1
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Öztürk C, Kalay E, Gerni S, Balci N, Tokali FS, Aslan ON, Polat E. Sulfonamide derivatives with benzothiazole scaffold: Synthesis and carbonic anhydrase I-II inhibition properties. Biotechnol Appl Biochem 2024; 71:223-231. [PMID: 37964505 DOI: 10.1002/bab.2534] [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: 05/24/2023] [Accepted: 11/02/2023] [Indexed: 11/16/2023]
Abstract
The secondary sulfonamide derivatives containing benzothiazole scaffold (1-10) were synthesized to determine their inhibition properties on two physiologically essential human carbonic anhydrases isoforms (hCAs, EC, 4.2.1.1), hCA I, and hCA II. The inhibitory effects of the compounds on hCA I and hCA II isoenzymes were investigated by comparing their IC50 and Ki values. The Ki values of compounds (1-10) against hCA I and hCA II are in the range of 0.052 ± 0.022-0.971 ± 0.280 and 0.025 ± 0.010-0.682 ± 0.335, respectively. Some of these inhibited the enzyme more effectively than the standard drug, acetazolamide. In particular, compounds 5 and 4 were found to be most effective on hCA I and hCA II.
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Affiliation(s)
- Cansu Öztürk
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Erbay Kalay
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, Kars, Turkey
| | - Serpil Gerni
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
| | - Neslihan Balci
- Siran Dursun Keles Vocational School of Health Services, Gümüshane University, Gümüshane, Turkey
| | - Feyzi Sinan Tokali
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, Kars, Turkey
| | - Osman Nuri Aslan
- East Anatolian High Technology Application and Research Center, Atatürk University, Erzurum, Turkey
| | - Emrah Polat
- Department of Chemistry, Faculty of Science, Atatürk University, Erzurum, Turkey
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2
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Demir Y, Tokalı FS, Kalay E, Türkeş C, Tokalı P, Aslan ON, Şendil K, Beydemir Ş. Synthesis and characterization of novel acyl hydrazones derived from vanillin as potential aldose reductase inhibitors. Mol Divers 2023; 27:1713-1733. [PMID: 36103032 DOI: 10.1007/s11030-022-10526-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 09/03/2022] [Indexed: 10/14/2022]
Abstract
In the polyol pathway, aldose reductase (AR) catalyzes the formation of sorbitol from glucose. In order to detoxify some dangerous aldehydes, AR is essential. However, due to the effects of the active polyol pathway, AR overexpression in the hyperglycemic state leads to microvascular and macrovascular diabetic problems. As a result, AR inhibition has been recognized as a potential treatment for issues linked to diabetes and has been studied by numerous researchers worldwide. In the present study, a series of acyl hydrazones were obtained from the reaction of vanillin derivatized with acyl groups and phenolic Mannich bases with hydrazides containing pharmacological groups such as morpholine, piperazine, and tetrahydroisoquinoline. The resulting 21 novel acyl hydrazone compounds were investigated as an inhibitor of the AR enzyme. All the novel acyl hydrazones derived from vanillin demonstrated activity in nanomolar levels as AR inhibitors with IC50 and KI values in the range of 94.21 ± 2.33 to 430.00 ± 2.33 nM and 49.22 ± 3.64 to 897.20 ± 43.63 nM, respectively. Compounds 11c and 10b against AR enzyme activity were identified as highly potent inhibitors and showed 17.38 and 10.78-fold more effectiveness than standard drug epalrestat. The synthesized molecules' absorption, distribution, metabolism, and excretion (ADME) effects were also assessed. The probable-binding mechanisms of these inhibitors against AR were investigated using molecular-docking simulations.
