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Xie L, Wu H, Huang X, Yu T. Melatonin, a natural antioxidant therapy in spinal cord injury. Front Cell Dev Biol 2023; 11:1218553. [PMID: 37691830 PMCID: PMC10485268 DOI: 10.3389/fcell.2023.1218553] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2023] [Accepted: 08/11/2023] [Indexed: 09/12/2023] Open
Abstract
Spinal cord injury (SCI) is a sudden onset of disruption to the spinal neural tissue, leading to loss of motor control and sensory function of the body. Oxidative stress is considered a hallmark in SCI followed by a series of events, including inflammation and cellular apoptosis. Melatonin was originally discovered as a hormone produced by the pineal gland. The subcellular localization of melatonin has been identified in mitochondria, exhibiting specific onsite protection to excess mitochondrial reactive oxygen species and working as an antioxidant in diseases. The recent discovery regarding the molecular basis of ligand selectivity for melatonin receptors and the constant efforts on finding synthetic melatonin alternatives have drawn researchers' attention back to melatonin. This review outlines the application of melatonin in SCI, including 1) the relationship between the melatonin rhythm and SCI in clinic; 2) the neuroprotective role of melatonin in experimental traumatic and ischemia/reperfusion SCI, i.e., exhibiting anti-oxidative, anti-inflammatory, and anti-apoptosis effects, facilitating the integrity of the blood-spinal cord barrier, ameliorating edema, preventing neural death, reducing scar formation, and promoting axon regeneration and neuroplasticity; 3) protecting gut microbiota and peripheral organs; 4) synergizing with drugs, rehabilitation training, stem cell therapy, and biomedical material engineering; and 5) the potential side effects. This comprehensive review provides new insights on melatonin as a natural antioxidant therapy in facilitating rehabilitation in SCI.
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Affiliation(s)
- Lei Xie
- Institute of Sports Medicine and Health, Qingdao University, Qingdao, China
- Department of Orthopedic Surgery, Qingdao Hospital, University of Health and Rehabilitation Sciences (Qingdao Municipal Hospital), Qingdao, China
| | - Hang Wu
- Department of Orthopedic Surgery, Qingdao Hospital, University of Health and Rehabilitation Sciences (Qingdao Municipal Hospital), Qingdao, China
- Department of Orthopedic Surgery, The Affiliated Hospital of Qingdao University, Qingdao University, Qingdao, China
| | - Xiaohong Huang
- Department of Orthopedic Surgery, Qingdao Hospital, University of Health and Rehabilitation Sciences (Qingdao Municipal Hospital), Qingdao, China
- Shandong Institute of Traumatic Orthopedics, Medical Research Center, The Affiliated Hospital of Qingdao University, Qingdao, China
| | - Tengbo Yu
- Institute of Sports Medicine and Health, Qingdao University, Qingdao, China
- Department of Orthopedic Surgery, Qingdao Hospital, University of Health and Rehabilitation Sciences (Qingdao Municipal Hospital), Qingdao, China
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Zhang L, Ding F, Wu X, Wang R, Wan Y, Hu J, Zhang X, Wu Q. Melatonin ameliorates glyphosate- and hard water-induced renal tubular epithelial cell senescence via PINK1-Parkin-dependent mitophagy. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 255:114719. [PMID: 37032573 DOI: 10.1016/j.ecoenv.2023.114719] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 02/14/2023] [Accepted: 02/28/2023] [Indexed: 06/19/2023]
Abstract
The combination of glyphosate (Gly) and hard water (Hwt) is a suspected risk factor for chronic interstitial nephritis in agricultural communities (CINAC). Accumulated mitochondrial damage and proximal tubular epithelial (PTE) cell senescence have been implicated in CINAC pathogenesis. Melatonin (Mel) has potential mitochondrial function and renoprotective properties, but its role and mechanism in CINAC are unknown. Here, we detected PTE cell senescence and PTEN-induced putative protein kinase 1 (PINK1)-parkin RBR E3 ubiquitin protein ligase (Parkin)-dependent mitophagy in mice orally administered with different doses of Gly combined with Hwt (Gly: 100 mg/kg·bw and 0.7 mg/L; Hwt: 2,500 mg/L CaCO3 and 250 mg/L Ca2+) for different durations (12 and 36 w) using histological examination, transmission electron microscopy (TEM), immunofluorescence (IF) analysis, and immunohistochemistry (IHC), immunoblotting, ELISA and biochemical assays with kits. The same assays were performed after combination treatment with Mdivi-1 (an inhibitor of mitophagy, i.p. 10 mg/kg·bw, twice a week for 12 w) or Mel (i.p. 10 mg/kg·bw, once a day for 12 w) under high-level exposure. Gly combined with Hwt (Gly-Hwt) significantly increased P16-P21-dependent PTE cell senescence, mitochondrial fission and oxidative stress, and activated PINK1-Parkin-mediated mitophagy, accompanied by defective autophagic flux at high doses but unaltered autophagic flux at low doses. Improved senescence occurred after Mdivi-1 administration, suggesting that mitophagy is involved in cellular senescence. Mel significantly decreased senescence induced by Gly-Hwt. Furthermore, PINK1-Parkin-dependent mitophagy and autophagic flux were markedly enhanced, and mitochondrial function was improved, as evidenced by reductions in mitochondrial fission and subsequent oxidative damage. Thus, Gly and Hwt synergistically promote PTE cell senescence through PINK1-Parkin-mediated mitophagy, and Mel exerts renoprotective effects by modulating mitophagy, suggesting therapeutic applications in ageing-related CINAC.
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Affiliation(s)
- Lin Zhang
- School of Public Health, Fudan University, Shanghai, China; Key Laboratory of Children's Environmental Health, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Fan Ding
- School of Public Health, Fudan University, Shanghai, China
| | - Xuan Wu
- School of Public Health, Fudan University, Shanghai, China
| | - Ruojing Wang
- School of Public Health, Fudan University, Shanghai, China
| | - Yi Wan
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Jianying Hu
- Laboratory for Earth Surface Processes, College of Urban and Environmental Sciences, Peking University, Beijing, China
| | - Xiaoyan Zhang
- Department of Nephrology, Zhongshan Hospital of Fudan University, Shanghai, China.
| | - Qing Wu
- School of Public Health, Fudan University, Shanghai, China.
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Verma AK, Singh S, Rizvi SI. Therapeutic potential of melatonin and its derivatives in aging and neurodegenerative diseases. Biogerontology 2023; 24:183-206. [PMID: 36550377 DOI: 10.1007/s10522-022-10006-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2022] [Accepted: 12/13/2022] [Indexed: 12/24/2022]
Abstract
Aging is associated with increasing impairments in brain homeostasis and represents the main risk factor across most neurodegenerative disorders. Melatonin, a neuroendocrine hormone that regulates mammalian chronobiology and endocrine functions is well known for its antioxidant potential, exhibiting both cytoprotective and chronobiotic abilities. Age-related decline of melatonin disrupting mitochondrial homeostasis and cytosolic DNA-mediated inflammatory reactions in neurons is a major contributory factor in the emergence of neurological abnormalities. There is scattered literature on the possible use of melatonin against neurodegenerative mechanisms in the aging process and its associated diseases. We have searched PUBMED with many combinations of key words for available literature spanning two decades. Based on the vast number of experimental papers, we hereby review recent advancements concerning the potential impact of melatonin on cellular redox balance and mitochondrial dynamics in the context of neurodegeneration. Next, we discuss a broader explanation of the involvement of disrupted redox homeostasis in the pathophysiology of age-related diseases and its connection to circadian mechanisms. Our effort may result in the discovery of novel therapeutic approaches. Finally, we summarize the current knowledge on molecular and circadian regulatory mechanisms of melatonin to overcome neurodegenerative diseases (NDDs) such as Alzheimer's, Parkinson's, Huntington's disease, and amyotrophic lateral sclerosis, however, these findings need to be confirmed by larger, well-designed clinical trials. This review is also expected to uncover the associated molecular alterations in the aging brain and explain how melatonin-mediated circadian restoration of neuronal homeodynamics may increase healthy lifespan in age-related NDDs.
