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Kayabekir M, Tuncer M. Effect of teeth clenching on handgrip force in adult men: role of periodontal mechanoreceptors. Acta Neurol Belg 2023; 123:1945-1956. [PMID: 37351827 DOI: 10.1007/s13760-023-02283-1] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Accepted: 05/05/2023] [Indexed: 06/24/2023]
Abstract
PURPOSE Voluntary teeth clenching is shown to increase the strength of muscle reflexes contributing to the improvement of postural stability. However, the interaction between the handgrip strength and teeth clenching is not yet understood. In this study, we aimed to evaluate the change in handgrip force in response to voluntary teeth clenching, and its relation to the peripheral receptors that play a central role in the control of mastication. METHODS Thirty-six healthy men were divided into two groups: aged 50-59 years, no dental prosthesis, and 53-62 years with total dental prosthesis. Each individual was given handgrip and teeth clenching instructions for five experiments: only handgrip, teeth clenching followed by handgrip without teeth clenching, teeth clenching followed by handgrip with teeth clenching, and the repetition of the last two instructions while wearing mouth guards. RESULTS Our findings showed that maximum handgrip force decreased and the resistance to fatigue increased in complete edentulous individuals using appropriate prostheses. Also, the significantly lower maximum handgrip force and higher resistance to fatigue values of the participants with dental prosthesis using a mouth guard while teeth clenching, revealed the central roles of periodontal mechanoreceptors. CONCLUSION Decreases in masticatory sensory information processes influence handgrip force values which is the most important indicator of motor function. The lack of periodontal mechanoreceptors associated with dental prosthesis usage may lead to a loss in muscle strength.
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Affiliation(s)
- Murat Kayabekir
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey.
- Department of Physiology, Medical School, Atatürk University, 25240, Erzurum, Turkey.
| | - Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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2
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Kubat GB, Bouhamida E, Ulger O, Turkel I, Pedriali G, Ramaccini D, Ekinci O, Ozerklig B, Atalay O, Patergnani S, Nur Sahin B, Morciano G, Tuncer M, Tremoli E, Pinton P. Mitochondrial dysfunction and skeletal muscle atrophy: Causes, mechanisms, and treatment strategies. Mitochondrion 2023; 72:33-58. [PMID: 37451353 DOI: 10.1016/j.mito.2023.07.003] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 01/27/2023] [Revised: 07/02/2023] [Accepted: 07/11/2023] [Indexed: 07/18/2023]
Abstract
Skeletal muscle, which accounts for approximately 40% of total body weight, is one of the most dynamic and plastic tissues in the human body and plays a vital role in movement, posture and force production. More than just a component of the locomotor system, skeletal muscle functions as an endocrine organ capable of producing and secreting hundreds of bioactive molecules. Therefore, maintaining healthy skeletal muscles is crucial for supporting overall body health. Various pathological conditions, such as prolonged immobilization, cachexia, aging, drug-induced toxicity, and cardiovascular diseases (CVDs), can disrupt the balance between muscle protein synthesis and degradation, leading to skeletal muscle atrophy. Mitochondrial dysfunction is a major contributing mechanism to skeletal muscle atrophy, as it plays crucial roles in various biological processes, including energy production, metabolic flexibility, maintenance of redox homeostasis, and regulation of apoptosis. In this review, we critically examine recent knowledge regarding the causes of muscle atrophy (disuse, cachexia, aging, etc.) and its contribution to CVDs. Additionally, we highlight the mitochondrial signaling pathways involvement to skeletal muscle atrophy, such as the ubiquitin-proteasome system, autophagy and mitophagy, mitochondrial fission-fusion, and mitochondrial biogenesis. Furthermore, we discuss current strategies, including exercise, mitochondria-targeted antioxidants, in vivo transfection of PGC-1α, and the potential use of mitochondrial transplantation as a possible therapeutic approach.
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Affiliation(s)
- Gokhan Burcin Kubat
- Department of Mitochondria and Cellular Research, Gulhane Health Sciences Institute, University of Health Sciences, 06010 Ankara, Turkey.
| | - Esmaa Bouhamida
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Oner Ulger
- Department of Mitochondria and Cellular Research, Gulhane Health Sciences Institute, University of Health Sciences, 06010 Ankara, Turkey
| | - Ibrahim Turkel
- Department of Exercise and Sport Sciences, Faculty of Sport Sciences, Hacettepe University, 06800 Ankara, Turkey
| | - Gaia Pedriali
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Daniela Ramaccini
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Ozgur Ekinci
- Department of Pathology, Gazi University, 06500 Ankara, Turkey
| | - Berkay Ozerklig
- Department of Exercise and Sport Sciences, Faculty of Sport Sciences, Hacettepe University, 06800 Ankara, Turkey
| | - Ozbeyen Atalay
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
| | - Simone Patergnani
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121 Ferrara, Italy
| | - Beyza Nur Sahin
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
| | - Giampaolo Morciano
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121 Ferrara, Italy
| | - Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06230 Ankara, Turkey
| | - Elena Tremoli
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy
| | - Paolo Pinton
- Translational Research Center, Maria Cecilia Hospital GVM Care & Research, 48033 Cotignola, Italy; Department of Medical Sciences, Laboratory for Technologies of Advanced Therapies (LTTA), University of Ferrara, 44121 Ferrara, Italy.
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3
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Abstract
Programmed cell death pathways play important roles in a wide variety of physiological processes. Although it has similarities with apoptosis pyroptosis is a different type of programmed cell death. Pyroptosis can be triggered by different molecules originating from the cells or their environment. Once a pyroptotic pathway is started, it is followed by different molecular steps, and, it ends with the disruption of cell membrane integrity and the onset of inflammatory processes. In addition to the role of pyroptosis in the host's innate immunity against pathogens, uncontrolled pyroptosis can lead to increased inflammation and lead various diseases. The contradictory role of pyroptosis-related molecular changes in the pathogenesis of cancer has attracted attention lately. Excessive or decreased expression of molecules involved in pyroptotic pathways is associated with various cancers. There are ongoing studies on the use of different treatment methods for cancer in combination with new therapies targeting pyroptosis. The potential beneficial effects or side-effect profiles of these protocols targeting pyroptosis still need to be investigated. This will provide us with more efficient and safer options to treat cancer. This review aims to overview the main pathways and mechanisms of pyroptosis and to discuss its role in cancer.
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Affiliation(s)
- Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06100, Sıhhiye-Ankara, Turkey.
| | - Simay Alcan
- Department of Physiology, Faculty of Medicine, Hacettepe University, 06100, Sıhhiye-Ankara, Turkey
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Turkel I, Ozerklig B, Yılmaz M, Ulger O, Kubat GB, Tuncer M. Mitochondrial transplantation as a possible therapeutic option for sarcopenia. J Mol Med (Berl) 2023:10.1007/s00109-023-02326-3. [PMID: 37209146 DOI: 10.1007/s00109-023-02326-3] [Citation(s) in RCA: 3] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 04/09/2023] [Accepted: 04/20/2023] [Indexed: 05/22/2023]
Abstract
With advancing age, the skeletal muscle phenotype is characterized by a progressive loss of mass, strength, and quality. This phenomenon, known as sarcopenia, has a negative impact on quality of life and increases the risk of morbidity and mortality in older adults. Accumulating evidence suggests that damaged and dysfunctional mitochondria play a critical role in the pathogenesis of sarcopenia. Lifestyle modifications, such as physical activity, exercise, and nutrition, as well as medical interventions with therapeutic agents, are effective in the management of sarcopenia and offer solutions to maintain and improve skeletal muscle health. Although a great deal of effort has been devoted to the identification of the best treatment option, these strategies are not sufficient to overcome sarcopenia. Recently, it has been reported that mitochondrial transplantation may be a possible therapeutic approach for the treatment of mitochondria-related pathological conditions such as ischemia, liver toxicity, kidney injury, cancer, and non-alcoholic fatty liver disease. Given the role of mitochondria in the function and metabolism of skeletal muscle, mitochondrial transplantation may be a possible option for the treatment of sarcopenia. In this review, we summarize the definition and characteristics of sarcopenia and molecular mechanisms associated with mitochondria that are known to contribute to sarcopenia. We also discuss mitochondrial transplantation as a possible option. Despite the progress made in the field of mitochondrial transplantation, further studies are needed to elucidate the role of mitochondrial transplantation in sarcopenia. KEY MESSAGES: Sarcopenia is the progressive loss of skeletal muscle mass, strength, and quality. Although the specific mechanisms that lead to sarcopenia are not fully understood, mitochondria have been identified as a key factor in the development of sarcopenia. Damaged and dysfunctional mitochondria initiate various cellular mediators and signaling pathways, which largely contribute to the age-related loss of skeletal muscle mass and strength. Mitochondrial transplantation has been reported to be a possible option for the treatment/prevention of several diseases. Mitochondrial transplantation may be a possible therapeutic option for improving skeletal muscle health and treating sarcopenia. Mitochondrial transplantation as a possible treatment option for sarcopenia.