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Affiliation(s)
- Yeliz Demir
- Department of Pharmacy Services, Nihat Delibalta Göle Vocational High School, Ardahan University, 75700, Ardahan, Turkey.
| | - Feyzi Sinan Tokalı
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, 36100, Kars, Turkey
| | - Erbay Kalay
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, 36100, Kars, Turkey.
| | - Cüneyt Türkeş
- Department of Biochemistry, Faculty of Pharmacy, Erzincan Binali Yıldırım University, 24002, Erzincan, Turkey
| | - Pelin Tokalı
- Department of Veterinary Physiology, Faculty of Veterinary Medicine, Kafkas University, 36100, Kars, Turkey
| | - Osman Nuri Aslan
- East Anatolian High Technology Application and Research Center, Atatürk University, 25240, Erzurum, Turkey
| | - Kıvılcım Şendil
- Department of Chemistry, Faculty of Arts and Science, Kafkas University, 36100, Kars, Turkey
| | - Şükrü Beydemir
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, 26470, Eskisehir, Turkey
- The Rectorate of Bilecik Şeyh Edebali University, 11230, Bilecik, Turkey
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3
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Özbek O, Kalay E, Cetin A, Isildak Ö, Sinan Tokalı F, Nuri Aslan O, Isildak I. Synthesis and Potentiometric Sensor Applications of a Hydrazone Derivative Molecule: Fast and Selective Determination of Cobalt(II) Ions. ChemistrySelect 2022. [DOI: 10.1002/slct.202201307] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Oguz Özbek
- Science and Technology, Application and Research Center Zonguldak Bülent Ecevit University 67600 Zonguldak Turkey
| | - Erbay Kalay
- Department of Material and Material Processing Technologies, Kars Vocational School Kafkas University Kars 36100 Turkey
| | - Alper Cetin
- Faculty of Science and Arts, Departmet of Molecular Biology and Genetics Zonguldak Bülent Ecevit University 67100 Zonguldak Turkey
| | - Ömer Isildak
- Department of Chemistry, Faculty of Science and Arts Tokat Gaziosmanpasa University 60250 Tokat Turkey
| | - Feyzi Sinan Tokalı
- Department of Material and Material Processing Technologies, Kars Vocational School Kafkas University Kars 36100 Turkey
| | - Osman Nuri Aslan
- Eastern Anatolia High Technology Application and Research Center Atatürk University Erzurum 25240 Turkey
| | - Ibrahim Isildak
- Department of Bioengineering, Faculty of Chemical and Metallurgical Engineering Yildiz Technical University 34220 Istanbul Turkey
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4
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Kalay E. Investigation of the activity of palladium nanoparticles supported on mesoporous graphitic carbon nitride in Heck and Suzuki cross-coupling reactions. SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2084416] [Citation(s) in RCA: 1] [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] [Indexed: 01/06/2023]
Affiliation(s)
- Erbay Kalay
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, Kars, Turkey
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5
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Tokalı FS, Demir Y, Demircioğlu İH, Türkeş C, Kalay E, Şendil K, Beydemir Ş. Synthesis, biological evaluation, and in silico study of novel library sulfonates containing quinazolin-4(3H)-one derivatives as potential aldose reductase inhibitors. Drug Dev Res 2022; 83:586-604. [PMID: 34585414 DOI: 10.1002/ddr.21887] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [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: 09/02/2021] [Revised: 09/16/2021] [Accepted: 09/18/2021] [Indexed: 12/12/2022]
Abstract
A series of novel sulfonates containing quinazolin-4(3H)-one ring derivatives was designed to inhibit aldose reductase (ALR2, EC 1.1.1.21). Novel quinazolinone derivatives (1-21) were synthesized from the reaction of sulfonated aldehydes with 3-amino-2-alkylquinazolin-4(3H)-ones in glacial acetic acid with good yields (85%-94%). The structures of the novel molecules were characterized using IR, 1 H-NMR, 13 C-NMR, and HRMS. All the novel quinazolinones (1-21) demonstrated nanomolar levels of inhibitory activity against ALR2 (KI s are in the range of 101.50-2066.00 nM). Besides, 4-[(2-isopropyl-4-oxoquinazolin-3[4H]-ylimino)methyl]phenyl benzenesulfonate (15) showed higher inhibitor activity inhibited ALR2 up to 7.7-fold compared to epalrestat, a standard inhibitor. Binding interactions between ALR2 and quinazolinones have been investigated using Schrödinger Small-Molecule Drug Discovery Suite 2021-1, reported possible inhibitor-ALR2 interactions. Both in vitro and in silico study results suggest that these quinazolin-4(3H)-one ring derivatives (1-21) require further molecular modification to improve their drug nominee potency as an ALR2 inhibitor.
