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Polat C, Ayhan N, Ergünay K, Charrel RN. Comprehensive evaluation of nucleic acid amplification methods widely used for generic detection of sandfly-borne phleboviruses. Microbiol Spectr 2024; 12:e0342823. [PMID: 38456695 PMCID: PMC10986501 DOI: 10.1128/spectrum.03428-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Accepted: 02/13/2024] [Indexed: 03/09/2024] Open
Abstract
Sandfly-borne phleboviruses (SBPs), which cause sandfly fever, aseptic meningitis, encephalitis, and meningoencephalitis, are emerging pathogens of major public health concern. Virus nucleic acid testing is essential for SBP diagnosis, especially in the early stages of infection, and for the discovery of novel SBPs. The efficacy of utilizing generic primers that target conserved nucleotide sequences for the detection of both known and novel SBPs has not been extensively evaluated. We aimed to compare and evaluate the performance of five generic primer sets, widely used to detect S- and L-segments of arthropod-borne phleboviruses and designed as singleplex (n = 3) and nested (n = 2) formats, including both well-known and recently characterized 15 Old World virus strains. Furthermore, we performed in silico analysis to assess the detection capabilities of these generic primer sets. The initial evaluation of previously published generic primer sets for SBP detection yielded two singleplex primer sets with the potential to be adapted for use in real-time or high-throughput detection settings. Studies are ongoing to develop and further optimize a preliminary assay and test various hosts and vectors to assess their capacity to detect known and novel viruses. IMPORTANCE Virus nucleic acid testing is the primary diagnostic method, particularly in the early stages of illness. Virus-specific or syndromic tests are widely used for this purpose. The use of generic primers has had a considerable impact on the discovery, identification, and detection of Old World sandfly-borne phleboviruses (OWSBP). The study is significant because it is the first to carry out a comparative evaluation of all published OWSBP generic primer sets.
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Affiliation(s)
- Ceylan Polat
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
- Unité des Virus Emergents, Aix Marseille University, Marseille, France
| | - Nazli Ayhan
- Unité des Virus Emergents, Aix Marseille University, Marseille, France
- National Reference Center for Arboviruses, National Institute of Health, and Medical Research (Inserm) and French Armed Forces Biomedical Research Institute (IRBA), Marseille, France
| | - Koray Ergünay
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
- Walter Reed Biosystematics Unit (WRBU), Smithsonian Institution Museum Support Center, Suitland, Maryland, USA
- One Health Branch, Walter Reed Army Institute of Research (WRAIR), Silver Spring, Maryland, USA
- Department of Entomology, Smithsonian Institution-National Museum of Natural History (NMNH), Washington, DC, USA
| | - Remi N. Charrel
- Unité des Virus Emergents, Aix Marseille University, Marseille, France
- Laboratoire des Infections Virales Aigues et Tropicales, Pole des Maladies Infectieuses, AP-HM Hopitaux Universitaires de Marseille, Marseille, France
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Erdin M, Polat C, Smura T, Irmak S, Cetintas O, Cogal M, Colak F, Karatas A, Sozen M, Matur F, Vapalahti O, Sironen T, Oktem IMA. Phylogenetic Characterization of Orthohantavirus dobravaense (Dobrava Virus). Emerg Infect Dis 2024; 30:779-782. [PMID: 38526228 PMCID: PMC10977844 DOI: 10.3201/eid3004.230912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024] Open
Abstract
We report complete coding sequences of Orthohantavirus dobravaense (Dobrava virus) Igneada strains and phylogenetic characterization of all available complete coding sequences. Our analyses suggested separation of host-dependent lineages, followed by geographic clustering. Surveillance of orthohantaviruses using complete genomes would be useful for assessing public health threats from Dobrava virus.
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Polat C, Ayhan N, Saygan MB, Karahan S, Charrel R, Ergünay K. Comprehensive Cross-Sectional Evaluation of Human Sandfly-Borne Phlebovirus Exposure in an Endemic Region. Viruses 2023; 15:1902. [PMID: 37766308 PMCID: PMC10535931 DOI: 10.3390/v15091902] [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] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Revised: 09/06/2023] [Accepted: 09/07/2023] [Indexed: 09/29/2023] Open
Abstract
Sandfly-borne phleboviruses are endemic in countries around the Mediterranean Basin and pose a significant health threat for populations, with symptoms spanning from febrile diseases to central nervous system involvement. We carried out a comprehensive cross-sectional screening via microneutralization (MN) assays for a quantitative assessment of neutralizing antibodies (NAs) to seven phleboviruses representing three distinct serocomplexes, using samples previously screened via immunofluorescence assays (IFAs) in Turkey, an endemic region with various phleboviruses in circulation. We detected NAs to three phleboviruses: Toscana virus (TOSV), sandfly fever Naples virus (SFNV), and sandfly fever Sicilian virus (SFSV), while assays utilizing Adana virus, Punique virus, Massilia virus, and Zerdali virus remained negative. The most frequently observed virus exposure was due to TOSV, with a total prevalence of 22.6%, followed by SFNV (15.3%) and SFSV (12.1%). For each virus, IFA reactivity was significantly associated with NA detection, and further correlated with NA titers. TOSV and SFSV seroreactivities were co-detected, suggesting exposure to multiple pathogenic viruses presumably due to shared sandfly vectors. In 9.6% of the samples, multiple virus exposure was documented. In conclusion, our findings demonstrate widespread exposure to distinct pathogenic phleboviruses, for which diagnostic testing and serological screening efforts should be directed.
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Affiliation(s)
- Ceylan Polat
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara 06230, Turkey
- Unité des Virus Emergents, Aix Marseille University, IRD 190, INSERM U1207, 13005 Marseille, France
| | - Nazlı Ayhan
- Unité des Virus Emergents, Aix Marseille University, IRD 190, INSERM U1207, 13005 Marseille, France
- National Reference Center for Arboviruses, National Institute of Health and Medical Research (Inserm) and French Armed Forces Biomedical Research Institute (IRBA), 13005 Marseille, France
| | - Mehmet Bakır Saygan
- Middle Anatolia Regional Blood Center, Turkish Red Crescent Society, Ankara 06378, Turkey
| | - Sevilay Karahan
- Department of Biostatistics, Faculty of Medicine, Hacettepe University, Ankara 06230, Turkey
| | - Remi Charrel
- Unité des Virus Emergents, Aix Marseille University, IRD 190, INSERM U1207, 13005 Marseille, France
- Laboratoire des Infections Virales Aigues et Tropicales, Pole des Maladies Infectieuses, AP-HM Hopitaux Universitaires de Marseille, 13005 Marseille, France
| | - Koray Ergünay
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara 06230, Turkey
- Walter Reed Biosystematics Unit (WRBU), Smithsonian Institution Museum Support Center, Suitland, MD 20746, USA
- One Health Branch, Walter Reed Army Institute of Research (WRAIR), Silver Spring, MD 20910, USA
- Department of Entomology, Smithsonian Institution-National Museum of Natural History (NMNH), Washington, DC 20560, USA
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Durmuş ET, Atmaca A, Kefeli M, Çolak R, Durmuş B, Polat C. Clinical predictors of ectopic parathyroid adenomas: experience with 421 confirmed parathyroid adenoma localizations. J Endocrinol Invest 2022; 46:1197-1203. [PMID: 36510103 DOI: 10.1007/s40618-022-01986-1] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Accepted: 12/06/2022] [Indexed: 12/14/2022]
Abstract
PURPOSE This study was designed to evaluate whether patients with ectopic parathyroid adenoma (EPA) have clinical predictors by comparing them with other patients operated on for primary hyperparathyroidism (PHPT) with uniglandular parathyroid adenomas in other localizations. METHODS The data of PHPT patients who underwent parathyroidectomy in our institution were assessed retrospectively. Abnormal gland localization was confirmed by operative and pathology reports as well as normocalcemia that lasted for at least 6 months postoperatively. The relationships of biochemical and clinical findings of patients with confirmed adenoma localizations were analyzed. In order to determine independent factors that can predict EPAs, binary logistic regression was used. RESULTS Among 421 patients (83.4% female, mean age 49 ± 13.2 years) enrolled in the study, the most common adenoma localization was the lower left parathyroid gland (36.1%; p < 0.001). Parathyroid adenomas were more common in lower localizations compared to upper localizations and were smaller in size (p < 0.001 and p = 0.004, respectively). In univariate analysis, serum intact parathyroid hormone and calcium levels were found to be higher (p = 0.004 and p = 0.002, respectively), moderate/severe hypercalcemia was more common (p = 0.024), phosphorus levels were lower (p = 0.04), and postoperative transient hypocalcemia was more common (p = 0.013) in cases of EPAs than other localizations. There was no significant difference in adenoma size between EPAs and other classical localizations. In multivariate analysis, only a high serum calcium level was an independent predictor of EPAs (OR 2.017, 95% CI 1.142-3.564, p = 0.016). Receiver-operating characteristic curve analysis yielded an optimal cutoff value of 12.25 mg/dL for serum calcium (88% sensitivity, 63% specificity, and area under the curve: 0.861). CONCLUSION EPAs can cause a more biochemically distinct PHPT picture compared to parathyroid adenomas in classical localizations. A high calcium level at diagnosis may be a clinical predictor for EPAs and may affect the clinical approach and imaging technique choices. Due to the increased risk of transient hypocalcemia in patients with EPAs, caution should be exercised in postoperative follow-up. Furthermore, in the event of negative preoperative imaging, starting the parathyroid exploration from the lower left region may be a good option for the surgeon.