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Affiliation(s)
- Avnish Kumar Verma
- Department of Biochemistry, University of Allahabad, Allahabad, 211002, India
| | - Sandeep Singh
- Biological Psychiatry Laboratory, Hadassah Medical Center - Hebrew University, Jerusalem, Israel
| | - Syed Ibrahim Rizvi
- Department of Biochemistry, University of Allahabad, Allahabad, 211002, India.
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Habib I, Singha K, Hossain M. Transition metal-free C–H activation of heteroarenes: an overview (2018–2022). SYNTHETIC COMMUN 2022. [DOI: 10.1080/00397911.2022.2155837] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Imran Habib
- Synthetic Organic Research Laboratory, UGC-HRDC (Chemistry), University of North Bengal, Darjeeling, West Bengal, India
| | - Koustav Singha
- Synthetic Organic Research Laboratory, UGC-HRDC (Chemistry), University of North Bengal, Darjeeling, West Bengal, India
| | - Mossaraf Hossain
- Synthetic Organic Research Laboratory, UGC-HRDC (Chemistry), University of North Bengal, Darjeeling, West Bengal, India
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Antifungal Peptide P852 Controls Fusarium Wilt in Faba Bean (Viciafaba L.) by Promoting Antioxidant Defense and Isoquinoline Alkaloid, Betaine, and Arginine Biosyntheses. Antioxidants (Basel) 2022; 11:antiox11091767. [PMID: 36139841 PMCID: PMC9495604 DOI: 10.3390/antiox11091767] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2022] [Revised: 09/02/2022] [Accepted: 09/05/2022] [Indexed: 11/24/2022] Open
Abstract
Green pesticides are highly desirable, as they are environmentally friendly and efficient. In this study, the antifungal peptide P852 was employed to suppress Fusarium wilt in the Faba bean. The disease index and a range of physiological and metabolomic analyses were performed to explore the interactions between P852 and the fungal disease. The incidence and disease index of Fusarium wilt were substantially decreased in diseased Faba beans that were treated with two different concentrations of P852 in both the climate chamber and field trial. For the first time, P852 exhibited potent antifungal effects on Fusarium in an open field condition. To explore the mechanisms that underlie P852′s antifungal effects, P852 treatment was found to significantly enhance antioxidant enzyme capacities including guaiacol peroxidase (POD), superoxide dismutase (SOD), catalase (CAT), and the activities of antifungal enzymes including chitinase and β-1,3-glucanase, as well as plant dry and fresh weights, and chlorophyll content compared to the control group (p ≤ 0.05). Metabolomics analysis of the diseased Faba bean treated with P852 showed changes in the TCA cycle, biological pathways, and many primary and secondary metabolites. The Faba bean treated with a low concentration of P852 (1 μg/mL, IC50) led to upregulated arginine and isoquinoline alkaloid biosynthesis, whereas those treated with a high concentration of P852 (10 μg/mL, MFC) exhibited enhanced betaine and arginine accumulation. Taken together, these findings suggest that P852 induces plant tolerance under Fusarium attack by enhancing the activities of antioxidant and antifungal enzymes, and restoring plant growth and development.
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Potentiating the Benefits of Melatonin through Chemical Functionalization: Possible Impact on Multifactorial Neurodegenerative Disorders. Int J Mol Sci 2021; 22:ijms222111584. [PMID: 34769013 PMCID: PMC8583879 DOI: 10.3390/ijms222111584] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2021] [Revised: 10/08/2021] [Accepted: 10/11/2021] [Indexed: 12/11/2022] Open
Abstract
Although melatonin is an astonishing molecule, it is possible that chemistry will help in the discovery of new compounds derived from it that may exceed our expectations regarding antioxidant protection and perhaps even neuroprotection. This review briefly summarizes the significant amount of data gathered to date regarding the multiple health benefits of melatonin and related compounds. This review also highlights some of the most recent directions in the discovery of multifunctional pharmaceuticals intended to act as one-molecule multiple-target drugs with potential use in multifactorial diseases, including neurodegenerative disorders. Herein, we discuss the beneficial activities of melatonin derivatives reported to date, in addition to computational strategies to rationally design new derivatives by functionalization of the melatonin molecular framework. It is hoped that this review will promote more investigations on the subject from both experimental and theoretical perspectives.
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Cu(II) complex with auxin (3-indoleacetic acid) and an aromatic planar ligand: synthesis, crystal structure, biomolecular interactions and radical scavenging activity. EUROPEAN BIOPHYSICS JOURNAL : EBJ 2021; 50:771-785. [PMID: 33929571 DOI: 10.1007/s00249-021-01525-5] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/15/2020] [Revised: 08/26/2020] [Accepted: 03/25/2021] [Indexed: 10/21/2022]
Abstract
A novel water soluble ternary copper(II) complex,-[Cu2(phen)2(3-IAA)2(H2O)](ClO4)2·H2O-(phen: 1,10-phenanthroline, 3-IAA: 3-indoleacetic acid), has been synthesized and characterized by elemental CHN analysis, ESI-TOF, FTIR and single-crystal X-ray diffraction techniques. Interaction of the complex with calf thymus DNA (CT-DNA) has been investigated by absorption spectral titration, ethidium bromide (EB) and Hoechst 33258 displacement assay. The interactions between the complex and bovine serum albumin (BSA) were investigated by electronic absorption and fluorescence spectroscopy methods. The experimental results indicate that the fluorescence quenching mechanism between the complex and BSA is a static quenching process. The Stern-Volmer constants, binding constants, binding sites and the corresponding thermodynamic parameters (ΔG, ΔH, ΔS) of BSA + complex systems were determined at different temperatures. The binding distance between the complex and BSA was calculated according to Förster non-radiation energy transfer theory (FRET). The effect of the complex on the conformation of BSA was also examined using synchronous, two dimensional (2D) and three dimensional (3D) fluorescence spectroscopy. Furthermore, the oxygen radical scavenging activity of the complex was determined in terms of IC50, using the DPPH and H2O2 method, to show that it particularly enables electron loss from radical species. This study highlights the importance of indole and moieties in the development of antioxidant agents. A potent drug candidate novel water soluble ternary copper(II) complex,-[Cu2(phen)2(3-IAA)2(H2O)] (ClO4)2·H2O-(phen: 1,10-phenanthroline, 3-IAA: 3-indoleacetic acid), has been synthesized and characterized by elemental CHN analysis, FTIR, ESI-MS and single-crystal X-ray diffraction techniques. The complex has been tested for in vitro biomacromolecular interactions by spectroscopic methods. Furthermore, radical scavenging activities of the complex were also investigated.
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Elewa SI, Fatthallah NA, Nessim MI, El-Farargy AF. Synthesis and characterization of some tetrazoles and their prospective for aerobic micro-fouling mitigation. ARAB J CHEM 2020. [DOI: 10.1016/j.arabjc.2020.10.005] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Wei W, Ma N, Fan X, Yu Q, Ci X. The role of Nrf2 in acute kidney injury: Novel molecular mechanisms and therapeutic approaches. Free Radic Biol Med 2020; 158:1-12. [PMID: 32663513 DOI: 10.1016/j.freeradbiomed.2020.06.025] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2020] [Revised: 05/24/2020] [Accepted: 06/11/2020] [Indexed: 12/13/2022]
Abstract
Acute kidney injury (AKI) is a common clinical syndrome that is related to high morbidity and mortality. Oxidative stress, including the production of reactive oxygen species (ROS), appears to be the main element in the occurrence of AKI and the cause of the progression of chronic kidney disease (CKD) into end-stage renal disease (ESRD). Nuclear factor erythroid 2 related factor 2 (Nrf2) is a significant regulator of redox balance that has been shown to improve kidney disease by eliminating ROS. To date, researchers have found that the use of Nrf2-activated compounds can effectively reduce ROS, thereby preventing or retarding the progression of various types of AKI. In this review, we summarized the molecular mechanisms of Nrf2 and ROS in AKI and described the latest findings on the therapeutic potential of Nrf2 activators in various types of AKI.