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Affiliation(s)
- Feyzi Sinan Tokalı
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, Kars, Turkey
| | - Yeliz Demir
- Department of Pharmacy Services, Nihat Delibalta Göle Vocational High School, Ardahan University, Ardahan, Turkey
| | | | - Cüneyt Türkeş
- Department of Biochemistry, Faculty of Pharmacy, Erzincan Binali Yıldırım University, Erzincan, Turkey
| | - Erbay Kalay
- Department of Material and Material Processing Technologies, Kars Vocational School, Kafkas University, Kars, Turkey
| | - Kıvılcım Şendil
- Department of Chemistry, Faculty of Arts and Science, Kafkas University, Kars, Turkey
| | - Şükrü Beydemir
- Department of Biochemistry, Faculty of Pharmacy, Anadolu University, Eskişehir, Turkey
- The Rectorate of Bilecik Şeyh Edebali University, Bilecik, Turkey
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Kalay E, Dertli E, Şahin E. Biocatalytic asymmetric synthesis of (S)-1-indanol using Lactobacillus paracasei BD71. BIOCATAL BIOTRANSFOR 2021. [DOI: 10.1080/10242422.2021.2004133] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Enes Dertli
- Food Engineering Department, Chemical and Metallurgical Engineering Faculty, Yildiz Technical University, Istanbul, Turkey
| | - Engin Şahin
- Department of Nutrition and Dietetics, Faculty of Health Sciences, Bayburt University, Bayburt, Turkey
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Kalay E, Şahin E. Regioselective asymmetric bioreduction of trans-4-phenylbut-3-en-2-one by whole-cell of Weissella cibaria N9 biocatalyst. Chirality 2021; 33:535-542. [PMID: 34240754 DOI: 10.1002/chir.23337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [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: 03/22/2021] [Revised: 06/23/2021] [Accepted: 06/24/2021] [Indexed: 01/05/2023]
Abstract
There is a considerable interest in the asymmetric production of chiral allylic alcohols, the main building blocks of many functional molecules. The asymmetric reduction of α,β-unsaturated ketones is difficult with traditional chemical protocols in a regioselective and stereoselective manner. In this study, the reductive capacity of whole cell of Leuconostoc mesenteroides N6, Weissella paramesenteroides N7, Weissella cibaria N9, and Leuconostoc pseudomesenteroides N13 was investigated as whole-cell biocatalysts in the enantioselective reduction of (E)-4-phenylbut-3-en-2-one (1). The biocatalytic reduction of 1 to (S,E)-4-phenylbut-3-en-2-ol ((S,E)-2) using the whole cell of W. cibaria N9 isolated from Turkish sourdough was developed in a regioselective fashion, occurring with excellent conversion and recovering the product in good yield. In biocatalytic reduction reactions, the conversion of the substrate and the enantiomeric excess (ee) of the product are significantly affected by optimization parameters such as temperature, agitation rate, pH, and incubation time. Effects of these parameters on ee and conversion were investigated comprehensively. In addition, to our knowledge, this is the first report on production of (S,E)-2 using whole-cell biocatalyst in excellent yield, conversion with enantiopure form and at gram scale. These findings pave the way for the use of whole cell of W. cibaria N9 for challenging higher substrate concentrations of different α,β-unsaturated ketones for regioselective reduction at industrial scale.