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Affiliation(s)
- Ibrahim Turkel
- Department of Exercise and Sport Sciences, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
- Division of Sport Sciences and Technology, Institute of Health Sciences, Hacettepe University, Ankara, Turkey
| | - Berkay Ozerklig
- Department of Exercise and Sport Sciences, Faculty of Sport Sciences, Hacettepe University, Ankara, Turkey
- Division of Sport Sciences and Technology, Institute of Health Sciences, Hacettepe University, Ankara, Turkey
| | - Merve Yılmaz
- Department of Medical Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Oner Ulger
- Department of Mitochondria and Cellular Research, Health Sciences Institute, Health Sciences University, Ankara, Turkey
| | - Gokhan Burcin Kubat
- Division of Sport Sciences and Technology, Institute of Health Sciences, Hacettepe University, Ankara, Turkey.
- Department of Mitochondria and Cellular Research, Health Sciences Institute, Health Sciences University, Ankara, Turkey.
| | - Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Yılmaz MM, Akdere ÖE, Gümüşderelioğlu M, Kaynak Bayrak G, Koç S, Erdem A, Tuncer M, Atalay Ö, Take Kaplanoğlu G, Akarca Dizakar SÖ, Calis M. Biological nerve conduit model with de-epithelialized human amniotic membrane and adipose-derived mesenchymal stem cell sheet for repair of peripheral nerve defects. Cell Tissue Res 2023; 391:505-522. [PMID: 36562866 DOI: 10.1007/s00441-022-03732-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [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: 04/08/2022] [Accepted: 12/07/2022] [Indexed: 12/24/2022]
Abstract
In this study, a biological conduit, consisting of an adipocyte-derived mesenchymal stem cell (AdMSCs) sheet and amniotic membrane (AM), was designed for the reconstruction of peripheral nerve defects. To evaluate the effect of the produced conduit on neural regeneration, a 10-mm sciatic nerve defect was created in rats, and experiments were carried out on six groups, i.e., sham control group (SC), negative control group (NC), nerve autograft group (NG), the biological conduit (AdMSCs + AM) group, the commercial PGA tube conduit (PGA) group, and the conduit only consisting of AM (AM) group. The effects of different nerve repair methods on the peripheral nerve and gastrocnemius muscle were evaluated by functional, histological, and immunohistochemical tests. When the number of myelinated axons was compared between the groups of AdMSCs + AM and PGA, it was higher in the AdMSCs + AM group (p < 0.05). The percentage of gastrocnemius collagen bundle area of AdMSCs + AM group was found to be statistically lower than the PGA group (p < 0.05). The muscle fiber diameter of AdMSCs + AM group was lower than that of the NG group, but significantly higher than that of the PGA group and the AM group (p < 0.001). Muscle weight index was significantly higher in the AdMSCs + AM group compared to the PGA group (p < 0.05). It was observed that nerve regeneration was faster in the AdMSCs + AM group, and there was an earlier improvement in pin-prick score and sciatic functional index compared to the PGA group and the AM group. In conclusion, the biological conduit prepared from the AdMSCs sheet and AM is regarded as a new biological conduit that can be used as an alternative treatment method to nerve autograft in clinical applications.
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Affiliation(s)
- Mahmut Muhsin Yılmaz
- Department of Plastic Reconstructive and Aesthetic Surgery, Hacettepe University Faculty of Medicine, Hacettepe Universitesi Eriskin Hastanesi, Kat B, Plastik Cerrahi Anabilim Dali, 06100, Sihhiye - Ankara, Turkey
| | | | | | | | - Sena Koç
- Chemical Engineering Department, Hacettepe University, Ankara, Turkey
| | - Ayşen Erdem
- Department of Physiology, Hacettepe University, Ankara, Turkey
| | - Meltem Tuncer
- Department of Physiology, Hacettepe University, Ankara, Turkey
| | - Özbeyen Atalay
- Department of Physiology, Hacettepe University, Ankara, Turkey
| | | | | | - Mert Calis
- Department of Plastic Reconstructive and Aesthetic Surgery, Hacettepe University Faculty of Medicine, Hacettepe Universitesi Eriskin Hastanesi, Kat B, Plastik Cerrahi Anabilim Dali, 06100, Sihhiye - Ankara, Turkey.
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Bayraktar UA, Arıhan O, Atalay Ö, Gök M, Çiçek Ç, Bodur E, Tuncer M. Melatonin is effective in attenuating cisplatin-induced neurotoxicity. J Biochem Mol Toxicol 2022; 36:e23075. [PMID: 35451207 DOI: 10.1002/jbt.23075] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2021] [Revised: 02/24/2022] [Accepted: 04/01/2022] [Indexed: 11/08/2022]
Abstract
Cisplatin (Cis) is a chemotherapeutic agent that has many side effects. Neurotoxicity is one of the most important of these side effects. Oxidative stress and neuroinflammation are the best-known mechanisms in the pathogenesis of neurotoxicity development. In this study, we aimed to determine whether melatonin (Mel), with antioxidant and anti-inflammatory effects, is effective in preventing Cis-induced neurotoxicity. Forty-eight male Sprague-Dawley rats were divided into six groups (n = 8) as follows: control (0.9% NaCl), vehicle (5% ethanol), Cis (6 mg/kg), Cis (6 mg/kg) + vehicle (5% ethanol), Mel (20 mg/kg), and Cis (6 mg/kg) + Mel (20 mg/kg) groups. Cis was administered as a single dose on the 3rd day of the experiment while Mel was given for 5 days. All administrations were performed via intraperitoneal injection. After injections, T-maze, rotarod, and hot plate tests were performed to evaluate cognitive, motor, and sensory functions, respectively. Following sacrification oxidative stress markers, cholinergic function, and proinflammatory cytokines were studied from brain homogenates. Cis impaired cognitive function and motor performance in the Cis and Cis+Vehicle groups. The drug also increased oxidative stress in the brain. Mel significantly improved brain oxidant/antioxidant status and also decreased the overproduction of proinflammatory cytokines (superoxide dismutase activities in Cis+Vehicle and Cis+Mel groups: 104.55 ± 9.50 µU/mg protein vs. 150.13 ± 4.70 µU/mg protein, respectively, p < 0.05; tumor necrosis factor-α levels in Cis and Cis+Mel groups: 40 pg/ml vs. 20 pg/ml, respectively, p < 0.05). It seems that Mel can improve Cis neurotoxicity. For a more firm conclusion, further studies using Mel at different doses with larger groups should be performed.
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Affiliation(s)
- U Arda Bayraktar
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Okan Arıhan
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Özbeyen Atalay
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Müslüm Gök
- Department of Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey.,Department of Biochemistry, Faculty of Medicine, Muğla Sıtkı Koçman University, Muğla, Turkey
| | - Çiğdem Çiçek
- Department of Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey.,Department of Biochemistry, Faculty of Medicine, Yüksek İhtisas University, Ankara, Turkey
| | - Ebru Bodur
- Department of Biochemistry, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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7
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Tuncer M, Pehlivanoglu B, Sürücü SH, Isbir T. Melatonin Improves Reduced Activities of Membrane ATPases and Preserves Ultrastructure of Gray and White Matter in the Rat Brain Ischemia/Reperfusion Model. Biochemistry (Mosc) 2021; 86:540-550. [PMID: 33993861 DOI: 10.1134/s0006297921050035] [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] [Subscribe] [Scholar Register] [Received: 11/11/2020] [Revised: 03/22/2021] [Accepted: 03/28/2021] [Indexed: 06/12/2023]
Abstract
Ischemia/reperfusion (I/R) is among the most frequent neurological problems and early intervention to limit the damage is crucial in decreasing mortality and morbidity. Based on reports regarding beneficial effects of melatonin, we investigated its impact on Na+-K+/Mg2+ ATPase and Ca2+/Mg2+ ATPase activities and ultrastructure of gray and white matter in the rat forebrain I/R model. Adult Wistar-albino rats (n = 78), were randomized into control, ischemia (I), ischemia/reperfusion (I/R), low (I/R + melatonin 400 µg/kg), moderate (I/R + melatonin 1200 µg/kg), and high (I/R + melatonin 2400 µg/kg) dose melatonin. Two-vessel occlusion combined with hypotension (15 min) induced ischemia and reperfusion (75 min) achieved by blood reinfusion were performed. Activities of the membrane-bound enzyme, brain malondialdehyde levels, and brain matter ultrastructure were examined in frontoparietal cortices. Melatonin lowered production of malondialdehyde in a dose-dependently. The enzyme activities attenuated under I and I/R, improved with melatonin treatment. I and I/R severely disturbed gray and white matter morphology. Melatonin, in all applied doses, decreased ultrastructural damages in both gray and white matter. Favorable effects of melatonin can be attributed to its antioxidant properties suggesting that it could be a promising neuroprotective agent against I/R injury being effective both for gray and white matter due to favorable biological properties.
