medicine, Department of Microbiology and Clinical Microbiology, Izmir, Turkey
| | - Mustafa Sözen
- Zonguldak Bulent Ecevit University, Faculty of Science, Biology Department, Zonguldak, Turkey
| | - Ahmet Karataş
- Nigde Omer Halisdemir University, Faculty of Science, Biology Department, Nigde, Turkey
| | - Didier Raoult
- Institut Méditerranée-Infection, Marseille, France; Aix-Marseille University, Institut de Recherche pour le Développement (IRD), UMR Microbes Evolution Phylogeny and Infections (MEPHI), Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - Oleg Mediannikov
- Institut Méditerranée-Infection, Marseille, France; Aix-Marseille University, Institut de Recherche pour le Développement (IRD), UMR Microbes Evolution Phylogeny and Infections (MEPHI), Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
| | - Pierre Edouard Fournier
- Institut Méditerranée-Infection, Marseille, France; Aix-Marseille University, Institut de Recherche pour le Développement (IRD), UMR Microbes Evolution Phylogeny and Infections (MEPHI), Institut Hospitalo-Universitaire Méditerranée Infection, Marseille, France
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4
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Yıldız Yorgun N, Kavaz E, Ulaş B, Yılmaz Y, Kıvrak H. Structural and photon/neutron attenuation features of PbNi/CNT nanocomposites: An experimental approach. Progress in Nuclear Energy 2023. [DOI: 10.1016/j.pnucene.2022.104549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Yılmaz Y, Özdemir M, Sanusi K, Fatomi NO, Khoza PB. Aggregation Effect on Phthalocyanine Photocatalytic Degradation Efficiency Using Orange G and Methyl Orange as Test‐pollutant Compounds in Aqueous Medium. ChemistrySelect 2022. [DOI: 10.1002/slct.202202958] [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: 11/07/2022]
Affiliation(s)
- Yusuf Yılmaz
- Department of Chemistry NT Vocational School Gaziantep University Gaziantep 27310 Turkey
| | - Mecit Özdemir
- Department of Food Processing Vocational School of Technical Sciences Kilis 7 Aralik University Kilis Turkey
| | - Kayode Sanusi
- Department of Chemistry Obafemi Awolowo University, Ile-Ife Nigeria
| | | | - Phindile B. Khoza
- School of Chemistry and Physics University of Kwazulu Natal Westville Campus Durban 3629 South Africa
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Yılmaz Y, Üngüren E, Tekin ÖA, Kaçmaz YY. Living with Infection Risk and Job Insecurity during COVID-19: The Relationship of Organizational Support, Organizational Commitment, and Turnover Intention. IJERPH 2022; 19:ijerph19148516. [PMID: 35886371 PMCID: PMC9316448 DOI: 10.3390/ijerph19148516] [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] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/12/2022] [Revised: 07/05/2022] [Accepted: 07/10/2022] [Indexed: 12/13/2022]
Abstract
The COVID-19 outbreak caused a stressful process for hospitality employees in terms of both being infected and experiencing the risk of losing their jobs. Stressful working conditions increase employees’ turnover intentions (TI). This study aims to analyze the relationship among perceived organizational support (POS), organizational commitment (OC), and turnover intention (TI) within the context of employees’ infection status and perceived job insecurity (JI). In this context, the study tests a moderated mediation research model. Having adopted a quantitative research method, data were acquired from 490 respondents who work at five-star accommodation companies in Alanya, Turkey. Findings show that the impact of POS on OC and IT differ according to employees’ infection status during the COVID-19 outbreak and their perceived JI. The findings of the study reveal empirical results in understanding employee attitudes toward companies alongside perceived job insecurity for those who are infected as well as for those who are not. Moreover, the study presents theoretical and practical contributions to reduce the negative impact of job insecurity and risk of infection on turnover intentions, which have been considered to be main sources of stress throughout the pandemic.
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Affiliation(s)
- Yusuf Yılmaz
- Department of Recreation Management, Faculty of Tourism, Akdeniz University, Antalya 07070, Turkey
- Correspondence:
| | - Engin Üngüren
- Department of Business Management, Faculty of Economics, Administrative and Social Sciences, Alanya Alaaddin Keykubat University, Antalya 07450, Turkey;
| | - Ömer Akgün Tekin
- Department of Gastronomy and Culinary Arts, Manavgat Faculty of Tourism, Akdeniz University, Antalya 07600, Turkey;
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Atici A, Tatlisu MA, Baycan OF, Yılmaz Y, Caliskan M. A rare cause of idiopathic right outflow tract premature ventricular contraction: Type-4 renal tubular acidosis. Pacing Clin Electrophysiol 2022; 45:811-814. [PMID: 35067955 DOI: 10.1111/pace.14455] [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: 12/10/2021] [Revised: 01/11/2022] [Accepted: 01/21/2022] [Indexed: 12/29/2022]
Abstract
The premature ventricular contractions (PVCs) have usually good prognosis in patients without structural heart disease. In case of left ventricular ejection fraction depression or symptoms, antiarrhythmic drugs or cardiac ablations could be an option for management. We present a case of a patient with high burden of PVC admitted for cardiac ablation. Preoperative assessment revealed hyperkalemia and metabolic acidosis which ended up with type-4 renal tubular acidosis (RTA). Its rare cause and management may draw attention to the possibility of type -4 RTA as the cause of the PVC, and hyperkalemia.
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Affiliation(s)
- Adem Atici
- Cardiology Department, Istanbul Medeniyet University Faculty of Medicine, Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Mustafa Adem Tatlisu
- Cardiology Department, Istanbul Medeniyet University Faculty of Medicine, Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Omer Faruk Baycan
- Cardiology Department, Istanbul Medeniyet University Faculty of Medicine, Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Yusuf Yılmaz
- Cardiology Department, Istanbul Medeniyet University Faculty of Medicine, Goztepe Training and Research Hospital, Istanbul, Turkey
| | - Mustafa Caliskan
- Cardiology Department, Istanbul Medeniyet University Faculty of Medicine, Goztepe Training and Research Hospital, Istanbul, Turkey
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8
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Mózes FE, Lee JA, Selvaraj EA, Jayaswal ANA, Trauner M, Boursier J, Fournier C, Staufer K, Stauber RE, Bugianesi E, Younes R, Gaia S, Lupșor-Platon M, Petta S, Shima T, Okanoue T, Mahadeva S, Chan WK, Eddowes PJ, Hirschfield GM, Newsome PN, Wong VWS, de Ledinghen V, Fan J, Shen F, Cobbold JF, Sumida Y, Okajima A, Schattenberg JM, Labenz C, Kim W, Lee MS, Wiegand J, Karlas T, Yılmaz Y, Aithal GP, Palaniyappan N, Cassinotto C, Aggarwal S, Garg H, Ooi GJ, Nakajima A, Yoneda M, Ziol M, Barget N, Geier A, Tuthill T, Brosnan MJ, Anstee QM, Neubauer S, Harrison SA, Bossuyt PM, Pavlides M. Diagnostic accuracy of non-invasive tests for advanced fibrosis in patients with NAFLD: an individual patient data meta-analysis. Gut 2022; 71:1006-1019. [PMID: 34001645 PMCID: PMC8995830 DOI: 10.1136/gutjnl-2021-324243] [Citation(s) in RCA: 172] [Impact Index Per Article: 86.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2021] [Revised: 04/23/2021] [Accepted: 04/29/2021] [Indexed: 12/11/2022]
Abstract
OBJECTIVE Liver biopsy is still needed for fibrosis staging in many patients with non-alcoholic fatty liver disease. The aims of this study were to evaluate the individual diagnostic performance of liver stiffness measurement by vibration controlled transient elastography (LSM-VCTE), Fibrosis-4 Index (FIB-4) and NAFLD (non-alcoholic fatty liver disease) Fibrosis Score (NFS) and to derive diagnostic strategies that could reduce the need for liver biopsies. DESIGN Individual patient data meta-analysis of studies evaluating LSM-VCTE against liver histology was conducted. FIB-4 and NFS were computed where possible. Sensitivity, specificity and area under the receiver operating curve (AUROC) were calculated. Biomarkers were assessed individually and in sequential combinations. RESULTS Data were included from 37 primary studies (n=5735; 45% women; median age: 54 years; median body mass index: 30 kg/m2; 33% had type 2 diabetes; 30% had advanced fibrosis). AUROCs of individual LSM-VCTE, FIB-4 and NFS for advanced fibrosis were 0.85, 0.76 and 0.73. Sequential combination of FIB-4 cut-offs (<1.3; ≥2.67) followed by LSM-VCTE cut-offs (<8.0; ≥10.0 kPa) to rule-in or rule-out advanced fibrosis had sensitivity and specificity (95% CI) of 66% (63-68) and 86% (84-87) with 33% needing a biopsy to establish a final diagnosis. FIB-4 cut-offs (<1.3; ≥3.48) followed by LSM cut-offs (<8.0; ≥20.0 kPa) to rule out advanced fibrosis or rule in cirrhosis had a sensitivity of 38% (37-39) and specificity of 90% (89-91) with 19% needing biopsy. CONCLUSION Sequential combinations of markers with a lower cut-off to rule-out advanced fibrosis and a higher cut-off to rule-in cirrhosis can reduce the need for liver biopsies.