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Affiliation(s)
- Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
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8
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Çolak NS, Kalay E, Şahin E. Asymmetric reduction of prochiral aromatic and hetero aromatic ketones using whole-cell of Lactobacillus senmaizukei biocatalyst. SYNTHETIC COMMUN 2021. [DOI: 10.1080/00397911.2021.1931337] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Affiliation(s)
- Nida Sezin Çolak
- Faculty of Engineering, Department of Food Engineering, Bayburt University, Bayburt, Turkey
| | - Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
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9
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Kalay E, Şahin E. Biocatalytic asymmetric synthesis of (R)-1-tetralol using Lactobacillus paracasei BD101. Chirality 2021; 33:447-453. [PMID: 33970507 DOI: 10.1002/chir.23318] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Revised: 04/19/2021] [Accepted: 04/26/2021] [Indexed: 11/10/2022]
Abstract
Asymmetric bioreduction of ketones is a fundamental process in the production of organic molecules. Compounds containing tetralone rings are found in the structure of many biologically active and pharmaceutical molecules. Biocatalytic reduction of ketones is one of the most promising and significant routes to prepare optically active alcohols. In this study, the reductive capacity of Lactobacillus paracasei BD101 was investigated as whole-cell biocatalyst in the enantioselective reduction of 1-tetralone (1). In biocatalytic reduction reactions, the conversion of the substrate and the enantiomeric excess (ee) of the product are significantly affected by optimization parameters such as temperature, agitation rate, pH, and incubation time. Effects of these parameters on ee and conversion were investigated comprehensively. (R)-1-tetralol ((R)-2), which can be used to treat disorder such as obsessive compulsive, post-traumatic stress, premenstrual dysphoric, and social anxiety, was manufactured in enantiopure form, high yield and gram-scale, using whole-cell biocatalysts of L. paracasei BD101. The 7.04 g of (R)-2 was obtained in optically pure form with 95% yield. Also, to our knowledge, this is the first report on production of (R)-2 using whole-cell biocatalyst in excellent yield, conversion, enantiopure form and gram scale. This is a clean, eco-friendly and cheap method for the synthesis of (R)-2 compared with chemical catalyst.
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Affiliation(s)
- Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
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10
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Öztürkkan Özbek FE, Uğurlu G, Kalay E, Necefoğlu H, Hökelek T. Theoretical and experimental assesment of structural, spectroscopic, electronic and nonlinear optical properties of two aroylhydrazone derivative. J Mol Struct 2021. [DOI: 10.1016/j.molstruc.2020.128982] [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: 10/23/2022]
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11
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Oguz M, Kalay E, Akocak S, Nocentini A, Lolak N, Boga M, Yilmaz M, Supuran CT. Synthesis of calix[4]azacrown substituted sulphonamides with antioxidant, acetylcholinesterase, butyrylcholinesterase, tyrosinase and carbonic anhydrase inhibitory action. J Enzyme Inhib Med Chem 2020; 35:1215-1223. [PMID: 32401067 PMCID: PMC7269057 DOI: 10.1080/14756366.2020.1765166] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 04/29/2020] [Accepted: 04/30/2020] [Indexed: 02/07/2023] Open
Abstract
A series of novel calix[4]azacrown substituted sulphonamide Schiff bases was synthesised by the reaction of calix[4]azacrown aldehydes with different substituted primary and secondary sulphonamides. The obtained novel compounds were investigated as inhibitors of six human (h) isoforms of carbonic anhydrases (CA, EC 4.2.1.1). Their antioxidant profile was assayed by various bioanalytical methods. The calix[4]azacrown substituted sulphonamide Schiff bases were also investigated as inhibitors of acetylcholinesterase (AChE), butyrylcholinesterase (BChE) and tyrosinase enzymes, associated with several diseases such as Alzheimer, Parkinson, and pigmentation disorders. The new sulphonamides showed low to moderate inhibition against hCAs, AChE, BChE, and tyrosinase enzymes. However, some of them possessed relevant antioxidant activity, comparable with standard antioxidants used in the study.