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Affiliation(s)
- Wei Wei
- Department of Urology, The First Hospital, Jilin University, Changchun, China
| | - Ning Ma
- Department of Urology, The First Hospital, Jilin University, Changchun, China
| | - Xiaoye Fan
- Institute of Translational Medicine, The First Hospital of Jilin University, Changchun, China
| | - Qinlei Yu
- Jilin Provincial Animal Disease Control Center, 4510 Xi'an Road, Changchun, 130062, China
| | - Xinxin Ci
- Institute of Translational Medicine, The First Hospital of Jilin University, Changchun, China.
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Shirinzadeh H, Neuhaus E, Ince Erguc E, Tascioglu Aliyev A, Gurer-Orhan H, Suzen S. New indole-7-aldehyde derivatives as melatonin analogues; synthesis and screening their antioxidant and anticancer potential. Bioorg Chem 2020; 104:104219. [PMID: 32916391 DOI: 10.1016/j.bioorg.2020.104219] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Revised: 08/06/2020] [Accepted: 08/20/2020] [Indexed: 12/30/2022]
Abstract
Over the last decade, there has been substantial interest in the use of melatonin (MLT) and MLT-like compounds in the treatment of several diseases. MLT can scavenge different reactive oxygen species and can also stimulate the synthesis of antioxidant enzymes. Our ongoing study relies on changing the groups in the different modifiable sites of the indole ring to increase the antioxidant activity. In this study a new approach for substitution of indole ring as indole based MLT analogue was proposed. We report the synthesis and characterization of a series of new indole-7-aldehyde hydrazide/hydrazone derivatives as indole-based MLT analogues. Anticancer potential of the compounds were evaluated both by their antioxidant and CYP1 inhibitory activities. In vitro antioxidant capacity of the compounds was investigated both in a cell-based (DCFH assay) and a cell-free (DPPH assay) assay. Potential inhibitory effects of the compounds on CYP1 catalytic activity were investigated via EROD assay. Cytotoxic activity of the compounds was further evaluated by the MTT assay in CHO-K1 cells. MLT analogues having an o-halogenated aromatic moiety exhibited effective antioxidant properties without having any cytotoxic effect. In conclusion, MLT derivatives represent promising scaffolds for discovery of effective antioxidant agents.
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Affiliation(s)
- Hanif Shirinzadeh
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Erzincan Binali YildirimUniversity, Yanlızbag Yerleskesi, 24100 Erzincan, Turkey.
| | - Eddy Neuhaus
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, Tandogan-06100, Ankara, Turkey
| | - Elif Ince Erguc
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ege University, 35040 Izmir, Turkey; Department of Pharmaceutical Toxicology, Faculty of Pharmacy, İzmir Katip Celebi University, 35620 Izmir, Turkey
| | - Alev Tascioglu Aliyev
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ege University, 35040 Izmir, Turkey
| | - Hande Gurer-Orhan
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ege University, 35040 Izmir, Turkey
| | - Sibel Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, Tandogan-06100, Ankara, Turkey
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Castañeda-Arriaga R, Pérez-González A, Reina M, Galano A. Computer-designed melatonin derivatives: potent peroxyl radical scavengers with no pro-oxidant behavior. Theor Chem Acc 2020. [DOI: 10.1007/s00214-020-02641-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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12
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Taha M, Aldhamin EAJ, Almandil NB, Anouar EH, Uddin N, Alomari M, Rahim F, Adalat B, Ibrahim M, Nawaz F, Iqbal N, Alghanem B, Altolayyan A, Khan KM. Synthesis of indole based acetohydrazide analogs: Their in vitro and in silico thymidine phosphorylase studies. Bioorg Chem 2020; 98:103745. [DOI: 10.1016/j.bioorg.2020.103745] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2020] [Revised: 03/05/2020] [Accepted: 03/09/2020] [Indexed: 12/17/2022]
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Indole derivatives as multifunctional drugs: Synthesis and evaluation of antioxidant, photoprotective and antiproliferative activity of indole hydrazones. Bioorg Chem 2019; 85:568-576. [PMID: 30825715 DOI: 10.1016/j.bioorg.2019.02.007] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 01/28/2019] [Accepted: 02/03/2019] [Indexed: 01/09/2023]
Abstract
Two series of indole derivatives 4-17, 20-22 were easily prepared and assayed for their radical-scavenging ability. Arylidene-1H-indole-2-carbohydrazones showed different extent antioxidant activity in DPPH, FRAP and ORAC assays. Good antioxidant activity is related to the number and position of hydroxyl groups on the arylidene moiety as well as to the presence of methoxy or 4-(diethylamino) group. On the contrary low antioxidant activity is showed by the isomeric 1H-indol-2-yl(methylene)-benzohydrazides. Furthermore, hydrazones 4-17 showed photoprotective capacities with satisfactory in vitro SPF as compared to the commercial PBSA sunscreen filter. The indole 16 and 17, showing the best antioxidant and photoprotective profile, were included in different formulation and their topical release was evaluated. Varying the formulation composition, it was possible to optimize skin adsorption and solubility of the active indole in the formulation. The antiproliferative effect of the hydrazones 4-17 was tested on human erythroleukemia K562 and melanoma Colo-38 cells. Hydrazones 11, 16 and 17 showed growth inhibition at sub micromolar concentrations on both cell lines. These results indicate indole hydrazones as potential multifunctional molecules especially in the treatment of neoplastic diseases being the good antioxidant properties of 16 and 17 correlated to their high antiproliferative activity.
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Melatonin attenuates acute kidney ischemia/reperfusion injury in diabetic rats by activation of the SIRT1/Nrf2/HO-1 signaling pathway. Biosci Rep 2019; 39:BSR20181614. [PMID: 30578379 PMCID: PMC6331666 DOI: 10.1042/bsr20181614] [Citation(s) in RCA: 93] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Revised: 12/17/2018] [Accepted: 12/20/2018] [Indexed: 12/29/2022] Open
Abstract
Background and aims: Diabetic kidney is more sensitive to ischemia/reperfusion (I/R) injury, which is associated with increased oxidative stress and impaired nuclear factor erythroid 2-related factor 2 (Nrf2)/heme oxygenase-1 (HO-1) signaling. Melatonin, a hormone that is secreted with the rhythm of the light/dark cycle, has antioxidative effects in reducing acute kidney injury (AKI). However, the molecular mechanism of melatonin protection against kidney I/R injury in the state of diabetes is still unknown. In the present study, we hypothesized that melatonin attenuates renal I/R injury in diabetes by activating silent information regulator 2 associated protein 1 (SIRT1) expression and Nrf2/HO-1 signaling. Methods: Control or streptozotocin (STZ)-induced Type 1 diabetic rats were treated with or without melatonin for 4 weeks. Renal I/R injury was achieved by clamping both left and right renal pedicles for 30 min followed by reperfusion for 48 h. Results: Diabetic rats that were treated with melatonin undergoing I/R injury prevented renal injury from I/R, in aspects of the histopathological score, cell apoptosis, and oxidative stress in kidney, accompanied with decreased expressions of SIRT1, Nrf2, and HO-1 as compared with those in control rats. All these alterations were attenuated or prevented by melatonin treatment; but these beneficial effects of melatonin were abolished by selective inhibition of SIRT1 with EX527. Conclusion: These findings suggest melatonin could attenuate renal I/R injury in diabetes, possibly through improving SIRT1/Nrf2/HO-1 signaling.
