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Orhan F, Akıncıoğlu A, Ceyran E. Ectoine production from a novel bacterial strain and high-purity purification with a cost-effective and single-step method. J Biotechnol 2024; 388:24-34. [PMID: 38599284 DOI: 10.1016/j.jbiotec.2024.04.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2023] [Revised: 03/08/2024] [Accepted: 04/05/2024] [Indexed: 04/12/2024]
Abstract
This study marks the exploration into the production of ectoine, a valuable compound with significant potential as an antioxidant, osmoprotectant, anti-inflammatory agent, and stabilizer of cell membranes, proteins, and DNA integrity. Our focus centred on investigating the presence of ectoine and optimizing its production by the novel ectoine producer bacterial strain, Piscibacillus halophilus. For the optimization of ectoine production the effects of carbon and nitrogen sources, salt, pH, agitation and incubation period were optimized by one-factor-at-a-time. We started with an initial ectoine content of 46.92 mg/L, and through a series of optimization processes, we achieved a remarkable increase, resulting in an ectoine content of 1498.2 mg/L. The bacterial species P. halophilus achieved its highest ectoine production after 48 h of incubation, with conditions set at 10 % (w/v) salinity, pH of 7.50, and an agitation speed of 160 rpm. These precise conditions were found to be the most favourable for maximizing ectoine production by this strain. Besides, we have achieved successful purification of ectoine from the crude extract through a streamlined single-step process. This purification method has delivered an exceptional level of purity, surpassing 99.15 %, and an impressive yield of over 99 %. Importantly, we accomplished this using readily available and cost-effective strong acids (HCl) and strong bases (NaOH) to arrange pH gradients. The use of acid and base in the purification process of ectoine reflects an innovative and sustainable methodology.
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Affiliation(s)
- Furkan Orhan
- Agri Ibrahim Cecen University, Art and Science Faculty, Department of Molecular Biology and Genetics, Agri 4100, Turkey; Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey.
| | - Akın Akıncıoğlu
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey; Vocational School, Agri Ibrahim Cecen University, Agri, Turkey
| | - Ertuğrul Ceyran
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey
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Orhan F, Demirci A, Efe D, Aydın R, Bozarı S. Usage of ectoine as a cryoprotectant for cryopreservation of lactic acid bacteria. Folia Microbiol (Praha) 2024; 69:133-144. [PMID: 37917277 DOI: 10.1007/s12223-023-01098-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Accepted: 09/29/2023] [Indexed: 11/04/2023]
Abstract
Streptococcus thermophilus, the only Streptococcus species considered "Generally Recognized Safe", has been used widely in the food industry. This bacterium is one of the most valuable industrial lactic acid bacterial species. Due to the importance of this bacterium in industrial applications, it should be stored for a long time without losing its metabolic properties. The present study aimed to investigate the cryoprotectant effect of three compatible solutes (ectoine, trehalose, and sucrose) on bacterial cells stored at different temperatures (frozen at -80 °C or freeze-dried and subsequently stored at +4, -20, and -80 °C) for three months. The bacterial cells were tested for cell viability, bile salt tolerance, and lactic acid production before and after processing. The highest cell viability, bile salt tolerance, and lactic acid production were obtained with ectoine and under frozen (storage at -80 °C) conditions. In freeze-dried and subsequently stored at various temperatures, the best preservation was obtained at -80 °C, followed by -20 °C and +4 °C. Moreover, when ectoine's preservation potential was compared to other cryoprotectants, ectoine showed the highest preservation, followed by trehalose and sucrose. Although ectoine has a variety of qualities that have been proven, in the current work, we have shown for the first time that ectoine has cryoprotectant potential in yogurt starter cultures (S. thermophilus).
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Affiliation(s)
- Furkan Orhan
- Art and Science Faculty, Department of Molecular Biology and Genetics, Agri Ibrahim Cecen University, Agri, 4100, Türkiye.
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, 4100, Türkiye.
| | - Abdullah Demirci
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, 4100, Türkiye
| | - Derya Efe
- Department of Medicinal and Aromatic Plants, Giresun University, Giresun, Türkiye
| | - Rukiye Aydın
- Engineering Faculty, Basic Sciences Department, Samsun University, Samsun, 55420, Türkiye
| | - Sedat Bozarı
- Department of Molecular Biology and Genetics, Mus Alparslan University, Mus, 49250, Türkiye
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Martínez-Espinosa RM, Kumar S, Upadhyay SK, Orhan F. Editorial: Adaptation of halophilic/halotolerant microorganisms and their applications. Front Microbiol 2023; 14:1252921. [PMID: 37675428 PMCID: PMC10478237 DOI: 10.3389/fmicb.2023.1252921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Accepted: 08/11/2023] [Indexed: 09/08/2023] Open
Affiliation(s)
- Rosa María Martínez-Espinosa
- Department of Biochemistry, Molecular Biology, Edaphology, and Agricultural Chemistry, Faculty of Sciences, University of Alicante, Alicante, Spain
- Applied Biochemistry Research Group, Multidisciplinary Institute for Environmental Studies “Ramón Margalef” University of Alicante, Alicante, Spain
| | - Sumit Kumar
- Amity Institute of Biotechnology, Amity University, Noida, Uttar Pradesh, India
| | - Sudhir K. Upadhyay
- Department of Environmental Science, Veer Bahadur Singh Purvanchal University, Jaunpur, Uttar Pradesh, India
| | - Furkan Orhan
- Faculty of Arts and Science, Department of Molecular Biology and Genetics, Ağrı Ibrahim Çeçen University, Ağrı, Türkiye
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Orhan F, Ceyran E, Akincioğlu A. Optimization of ectoine production from Nesterenkonia xinjiangensis and one-step ectoine purification. Bioresour Technol 2023; 371:128646. [PMID: 36681344 DOI: 10.1016/j.biortech.2023.128646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/13/2023] [Accepted: 01/16/2023] [Indexed: 06/17/2023]
Abstract
In the current study, the optimization of ectoine production byNesterenkonia xinjiangensisand purification of ectoine from the bacterial cell extract were performed for the first time. Various carbon sources (glucose, sucrose, maltose, lactose, mannitol, and xylose) and nitrogen sources (ammonium nitrate, ammonium phosphate, ammonium chloride, ammonium oxalate, ammonium sulphate, and ammonium acetate), were used to optimize ectoine production. Subsequently, the effects of salt, pH and, concentrations of carbon and nitrogen source on ectoine production were optimized by response surface methodology (RSM). Ultimately, high pure (over 99%) and yield (98%) of ectoine from bacterial cells extracted was obtained by a single-step process using cation exchange chromatography. This study provides information that higher ectoine production can be achieved from this bacterial isolate by optimizing the factors influencing ectoine production and thus can be used as a new and alternative ectoine producer.
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Affiliation(s)
- Furkan Orhan
- Agri Ibrahim Cecen University, Art and Science Faculty, Department of Molecular Biology and Genetics, 4100 Agri, Turkey; Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey.
| | - Ertuğrul Ceyran
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey
| | - Akın Akincioğlu
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, Turkey; Vocational School, Agri Ibrahim Cecen University, Agri, Turkey
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Orhan F, Ceyran E. Identification of novel halophilic/halotolerant bacterial species producing compatible solutes. Int Microbiol 2022; 26:219-229. [PMID: 36342583 DOI: 10.1007/s10123-022-00289-y] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2022] [Revised: 10/15/2022] [Accepted: 10/25/2022] [Indexed: 11/09/2022]
Abstract
Ectoine and hydroxyectoine are compatible solutes with enormous potential for use in the medical and cosmetic industries. Considering the excellent osmoprotective properties of these compatible solutes, we investigate the presence of four compatible solutes (ectoine, hydroxyectoine, proline, and glutamic acid) quantitatively by liquid chromatography-tandem mass spectrometry (LC-MS/MS) in forty-five halophilic/halotolerant bacterial isolates. We determined ectoine production by Marinibacillus sp., Nesterenkonia xinjiangensis, Halobacillus sp., Bacillus patagoniensis, Virgibacillus picturae, Halomonas neptunia, Bacillus patagoniensis, Gracilibacillus sp., Thalassobacillus devorans, Microbacterium sp., Nesterenkonia sp., and Bacillus agaradhaerens, and this production was NaCl dependent. Additionally, the production of hydroxyectoine was observed in six bacterial isolates (Nesterenkonia xinjiangensis, Halobacillus sp., Halomonas neptunia, Thalassobacillus devorans, Nesterenkonia sp., and Bacillus agaradhaerens) which was NaCl and temperature dependent. The study identified new bacterial isolates producing ectoine or hydroxyectoine. While the ectoine production in many different Bacillus members and a few Nesterenkonia have been documented before, ectoine production by Bacillus patagoniensis and Nesterenkonia xinjiangensis has not been shown so far. Further, ectoine production by a member of the genus Thalassobacillus (Thalassobacillus devorans) was demonstrated experimentally for the first time. The findings reported in the study may serve as a basis for the large-scale production of ectoine and hydroxyectoine in the future.
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Affiliation(s)
- Furkan Orhan
- Department of Molecular Biology and Genetics, Agri İbrahim Cecen University, Agri, 04200, Turkey.