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Affiliation(s)
- Mehmet Oguz
- Department of Chemistry, University of Selcuk, Konya, Turkey
- Department of Advanced Material and Nanotechnology, Selcuk University, Konya, Turkey
| | - Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Suleyman Akocak
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Adiyaman University, Adiyaman, Turkey
| | - Alessio Nocentini
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche, Università degli Studi di Firenze, Florence, Italy
| | - Nebih Lolak
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Adiyaman University, Adiyaman, Turkey
| | - Mehmet Boga
- Department of Analytical Chemistry, Faculty of Pharmacy, Dicle University, Diyarbakir, Turkey
| | - Mustafa Yilmaz
- Department of Chemistry, University of Selcuk, Konya, Turkey
| | - Claudiu T. Supuran
- NEUROFARBA Department, Sezione di Scienze Farmaceutiche, Università degli Studi di Firenze, Florence, Italy
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Baydaş Y, Kalay E, Şahin E. Production of enantiomerically enriched chiral carbinols using whole-cell biocatalyst. BIOCATAL BIOTRANSFOR 2020. [DOI: 10.1080/10242422.2020.1837782] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- Yasemin Baydaş
- Faculty of Engineering, Department of Food Engineering, Bayburt University, Bayburt, Turkey
| | - Erbay Kalay
- Kars Vocational School, Kafkas University, Kars, Turkey
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
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Kalay E, Küçükkeçeci H, Kilic H, Metin Ö. Black phosphorus as a metal-free, visible-light-active heterogeneous photoredox catalyst for the direct C-H arylation of heteroarenes. Chem Commun (Camb) 2020; 56:5901-5904. [PMID: 32342073 DOI: 10.1039/d0cc01874k] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Black phosphorus (BP) is for the first time employed as a metal-free, heterogeneous photoredox catalyst for the direct C-H arylation of heteroarenes with aryl diazonium salts. The arylated heteroarenes are obtained in moderate to good yields under visible-light illumination, and the protocol is shown to be applicable for the scale-up synthesis.
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Affiliation(s)
- Erbay Kalay
- Department of Chemistry, Koç University, 34450, Sarıyer, Istanbul, Turkey.
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14
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Taşdemir V, Kalay E, Dertli E, Şahin E. Bio-catalytic asymmetric synthesis of β-adrenergic receptor blocker precursor: (R)-2-bromo-1-(naphthalen-2-yl)ethanol. BIOCATAL BIOTRANSFOR 2020. [DOI: 10.1080/10242422.2020.1768245] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
Affiliation(s)
- Volkan Taşdemir
- Science Research and Applied Center, Van Yüzüncü yıl University, Van, Turkey
| | - Erbay Kalay
- Kars Vacational School, Kafkas University, Kars, Turkey
| | - Enes Dertli
- Chemical and Metallurgical Engineering Faculty, Food Engineering Department, Yildiz Technical University, Esenler, Istanbul
| | - Engin Şahin
- Faculty of Health Sciences, Department of Nutrition and Dietetics, Bayburt University, Bayburt, Turkey
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15
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Kalay E, Cetin S, Kolemen S, Metin Ö. A facile synthesis of mesoporous graphitic carbon nitride supported palladium nanoparticles as highly effective and reusable catalysts for Stille coupling reactions under mild conditions. NEW J CHEM 2020. [DOI: 10.1039/d0nj00546k] [Citation(s) in RCA: 7] [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] [Indexed: 12/15/2022]
Abstract
This paper reports a facile one-pot synthesis of mesoporous graphitic carbon nitride (mpg-CN) supported Pd NPs, denoted as mpg-CN/Pd, as highly efficient catalysts for Stille C–C coupling reactions under mild conditions.