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Affiliation(s)
- Ferenc Emil Mózes
- Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Jenny A Lee
- Department of Epidemiology and Data Science, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Emmanuel Anandraj Selvaraj
- Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK,Translational Gastroenterology Unit, University of Oxford, Oxford, Oxfordshire, UK,NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust and the University of Oxford, Oxford, UK
| | | | - Michael Trauner
- Division of Gastroenterology and Hepatology, Department of Medicine III, Medical University of Vienna, Vienna, Austria
| | - Jerome Boursier
- Laboratoire HIFIH, UPRES EA 3859, SFR ICAT 4208, Universite d'Angers, Angers, Pays de la Loire, France,Service d'Hepato-Gastroenterologie et Oncologie Digestive, Centre Hospitalier Universitaire d'Angers, Angers, Pays de la Loire, France
| | | | - Katharina Staufer
- Division of Gastroenterology and Hepatology, Department of Medicine III, Medical University of Vienna, Vienna, Austria,Department of Visceral Surgery and Medicine, Inselspital University Hospital Bern, Bern, Switzerland,Department of Surgery, Division of Transplantation, Medical University of Vienna, Vienna, Austria
| | - Rudolf E Stauber
- Department of Internal Medicine, Medical University of Graz, Graz, Austria
| | | | - Ramy Younes
- Boehringer Ingelheim International GmbH, Ingelheim, Rheinland-Pfalz, Germany
| | - Silvia Gaia
- Medical Sciences, University of Turin, Torino, Italy
| | - Monica Lupșor-Platon
- Department of Ultrasonography, University of Medicine and Pharmacy, Regional Institute of Gastroenterology and Hepatology “Prof. Dr. Octavian Fodor”, Cluj Napoca, Romania
| | - Salvatore Petta
- Section of Gastroenterology and Hepatology, PROMISE, Palermo, Italy
| | - Toshihide Shima
- Hepatology Center, Saiseikai Suita Hospital, Suita, Osaka, Japan
| | - Takeshi Okanoue
- Hepatology Center, Saiseikai Suita Hospital, Suita, Osaka, Japan
| | - Sanjiv Mahadeva
- Faculty of Medicine, Department of Medicine, University of Malaya, Kuala Lumpur, Wilayah Persekutuan, Malaysia
| | - Wah-Kheong Chan
- Faculty of Medicine, Department of Medicine, University of Malaya, Kuala Lumpur, Wilayah Persekutuan, Malaysia
| | - Peter J Eddowes
- NIHR Biomedical Research Centre, University of Birmingham, Birmingham, UK,NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, Nottinghamshire, UK
| | - Gideon M Hirschfield
- Toronto Centre for Liver Disease, University Health Network, Toronto, Ontario, Canada
| | - Philip Noel Newsome
- NIHR Biomedical Research Centre, University of Birmingham, Birmingham, UK,Centre for Liver and Gastrointestinal Research, Institute of Immunology and Immunotherapy, University of Birmingham, Birmingham, UK,Liver Unit, University Hospitals Birmingham NHS Foundation Trust, Birmingham, UK
| | - Vincent Wai-Sun Wong
- Department of Medicine and Therapeutics, Chinese University of Hong Kong, Hong Kong, Hong Kong
| | - Victor de Ledinghen
- Centre d'Investigation de la Fibrose Hépatique, Hopital Haut-Leveque, Pessac, France,INSERM1053, Universite de Bordeaux, Talence, Aquitaine, France
| | - Jiangao Fan
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Feng Shen
- Department of Gastroenterology, Xinhua Hospital, Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Jeremy F Cobbold
- Translational Gastroenterology Unit, University of Oxford, Oxford, Oxfordshire, UK,NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust and the University of Oxford, Oxford, UK
| | - Yoshio Sumida
- Department of Internal Medicine, Aichi Medical University, Nagakute, Aichi, Japan
| | - Akira Okajima
- Department of Gastroenterology, Koseikai Takeda Hospital, Kyoto, Japan
| | - Jörn M Schattenberg
- Department of Internal Medicine I, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Rhineland-Palatinate, Germany
| | - Christian Labenz
- Department of Internal Medicine I, University Medical Centre of the Johannes Gutenberg-University Mainz, Mainz, Rhineland-Palatinate, Germany
| | - Won Kim
- Department of Gastroenterology and Hepatology, Department of Internal Medicine, Seoul National University College of Medicine, Seoul Metropolitan Government Boramae Medical Center, Seoul, South Korea
| | - Myoung Seok Lee
- Department of Radiology, Seoul National University Seoul Metropolitan Government Boramae Medical Center, Dongjak-gu, Seoul, The Republic of Korea
| | - Johannes Wiegand
- Department of Medicine II, Leipzig University Medical Center, Leipzig, Sachsen, Germany
| | - Thomas Karlas
- Department of Medicine II, Leipzig University Medical Center, Leipzig, Sachsen, Germany
| | - Yusuf Yılmaz
- Department of Gastroenterology, Marmara University School of Medicine, Istanbul, Turkey,Institute of Gastroenterology, Marmara University, Istanbul, Turkey
| | - Guruprasad Padur Aithal
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, Nottinghamshire, UK,Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK
| | - Naaventhan Palaniyappan
- NIHR Nottingham Biomedical Research Centre, University of Nottingham, Nottingham, Nottinghamshire, UK,Nottingham Digestive Diseases Centre, School of Medicine, University of Nottingham, Nottingham, UK
| | - Christophe Cassinotto
- Diagnostic and Interventional Radiology, University Hospital Centre Montpellier, Montpellier, Languedoc-Roussillon, France
| | - Sandeep Aggarwal
- Department of Surgical Disciplines, AIIMS, New Delhi, Delhi, India
| | - Harshit Garg
- Department of Surgical Disciplines, AIIMS, New Delhi, Delhi, India
| | - Geraldine J Ooi
- Department of Surgery, Monash University, Prahran, Victoria, Australia
| | - Atsushi Nakajima
- Department of Gastroenterology and Hepatology, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Masato Yoneda
- Department of Gastroenterology and Hepatology, Yokohama City University, Yokohama, Kanagawa, Japan
| | - Marianne Ziol
- Service d'Anatomie Pathologique et Centre de Ressources Biologiques, Hopital Jean Verdier, Paris, France
| | - Nathalie Barget
- Centre de Ressources Biologiques, Hopitaux Universitaires Paris-Seine-Saint-Denis, Bondy, Île-de-France, France
| | - Andreas Geier
- Division of Hepatology, University Hospital Wurzburg, Wurzburg, Bayern, Germany
| | - Theresa Tuthill
- Internal Medicine Research Unit, Pfizer Inc, Cambridge, Massachusetts, USA
| | - M. Julia Brosnan
- Internal Medicine Research Unit, Pfizer Inc, Cambridge, Massachusetts, USA
| | - Quentin Mark Anstee