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, 04200, Turkey.
| | - Ertuğrul Ceyran
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, Agri, 04200, Turkey
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Orhan F, Senturk M, Genisel M. A new carbonic anhydrase identified in the Gram-negative bacterium (Chromohalobacter sp.) and the interaction of anions with the enzyme. Comp Biochem Physiol C Toxicol Pharmacol 2022; 254:109290. [PMID: 35114393 DOI: 10.1016/j.cbpc.2022.109290] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/16/2021] [Revised: 01/20/2022] [Accepted: 01/26/2022] [Indexed: 11/19/2022]
Abstract
In this study, the characterization and inhibition characteristic of α-class carbonic anhydrase from Chromohalobacter (ChCA) was documented for the first time. The carbonic anhydrase enzyme had 47.77% yield and 54.45-fold purity. The specific activity of the enzyme was determined as 318.52 U/mg proteins. Alternative substrate (4-nitrophenyl trifluoroacetate, 4-nitrophenyl phosphate, 4-nitrophenyl sulphate and 4-nitrophenyl acetate) were tested for the enzyme. KM and Vmax values for 4-nitrophenyl acetate were 4.57 mM and 4.29 EU/mL and for 4-nitrophenyl trifluoroacetate were 2.39 mM and 2.41 EU/mL. The anions, Cl-, NO2-, NO3-, Br-, ClO3-, ClO4-, I-, CO32- and SO42-, inhibited the ChCA hydratase activity. Among nine anions, the strongest inhibitor activities were obtained with micro molar concentrations of NO2-, NO3-, Br-, I-, CO32- (KI values of 160-255 μM). Other four anions tested (Cl-, ClO3-, ClO4- and SO42-) showed moderate inhibitory activities (KI values of 680-813.5 μM). The results obtained demonstrate that the anions we tested inhibit the Chromohalobacter CA (ChCA) enzyme as in other α-CAs in mammals; however, the susceptibility of ChCA resulted from anions differed significantly from that of other organism CAs.
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Affiliation(s)
- Furkan Orhan
- Agri Ibrahim Cecen University, Art and Science Faculty, Molecular Biology Department, 4100 Agri, Turkey; Agri Ibrahim Cecen University, Central Research and Application Laboratory, 4100 Agri, Turkey.
| | - Murat Senturk
- Agri Ibrahim Cecen University, Pharmacy Faculty, Department of Biochemistry, 4100 Agri, Turkey
| | - Mucip Genisel
- Agri Ibrahim Cecen University, Central Research and Application Laboratory, 4100 Agri, Turkey; Agri Ibrahim Cecen University, Pharmacy Faculty, Department of Pharmaceutical Botany, 04100 Agri, Turkey
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Orhan F, Demirci A, Gormez A. Carbonate and silicate dissolving bacteria isolated from home-made yogurt samples. AN ACAD BRAS CIENC 2021; 93:e20200002. [PMID: 34378758 DOI: 10.1590/0001-3765202120200002] [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] [Received: 01/08/2020] [Accepted: 03/16/2020] [Indexed: 11/22/2022] Open
Abstract
In the current study, twenty-eight bacterial strains were isolated from home-made yogurt samples from Ağrı Province, Turkey. The bacterial strains were identified by conventional and molecular techniques. Among the twenty- eight isolates, seventeen isolates were identified according to the 16 S rDNA region and determined to belong to five different genus including Sphingomonas (8 isolates), Burkholderia (5 isolates), Lactobacillus (2 isolates), Lactococcus (1 isolate), Staphylococcus (1 isolate). In this study, the presence of Burkholderia in home-made yogurt samples were reported for the first time, whereas Sphingomonas was detected for the second time. We also investigated the carbonate (CaCO3 and MgCO3) and silicate (CaSiO3 and MgSiO3) dissolving potential of seventeen bacterial isolates. Among these seventeen bacterial isolates, fifteen bacterial isolates have CaCO3-dissolving and 10 bacterial isolates have MgCO3-dissolving potential. The silicates dissolution ability was relatively less than that of carbonates dissolving. We observed that six bacterial isolates have CaSiO3 and only two bacterial isolates have MgSiO3 dissolution abilities. In conclusion, this work clearly shows the diversity of bacteria existing in fermented cow milk samples in Ağrı Province, Turkey, which could be considered as valuable sources for lactic acid bacteria (LAB) isolation and further probiotic potential.
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Affiliation(s)
- Furkan Orhan
- Agri Ibrahim Cecen University, Science and Art Faculty, Molecular Biology and Genetics Department, 04100 Agri, Turkey.,Agri Ibrahim Cecen University, Central Research and Application Laboratory, 04100 Agri, Turkey
| | - Abdullah Demirci
- Agri Ibrahim Cecen University, Central Research and Application Laboratory, 04100 Agri, Turkey
| | - Arzu Gormez
- Erzurum Technical University, Science Faculty, Molecular Biology and Genetics Department, 25050 Erzurum, Turkey
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Santillo AF, Lundgren S, Xu C, Orhan F, Fatouros-Bergman H, Blennow K, Zetterberg H, Portelius E, Cervenka S, Jönsson EG, Erhardt S, Engberg G. Neurogranin as a potential synaptic marker in the cerebrospinal fluid of patients with a first episode psychosis. Schizophr Res 2019; 208:490-492. [PMID: 30733168 DOI: 10.1016/j.schres.2019.01.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2018] [Revised: 01/09/2019] [Accepted: 01/10/2019] [Indexed: 01/11/2023]
Affiliation(s)
- A F Santillo
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden; Clinical Memory Research Unit and Psychiatry, Department of Clinical Sciences, Lund University, Malmö, Sweden.
| | - S Lundgren
- Clinical Memory Research Unit and Psychiatry, Department of Clinical Sciences, Lund University, Malmö, Sweden
| | - C Xu
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - F Orhan
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - H Fatouros-Bergman
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - K Blennow
- Clinical Neurochemistry Laboratory, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
| | - H Zetterberg
- Clinical Neurochemistry Laboratory, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Department of Neurodegenerative Disease, UCL Institute of Neurology, Queen Square, London, UK; UK Dementia Research Institute at UCL, London, UK
| | - E Portelius
- Clinical Neurochemistry Laboratory, Institute of Neuroscience and Physiology, Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden; Department of Psychiatry and Neurochemistry, Institute of Neuroscience and Physiology, The Sahlgrenska Academy at the University of Gothenburg, Mölndal, Sweden
| | | | - S Cervenka
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - E G Jönsson
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden; NORMENT, KG Jebsen Centre for Psychosis Research, Institute of Clinical Medicine, Psychiatry Section, University of Oslo, Norway
| | - S Erhardt
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - G Engberg
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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Sismanlar Eyuboglu T, Doğru Ersoz D, Cakır E, Cobanoglu N, Pekcan S, Cinel G, Yalcın E, Kiper N, Sen V, Selimoglu Sen H, Ercan O, Keskin O, Bilgic Eltan S, Muhammed Al Shadfan L, Yazan H, Altıntas D, Sasihuseyinoglu S, Sapan N, Cekic S, Cokugras H, Kılınc A, Ramaslı Gursoy T, Aslan A, Bingol A, Basaran A, Ozdemir A, Kose M, Hangul M, Emiralioglu N, Tugcu G, Yuksel H, Yılmaz O, Orhan F, Gayretli Aydın Z, Topal E, Tamay Z, Suleyman A, Can D, Bal C, Caltepe G, Ozcelik U. P323 Pseudo Bartter Syndrome: the most common complication in the Turkish National Cystic Fibrosis Registry. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30616-2] [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: 10/26/2022]
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Sismanlar Eyuboglu T, Dogru Ersoz D, Cakır E, Cobanoglu N, Pekcan S, Cinel G, Yalcın E, Kiper N, Sen V, Selimoglu Sen H, Ercan O, Keskin O, Bilgic Eltan S, Muhammed Al Shadfan L, Yazan H, Altıntas D, Sasihuseyinoglu S, Sapan N, Cekic S, Cokugras H, Kılınc A, Ramaslı Gursoy T, Aslan A, Bingol A, Basaran A, Ozdemir A, Kose M, Hangul M, Emiralioglu N, Tugcu G, Yuksel H, Yılmaz O, Orhan F, Gayretli Aydın Z, Topal E, Tamay Z, Suleyman A, Can D, Bal C, Caltepe G, Ozcelik U. P311 Clinical features of cystic fibrosis patients with chronic liver disease in the Turkish National Cystic Fibrosis Registry. J Cyst Fibros 2019. [DOI: 10.1016/s1569-1993(19)30604-6] [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: 10/26/2022]
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Orhan F, Schwieler L, Fatouros-Bergman H, Malmqvist A, Cervenka S, Collste K, Flyckt L, Farde L, Sellgren CM, Piehl F, Engberg G, Erhardt S. Increased number of monocytes and plasma levels of MCP-1 and YKL-40 in first-episode psychosis. Acta Psychiatr Scand 2018; 138:432-440. [PMID: 30132802 DOI: 10.1111/acps.12944] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [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] [Accepted: 07/10/2018] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Accumulating evidence implicates immune activation in the development of schizophrenia. Here, monocyte numbers, monocyte chemoattractant protein-1 (MCP-1) and chitinase-3-like protein 1 (YKL-40) were investigated in plasma and cerebrospinal fluid (CSF) in first-episode psychosis (FEP) patients. METHOD CSF and blood were sampled from 42 first-episode psychosis (FEP) patients and 22 healthy controls. The levels of YKL-40 and MCP-1 were measured using electrochemiluminescence assay, and blood monocytes were counted using an XN-9000-hematology analyzer. RESULTS We found higher plasma levels of MCP-1 and YKL-40 in FEP patients compared with healthy controls, a condition that was unrelated to antipsychotic and/or anxiolytic medication. This was combined with an increased number of blood monocytes and a borderline significant increase in YKL-40 levels in the CSF of tobacco-free FEP patients. Plasma or CSF chemokines or blood monocytes did not correlate with the severity of symptoms or the level of functioning. CONCLUSION These data demonstrate activation of monocytes in FEP and strengthens the idea of an immune dysfunction of psychotic disorders. Further studies are required to perceive a role of YKL-40 and MCP-1 in the initiation and progression of schizophrenia.