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Affiliation(s)
- E T Durmuş
- Faculty of Medicine, Department of Endocrinology and Metabolism, Ondokuz Mayis University, Samsun, Turkey.
| | - A Atmaca
- Faculty of Medicine, Department of Endocrinology and Metabolism, Ondokuz Mayis University, Samsun, Turkey
| | - M Kefeli
- Faculty of Medicine, Department of Pathology, Ondokuz Mayis University, Samsun, Turkey
| | - R Çolak
- Faculty of Medicine, Department of Endocrinology and Metabolism, Ondokuz Mayis University, Samsun, Turkey
| | - B Durmuş
- Faculty of Medicine, Department of Endocrinology and Metabolism, Ondokuz Mayis University, Samsun, Turkey
| | - C Polat
- Faculty of Medicine, Department of General Surgery, Amasya University, Amasya, Turkey
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Gökahmetoğlu S, Polat C, Atalay MA, Sezgin GC, Ergör G, Aygen B, Gürsoy Ş, Hakan Abacıoğlu Y, Abacioglu YH. Healthcare-Related HCV Genotype 4d Infections in Kayseri, Turkey. Turk J Gastroenterol 2022; 33:964-970. [PMID: 36098364 PMCID: PMC9797710 DOI: 10.5152/tjg.2022.21822] [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] [Figures] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
BACKGROUND The frequency of genotype 4 hepatitis C virus infection is significantly higher in a city compared to other provinces in Turkey. In this study, we aimed to investigate the epidemiology and risk factors of hepatitis C virus genotype 4 infection in Kayseri province of Turkey. METHODS A case-control study was conducted with 61 hepatitis C virus genotype 4-infected patients and 71 controls. A questionnaire was administered to the patients and controls, asking for information about the risk factors of hepatitis C virus transmission. Core/ E1 and NS5B regions of hepatitis C virus genome were amplified and sequenced by Sanger method. Phylogenetic analysis and molecular clock analysis were performed. The risk was determined by calculating the odds ratio and 95% CI. Logistic regression analysis was performed to determine the effect of risk factors by controlling for confounding variables. RESULTS Kayseri isolates were closely related to type 4d sequences but formed a separate cluster. According to the molecular clock analysis, hepatitis C virus genotype 4d entered Kayseri province probably between 1941 and 1988. Blood transfusion and surgical intervention were found to be significant risk factors for the infection. CONCLUSION Epidemiological data showed that hepatitis C virus genotype 4d infections are significantly associated with unsafe medical procedures.
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Affiliation(s)
- Selma Gökahmetoğlu
- Department of Medical Microbiology, Erciyes University Faculty of Medicine, Kayseri, Turkey,Corresponding author: Selma Gökahmetoğlu, e-mail:
| | - Ceylan Polat
- Department of Medical Microbiology, Hacettepe University Faculty of Medicine, Ankara, Turkey
| | - Mustafa Altay Atalay
- Department of Medical Microbiology, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Gülten Can Sezgin
- Department of Gastroenterology, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Gül Ergör
- Department of Public Health, Dokuz Eylül University Faculty of Medicine, İzmir, Izmir, Turkey
| | - Bilgehan Aygen
- Department of Infectious Diseases, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Şebnem Gürsoy
- Department of Gastroenterology, Erciyes University Faculty of Medicine, Kayseri, Turkey
| | - Yusuf Hakan Abacıoğlu
- Department of Medical Microbiology, İzmir University of Economics Faculty of Medicine, İzmir, Turkey
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Dinçer E, Timurkan MÖ, Oğuz B, Şahindokuyucu İ, Şahan A, Ekinci M, Polat C, Ergünay K. Several Tick-Borne Pathogenic Viruses in Circulation in Anatolia, Turkey. Vector Borne Zoonotic Dis 2022; 22:148-158. [PMID: 35133905 DOI: 10.1089/vbz.2021.0082] [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] [Indexed: 01/25/2023] Open
Abstract
Introduction: We screened host-collected ticks for tick-borne viruses, including those recently documented as human pathogens. Methods: During 2020-2021, ticks removed form cattle, sheep, dogs, and cats in 11 provinces in 5 geographically distinct regions of Anatolia were identified, pooled, and screened using pan-nairovirus, pan-flavivirus and individual assays for Jingmen tick virus (JMTV), and Tacheng tick virus 1 and 2 (TcTV-1 and TcTV-2). Results: A total of 901 tick specimens, comprising 6 species were included. Rhipicephalus sanguineus complex was the most abundant species (44.1%), followed by Rhipicephalus bursa (38.3%), Haemaphysalis parva (7.2%), and others. The specimens were screened in 158 pools with 12 pools (7.6%) being positive. Crimean-Congo hemorrhagic fever virus (CCHFV) lineage Europe 2 (genotype VI) sequences were detected in R. bursa in five (3.2%) of the pools, with similar prevalences in central and Mediterranean Anatolian provinces. JMTV was identified in four R. bursa and one Rhipicephalus turanicus pools, collected from Mediterranean and southeastern Anatolia, with a CCHFV and JMTV coinfected R. bursa pool. The JMTV segment 1 sequences formed a separate cluster with those from Turkey and the Balkan peninsula in the maximum likelihood analysis. TcTV-2 was detected in two Dermacentor marginatus specimens (1.3%) collected in central Anatolia, with nucleocapsid sequences forming a phylogenetically segregated group among viruses from humans and ticks from China and Kazakhstan. Discussion: CCHFV Europe 2 was initially documented in ticks from central Anatolian locations, where related orthonairoviruses had been previously recorded. Ongoing activity and a wider distribution of JMTV and TcTV-2 were observed. These viruses should be screened as potential etiological agents in human infections associated with tick bites.
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Affiliation(s)
- Ender Dinçer
- Department of Virology, Faculty of Veterinary Medicine, Dokuz Eylül University, İzmir, Turkey
| | - Mehmet Özkan Timurkan
- Department of Virology, Faculty of Veterinary Medicine, Atatürk University, Erzurum, Turkey
| | - Bekir Oğuz
- Department of Parasitology, Faculty of Veterinary Medicine, Van Yuzuncu Yil University, Van, Turkey
| | - İsmail Şahindokuyucu
- Bornova Veterinary Control Institute, Veterinary Control Institute Directorates, Ministry of Agriculture and Forestry, Izmir, Turkey
| | - Adem Şahan
- Department of Internal Medicine, Faculty of Veterinary Medicine, Harran University, Şanlıurfa, Turkey
| | - Mustafa Ekinci
- Department of Animal Breeding, Faculty of Veterinary Medicine, Erciyes University, Kayseri, Turkey
| | - Ceylan Polat
- Virology Unit, Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
| | - Koray Ergünay
- Virology Unit, Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey
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Abstract
The host immunity is crucial in determining the clinical course and prognosis of coronavirus disease 2019, where some systemic and severe manifestations are associated with excessive or suboptimal responses. Several antigenic epitopes in spike, nucleocapsid and membrane proteins of severe acute respiratory syndrome coronavirus 2 are targeted by the immune system, and a robust response with innate and adaptive components develops in infected individuals. High titer neutralizing antibodies and a balanced T cell response appears to constitute the optimal immune response to severe acute respiratory syndrome coronavirus 2, where innate and mucosal defenses also contribute significantly. Following exposure, immunological memory seems to develop and be maintained for substantial periods. Here, we provide an overview of the main aspects in antiviral immunity involving innate and adaptive responses with insights into virus structure, individual variations pertaining to disease severity as well as long-term protective immunity expected to be attained by vaccination.
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Affiliation(s)
- Ceylan Polat
- Department of Medical Microbiology, Hacettepe University Faculty of Medicine, Ankara 06100, Turkey
| | - Koray Ergunay
- Department of Medical Microbiology, Hacettepe University Faculty of Medicine, Ankara 06100, Turkey
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Polat C, Çelebi B, Irmak S, Karataş A, Çolak F, Matur F, Sözen M, Öktem IMA. Characterization of Bartonella taylorii Strains in Small Mammals of the Turkish Thrace. Ecohealth 2020; 17:477-486. [PMID: 33788082 DOI: 10.1007/s10393-021-01518-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 04/08/2020] [Revised: 11/26/2020] [Accepted: 01/15/2021] [Indexed: 06/12/2023]
Abstract
Rodents play role as a reservoir for some Bartonella species which cause different clinical manifestations in humans. Bartonella spp. existence in rodents of Turkish Thrace has been detected for the first time, and the risky habitat types were evaluated for the infection. Ninety individuals belonging to three small rodent species were screened by PCR, and the overall prevalence of Bartonella infection was 22.2%. The strains were characterized molecularly based on the phylogenetic analyses of two housekeeping genes, rpoB and gltA. They clustered with B. taylorii. The significant effects of habitat types and rodent species on Bartonella infections were observed. It was detected that B. taylorii prevalence was the highest in the swamp forest habitat and A. flavicollis species. The present study demonstrates that A. flavicollis is the reservoir of B. taylorii in the European part of Turkey.