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Sherer C, Prabhu S, Adams D, Hayes J, Rowther F, Tolaymat I, Warr T, Snape TJ. Towards identifying potent new hits for glioblastoma. MEDCHEMCOMM 2018; 9:1850-1861. [PMID: 30568753 PMCID: PMC6253844 DOI: 10.1039/c8md00436f] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/31/2018] [Accepted: 10/01/2018] [Indexed: 11/21/2022]
Abstract
Glioblastoma is a devastating disease of the brain and is the most common malignant primary brain tumour in adults. The prognosis for patients is very poor with median time of survival after diagnosis measured in months, due in part to the tumours being highly aggressive and often resistant to chemotherapies. Alongside the ongoing research to identify key factors involved in tumour progression in glioblastoma, medicinal chemistry approaches must also be used in order to rapidly establish new and better treatments for brain tumour patients. Using a computational similarity search of the ZINC database, alongside traditional analogue design by medicinal chemistry intuition to improve the breadth of chemical space under consideration, six new hit compounds (14, 16, 18, 19, 20 and 22) were identified possessing low micromolar activity against both established cell lines (U87MG and U251MG) and patient-derived cell cultures (IN1472, IN1528 and IN1760). Each of these scaffolds provides a new platform for future development of a new therapy in this area, with particular promise shown against glioblastoma subtypes that are resistant to conventional chemotherapeutic agents.
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Affiliation(s)
- Chris Sherer
- School of Pharmacy and Biomedical Sciences , University of Central Lancashire , Preston , Lancashire PR1 2HE , UK .
| | - Saurabh Prabhu
- School of Pharmacy , University of East Anglia , Norwich Research Park , Norwich NR4 7TJ , UK
| | - David Adams
- School of Pharmacy and Biomedical Sciences , University of Central Lancashire , Preston , Lancashire PR1 2HE , UK .
| | - Joseph Hayes
- School of Physical Sciences and Computing , University of Central Lancashire , Preston , Lancashire PR1 2HE , UK
| | - Farzana Rowther
- Brain Tumour Research Centre , University of Wolverhampton , Wulfruna Street , Wolverhampton , WV1 1LY , UK
| | - Ibrahim Tolaymat
- Faculty of Medical Science , Anglia Ruskin University , Bishop Hall Lane , Chelmsford , Essex CM1 1SQ , UK
| | - Tracy Warr
- Brain Tumour Research Centre , University of Wolverhampton , Wulfruna Street , Wolverhampton , WV1 1LY , UK
| | - Timothy J Snape
- School of Pharmacy and Biomedical Sciences , University of Central Lancashire , Preston , Lancashire PR1 2HE , UK .
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Isolation and identification of two alkaloid structures with radical scavenging activity from Actinokineospora sp. UTMC 968, a new promising source of alkaloid compounds. Mol Biol Rep 2018; 45:2325-2332. [PMID: 30242664 DOI: 10.1007/s11033-018-4395-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2018] [Accepted: 09/18/2018] [Indexed: 10/28/2022]
Abstract
For decades, natural products from Actinomycetes have been recognized as one of the inestimable sources of therapeutic compounds. Presently, due to some challenges in the identification of novel compounds including the validation of novel natural products and their compatibility with the high throughput screening bioassays, evaluating new activity from known commercial ones would be an important designation. On the other hand, finding new sources of bioactive compounds from Actinomycetes can be promising in attaining pharmaceutical compounds with fewer purification steps and cost-effective production of the bioproducts. Here we describe the isolation and identification of two alkaloid compounds from a soil actinobacterium Actinokineospora sp. UTMC 968 including N-acetyltyramine (1) and N-acetyltryptamine (2) with revealing a new bioactivity for these molecules. The producer is a rare actinobacterium belonging to family Pseudonocardiaceae as the first alkaloid compounds producer genus in its family. The structures of alkaloid 1 and 2 were assigned on the basis of 1D and 2D NMR spectroscopy and MS analyses. Compound 1 and 2 are used commercially for their pharmaceutical activity but their radical scavenging activity has not previously been reported. The results of 1,1-diphenyl-2-picrylhydrazyl radical scavenging assay represented a remarkable DPPH radical scavenging capability with an IC50 value of 64.7 ± 0.5 and 131.3 ± 1.8 µg/mL for compound 1 and 2, respectively.
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Rathod AS, Godipurge SS, Biradar JS. Microwave Assisted, Solvent-Free, “Green” Synthesis of Novel Indole Analogs as Potent Antitubercular and Antimicrobial Agents and Their Molecular Docking Studies. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363218060324] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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18
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Melatonin: A Versatile Protector against Oxidative DNA Damage. Molecules 2018; 23:molecules23030530. [PMID: 29495460 PMCID: PMC6017920 DOI: 10.3390/molecules23030530] [Citation(s) in RCA: 165] [Impact Index Per Article: 27.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Revised: 02/13/2018] [Accepted: 02/22/2018] [Indexed: 12/15/2022] Open
Abstract
Oxidative damage to DNA has important implications for human health and has been identified as a key factor in the onset and development of numerous diseases. Thus, it is evident that preventing DNA from oxidative damage is crucial for humans and for any living organism. Melatonin is an astonishingly versatile molecule in this context. It can offer both direct and indirect protection against a wide variety of damaging agents and through multiple pathways, which may (or may not) take place simultaneously. They include direct antioxidative protection, which is mediated by melatonin's free radical scavenging activity, and also indirect ways of action. The latter include, at least: (i) inhibition of metal-induced DNA damage; (ii) protection against non-radical triggers of oxidative DNA damage; (iii) continuous protection after being metabolized; (iv) activation of antioxidative enzymes; (v) inhibition of pro-oxidative enzymes; and (vi) boosting of the DNA repair machinery. The rather unique capability of melatonin to exhibit multiple neutralizing actions against diverse threatening factors, together with its low toxicity and its ability to cross biological barriers, are all significant to its efficiency for preventing oxidative damage to DNA.
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ElBordiny HS, El-Miligy MM, Kassab SE, Daabees H, Mohamed Ali WA, Abdelhamid Mohamed El-Hawash S. Design, synthesis, biological evaluation and docking studies of new 3-(4,5-dihydro-1H-pyrazol/isoxazol-5-yl)-2-phenyl-1H-indole derivatives as potent antioxidants and 15-lipoxygenase inhibitors. Eur J Med Chem 2018; 145:594-605. [PMID: 29339254 DOI: 10.1016/j.ejmech.2018.01.026] [Citation(s) in RCA: 37] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2017] [Revised: 12/22/2017] [Accepted: 01/08/2018] [Indexed: 12/28/2022]
Abstract
New candidates of 3-(4,5-dihydro-1H-pyrazol/isoxazol-5-yl)-2-phenyl-1H-indole derivatives (4-7) were designed combining the pyrazoline/isoxazoline heterocycles and 2-phenylindole to explore its potential as 15-lipoxygenase (15-LOX) inhibitors. The design of the new derivatives was based on utilizing the antioxidant properties of pyrazoline, 2-phenylindole and the good 15-LOX inhibition properties of indolylpyrazoline. The derivatives were synthesized adopting simple and laboratory friendly reaction conditions to give the target compounds in quantitative yields. The resulting indolylpyrazolines/isoxazolines were evaluated as antioxidants against 2,2-diphenyl-1-picrylhydrazyl (DPPH), nitric oxide (NO) and superoxide dismutase (SOD); indolylpyrazoline (4b) was the most potent antioxidant against SOD assay (IC50 = 1.78 μM) to be superior to ascorbic by 2 folds. Consistently, (4b) was the most potent inhibitor when tested against Soybean 15-LOX (IC50 = 3.84 μM) excelling quercetin as standard inhibitor by 1.8 folds. Some of the new derivatives were docked into the active binding site of human 15-LOX (PDB entry 4NRE) emphasizing the most potent derivative (4b) and the least potent one (4c). Docking solutions of compounds (4b), (4c), (5b) and (6c) revealed that (4b) was the only compound that got stabilized into the catalytic pocket of enzyme by π-cation interaction with the catalytic Fe+ and formation of one hydrogen bond with Ile 676 amino acid. Other derivatives including the least potent one variably got stabilized into the active binding pocket by π-cation interaction with the catalytic Fe+ but failed to form hydrogen bond with Ile 676. For the future optimization of the generated inhibitors, (i) antioxidant activity against SOD, (ii) the inhibitor stabilization by π-cation interaction with the catalytic Fe+3 and (iii) formation of hydrogen bond with Ile 676 should be regarded.