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Affiliation(s)
- F Orhan
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - L Schwieler
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - H Fatouros-Bergman
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - A Malmqvist
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - S Cervenka
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - K Collste
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - L Flyckt
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden
| | - L Farde
- Centre for Psychiatry Research, Department of Clinical Neuroscience, Karolinska Institutet & Stockholm Health Care Services, Stockholm County Council, Stockholm, Sweden.,PET Science Centre, Precision Medicine and Genomics, IMED Biotech Unit, AstraZeneca, Karolinska Institutet, Stockholm, Sweden
| | - C M Sellgren
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.,Department of Psychiatry, Harvard Medical School, Boston, MA, USA.,Center for Experimental Drugs and Diagnostics, Center for Human Genetic Research and Department of Psychiatry, Massachusetts General Hospital, Boston, MA, USA.,Stanley Center for Psychiatric Research, Broad Institute of MIT and Harvard, Cambridge, MA, USA
| | - F Piehl
- Department of Clinical Neuroscience, Neuroimmunology Unit, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | | | - G Engberg
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - S Erhardt
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
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Ceker S, Orhan F, Sezen S, Gulluce M, Ozkan H, Aslan A, Agar G. Anti-mutagenic and Anti-oxidant Potencies of Cetraria Aculeata (Schreb.) Fr., Cladonia Chlorophaea (Flörke ex Sommerf.) Spreng. and Cetrelia olivetorum (Nyl.) W.L. Culb. & C.F. Culb.). Iran J Pharm Res 2018; 17:326-335. [PMID: 29755563 PMCID: PMC5937102] [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] [Download PDF] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
In this study, the mutagenic and anti-mutagenic effects of methanol extract of three lichen species (Cetraria aculeata, Cladonia chlorophaea and Cetrelia olivetorum) were investigated by using E. coli-WP2, Ames-Salmonella (TA1535 and TA1537) and sister chromatid exchange (SCE) test systems. The results obtained from bacterial test systems demonstrated that methanol extracts of three lichen species have strong anti-mutagenic potencies on TA1535, TA1537 strains and to a lesser extent on E. coli-WP2 strain. The anti-oxidant level of human lymphocytes cells was determined in order to clarify the mechanism underlying the anti-mutagenic effects of these lichen species. Co-treatments of 5, 10 and 20 µg/mL concentrations of these three lichen species with AFB decreased the frequencies of SCE and the level of MDA and increased the amount of SOD, GSH and GPx which decreased by aflatoxin. The findings of this work have clearly demonstrated that Cetraria aculeata, Cladonia chlorophaea and Cetrelia olivetorum have significant anti-mutagenic effects which are thought to be partly due to the anti-oxidant activities and the interaction capability of lichen extracts with mutagen agents (Sodium azide, acridin, N-methyl-N'-nitro-N-nitrosoguanidine and aflatoxin B1).
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Affiliation(s)
- Selcuk Ceker
- Agri Ibrahim Cecen University, Faculity of Pharmacy, Agri, TR-04100, Turkey. ,Corresponding author: E-mail:
| | - Furkan Orhan
- Agri Ibrahim Cecen University, Central Research and Application Laboratory, Agri, TR-04100, Turkey.
| | - Selma Sezen
- Ataturk University, Faculty of Science, Department of Biology, Erzurum, TR-25240, Turkey.
| | - Medine Gulluce
- Ataturk University, Faculty of Science, Department of Biology, Erzurum, TR-25240, Turkey.
| | - Hakan Ozkan
- Ataturk University, Faculty of Science, Department of Biology, Erzurum, TR-25240, Turkey.
| | - Ali Aslan
- Yüzüncü Yıl University, Faculity of Pharmacy TR-65150, Turkey.
| | - Güleray Agar
- Ataturk University, Faculty of Science, Department of Biology, Erzurum, TR-25240, Turkey.
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Orhan F, Bhat M, Sandberg K, Ståhl S, Piehl F, Svensson C, Erhardt S, Schwieler L. Tryptophan Metabolism Along the Kynurenine Pathway Downstream of Toll-like Receptor Stimulation in Peripheral Monocytes. Scand J Immunol 2017; 84:262-271. [PMID: 27607184 DOI: 10.1111/sji.12479] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2016] [Accepted: 09/04/2016] [Indexed: 01/19/2023]
Abstract
Tryptophan degradation along the kynurenine pathway is of central importance for the immune function. Toll-like receptors (TLRs), representing the first line of immune defence against pathogens, are expressed in various cell types. The most abundant expression is found on monocytes, macrophages and dendritic cells. The aim of this study was to investigate whether stimulation with different TLR ligands induces the kynurenine pathway in human peripheral monocytes. Cell supernatants were analysed using a liquid chromatography/mass spectrometry to measure kynurenine, kynurenic acid (KYNA), quinolinic acid (QUIN) and tryptophan. Stimulation of TLR-2, TLR-3, TLR-4, TLR-7/8 and TLR-9 was found to induce the production of kynurenine, but only stimulation of TLR-3 increased levels of further downstream metabolites, such as KYNA and QUIN. Stimulation of TLR-1, TLR-5 and TLR-6 did not induce the kynurenine pathway. Taken together, this study provides novel evidence demonstrating that TLR activation induces a pattern of downstream tryptophan degradation along the kynurenine pathway in monocytes. The results of this study may implicate that TLRs can be used as new drug targets for the regulation of aberrant tryptophan metabolism along this pathway, a potential therapeutic strategy that may be of importance in several disorders.
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Affiliation(s)
- F Orhan
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - M Bhat
- Protein Biomarkers, Personalized Healthcare & Biomarker Laboratories, Innovative Medicines, Gothenburg, Sweden
| | - K Sandberg
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.,Department of Medicinal Chemistry, Science for Life Laboratory, Biomedical Center, Uppsala University, Uppsala, Sweden
| | - S Ståhl
- Protein Biomarkers, Personalized Healthcare & Biomarker Laboratories, Innovative Medicines, Gothenburg, Sweden.,Department of Clinical Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - F Piehl
- Department of Clinical Neuroscience Centre for Psychiatry Research, Karolinska Institutet, Stockholm, Sweden
| | | | - C Svensson
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - S Erhardt
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - L Schwieler
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
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Larsson MK, Faka A, Bhat M, Imbeault S, Goiny M, Orhan F, Oliveros A, Ståhl S, Liu XC, Choi DS, Sandberg K, Engberg G, Schwieler L, Erhardt S. Repeated LPS Injection Induces Distinct Changes in the Kynurenine Pathway in Mice. Neurochem Res 2016; 41:2243-55. [PMID: 27165635 DOI: 10.1007/s11064-016-1939-4] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2016] [Revised: 04/19/2016] [Accepted: 04/27/2016] [Indexed: 12/11/2022]
Abstract
The immune system has been recognized as a potential contributor to psychiatric disorders. In animals, lipopolysaccharide (LPS) is used to induce inflammation and behaviors analogous to some of the symptoms in these disorders. Recent data indicate that the kynurenine pathway contributes to LPS-induced aberrant behaviors. However, data are inconclusive regarding optimal LPS dose and treatment strategy. Here, we therefore aimed to evaluate the effects of single versus repeated administration of LPS on the kynurenine pathway. Adult C57BL6 mice were given 0.83 mg/kg LPS as a single or a repeated injection (LPS + LPS) and sacrificed after 24, 48, 72, or 120 h. Mice receiving LPS + LPS had significantly elevated brain kynurenine levels at 24 and 48 h, and elevated serum kynurenine at 24, 48 and 72 h. Brain kynurenic acid and quinolinic acid were significantly increased at 24 and 48 h in mice receiving LPS + LPS, whereas serum kynurenic acid levels were significantly decreased at 24 h. The increase of brain kynurenic acid by LPS + LPS was likely unrelated to the higher total dose as a separate group of mice receiving 1.66 mg/kg LPS as single injection 24 h prior to sacrifice did not show increased brain kynurenic acid. Serum quinolinic acid levels were not affected by LPS + LPS compared to vehicle. Animals given repeated injections of LPS showed a more robust induction of the kynurenine pathway in contrast to animals receiving a single injection. These results may be valuable in light of data showing the importance of the kynurenine pathway in psychiatric disorders.