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Affiliation(s)
- Ceylan Polat
- Department of Medical Microbiology, Faculty of Medicine, Hacettepe University, Ankara, Turkey.
| | - Bekir Çelebi
- Department of Zoonotic and Vector Disease, General Directorate of Public Health, Republic of Turkey Ministry of Health, Ankara, Turkey
| | - Sercan Irmak
- Science and Technology Application and Research Center, Balıkesir University, Balıkesir, Turkey
| | - Ahmet Karataş
- Department of Biology, Faculty of Arts and Sciences, Niğde Ömer Halisdemir University, Niğde, Turkey
| | - Faruk Çolak
- Department of Biology, Faculty of Arts and Sciences, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
| | - Ferhat Matur
- Department of Biology, Faculty of Science, Dokuz Eylul University, Izmir, Turkey
| | - Mustafa Sözen
- Department of Biology, Faculty of Arts and Sciences, Zonguldak Bülent Ecevit University, Zonguldak, Turkey
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Ergünay K, Polat C, Özkul A. Vector-borne viruses in Turkey: A systematic review and bibliography. Antiviral Res 2020; 183:104934. [PMID: 32949637 DOI: 10.1016/j.antiviral.2020.104934] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2020] [Revised: 09/09/2020] [Accepted: 09/11/2020] [Indexed: 11/25/2022]
Abstract
Turkey serves as a natural hub for the dissemination of vector-borne viruses and provides many suitable habitats with diverse ecologies for introduction and establishment of new pathogens. This manuscript provides an updated systematic review and meta-analysis of the vector-borne viruses documented in Turkey. Following web-based identification, screening and eligibility evaluation, 291 published reports were reviewed. The publications were categorized and listed as a supplementary bibliography accompanying the manuscript. In brief, Crimean-Congo hemorrhagic fever virus (CCHFV) and West Nile virus (WNV) are currently documented as prominent tick and mosquito-borne viral pathogens in Turkey. CCHFV produces a significant number of infections annually, with severe outcome or death in a portion of cases. WNV gained attention following the clustering of cases in 2010. Exposure and infections with sandfly-borne phleboviruses, such as Toscana virus, are indigenous and widespread. Epidemiology, risk factors, symptomatic infections in susceptible hosts, vectors and reservoirs for these pathogens have been explored in detail. Detection of novel viruses in mosquitoes, sandflies and ticks from several regions is of particular interest, despite scarce information on their epidemiology and pathogenicity in vertebrates. Introduction and emergence of viruses transmitted by invasive Aedes mosquitoes constitute a threat, albeit only imported infections have so far been documented. Detection of Rift valley fever virus exposure is also of concern, due to its detrimental effects on livestock and spillover infections in humans. Vigilance to identify and diagnose probable cases as well as vector surveillance for established and potential pathogens is therefore, imperative.
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Affiliation(s)
- Koray Ergünay
- Hacettepe University, Faculty of Medicine, Department of Medical Microbiology, Virology Unit, Ankara, 06100, Turkey.
| | - Ceylan Polat
- Hacettepe University, Faculty of Medicine, Department of Medical Microbiology, Virology Unit, Ankara, 06100, Turkey
| | - Aykut Özkul
- Ankara University, Faculty of Veterinary Medicine, Department of Virology, Ankara, 06110, Turkey
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Polat C, Oner BS. Sabuncuzade Serefeddin on the cover page of CMI. Clin Microbiol Infect 2020; 26:1562-1563. [PMID: 32437954 DOI: 10.1016/j.cmi.2020.04.045] [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] [Received: 04/22/2020] [Revised: 04/29/2020] [Accepted: 04/29/2020] [Indexed: 11/26/2022]
Affiliation(s)
- C Polat
- Department of Surgery, Amasya University, Medical Faculty, Amasya, Turkey.
| | - B S Oner
- Department of Forensic Medicine, Amasya University, Medical Faculty, Amasya, Turkey
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Polat C, Ergin Ç, Akkaya Y, Ali Oktem IM. Investigation of Orthohantavirus Seroprevalence in Northern Rural Areas of Denizli Province, Turkey. Jpn J Infect Dis 2020; 73:201-204. [PMID: 31875606 DOI: 10.7883/yoken.jjid.2019.330] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Orthohantaviruses infect humans via inhalation of the viral particles in the excreta of infected rodents or direct contact with infected rodents. The infections caused by Puumala orthohantavirus (PUUV) and Dobrava-Belgrade orthohantavirus (DOBV) have been reported in Turkey. Serum samples of 346 healthy volunteers who are in the high-risk group of Orthohantavirus infections among the residents of Çal, Baklan, Çivril, and Bekilli counties, located in the northeast part of Denizli province, were used in this study. The samples were screened and confirmed using commercial ELISA and immunoblot tests, which detect IgG antibodies against DOBV, PUUV, and Hantaan orthohantavirus. IgG antibodies against PUUV were detected in the samples of 2 volunteers (2/346, 0.6%). One was a veterinarian and the other a farmer and they live in the Baklan and Çal counties, respectively. Both of them have a high probability of exposure to the virus, based on their occupation and living conditions. However, no symptoms were found in the clinical findings of both cases. This study is the first publication of reported PUUV seropositivities from the southwestern part of Turkey.
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Affiliation(s)
- Ceylan Polat
- Department of Medical Microbiology, Faculty of Medicine, Dokuz Eylul University
| | - Çağrı Ergin
- Department of Medical Microbiology, Faculty of Medicine, Pamukkale University
| | - Yüksel Akkaya
- Public Health Laboratory, Denizli Public Health Directorate, Republic of Turkey Ministry of Health
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Polat C, Ergünay K, Irmak S, Erdin M, Brinkmann A, Çetintaş O, Çoğal M, Sözen M, Matur F, Nitsche A, Öktem İMA. A novel genetic lineage of Tula orthohantavirus in Altai voles (Microtus obscurus) from Turkey. Infect Genet Evol 2018; 67:150-158. [PMID: 30465911 DOI: 10.1016/j.meegid.2018.11.015] [Citation(s) in RCA: 6] [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] [Subscribe] [Scholar Register] [Received: 09/24/2018] [Revised: 11/16/2018] [Accepted: 11/16/2018] [Indexed: 01/10/2023]
Abstract
Orthohantaviruses (family Hantaviridae order Bunyavirales) are emerging pathogens with a significant impact on human health. They are transmitted via aerosolized excreta of rodents which also act as reservoir hosts, constituting a unique route for dispersion. Dobrava-Belgrade and Puumala orthohantaviruses have been previously reported from Anatolia, in rodents, case reports and occasional outbreaks. We have collected rodents at several locations during a surveillance study in eastern Anatolia. The specimens were morphologically-identified and various tissues were screened via a generic orthohantavirus reverse transcription polymerase chain reaction assay. DNA barcoding via mitochondrial cytochrome b sequencing was performed in rodents with detectable orthohantavirus sequences. High throughput sequencing was performed for viral genome characterization. Fifty rodents were collected and identified morphologically as Microtus spp. (96%) and Apodemus spp. (4%). Orthohantavirus sequences were detected in lung and spleen or liver tissues of 4 voles (8%), barcoded as Microtus obscurus. The virus sequences were identified as Tula orthohantavirus (TULV) and near-complete genomic segments of the prototype viral genome, tentatively named as the Tula orthohantavirus-Turkey (TULV-T), could be characterized. Putative open reading frames for viral nucleocapsid and a nonstructural protein on the S segment, glycoproteins G1 and G2 on the M segment and viral replicase on the L segment were identified on the TULV-T. Several minor sequence variants were further characterized. No evidence of recombination could be detected and pairwise comparisons displayed over 95% amino acid sequence identities to various Eurasian TULV strains. Phylogenetic analyses revealed distinct clustering of all genome segments from previously-characterized TULV strains via various approaches and models. Here, TULV-T constituted a novel lineage, forming an intermediate among Asian and European TULV lineages. This report describes the initial documentation of TULV circulation and its potential reservoir in Anatolia. The extent of virus dispersion, alternate hosts or outcomes of human exposure require elucidation.
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Affiliation(s)
- Ceylan Polat
- Dokuz Eylul University, Faculty of Medicine, Department of Medical Microbiology, 35340 Izmir, Turkey
| | - Koray Ergünay
- Hacettepe University, Faculty of Sciences, Department of Biology, Division of Ecology, Ankara, Turkey.
| | - Sercan Irmak
- Balıkesir University, Science and Technology Application and Research Center, Balıkesir, Turkey
| | - Mert Erdin
- Dokuz Eylul University, Faculty of Medicine, Department of Medical Microbiology, 35340 Izmir, Turkey
| | - Annika Brinkmann
- Robert Koch Institute; Centre for Biological Threats and Special Pathogens 1 (ZBS 1), Berlin, Germany
| | - Ortaç Çetintaş
- Bülent Ecevit University, Faculty of Arts and Sciences, Department of Biology, Zonguldak, Turkey
| | - Muhsin Çoğal
- Bülent Ecevit University, Faculty of Arts and Sciences, Department of Biology, Zonguldak, Turkey
| | - Mustafa Sözen
- Bülent Ecevit University, Faculty of Arts and Sciences, Department of Biology, Zonguldak, Turkey
| | - Ferhat Matur
- Dokuz Eylul University, Faculty of Science, Department of Biology, Izmir, Turkey
| | - Andreas Nitsche
- Robert Koch Institute; Centre for Biological Threats and Special Pathogens 1 (ZBS 1), Berlin, Germany
| | - İbrahim Mehmet Ali Öktem
- Dokuz Eylul University, Faculty of Medicine, Department of Medical Microbiology, 35340 Izmir, Turkey
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Brinkmann A, Dinçer E, Polat C, Hekimoğlu O, Hacıoğlu S, Földes K, Özkul A, Öktem İMA, Nitsche A, Ergünay K. A metagenomic survey identifies Tamdy orthonairovirus as well as divergent phlebo-, rhabdo-, chu- and flavi-like viruses in Anatolia, Turkey. Ticks Tick Borne Dis 2018; 9:1173-1183. [PMID: 29728337 DOI: 10.1016/j.ttbdis.2018.04.017] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [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: 01/11/2018] [Revised: 04/23/2018] [Accepted: 04/23/2018] [Indexed: 11/29/2022]
Abstract
We employed a direct metagenomic approach via next-generation sequencing for a cross-sectional investigation of viruses in 10 tick pools, collected from Aegean, Mediterranean and central Anatolian locations in Turkey. Sequences from all genome segments of Tamdy orthonairovirus (family Nairoviridae) were characterized in ticks collected from a Meriones tristrami. We further obtained near-complete L and partial S segments of several tick-associated phleboviruses (family Phenuiviridae), including Tacheng tick virus 2 and a novel virus, tentatively named as the tick phlebovirus Anatolia. Partial NS5-coding region of recently-described flavi-like virus (Tacheng tick virus 8) was further detected. Moreover, near-complete and polymerase-coding regions of arthropod-associated rhabdoviruses as well as sequences closely-related to the members of the newly-proposed virus family, the Chuviridae, were characterized. Despite origins of the viral sequences could not be fully elucidated, the findings suggest the circulation of diverse arthropod and tick-associated viruses in Anatolia. Occurrence and outcome of vertebrate exposure and probable health impact of these viruses require further investigation. We also report the initial detection of Tamdy orthonairovirus, an established human pathogen, which should be included in the diagnostic workup of infections with unknown etiology.