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Affiliation(s)
- Erbay Kalay
- Deparment of Chemistry
- College of Sciences
- Koç University
- 34450 Istanbul
- Turkey
| | - Sultan Cetin
- Deparment of Chemistry
- College of Sciences
- Koç University
- 34450 Istanbul
- Turkey
| | - Safacan Kolemen
- Deparment of Chemistry
- College of Sciences
- Koç University
- 34450 Istanbul
- Turkey
| | - Önder Metin
- Deparment of Chemistry
- College of Sciences
- Koç University
- 34450 Istanbul
- Turkey
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16
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Affiliation(s)
- Mustafa Z. Kazancioglu
- Yusuf Serefoglu Faculty of Health SciencesKilis 7 Aralik University 79090 Kilis Turkey
- Advanced Technology Application and Research CenterKilis 7 Aralik University 79090 Kilis Turkey
| | - Erbay Kalay
- Kars Vocational SchoolKafkas University 36100 Kars Turkey
| | - Elif Akin Kazancioglu
- Advanced Technology Application and Research CenterKilis 7 Aralik University 79090 Kilis Turkey
- Vocational High School of Health ServicesKilis 7 Aralik University 79090 Kilis Turkey
| | - Vsevolod A. Peshkov
- Department of ChemistrySchool of Science and TechnologyNazarbayev University 53 Kabanbay Batyr Ave, Block 7 Nur-Sultan 010000 Republic of Kazakhstan
- The Environment and Resource Efficiency Cluster (EREC)Nazarbayev University Nur-Sultan Republic of Kazakhstan
- College of ChemistryChemical Engineering and Materials ScienceSoochow University, Dushu Lake Campus Suzhou 215123 P. R. China
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17
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Kalay E, Kılıç H, Catir M, Cakici M, Kazaz C. Generation of singlet oxygen (1O2) from hydrogen peroxide decomposition by in situ generated hypervalent iodoarene reagents. PURE APPL CHEM 2014. [DOI: 10.1515/pac-2013-0812] [Citation(s) in RCA: 5] [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
AbstractA novel method for the production of singlet oxygen from H2O2 was developed. A combination of iodoarene (ArI), methyltrioxorhenium (MTO), and H2O2 in the presence of pyridine as the co-catalyst efficiently produced singlet molecular oxygen (1O2) under biphasic conditions. The existence of 1O2 was demonstrated by trapping experiments with aromatic dienes, 1,3-cyclodienes, and alkenes. The mechanism of 1O2 production from the iodoarene/MTO/35 % H2O2 system and the reaction scope was also discussed.
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Affiliation(s)
- Erbay Kalay
- 1Faculty of Science, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey
| | - Hamdullah Kılıç
- 1Faculty of Science, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey
| | - Mustafa Catir
- 2Faculty of Arts and Sciences, Department of Chemistry, Erzincan University, 24100 Erzincan, Turkey
| | - Murat Cakici
- 1Faculty of Science, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey
| | - Cavit Kazaz
- 1Faculty of Science, Department of Chemistry, Ataturk University, 25240 Erzurum, Turkey
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18
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White SJ, Vissers LELM, Geurts van Kessel A, de Menezes RX, Kalay E, Lehesjoki AE, Giordano PC, van de Vosse E, Breuning MH, Brunner HG, den Dunnen JT, Veltman JA. Variation of CNV distribution in five different ethnic populations. Cytogenet Genome Res 2007; 118:19-30. [PMID: 17901696 DOI: 10.1159/000106437] [Citation(s) in RCA: 36] [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] [Received: 12/14/2006] [Accepted: 03/12/2007] [Indexed: 12/12/2022] Open
Abstract
Recent studies have revealed a new type of variation in the human genome encompassing relatively large genomic segments ( approximately 100 kb-2.5 Mb), commonly referred to as copy number variation (CNV). The full nature and extent of CNV and its frequency in different ethnic populations is still largely unknown. In this study we surveyed a set of 12 CNVs previously detected by array-CGH. More than 300 individuals from five different ethnic populations, including three distinct European, one Asian and one African population, were tested for the occurrence of CNV using multiplex ligation-dependent probe amplification (MLPA). Seven of these loci indeed showed CNV, i.e., showed copy numbers that deviated from the population median. More precise estimations of the actual genomic copy numbers for (part of) the NSF gene locus, revealed copy numbers ranging from two to at least seven. Additionally, significant inter-population differences in the distribution of these copy numbers were observed. These data suggest that insight into absolute DNA copy numbers for loci exhibiting CNV is required to determine their potential contribution to normal phenotypic variation and, in addition, disease susceptibility.