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Affiliation(s)
- M K Larsson
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - A Faka
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - M Bhat
- Protein Biomarkers, Personalized Healthcare and Biomarkers Laboratories, Innovative Medicines, AstraZeneca, Gothenburg, Sweden
| | - S Imbeault
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - M Goiny
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - F Orhan
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - A Oliveros
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
| | - S Ståhl
- Translational Science Centre, Personalized Healthcare and Biomarkers Laboratories, Innovative Medicines, Science for Life Laboratory, AstraZeneca, Stockholm, Sweden
| | - X C Liu
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - D S Choi
- Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA.,Neurobiology of Disease Program, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA.,Department of Psychiatry and Psychology, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA
| | - K Sandberg
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.,Department of Molecular Pharmacology and Experimental Therapeutics, Mayo Clinic College of Medicine, Rochester, MN, 55905, USA.,Department of Clinical Neuroscience, Karolinska Institutet, Karolinska University Hospital, Stockholm, Sweden
| | - G Engberg
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - L Schwieler
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden
| | - S Erhardt
- Department of Physiology and Pharmacology, Karolinska Institutet, Stockholm, Sweden.
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Orhan F. Alleviation of salt stress by halotolerant and halophilic plant growth-promoting bacteria in wheat (Triticum aestivum). Braz J Microbiol 2016; 47:621-7. [PMID: 27133557 PMCID: PMC4927673 DOI: 10.1016/j.bjm.2016.04.001] [Citation(s) in RCA: 72] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 02/20/2016] [Indexed: 11/27/2022] Open
Abstract
In the current study, 18 halotolerant and halophilic bacteria have been investigated for their plant growth promoting abilities in vitro and in a hydroponic culture. The bacterial strains have been investigated for ammonia, indole-3-acetic acid and 1-aminocyclopropane-1-carboxylate-deaminase production, phosphate solubilisation and nitrogen fixation activities. Of the tested bacteria, eight were inoculated with Triticum aestivum in a hydroponic culture. The investigated bacterial strains were found to have different plant-growth promoting activities in vitro. Under salt stress (200mM NaCl), the investigated bacterial strains significantly increased the root and shoot length and total fresh weight of the plants. The growth rates of the plants inoculated with bacterial strains ranged from 62.2% to 78.1%. Identifying of novel halophilic and halotolerant bacteria that promote plant growth can be used as alternatives for salt sensitive plants. Extensive research has been conducted on several halophilic and halotolerant bacterial strains to investigate their plant growth promoting activities. However, to the best of my knowledge, this is the first study to inoculate these bacterial strains with wheat.
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Affiliation(s)
- Furkan Orhan
- Central Research and Application Laboratory, Agri Ibrahim Cecen University, AĞRI, Turkey; Vocational School Agri Ibrahim Cecen University, AĞRI, Turkey.
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Orhan F, Şentürk M, Supuran CT. Interaction of anions with a newly characterized alpha carbonic anhydrase from Halomonas sp. J Enzyme Inhib Med Chem 2015; 31:1119-23. [DOI: 10.3109/14756366.2015.1100177] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Furkan Orhan
- Central Research and Application Laboratory,
- Vocational School,
| | - Murat Şentürk
- Central Research and Application Laboratory,
- Art and Science Faculty, Chemistry Department, Ağri İbrahim Çeçen University, Ağri, Turkey, and
| | - Claudiu T. Supuran
- Laboratorio Di Chimica Bioinorganica, Polo Scientifico, Università Degli Studi Di Firenze, Florence, Italy
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Anar M, Orhan F, Alpsoy L, Gulluce M, Aslan A, Agar G. The antioxidant and antigenotoxic potential of methanol extract of Cladonia foliacea (Huds.) Willd. Toxicol Ind Health 2013; 32:721-9. [DOI: 10.1177/0748233713504805] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
In this article, the genotoxic and antigenotoxic effects of methanol extract of of Cladonia foliacea (Huds.) Willd. (CME) were studied using WP2, Ames (TA1535 and TA1537), and sister chromatid exchange (SCE) test systems. The results of our studies showed that 5 µM concentration of aflatoxin B1(AFB1) changed the frequencies of SCE and malondialdehyde (MDA) levels, superoxide dismutase (SOD), glutathione (GSH), and glutathione peroxidase (GPx) activities. When 5 and 10 µg/mL concentrations of CME was added to AFB1, the frequencies of SCE and MDA level were decreased and SOD, GSH, and GPx levels were increased. The extract CME did not show any mutagenicity on Ames (Salmonella typhimurium TA1535, TA1537) and WP2 (Escherichia coli) test systems. On the other hand, CME has antimutagenicity on the mentioned test systems. The results of this experiment have clearly shown that CME has a significant antioxidative and antigenotoxic effect, which is thought to be due to the antigenotoxic activities of antioxidant enzymes.
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Affiliation(s)
- Mustafa Anar
- Department of Biology Education, Kazim Karabekir Faculty of Education, Ataturk University, Erzurum, Turkey
| | - Furkan Orhan
- Central Research and Application Laboratories, Agri Ibrahim Cecen University, Agri, Turkey
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Lokman Alpsoy
- Department of Biology, Faculty of Science, Fatih University, Istanbul, Turkey
| | - Medine Gulluce
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Ali Aslan
- Department of Biology Education, Kazim Karabekir Faculty of Education, Ataturk University, Erzurum, Turkey
| | - Guleray Agar
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
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Mustafayev R, Civelek E, Orhan F, Yüksel H, Boz A, Şekerel B. Similar prevalence, different spectrum: IgE-mediated food allergy among Turkish adolescents. Allergol Immunopathol (Madr) 2013; 41:387-96. [PMID: 23036440 DOI: 10.1016/j.aller.2012.05.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2012] [Revised: 05/11/2012] [Accepted: 05/17/2012] [Indexed: 10/27/2022]
Abstract
BACKGROUND Scarcity of reliable data on food allergy prevalence exists in Turkey. We aimed to assess reported and confirmed IgE-mediated food allergy prevalence, and define the spectrum of allergenic food. METHODS We prospectively evaluated the ISAAC Phase II study population for food allergy. Participants that reported experiencing food allergy symptom in the last year and/or were skin prick test positive for a predefined list of food allergens, were interviewed via telephone, and those considered as having food allergy were invited to undergo clinical investigation, including challenge tests. RESULTS A total of 6963 questionnaires were available. Parental reported food allergy prevalence and skin prick sensitisation rate were 20.2 ± 0.9% and 5.9 ± 0.6%. According to the above-defined criteria, 1162 children (symptom positive n=909, skin prick test positive n=301, both positive n=48) were selected and 813 (70.0%) were interviewed via telephone. Out of 152 adolescents reporting a current complaint, 87 accepted clinical investigation. There were 12 food allergies diagnosed in nine adolescents, with food allergy prevalence of 0.16 ± 0.11%. The most common foods involved in allergic reactions were walnut (n=3) and beef meat (n=2), followed by hen's egg (n=1), peanut (n=1), spinach (n=1), kiwi (n=1), cheese (n=1), hazelnut (n=1) and peach (n=1). CONCLUSIONS While parental reported food allergy prevalence was within the range reported previously, confirmed IgE-mediated food allergy prevalence among adolescents was at least 0.16%, and the spectrum of foods involved in allergy differed from Western countries, implying environmental factors may play a role.
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Orhan O, Atalay M, Oz Atalay F, Orhan F. Carcinoma of the Fallopian Tube Presenting as Hydrosalpinx. J Minim Invasive Gynecol 2013. [DOI: 10.1016/j.jmig.2013.08.649] [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: 10/26/2022]
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Gormez A, Karadayi M, Gulluce M, Barıs O, Orhan F, Sahin F. Determination of genotoxic and antigenotoxic effects of Peltigera canica by the bacterial reverse mutation assays. Curr Opin Biotechnol 2013. [DOI: 10.1016/j.copbio.2013.05.347] [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: 10/26/2022]
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Abstract
For ages, lichens have long been investigated popularly for biological roles, mainly antitumor, antimicrobial and antioxidant activities. Many positive results were obtained in these previous research. Thus, in this study, we aimed to determine whether extracts of Usnea articulata (UAE) and Usnea filipendula (UFE) possessing a protection against aflatoxin B1 (AFB1)-induced genotoxic and oxidative damage. The results of our studies showed that 5 μM concentrations of AFB1 increased the frequencies of sister chromatid exchange (SCE) and the level of malondialdehyde (MDA) and decreased the activities of superoxide dismutase (SOD), glutathione (GSH) and glutathione peroxidase (GPx). However, when 5, 10 and 20 µg/mL concentrations of UAE and UFE was added to AFB1, the frequencies of SCE and MDA level were decreased and SOD, GSH and GPx level were increased. The Ames ( Salmonella typhimurium TA1535, TA1537) and WP2 ( Escherichia coli) test systems carried out evinced that UAE and UFE possess any mutagenicity, but have antimutagenic effects. Consequently, the results of this experiment have clearly shown that UAE and UFE have strong antioxidative and antigenotoxic effects that are associated with its antioxidant nature. A detailed study can be performed to determine the antioxidant properties of each compound that will extend the use of lichen extracts in food and pharmacy industries.