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Affiliation(s)
- Haydi Saher ElBordiny
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Damanhour University, Damanhour, El-Buhaira, 22516, Egypt
| | - Mostafa Mahmoud El-Miligy
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Alexandria University, Alexandria, 21526, Egypt
| | - Shaymaa Emam Kassab
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Damanhour University, Damanhour, El-Buhaira, 22516, Egypt.
| | - Hoda Daabees
- Pharmaceutical Chemistry Department, Faculty of Pharmacy, Damanhour University, Damanhour, El-Buhaira, 22516, Egypt
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20
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Modification of Bischler-Möhlau indole derivatives through palladium catalyzed Suzuki reaction as effective cholinesterase inhibitors, their kinetic and molecular docking studies. Bioorg Chem 2018; 76:166-176. [DOI: 10.1016/j.bioorg.2017.11.003] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2017] [Revised: 11/08/2017] [Accepted: 11/10/2017] [Indexed: 12/30/2022]
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21
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Roaiah HM, Ghannam IAY, Ali IH, El Kerdawy AM, Ali MM, Abbas SES, El-Nakkady SS. Design, synthesis, and molecular docking of novel indole scaffold-based VEGFR-2 inhibitors as targeted anticancer agents. Arch Pharm (Weinheim) 2018; 351. [DOI: 10.1002/ardp.201700299] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2017] [Revised: 12/03/2017] [Accepted: 12/13/2017] [Indexed: 02/04/2023]
Affiliation(s)
- Hanaa M. Roaiah
- National Research Centre, Pharmaceutical and Drug Industries Research Division; Chemistry of Natural and Microbial Products Department; Cairo Egypt
| | - Iman A. Y. Ghannam
- National Research Centre, Pharmaceutical and Drug Industries Research Division; Chemistry of Natural and Microbial Products Department; Cairo Egypt
| | - Islam H. Ali
- National Research Centre, Pharmaceutical and Drug Industries Research Division; Chemistry of Natural and Microbial Products Department; Cairo Egypt
| | - Ahmed M. El Kerdawy
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Cairo University; Cairo Egypt
- Molecular Modeling Unit, Faculty of Pharmacy; Cairo University; Cairo Egypt
| | - Mamdouh M. Ali
- National Research Centre, Genetic Engineering and Biotechnology Division; Department of Biochemistry; Cairo Egypt
| | - Safinaz E-S. Abbas
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry; Cairo University; Cairo Egypt
| | - Sally S. El-Nakkady
- National Research Centre, Pharmaceutical and Drug Industries Research Division; Chemistry of Natural and Microbial Products Department; Cairo Egypt
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22
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Pietzsch J, Laube M, Bechmann N, Pietzsch FJ, Kniess T. Protective effects of 2,3-diaryl-substituted indole-based cyclooxygenase-2 inhibitors on oxidative modification of human low density lipoproteins in vitro. Clin Hemorheol Microcirc 2017; 61:615-32. [PMID: 25547413 DOI: 10.3233/ch-141923] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
It has been suggested that 2,3-diaryl-substituted indole-based cyclooxygenase-2 (COX-2) inhibitors (2,3-diaryl-indole coxibs) do not only appear as potent anti-inflammatory agents but also show the ability to scavenge reactive oxygen species (ROS). This led to the hypothesis that 2,3-diaryl-indole coxibs also may act as potent inhibitors of oxidative modification of low-density lipoprotein (LDL), which is considered a key factor in atherogenesis. The aim of this study was to explore i) the reactivity of a series of new synthesized 2,3-diaryl-indoles with several well characterized LDL oxidation systems and ii) subsequent effects on an inflammatory/atherogenic microenvironment. The results demonstrate that under the present experimental conditions 2,3-diaryl-indoles showed potent ROS scavenging activity and were able to markedly inhibit LDL oxidation. Subsequently, this led to a substantial decrease of modified LDL uptake by scavenger receptors in THP-1 macrophages in vitro and in rats in vivo. Moreover, modified LDL-mediated monocyte/neutrophil adhesion to endothelial cells, macrophage NFκB activation, as well as macrophage and endothelial cell cytokine release was diminished in vitro. The reduction of modified LDL-induced atherogenic effects by antioxidant 2,3-diaryl-indole coxibs may widen the therapeutic window of COX-2 targeted treatment.
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Affiliation(s)
- Jens Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany.,Technische Universität Dresden, Department of Chemistry and Food Chemistry, Dresden, Germany
| | - Markus Laube
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany.,Technische Universität Dresden, Department of Chemistry and Food Chemistry, Dresden, Germany
| | - Nicole Bechmann
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany.,Technische Universität Dresden, Department of Chemistry and Food Chemistry, Dresden, Germany
| | - Franz-Jacob Pietzsch
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany.,Technische Universität Dresden, Medical Faculty and University Hospital, Centre for Translational Bone, Joint, and Soft Tissue Research, Dresden, Germany
| | - Torsten Kniess
- Helmholtz-Zentrum Dresden-Rossendorf, Institute of Radiopharmaceutical Cancer Research, Department Radiopharmaceutical and Chemical Biology, Dresden, Germany
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23
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Galano A. A first principles investigation on the electron donor ability of synthetic melatonin derivatives: implications for their antioxidant activity. Theor Chem Acc 2016. [DOI: 10.1007/s00214-016-1917-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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24
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Laube M, Kniess T, Pietzsch J. Development of Antioxidant COX-2 Inhibitors as Radioprotective Agents for Radiation Therapy-A Hypothesis-Driven Review. Antioxidants (Basel) 2016; 5:antiox5020014. [PMID: 27104573 PMCID: PMC4931535 DOI: 10.3390/antiox5020014] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Revised: 04/08/2016] [Accepted: 04/11/2016] [Indexed: 12/12/2022] Open
Abstract
Radiation therapy (RT) evolved to be a primary treatment modality for cancer patients. Unfortunately, the cure or relief of symptoms is still accompanied by radiation-induced side effects with severe acute and late pathophysiological consequences. Inhibitors of cyclooxygenase-2 (COX-2) are potentially useful in this regard because radioprotection of normal tissue and/or radiosensitizing effects on tumor tissue have been described for several compounds of this structurally diverse class. This review aims to substantiate the hypothesis that antioxidant COX-2 inhibitors are promising radioprotectants because of intercepting radiation-induced oxidative stress and inflammation in normal tissue, especially the vascular system. For this, literature reporting on COX inhibitors exerting radioprotective and/or radiosensitizing action as well as on antioxidant COX inhibitors will be reviewed comprehensively with the aim to find cross-points of both and, by that, stimulate further research in the field of radioprotective agents.
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Affiliation(s)
- Markus Laube
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden D-01328, Germany.
| | - Torsten Kniess
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden D-01328, Germany.
| | - Jens Pietzsch
- Department of Radiopharmaceutical and Chemical Biology, Institute of Radiopharmaceutical Cancer Research, Helmholtz-Zentrum Dresden-Rossendorf, Bautzner Landstrasse 400, Dresden D-01328, Germany.
- Department of Chemistry and Food Chemistry, Technische Universität Dresden, Dresden D-01062, Germany.
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25
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Novel indole-based melatonin analogues: Evaluation of antioxidant activity and protective effect against amyloid β-induced damage. Bioorg Med Chem 2016; 24:1658-64. [DOI: 10.1016/j.bmc.2016.02.039] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2016] [Revised: 02/24/2016] [Accepted: 02/27/2016] [Indexed: 01/01/2023]
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26
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Galano A. Computational-aided design of melatonin analogues with outstanding multifunctional antioxidant capacity. RSC Adv 2016. [DOI: 10.1039/c6ra00549g] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
The IIcD melatonin-analogue was identified as the most promising multifunctional antioxidant from a set of 19, and better for that purpose than the parent molecule and Trolox.