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Affiliation(s)
- Annika Brinkmann
- Robert Koch Institute, Center for Biological Threats and Special Pathogens 1 (ZBS-1), 13353, Berlin, Germany
| | - Ender Dinçer
- Mersin University, Advanced Technology Education, Research and Application Center, 33110, Mersin, Turkey
| | - Ceylan Polat
- Dokuz Eylul University, Faculty of Medicine, Department of Medical Microbiology, 35340, Izmir, Turkey
| | - Olcay Hekimoğlu
- Hacettepe University, Faculty of Science, Department of Biology, Division of Ecology, 06800, Ankara, Turkey
| | - Sabri Hacıoğlu
- Ankara University, Faculty of Veterinary Medicine, Department of Virology, 06110, Ankara, Turkey
| | - Katalin Földes
- Ankara University, Faculty of Veterinary Medicine, Department of Virology, 06110, Ankara, Turkey
| | - Aykut Özkul
- Ankara University, Faculty of Veterinary Medicine, Department of Virology, 06110, Ankara, Turkey
| | - İbrahim Mehmet Ali Öktem
- Dokuz Eylul University, Faculty of Medicine, Department of Medical Microbiology, 35340, Izmir, Turkey
| | - Andreas Nitsche
- Robert Koch Institute, Center for Biological Threats and Special Pathogens 1 (ZBS-1), 13353, Berlin, Germany
| | - Koray Ergünay
- Robert Koch Institute, Center for Biological Threats and Special Pathogens 1 (ZBS-1), 13353, Berlin, Germany; Hacettepe University, Faculty of Medicine, Department of Medical Microbiology, Virology Unit, 06100, Ankara, Turkey.
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Polat C, Sironen T, Plyusnina A, Karatas A, Sozen M, Matur F, Vapalahti O, Oktem IMA, Plyusnin A. Dobrava hantavirus variants found in
Apodemus flavicollis
mice in Kırklareli Province, Turkey. J Med Virol 2018; 90:810-818. [DOI: 10.1002/jmv.25036] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2017] [Accepted: 01/10/2018] [Indexed: 12/22/2022]
Affiliation(s)
- Ceylan Polat
- Department of Medical Microbiology, Medical SchoolDokuz Eylül UniversityIzmirTurkey
| | - Tarja Sironen
- Department of VirologyUniversity of HelsinkiHelsinkiFinland
| | | | - Ahmet Karatas
- Department of Biology, Faculty of Arts and SciencesÖmer Halisdemir UniversityNiğdeTurkey
| | - Mustafa Sozen
- Department of Biology, Faculty of Arts and SciencesBülent Ecevit UniversityZonguldakTurkey
| | - Ferhat Matur
- Department of Biology, Faculty of Arts and SciencesBülent Ecevit UniversityZonguldakTurkey
| | - Olli Vapalahti
- Department of VirologyUniversity of HelsinkiHelsinkiFinland
| | - I. Mehmet Ali Oktem
- Department of Medical Microbiology, Medical SchoolDokuz Eylül UniversityIzmirTurkey
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Polat C, Karataş A, Sözen M, Matur F, Abacıoğlu H, Öktem MA. [Optimization of ELISA and immunoblot methods for the detection of IgG antibodies against old world hantaviruses in wild rodents]. MIKROBIYOL BUL 2016; 50:245-55. [PMID: 27175497 DOI: 10.5578/mb.23161] [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: 11/15/2022]
Abstract
Hantaviruses infect humans via inhalation of viral particles in infected rodents' secretions such as saliva, urine and faeces or via direct contact with infected rodents. The rodent species that are known as the carriers of Dobrava (DOBV), Puumala (PUUV), Saaremaa (SAAV), Tula (TULV) and Seoul (SEOV) viruses are found in our country. The presence of specific antibodies against hantaviruses have been demonstrated in rodents collected from Black Sea and Aegean Regions of Turkey in 2004 for the first time. The first hantavirus-related hemorrhagic fever with renal syndrome (HFRS) cases were reported in Black Sea region in 2009. The determination of the hantavirus prevalence in wild life and rodent populations in the field is crucial for the information about hantavirus-related cases and to clarify the state of risk. There is no commercial product optimized for the screening of rodent serum samples in terms of HFRS agents like DOBV and PUUV that are widely seen in Eurasia as well as Turkey. In this study, the antigens belonging to the commercial enzyme-linked immunoassay (ELISA) and immunoblot tests that are produced for the screening of human sera were used for the development of antibody screening tests against hantavirus in rodent sera and were optimized. The most appropriate serum and conjugate dilutions were determined for the optimization of ELISA (Anti-Hantavirus Pool ELISA; Euroimmun, Germany) and immunoblot (Euroline Anti-Hanta Profile 1 strips; Euroimmun, Germany) methods. Optimized ELISA method was used for the screening and optimized immunoblot method was used for the confirmation. A total of 84 wild rodent sera that belonged to Apodemus and Microtus species were evaluated with this procedure and the cut-off value, sensitivity and specificity of optimized ELISA method were determined. For the optimization of ELISA 1/50, 1/100 and 1/200 serum dilutions and 1/10.000, 1/20.000 and 1/40.000 conjugate dilutions were tested. For the optimization of immunoblot, 1/50 and 1/100 serum dilutions and 1/5.000 and 1/10.000 conjugate dilutions were tested. The horseradish peroxidase conjugated goat anti-mouse IgG for ELISA and the alkaline phosphatase conjugated goat anti-mouse IgG for immunoblot were used. We followed the manufacturer's recommendations for the incubation parameters, substrate and the number of washes. 1/50 serum dilution and 1/10.000 conjugate dilution for ELISA and 1/100 serum dilution and 1/5.000 conjugate dilution for immunoblot were determined as optimal concentrations. By using the optimized ELISA, 26.2% (22/84) of rodents were found positive for hantavirus antibodies according the determined cut-off value (OD(450/620): 0.325). By using immunoblot as a confirmatory test, 20 out of 22 ELISA positive samples could be studied because of the insufficient amount of sera and 17 of them was found positive in terms of DOBV antibodies. Of these rodents 11 were Apodemus flavicollis, three were Apodemus agrarius, two were Microtus guentheri and one was Apodemus sylvaticus. When the results of ELISA were compared to immunoblot results, the optimized ELISA's sensitivity and specificity were found as 100% and 95%, respectively. In this study, a method that can be used in the screening of rodent sera was constituted which uses commercial antigens that can be provided easily, gives fast and reliable results. Similar serological methods optimized for different types of rodents are of great importance for the realization of active follow-up and monitoring of the studies in the field.
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Affiliation(s)
| | | | | | | | | | - Mehmet Ali Öktem
- Dokuz Eylül University Faculty of Medicine, Department of Medical Microbiology, Izmir, Turkey.
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Abstract
BACKGROUND/AIM The frequency of genotype 4 hepatitis C virus (HCV) infections is significantly higher in Kayseri compared to other provinces in Turkey. We aimed to characterize genotype 4 infections in Kayseri by analyzing the demographic and laboratory data of218 HCV RNA-positive, treatment-naive patients admitted to the Kayseri Training and Research Hospital in 2010 and 2011. MATERIALS AND METHODS The distributions of sex, age, and viral loads of these patients with respect to HCV genotypes were analyzed. We also characterized the type 4 sequences at the subtype level. Randomly selected sera from 32 of the 72 genotype 4 patients from this cohort were subjected to PCR amplification in the NS5B region and further characterized by sequencing and phylogenetic and molecular clock analysis. RESULTS Distribution rates of HCV genotypes 1, 4, and 2 in the 218 patients were 62.4%, 33.0%, and 4.6%, respectively. Most of the patients infected with types 1 and 4 were over the age of 40 and female. The NS5B sequences of 32 Kayseri genotype 4 isolates were closely related with type 4d sequences but formed a separate cluster. CONCLUSION The introduction of type 4d HCV into the Kayseri region probably took place 30-75 years ago, as predicted by molecular clock analysis.
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Çakır T, Polat C, Baştürk A, Gül M, Aslaner A, Durgut H, Şehirli AÖ, Aykaç A, Bahar L, Sabuncuoglu MZ. The effect of alpha lipoic acid on rat kidneys in methotrexate induced oxidative injury. Eur Rev Med Pharmacol Sci 2015; 19:2132-2139. [PMID: 26125279] [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: 06/04/2023]
Abstract
OBJECTIVE The purpose of this study is to determine the antioxidant and anti-inflammatory effects of alpha lipoic acid (ALA) on methotrexate (MTX) induced kidney injury in rats. MATERIALS AND METHODS Thirty-two rats were equally divided into four groups; control, ALA, MTX and MTX with ALA groups. A single dose of MTX (20 mg/kg) was administered to make kidney injury to groups 3 and 4, intraperitoneally. The ALA was administered intraperitonealy in groups 2 and 4 and the other groups received saline injection for five days. On the sixth day the blood samples and kidney tissues were obtained for the measurement of TNF-α, IL-1β, malondialdehyde, glutathione, myeloperoxidase and sodium potassium-adenosine triphosphatase levels and histological examination. RESULTS Administration of MTX caused a decrease in tissue GSH, and Na+, K+-ATPase activity significantly. A significant increase in tissue MDA and MPO activities were also seen. The pro-inflammatory cytokines (TNF-α, IL-β) were increased in the MTX group significantly. ALA treatment reversed all biochemical indices as well as histopathological alterations induced by MTX administration. CONCLUSIONS MTX made oxidative damage on kidneys of rat and it was partially prevented by anti-inflammatory and antioxidant effects of ALA treatment.