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Affiliation(s)
- Selcuk Ceker
- Central Research and Application Laboratories, Agri Ibrahim Cecen University, Agri, Turkey
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Furkan Orhan
- Central Research and Application Laboratories, Agri Ibrahim Cecen University, Agri, Turkey
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | | | - Lokman Alpsoy
- Department of Biology, Faculty of Science, Fatih University, Istanbul, Turkey
| | - Medine Gulluce
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Ali Aslan
- Department of Biology Education, Kazım Karabekir Faculty of Education, Ataturk University, Erzurum, Turkey
| | - Guleray Agar
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
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22
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Orhan F, Gulluce M, Ozkan H, Alpsoy L. Determination of the antigenotoxic potencies of some luteolin derivatives by using a eukaryotic cell system, Saccharomyces cerevisiae. Food Chem 2013; 141:366-72. [PMID: 23768369 DOI: 10.1016/j.foodchem.2013.02.089] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2012] [Revised: 01/10/2013] [Accepted: 02/21/2013] [Indexed: 12/29/2022]
Abstract
In this study, we aimed to examine the mutagenic and antimutagenic potencies of three luteolin derivatives (luteolin-7-O-glucoside, luteolin-7-O-rutinoside and luteolin-7-O-glucuronide) by using a eukaryotic cell system, Saccharomyces cerevisiae (RS112). In the antimutagenicity assays, these luteolin derivatives showed antimutagenic effects in deletion and intrachromosomal recombination events against ethyl methanesulfonate and acridine mutagen agents. In deletion events, the highest inhibition rates for luteolin-7-O-glucoside, luteolin-7-O-rutinoside and luteolin-7-O-glucuronide against ethyl methanesulfonate were 57.6%, 58.3% and 62.5%, respectively. Likewise, the highest inhibition rates for luteolin-7-O-glucoside, luteolin-7-O-rutinoside and luteolin-7-O-glucuronide against acridin were 21.8%, 22.4% and 23.6%, respectively. Our findings showed that these luteolin derivatives have stronger antimutagenic properties against ethyl methanesulfonate compared to the acridine mutagen agent.
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Affiliation(s)
- Furkan Orhan
- Agri Ibrahim Cecen University, Central Research and Application Laboratories, Agri TR-04100, Turkey
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Gulluce M, Orhan F, Yanmis D, Arasoglu T, Guvenalp Z, Demirezer LO. Isolation of a flavonoid, apigenin 7-O-glucoside, from Mentha longifolia (L.) Hudson subspecies longifolia and its genotoxic potency. Toxicol Ind Health 2013; 31:831-40. [DOI: 10.1177/0748233713475511] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Abstract
In this article, the genotoxic and antigenotoxic effects of methanol extract of Evernia prunastri (Huds.) Willd. (MEP) were studied using WP2, Ames (TA1535 and TA1537) and sister chromatid exchange (SCE) test systems. The results obtained from bacterial test systems demonstrated that MEP has strong antimutagenic potencies on TA1537 and WP2 strains. The highest inhibition rates for MEP on TA1537 and WP2 strains were 37.70% and 69.70%, respectively. According to the SCE test system, MEP reduced the genotoxic effects of aflatoxin. In order to clarify the mechanism underlying the antigenotoxic effects of MEP, the antioxidants were determined. Cotreatments of 5, 10 and 20 µg/mL concentrations of MEP with aflatoxin B1 decreased the frequencies of SCE and the malondialdehyde level and increased amount of superoxide dismutase, glutathione and glutathione peroxidase which were decreased by aflatoxin. The data obtained from this work have clearly shown that MEP has significant antigenotoxic effects which are thought to be partly due to the antioxidant activities and antioxidant inducing capability of MEP. This is the first report indicating the antigenotoxic activities of MEP against several mutagen agents such as N-methyl-N'-nitro-N-nitrosoguanidine, acridin and aflatoxin.
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Affiliation(s)
- Lokman Alpsoy
- Department of Biology, Faculty of Science, Fatih University, Istanbul, Turkey
| | - Furkan Orhan
- Central Research and Application Laboratories, Agri Ibrahim Cecen University, Agri, Turkey Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Gokce Nardemir
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Guleray Agar
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Medine Gulluce
- Department of Biology, Faculty of Science, Ataturk University, Erzurum, Turkey
| | - Ali Aslan
- Department of Biology, Kazim Karabekir Faculty of Education, Ataturk University, Erzurum, Turkey
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Orhan F, Barış Ö, Yanmış D, Bal T, Güvenalp Z, Güllüce M. Isolation of some luteolin derivatives from Mentha longifolia (L.) Hudson subsp. longifolia and determination of their genotoxic potencies. Food Chem 2012; 135:764-9. [DOI: 10.1016/j.foodchem.2012.04.137] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2012] [Revised: 04/24/2012] [Accepted: 04/25/2012] [Indexed: 01/19/2023]
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Aslan A, Gulluce M, Agar G, Karadayi M, Bozari S, Orhan F. Mutagenic and antimutagenic properties of some lichen species grown in the Eastern Anatolia Region of Turkey. CYTOL GENET+ 2012. [DOI: 10.3103/s0095452712050039] [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: 11/30/2022]
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Aslan A, Gulluce M, Agar G, Karadayi M, Bozari S, Orhan F. Mutagenic and antimutagenic properties of some lichen species grown in the Eastern Anatolia Region of Turkey. Tsitol Genet 2012; 46:36-42. [PMID: 23342647] [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: 06/01/2023]
Abstract
All the methanol extracts did not show mutagenic activity in Ames/Salmonella and Z. mays MI test systems. Furthermore, some extracts showed significant antimutagenic activity against 9-AA in Ames test system. Inhibition rates for 9-AA mutagenicity ranged from 25.51% (P. furfuracea - 0.05 microg/plate) to 66.14% (C. islandica - 0.05 microg/plate). In addition, all of the extracts showed significant antimutagenic activity against sodium azide (NaN3) mutagenicity on MI values of Z. mays.
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Affiliation(s)
- A Aslan
- Department of Biology, Kazim Karabekir Education Faculty, Atatürk University, Erzurum 25240, Turkey
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Gulluce M, Orhan F, Adiguzel A, Bal T, Guvenalp Z, Dermirezer LO. Determination of antimutagenic properties of apigenin-7-O-rutinoside, a flavonoid isolated from Mentha longifolia (L.) Huds. ssp. longifolia with yeast DEL assay. Toxicol Ind Health 2012; 29:534-40. [PMID: 22491724 DOI: 10.1177/0748233712442732] [Citation(s) in RCA: 10] [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] [Indexed: 11/17/2022]
Abstract
Lamiaceae is an important plant family that has been investigated for its medicinal properties due to its large amounts of phenolic acids and flavonoids. Flavonoids have been shown to have antioxidant and antimutagenic activities in different test systems, but their certain mechanisms are still unclear. This study was designed to evaluate the mutagenic and antimutagenic activities of apigenin 7-O-rutinoside, a flavonoid isolated from Mentha longifolia (L.) Huds. ssp. longifolia. The possible antimutagenic potential of apigenin 7-O-rutinoside (A7R) was examined against mutagens ethyl methanesulfonate (EMS) and acridine (AC) in a eukaryotic cell system Saccharomyces cerevisiae RS112. The results showed that A7R has different inhibition rates against EMS and AC-induced mutagenicity. Thus, the properties of A7R are of great pharmacological importance and might be beneficial for reducing the risk of reactive oxygen species-related diseases.