- Translational and Clinical Research Institute, Faculty of Medicine, Newcastle University, Newcastle upon Tyne, Tyne and Wear, UK
| | - Stefan Neubauer
- Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Stephen A. Harrison
- Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK
| | - Patrick M Bossuyt
- Department of Epidemiology and Data Science, Amsterdam UMC, University of Amsterdam, Amsterdam, The Netherlands
| | - Michael Pavlides
- Cardiovascular Medicine, Radcliffe Department of Medicine, University of Oxford, Oxford, UK .,Translational Gastroenterology Unit, University of Oxford, Oxford, Oxfordshire, UK.,NIHR Oxford Biomedical Research Centre, Oxford University Hospitals NHS Foundation Trust and the University of Oxford, Oxford, UK
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Tabak F, Şirin G, Demir M, Aladağ M, Sümer Ş, Kurtaran B, Tosun S, Yamazhan T, Bozkurt İ, Gürbüz Y, Batırel A, Şenateş E, Kandemir FÖ, Topal F, Doğanay HL, Sezgin O, Mıstık R, Köse Ş, Yılmaz Y, İnan D, Köksal İ, Parlak E, Akdoğan M, Güner R. Demographic Characteristics and Transmission Risk Factors of Patients with Hepatitis C Virus in Turkey: The EPI-C, A Multicenter and Cross-sectional Trial. Egypt J Immunol 2021. [DOI: 10.4274/vhd.galenos.2021.2021-1-3] [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: 12/01/2022]
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Atak A, Göksel Z, Yılmaz Y. Changes in Major Phenolic Compounds of Seeds, Skins, and Pulps from Various Vitis spp. and the Effect of Powdery and Downy Mildew Diseases on Their Levels in Grape Leaves. Plants (Basel) 2021; 10:plants10122554. [PMID: 34961024 PMCID: PMC8703439 DOI: 10.3390/plants10122554] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 11/12/2021] [Accepted: 11/17/2021] [Indexed: 06/14/2023]
Abstract
The main purpose of this study is to determine the contents of 3 major phenolic compounds (gallic acid, catechin, and epicatechin) in 22 different grape cultivars/hybrids obtained from 2 different breeding programs. Additionally, changes in these phenolic components in the grape leaves of some resistant/tolerant species were determined in relation to powdery and downy mildew diseases in viticulture. The skin, pulp, and seeds of grape berries were analysed over two years, while changes in the phenolic contents of grape leaves were determined before and after these diseases for two years. The major phenolic contents of new hybrids/cultivars were compared with those of popular cultivars in different parts of the grapes, and significant differences in phenolic contents were found among hybrids/cultivars and different grape parts. Variations in the contents of phenolics in grape seeds, skins, and pulp were high, but seeds contained higher levels of these phenolics than pulp and skin. Analyses of the relationship between two viticultural diseases and phenolic changes in resistant/tolerant cultivars in relation with the susceptible "Italia" cultivar revealed that an increase in the content of the phenolic compounds was found after powdery mildew disease. Hybrids/cultivars with high phenolic contents are recommended to develop new superior cultivars, which are resistant to grape fungal diseases, in breeding programs.
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Affiliation(s)
- Arif Atak
- Department of Viticulture, Atatürk Horticultural Central Research Institute, Yalova 77102, Turkey
| | - Zekiye Göksel
- Department of Food Quality, Atatürk Horticultural Central Research Institute, Yalova 77102, Turkey;
| | - Yusuf Yılmaz
- Department of Food Engineering, Faculty of Engineering and Architecture, Burdur Mehmet Akif Ersoy University, Burdur 15030, Turkey;
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Çelik M, Kültürsay B, Küp A, Yılmaz Y, Karaduman A, Alıcı G. Endovascular treatment of renal artery pseudoaneurysm arising from previously implanted renal artery stent. Kardiol Pol 2021; 79:1391-1392. [PMID: 34734408 DOI: 10.33963/kp.a2021.0153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 11/03/2021] [Indexed: 11/23/2022]
Affiliation(s)
- Mehmet Çelik
- Department of Cardiology, Kartal Koşuyolu Education and Research Hospital, Istanbul, Turkey
| | - Barkın Kültürsay
- Department of Cardiology, Kartal Koşuyolu Education and Research Hospital, Istanbul, Turkey.
| | - Ayhan Küp
- Department of Cardiology, Kartal Koşuyolu Education and Research Hospital, Istanbul, Turkey
| | - Yusuf Yılmaz
- Department of Cardiology, Istanbul Medeniyet University Faculty of Medicine, Istanbul, Turkey
| | - Ahmet Karaduman
- Department of Cardiology, Kartal Koşuyolu Education and Research Hospital, Istanbul, Turkey
| | - Gökhan Alıcı
- Department of Cardiology, Kartal Koşuyolu Education and Research Hospital, Istanbul, Turkey
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Yılmaz Y. Preparation of a Phthalocyanine – Nanometal‐Coated Silica Microparticle Conjugate as Heterogeneous Photocatalyst and Investigation of Its Photocatalytic Activity. ChemistrySelect 2021. [DOI: 10.1002/slct.202102129] [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: 11/08/2022]
Affiliation(s)
- Yusuf Yılmaz
- Department of Chemistry NT Vocational School Gaziantep University 27310 Gaziantep Turkey
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Demirtas CÖ, Keklikkıran Ç, Mehdiyev S, Ergenç İ, Özen Alahdab Y, Gündüz F, Yılmaz Y, Atuğ Ö, Özdoğan OC. Recommendations for Reopening Endoscopy Units in Turkey: A Set-up Plan from a Tertiary Center in Istanbul. Turk J Gastroenterol 2021; 32:113-115. [PMID: 33960933 DOI: 10.5152/tjg.2021.20434] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the midst of Coronavirus-19 (COVID-19) pandemic, endoscopic procedures have been separated for only urgent and semi-urgent cases for the last few months to prevent transmission in endoscopy units. This approach will perhaps resolve the burden of elective procedures in the months ahead of us. As we observe a downtrend in new cases of COVID-19 in Turkey, a strategy for reopening endoscopy units is required. We are stepping into a time period where we should not only re-provide the essential services to our patients but also maintain the safety of healthcare workers and preserve the valuable personal protective equipment as well. Herein, we aim to share the available knowledge in performing endoscopy during the pandemic and the set-up plan of a tertiary center in Istanbul for reopening the endoscopy unit in the era of the COVID-19 pandemic.