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Affiliation(s)
- T Çakır
- Department of General Surgery, Antalya Training and Research Hospital, Antalya, Turkey.
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Yildirim M, Amanvermez R, Polat C, Karadag A, Karayigit MO, Erzurumlu K. The olive leaf extract attenuates bacterial translocation and liver damage in obstructive jaundice. ACTA ACUST UNITED AC 2014; 115:357-61. [PMID: 25023426 DOI: 10.4149/bll_2014_070] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
OBJECTIVES The olive leaf extract (OLext) is known to possess many biological properties including a powerful antioxidant. This study aimed to investigate the protective effects of postoperative nutrition with OLext and glutamine on bacterial translocation (BT) and liver damage in obstructive jaundice. MATERIALS AND METHODS Totally, 50 rats were randomly divided into the five groups of 10 each. The common bile duct was ligated in all animals, excepting in the group 1. Postoperative nutrition was given to all groups for ten days. The rats in the Group 1 and 2 were fed a normal diet, Group 3 rats were fed an additional glutamine (1 g/kg/day), and Group 4 and 5 rats were fed an additional OLext (1 ml of 1/2 diluted and pure form/kg/day). Biochemical, microbiological and liver histopathological changes were evaluated. RESULTS BT in the Groups 3, 4, and 5 was significantly lower than in the Group 2. The values of aspartate transaminase (AST), alanine transaminase (ALT), γ-glutamyl transferase (γ-GT) and alkalen phosphatase (ALP) in blood were increased in obstructive jaundice, but the levels of these tests were statistically lower in glutamine and OLext groups when compared to the Group 2. Histopathological changes were observed low in the liver in OLext and glutamine groups. CONCLUSIONS The present data has demonstrated that the supplementation of olive leaf extract and glutamine reduce the incidence of BT and liver damage in obstructive jaundiced rats (Tab. 4, Fig. 1, Ref. 23).
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Kosar NM, Tosun M, Polat C, Kahraman A, Arikan Y. Hepatocyte apoptotic index and p53 expression in obstructive jaundice rats. ACTA ACUST UNITED AC 2014; 115:352-6. [PMID: 25023425 DOI: 10.4149/bll_2014_069] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
OBJECTIVE Obstructive jaundice is a serious disease. It can deteriorate critical functions in the liver. MATERIAL AND METHOD A total of 20 male Wistar-Albino rats were randomly allocated into two groups consisting of ten in each as follows: Group I (Control) was subjected to a sham operation isolating the bile duct. Group II(Study) was subjected to acute cholestasis induced by bile duct ligation with 4/0 silk suture from two different places and full fold cut between ligatures. On the 7th day, group II rats were re-operated for liver sampling and sacrification-aimed histological analysis through the old incision with anaesthesia. Hepatic tissues were histologically and immunohistochemically processed. The number of apoptotic and p53(+) cells were measured. RESULTS On the 7th day, the averages of direct and indirect bilirubin values in Group II rats were found to be 6.99 and 11.70 mg/dl, respectively. They were observed to be statistically significant. In the immunohistochemical evaluation p53 expression in hepatocytes was assessed, p53-positive hepatocytes were determined to exist quite widely in the tissue samples taken from the livers of rats in the study group. Nevertheless, no cells exhibiting p53 expression were found in the tissue samples of the control group. CONCLUSION Apoptosis is a closed box and it might make it possible to stop the many disease processes or accelerate the healing. If the principal effective mechanism in the liver under a certain stress factor is apoptosis, it is definite that it will make a difference in the treatment approach. Consequently, we can say that both apoptotic index and p53 expression increase in the rats' liver with biliary obstruction (Fig. 4, Ref. 51).
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Demir M, Amanvermez R, Kamalı Polat A, Karabıçak İ, Çınar H, Kesicioğlu T, Polat C. The effect of silymarin on mesenteric ischemia-reperfusion injury. Med Princ Pract 2014; 23:140-4. [PMID: 24356575 PMCID: PMC5586953 DOI: 10.1159/000356860] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Accepted: 10/21/2013] [Indexed: 12/24/2022] Open
Abstract
OBJECTIVE To examine the effect of silymarin (SM), a mixture of flavonoids and polyphenols extracted from Silybum marianum, on mesenteric ischemia-reperfusion (I-R) injury in a rat model. MATERIALS AND METHODS Fifty rats were randomly divided into 5 groups (n = 10). Group 1 was sham operated, while groups 2-5 were subjected to mesenteric I-R lasting 1 h. Group 2 received isotonic sodium chloride, group 3 received SM (100 mg/kg/day) for 7 days before I-R, group 4 received SM for 7 days after I-R, and group 5 received SM for 7 days both before and after I-R. The rats were sacrificed by exsanguination in groups 1-3 at the 24th hour and groups 4 and 5 were sacrificed on the 7th day of reperfusion. Blood and intestinal specimens were taken for biochemical and pathological evaluations. RESULTS Serum superoxide dismutase (SOD) and heat shock protein 70 levels were significantly higher in group 2 (5.24 ± 1.76 U/l and 261.4 ± 16.8 ng/ml) compared to the sham group (2.08 ± 1.76 U/l and 189.9 ± 28.7 ng/ml) (p < 0.001 and p < 0.0001, respectively). However, SOD activity and the extent and severity of the histopathological lesions were significantly less in groups 3 [3.11 ± 1.18 U/l, 1.0 (range 0.0-2.0)], 4 [2.15 ± 0.87 U/l, 1.0 (range 1.0-3.0)], and 5 [1.80 ± 0.61 U/l, 0.5 (range 0.0-2.0)], treated with SM, than in group 2 [5.24 ± 1.76 U/l, 2.0 (range 2.0-3.0)] (p = 0.002, p < 0.001, and p = 0.0001; p < 0.001, p = 0.007, and p = 0.0001, respectively). Also, TNF-α levels were lower in the SM-supplemented groups compared to group 2. Serum thiobarbituric acid-reactive substance concentrations were low in the pre-/posttreatment groups treated with SM compared to group 2. No statistical difference was observed for protein carbonyls between the groups. CONCLUSION Our findings suggest that SM therapy may attenuate the oxidative and intestinal damage induced by I-R injuries.
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Affiliation(s)
- M. Demir
- Department of General Surgery, Ondokuz Mayıs University, Samsun, Turkey
| | - R. Amanvermez
- Department of Medical Biochemistry, Faculty of Medicine, Ondokuz Mayıs University, Samsun, Turkey
- *Dr. Ramazan Amanvermez, Department of Medical Biochemistry, Faculty of Medicine, Ondokuz Mayıs University, TR-55139 Samsun (Turkey), E-Mail
| | - A. Kamalı Polat
- Department of General Surgery, Ondokuz Mayıs University, Samsun, Turkey
| | - İ. Karabıçak
- Department of General Surgery, Ondokuz Mayıs University, Samsun, Turkey
| | - H. Çınar
- Department of General Surgery, Ondokuz Mayıs University, Samsun, Turkey
| | - T. Kesicioğlu
- Department of General Surgery, Ondokuz Mayıs University, Samsun, Turkey
| | - C. Polat
- Department of General Surgery, Ondokuz Mayıs University, Samsun, Turkey
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Polat C, Celik V, Cerrah A. The evaluation of some overload training dynamics related with exercise dependance. J Sci Med Sport 2013. [DOI: 10.1016/j.jsams.2013.10.195] [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: 10/25/2022]
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Ciccozzi M, Zehender G, Polat C, Lai A, Kayman T, Sorrentino C, Ebranati E, Cella E, Lo Presti A, Abacioglu H. Phylogenetic analysis of HCV-4d in Turkey: the curious case of Kayseri province. J Med Virol 2013; 86:454-60. [PMID: 24132509 DOI: 10.1002/jmv.23787] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 09/05/2013] [Indexed: 12/23/2022]
Abstract
In Turkey, genotype 1, especially type 1b virus, causes approximately 90% of these infections, while types 2, 3, and 4 exist, albeit in low prevalences and are due to relatively recent and limited introductions. Two recent reports from Kayseri, a relatively large city in Central Anatolia, indicated unusually high prevalence for type 4 infections in the province reaching a 35% among patients admitted to hospitals for treatment of chronic hepatitis C. In this study, the origin, the demographic history, and the dynamic of the epidemic of unusual HCV genotype 4d in Turkey by using Bayesian coalescent-based method were investigated. A gene flow migration approach was also used to describe the synchronous geographical dispersal and genetic diversification of this unusual genotype in Kayseri province. The Turkish clade had a tMRCA of 44 years corresponding to the year 1967 and seems to have a different origin being completely segregated from the European one. Gene flow migration analysis indicated that Kayseri province appeared to be the epicenter of HCV-4d epidemic, exporting the infections. The demographic history of HCV-4d showed that the epidemic started in 1970s year then following a slow exponential growth until 1980s. The Turkish monophyletic clade suggests a segregate circulation of the epidemic in this region mostly due to unsafe parenteral medical procedures (with drug addiction playing a relatively negligible role).