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Affiliation(s)
- Medine Gulluce
- Department of Biology, Ataturk University, Erzurum, Turkey
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29
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Orhan F, Canitez Y, Bakirtas A, Yilmaz O, Boz AB, Can D, Kuyucu S, Harmanci K, Tahan F, Reisli I, Karakas T, Baki A, Cokugras H, Cakir M, Yuksel H. Anaphylaxis in Turkish children: a multi-centre, retrospective, case study. Clin Exp Allergy 2011; 41:1767-76. [DOI: 10.1111/j.1365-2222.2011.03859.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2011] [Revised: 07/12/2011] [Accepted: 08/03/2011] [Indexed: 01/02/2023]
Affiliation(s)
- F. Orhan
- Department of Pediatric Allergy; Karadeniz Technical University Faculty of Medicine; Trabzon; Turkey
| | - Y. Canitez
- Department of Pediatric Allergy; Uludag University Faculty of Medicine; Bursa; Turkey
| | - A. Bakirtas
- Department of Pediatric Allergy; Gazi University Faculty of Medicine; Ankara; Turkey
| | - O. Yilmaz
- Department of Pediatric Allergy; Celal Bayar University Faculty of Medicine; Manisa; Turkey
| | - A. B. Boz
- Department of Pediatric Allergy; Akdeniz University Faculty of Medicine; Antalya; Turkey
| | - D. Can
- Department of Pediatric Allergy; Dr Behcet Uz Children's Hospital; Izmir; Turkey
| | - S. Kuyucu
- Department of Pediatric Allergy; Mersin University Faculty of Medicine; Mersin; Turkey
| | - K. Harmanci
- Department of Pediatric Allergy; SSK Ankara Diskapi Hospital; Ankara; Turkey
| | - F. Tahan
- Department of Pediatric Allergy; Erciyes University Faculty of Medicine; Kayseri; Turkey
| | - I. Reisli
- Department of Pediatric Allergy and Immunology; Selcuk University Faculty of Medicine; Konya; Turkey
| | - T. Karakas
- Department of Pediatric Allergy; Karadeniz Technical University Faculty of Medicine; Trabzon; Turkey
| | - A. Baki
- Department of Pediatrics; Karadeniz Technical University Faculty of Medicine; Trabzon; Turkey
| | - H. Cokugras
- Department of Pediatric Allergy; Istanbul University Cerrahpasa Faculty of Medicine; Istanbul; Turkey
| | - M. Cakir
- Department of Pediatrics; Karadeniz Technical University Faculty of Medicine; Trabzon; Turkey
| | - H. Yuksel
- Department of Pediatric Allergy; Celal Bayar University Faculty of Medicine; Manisa; Turkey
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Bariş Ö, Güllüce M, Şahin F, Orhan F, Yanmiş D, Bal T, Adigüzel A. The effect of some bacteria on calcification in geothermal water pipes. Curr Opin Biotechnol 2011. [DOI: 10.1016/j.copbio.2011.05.225] [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: 11/17/2022]
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Yanmis D, Sahin F, Gulluce M, Orhan F, Karadayi M, Bal T, Baris Ö. The enrichment potential of magnesite by using some Actinomycetes isolated from caves. Curr Opin Biotechnol 2011. [DOI: 10.1016/j.copbio.2011.05.174] [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: 10/18/2022]
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Sekerel BE, Soyer OU, Keskin O, Uzuner N, Yazicioglu M, Kiliç M, Artaç H, Ozmen S, Can D, Zeyrek D, Cokugras H, Canitez Y, Aydogan M, Kuyucu S, Inal A, Gurkan F, Orhan F, Yilmaz O, Boz AB, Tahan F, Cevit O. The reliability and validity of Turkish version of Childhood Asthma Control Test. Qual Life Res 2011; 21:685-90. [PMID: 21792732 DOI: 10.1007/s11136-011-9970-z] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/28/2011] [Indexed: 11/28/2022]
Abstract
INTRODUCTION The reliability and validity of Turkish version of Childhood Asthma Control Test (C-ACT). PURPOSE The management of asthma is an important as well as difficult issue of physician's daily practice particularly in busy clinical settings. C-ACT was created to identify asthma control levels in children aged 4-11 years. Our aim was to evaluate the reliability, validity and responsiveness of C-ACT in a Turkish sample of children with asthma. METHOD In this multicenter study, 368 children were enrolled. C-ACT was completed every month by parents and patients who were evaluated in 3 visits within 2 month intervals. At each visit, physicians interpret the control level and decided for the treatment step as established in GINA guidelines. RESULTS The internal consistency reliability of the Turkish version of C-ACT (C-ACT1 to C-ACT5) was found to be 0.82, 0.83, 0.82, 0.82 and 0.80, respectively (reliability statistics, Cronbach's alpha). Test-retest reliability was 0.71. There was significant correlation between C-ACT and physician's assessment of asthma control at visit 1 (r = 0.65, P < 0.001). CONCLUSIONS Turkish version of C-ACT is an accurate and reliable tool to evaluate asthma control in children aged 4-11 years. Its widespread use may facilitate appropriate assessment of asthma control and may lead to decrease the number of uncontrolled patients.
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Affiliation(s)
- B E Sekerel
- Faculty of Medicine, Pediatric Allergy and Asthma Unit, Hacettepe University, 06100, Ankara, Turkey.
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Gulluce M, Agar G, Aslan A, Karadayi M, Bozari S, Orhan F. Protective effects of methanol extracts from Cladonia rangiformis and Umbilicaria vellea against known mutagens sodium azide and 9-aminoacridine. Toxicol Ind Health 2011; 27:675-82. [DOI: 10.1177/0748233710395343] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Lichens and their various extracts have been occasionally used in the treatment of many diseases. Cladonia rangiformis and Umbilicaria vellea are two important species of these lichens and they have several biological activities. In the present study, methanol extracts of these lichens, which are grown in the Eastern Anatolia Region of Turkey, were isolated, and their mutagenic and antimutagenic properties were investigated by using AMES-Salmonella and Zea mays Root Tip Mitotic Index mutagenicity and antimutagenicity assay systems. Known mutagens sodium azide (NaN3) and 9-Aminoacridine (9-AA) were used to determine antimutagenic properties of methanol extracts. The results showed that all methanol extracts, investigated in the present study, can be considered genotoxically safe because they do not have mutagenic activity at the tested concentrations. Besides, all of them have antimutagenic activity against 9-AA known as a model intercalator agent in the AMES-Salmonella test system. The inhibition rates obtained from the antimutagenicity assays ranged from 37.07% (C. rangiformis—5 µg/plate) to 54.39% (C. rangiformis—5 µg/plate). Furthermore, all the methanol extracts have significant antimutagenic activity against NaN3 mutagenicity in Z. mays Root Tip Mitotic Index assay system. These activities are valuable towards an extension of the employ of these drugs as new phytotherapeutic or preservative ingredients.
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Affiliation(s)
- Medine Gulluce
- Department of Biology, Science Faculty, Atatürk University, Erzurum, Turkey
| | - Guleray Agar
- Department of Biology, Science Faculty, Atatürk University, Erzurum, Turkey
| | - Ali Aslan
- Department of Biology, Kazim Karabekir Education Faculty, Atatürk University, Erzurum, Turkey
| | - Mehmet Karadayi
- Department of Biology, Science Faculty, Atatürk University, Erzurum, Turkey,
| | - Sedat Bozari
- Department of Biology, Sciences and Arts Faculty, Mus Alparslan University, Mus, Turkey
| | - Furkan Orhan
- Institute of Natural and Applied Sciences, Atatürk University, Erzurum, Turkey
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Yilmaz O, Reisli I, Tahan F, Orhan F, Boz A, Yuksel H. Influence of education on primary care physicians' knowledge on childhood allergy as a systemic disease and the atopic march. Allergol Immunopathol (Madr) 2011; 39:73-8. [PMID: 21208716 DOI: 10.1016/j.aller.2010.03.012] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2010] [Revised: 03/09/2010] [Accepted: 03/21/2010] [Indexed: 10/18/2022]
Abstract
BACKGROUND There are many educational events for physicians in different countries covering one or some of the allergic diseases. Most of these educational events have been reported to improve care by the physicians. The aim of this study was to determine the baseline knowledge of general practitioners (GP) regarding the systemic nature of childhood allergy and atopic march, and to assess the influence of an educational event on this baseline knowledge. METHODS Two hundred and two GPs from five different cities in Turkey who attended education seminars were enrolled. All GPs were received the questionnaire both before and after the seminar. The questionnaire had statements about the systemic nature of childhood allergies and the atopic march, and GPs were asked to mark their degree of agreement as (completely true, partially true, wrong). RESULTS Mean age of GPs was 38.6±6.0 years. Mean duration after graduation from medical faculty was 13.9±6.5 years. There was significant improvement in answers after education. The statement "Frequency of allergic rhinitis and asthma is not as high as expected in children with atopic dermatitis" was regarded "wrong" by 60.9% but increased to 94.3% after the education (p<0.001). Systemic nature of allergy was approved by 72.8%, which increased to 99% after the education (p<0.001). Adrenalin as first line treatment in anaphylaxis treatment was appreciated by a higher number of GPs with the education (p<0.001). CONCLUSION Many GPs lack updated information about the systemic nature of paediatric allergic diseases and a single educational event may improve their knowledge significantly.
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Civelek E, Sahiner UM, Yüksel H, Boz AB, Orhan F, Uner A, Cakir B, Sekerel BE. Prevalence, burden, and risk factors of atopic eczema in schoolchildren aged 10-11 years: a national multicenter study. J Investig Allergol Clin Immunol 2011; 21:270-277. [PMID: 21721372] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Little is known about the epidemiology of atopic eczema (AE), and studies from the Mediterranean region and the Middle East are limited. OBJECTIVE We investigated the frequency, burden, and risk factors of AE in a developing country. METHODS The International Study of Asthma and Allergies in Childhood Phase II questionnaire was used to survey a representative sample of 10 to 11-year-old children in Turkey. Children were examined by allergists, and parents completed standardized questionnaires. RESULTS Among 6755 children, the prevalence of having eczema during one's lifetime or currently was 17.1% and 8.1%, respectively. The prevalence of visits to the doctor, nocturnal awakening, school absenteeism, and drug usage was 36.3%, 56%, 9.7%, and 28.7%, respectively. Associated factors were current rhinoconjunctivitis (odds ratio [OR], 2.53; 95% confidence interval [CI], 1.99-3.21), current wheezing (OR, 2.10; 95% CI, 1.58-2.79), family history of allergic disease (OR, 1.62; 95% CI, 1.21-2.18), low birth weight (OR, 1.79; 95% CI, 1.08-2.94), and exposure to animals in the first year of life (OR, 1.47; 95% CI, 1.06-2.03). CONCLUSIONS In a developing Mediterranean country, the prevalence of AE is comparable to that of developed countries in the same region and lower than that observed in developed countries elsewhere. The course of the disease and risk factors of AE probably differ in developing countries.