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Affiliation(s)
- Annia Galano
- Departamento de Química
- Universidad Autónoma Metropolitana-Iztapalapa
- México D. F
- Mexico
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27
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Yu L, Liang H, Dong X, Zhao G, Jin Z, Zhai M, Yang Y, Chen W, Liu J, Yi W, Yang J, Yi D, Duan W, Yu S. Reduced silent information regulator 1 signaling exacerbates myocardial ischemia-reperfusion injury in type 2 diabetic rats and the protective effect of melatonin. J Pineal Res 2015; 59:376-90. [PMID: 26327197 DOI: 10.1111/jpi.12269] [Citation(s) in RCA: 88] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/05/2015] [Accepted: 08/14/2015] [Indexed: 01/06/2023]
Abstract
Diabetes mellitus (DM) increases myocardial oxidative stress and endoplasmic reticulum (ER) stress. Melatonin confers cardioprotective effect by suppressing oxidative damage. However, the effect and mechanism of melatonin on myocardial ischemia-reperfusion (MI/R) injury in type 2 diabetic state are still unknown. In this study, we developed high-fat diet-fed streptozotocin (HFD-STZ) rat, a well-known type 2 diabetic model, to evaluate the effect of melatonin on MI/R injury with a focus on silent information regulator 1 (SIRT1) signaling, oxidative stress, and PERK/eIF2α/ATF4-mediated ER stress. HFD-STZ treated rats were exposed to melatonin treatment in the presence or the absence of sirtinol (a SIRT1 inhibitor) and subjected to MI/R surgery. Compared with nondiabetic animals, type 2 diabetic rats exhibited significantly decreased myocardial SIRT1 signaling, increased apoptosis, enhanced oxidative stress, and ER stress. Additionally, further reduced SIRT1 signaling, aggravated oxidative damage, and ER stress were found in diabetic animals subjected to MI/R surgery. Melatonin markedly reduced MI/R injury by improving cardiac functional recovery and decreasing myocardial apoptosis in type 2 diabetic animals. Melatonin treatment up-regulated SIRT1 expression, reduced oxidative damage, and suppressed PERK/eIF2α/ATF4 signaling. However, these effects were all attenuated by SIRT1 inhibition. Melatonin also protected high glucose/high fat cultured H9C2 cardiomyocytes against simulated ischemia-reperfusion injury-induced ER stress by activating SIRT1 signaling while SIRT1 siRNA blunted this action. Taken together, our study demonstrates that reduced cardiac SIRT1 signaling in type 2 diabetic state aggravates MI/R injury. Melatonin ameliorates reperfusion-induced oxidative stress and ER stress via activation of SIRT1 signaling, thus reducing MI/R damage and improving cardiac function.
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Affiliation(s)
- Liming Yu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Hongliang Liang
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Xiaochao Dong
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Guolong Zhao
- Department of Cardiovascular Surgery, General Hospital, Ningxia Medical University, Yinchuan, China
| | - Zhenxiao Jin
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Mengen Zhai
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Yang Yang
- Department of Biomedical Engineering, The Fourth Military Medical University, Xi'an, China
| | - Wensheng Chen
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Jincheng Liu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Wei Yi
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Jian Yang
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Dinghua Yi
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Weixun Duan
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
| | - Shiqiang Yu
- Department of Cardiovascular Surgery, Xijing Hospital, The Fourth Military Medical University, Xi'an, China
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28
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Synthesis, characterization, antimicrobial, DNA-cleavage and antioxidant activities of 3-((5-chloro-2-phenyl-1 H -indol-3-ylimino)methyl)quinoline-2(1 H )-thione and its metal complexes. J Mol Struct 2015. [DOI: 10.1016/j.molstruc.2014.08.033] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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29
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Gitto R, De Luca L, Ferro S, Russo E, De Sarro G, Chisari M, Ciranna L, Alvarez-Builla J, Alajarin R, Buemi MR, Chimirri A. Synthesis, modelling and biological characterization of 3-substituted-1H-indoles as ligands of GluN2B-containing N-methyl-d-aspartate receptors. Bioorg Med Chem 2014; 22:1040-8. [DOI: 10.1016/j.bmc.2013.12.040] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Revised: 12/10/2013] [Accepted: 12/17/2013] [Indexed: 11/28/2022]
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30
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Laube M, Tondera C, Sharma SK, Bechmann N, Pietzsch FJ, Pigorsch A, Köckerling M, Wuest F, Pietzsch J, Kniess T. 2,3-Diaryl-substituted indole based COX-2 inhibitors as leads for imaging tracer development. RSC Adv 2014. [DOI: 10.1039/c4ra05650g] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A series of 2,3-diaryl-substituted indoles containing a fluorine or methoxy group was synthesized via Fischer indole synthesis, McMurry cyclization, or Bischler–Möhlau reaction to identify potential leads for PET radiotracer development.
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Affiliation(s)
- Markus Laube
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Christoph Tondera
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Sai Kiran Sharma
- Department of Oncology
- Cross Cancer Institute
- University of Alberta
- Edmonton, Canada T6G 1Z2
| | - Nicole Bechmann
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Franz-Jacob Pietzsch
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Centre for Translational Bone, Joint, and Soft Tissue Research
| | - Arne Pigorsch
- Department of Inorganic Solid State Chemistry
- Institute of Chemistry
- University of Rostock
- 18059 Rostock, Germany
| | - Martin Köckerling
- Department of Inorganic Solid State Chemistry
- Institute of Chemistry
- University of Rostock
- 18059 Rostock, Germany
| | - Frank Wuest
- Department of Oncology
- Cross Cancer Institute
- University of Alberta
- Edmonton, Canada T6G 1Z2
| | - Jens Pietzsch
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
- Department of Chemistry and Food Chemistry
| | - Torsten Kniess
- Department Radiopharmaceutical and Chemical Biology
- Institute of Radiopharmaceutical Cancer Research
- Helmholtz-Zentrum Dresden-Rossendorf
- 01328 Dresden, Germany
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31
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Buemi MR, De Luca L, Chimirri A, Ferro S, Gitto R, Alvarez-Builla J, Alajarin R. Indole derivatives as dual-effective agents for the treatment of neurodegenerative diseases: Synthesis, biological evaluation, and molecular modeling studies. Bioorg Med Chem 2013; 21:4575-80. [DOI: 10.1016/j.bmc.2013.05.044] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2013] [Revised: 05/13/2013] [Accepted: 05/17/2013] [Indexed: 01/31/2023]
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32
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Karaaslan C, Kadri H, Coban T, Suzen S, Westwell AD. Synthesis and antioxidant properties of substituted 2-phenyl-1H-indoles. Bioorg Med Chem Lett 2013; 23:2671-4. [PMID: 23540647 DOI: 10.1016/j.bmcl.2013.02.090] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2012] [Revised: 02/16/2013] [Accepted: 02/20/2013] [Indexed: 11/26/2022]
Abstract
In this study, we report the design, synthesis and antioxidant activity of a series of substituted 2-(4-aminophenyl)-1H-indoles and 2-(methoxyphenyl)-1H-indoles. The new compounds are structurally related to the known indole-based antioxidant lead compound melatonin (MLT), and the antitumour 2-(4-aminophenyl)benzothiazole and 2-(3,4-dimethoxyphenyl)benzothiazole series. Efficient access to the target 2-phenylindoles was achieved via Fischer indole synthesis between substituted phenylhydrazines and acetophenones. 2-(4-Aminophenyl)indoles (such as the 6-fluoro analogue 3b) in particular showed potent antioxidant activity in the DPPH and superoxide radical scavenging assays (80% and 81% inhibition at 1mM concentration of 3b, respectively), at a level comparable with the reference standard MLT (98% and 75% at 1 mM).