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Affiliation(s)
- Coşkun Özer Demirtas
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Çağlayan Keklikkıran
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Shahin Mehdiyev
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - İlkay Ergenç
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Yeşim Özen Alahdab
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Feyza Gündüz
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Yusuf Yılmaz
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Özlen Atuğ
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
| | - Osman Cavit Özdoğan
- Department of Gastroenterology, Marmara University, School of Medicine, Istanbul, Turkey
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Gündüz F, Kani HT, Chang S, Akdeniz E, Eren F, Yılmaz Y, Alahdab YÖ. Effect of carbon dioxide versus room air insufflation on post-colonoscopic pain: A prospective, randomized, controlled study. Turk J Gastroenterol 2020; 31:676-680. [PMID: 33169704 DOI: 10.5152/tjg.2020.20596] [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] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
BACKGROUND/AIMS Room air (RA) and carbon dioxide (CO2) are widely used to insufflate the colon to examine the mucosa in colonoscopy. Pain, discomfort, and bloating can be seen during and after colonoscopy secondary to bowel distention. This study aimed to investigate the effect of CO2 on post-procedure pain sensation (PPPS) in comparison with RA. MATERIALS AND METHODS Patients were randomly assigned to the RA and CO2 insufflation groups in a 1:1 ratio. The visual analog scale (VAS) was used to measure the pain before and after the colonoscopy. VAS score of 0 was accepted as the absence of pain and above 0 was accepted as the presence of pain. The primary outcome was to investigate the effect of CO2 insufflation on PPPS. Secondary outcomes were to investigate the other contributing factors affecting PPPS and the effect of CO2 on PPPS in patients with inflammatory bowel disease (IBD). RESULTS A total of 204 patients were enrolled in the study. No significant difference in PPPS was seen between the 2 groups at any point in time after the colonoscopy. Furthermore, there was no significant difference in pain sensation between the CO2 and RA groups in patients with IBD. When we investigated the other contributing factors to pain sensation, body-mass index (BMI) was found to be significant at 30 minutes and BMI and colonoscopy time were found to be significant at 6 hours afterwards. CONCLUSION We found no favorable effect of CO2 insufflation on PPPS in colonoscopy, including in patients with IBD.
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Affiliation(s)
- Feyza Gündüz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Marmara University, Institute of Gastroenterology, İstanbul, Turkey
| | - Haluk Tarık Kani
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Shannon Chang
- Division of Gastroenterology, Inflammatory Bowel Disease Center, New York University Langone Health, New York, New York
| | - Esra Akdeniz
- Department of Medical Education, Marmara University, School of Medicine, İstanbul, Turkey
| | - Fatih Eren
- Marmara University Institute of Gastroenterology, İstanbul, Turkey; Department of Medical Biology, Marmara University School of Medicine, İstanbul, Turkey
| | - Yusuf Yılmaz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Marmara University, Institute of Gastroenterology, İstanbul, Turkey
| | - Yeşim Özen Alahdab
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Marmara University, Institute of Gastroenterology, İstanbul, Turkey
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Kahyaoglu M, Karaduman A, Geçmen Ç, Candan Ö, Güner A, Cakmak EO, Bayam E, Yılmaz Y, Çelik M, Izgi IA, Kirma C. Serum lactate level may predict the development of acute kidney injury in acute decompensated heart failure. Turk Kardiyol Dern Ars 2020; 48:683-689. [PMID: 33034575 DOI: 10.5543/tkda.2020.25679] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Abstract
OBJECTIVE Acute decompensated heart failure (ADHF) is a life-threatening medical condition and more than 30% of patients hospitalized for ADHF develop acute kidney injury (AKI), which increases the rate of both mortality and morbidity. Previous research has indicated that several biomar- kers may help to predict the development of AKI. The aim of this study was to investigate the relationship between lactate level at the time of admission and AKI in ADHF patients. METHODS A total of 154 consecutive ADHF patients were prospectively enrolled from June 2018 to December 2018, and after applying the exclusion criteria, a total of 91 patients were included in the study. The patients were divided into 2 groups: those with and without AKI. RESULTS There were 63 patients in the group without AKI and 28 patients in the group with AKI. The AKI group had a higher percentage of a history of chronic kidney disease (CKD), a higher creatinine level, lower glomerular filtration rate level, lower bicarbonate level, higher lactate level, and a lower left ventricular ejection fraction compared with the non-AKI group (p<0.05 for all parameters). Multiple logistic regression analysis determined that CKD history (odds ratio [OR]: 4.003, 95% confidence interval [CI]: 1.295-12.371; p=0.016) and lactate level (OR: 1.545, 95% CI: 1.222-1.954; p<0.001) were independent predictive parameters for developing AKI. CONCLUSION An elevated lactate level may help to make an early diagnosis of AKI, an important concern in ADHF.
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Affiliation(s)
- Muzaffer Kahyaoglu
- Department of Cardiology, Gaziantep Abdülkadir Yüksel State Hospital, Gaziantep, Turkey
| | - Ahmet Karaduman
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
| | - Çetin Geçmen
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
| | - Özkan Candan
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
| | - Ahmet Güner
- Department of Cardiology, Mehmet Akif Ersoy Thoracic and Cardiovascular Surgery Center, Training and Research Hospital, İstanbul, Turkey
| | - Ender Ozgün Cakmak
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
| | - Emrah Bayam
- Department of Cardiology, Ümraniye Training and Research Hospital, İstanbul, Turkey
| | - Yusuf Yılmaz
- Department of Cardiology, Amasya Merzifon State Hospital, Amasya, Turkey
| | - Mehmet Çelik
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
| | - Ibrahim Akin Izgi
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
| | - Cevat Kirma
- Department of Cardiology, Kartal Koşuyolu Yüksek İhtisas Training and Research Hospital, İstanbul, Turkey
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Aciksari G, Uygun T, Atici A, Aciksari K, Toprak AE, Onur I, Yılmaz Y, Cekin ME, Yalçınkaya E, Aydin E, Caliskan M. Association between galectin-3 levels and isolated coronary artery ectasia. Cardiovasc J Afr 2020; 31:147-152. [DOI: 10.5830/cvja-2019-070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Accepted: 12/02/2019] [Indexed: 11/06/2022] Open
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Abstract
Non-alcoholic fatty liver disease (NAFLD) is histologically classified as either non-alcoholic fatty liver or non-alcoholic steatohepatitis (NASH). NASH is the progressive subtype of NAFLD. Individuals with NASH are at significant risk of developing hepatic fibrosis, cirrhosis, hepatocellular carcinoma, and liver-related and all-cause mortality. NAFLD is closely associated with obesity, type 2 diabetes mellitus (T2DM), metabolic syndrome, and cardiovascular events. Its prevalence is estimated to be above 30% in Turkey; and recent studies confirm this estimate. According to these studies, the prevalence of NAFLD in Turkey is between 48.3% and 60.1%. Currently, Turkey can be considered a risky region in terms of NAFLD burden as it is the most obese country in Europe with an obesity prevalence of 32.1% according to the 2016 World Health Organization data. Moreover, along with the increasing prevalence of obesity and T2DM in Turkey, the burden of NAFLD is estimated to increase in the upcoming decade. Despite the growing burden, we lack well-designed systemic studies that investigate NAFLD and its marked histological severity. In this review, we present studies on the burden of NAFLD and NASH, the natural history of NAFLD, and its association with other systemic diseases conducted with Turkish populations.