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Affiliation(s)
- Meltem Tuncer
- Department of Physiology, Hacettepe University Faculty of Medicine, Ankara, 06100, Turkey.
| | - Bilge Pehlivanoglu
- Department of Physiology, Hacettepe University Faculty of Medicine, Ankara, 06100, Turkey
| | - Selçuk H Sürücü
- Department of Anatomy, Koç University School of Medicine, Istanbul, 34450, Turkey
| | - Turgay Isbir
- Department of Medical Biology, Faculty of Medicine, Yeditepe University, Istanbul, 34755, Turkey
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Kalyoncu Ş, Yilmaz B, Demir M, Tuncer M, Bozdağ Z, Ince O, Bozdayi MA, Ulusal H, Taysi S. Melatonin attenuates ovarian ischemia reperfusion injury in rats by decreasing oxidative stress index and peroxynitrite. Turk J Med Sci 2020; 50:1513-1522. [PMID: 32927928 PMCID: PMC7605088 DOI: 10.3906/sag-2004-135] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2020] [Accepted: 09/08/2020] [Indexed: 12/17/2022] Open
Abstract
Background/aim To evaluate the protective effect of melatonin on ovarian ischemia reperfusion injury in a rat model. Materials and methods Forty-eight rats were separated equally into 6 groups. Group 1: sham; Group 2: surgical control with 3-h bilateral ovarian torsion and detorsion; Group 3: intraperitoneal 5% ethanol (1 mL) just after detorsion (as melatonin was dissolved in ethanol); Group 4: 10 mg/kg intraperitoneal melatonin 30 min before 3-h torsion; Group 5:10 mg/kg intraperitoneal melatonin just after detorsion; Group 6:10 mg/kg intraperitoneal melatonin 30 min before torsion and just after detorsion. Both ovaries and blood samples were obtained 7 days after detorsion for histopathological and biochemical analysis. Results In Group 1, serum levels of total oxidant status (TOS) (μmol H2O2 equivalent/g wet tissue)were significantly lower than in Group2 (P = 0.0023), while tissue TOS levels were lower than in Group 3 (P = 0.0030). Similarly, serum and tissue levels of peroxynitrite in Group 6were significantly lower than those ofGroup 2 (P = 0.0023 and P = 0.040, respectively). Moreover, serum oxidative stress index (OSI) (arbitrary unit) levels were significantly increased in Group 2 when compared to groups 1 and 6 (P = 0.0023 and P= 0.0016, respectively) and in Group 3 with respect to groups 1, 4, 5, and 6 (P = 0.0023, P = 0.0026, P = 0.0008, and P = 0.0011, respectively). Furthermore, there was a significant decrease in histopathological scores including follicular degeneration, vascular congestion, hemorrhage, and inflammation in the melatonin and sham groups in comparison with control groups. Additionally, primordial follicle count was significantly higher in Group 6 than in Group 2 (P = 0.0002). Conclusion Melatonin attenuates ischemia reperfusion damage in a rat torsion/detorsion model by improving histopathological and biochemical findings including OSI and peroxynitrite.
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Affiliation(s)
- Şenol Kalyoncu
- Department of Obstetrics and Gynecology, TOBB ETU University Hospital, Ankara, Turkey
| | - Bülent Yilmaz
- Department of Obstetrics and Gynecology, Faculty of Medicine, Recep Tayyip Erdoğan University, Rize, Turkey
| | - Mustafa Demir
- Department of Obstetrics and Gynecology, ANKA Hospital, Gaziantep, Turkey
| | - Meltem Tuncer
- Department of Physiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Zehra Bozdağ
- Department of Pathology, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Onur Ince
- Department of Obstetrics and Gynecology, Faculty of Medicine, Health Science University, Kütahya, Turkey
| | - Mehmet Akif Bozdayi
- Department of Biochemistry, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Hasan Ulusal
- Department of Biochemistry, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
| | - Seyithan Taysi
- Department of Biochemistry, Faculty of Medicine, Gaziantep University, Gaziantep, Turkey
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Kalyoncu S, Yilmaz B, Demir M, Tuncer M, Bozdag Z, Ince O, Akif Bozdayi M, Ulusal H, Taysi S. Octreotide and lanreotide decrease ovarian ischemia-reperfusion injury in rats by improving oxidative and nitrosative stress. J Obstet Gynaecol Res 2020; 46:2050-2058. [PMID: 32748523 DOI: 10.1111/jog.14379] [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: 04/01/2020] [Revised: 05/29/2020] [Accepted: 06/12/2020] [Indexed: 12/31/2022]
Abstract
AIM To investigate the protective effect of octreotide and lanreotide on ovarian damage in experimental ovarian ischemia-reperfusion injury. METHODS Fifty-six rats were separated into seven groups; group 1: sham group, group 2: surgical control group with 3-h torsion and detorsion, group 3: 0.02 mg/kg s.c. octreotide 30 min before 3-h torsion, group 4; octreotide just after detorsion for 7 days, group 5: octreotide 30 min before torsion and just after detorsion for 7 days, group 6: single time 20 mg/kg s.c. lanreotide before torsion, group 7: single time lanreotide just after detorsion. RESULTS All histopathological scores except congestion were significantly lower in group 1 than other groups. In addition, hemorrhage (group 2 vs 4: P < 0.05), degeneration (group 2 vs 4: P < 0.05, group 2 vs 5: P < 0.01 and group 2 vs 6: P < 0.05) and total damage score (group 2 vs 4: P < 0.05, group 2 vs 5: P < 0.05, group 2 vs 6: P < 0.05 and group 2 vs 7: P < 0.05) were significantly lower than other groups. Moreover, ovarian tissue total oxidant status and oxidative stress index levels were significantly decreased in groups 5 (both P < 0.05) and 7 (both P < 0.05) when compared to group 2. Furthermore, tissue levels of peroxynitrite were significantly higher in group 2 than groups 1, 3 and 5 (all P < 0.05). CONCLUSIONS Octreotide and lanreotide have a protective role against ischemia-reperfusion damage in rat torsion detorsion model by improving histopathological and biochemical findings including tissue levels of total oxidant status, oxidative stress index and peroxynitrite.
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Affiliation(s)
- Senol Kalyoncu
- Obstetrics and Gynecology Clinic, TOBB ETU University Hospital, Ankara, Turkey
| | - Bulent Yilmaz
- Department of Obstetrics and Gynecology, Recep Tayyip Erdogan University, Faculty of Medicine, Rize, Turkey
| | - Mustafa Demir
- Obstetrics and Gynecology Clinic, ANKA Hospital, Gaziantep, Turkey
| | - Meltem Tuncer
- Department of Physiology, Hacettepe University, Faculty of Medicine, Ankara, Turkey
| | - Zehra Bozdag
- Department of Pathology, Gaziantep University Faculty of Medicine, Gaziantep, Turkey
| | - Onur Ince
- Department of Obstetrics and Gynecology, Kutahya Health Sciences University, Faculty of Medicine, Kutahya, Turkey
| | - Mehmet Akif Bozdayi
- Department of Biochemistry, Gaziantep University Faculty of Medicine, Gaziantep, Turkey
| | - Hasan Ulusal
- Department of Biochemistry, Gaziantep University Faculty of Medicine, Gaziantep, Turkey
| | - Seyithan Taysi
- Department of Biochemistry, Gaziantep University Faculty of Medicine, Gaziantep, Turkey
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Tuncer M, Trak B, Sapan M, Özcan S, Süleymanlar G, Yakupoglu G, Ersoy F. Successful Pregnancy Complicated with Peritonitis in a 25-Year-Old Turkish CAPD Patient. Perit Dial Int 2020. [DOI: 10.1177/089686080002000317] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Affiliation(s)
- M. Tuncer
- Nephrology Division SSK Hospital Antalya, Turkey
| | - B. Trak
- Department of Gynecology & Obstetrics SSK Hospital Antalya, Turkey
| | - M. Sapan
- Akdeniz University Medical School Department of Medicine SSK Hospital Antalya, Turkey
| | - S. Özcan
- Nephrology Division SSK Hospital Antalya, Turkey
| | | | - G. Yakupoglu
- Nephrology Division SSK Hospital Antalya, Turkey
| | - F.F. Ersoy
- Nephrology Division SSK Hospital Antalya, Turkey
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11
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Yaman AAM, Şahin M, Şimşek H, Akdağ S, Gümrükçüoğlu HA, Güler A, Öztürk F, Gümrükçüoğlu FN, Tuncer M. Maternal, fetal outcome, and anticoagulant management in pregnant women with prosthetic heart valves. CLIN EXP OBSTET GYN 2018. [DOI: 10.12891/ceog3818.2018] [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: 11/01/2022]
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12
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Erdem A, Gedikli E, Yersal N, Karaismailoglu S, Muftuoglu S, Fadillioglu E, Tuncer M. Protective role of erdosteine pretreatment on oleic acid–induced acute lung injury. J Surg Res 2017; 213:234-242. [DOI: 10.1016/j.jss.2017.02.061] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2016] [Revised: 01/12/2017] [Accepted: 02/24/2017] [Indexed: 11/24/2022]
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13
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Karaismailoglu S, Tuncer M, Bayrak S, Erdogan G, Ergun EL, Erdem A. The perinatal effects of maternal caffeine intake on fetal and neonatal brain levels of testosterone, estradiol, and dihydrotestosterone in rats. Naunyn-Schmiedeberg's Arch Pharmacol 2017; 390:827-838. [DOI: 10.1007/s00210-017-1383-2] [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] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 05/17/2017] [Indexed: 11/29/2022]
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14
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Caglar E, Hatipoglu E, Atasoy D, Niyazoglu M, Çağlar AS, Tuncer M, Dobrucali A, Kadioglu P. LONGER CECUM INSERTION TIME AND MORE INADEQUATE COLONIC PREPARATION IN PATIENTS WITH ACROMEGALY: IS A DIFFERENT COLONOSCOPY PREPARATION NEEDED? Acta Endocrinol (Buchar) 2017; 13:60-64. [PMID: 31149149 DOI: 10.4183/aeb.2017.60] [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] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Purpose To investigate whether there is a difference between acromegalic and non-acromegalic cases in terms of bowel preparation and colonoscopic intervention. Methods Patients with controlled and uncontrolled acromegaly and as a control group (CG) patients without acromegaly between January 2010 and March 2014 were included. Groups were compared regarding adequacy of bowel preparation, cecal insertion time (CIT) and colonoscopy results. Results Fifty-nine patients with acromegaly (controlled n=30, uncontrolled n=29) and 73 age and gender matched volunteers without acromegaly were evaluated. CIT in cases with controlled, uncontrolled acromegaly cases and in CG was 5.33 [4.00-6.00], 7.00 [4.91-11.31], and 3.10 [2.35-4.65] minutes, respectively (p<0.001). Cases in CG had shorter CIT compared to controlled and uncontrolled acromegaly cases ( p=0.014 and p<0.001, respectively). There was no significant difference regarding CIT between controlled and uncontrolled acromegaly cases (p=0.247). Six (20%) of controlled acromegaly patients, 10 (35%) of uncontrolled acromegaly patients and three (4%) of CG had inadequate bowel cleansing (p<0.001). Although statistically insignificant, cases with inadequate bowel cleansing had tendency towards having prolonged CIT in comparison to cases with adequate bowel cleansing (6.00 [3.87-9.00] and 4.16 [2.95-5.70] minutes, respectively, p=0.07). Conclusion Inadequate bowel cleansing is one of the main problems encountered during colonoscopic investigation/surveillance in acromegalic patients. Therefore, a different protocol for colonoscopy preparation may be needed for these cases.