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Affiliation(s)
- Massimo Ciccozzi
- Department of Infectious, Parasitic and Immunomediated Diseases, National Institute of Health, Rome, Italy
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23
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Can H, Caner A, Döşkaya M, Değirmenci A, Karaçalı S, Polat C, Gürüz Y, Uner A. Detection of Pneumocystis in the nasal swabs of immune-suppressed rats by use of PCR and microscopy. Med Sci Monit Basic Res 2013; 19:62-7. [PMID: 23403744 PMCID: PMC3638709 DOI: 10.12659/msmbr.883777] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
BACKGROUND Detection of Pneumocystis jiroveci colonization in lungs or oral samples due to high sensitivity of PCR methods results in undue treatment of patients without any symptoms of Pneumocystis pneumonia. The aim of the present study is to demonstrate Pneumocystis carinii in rats, immune suppressed by oral and subcutaneous administration of dexamethasone. MATERIAL/METHODS Blood, oral, nasal and eye swabs were collected prior to immune suppression and 2, 6, 12 weeks after administration of dexamethasone. Also, samples were collected from lung, heart, liver, kidney, diaphragm, brain, spleen, tongue, muscle, eye, intestine, and feces. Cysts and trophozoites were investigated in stained slides and MSG gene was detected by PCR. RESULTS The results showed that weight loss is significantly higher in rats administered oral dexamethasone (P<0.05). Microscopy was positive only in lungs of rats orally administered dexamethasone. PCR was positive in lungs and oral swabs of rats prior to the administration of dexamethasone. After the administration of dexamethasone, the MSG gene was detected in oral swabs, lungs, spleen, kidney and (for the first time) in nasal swabs. PCR was positive in nasal swabs during the second and sixth weeks of oral and subcutaneous administration of dexamethasone, respectively. CONCLUSIONS Presence of P. jiroveci in nasopharyngeal aspirate, oropharyngeal wash, oral swab, induced sputum or BAL, and absence in nasal swab in a patient without symptoms of PCP may support clinician's decision regarding colonization. Overall, detection of P. carinii in nasal swabs of rats by PCR demonstrated that nasal sampling can be used for the diagnosis of Pneumocystis pneumonia.
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Affiliation(s)
- Hüseyin Can
- Ege University Medical School, Department of Parasitology, Bornova/Izmir, Turkey
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Gungor B, Polat AK, Polat C, Seren D, Erzurumlu K. Do the calcifications in the thyroid gland predict malignancy? ACTA ACUST UNITED AC 2012; 113:552-5. [PMID: 22979912 DOI: 10.4149/bll_2012_124] [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: 11/08/2022]
Abstract
BACKGROUND The purpose of this study was to determine the relationship between calcifications in the thyroid gland and malignant thyroid lesions. METHODS From June 2005 - May 2010, 169 patients, who had been operated on for thyroidectomy, were evaluated. The demographic findings were analyzed with regard to ultrasonographic and histopathologic calcifications. The relationship between calcifications and malignant and benign thyroid lesions was statistically determined by SPSS 10.01 version of Z-test and Chi-square test. RESULTS Microcalcifications were found in 54 patients (31.95 %). Macrocalcification was found in one patient (0.59 %).Malignancy was determined in 29 patients (17.16 %). The rate of malignancy in patients with calcifications was 17/55 (30.9 1%). The diagnosis was nodular colloidal goiter in 38 patients (38/55, 69.09 %) with calcifications. The rate of calcification in malignant patients was 17/29 (58.62 %). The rate of malignancy in patients without calcification was 12/114 (10.52 %). The difference between the rate of malignancy in patients with calcification and the rate of malignancy in patients without calcification was statistically significant (Z-test, p < 0.001). CONCLUSION Microcalcifications of the thyroid gland could predict malignant thyroid disease. They should be strictly evaluated by all thyroid cancer diagnostic modalities and surgical treatment should also be considered (Tab. 4, Ref. 29).
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Affiliation(s)
- B Gungor
- Department of General Surgery, Ondokuz Mayis University, Samsun, Turkey.
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Arioz DT, Tosun M, Polat C, Saylan A, Yilmazer M. The effects of ischaemic preconditioning on ovarian apoptosis and p53 expression during laparoscopy. J OBSTET GYNAECOL 2012; 32:467-71. [DOI: 10.3109/01443615.2012.663015] [Citation(s) in RCA: 4] [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: 11/13/2022]
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Ozyuksel A, Kocabeyoglu S, Cetin E, Polat C. PP-155: SURGICAL REVASCULARIZATION OF CHRONIC TOTAL LEFT MAIN CORONARY ARTERY OCCLUSION PRESENTING WITH STABLE ANGINA PECTORIS: CASE REPORT. Int J Cardiol 2011. [DOI: 10.1016/s0167-5273(11)70381-3] [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] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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27
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Polat C, Arikan Y, Gokce C, Aktepe F, Akbulut G, Yilmaz S, Gokce O. The effect of NG-nitro L-arginine methyl ester on colonic anastomosis after increased intra-abdominal pressure. Langenbecks Arch Surg 2006; 392:197-202. [PMID: 17031695 DOI: 10.1007/s00423-006-0088-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [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: 03/24/2006] [Accepted: 07/06/2006] [Indexed: 10/24/2022]
Abstract
BACKGROUND Intestinal ischemia-reperfusion (I/R) is associated with augmented nitric oxide (NO) production. Increased intra-abdominal pressure (IAP) during surgical pneumoperitoneum (P) facilitates I/R injury. We previously demonstrated decreased strength and healing of colocolic anastomoses after high IAPs. The effect of an NO synthase inhibitor, N (G)-nitro-arginine methyl ester (L: -NAME), on anastomoses realized in colonic tissue exposed to high IAPs was investigated in this study, a randomized, controlled, and experimental study with blind outcome assessment. METHOD Fifty Wistar-albino rats were randomized to five groups; all underwent colocolic anastomosis. P was maintained for 60 min at IAPs of 14, 20, 25, and 30 mmHg in study groups 1, 2, 3, and 4, respectively; P was preceded by intraperitoneal L: -NAME (2.5 mg/kg) and followed by anastomosis. The control group was not subjected to IAP or L: -NAME. RESULTS Anastomosis bursting pressure (ABP) values and histopathological findings were determined on the 7th-14th postoperative days. The ABPs of groups 3-4 were significantly lower than the others. Groups 1-2 had results similar to controls. Histopathological findings of the groups were consistent with their ABPs. CONCLUSION Administration of a 2.5-mg/kg intraperitoneal L: -NAME dose was found to provide a beneficial role, implying a role in impaired anastomotic healing after IAPs of 14 and 20 mmHg.
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Affiliation(s)
- C Polat
- Department of Surgery, Afyon Kocatepe University, Afyonkarahisar, Turkey.
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Tokyol C, Yilmaz S, Kahraman A, Cakar H, Polat C. The effects of desferrioxamine and quercetin on liver injury induced by hepatic ischaemia-reperfusion in rats. Acta Chir Belg 2006; 106:68-72. [PMID: 16612918 DOI: 10.1080/00015458.2006.11679837] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [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: 10/21/2022]
Abstract
BACKGROUND This study was designed to examine the effects of desferrioxamine and quercetin on hepatic ischaemia-reperfusion injury in rat. METHODOLOGY Thirty Wistar albino rats were randomized into five groups. Group I was the control group. Group II received no treatment. Group III and group IV received intramuscular injections of desferrioxamine (100 mg/kg per day) and quercetin (50 mg/kg per day) respectively. Group V was administered desferrioxamine and quercetin in combination. After treatment for 3 days, groups II, III, IV, and V were exposed to total hepatic ischaemia for 45 minutes. Plasma alanine aminotransferase levels, malondialdehyde and reduced glutathione activities were measured after reperfusion for 1 hour. Histopathological analysis of liver tissues was carried out. RESULTS Our results indicated that tissue malondialdehyde levels and histopathological liver damage scores were significantly higher in the ischaemia-reperfusion group than in the control group. Administration of desferrioxamine, quercetin, and desferrioxamine+quercetin significantly decreased these parameters. Plasma alanine aminotransferase levels were also increased after ischaemia-reperfusion. Quercetin and desferrioxamine + quercetin significantly decreased the activity of this enzyme when compared to ischaemia-reperfusion group. CONCLUSIONS The present data suggest that both desferrioxamine and quercetin may be useful to protect against ischaemia-reperfusion induced liver damage.
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Affiliation(s)
- C Tokyol
- Department of Pathology, Kocatepe University, Faculty of Medicine, Afyon, Turkey.
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Akbulut G, Polat C, Aktepe F, Yilmaz S, Kahraman A, Serteser M, G�k�e �, G�k�e �. The oxidative effect of prolonged CO2 pneumoperitoneum on renal tissue of rats. Surg Endosc 2004; 18:1384-8. [DOI: 10.1007/s00464-003-9114-9] [Citation(s) in RCA: 25] [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] [Received: 04/29/2003] [Accepted: 12/23/2003] [Indexed: 10/26/2022]
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Demirbas M, Guler C, Samli M, Köken T, Dincel C, Polat C. The effect of verapamil on the prevention of ischemia/reperfusion injury in the experimental retroperitoneoscopic donor nephrectomy model. Surg Endosc 2004; 18:1272-5. [PMID: 15457386 DOI: 10.1007/s00464-003-9145-2] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2003] [Accepted: 11/21/2003] [Indexed: 12/31/2022]
Abstract
BACKGROUND This study investigated the effect of intravenous administration of verapamil in prevention of the injury caused by free oxygen radicals generated in a rabbit retroperitoneoscopic donor nephrectomy model. METHODS Twenty-four adult New Zealand rabbits were divided into four groups. In group I, balloon dissection of the left retroperitoneal space was performed. In group II, CO2 at 10 mmHg was applied for 3 hours after the balloon dissection. In group III, laparotomy was performed, the left renal pedicle was clamped for 3 min, and the clamp was removed 5 min before nephrectomy. In group IV, 2 min before the attempt 0.2 mg/kg verapamil was given intravenously, and the same procedure was employed as in group III. Nephrectomy was performed after each experiment. The concentrations of malonyl dialdehyde (MDA), reduced glutathione (GSH), and protein carbonyl content were measured in renal tissue samples as markers of oxidative stress. RESULTS Pneumoretroperitoneum (Prp) promoted oxidative stress in renal tissues, with an increase of MDA and protein carbonyl content. The verapamil- pretreated group (group IV) showed statistical significantly lower values of MDA and protein carbonyl content when compared with group II and III (p < 0.05), whereas tissue GSH concentrations were unchanged in all groups. CONCLUSIONS Our study showed that Prp causes increased oxidative stress in renal tissue. Warm ischemia lasting 3 min did not exert an additive effect on Prp-associated oxidative stress. Verapamil reduces the oxidative stress markers caused by Prp.