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Affiliation(s)
- Eda Kaya
- İstanbul University-Cerrahpaşa, Cerrahpaşa School of Medicine, İstanbul, Turkey
| | - Yusuf Yılmaz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey; Marmara University Institute of Gastroenterology, İstanbul, Turkey
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Yılmaz Y, Kanı HT, Demirtaş CÖ, Kaya E, Sapmaz AF, Qutranji L, Alkayyali T, Batun KD, Batman M, Toy B, Çiftaslan A. Growing burden of nonalcoholic fatty liver disease in Turkey: A single-center experience. Turk J Gastroenterol 2020; 30:892-898. [PMID: 31258138 DOI: 10.5152/tjg.2019.19072] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
BACKGROUND/AIMS Nonalcoholic fatty liver disease (NAFLD), which consists of nonalcoholic fatty liver (NAFL) and nonalcoholic steatohepatitis (NASH), is a growing epidemic in Turkey, considering the recent alarming prevalence of 48.3%. Patients with NASH and/or liver fibrosis are more likely to progress to advanced liver disease. In this single-center study, we sought to describe the clinical and histological characteristics of a sample of Turkish patients with biopsy-proven NAFLD, who were enrolled over a 4-year period. MATERIALS AND METHODS This is a retrospective analysis of prospectively collected data from a total of 468 patients (224 males, 244 females; median age, 47 [18-71]. The study cohort consisted of patients with biopsy-proven NAFLD who were followed up at our outpatient clinic from 2009 to 2010 and from 2017 to 2018. Histological classification of the biopsies was performed according to the Steatosis, Activity and Fibrosis (SAF) scoring allowing the use of Fatty Liver Inhibition of Progression (FLIP) algorithm and the NAFLD Activity Score (NAS) scoring system. RESULTS Based on the SAF scoring, most patients (90.4%) had biopsy-proven NASH, whereas the NAFL was much rarer (9.6%). The prevalence of significant fibrosis (≥F2), advanced fibrosis (≥F3), and cirrhosis (F=4) was 35.0%, 17.5%, and 3.8%, respectively. The percentage of lean, overweight, and obese patients with NAFLD was 6.4%, 32.6%, and 61%, respectively. Metabolic syndrome was prevalent in 63% of the patients and Type 2 diabetes mellitus in 33.5%. CONCLUSION The growing burden of NAFLD as a public health problem in Turkey is underscored by its marked histological severity in terms of NASH and fibrosis. Well-conducted clinical trials will be essential for slowing down the NASH progression.
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Affiliation(s)
- Yusuf Yılmaz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Haluk Tarık Kanı
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Coşkun Özer Demirtaş
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Eda Kaya
- İstanbul University-Cerrahpaşa, Cerrahpaşa School of Medicine, İstanbul, Turkey
| | | | | | | | | | - Mahmut Batman
- Marmara University School of Medicine, İstanbul, Turkey
| | - Berk Toy
- Marmara University School of Medicine, İstanbul, Turkey
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Kesen O, Kani HT, Yanartaş Ö, Aykut UE, Gök B, Gündüz F, Yılmaz Y, Özdoğan OC, Özen Alahdab Y. Evaluation of depression, anxiety and quality of life in hepatitis C patients who treated with direct acting antiviral agents. Turk J Gastroenterol 2020; 30:801-806. [PMID: 31530524 DOI: 10.5152/tjg.2019.18679] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
BACKGROUND/AIMS Hepatitis C virus (HCV) infection is known to impair the quality of life (QoL). Increased levels of anxiety and depression have been found in HCV infection with a prevalence of 28% and 33%, respectively. Our aim was to investigate depression, anxiety, and QoL of chronic hepatitis C (CHC) patients before and after treatment with a direct-acting antiviral agent (DAAA). MATERIALS AND METHODS In this study, enrolled CHC patients who had undergone DAAA treatment in our out-patient clinic. We administered the Hospital Anxiety and Depression (HAD) questionnaire to measure the severity of the anxiety and depression symptoms and the Short Form-36 (SF-36) questionnaire to measure the QoL at the beginning and at the end of the treatment. RESULTS Pretreatment anxiety and depression scores showed a statistically significant difference from the post treatment scores (p=0.000 and p=0.029 respectively). When we compared the SF-36 subitems before and after the treatment, a statistical significance was found in physical functioning (p=0.026), physical role limitation (p=0.009), bodily pain (p=0.011), general health (p=0.017), social functioning (p=0.006), and emotional role limitation (p=0.007). Also, an improvement was seen in the vitality (p=0.488) and mental health (p=0.714), which was not statistically significant. CONCLUSION Depression got minimally worse in the male group despite an improvement in CHC. Anxiety scores were improved with treatment in the cirrhotic and non-cirrhotic groups significantly. A decrease in anticipatory anxiety may be related to the high treatment success with DAAA. Nearly all the subitems of the QoL scores were improved after treatment and these were more common in the female group. Elimination of HCV may itself decrease the number of patients who need psychiatric treatment.
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Affiliation(s)
- Oğuzhan Kesen
- Department of Internal Medicine, Marmara University School of Medicine, İstanbul, Turkey
| | - Haluk Tarık Kani
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Ömer Yanartaş
- Department of Psychiatry, Marmara University School of Medicine, İstanbul, Turkey
| | - Umut Emre Aykut
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Bedin Gök
- Department of Internal Medicine, Marmara University School of Medicine, İstanbul, Turkey
| | - Feyza Gündüz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Yusuf Yılmaz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Osman Cavit Özdoğan
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
| | - Yeşim Özen Alahdab
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey
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Tatar B, Köse Ş, Ergun NC, Turken M, Onlen Y, Yılmaz Y, Akhan S. Response to direct-acting antiviral agents in chronic hepatitis C patients with end-stage renal disease: a clinical experience. ACTA ACUST UNITED AC 2020; 65:1470-1475. [PMID: 31994628 DOI: 10.1590/1806-9282.65.12.1470] [Citation(s) in RCA: 2] [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: 06/17/2019] [Accepted: 07/29/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE The recent development of direct-acting antiviral agents (DAAs) has dramatically changed the treatment of chronic hepatitis C, and interferon-based regimes have become a poor treatment choice in clinical practice. Today DAAs offer shorter, well-tolerated, highly effective curative therapies. This study aimed to evaluate the effectiveness and safety of DAAs in patients with end-stage renal disease and HCV genotype 1 infection in real clinical practice. METHODS Thirty-six patients who attended our clinic, were diagnosed with chronic hepatitis C (CHC), undergoing hemodialysis, and fulfilled the criteria of age >18 years, genotype 1 infection, with a detectable HCV RNA level were considered for the study. Patients with GT1a infection received OBV/PTV/r plus DSV plus RBV for 12 weeks; GT1b infected patients received this regimen without RBV for 12 weeks. RESULTS The study was conducted on 33 patients. The mean age was 52.30 ±13.77 years, and 70 % of them were male. By the fourth week of treatment, HCV RNA levels decreased below 15 IU/ml in all patients. Sustained virologic response (SVR) 12 rate was 100%. Nine patients had side effects during treatment. Of the patients with side effects, 89.9% were in group 1a and 11.1% in group 1b. CONCLUSION In this study, treatment with OBV/PTV/r and DSV with or without RBV resulted in high rates of sustained virologic response in HCV GT1-infected patients with end-stage renal disease (ESRD). SVR was achieved in all patients with few side effects.