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Affiliation(s)
- E Caglar
- Kayseri Education and Research Hospital, Gastroenterology and Hepatology, Kayseri, Istanbul, Turkey
| | - E Hatipoglu
- Istanbul University, Cerrahpasa Medical School, Endocrinology and Metabolism, Istanbul, Turkey
| | - D Atasoy
- Acıbadem University, School of Medicine, Atakent Hospital, General Surgery, Istanbul, Turkey
| | - M Niyazoglu
- Istanbul University, Cerrahpasa Medical School, Endocrinology and Metabolism, Istanbul, Turkey
| | - A S Çağlar
- Endocrinology and Metabolism, Erciyes University, Medical School, Kayseri, Istanbul, Turkey
| | - M Tuncer
- Istanbul University, Cerrahpasa Medical School, Gastroenterology and Hepatology, Istanbul, Turkey
| | - A Dobrucali
- Istanbul University, Cerrahpasa Medical School, Gastroenterology and Hepatology, Istanbul, Turkey
| | - P Kadioglu
- Istanbul University, Cerrahpasa Medical School, Endocrinology and Metabolism, Istanbul, Turkey
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15
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Akyol A, Akdag S, Asker M, Gumrukcuoglu HA, Duz R, Demirel KC, Ozturk F, Yaman M, Sahin M, Simsek H, Tuncer M, Begenik H. Effects of lowered dialysate sodium on left ventricle function and brain natriuretic peptide in maintenance of hemodialysis patients. Hum Exp Toxicol 2016; 36:128-134. [DOI: 10.1177/0960327116639362] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Introduction: Impaired diastolic flow is characterized by decreased left ventricular (LV) filling diastole, abnormal LV distensibility, or delayed relaxation. B-Type natriuretic peptide (BNP) is an indicator of various cardiovascular diseases and body volume status. The aim of this study was to determine whether the lowering of dialysate sodium (Na) levels is effective on LV systolic and diastolic parameters and BNP in the maintenance of hemodialysis patients. Materials and Methods: The study included 49 chronic hemodialysis patients. Left atrium (LA) diameter and LV ejection fraction, LV systolic and diastolic diameter, deceleration time (DT), pulmonary artery pressure (PAP), inferior vena cava diameter (IVCD), early diastolic transmitral flow ( E) and late diastolic transmitral flow ( A) velocities, E/ A ratio, isovolumic relaxation time, peak early diastolic velocity ( E′), late diastolic velocity ( A′) of tissue Doppler mitral annulus, and flow propagation velocity of mitral inflow ( Vp) were measured before and 6 months after hemodialysis with low Na dialysate. Results: Six months after low Na hemodialysis, a decrease was observed in echocardiographic parameters such as PAP and IVCD ( p < 0.05, p < 0.001, and p < 0.001, respectively). However, a significant difference was not observed in LA diameter. In LV diastolic measurement of E and A waves, E/ A ratio, DT, Vp, septal E′ and A′, and lateral E′ and A′ exhibited significant improvement by low Na HD. BNP level was significantly reduced ( p < 0.001). Conclusions: Lowered dialysate Na concentration improves PAP, IVCD, and LV diastolic properties assessed by mitral inflow filling, tissue Doppler velocity, and mitral inflow velocity propagation.
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Affiliation(s)
- A Akyol
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - S Akdag
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - M Asker
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - HA Gumrukcuoglu
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - R Duz
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - KC Demirel
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - F Ozturk
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - M Yaman
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - M Sahin
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - H Simsek
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - M Tuncer
- Department of Cardiology, Yuzuncu Yil University, Van, Turkey
| | - H Begenik
- Department of Nephrology, Yuzuncu Yil University, Van, Turkey
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16
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Tuncer M, Tekin S, Yuksel Y, Yücetin L, Dosemeci L, Sengul A, Demirbaş A. First International Paired Exchange Kidney Transplantations of Turkey. Transplant Proc 2016; 47:1294-5. [PMID: 26093701 DOI: 10.1016/j.transproceed.2015.04.011] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
OBJECTIVE We estimated that many patients on the waiting list for kidney transplantation in Turkey have immunologicaly incompatible suitable living donors. Paired exchange kidney transplantation (PETx) is superior to desensitization for patients with incompatible donors. Recently we decided to begin an international PETx program. METHODS We report three international living related paired kidney transplantations which occurred between May 14,2013, and March 7, 2014. The international donor and recipient operations were performed at Medical Park Hospital, Antalya, Turkey. All pairs were living related and written proofs were obtained according to Turkish laws. As with the donor procedures, the transplantation procedures were performed at the same time. RESULTS The uniqueness of these transplantations was that they are the first international exchange kidney transplantations between Turkey and Kirghizia. Currently all recipients are alive with wel-functioning grafts. CONCLUSION In our institute, a 5% increase was obtained in living-related kidney transplantations by the help of PETx on a national basis. We believe that international PETx may also have the potential to expand the donor pool.
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Affiliation(s)
- M Tuncer
- Department of Nephrology, Istanbul Kemerburgaz University, Istanbul, Turkey; Organ Transplant Center, Medical Park Antalya, Antalya, Turkey.
| | - S Tekin
- Organ Transplant Center, Medical Park Antalya, Antalya, Turkey; Department of General Surgery, Istanbul Kemerburgaz University, Istanbul, Turkey
| | - Y Yuksel
- Organ Transplant Center, Medical Park Antalya, Antalya, Turkey
| | - L Yücetin
- Organ Transplant Center, Medical Park Antalya, Antalya, Turkey
| | - L Dosemeci
- Organ Transplant Center, Medical Park Antalya, Antalya, Turkey; Department of Anesthesiology, Istanbul Kemerburgaz University, Istanbul, Turkey
| | - A Sengul
- Organ Transplant Center, Medical Park Antalya, Antalya, Turkey
| | - A Demirbaş
- Organ Transplant Center, Medical Park Antalya, Antalya, Turkey
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17
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Yucetin L, Bozoklar CA, Yanik O, Tekin S, Tuncer M, Demirbas A. An Investigation of Post-Traumatic Growth Experiences Among Living Kidney Donors. Transplant Proc 2016; 47:1287-90. [PMID: 26093699 DOI: 10.1016/j.transproceed.2015.04.027] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
More than 1 million patients are estimated to have undergone transplantation in the past years. In recent years, living-donor kidney transplantation accounted for more than 50% of all transplantations. Kidney transplantation from living donors is regarded as a contradictory case to the "do no harm" principle as a major surgical intervention is performed on a normal and healthy person at the expense of recovery of the organ recipient. The purpose of this study was to investigate positive psychological experiences, specifically post-traumatic growth (PTG), among living kidney donors. The sample consisted of a total of 184 kidney donors. The age of donors ranged between 21-76 (mean, 50.76; SD, 10.93). In this study 67.9% of donors were female. The recipients on dialysis group had higher scores than the recipients who did not have dialysis; the mean difference was significant on the subscales of change in life philosophy, change in relationships, change in self-perception, and in the PTGI score. The donors with higher education levels received higher scores on the subscale of change in relationships in comparison with donors with low education. The donors who were married and older than 51 years had higher scores than donors who were not married or younger on the subscale of change in self-perception. This is a single-center study; this center performs more than 500 kidney transplantations per year. There is a good system and experience at each step before and after transplantation for donor and recipient and relatives. It is a really big potential trauma to donate a kidney to your relative; you can change this negative effect to a positive effect with a good system. The present study also showed that when compared with the scale's absolute midpoint, kidney donors in the study sample experienced moderate-to-high levels of PTG.