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Affiliation(s)
- E Civelek
- Hacettepe University Faculty of Medicine, Pediatric Allergy and Asthma Unit, Ankara, Turkey
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Gulluce M, Agar G, Baris O, Karadayi M, Orhan F, Sahin F. Mutagenic and antimutagenic effects of hexane extract of some Astragalus species grown in the eastern Anatolia region of Turkey. Phytother Res 2010; 24:1014-8. [PMID: 19957249 DOI: 10.1002/ptr.3059] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
Medical plants and their various extracts have been occasionally used in the treatment of many diseases. Astragalus is one of those medical plants and it has several biological activities. In the present study, the hexane extracts of six Astragalus species, which are grown in the eastern Anatolia region of Turkey, were isolated, and their mutagenic and antimutagenic properties were investigated by using Salmonella typhimurium TA1535, TA1537 and Escherichia coli WP2uvrA tester strains at 0.05, 0.5 and 5 microg/plate concentrations. Known mutagens sodium azide (NaN(3)), 9-Aminoacridine (9-AA) and N-Methyl-N'-nitro-N-nitrosoguanidine (MNNG) were used to determine antimutagenic properties of hexane extracts. The results showed that all hexane extracts, investigated in the present study, can be considered genotoxically safe because they do not have mutagenic activity at the tested concentrations. But, a great many of them have antimutagenic activity against 9-Aminoacridine known as a model intercalator agent. The inhibition rates obtained from the antimutagenicity assays ranged from 27.51% (A. macrocephalus--0.05 microg/plate) to 54.39% (A. galegiformis--5 microg/plate). These activities are valuable toward an extension of the employ of these drugs as new phytotherapeutic or preservative ingredients.
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Affiliation(s)
- Medine Gulluce
- Department of Biology, Science Faculty, Atatürk University, 25240 Erzurum, Turkey
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Cakici M, Catir M, Karabuga S, Kilic H, Ulukanli S, Gulluce M, Orhan F. Synthesis and biological evaluation of (S)-4-aminoquinazoline alcohols. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.tetasy.2010.05.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Sekerel B, Keskin O, Uzuner N, Yazicioglu M, Kilic M, Artac H, Ozmen S, Can D, Zeyrek D, Cokugras H, Soyer O, Sapan N, Aydogan M, Kuyucu S, Inal A, Gurkan F, Orhan F, Yilmaz O, Bingol Boz A, Tahan F, Cevit O. The Utility of Childhood Asthma Control Test and its Relationship with Control Measures and with the Decisions Made by Asthma Specialist. J Allergy Clin Immunol 2010. [DOI: 10.1016/j.jaci.2009.12.537] [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: 11/25/2022]
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Civelek E, Cakir B, Boz AB, Yuksel H, Orhan F, Uner A, Sekerel BE. Extent and burden of allergic diseases in elementary schoolchildren: a national multicenter study. J Investig Allergol Clin Immunol 2010; 20:280-288. [PMID: 20815305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/29/2023] Open
Abstract
BACKGROUND Scarcity of standardized, comparable data on allergic diseases in schoolchildren in Turkey requires further multicenter studies based on the use of objective tools in addition to parent-completed questionnaires to improve the validity and reliability of results. METHODS Using International Study of Asthma and Allergies in Children (ISAAC) Phase II tools, elementary schoolchildren aged 9 to 11 years were surveyed in 5 city centers in different regions of Turkey. RESULTS We surveyed 6963 children from 70 schools and found that 35% had had at least 1 symptom of allergic diseases in the past year. Based on parental reports, the overall prevalence rates for wheezing, rhinoconjunctivitis, and eczema in the past year were 15.8%, 23.5%, and 8.1%, respectively. The overall frequencies of atopy, flexural dermatitis, and bronchial hyperreactivity were 18.9%, 3.6%, and 24.2%, respectively. There were large variations in the prevalence of both symptoms and objective signs between study centers. Absence from school for at least 1 day was reported for 34.2% of children with a diagnosis of asthma or allergic rhinitis. CONCLUSIONS Approximately one third of elementary schoolchildren reported symptoms compatible with allergic diseases in the past year. The interregional differences in both symptoms and objective test results are possibly due to differences in environmental conditions. Unfortunately, serious problems are still encountered in the timely and proper diagnosis and treatment of allergic diseases.
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Affiliation(s)
- E Civelek
- Hacettepe University, Faculty of Medicine, Department of Pediatric Allergy and Asthma, Ankara, Turkey
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Orhan F, Karakas T, Cakir M, Aksoy A, Baki A, Gedik Y. Prevalence of immunoglobulin E-mediated food allergy in 6-9-year-old urban schoolchildren in the eastern Black Sea region of Turkey. Clin Exp Allergy 2009; 39:1027-35. [PMID: 19400894 DOI: 10.1111/j.1365-2222.2009.03263.x] [Citation(s) in RCA: 74] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
BACKGROUND The prevalence of adverse reactions to food in childhood in Turkey is not known. OBJECTIVE We aimed to investigate the prevalence and characteristics of IgE-mediated food allergies (FAs) in 6-9-year-old urban schoolchildren. METHODS This cross-sectional study recruited 3500 of the randomly selected 6-9-year-old urban schoolchildren from the eastern Black Sea region of Turkey during 2006. Following a self-administered questionnaire completed by the parents and the child, consenting children were invited for skin prick tests (SPTs) and oral food challenges. Children with suspected IgE-mediated FA were skin prick tested with a predefined panel of food allergens (milk, hen's egg, soy, wheat, peanut, fish, and hazelnut), aeroallergens (Dermatophagoides pteronyssinus, Dermatophagoides farinae, cat, dog, Alternaria, grass pollen mix, weed pollen mix, and tree pollen mix), and food allergens reported in the questionnaire. All children with a positive SPT to any food were invited for a double-blind, placebo-controlled food challenge (DBPCFC). The prevalence of IgE-mediated FA was established using DBPCFCs. RESULTS The response rate to the questionnaire was 78.2% (2739/3500). The estimated prevalence of parental-reported IgE-mediated FA was 5.7% (156/2739) [95% confidence interval (CI), 4.83-6.57%]. The rate of sensitization to the food allergens was 33.1% (48/145) in the parental-reported group. The confirmed prevalence of IgE-mediated FA by means of DBPCFC in 6-9-year-old urban schoolchildren living in the eastern Black Sea region of Turkey was 0.80% (22/2739) (95% CI, 0.47-1.13%). The most common allergenic foods were beef (31.8%), cow's milk (18.1%), cocoa (18.1%), hen's egg (13.6%), and kiwi (13.6%). CONCLUSIONS The rate of reported IgE-mediated FA was significantly higher than clinically confirmed FA by means of DBPCFC (odds ratio, 7.46; 95% CI, 4.67-12.01; P<0.0001). The order of allergenic foods was different and somewhat unique to the eastern Black Sea region of Turkey when compared with western countries.
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Affiliation(s)
- F Orhan
- Department of Pediatrics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey.
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Dilber E, Cakir M, Acar EA, Orhan F, Yaris N, Bahat E, Okten A, Erduran E. Crimean-Congo haemorrhagic fever among children in north-eastern Turkey. ACTA ACUST UNITED AC 2009; 29:23-8. [PMID: 19222930 DOI: 10.1179/146532809x401999] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
AIM To analyse the epidemiological and clinical features of children with Crimean-Congo haemorrhagic fever (CCHF) in north-eastern Turkey. METHODS A retrospective study of demographic features and physical and laboratory findings in 21 children with CCHF is described. Clinical course, treatment modalities and outcome were analysed. RESULTS Most patients were admitted in June and July 2008; most were from the Gumushane and Kelkit valleys and half of them lived in rural areas. Mean (SD) age was 10.3 (3.9) years and the disease was more common in males (71.4%). Approximately 70% had a history of tick bite. The main symptoms were fever (17, 80.9%), nausea (11, 52.3%), malaise (10, 47.6%) and headache (7, 33.3%). At initial examination, approximately 70% of patients had leukopenia and 65% had thrombocytopenia. Anaemia developed during follow-up in six patients. Liver involvement was seen in 12 patients and one patient had acute tubular necrosis. Six patients had haemophagocytosis. Patients were hospitalised for a median 8 days (range 3-22) and nine patients had bleeding from various sites approximately 3-5 days after hospitalisation. Subcutaneous haematoma (6), especially epistaxis and at venepuncture sites (6) were the most common sites of bleeding. Pulmonary haemorrhage developed in two patients and they required ventilatory support. Overall mortality related to CCHF was 4.7% (one patient). CONCLUSION Early diagnosis of CCHF and early referral to specialised centres are important for outcome. Exceptional epidemics may be seen in future owing to ecological and environmental changes.