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Affiliation(s)
- Bengu Tatar
- . Turkiye Cumhuriyeti Saglik Bakanlıgı, Izmir Tepecik Egitim ve Arastirma Hastanesi, Infectious Diseases and Clinical Microbiology, Izmır, Turkey
| | - Şükran Köse
- . Turkiye Cumhuriyeti Saglik Bakanlıgı, Izmir Tepecik Egitim ve Arastirma Hastanesi, Infectious Diseases and Clinical Microbiology, Izmır, Turkey
| | - Nadide Colak Ergun
- . Turkiye Cumhuriyeti Saglik Bakanlıgı, Izmir Tepecik Egitim ve Arastirma Hastanesi, Infectious Diseases and Clinical Microbiology, Izmır, Turkey
| | - Melda Turken
- . Turkiye Cumhuriyeti Saglik Bakanlıgı, Izmir Tepecik Egitim ve Arastirma Hastanesi, Infectious Diseases and Clinical Microbiology, Izmır, Turkey
| | - Yusuf Onlen
- . Mustafa Kemal Universitesi, Infectious Diseases and Clinical Microbiology, Hatay, Turkey
| | - Yusuf Yılmaz
- . Marmara Universitesi, Gastroenterology, Istanbul, Turkey
| | - Sıla Akhan
- . Kocaeli Universitesi, Infectious Diseases and Clinical Microbiology, Kocaeli, Turkey
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Demir M, Deyneli O, Yılmaz Y. Screening for hepatic fibrosis and steatosis in Turkish patients with type 2 diabetes mellitus: A transient elastography study. Turk J Gastroenterol 2019; 30:266-270. [PMID: 30411703 DOI: 10.5152/tjg.2018.18559] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
BACKGROUND/AIMS Non-alcoholic fatty liver disease is highly prevalent in patients with type 2 diabetes mellitus (T2DM). The aim of the present study was to investigate the potential usefulness of transient elastography (TE), which is a technique that allows measuring both fibrosis and liver fat content simultaneously, as a screening tool for hepatic involvement in Turkish patients with T2DM. MATERIALS AND METHODS We obtained liver stiffness measurements (LSMs, as a measure of fibrosis) and controlled attenuation parameter (CAP, as a marker of steatosis) in 124 (46 males and 78 females; mean body mass index (BMI): 33.2±6.6 kg/m2) Turkish patients with T2DM. The prevalence rates of overweight, obesity, and metabolic syndrome in our sample were 28.2%, 64.5%, and 77.4%, respectively. Probe-specific LSM cut-off values were used to define advanced fibrosis (>F3) and cirrhosis (F4) (M probe: F3=9.6-11.4 kPa, F4 >11.5 kPa and XL probe: F3=9.3-10.9 kPa, F4 >11.0 kPa). Mild, moderate, and severe steatosis were defined as CAP 222-232 dB/m, CAP 233-289 dB/m, and CAP >290 dB/m, respectively. RESULTS Advanced fibrosis and cirrhosis were identified in 21 (16.9%) and 10 (8.0%) patients, respectively. TE-defined hepatic steatosis (CAP>222 dB/m) was detected in 117 (94.3%) patients. Mild, moderate, and severe steatosis were identified in 0, 29, and 88 patients, respectively. CONCLUSION TE is a useful non-invasive imaging modality to screen for liver involvement in Turkish patients with T2DM. High rates of TE-defined fibrosis and steatosis in our sample reflect the presence of an elevated mean BMI.
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Affiliation(s)
- Meryem Demir
- Department of Internal Medicine, Marmara University School of Medicine, İstanbul, Turkey
| | - Oğuzhan Deyneli
- Department of Endocrinology and Metabolism, Marmara University School of Medicine, İstanbul, Turkey;Department of Endocrinology and Metabolism, Koç University School of Medicine, İstanbul, Turkey
| | - Yusuf Yılmaz
- Department of Gastroenterology, Marmara University School of Medicine, İstanbul, Turkey;Institute of Gastroenterology, Marmara University, İstanbul, Turkey
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Bayam E, Yıldırım E, Kalçık M, Karaduman A, Kalkan S, Güner A, Küp A, Kahyaoğlu M, Yılmaz Y, Selcuk M, Uyan C. Relationship between P wave peak time and coronary artery disease severity in non-ST elevation acute coronary syndrome. Herz 2019; 46:188-194. [PMID: 31578616 DOI: 10.1007/s00059-019-04859-1] [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: 05/30/2019] [Revised: 08/01/2019] [Accepted: 08/20/2019] [Indexed: 11/28/2022]
Abstract
BACKGROUND Early diagnosis of non-ST elevation acute coronary syndrome (NSTE-ACS) and prediction of the severity of current coronary artery disease (CAD) play a major role in patient prognosis. Electrocardiography has a unique value in the diagnosis and provides prognostic information on patients with NSTE-ACS. In the present study, we aimed to examine the relationship between P wave peak time (PWPT) and the severity of CAD in patients with NSTE-ACS. METHODS A total of 132 consecutive patients (female: 35.6%; mean age: 60.1 ± 11.6 years) who were diagnosed with NSTE-ACS were evaluated retrospectively. Gensini scores (GSs) were used to define the angiographic characteristics of the coronary atherosclerotic lesions. The patients were divided into two groups according to the GS. The PWPT was defined as the duration between the beginning and the peak of the P wave, and R wave peak time (RWPT) was defined as the duration between the beginning of the QRS complex and the peak of the R wave. RESULTS There were 59 (44.6%) patients in the high-GS group (GS ≥25 ) and 73 (55.3%) patients in the low-GS group (GS <25 ). Presence of diabetes mellitus, low left ventricular ejection fraction, and high RWPT and PWPT were identified as predictors of a high GS in the study population. There was no significant difference between the area under the curves of PWPT and RWPT for predicting the severity of CAD (0.663 vs. 0.623, respectively; p = 0.573). CONCLUSION The present study found that both PWPT and RWPT on admission electrocardiography were associated with the severity and complexity of CAD in patients with NSTE-ACS.
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Affiliation(s)
- Emrah Bayam
- Depertament of Cardiology, Umraniye Training and Research Hospital, University of Medical Sciences, Umraniye, Turkey
| | - Ersin Yıldırım
- Depertament of Cardiology, Umraniye Training and Research Hospital, University of Medical Sciences, Umraniye, Turkey
| | - Macit Kalçık
- Depertament of Cardiology, Faculty of Medicine, Hitit University, Buharaevler Mah. Buhara 25. Sok. No. 1 /A Daire: 22, Çorum, Turkey.