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Affiliation(s)
- L Yucetin
- Antalya Medical Park Hospital, Antalya, Turkey.
| | | | - O Yanik
- Antalya Medical Park Hospital, Antalya, Turkey
| | - S Tekin
- Kemerburgaz University, Istanbul, Turkey
| | - M Tuncer
- Kemerburgaz University, Istanbul, Turkey
| | - A Demirbas
- Antalya Medical Park Hospital, Antalya, Turkey
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18
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Tekin S, Yavuz HA, Yuksel Y, Ateş I, Yucetin L, Dosemeci L, Tuncer M, Demirbas A. Renal Transplantation in Recipients Older Than 65 Years: Retrospective Analysis of the Results of a 4-year (2008-2012) Experience. Transplant Proc 2015; 47:1356-9. [PMID: 26093718 DOI: 10.1016/j.transproceed.2015.04.016] [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] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
BACKGROUND We analyze the results of renal transplantation among recipients older than 65 years old over a 4-year period (2008-2012) from a single renal transplantation unit and compare results with younger recipients. METHODS We retrospectively analyzed the outcomes of 2018 renal transplantations performed between November 2008 and December 2012. The χ(2) test was used for the comparison of categorical data, and the Student t test was used for the analysis of continuous variables. Patient and graft cumulative actuarial survivals were calculated using the Kaplan-Meier analysis and we tested for differences with the Mantel-Cox log-rank test. RESULTS Seventy-five (3.7%) recipients were aged ≥ 65 years with a median age of 68 (range, 65 to 82) years. Actuarial graft survivals at 1, 2, and 3 years were 93.8%, 92.5%, and 90.3%, respectively, for the <65 group and 89.7%, 88.1%, and 83.1%, respectively, for the ≥ 65 group (P < .03). Actuarial patient survivals at 1, 2, and 3 years were 96.3%, 95.5%, and 94.7%, respectively, for the younger and 91.8%, 90.2%, and 88%, respectively, for the older samples (P < .03). When graft survival was censored for patient death with a functioning kidney at 1, 2, and 3 years, the results were similar between groups with 95.5%, 94%, and 92.8%, respectively, for recipients aged <65 years and 94.7%, 89.2%, and 89.2%, respectively, for recipients aged ≥ 65 years (P = .213). CONCLUSIONS Our results showed that renal transplantation in selected patients older than 65 years was associated with good outcomes; this indicates that it seems safe and effective to treat end-stage renal disease in the elderly knowing there are acceptable rates of graft and patient survival.
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Affiliation(s)
- S Tekin
- General Surgery and Transplantation Unit, Medical Park Hospital, Kemerburgaz University, Antalya, Turkey
| | - H A Yavuz
- Nephrology and Renal Transplantation, Atakent Research and Education Hospital, Acibadem University, Istanbul, Turkey.
| | - Y Yuksel
- General Surgery and Transplantation Unit, Medical Park Hospital, Antalya, Turkey
| | - I Ateş
- Department of Cardiology, Medlina BSK Lara, Antalya, Turkey
| | - L Yucetin
- Organ Transplantation Coordination Unit Medical Park Hospital, Antalya, Turkey
| | - L Dosemeci
- Intensive Care Unit, Medical Park Hospital, Antalya, Turkey
| | - M Tuncer
- Nephrology and Renal Transplantation, Antalya Medical Park Hospital, Kemerburgaz University, Antalya, Turkey
| | - A Demirbas
- General Surgery and Transplantation Unit, Medical Park Hospital, Antalya, Turkey
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19
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Asuman Yavuz H, Tekin S, Yuksel Y, Ateş I, Yucetin L, Demir M, Uygun B, Tuncer M, Demirbas A. Donors With Hepatitis B Surface Antigen Positivity. Transplant Proc 2015; 47:1312-4. [DOI: 10.1016/j.transproceed.2015.04.014] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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20
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Yurtdaş M, Kaya Y, Özdemir M, Aladağ N, Tosu A, Tuncer M. OP-065 Transradial Primary Percutaneous Coronary Intervention is associated with Low Rates of Clinical and Cardiovascular Events in Patients with Acute ST Elevation Myocardial Infarction. Am J Cardiol 2014. [DOI: 10.1016/j.amjcard.2014.01.053] [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: 11/25/2022]
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21
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Yücetin L, Tilif S, Keçecioğlu N, Yanik Ö, Özkan A, Eroğlu A, Dheir H, Tekin S, Güven B, Dinçkan A, Kaçar S, Tuncer M. Paired Exchange Kidney Transplantation Experience of Turkey. Transplant Proc 2013; 45:860-3. [DOI: 10.1016/j.transproceed.2013.02.094] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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22
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Hirsch HH, Vincenti F, Friman S, Tuncer M, Citterio F, Wiecek A, Scheuermann EH, Klinger M, Russ G, Pescovitz MD, Prestele H. Polyomavirus BK replication in de novo kidney transplant patients receiving tacrolimus or cyclosporine: a prospective, randomized, multicenter study. Am J Transplant 2013; 13:136-45. [PMID: 23137180 PMCID: PMC3563214 DOI: 10.1111/j.1600-6143.2012.04320.x] [Citation(s) in RCA: 179] [Impact Index Per Article: 16.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2012] [Revised: 09/06/2012] [Indexed: 01/25/2023]
Abstract
Polyomavirus BK (BKV)-associated nephropathy causes premature kidney transplant (KT) failure. BKV viruria and viremia are biomarkers of disease progression, but associated risk factors are controversial. A total of 682 KT patients receiving basiliximab, mycophenolic acid (MPA), corticosteroids were randomized 1:1 to cyclosporine (CsA) or tacrolimus (Tac). Risk factors were analyzed in 629 (92.2%) patients having at least 2 BKV measurements until month 12 posttransplant. Univariate analysis associated CsA-MPA with lower rates of viremia than Tac-MPA at month 6 (10.6% vs. 16.3%, p = 0.048) and 12 (4.8% vs. 12.1%, p = 0.004) and lower plasma BKV loads at month 12 (3.9 vs. 5.1 log(10) copies/mL; p = 0.028). In multivariate models, CsA-MPA remained associated with less viremia than Tac-MPA at month 6 (OR 0.60; 95% CI 0.36-0.99) and month 12 (OR 0.33; 95% CI 0.16-0.68). Viremia at month 6 was also independently associated with higher steroid exposure until month 3 (OR 1.19 per 1 g), and with male gender (OR 2.49) and recipient age (OR 1.14 per 10 years) at month 12. The data suggest a dynamic risk factor evolution of BKV viremia consisting of higher corticosteroids until month 3, Tac-MPA compared to CsA-MPA at month 6 and Tac-MPA, older age, male gender at month 12 posttransplant.
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Affiliation(s)
- H H Hirsch
- Transplantation and Clinical Virology, Department Biomedicine—Building Petersplatz, University of BaselBasel, Switzerland,Division of Infectious Diseases and Hospital Epidemiology, University Hospital BaselSwitzerland,*Corresponding author: Hans H. Hirsch,
| | - F Vincenti
- University of California San Francisco, Kidney Transplant ServiceSan Francisco, CA
| | - S Friman
- Department of Transplantation and Liver Surgery, Sahlgrenska University HospitalGothenburg, Sweden
| | - M Tuncer
- MedicalPark Hospital, Organ Transplant CenterAntalya, Turkey
| | - F Citterio
- Division of Organ Transplantation, Department of Surgery, Catholic University of the Sacred HeartRome, Italy
| | - A Wiecek
- Department of Nephrology, Endocrinology and Metabolic Diseases, Medical University of SilesiaKatowice, Poland
| | - E H Scheuermann
- Department of Nephrology, University HospitalFrankfurt am Main, Germany
| | - M Klinger
- Department of Nephrology and Transplantation Medicine, Medical UniversityWroclaw, Poland
| | - G Russ
- The Queen Elizabeth HospitalWoodwille, Australia
| | - M D Pescovitz
- Departments of Surgery and Microbiology/Immunology, Indiana UniversityIndianapolis, IN
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23
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Hirsch HH, Vincenti F, Friman S, Tuncer M, Citterio F, Wiecek A, Scheuermann EH, Klinger M, Russ G, Pescovitz MD, Prestele H. Polyomavirus BK replication in de novo kidney transplant patients receiving tacrolimus or cyclosporine: a prospective, randomized, multicenter study. Am J Transplant 2012. [PMID: 23137180 DOI: 10.1111/j.1600-6143.2012.04320.x,] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Polyomavirus BK (BKV)-associated nephropathy causes premature kidney transplant (KT) failure. BKV viruria and viremia are biomarkers of disease progression, but associated risk factors are controversial. A total of 682 KT patients receiving basiliximab, mycophenolic acid (MPA), corticosteroids were randomized 1:1 to cyclosporine (CsA) or tacrolimus (Tac). Risk factors were analyzed in 629 (92.2%) patients having at least 2 BKV measurements until month 12 posttransplant. Univariate analysis associated CsA-MPA with lower rates of viremia than Tac-MPA at month 6 (10.6% vs. 16.3%, p = 0.048) and 12 (4.8% vs. 12.1%, p = 0.004) and lower plasma BKV loads at month 12 (3.9 vs. 5.1 log(10) copies/mL; p = 0.028). In multivariate models, CsA-MPA remained associated with less viremia than Tac-MPA at month 6 (OR 0.60; 95% CI 0.36-0.99) and month 12 (OR 0.33; 95% CI 0.16-0.68). Viremia at month 6 was also independently associated with higher steroid exposure until month 3 (OR 1.19 per 1 g), and with male gender (OR 2.49) and recipient age (OR 1.14 per 10 years) at month 12. The data suggest a dynamic risk factor evolution of BKV viremia consisting of higher corticosteroids until month 3, Tac-MPA compared to CsA-MPA at month 6 and Tac-MPA, older age, male gender at month 12 posttransplant.