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Affiliation(s)
- M Demirbas
- Department of Urology, Afyon Kocatepe University School of Medicine, Afyon, Turkey
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Cevrioglu AS, Polat C, Fenkci V, Yilmazer M, Yilmaz S, Dilek ON. Laparoscopic management following ultrasonographic-guided drainage in a patient with giant paraovarian cyst. Surg Endosc 2004; 18:346. [PMID: 15106626 DOI: 10.1007/s00464-003-4226-9] [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] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Giant and paraovarian cysts are unusual masses that are usually treated by laparotomy. The safety of laparoscopic management of benign paraovarian cysts has been demonstrated, but it is believed that the size of benign paraovarian cysts is a limiting factor for laparoscopic surgery. METHODS We describe a new technique for the laparoscopic removal of a giant and benign paraovarian cyst in a 40-year-old woman. A paraovarian cystic mass was detected on the right part of her body that extended to the liver. It was confirmed on both ultrasonography and computed tomography scans. After ultrasound-guided aspiration of the cyst, the mass was resected laparoscopically. RESULTS No complications were noted during or after the surgical procedure. The patient was discharged on postoperative day 2. CONCLUSIONS Laparoscopic surgery can be safely applied in patients with giant and benign paraovarian cysts.
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Affiliation(s)
- A S Cevrioglu
- Department of Obstetrics and Gynecology, Afyon Kocatepe University, School of Medicine, Afyon, Turkey
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Polat C, Yilmaz S, Arikan Y. Erratum: Mesentric cysts. Surg Endosc 2004. [DOI: 10.1007/s00464-003-0054-9] [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] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Malazgirt Z, Dervisoğlu A, Polat C, Guneren E, Guven H, Akpolat T. Preperitoneal mesh repair of spigelian hernias under local anesthesia: description and clinical evaluation of a new technique. Hernia 2003; 7:202-5. [PMID: 14505235 DOI: 10.1007/s10029-003-0153-x] [Citation(s) in RCA: 10] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2003] [Accepted: 05/05/2003] [Indexed: 10/26/2022]
Abstract
We report on a new method for the repair of spigelian hernia, in which we combined the step-by-step local anesthesia and open preperitoneal mesh repair techniques. After initial infiltration of local anesthetics, we incised the attenuated fascia and slightly enlarged the fascial defect to facilitate easy return of hernial content into the abdominal cavity. We injected preperitoneally, in a radial fashion around the peritoneal sac, more saline solution, consisting of 1:200,000 epinephrine (g:g) and 1/3 bupivacain (v:v). We dissected the peritoneum away from the anterior abdominal wall to create a preperitoneal pocket of sufficient size. We spread open a 9 x 9-cm polypropylene mesh in the area, as if we were doing a GPRVS of Stoppa. We followed up our four patients for an average of 32 months. All four cases had an uneventful recovery and were discharged in an average of 3.5 days. They returned to normal daily activity on the 9th day after surgery. We suggest that the preperitoneal mesh repair of a spigelian hernia under local anesthesia is a simple and feasible technique with favorable early and late postoperative results and deserves further investigation in larger series.
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Affiliation(s)
- Z Malazgirt
- Department of Surgery, Ondokuz Mayis University, Kurupelit, 55139 Samsun, Turkey.
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Polat C, Yilmaz S, Serteser M, Koken T, Kahraman A, Dilek ON. The effect of different intraabdominal pressures on lipid peroxidation and protein oxidation status during laparoscopic cholecystectomy. Surg Endosc 2003; 17:1719-22. [PMID: 12958684 DOI: 10.1007/s00464-002-9258-z] [Citation(s) in RCA: 58] [Impact Index Per Article: 2.8] [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: 12/02/2002] [Accepted: 04/09/2003] [Indexed: 10/26/2022]
Abstract
BACKGROUND This prospective, randomized, and controlled study was designed to investigate the effects of different intraabdominal pressures (IAPs) on lipid peroxidation and protein oxidation status during laparoscopic cholecystectomy (LC). METHODS Twenty-four patients (12 men, 12 women) who underwent LC at either 10 or 15 mmHg of IAP were randomized into two groups. Repeated blood samples were collected to measure thiobarbituric acid reactive substances (TBARS) levels to assess lipid peroxidation and protein carbonyl content and protein sulfhydryl groups to assess protein oxidation status. RESULTS Serum protein carbonyls and TBARS levels were found to be increased immediately after desufflation in both study groups when compared to the preoperative levels. On the other hand, protein sulfhydryl levels were found to be decreased in both study groups. Although increases in protein carbonyls and TBARS levels were more prominent in patients who underwent LC at 15 mmHg of IAP, this difference was not statistically significant between both groups. CONCLUSIONS The results suggest that both 15 and 10 mmHg of LAP could lead to an increased oxidative stress response during LC, but no difference was found between the groups.
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Affiliation(s)
- C Polat
- Department of General Surgery, Faculty of Medicine, Afyon Kocatepe University, Afyon, Turkey.
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Yilmaz S, Ates E, Polat C, Koken T, Tokyol C, Akbulut G, Gokce O. Ischemic preconditioning decreases laparoscopy-induced oxidative stress in small intestine. Hepatogastroenterology 2003; 50:979-82. [PMID: 12845962] [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: 03/03/2023]
Abstract
BACKGROUND/AIMS Laparoscopy is advantageous but its adverse effects have not yet been completely elucidated. Pneumoperitoneum performed to facilitate laparoscopy causes the organ perfusion decrease such as in the intestine. Oxidative stress reflects the tissue injury related to ischemia and reperfusion. We previously showed that laparoscopy causes oxidative stress in intestinal tissues. To assess whether the preconditioning phenomenon could be taken advantage of during laparoscopy we designed this randomized, controlled, experimental study with blind outcome assessment. We evaluated the effect of preconditioning, including sequential periods of pneumoperitoneum and desufflation on laparoscopy-induced tissue injury of small bowel with the help of two important markers of oxidative stress, thiobarbituric acid reactive substances and reduced glutathione. METHODOLOGY Forty Sprague-Dawley male rats were used. After anesthesia, an intraperitoneal catheter was inserted. Pneumoperitoneum was created in all except controls, by CO2 insufflation under a pressure of 15 mmHg. The rats were randomized into the groups below: Group P was subjected to 60 minutes of pneumoperitoneum; Group P/D was subjected to 60 minutes of pneumoperitoneum followed by 45 minutes of desufflation; Group IP + P was subjected to 10 minutes of pneumoperitoneum, 10 minutes of desufflation and 60 minutes of pneumoperitoneum; Group IP + P/D was subjected to 10 minutes of pneumoperitoneum, 10 minutes of desufflation, 60 minutes of pneumoperitoneum and 45 minutes of desufflation; Group C (Control) was subjected to a sham operation, without pneumoperitoneum. Small bowel tissue malondialdehyde and reduced glutathione activities were measured, as applicable, by investigators blinded to the study design. The results were decoded and statistically analyzed with Kruskal-Wallis test. Mann-Whitney U test was used to compare the paired groups. p < 0.05 was considered significant. RESULTS Small bowel tissue malondialdehyde levels were increased, whereas glutathione values were decreased in Groups P and P/D, as compared to Groups PRE/P and PRE/P/D; the latter two groups had results similar to the Control Group. CONCLUSIONS Laparoscopic preconditioning may reduce the oxidative injury in intestine following laparoscopic procedures.
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Affiliation(s)
- S Yilmaz
- Department of General Surgery, Afyon Kocatepe University, Faculty of Medicine, Eskisehir, Turkey.
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Abstract
Mesenteric cysts are rare intra-abdominal lesions. They are usually diagnosed as an incidental laparotomy finding in adults but in childhood, they may present with acute abdomen. In this report, a 72-year old female was referred to our hospital, suffering from acute abdominal pain, several episodes of nausea and vomiting. Clinical abdominal examination revealed an irreducible recurrent umbilical hernia. The patient had both muscular defense and abdominal tenderness. Plain abdominal radiography showed multiple air-fluid levels. With these findings, a diagnosis of acute abdominal pathology was accepted and an urgent laparotomy was performed. A 5-cm-diameter mesenteric cyst was excised from the mesentery of the proximal jejunum and a prosthetic mesh was placed for incisional hernia. This is the first report of a strangulated umbilical hernia complicated with a mesenteric cyst.
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Affiliation(s)
- C Polat
- Department of General Surgery, Faculty of Medicine, Afyon Kocatepe University, Afyon, Turkey.
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Polat C, Kahraman A, Yilmaz S, Koken T, Serteser M, Akbulut G, Arikan Y, Dilek ON, Gokce O. A comparison of the oxidative stress response and antioxidant capacity of open and laparoscopic hernia repairs. J Laparoendosc Adv Surg Tech A 2003; 13:167-73. [PMID: 12855098 DOI: 10.1089/109264203766207681] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.2] [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: 11/13/2022] Open
Abstract
BACKGROUND Free radical-induced lipid peroxidation that is associated with a decrease in the antioxidant status of plasma occurs in many kinds of surgical procedures. In this study, we aimed to investigate markers of oxidative stress--malondialdehyde (as thiobarbituric acid reactive substances), protein carbonyls, and protein sulfhydryls--in patients undergoing Lichtenstein tension-free hernioplasty (LH) or laparoscopic preperitoneal hernia (LPPH) repair. METHODS Seventeen patients with unilateral inguinal hernia and no complications or recurrence were included in this study. Ten were randomized to undergo LH and seven to LPPH repair. Heparinized blood samples were taken to measure the levels of oxidative stress markers in the patients undergoing hernia repair. Levels of malondialdehyde, protein carbonyls, and protein sulfhydryls were measured preoperatively and at 6 and 24 hours postoperatively in all patients. RESULTS Both types of hernia repair caused a significant increase in the oxidative stress response and a decrease in antioxidant activity. Plasma levels of malondialdehyde and carbonyls (indicators of oxidant activity) were significantly higher in the LH than in the LPPH repair group (P<.05), and plasma sulfhydryl levels (indicators of antioxidant activity) were significantly lower in the LH than in the LPPH group (P<.05). In both groups, significant differences were also found between the preoperative levels and the postoperative levels 6 and 24 hours (P<.05). CONCLUSIONS These data demonstrate that both LH and LPPH repair cause a significant increase in markers of oxidative stress; however, the oxidative stress response associated with LH is greater than that associated with LPPH repair.