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Affiliation(s)
- E Dilber
- Department of Pediatrics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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Orhan F, Karakas T. Food-dependent exercise-induced anaphylaxis to lentil and anaphylaxis to chickpea in a 17-year-old boy. J Investig Allergol Clin Immunol 2008; 18:465-468. [PMID: 19123439] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/27/2023] Open
Abstract
We report the case of a 17-year-old boy who experienced 4 episodes of exercise-induced anaphylactic reaction after ingestion of lentil and 2 episodes of anaphylaxis following ingestion of chickpea. His medical history revealed that he had allergic rhinitis with positive results after skin prick tests (SPT) with mites. His SPTs and specific immunoglobulin E antibody testing with lentil and chickpea were positive. Oral challenge with chickpea was not performed due to patient refusal. Treadmill exercise challenge tests in the fasting state and 1 hour after a meal not containing lentil were negative. However, an exercise challenge test 1 hour after intake of lentil soup resulted in pruritus of the hands, forearms, shoulders, and back, urticarial lesions on the face and shoulders, mild angioedema of the lips, and mild hoarseness and cough. To our knowledge, this is the first case of food-dependent exercise-induced anaphylaxis due to lentil.
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Affiliation(s)
- F Orhan
- Karadeniz Technical University Faculty of Medicine, Department of Pediatric Allergy, Trabzon, Turkey.
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Ruckebusch C, Orhan F, Durand A, Boubellouta T, Huvenne JP. Quantitative analysis of cotton-polyester textile blends from near-infrared spectra. Appl Spectrosc 2006; 60:539-44. [PMID: 16756705 DOI: 10.1366/000370206777412194] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/10/2023]
Abstract
Quantitative analysis of textile blends and textile fabrics is currently of particular interest in the industrial context. In this frame, this work investigates whether the use of Fourier transform (FT) near-infrared (NIR) spectroscopy and chemometrics is powerful for rapid and accurate quantitative analysis of cotton-polyester content in blend products. As samples of the same composition have many sources of variability that affect NIR spectra, indirect prediction is particularly challenging and a large sample population is required to design robust calibration models. Thus, a total of more than three-hundred cotton-polyester samples were selected covering the range from the 0% to 100% cotton and the corresponding NIR reflectance spectra were measured on raw fabrics. The data set obtained was used to develop multivariate models for quantitative prediction from reference measurements. A successful approach was found to rely on partial least squares (PLS) regression combined with genetic algorithms (GAs) for wavelength selection. It involved evaluating a set of calibration models considering different spectral regions. The results obtained considering 27.5% of the original variables yielded a prediction error (RMSEP) of 2.3 in percent cotton content. It demonstrates that FT-NIR spectroscopy has the potential to be used in the textile industry for the prediction of the composition of cotton-polyester blends. As a further consequence, it was observed that the spectral preprocessing and the complexity of the model are simplified compared to the full-spectrum approach. Also, the relevancy of the spectral intervals retained after variable selection can be discussed.
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Affiliation(s)
- C Ruckebusch
- Laboratoire de Spectrochimie Infrarouge et Raman (LASIR) UMR CNRS 8516, Bât.C5, Université des Sciences et Technologies de Lille (USTL) 59655 Villeneuve d'Ascq, France.
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Abstract
Although the clinical association of allergic rhinitis and asthma has been recognized for centuries, in recent years the association appears to be stronger than was reported previously. However, data for children are less clear, and some studies indicate that results observed in developing countries may differ from those observed in Western populations. We therefore intended to document the association of rhinitis with pediatric asthma in terms of caregivers' perception, physician practice, and file records. Asthmatic children aged 3-16 years with at least 1-year follow-up in an allergy-asthma outpatient clinic were invited to participate in the study during a 10-month interval. In addition to a face-to-face questionnaire-based interview, file records were evaluated retrospectively to obtain information relating to asthma and rhinitis. Of 396 patients included in the study, 369 with consistent replies were included in the analyses. The mean age of the study group was 10.6 +/- 0.2 (mean +/- SEM) years, and a greater proportion of the respondents were male (63.7%), atopic (78.3%), and mildly asthmatic (50.7%). House dust mite and grass pollens were the most commonly sensitized allergens (50.7% and 46.9%, respectively). Although only 5.4% of our study population regarded themselves as rhinitic and 23.8% had been diagnosed with allergic rhinitis according to the file records, almost 57.7% of patients had required medications for rhinitis within the last year, and 68.8% had findings consistent with allergic rhinitis. Furthermore, 41.2% and 58.8% reported that their rhinitis symptoms caused a significant burden in their daily life and exacerbated their asthma, respectively, and almost 50% felt that their rhinitis had not been given significant consideration by their physician. In conclusion, although we report a large discrepancy between caregivers' perception of rhinitis, documentation in file records, and treatments for rhinitis, the allergic rhinitis prevalence determined in the survey and the medication use for rhinitis appeared to be in agreement. We recommend a greater effort be made to identify, label, and educate children with rhinitis and their families in asthma outpatient clinics.
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Affiliation(s)
- C N Kocabas
- Pediatric Allergy and Asthma Unit, Hacettepe University Faculty of Medicine, Ankara, Turkey
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Civelek E, Kocabas C, Sackesen C, Orhan F, Tuncer A, Adalioglu G, Sekerel B. The burden of rhinitis in children with asthma. J Allergy Clin Immunol 2005. [DOI: 10.1016/j.jaci.2004.12.524] [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: 11/26/2022]
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Okten A, Mungan L, Orhan F, Cakir M. Hypothalamic hamartoma, cerebellar hypoplasia, facial dysmorphism and very atypical combination of polydactyly: is it a new variant of oro-facio-digital syndrome? Genet Couns 2005; 16:101-5. [PMID: 15844787] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
We describe a newborn with multiple congenital anomalies consistent with an oro-facio-digital syndrome (OFDS). These are a group of inherited syndromes that have in common anomalies of the tongue (bifid or lobulated tongue with hamartomas), the face (median cleft lip) and the digits (brachydactyly, polydactyly, clinodactyly and/or syndactyly). OFDS has been classified into 11 types. The case described in this paper had manifestations overlapping with OFDS II (Mohr) and OFDS IV (Mohr-Majewski) and OFDS VI (Varadi). We propose that the present patient has a new variation of the OFDS due to the co-existence of the very atypical combination of polydactyly, cerebellar hypoplasia, hypothalamic hamartoma and classical facial findings of OFDS.
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Affiliation(s)
- A Okten
- Department of Pediatrics, Faculty of Medicine Karadeniz Technical University, Trabzon, Turkey
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Affiliation(s)
- F Orhan
- K.T.U. Tip Fakultesi Pediatri A.D. Cocuk Allerji B.D. 61080 Trabzon Turkey.
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Affiliation(s)
- F Orhan
- Hacettepe University, Faculty of Medicine, Department of Pediatric Allergy & Asthma, Sihhiye 06100, Ankara, Turkey
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Abstract
BACKGROUND Although beef allergy has long been considered a rare condition, the number of studies regarding the nature, epidemiology, and symptoms of beef allergy has been increasing. We aimed to describe the results of allergy work-up of 12 patients who have a convincing history of acute allergic symptoms following beef ingestion. METHODS Detailed histories of 10 children and two adult relatives were obtained and patients underwent skin prick tests with commercial beef extract, raw beef and cooked beef. Serum total and beef-specific IgE were measured. Labial, and in selected cases, open food challenges were undertaken. RESULTS Interestingly, the rate of family history of beef allergy was 67% (8/12). Three patients (two with commercial extract, and one with cooked beef) had positive skin test responses to beef. Ten (83%) patients had elevated serum IgE concentrations (median 316.5 kU/l, range 9-1321 kU/l) and the beef-specific IgE was positive in all patients (median 6.23 kUA/l, range 0.83-36.6 kUA/l). Labial food challenge was positive in four (30%) patients. Of the five patients who underwent open food challenges, three were positive and two tolerated the beef administered. CONCLUSIONS We conclude that skin prick tests do not accurately diagnose IgE-mediated sensitization to beef. Thus, patients with suspected beef allergy should be screened additionally for beef-specific IgE antibodies, and in selected cases oral food challenge should be carried out to verify the diagnosis.
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Affiliation(s)
- F Orhan
- Hacettepe University Faculty of Medicine, Department of Pediatric Allergy and Asthma, Ankara, Turkey
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Abstract
AIMS To assess the effect of loratadine in exercise induced asthma. METHODS Randomised, double blind, placebo controlled study of 10 mg oral loratadine, once daily for three days in 11 children. At the end of the treatment period FEV(1) was measured, and patients were exercised on a treadmill. FEV(1) measurements were repeated at intervals after exercise. RESULTS Loratadine significantly reduced the decrease in FEV(1) after exercise at two, five, 10, 15, and 30 minutes, compared with placebo (p < 0.05). However, the mean decrease in FEV(1) at five minutes was more than 15% of baseline in the loratadine group. CONCLUSIONS Loratadine reduces, but does not prevent, exercise induced asthma in children.
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Affiliation(s)
- A Baki
- Department of Paediatrics, Faculty of Medicine, Karadeniz Technical University, Trabzon, Turkey
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