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Affiliation(s)
- H H Hirsch
- Transplantation and Clinical Virology, Department Biomedicine-Building Petersplatz, University of Basel, Switzerland.
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24
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Hirsch HH, Vincenti F, Friman S, Tuncer M, Citterio F, Wiecek A, Scheuermann EH, Klinger M, Russ G, Pescovitz MD, Prestele H. Polyomavirus BK replication in de novo kidney transplant patients receiving tacrolimus or cyclosporine: a prospective, randomized, multicenter study. Am J Transplant 2012. [PMID: 23137180 DOI: 10.1111/j.1600-6143.2012.04320.x;] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Polyomavirus BK (BKV)-associated nephropathy causes premature kidney transplant (KT) failure. BKV viruria and viremia are biomarkers of disease progression, but associated risk factors are controversial. A total of 682 KT patients receiving basiliximab, mycophenolic acid (MPA), corticosteroids were randomized 1:1 to cyclosporine (CsA) or tacrolimus (Tac). Risk factors were analyzed in 629 (92.2%) patients having at least 2 BKV measurements until month 12 posttransplant. Univariate analysis associated CsA-MPA with lower rates of viremia than Tac-MPA at month 6 (10.6% vs. 16.3%, p = 0.048) and 12 (4.8% vs. 12.1%, p = 0.004) and lower plasma BKV loads at month 12 (3.9 vs. 5.1 log(10) copies/mL; p = 0.028). In multivariate models, CsA-MPA remained associated with less viremia than Tac-MPA at month 6 (OR 0.60; 95% CI 0.36-0.99) and month 12 (OR 0.33; 95% CI 0.16-0.68). Viremia at month 6 was also independently associated with higher steroid exposure until month 3 (OR 1.19 per 1 g), and with male gender (OR 2.49) and recipient age (OR 1.14 per 10 years) at month 12. The data suggest a dynamic risk factor evolution of BKV viremia consisting of higher corticosteroids until month 3, Tac-MPA compared to CsA-MPA at month 6 and Tac-MPA, older age, male gender at month 12 posttransplant.
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Affiliation(s)
- H H Hirsch
- Transplantation and Clinical Virology, Department Biomedicine-Building Petersplatz, University of Basel, Switzerland.
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25
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Hirsch HH, Vincenti F, Friman S, Tuncer M, Citterio F, Wiecek A, Scheuermann EH, Klinger M, Russ G, Pescovitz MD, Prestele H. Polyomavirus BK Replication in
De Novo
Kidney Transplant Patients Receiving Tacrolimus or Cyclosporine: A Prospective, Randomized, Multicenter Study. Am J Transplant 2012. [DOI: 10.1111/j.1600-6143.2012.04320.x\] [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: 11/30/2022]
Affiliation(s)
- H. H. Hirsch
- Transplantation and Clinical Virology Department Biomedicine—Building Petersplatz University of Basel Basel Switzerland
- Division of Infectious Diseases and Hospital Epidemiology University Hospital Basel Switzerland
| | - F. Vincenti
- University of California San Francisco Kidney Transplant Service San Francisco CA
| | - S. Friman
- Department of Transplantation and Liver Surgery Sahlgrenska University Hospital Gothenburg Sweden
| | - M. Tuncer
- MedicalPark Hospital Organ Transplant Center Antalya Turkey
| | - F. Citterio
- Division of Organ Transplantation Department of Surgery Catholic University of the Sacred Heart Rome Italy
| | - A. Wiecek
- Department of Nephrology Endocrinology and Metabolic Diseases Medical University of Silesia Katowice Poland
| | - E. H. Scheuermann
- Department of Nephrology University Hospital Frankfurt am Main Germany
| | - M. Klinger
- Department of Nephrology and Transplantation Medicine Medical University Wroclaw Poland
| | - G. Russ
- The Queen Elizabeth Hospital Woodwille Australia
| | - M. D. Pescovitz
- Departments of Surgery and Microbiology/Immunology Indiana University Indianapolis IN
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26
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Hirsch HH, Vincenti F, Friman S, Tuncer M, Citterio F, Wiecek A, Scheuermann EH, Klinger M, Russ G, Pescovitz MD, Prestele H. Polyomavirus BK Replication in
De Novo
Kidney Transplant Patients Receiving Tacrolimus or Cyclosporine: A Prospective, Randomized, Multicenter Study. Am J Transplant 2012. [DOI: 10.1111/j.1600-6143.2012.04320.x or 1=1] [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: 11/29/2022]
Affiliation(s)
- H. H. Hirsch
- Transplantation and Clinical Virology Department Biomedicine—Building Petersplatz University of Basel Basel Switzerland
- Division of Infectious Diseases and Hospital Epidemiology University Hospital Basel Switzerland
| | - F. Vincenti
- University of California San Francisco Kidney Transplant Service San Francisco CA
| | - S. Friman
- Department of Transplantation and Liver Surgery Sahlgrenska University Hospital Gothenburg Sweden
| | - M. Tuncer
- MedicalPark Hospital Organ Transplant Center Antalya Turkey
| | - F. Citterio
- Division of Organ Transplantation Department of Surgery Catholic University of the Sacred Heart Rome Italy
| | - A. Wiecek
- Department of Nephrology Endocrinology and Metabolic Diseases Medical University of Silesia Katowice Poland
| | - E. H. Scheuermann
- Department of Nephrology University Hospital Frankfurt am Main Germany
| | - M. Klinger
- Department of Nephrology and Transplantation Medicine Medical University Wroclaw Poland
| | - G. Russ
- The Queen Elizabeth Hospital Woodwille Australia
| | - M. D. Pescovitz
- Departments of Surgery and Microbiology/Immunology Indiana University Indianapolis IN
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Tuncer M, Tekin S, Yücetin L, Şengül A, Demirbas A. Comparison of Paired Exchange Kidney Transplantations With Living Related Kidney Transplantations. Transplant Proc 2012; 44:1626-7. [DOI: 10.1016/j.transproceed.2012.05.045] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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Tuncer M, Tekin S, Yücetin L, Şengül A, Demirbaş A. Hepatitis B Surface Antigen Positivity Is Not a Contraindication for Living Kidney Donation. Transplant Proc 2012; 44:1628-9. [DOI: 10.1016/j.transproceed.2012.04.015] [Citation(s) in RCA: 16] [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: 12/11/2022]
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Akdağ S, Akyol A, Gümrükçüoğlu H, Şahin M, Şimsek H, Yaman M, Sünnetçioğlu M, Tuncer M. PP-074 CHARACTERISTICS OF CASES FOLLOWED WITH INFECTIVE ENDOCARDITIS: SHOULD BRUCELLA COME TO MIND IN EVERY INFECTIVE ENDOCARDITIS PATIENT? Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70297-8] [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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Çelik M, Tuncer M, Akil M, Yüksel U. PP-178 MULTIPLE LEFT ANTERIOR DESCENDING CORONARY ARTERY-LEFT VENTRICULAR MICROFISTULAE. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70381-9] [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: 11/30/2022]
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Tuncer M, Çelik M, Akil M. PP-196 A RARE BUT SERIOUS COMPLICATION OF CORONARY ANGIOGRAPHY: TRANSIENT CORTICAL BLINDNESS. Int J Cardiol 2012. [DOI: 10.1016/s0167-5273(12)70396-0] [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: 11/16/2022]
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Tuncer M, Celik O, Kuyumcuoglu U, Arda E. UP-02.045 Management of Serious Bleeding After Percutaneous Nephrolithotomy. Urology 2011. [DOI: 10.1016/j.urology.2011.07.863] [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: 10/15/2022]
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Eryildirim B, Tuncer M, Kuyumcuoglu U, Faydaci G, Tarhan F, Ozgül A. Do ureteral catheterisation procedures affect sexual functions? A controlled prospective study. Andrologia 2011; 44 Suppl 1:419-23. [DOI: 10.1111/j.1439-0272.2011.01199.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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Yavas G, Yildiz F, Guler S, Sargon M, Yildiz D, Yolcu T, Tuncer M, Akyol F. Concomitant trastuzumab with thoracic radiotherapy: a morphological and functional study. Ann Oncol 2011; 22:1120-1126. [DOI: 10.1093/annonc/mdq590] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Tuzun N, Tuncer M, Yilmaz H. PP-242: LEFT MAIN ANEURYSM. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70431-4] [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: 11/16/2022]
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Akdag S, Sahin M, Simsek H, Gumrukcuoglu H, Tuncer M. PP-135: SEVERE MITRAL AND AORTA INSUFFICIENCY IN PATIENT WITH ACUTE RHEUMATISMAL FEVER. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70367-9] [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: 10/18/2022]
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Gunes Y, Gumrukcuoglu H, Akdag S, Simsek H, Sahin M, Tuncer M. PP-062: VASCULAR ENDOTHELIAL FUNCTION IN PATIENTS WITH CORONARY SLOW FLOW AND THE EFFECTS OF NEBIVOLOL. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70337-0] [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: 11/29/2022]
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Gumrukcuoglu H, Tuncer M, Simsek H, Sahin M, Akdag S, Gunes Y, Tombul T. OP-046: EFFECTS OF ILLNESS ACTIVITY ON ELECTROCARDIOGRAPHIC PARAMETERS IN PATIENTS WITH MULTIPLE SCLEROSIS. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70153-x] [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: 11/16/2022]
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40
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Gunes Y, Y L Y, Gumrukcuoglu HA, Tuncer M. Role of echocardiography in the evaluation of atrial function and diseases. Minerva Cardioangiol 2010; 58:379-397. [PMID: 20485242] [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: 05/29/2023]
Abstract
This article describes four essential components (hemodynamic, bioelectrical, hormonal and metabolic) of atrial function. And then discusses the traditional and more recent echocardiographic measures that have been employed to evaluate atrial function. Conventional parameters include the study of the various phases of atrial activity using atrial volume measurements, the peak A wave velocity, its velocity time integral (VTI), fraction of atrial contribution and atrial ejection force. Newer parameters for atrial function assessment include Doppler tissue imaging (DTI) including segmental atrial contractility using color Doppler tissue imaging (CDTI) and estimates of atrial strain and strain rate. Furthermore, the authors relate various particular types of atrial function in physiological and in selected pathological conditions.