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Affiliation(s)
- S J White
- Center for Human and Clinical Genetics, Leiden University Medical Center, Leiden, The Netherlands
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Kalay E, Caylan R, Kiroglu AF, Yasar T, Collin RWJ, Heister JGAM, Oostrik J, Cremers CWRJ, Brunner HG, Karaguzel A, Kremer H. A novel locus for autosomal recessive nonsyndromic hearing impairment, DFNB63, maps to chromosome 11q13.2-q13.4. J Mol Med (Berl) 2007; 85:397-404. [PMID: 17211611 DOI: 10.1007/s00109-006-0136-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2006] [Revised: 10/19/2006] [Accepted: 10/25/2006] [Indexed: 01/28/2023]
Abstract
Hereditary hearing impairment is a genetically heterogeneous disorder. To date, 49 autosomal recessive nonsyndromic hearing impairment (ARNSHI) loci have been described, and there are more than 16 additional loci announced. In 25 of the known loci, causative genes have been identified. A genome scan and fine mapping revealed a novel locus for ARNSHI (DFNB63) on chromosome 11q13.2-q13.4 in a five-generation Turkish family (TR57). The homozygous linkage interval is flanked by the markers D11S1337 and D11S2371 and spans a 5.3-Mb interval. A maximum two-point log of odds score of 6.27 at a recombination fraction of theta = 0.0 was calculated for the marker D11S4139. DFNB63 represents the eighth ARNSHI locus mapped to chromosome 11, and about 3.33 Mb separate the DFNB63 region from MYO7A (DFNB2/DFNB11). Sequencing of coding regions and exon-intron boundaries of 13 candidate genes, namely SHANK2, CTTN, TPCN2, FGF3, FGF4, FGF19, FCHSD2, PHR1, TMEM16A, RAB6A, MYEOV, P2RY2 and KIAA0280, in genomic DNA from an affected individual of family TR57 revealed no disease-causing mutations.
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Affiliation(s)
- E Kalay
- Department of Human Genetics, Radboud University Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Kalay E, de Brouwer APM, Caylan R, Nabuurs SB, Wollnik B, Karaguzel A, Heister JGAM, Erdol H, Cremers FPM, Cremers CWRJ, Brunner HG, Kremer H. A novel D458V mutation in the SANS PDZ binding motif causes atypical Usher syndrome. J Mol Med (Berl) 2005; 83:1025-32. [PMID: 16283141 DOI: 10.1007/s00109-005-0719-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [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: 02/21/2005] [Accepted: 07/12/2005] [Indexed: 10/25/2022]
Abstract
Homozygosity mapping and linkage analysis in a Turkish family with autosomal recessive prelingual sensorineural hearing loss revealed a 15-cM critical region at 17q25.1-25.3 flanked by the polymorphic markers D17S1807 and D17S1806. The maximum two-point lod score was 4.07 at theta=0.0 for the marker D17S801. The linkage interval contains the Usher syndrome 1G gene (USH1G) that is mutated in patients with Usher syndrome (USH) type 1g and encodes the SANS protein. Mutation analysis of USH1G led to the identification of a homozygous missense mutation D458V at the -3 position of the PDZ binding motif of SANS. This mutation was also present homozygously in one out of 64 additional families from Turkey with autosomal recessive nonsyndromic hearing loss and heterozygously in one out of 498 control chromosomes. By molecular modeling, we provide evidence that this mutation impairs the interaction of SANS with harmonin. Ophthalmologic examination and vestibular evaluation of patients from both families revealed mild retinitis pigmentosa and normal vestibular function. These results suggest that these patients suffer from atypical USH.