| | - Ahmet Karaduman
- Depertament of Cardiology, Kartal Kosuyolu High Specialty Training and Research Hospital, University of Medical Sciences, Kartal, Turkey
| | - Semih Kalkan
- Depertament of Cardiology, Kartal Kosuyolu High Specialty Training and Research Hospital, University of Medical Sciences, Kartal, Turkey
| | - Ahmet Güner
- Depertament of Cardiology, Kartal Kosuyolu High Specialty Training and Research Hospital, University of Medical Sciences, Kartal, Turkey
| | - Ayhan Küp
- Depertament of Cardiology, Kartal Kosuyolu High Specialty Training and Research Hospital, University of Medical Sciences, Kartal, Turkey
| | - Muzaffer Kahyaoğlu
- Depertament of Cardiology, Umraniye Training and Research Hospital, University of Medical Sciences, Umraniye, Turkey
| | - Yusuf Yılmaz
- Depertament of Cardiology, Umraniye Training and Research Hospital, University of Medical Sciences, Umraniye, Turkey
| | - Murat Selcuk
- Depertament of Cardiology, Umraniye Training and Research Hospital, University of Medical Sciences, Umraniye, Turkey
| | - Cihangir Uyan
- Depertament of Cardiology, Umraniye Training and Research Hospital, University of Medical Sciences, Umraniye, Turkey
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Berkdemir Çalışkan Z, Telci Caklili O, Yılmaz Y, Çalışkan M. Association Between Atherosclerosis and Monocyte/High Density Lipoprotein Ratio in Patients with Familial Mediterranean Fever. Medeni Med J 2019. [DOI: 10.5222/mmj.2019.85226] [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: 11/05/2022] Open
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Abstract
BACKGROUND Professionalism education is one of the major elements of surgical residency education. AIMS To evaluate the studies on core professionalism education programs in surgical professionalism education. STUDY DESIGN Systematic review. METHODS This systematic literature review was performed to analyze core professionalism programs for surgical residency education published in English with at least three of the following features: program developmental model/instructional design method, aims and competencies, methods of teaching, methods of assessment, and program evaluation model or method. A total of 27083 articles were retrieved using EBSCOHOST, PubMed, Science Direct, Web of Science, and manual search. RESULTS Eight articles met the selection criteria. The instructional design method was presented in only one article, which described the Analysis, Design, Development, Implementation, and Evaluation model. Six articles were based on the Accreditation Council for Graduate Medical Education criterion, although there was significant variability in content. The most common teaching method was role modeling with scenario- and case-based learning. A wide range of assessment methods for evaluating professionalism education were reported. The Kirkpatrick model was reported in one article as a method for program evaluation. CONCLUSION It is suggested that for a core surgical professionalism education program, developmental/instructional design model, aims and competencies, content, teaching methods, assessment methods, and program evaluation methods/models should be well defined, and the content should be comparable.
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Affiliation(s)
- Akile Sarıoğlu Büke
- Emeritus Professor of Paediatric Surgery, Pamukkale University School of Medicine, Denizli, Turkey
| | | | - Yusuf Yılmaz
- Department of Medical Education, Ege University School of Medicine, İzmir, Turkey
| | - İskender Sayek
- Emeritus Professor of Surgery, Hacettepe University School of Medicine, Ankara, Turkey
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Kaymakoğlu S, Köksal İ, Tabak F, Akarca US, Akbulut A, Akyüz F, Bodur H, Çağatay A, Dinçer D, Esen Ş, Güner R, Gürel S, Köse Ş, Şentürk Ö, Şimşek H, Yamazhan T, Yılmaz Y, Idilman R, Guidelines Study Group VH. Recommendation for treatment of hepatitis C virus infection. Turk J Gastroenterol 2018; 28:94-100. [PMID: 29303106 DOI: 10.5152/tjg.2017.22] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Sabahattin Kaymakoğlu
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - İftihar Köksal
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Fehmi Tabak
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Ulus S Akarca
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Ayhan Akbulut
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Filiz Akyüz
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Hürrem Bodur
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Atahan Çağatay
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Dinç Dinçer
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Şaban Esen
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Rahmet Güner
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Selim Gürel
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Şükran Köse
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Ömer Şentürk
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Halis Şimşek
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Tansu Yamazhan
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Yusuf Yılmaz
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
| | - Ramazan Idilman
- Turkish Association for the Study of the Liver, İstanbul, Turkey; Viral Hepatitis Society, Ankara, Turkey
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Ertan K, Bayana D, Gökçe Ö, Alatossava T, Yılmaz Y, Gürsoy O. Türkiye’de Satışa Sunulan UHT ve Pastörize İnek Sütü Örneklerinin Toplam Antioksidan Kapasitesi ve Fenolik Madde İçeriği. ACTA ACUST UNITED AC 2017. [DOI: 10.24323/akademik-gida.333630] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Açıksarı G, Uygun T, Atici A, Aciksari K, Toprak AE, Onur I, Yılmaz Y, Cekin ME, Yalçınkaya E, Caliskan M. OP-207 [AJC » Miscellaneous] Serum Concentrations of Galectin-3 in Patients with Coronary Artery Ectasia. Am J Cardiol 2017. [DOI: 10.1016/j.amjcard.2017.03.099] [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: 10/19/2022]
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28
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Keleş N, Aksu F, Açıksarı G, Demircioğlu K, Yılmaz Y, Köstek O, Çetin ME, Kalçık M, Kul Ş, Çalışkan M. Echocardiographic Epicardial Fat Thickness Measurement and Cardiovascular Risk Assessment in Patients with Systemic Lupus Erythematosus. Medeni Med J 2016. [DOI: 10.5222/mmj.2016.1003] [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: 11/05/2022] Open
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Keleş N, Aksu F, Yılmaz Y, Demircioğlu K, Çalışkan M. Current Approaches to the Diagnosis and Treatment of Resistant Hypertension. Medeni Med J 2016. [DOI: 10.5222/mmj.2016.213] [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: 11/05/2022] Open
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Yılmaz Y, Taken K, Atar M, Ergün M, Söylemez H. Protective effect of curcumin on priapism and ischemia-reperfusion injury in rats. Eur Rev Med Pharmacol Sci 2015; 19:4664-4670. [PMID: 26698266] [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: 06/05/2023]
Abstract
OBJECTIVE We aimed to identify the oxidative stress effects of the ischemic priapism on cavernosal tissues and to assess the biochemical and histopathological effects of curcumin in rats. MATERIALS AND METHODS 26 adult male Sprague Dawley rats were randomly divided into three groups. Group 1 (Control, n = 8): only penectomy was performed and 3 ml blood samples were obtained from the vena cava inferior (VCI). Group 2 (ischemia-reperfusion group; n= 8): penectomy was performed after 1 hour ischemic priapism + 30 min reperfusion and 3 ml blood samples were obtained from the VCI. Group III (IR + CURC group, n = 10): 200 mg/kg/day curcumin per orally before surgery for 7 days + penectomy after 1 hour ischemic priapism + 30 min reperfusion and 3 ml blood samples from the VCI. Total oxidant status (TAS), total antioxidant status (TAS) and paraoxonase (PON1) levels were measured. Tissue samples were investigated and scored histopathologically in terms of bleeding, edema and necrosis. RESULTS TOS levels were higher (p = 0.002), and TAS levels were lower (p = 0.001) in the IR group compared to the control group. As a result of curcumin treatment, TAS levels were increased (p = 0.003), and TOS levels were decreased (p = 0.004) in the IR + CURC group compared to the IR group. In the treatment group (IR + CURC) TAS and TOS levels were similar to levels in the control group. PON1 levels were increased with ischemia-reperfusion (p = 0.21) and decreased with curcumin treatment (p = 0.53), however these changes were not statistically significant. There was no significant difference in the effects of curcumin on histopathological changes. CONCLUSIONS This study showed that curcumin has preventive effects on oxidative stress parameters against ischemia-reperfusion injury.
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Affiliation(s)
- Y Yılmaz
- Department of Urology, Faculty of Medicine, Dicle University, Diyarbakır, Turkey.