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Affiliation(s)
- Y Gunes
- Yuzuncu Yil University, Faculty of Medicine, Cardiology Department, Van, Turkey.
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Abstract
AIMS We studied determinants of serum apolipoprotein C-III (apoC-III) and whether levels of apoC-III or its fractions predict metabolic syndrome (MetS), Type 2 diabetes and coronary heart disease (CHD). METHODS The predictive value of apoC-III, measured by immunoturbimetric immunoassay in 802 tracked individuals of a Turkish general population in determining cardiometabolic risk was assessed over 4.4 +/- 1.2 years' follow-up. Patients with MetS, Type 2 diabetes and CHD at baseline were excluded. RESULTS Total apoC-III, as well as both fractions, was significantly, linearly and inversely related to smoking status, positively to alcohol usage and to levels of complement C3. Mid and high tertiles of total or non-high density lipoprotein (HDL) apoC-III predicted significantly and independently incident MetS; they predicted CHD with risk ratios of 1.6 [95% confidence intervals (CI) 1.02-2.5], for 1 sd increment, after adjustments that included HDL cholesterol and body mass index (BMI). The highest tertile of HDL apoC-III was a major independent predictor of new-onset diabetes with a 2.5-fold risk ratio for 1 sd increment (95% CI 1.5-4.0) in combined sexes, after adjustment for waist circumference, HDL cholesterol and other confounders and was a better predictor than waist girth. CONCLUSIONS Serum total apoC-III or its fractions are linearly and inversely associated with smoking, positively with alcohol usage and serum complement C3. The presumably dysfunctional HDL apoC-III is a stronger predictor of Type 2 diabetes than waist girth in Turks. Non-HDL apoC-III predicts strongly the development of MetS as well as incident CHD, independent of HDL cholesterol, BMI and non-lipid factors. The atherogenicity of apoC-III and dysfunctionality of HDL apoC-III carry huge public health implications in Turks.
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Affiliation(s)
- A Onat
- Turkish Society of Cardiology, Department of Cardiology, Cerrahpaşa Medical Faculty, Istanbul University, Turkey.
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Kocak H, Gumuslu S, Sahin E, Ceken K, Ermis C, Gocmen AY, Yakupoglu G, Ersoy FF, Suleymanlar G, Tuncer M. Relationship between carotid artery intima-media thickness and brachial artery flow-mediated dilation in peritoneal dialysis patients. Int Urol Nephrol 2008; 41:409-16. [PMID: 19115078 DOI: 10.1007/s11255-008-9504-y] [Citation(s) in RCA: 7] [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: 05/04/2008] [Accepted: 11/01/2008] [Indexed: 11/30/2022]
Abstract
BACKGROUND AND AIM Carotid artery intima-media thickness (CIMT) and brachial artery flow-mediated dilation percentage (FMD%) are two commonly used parameters for detecting subclinical atherosclerosis. However, studies investigating the relationship between CIMT and brachial artery FMD% in different populations have produced conflicting results. The aim of this study was to determine the relationship between CIMT and brachial artery FMD% in patients on peritoneal dialysis (PD) METHODS: Fifty-two PD patients without known cardiovascular disease and 30 age-gender matched controls were included in the study. Endothelial function was determined using ultrasonography (US) to measure the FMD of the brachial artery, and this parameter was expressed as the percentage change from the baseline diameter of the brachial artery (FMD%). We also measured CIMT by US and analysed the relationship between CIMT and brachial FMD%. RESULTS The CIMT was significantly higher in patients than in the control group (0.84 +/- 0.08 vs. 0.75 +/- 0.06 mm, P < 0.01), whereas brachial artery FMD% was lower in patients than in the controls (8.2 +/- 5.0 vs. 11.7 +/- 5.5%, P < 0.01). There was no significant correlation between CIMT and FMD% (r = -0.004, P = 0.94). CONCLUSION Although PD patients are known to be characterized by an impaired flow-mediated vasodilatation of brachial artery and increased in CIMT, we did not find a significant correlation between FMD% and CIMT in our PD patient cohort. One possible explanation for our results is that each method measures a different aspect and stage of atherosclerosis.
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Affiliation(s)
- H Kocak
- Department of Nephrology, Faculty of Medicine, Akdeniz University, Kampus, 07070 Antalya, Turkey.
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Boyle P, Anderson B, Andersson L, Ariyaratne Y, Auleley GR, Barbacid M, Bartelink H, Baselga J, Behbehani K, Belardelli F, Berns A, Bishop J, Brawley O, Burns H, Clanton M, Cox B, Currow D, Dangou JM, de Valeriola D, Dinshaw K, Eggermont A, Fitzpatrick J, Forstmane M, Garaci E, Gavin A, Kakizoe T, Kasler M, Keita N, Kerr D, Khayat D, Khleif S, Khuhaprema T, Knezevic T, Kubinova R, Mallath M, Martin-Moreno J, McCance D, McVie J, Merriman A, Ngoma T, Nowacki M, Orgelbrand J, Park JG, Pierotti M, Ashton L, Puska P, Escobar C, Rajan B, Rajkumar T, Ringborg U, Robertson C, Rodger A, Roovali L, Santini L, Sarhan M, Seffrin J, Semiglazov V, Shrestha B, Soo K, Stamenic V, Tamblyn C, Thomas R, Tuncer M, Tursz T, Vaitkiene R, Vallejos C, Veronesi U, Wojtyla A, Yach D, Yoo KY, Zatonski W, Zaridze D, Zeng YX, Zhao P, Zheng T. Need for global action for cancer control. Ann Oncol 2008; 19:1519-21. [DOI: 10.1093/annonc/mdn426] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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44
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Yildirim I, Aytac S, Ceyhan M, Cetin M, Tuncer M, Cengiz AB, Secmeer G, Yetgin S. Piperacillin/tazobactam plus amikacin versus carbapenem monotherapy as empirical treatment of febrile neutropenia in childhood hematological malignancies. Pediatr Hematol Oncol 2008; 25:291-9. [PMID: 18484473 DOI: 10.1080/08880010802016847] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
A prospective, randomized clinical trial was conducted to compare the efficacy of piperacillin/tazobactam and amikacin combination with carbapenem monotherapy for the empirical treatment of febrile neutropenic episodes of children with acute lymphoblastic leukemia or acute myeloblastic leukemia. Patients aged 2-16 years with hematological malignancies who had febrile neutropenia were randomly assigned to receive piperacillin/tazobactam (80 mg/kg piperacillin/10 mg/kg tazobactam, q6h) combined with amikacin (PTA) (7.5 mg/kg, q12h) or meropenem or imipenem (20 mg/kg, q8h) (C). Response to antimicrobial therapy, evaluated for etiological agents, was measured. Duration of fever, neutropenia, and hospitalization, mortality, and the need for additional antibiotics or antifungal drugs were compared for the treatment success between the two groups. Out of 87 febrile neutropenic episodes that were evaluable for comparison, 46 patients received PTA and 41 patients were treated with carbapenems (imipenem or meropenem). Overall, the microbiologically documented infection rate was 21.9%, with Staphylococcus epidermidis as the most common cause of bacteremia. The rate of treatment modification was 56.5% in the PTA group and 53.6% in the carbapenem group with no statistical difference (p > .05). There was no infection-related mortality during the study period. There was no difference between the two regimens for durations of fever, neutropenia, and hospitalization (p > .05 for all categories). PTA was as effective as carbapenem monotherapy as an initial empirical regimen in febrile neutropenic episodes of pediatric hematological malignancies.
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Affiliation(s)
- I Yildirim
- Department of Pediatric Infectious Diseases, Hacettepe University, Ankara, Turkey.