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Affiliation(s)
- E Kalay
- Department of Human Genetics, Radboud University Nijmegen Medical Centre, P.O. Box 9101, 6500 HB Nijmegen, The Netherlands.
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Kalay E, Karaguzel A, Caylan R, Heister A, Cremers FPM, Cremers CWRJ, Brunner HG, de Brouwer APM, Kremer H. Four novelTMC1 (DFNB7/DFNB11) mutations in Turkish patients with congenital autosomal recessive nonsyndromic hearing loss. Hum Mutat 2005; 26:591. [PMID: 16287143 DOI: 10.1002/humu.9384] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Mutations in the transmembrane channel-like gene 1 (TMC1) cause prelingual autosomal recessive (DFNB7/11) and postlingual progressive autosomal dominant (DFNA36) nonsyndromic hearing loss. To determine the genetic causes of autosomal recessive nonsyndromic hearing loss (ARNSHL) in the northeast and east of Turkey, 65 unrelated families without mutations in the protein coding region of the GJB2 (GJB2-negative) were analyzed. A genomewide scan for homozygosity and linkage analysis in one of these families revealed a 13.2 cM critical region between D9S273 and D9S153 at chromosome 9p13.2-q21.31 with a maximum two-point lod score of 4.00 at theta=0.0 for marker D9S175. TMC1 is in this critical region. Homozygosity screening with intragenic markers for TMC1 in the remaining 64 families suggested involvement of this gene in three additional families. Subsequent sequencing of TMC1 in these four families revealed four novel homozygous mutations, c.776A>G [p.Tyr259Cys], c.821C>T [p.Pro274Leu], c.1334G>A [p.Arg445His], and c.1083_1087delCAGAT [p.Arg362ProfrX6]. Our results indicate that TMC1 mutations account for at least 6% (4/65) of ARNSHL in GJB2-negative Turkish families from the northeast and east of Turkey.
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Affiliation(s)
- E Kalay
- Department of Human Genetics, Radboud University, Nijmegen Medical Centre, Nijmegen, The Netherlands.
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Abstract
HLA class I and class II alleles were studied for the first time in 234 unrelated individuals inhabiting the East Black Sea region in Turkey. This region is on the historic silk road and close to Georgia. HLA class I (A* and B*) and class II DRB1* typing was done by the PCR-SSP method. A total of 17 HLA-A* alleles, 34 HLA-B* alleles, and 15 HLA-DRB1* alleles were detected. HLA-A*-B*, A*-DRB1*, and B*-DRB1* two-loci linkage disequilibrium data show that two specific combinations (A2-B35, A2-DRB1*11, and B35-DRB1*13) had the highest frequency (more than three or four times) compared with the other two-loci combinations, possibly reflecting an ancient founder effect. A*24 B*18 DRB1*13 and A*32 B*27 DRB1*11 were the most common haplotypes in the east Black sea Turkish population. HLA-B* showed the highest heterozygosity (94%) among the samples. The observed diversity in the HLA-A* and HLA-DRB1* loci was quite similar, ranging from 79% to 84%. We suggest that the east Black Sea Turkish population is characterized by the features of the Turkish anthropological type with some influence of other groups, such as Caucasians, Asians, and Mediterraneans.
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Affiliation(s)
- F Uçar
- Karadeniz Technical University, Faculty of Medicine, Department of Medical Biology & Genetics, 61080 Trabzon, Turkey.
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