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Yonal O, Eren F, Yılmaz Y, Atuğ Ö, Över HH. No association between the functional cannabinoid receptor type 2 Q63R variants and inflammatory bowel disease in Turkish subjects. Turk J Gastroenterol 2015; 25:639-43. [PMID: 25599774 DOI: 10.5152/tjg.2014.6568] [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] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
BACKGROUND/AIMS The endocannabinoid system can exert beneficial effects on gastrointestinal inflammation, and cannabinoid receptor-2 (CB2) agonists may represent a new therapeutic approach in inflammatory bowel disease (IBD). A functional CB2 Q63R polymorphism (rs35761398) in the CNR2 gene has been shown to affect the immunomodulating properties of the CB2 receptor. We sought to investigate whether the functional CB2 Q63R polymorphism (rs35761398) is associated with IBD susceptibility in a Turkish clinical sample. MATERIALS AND METHODS A total of 202 IBD patients, comprising 101 Crohn's disease (CD) patients and 101 ulcerative colitis (UC) patients, and 101 healthy controls were included in the study. The CB2 Q63R polymorphism was genotyped using real-time PCR. RESULTS There were no significant differences in the genotype frequencies of the three study groups. The odds ratio of the minor Q allele for CD relative to the common R allele was not significant (OR =1.02, 95% CI =0.67-1.56, p=0.99). Similarly, the odds ratio of the minor Q allele for UC relative to the common R allele did not reach statistical significance (OR =1.10, 95% CI =0.72-1.68, p=0.75). Moreover, the genotype frequencies did not show any significant association with the disease extent in either CD (p= 0.71) or UC patients (p=0.59). CONCLUSION These pilot findings suggest that CB2 Q63R polymorphism does not play a major role in genetic susceptibility to IBD or in its disease phenotypes among Turkish subjects.
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Affiliation(s)
- Oya Yonal
- Department of Gastroenterology, Marmara University Faculty of Medicine, İstanbul, Turkey.
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Özdemir L, Yılmaz Y, Sönmez M, Akkurt M, Tahir MN. Synthesis and Crystal Structure of a New Phthalonitrile and Its Phthalocyanines Bearing Diamagnetic Metals. ACTA ACUST UNITED AC 2015. [DOI: 10.1080/15533174.2014.900790] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Levin Özdemir
- Department of Chemistry, Gaziantep University, Gaziantep, Turkey
| | - Yusuf Yılmaz
- Department of Chemistry, Gaziantep University, Gaziantep, Turkey
| | - Mehmet Sönmez
- Department of Chemistry, Gaziantep University, Gaziantep, Turkey
| | - Mehmet Akkurt
- Department of Physics, Erciyes University, Kayseri, Turkey
| | - M. Nawaz Tahir
- Department of Physics, University of Sargodha, Sargodha, Pakistan
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Yılmaz Y, Mack J, Şener MK, Sönmez M, Nyokong T. Synthesis, photophysicochemical properties and TD-DFT calculations of tetrakis(2-benzoyl-4-chlorophenoxy) phthalocyanines. J PORPHYR PHTHALOCYA 2014. [DOI: 10.1142/s1088424614500047] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The synthesis of metal free, magnesium and zinc tetrakis(2-benzoyl-4-chlorophenoxy) phthalocyanine derivatives (2–4) is described along with their characterization by elemental analysis, IR, UV-visible absorption, and 1 H NMR spectroscopy and mass spectrometry. Trends observed in the fluorescence, triplet state, singlet oxygen and photodegradation quantum yields and the triplet state lifetimes are also analyzed. The compounds exhibit high solubility in a wide range of organic solvents and no evidence of aggregation was observed over a wide concentration range. The Zn ( II ) complex (4) was found to have a very high singlet oxygen quantum yield (ΦΔ = 0.78) in dimethylsulfoxide (DMSO) and a reasonably large triplet state quantum yield (ΦT = 0.82). The photophysical and photochemical properties clearly demonstrate that these compounds could prove useful in singlet oxygen applications such as photodynamic therapy (PDT). DFT and TD-DFT calculations were used to assess the impact of the positional isomerism of the 2-benzoyl-4-chlorophenoxy substituents on the electronic structures and optical spectroscopy.
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Affiliation(s)
- Yusuf Yılmaz
- Department of Chemistry, Gaziantep University, Gaziantep 27310, Turkey
| | - John Mack
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
| | - M. Kasım Şener
- Department of Chemistry, Yıldız Technical University, Davutpaşa 34210, İstanbul, Turkey
| | - Mehmet Sönmez
- Department of Chemistry, Gaziantep University, Gaziantep 27310, Turkey
| | - Tebello Nyokong
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
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Yılmaz Y, Mack J, Sönmez M, Nyokong T. Photophysicochemical properties and TD-DFT calculations of a novel terminal alkyne substituted metal free phthalocyanine. J PORPHYR PHTHALOCYA 2014. [DOI: 10.1142/s1088424613501241] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
The synthesis of a novel free base tetrakis(prop-2-ynyloxy)phthalocyanine (2) is described, along with its characterization by IR, UV-visible absorption, and 1 H NMR spectroscopy and mass spectrometry. The compound exhibited good solubility in a wide range of organic solvents and no significant aggregation was observed over a wide concentration range. The values for the singlet oxygen (ΦΔ), photodegradation, fluorescence (ΦF) and triplet state quantum yields and the fluorescence and triplet state lifetimes are reported. A relatively high ΦΔ value of 0.46 was obtained in DMSO. The ability to carry out "click" chemistry at the ligand periphery enhances the potential utility of 2 for use in bioconjugates in photodynamic therapy (PDT). A moderately high ΦF value of 0.18 is observed for emission in the therapeutic window in the near-IR region, which suggests that it may also be possible to determine the level of localization of 2 in tumor cells through bioimaging.
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Affiliation(s)
- Yusuf Yılmaz
- Department of Chemistry, Gaziantep University, Gaziantep 27310, Turkey
| | - John Mack
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
| | - Mehmet Sönmez
- Department of Chemistry, Gaziantep University, Gaziantep 27310, Turkey
| | - Tebello Nyokong
- Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa
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Akdogan A, Kartal AA, Hol A, Yılmaz Y, Divrikli U, Elci L. Determination of Pesticides in Soil by Mechanical Stirring-Assisted Extraction Coupled with Gas Chromatography-Mass Spectrometry. ANAL LETT 2014. [DOI: 10.1080/00032719.2013.845901] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Ak Ş, Koruklu N, Yılmaz Y. A Study on Turkish Adolescent's Internet Use: Possible Predictors of Internet Addiction. Cyberpsychology, Behavior, and Social Networking 2013; 16:205-9. [DOI: 10.1089/cyber.2012.0255] [Citation(s) in RCA: 63] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Şerife Ak
- Department of Computer Education and Instructional Technology, Adnan Menderes University, Aydın, Turkey
| | - Nermin Koruklu
- Department of Psychological Counseling and Guidance, Faculty of Education, Adnan Menderes University, Aydın, Turkey
| | - Yusuf Yılmaz
- Department of Medical Education, Faculty of Medicine, Ege University, İzmir, Turkey
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Çelik İ, Yılmaz Y, Işık F, Üstün Ö. Effect of soapwort extract on physical and sensory properties of sponge cakes and rheological properties of sponge cake batters. Food Chem 2007. [DOI: 10.1016/j.foodchem.2006.02.063] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Yılmaz Y, Pekcan Ö. In situ fluorescence experiments to study swelling and slow release kinetics of disc-shaped poly(methyl methacrylate) gels made at various crosslinker densities. POLYMER 1998. [DOI: 10.1016/s0032-3861(97)10106-9] [Citation(s) in RCA: 50] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pekcan Ö, Yılmaz Y, Okay O. In situ fluorescence experiments to test the reliability of random bond and site bond percolation models during sol-gel transition in free-radical crosslinking copolymerization. POLYMER 1996. [DOI: 10.1016/0032-3861(96)85848-4] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Şengör AMC, Yılmaz Y, Sungurlu O. Tectonics of the Mediterranean Cimmerides: nature and evolution of the western termination of Palaeo-Tethys. ACTA ACUST UNITED AC 1984. [DOI: 10.1144/gsl.sp.1984.017.01.04] [Citation(s) in RCA: 172] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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