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Vincenti F, Friman S, Scheuermann E, Rostaing L, Jenssen T, Campistol JM, Uchida K, Pescovitz MD, Marchetti P, Tuncer M, Citterio F, Viecek A, Chadban S, El-Shahawy M, Budde K, Goto N. Results of an international, randomized trial comparing glucose metabolism disorders and outcome with cyclosporine versus tacrolimus. Am J Transplant 7. Clin J Am Soc Nephrol 2008; 3:7-9. [PMID: 37001057 DOI: 10.2215/01.cjn.0000926940.97537.78] [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: 03/30/2023]
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46
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Tuncer M, Fettser DV, Gunes Y, Batyraliev TA, Guntekin U, Gumrukchuoglu KA, Eryonucu B, Guler N, Sidorenko BA. [Comparison of effects of nebivolol and atenolol on P-wave dispersion in patients with hypertension]. Kardiologiia 2008; 48:42-45. [PMID: 18447840] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND P-wave dispersion has been shown to be a noninvasive electrocardiographic predictor for development of atrial fibrillation . Thus it may be possible to attenuate atrial fibrillation risk through normalization of P-wave variables and improvement in P-wave dispersion may be an important goal in treatment of hypertension. OBJECTIVE To compare the effects of nebivolol, a new b-blocker that have additional vasodilating activity via acting on endothelium and nitric oxide release, and atenolol on P-wave duration and dispersion in patients with mild-to-moderate hypertension. METHODS A total of 34 newly-diagnosed hypertensive patients were enrolled in the study. The patients were randomly assigned to receive treatment with either nebivolol (5 mg) or atenolol (50 mg). P-wave durations (Pmin and Pmax) and P-wave dispersion were measured before and one month after treatment. RESULTS While Pmin increased (50,6 +/- 11,2 ms to 54,7 +/- 9,1 ms, p=0,05), Pmax decreased (111,9 +/- 9,1 ms to 104,0 +/- 12,4 ms, p=0,003) and P-wave dispersion decreased (62,5 +/- 10,6 ms to 51,3 +/- 8,9 ms, p < 0,001) with nebivolol, Pmin increased (44,4 +/- 9,8 ms to 58,0 +/- 15,5 ms, p=0,02), Pmax didn t change (106,1 +/- 13,8 ms to 107,0 +/- 11,6 ms, p=NS) and P-wave dispersion decreased (61,7 +/- 15,0 ms to 49,0 +/- 13,7 ms, p < 0.001) with atenolol. However, there was no statistical difference between pre- and post-treatment values of two groups. CONCLUSIONS Both nebivolol and atenolol are effective in improvement of P-wave dispersion in patients with hypertension and there s no significant difference between them.
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Tuncer M, Fettser D, Gunes Y, Batyraliev TA, Guntekin U, Gumrukchuoglu KA, Eryonucu B, Guler N. [P wave dispersion in hypertensive urgency]. Kardiologiia 2008; 48:27-29. [PMID: 18537799] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
BACKGROUND AND PURPOSE P wave dispersion (PWD) has been accepted as a predictor for atrial fibrillation (AF) in hypertension and some other cardiac diseases. The aim of this study was to compare the P wave parameters between patients with mild-moderate hypertension and those with hypertensive crises. METHODS A total of 48 patients, 24 of who presented to the emergency department with hypertensive urgency and 24 patients who were followed in the cardiology clinic with mild-moderate essential hypertension were included in this study. P wave durations were measured manually by two investigators blinded to data of patients. RESULTS The maximal duration of P wave (P max) and the PWD were found to be significantly different between groups, being longer in patients with hypertensive urgency (p=0,05 and 0,02; respectively). CONCLUSIONS PWD increases in hypertensive urgency states. Clinical implication of this finding should be addressed with further, prospective studies conducted on larger samples.
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Kocak H, Gumuslu S, Ermis C, Mahsereci E, Sahin E, Gocmen AY, Ersoy F, Suleymanlar G, Yakupoglu G, Tuncer M. Oxidative stress and asymmetric dimethylarginine is independently associated with carotid intima media thickness in peritoneal dialysis patients. Am J Nephrol 2007; 28:91-6. [PMID: 17914250 DOI: 10.1159/000109397] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [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: 06/07/2007] [Accepted: 08/17/2007] [Indexed: 01/12/2023]
Abstract
BACKGROUND Oxidative stress (OS) and asymmetric dimethylarginine (ADMA) are accepted as nonclassical cardiovascular risk factors in end-stage renal disease patients. To clarify the role of these factors in the atherosclerotic process, we investigated if OS and ADMA are associated with common carotid artery intima media thickness (CIMT) in peritoneal dialysis (PD) patients. METHODS Thirty PD patients without known atherosclerotic disease and classical cardiovascular risk factors as well as age- and gender-matched 30 healthy individuals were included. We measured serum thiobarbituric acid-reactive substances (TBARS), malondialdehyde (MDA), advanced glycation end product (AGE), pentosidine, advanced oxidation protein products (AOPP), ADMA and CIMT in each subjects. RESULTS TBARS, MDA, AOPP, AGE, pentosidine and ADMA levels were significantly higher in PD patients than in controls (p < 0.001). CIMT in patients was higher than in the control group (0.83 +/- 0.09 vs. 0.77 +/- 0.06 mm; p < 0.01). CIMT was independently correlated with TBARS (beta = 0.33, p < 0.01), MDA (beta = 0.27, p < 0.01), AOPP (beta = 0.22, p < 0.02), AGE (beta = 0.45, p < 0.01), pentosidine (beta = 0.56, p < 0.01) and ADMA (beta = 0.54, p < 0.01). CONCLUSIONS OS markers and serum ADMA levels independently predict the CIMT level in PD patients.
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Affiliation(s)
- H Kocak
- Department of Nephrology, Faculty of Medicine, Akdeniz University, Antalya, Turkey
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Asberg A, Humar A, Rollag H, Jardine AG, Mouas H, Pescovitz MD, Sgarabotto D, Tuncer M, Noronha IL, Hartmann A. Oral valganciclovir is noninferior to intravenous ganciclovir for the treatment of cytomegalovirus disease in solid organ transplant recipients. Am J Transplant 2007; 7:2106-13. [PMID: 17640310 DOI: 10.1111/j.1600-6143.2007.01910.x] [Citation(s) in RCA: 275] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Intravenous ganciclovir is the standard treatment for cytomegalovirus disease in solid organ transplant recipients. Oral valganciclovir is a more convenient alternative. In a randomized, international trial, recipients with cytomegalovirus disease were treated with either 900 mg oral valganciclovir or 5 mg/kg i.v. ganciclovir twice daily for 21 days, followed by 900 mg daily valganciclovir for 28 days. A total of 321 patients were evaluated (valganciclovir [n = 164]; i.v. ganciclovir [n = 157]). The success rate of viremia eradication at Day 21 was 45.1% for valganciclovir and 48.4% for ganciclovir (95% CI -14.0% to +8.0%), and at Day 49; 67.1% and 70.1%, respectively (p = NS). Treatment success, as assessed by investigators, was 77.4% versus 80.3% at Day 21 and 85.4% versus 84.1% at Day 49 (p = NS). Baseline viral loads were not different between groups and decreased exponentially with similar half-lives and median time to eradication (21 vs. 19 days, p = 0.076). Side-effects and discontinuations of assigned treatment (18 of 321 patients) were comparable. Oral valganciclovir shows comparable safety and is not inferior to i.v. ganciclovir for treatment of cytomegalovirus disease in organ transplant recipients and provides a simpler treatment strategy, but care should be taken in extrapolating to organ transplant recipients not properly represented in the present study.
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Affiliation(s)
- A Asberg
- Department of Pharmaceutical Biosciences, School of Pharmacy, University of Oslo, Oslo, Norway
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50
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Vincenti F, Friman S, Scheuermann E, Rostaing L, Jenssen T, Campistol JM, Uchida K, Pescovitz MD, Marchetti P, Tuncer M, Citterio F, Wiecek A, Chadban S, El-Shahawy M, Budde K, Goto N. Results of an international, randomized trial comparing glucose metabolism disorders and outcome with cyclosporine versus tacrolimus. Am J Transplant 2007; 7:1506-14. [PMID: 17359512 DOI: 10.1111/j.1600-6143.2007.01749.x] [Citation(s) in RCA: 434] [Impact Index Per Article: 25.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
DIRECT (Diabetes Incidence after Renal Transplantation: Neoral C(2) Monitoring Versus Tacrolimus) was a 6-month, open-label, randomized, multicenter study which used American Diabetes Association/World Health Organization criteria to define glucose abnormalities. De novo renal transplant patients were randomized to cyclosporine microemulsion (CsA-ME, using C(2) monitoring) or tacrolimus, with mycophenolic acid, steroids and basiliximab. The intent-to-treat population comprised 682 patients (336 CsA-ME, 346 tacrolimus): 567 were nondiabetic at baseline. Demographics, diabetes risk factors and steroid doses were similar between treatment groups. The primary safety endpoint, new-onset diabetes after transplant (NODAT) or impaired fasting glucose (IFG) at 6 months, occurred in 73 CsA-ME patients (26.0%) and 96 tacrolimus patients (33.6%, p = 0.046). The primary efficacy endpoint, biopsy-proven acute rejection, graft loss or death at 6 months, occurred in 43 CsA-ME patients (12.8%) and 34 tacrolimus patients (9.8%, p = 0.211). Mean glomerular filtration rate (Cockcroft-Gault) was 63.6 +/- 20.7 mL/min/1.73 m(2) in the CsA-ME cohort and 65.9 +/- 23.1 mL/min/1.73 m(2) with tacrolimus (p = 0.285); mean serum creatinine was 139 +/- 58 and 133 +/- 57 mumol/L, respectively (p = 0.005). Blood pressure was similar between treatment groups at month 6, but total cholesterol, LDL-cholesterol and triglyceride levels were significantly higher with CsA than with tacrolimus (total cholesterol:HDL remained unchanged). The profile and incidence of adverse events were similar between treatments. The incidence of NODAT or IFG at 6 months post-transplant is significantly lower with CsA-ME than with tacrolimus without a significant difference in short-term outcome.
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Affiliation(s)
- F Vincenti
- University of California San Francisco Kidney Transplant Service, San Francisco, CA, USA.
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