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Affiliation(s)
- Cigdem Karaaslan
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Ankara University, 06100 Tandogan, Ankara, Turkey
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33
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Synthesis, Antioxidant, Antimicrobial, Antimycobacterial, and Cytotoxic Activities of Azetidinone and Thiazolidinone Moieties Linked to Indole Nucleus. J CHEM-NY 2013. [DOI: 10.1155/2013/543815] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
2-N-(2-Phenyl-1H-indol-3-yl)imino-4-arylthiazoles (3a–c) were used as key synthons for the preparation of (4-arylthiazol-2-yl)-4-(2-phenyl-1H-indol-3-yl)azetidin-2-ones (4a–c) and 3-(4-arylthiazol-2-yl)-2-(2-phenyl-1H-indol-3-yl)thiazolidin-4-ones (5a–c). These newly synthesized compounds have been characterized with the help of IR,1H NMR,13C NMR, and mass spectral studies. All compounds were screened for their antioxidant, antimicrobial, antimycobacterial, and cytotoxic activities. Some of the compounds displayed excellent activity.
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35
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Suzen S, Tekiner-Gulbas B, Shirinzadeh H, Uslu D, Gurer-Orhan H, Gumustas M, Ozkan SA. Antioxidant activity of indole-based melatonin analogues in erythrocytes and their voltammetric characterization. J Enzyme Inhib Med Chem 2012; 28:1143-55. [PMID: 22994658 DOI: 10.3109/14756366.2012.717223] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Melatonin (MLT) is a strong free-radical scavenger, which protects the body from the effects of oxidants. In recent years, MLT have been described resulting in much attention in the development of synthetic compounds possessing. As a part of our ongoing study a series of indole-based MLT analogue hydrazide/hydrazone derivatives were synthesized, characterized and in vitro antioxidant activity was investigated by evaluating their reducing effect against oxidation of a redox sensitive fluorescent probe. Membrane stabilizing effect of all compounds was also investigated by lactate dehydrogenase leakage assay. Furthermore voltammetric methods have been applied to the synthesized compounds to characterize oxidation potentials to get insight into their metabolism owing to the oxidation mechanisms taking place at the electrode and in the body share similar principles.
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Affiliation(s)
- Sibel Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University , Tandogan, Ankara , Turkey
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36
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Suzen S, Cihaner SS, Coban T. Synthesis and comparison of antioxidant properties of indole-based melatonin analogue indole amino Acid derivatives. Chem Biol Drug Des 2011; 79:76-83. [PMID: 21883955 DOI: 10.1111/j.1747-0285.2011.01216.x] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Increased levels of reactive oxygen species attributed to oxidative stress have been found to be responsible for the development of some vital diseases such as cardiovascular, neurodegenerative and autoimmune diseases. Recently, it was observed that melatonin is a highly important antioxidant, and melatonin analogues are under investigation to find out improved antioxidant activity. In this study, 14 melatonin -based analogue indole amino acid and N-protected amino acid derivatives were synthesized and elucidated spectrometrically. To investigate the antioxidant activity of the synthesized compounds and to compare with melatonin, butylhydroxytoluene and vitamin E, lipid peroxidation inhibition and 2,2-diphenyl-1-picrylhydrazyl radical-scavenging activities were tested. The results indicated that the synthesized new indole amino acid derivatives have similar activities to melatonin in 2,2-diphenyl-1-picrylhydrazyl radical-scavenging activity assay but more potent activities in lipid peroxidation inhibition assay.
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Affiliation(s)
- Sibel Suzen
- Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Ankara University, 06100 Tandogan, Ankara, Turkey.
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Yılmaz AD, Coban T, Suzen S. Synthesis and antioxidant activity evaluations of melatonin-based analogue indole-hydrazide/hydrazone derivatives. J Enzyme Inhib Med Chem 2011; 27:428-36. [DOI: 10.3109/14756366.2011.594048] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ayse Didem Yılmaz
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University
06100 Tandogan, Ankara Turkey
| | - Tulay Coban
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ankara University
06100 Tandogan, Ankara Turkey
| | - Sibel Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University
06100 Tandogan, Ankara Turkey
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38
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Mohareb RM, Ahmed HH, Elmegeed GA, Abd-Elhalim MM, Shafic RW. Development of new indole-derived neuroprotective agents. Bioorg Med Chem 2011; 19:2966-74. [DOI: 10.1016/j.bmc.2011.03.031] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/28/2010] [Revised: 03/06/2011] [Accepted: 03/14/2011] [Indexed: 11/17/2022]
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39
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Estevão MS, Carvalho LC, Ferreira LM, Fernandes E, Marques MMB. Analysis of the antioxidant activity of an indole library: cyclic voltammetry versus ROS scavenging activity. Tetrahedron Lett 2011. [DOI: 10.1016/j.tetlet.2010.10.172] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
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40
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Ahmed HH, Elmegeed GA, El-Sayed ESM, Abd-Elhalim MM, Shousha WG, Shafic RW. Potent neuroprotective role of novel melatonin derivatives for management of central neuropathy induced by acrylamide in rats. Eur J Med Chem 2010; 45:5452-9. [DOI: 10.1016/j.ejmech.2010.09.017] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 08/14/2010] [Accepted: 09/08/2010] [Indexed: 10/19/2022]
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41
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Estevão MS, Carvalho LC, Ribeiro D, Couto D, Freitas M, Gomes A, Ferreira LM, Fernandes E, Marques MMB. Antioxidant activity of unexplored indole derivatives: synthesis and screening. Eur J Med Chem 2010; 45:4869-78. [PMID: 20727623 DOI: 10.1016/j.ejmech.2010.07.059] [Citation(s) in RCA: 85] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2010] [Revised: 07/20/2010] [Accepted: 07/29/2010] [Indexed: 12/22/2022]
Abstract
The present study envisaged the development of novel antioxidant candidates using the indole scaffold. Several tryptophan and tryptamine derivatives were synthesized, in particular prenylated indole compounds, and their scavenging activity for reactive oxygen species (ROS) and reactive nitrogen species (RNS) was investigated. The library substitution pattern included several alkyl chains at positions N-1, C-2 of the indole nucleus, including prenyl and isopentyl chain, as well as different groups at the side chain (C-3) that allowed the investigation of a possible radical stabilization. The results obtained showed that tryptophan (8), tryptamine (9), N-phthaloyl tryptamine (5) and N-prenyl tryptophan (13) were the most active against peroxyl radical (ROO(•)) with activities higher than Trolox, which was used as control. The scavenging of hypochlorous acid (HOCl) was also evaluated and tryptophan (8) and tryptamine (9) showed IC(50) of 3.50 ± 0.4 and 6.00 ± 0.60 μM, respectively. Significant activity was also found for the N-prenyl tryptophan (13) with an IC(50) of 4.13 ± 0.17 μM and C-2 prenylated derivative (14), with 4.56 ± 0.48 μM. The studies were extended to RNS and best results were obtained against peroxynitrite anion (ONOO(-)) in the presence of NaHCO(3). N-alkylated tryptophan (18) showed a high activity with an IC(50) of 14.0 ± 6.8 μM. The results show that the tested compounds are effective scavengers of ROS and RNS, and suggest that the radical stabilization is strongly dependent on the type of substituents on the indolic moiety and on their relative positions. In addition, the radical dissipation inside the indolic system is mandatory for the observed antioxidant activity.
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Affiliation(s)
- Mónica S Estevão
- REQUIMTE-CQFB, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, Monte de Caparica, 2829-516 Caparica, Portugal
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42
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Shirinzadeh H, Eren B, Gurer-Orhan H, Suzen S, Özden S. Novel indole-based analogs of melatonin: synthesis and in vitro antioxidant activity studies. Molecules 2010; 15:2187-202. [PMID: 20428037 PMCID: PMC6257329 DOI: 10.3390/molecules15042187] [Citation(s) in RCA: 50] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2010] [Revised: 03/15/2010] [Accepted: 03/23/2010] [Indexed: 01/16/2023] Open
Abstract
The aim of this study was to synthesize and examine possible in vitro antioxidant effects of indole-based melatonin analogue compounds. As a part of our ongoing study nineteen indole hydrazide/hydrazone derivatives were synthesized, characterized and their in vitro antioxidant activity was investigated by three different assays: by evaluating their reducing effect against oxidation of a redox sensitive fluorescent probe, by examining their protective effect against H2O2-induced membrane lipid peroxidation and by determining their inhibitory effect on AAPH–induced hemolysis of human erythrocytes. The results indicated significant strong antioxidant activity for most of the compounds, when compared to melatonin.