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Affiliation(s)
- C Polat
- Department of General Surgery, Afyon Kocatepe University School of Medicine, Afyon, Turkey.
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Yilmaz S, Koken T, Tokyol C, Kahraman A, Akbulut G, Serteser M, Polat C, Gokce C, Gokce O. Can preconditioning reduce laparoscopy-induced tissue injury? Surg Endosc 2003; 17:819-24. [PMID: 12584602 DOI: 10.1007/s00464-002-9096-z] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.6] [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: 05/15/2002] [Accepted: 10/03/2002] [Indexed: 11/24/2022]
Abstract
BACKGROUND Pneumoperitoneum (P) created to facilitate laparoscopy (L) is associated with splanchnic perfusion, ischemia/reperfusion (I/R) injury, and oxidative stress. In this randomized controlled experimental study with blind outcome assessment, we evaluated the effect of preconditioning (PRE) on L-induced I/R injury. METHODS The subjects were 40 Sprague-Dawley male rats. P was created in all except controls, using carbondioxide (CO2) insufflation under a pressure of 15 mmHg. PRE consisted of 10 min of P, followed by 10 min of deflation (D). The rats were randomized to the following groups: Group P was subjected to 60 min of P. Group P/D was subjected to 60 min of P, followed by 45 min of D. Group PRE/P was subjected to PRE, followed by 60 min of P. Group PRE/P/D was subjected to PRE, followed by 60 min of P and 45 min of D. Group C (control) was subjected to a sham operation, without P. Its anesthesia time was equal to that for group PRE/P/D. At the end of the experiments, the rats were killed; blood, liver, and kidney samples were then obtained and coded. Plasma alanine aminotransferase (ALT) and malondialdehyde (MDA), as well as homogenized tissue MDA levels and glutathione (GSH) activities, were measured; tissue samples were assessed for histopathological evidence of injury; all assessments were done by investigators blinded to the study design. The results were decoded and analyzed statistically with the Kruskal-Wallis and Mann Whitney tests. A p <0.05 was considered significant. RESULTS Plasma ALT as well as plasma, liver, and kidney MDA levels and liver and kidney injury scores were increased, whereas liver and kidney GSH values were decreased in groups P and P/D, as compared to group C. Rats subjected to PRE before P had plasma ALT, kidney MDA, and kidney and liver GSH levels comparable to controls; their kidney and liver injury scores were higher than controls but significantly lower than nonpreconditioned animals. PRE enabled decreased plasma, kidney, and liver MDA as well as increased kidney GSH if applied before P; its efficacy on oxidative stress was limited to providing decreased kidney MDA and increased kidney GSH if applied before P/D. However, PRE significantly attenuated kidney and liver injury after P as well as P/D. CONCLUSION PRE consisting of 10 min of P followed by 10 min of D decreases the oxidative stress induced by sustained P in the plasma, liver, and kidney. PRE significantly limits liver and kidney injury after prolonged P and P/D. After further studies to define its ideal timing, PRE before L incorporating P may have clinical relevance, especially for elderly patients or those with impaired hepatic and/or renal function or perfusion.
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Affiliation(s)
- S Yilmaz
- Department of General Surgery, Faculty of Medicine, Afyon Kocatepe University, Afyon, Turkey.
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Polat C, Arikan Y, Vatansev C, Akbulut G, Yilmaz S, Dilek FH, Gokçe O. The effects of increased intraabdominal pressure on colonic anastomoses. Surg Endosc 2002; 16:1314-9. [PMID: 11988804 DOI: 10.1007/s00464-001-9193-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.0] [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: 10/15/2001] [Accepted: 12/20/2001] [Indexed: 12/20/2022]
Abstract
BACKGROUND This experimental, randomized, controlled study was designed to investigate the effects of increased intraabdominal pressure (IAP) on colocolic anastomoses. To our knowledge, this is the first study to address this important issue. METHODS For this study, 50 Wistar albino rats were randomized into five groups. The animals in all the groups underwent laparotomy and colocolic anastomosis. The rats in the control group were not subjected to increased IAP. Accordingly, IAP's of 14, 20, 25, and 30 mmHg were established by carbon dioxide insufflation and maintained for 60 min in study groups 1, 2, 3 and 4, respectively. Colocolic anastomosis was realized after these periods of IAP in the study groups. Half of the surviving rats in all the groups were sacrificed on postoperative days 7 and 14 to allow comparison between the control and study groups with respect to their mean body weights, mean anastomosis bursting pressures, and histopathologic characteristics of their anastomosis sites. RESULTS The mean body weights of all the groups were comparable at all times during the study. The anastomosis bursting pressures of the animals subjected to increased IAP were lower than that of the control group, with the differences reaching statistical relevance for the animals subjected to an IAP of 20 mmHg or higher on postoperative day 7 (p <0.0005 for study groups 2, 3, and 4 vs the control group) and becoming more pronounced by the day 14 (p <0.0005 for study groups 2, 3, and 4 vs the control group). The anastomosis bursting pressure showed an inverse correlation with IAP. The adequacy of mucosal layer formation at the anastomosis line was lower and the degree of inflammation was higher in the groups exposed to an IAP of 20 mmHg or higher in the control group (p <0.05 for both comparisons among study groups 2, 3 and 4 vs the control group). CONCLUSIONS An IAP increased to 20 mmHg and higher was found to result in impaired strength and wound healing in colocolic anastomoses, as reflected by the decreased bursting pressure and mucosal layer formation, and by the increased inflammation at the anastomosis sites of animals subjected to high IAP values.
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Affiliation(s)
- C Polat
- Department of General Surgery, Afyon Kocatepe University, Afyon, Turkey.
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Abstract
Benign cystic tumors are rare intra-abdominal lesions that may be retroperitoneal, mesenteric, or omental. Most of them cause nonspecific symptoms, but rarely, they cause serious complications such as volvulus, rupture, or bowel obstruction. The diagnosis of these tumors can be made by abdominal ultrasonography or CT. Their only treatment is surgical excision, which can be done by either laparotomy or laparoscopic surgery. In last decade, laparoscopic surgical approaches have replaced open procedures in many surgical abdominal diseases. In this paper, a patient with laparoscopically excised mesenteric cyst is presented along with a literature review.
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Affiliation(s)
- C Polat
- First Department of Surgery, Taksim Teaching Hospital, Istanbul, Turkey.
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Soybir GR, Köksoy F, Polat C, Ozşeker A, Yalçln O, Aker Y, Topuzlu C. The effects of sterile or infected bile and dropped gallstones in abdominal adhesions and abscess formation. Surg Endosc 1997; 11:711-3. [PMID: 9214316 DOI: 10.1007/s004649900433] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
BACKGROUND The effects of gallstones and sterile or infected bile on postoperative adhesions and abscess formation were investigated in Sprague Dawley rats. METHODS The first three groups were injected intraperitoneally with serum saline, sterile bile, or infected bile, respectively. Laparotomy was adjusted to the next seven groups. Serum saline, sterile bile, and infected bile were injected in the fourth through sixth groups intraperitoneally, respectively. Gallstones were placed intraabdominally to the seventh through ninth groups. The injections of sterile bile in group 7 and of infected bile in group 8 were added to laparotomies. Only laparotomy was carried out in group 10. RESULTS Abscess formations were seen only in infected-bile-injected groups. Significant adhesion formations were seen in infected-bile groups. Sterile bile and/or gallstones had no significant effect in abscess or adhesion formation. CONCLUSIONS Results suggest that noninfected gallstones and sterile bile, even in combination, do not increase postoperative intraabdominal complications in rats.
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Affiliation(s)
- G R Soybir
- Department of Surgery, Istanbul Taksim State Hospital, Siraselviler Cad., 80060 Istanbul, Turkey
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Affiliation(s)
- E Varoğlu
- Department of Nuclear Medicine, Atatürk University, Medical School, Erzurum, Turkey
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Polat C. Temporal variation in morphine-mast cell interaction. Chronobiologia 1985; 12:169-72. [PMID: 2411480] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The possible rhythmic interaction between morphine and mast cell was investigated in mice. It has been found that both at normal and drug-induced state, mast cells varied as a function of time and the number of mast cells was significantly affected at the time in which the number of mast cells was highest over a 24-h period. The exact underlying mechanism of the phenomenon still remains to be investigated.
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Polat C. Circadian variation in the structure of mast cells. Acta Anat (Basel) 1980; 108:443-5. [PMID: 6115537 DOI: 10.1159/000145343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Circadian variation in the structure of mast cells has been demonstrated histologically. At 11.00 h the number of mast cells was increased and at 03.00 h it was significantly decreased (p less than 0.01). Morphological analysis has also supported this phenomenon.
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Polat C. Chronoteratology. Chronobiologia 1980; 7:83-4. [PMID: 7438895] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Polat C. Chronopharmacology and antibiotic therapy. J Antimicrob Chemother 1979; 5:118-9. [PMID: 762002 DOI: 10.1093/jac/5.1.118] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022] Open
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