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Affiliation(s)
- Hanif Shirinzadeh
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100 Tandogan, Ankara, Turkey
| | - Burcu Eren
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey
| | - Hande Gurer-Orhan
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ege University, 35100 Bornova, Izmir, Turkey
| | - Sibel Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100 Tandogan, Ankara, Turkey
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +90 312 2033074; Fax: +90 312 2131081
| | - Seçkin Özden
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100 Tandogan, Ankara, Turkey
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Antioxidant activity of benzoxazolinonic and benzothiazolinonic derivatives in the LDL oxidation model. Bioorg Med Chem 2009; 17:7823-30. [DOI: 10.1016/j.bmc.2009.09.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2009] [Accepted: 09/10/2009] [Indexed: 11/21/2022]
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44
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Ferreira PMT, Monteiro LS, Coban T, Suzen S. Comparative effect ofN-substituted dehydroamino acids and α-tocopherol on rat liver lipid peroxidation activities. J Enzyme Inhib Med Chem 2009; 24:967-71. [DOI: 10.1080/14756360802561162] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Affiliation(s)
| | - Luis S. Monteiro
- Department of Chemistry, University of Minho, 4710-057 Braga, Portugal
| | - T. Coban
- Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ankara University, 06100, Tandogan, Ankara, Turkey
| | - S. Suzen
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100, Tandogan, Ankara, Turkey
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45
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Gürkök G, Coban T, Suzen S. Melatonin analogue new indole hydrazide/hydrazone derivatives with antioxidant behavior: Synthesis and structure–activity relationships. J Enzyme Inhib Med Chem 2009; 24:506-15. [DOI: 10.1080/14756360802218516] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Affiliation(s)
- Gökce Gürkök
- 1Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100, Tandogan, Ankara, Turkey
| | - Tulay Coban
- 2Department of Pharmaceutical Toxicology, Faculty of Pharmacy, Ankara University, 06100, Tandogan, Ankara, Turkey
| | - Sibel Suzen
- 1Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Ankara University, 06100, Tandogan, Ankara, Turkey
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46
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Relationship between Aldose reductase and superoxide dismutase inhibition capacities of indole-based analogs of melatonin derivatives. ARCH BIOL SCI 2009. [DOI: 10.2298/abs0904675d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Aldose reductase (AR) has been implicated in the etiology of diabetic complications. Under diabetic conditions, the elevated vascular glucose level causes an increased flux through the polyol pathway, which induces functional and morphological changes associated with secondary diabetic complications such as cataract, neuropathy, and nephrop?athy. Oxidative stress, antioxidants, and the polyol pathway have recently been found to be linked in pathological states. A large number of structurally different compounds have been studied as potent in vitro AR inhibitors (ARIs). However, with few exceptions, these compounds did not show clinical benefit, and some even produced serious side effects. In view of the ARI activity of certain indole derivative compounds and antioxidant properties of melatonin, we investigated some indole-based analogs of melatonin derivatives. Antioxidant and ARI activity tests were applied to nine indole derivatives that are substituted at the third and fifth positions. Also, the relationship between ARI and antioxidant enzyme activity is discussed.
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Barschak AG, Sitta A, Deon M, Busanello ENB, Coelho DM, Cipriani F, Dutra-Filho CS, Giugliani R, Wajner M, Vargas CR. Amino acids levels and lipid peroxidation in maple syrup urine disease patients. Clin Biochem 2008; 42:462-6. [PMID: 19121297 DOI: 10.1016/j.clinbiochem.2008.12.005] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 11/26/2008] [Accepted: 12/03/2008] [Indexed: 11/28/2022]
Abstract
OBJECTIVE In the present study we correlated the amino acids, branched-chain alpha-keto acids and alpha-hydroxy acids levels with the thiobarbituric acid-reactive species (TBARS) measurement, a lipid peroxidation parameter, in plasma from treated MSUD patients in order to examine whether these accumulated metabolites could be associated to the oxidative stress present in MSUD. DESIGN AND METHODS TBARS, amino acids, branched-chain alpha-keto acids and alpha-hydroxy acids concentrations were measured in plasma samples from treated MSUD patients. RESULTS We verified that plasma TBARS was increased, whereas tryptophan and methionine concentrations were significantly reduced. Furthermore TBARS measurement was inversely correlated to methionine and tryptophan levels. CONCLUSIONS Considering that methionine and tryptophan have antioxidant activities, the data suggest that the imbalance of these amino acids may be involved with lipid peroxidation in MSUD.
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Affiliation(s)
- Alethéa G Barschak
- Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
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48
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Gülçin I. Measurement of antioxidant ability of melatonin and serotonin by the DMPD and CUPRAC methods as trolox equivalent. J Enzyme Inhib Med Chem 2008; 23:871-6. [DOI: 10.1080/14756360701626223] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Ilhami Gülçin
- .Department of Chemistry, Faculty of Science and Arts, Atatürk University, 25240, Erzurum, Turkey
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49
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Caliskan-Ergün B, Süküroğlu M, Coban T, Banoğlu E, Suzen S. Screening and evaluation of antioxidant activity of some pyridazine derivatives. J Enzyme Inhib Med Chem 2008; 23:225-9. [PMID: 18343908 DOI: 10.1080/14756360701475167] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
Abstract
Antioxidants are compounds that can delay, inhibit, or prevent the oxidation of materials that can be oxidized by scavenging free radicals and help in diminishing oxidative stress. They belong to different chemical classes. Recently there are studies related to pyridazinone derivatives for their antioxidant activities. Since there are evidences implicates reactive oxygen species and nitric oxide as mediators of inflammation and/or tissue damage in inflammatory and arthritic disorders it was though that compounds that have both antioxidant and anti-inflammatory activities would have been essential for the inflammatory diseases. Based on these findings a series of 2H-pyridazine-3-one and 6-chloropyridazine analogues that have anti-inflammatory activity was tested in vitro on superoxide formation and effects on lipid peroxidation were determined against alpha-tocopherol. Most of the compounds have strong inhibitory effect on superoxide anion (between 84% - 99%) at 10(- 3) M concentration. In addition, these compounds showed similar activity to alpha-tocopherol at 10(- 3) M concentrations.
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Affiliation(s)
- Burcu Caliskan-Ergün
- Department of Pharmaceutical Chemistry, Gazi University, Faculty of Pharmacy, Etiler, Ankara, Turkey
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50
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Tengattini S, Reiter RJ, Tan DX, Terron MP, Rodella LF, Rezzani R. Cardiovascular diseases: protective effects of melatonin. J Pineal Res 2008; 44:16-25. [PMID: 18078444 DOI: 10.1111/j.1600-079x.2007.00518.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
This brief review considers some of the cardiac diseases and conditions where free radicals and related reactants are believed to be causative. The report also describes the beneficial actions of melatonin against oxidative cardiovascular disorders. Based on the data available, melatonin seems to have cardioprotective properties via its direct free radical scavenger and its indirect antioxidant activity. Melatonin efficiently interacts with various reactive oxygen and reactive nitrogen species (receptor independent actions) and it also upregulates antioxidant enzymes and downregulates pro-oxidant enzymes (receptor-dependent actions). Moreover, melatonin enters all cells and subcellular compartments and crosses morphophysiologic barriers. These findings have implications for the protective effects of melatonin against cardiac diseases induced by oxidative stress. Melatonin attenuates molecular and cellular damages resulting from cardiac ischemia/reperfusion in which destructive free radicals are involved. Anti-inflammatory and antioxidative properties of melatonin are also involved in the protection against a chronic vascular disease, atherosclerosis. The administration of melatonin, as a result of its antioxidant features, has been reported to reduce hypertension and cardiotoxicity induced by clinically used drugs. The results described herein help to clarify the beneficial effects of melatonin against these conditions and define the potential clinical applicability of melatonin in cardiovascular diseases.
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Affiliation(s)
- Sandra Tengattini
- Department of Cellular and Structural Biology, University of Texas Health Science Center, San Antonio, TX, USA
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