1
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Barbarossa A, Carrieri A, Carocci A. Melatonin and Related Compounds as Antioxidants. Mini Rev Med Chem 2024; 24:546-565. [PMID: 37366352 DOI: 10.2174/1389557523666230627140816] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2023] [Revised: 05/06/2023] [Accepted: 05/30/2023] [Indexed: 06/28/2023]
Abstract
Oxidative stress has been reported to be involved in the onset and development of several diseases, including neurodegenerative and cardiovascular disorders, some types of cancer, and diabetes. Therefore, finding strategies to detoxify free radicals is an active area of research. One of these strategies is the use of natural or synthetic antioxidants. In this context, melatonin (MLT) has been proven to possess most of the required characteristics of an efficient antioxidant. In addition, its protection against oxidative stress continues after being metabolized, since its metabolites also exhibit antioxidant capacity. Based on the appealing properties of MLT and its metabolites, various synthetic analogues have been developed to obtain compounds with higher activity and lower side effects. This review addresses recent studies with MLT and related compounds as potential antioxidants.
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Affiliation(s)
- Alexia Barbarossa
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari "Aldo Moro", 70126. Bari, Italy
| | - Antonio Carrieri
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari "Aldo Moro", 70126. Bari, Italy
| | - Alessia Carocci
- Department of Pharmacy-Pharmaceutical Sciences, University of Bari "Aldo Moro", 70126. Bari, Italy
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2
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Zahoor AF, Saeed S, Rasul A, Noreen R, Irfan A, Ahmad S, Faisal S, Al-Hussain SA, Saeed MA, Muhammed MT, Muhammad ZA, Zaki MEA. Synthesis, Cytotoxic, and Computational Screening of Some Novel Indole-1,2,4-Triazole-Based S-Alkylated N-Aryl Acetamides. Biomedicines 2023; 11:3078. [PMID: 38002078 PMCID: PMC10669176 DOI: 10.3390/biomedicines11113078] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/01/2023] [Accepted: 11/02/2023] [Indexed: 11/26/2023] Open
Abstract
Molecular hybridization has emerged as the prime and most significant approach for the development of novel anticancer chemotherapeutic agents for combating cancer. In this pursuit, a novel series of indole-1,2,4-triazol-based N-phenyl acetamide structural motifs 8a-f were synthesized and screened against the in vitro hepatocellular cancer Hep-G2 cell line. The MTT assay was applied to determine the anti-proliferative potential of novel indole-triazole compounds 8a-f, which displayed cytotoxicity potential as cell viabilities at 100 µg/mL concentration, by using ellipticine and doxorubicin as standard reference drugs. The remarkable prominent bioactive structural hybrids 8a, 8c, and 8f demonstrated good-to-excellent anti-Hep-G2 cancer chemotherapeutic potential, with a cell viability of (11.72 ± 0.53), (18.92 ± 1.48), and (12.93 ± 0.55), respectively. The excellent cytotoxicity efficacy against the liver cancer cell line Hep-G2 was displayed by the 3,4-dichloro moiety containing indole-triazole scaffold 8b, which had the lowest cell viability (10.99 ± 0.59) compared with the standard drug ellipticine (cell viability = 11.5 ± 0.55) but displayed comparable potency in comparison with the standard drug doxorubicin (cell viability = 10.8 ± 0.41). The structure-activity relationship (SAR) of indole-triazoles 8a-f revealed that the 3,4-dichlorophenyl-based indole-triazole structural hybrid 8b displayed excellent anti-Hep-G2 cancer chemotherapeutic efficacy. The in silico approaches such as molecular docking scores, molecular dynamic simulation stability data, DFT, ADMET studies, and in vitro pharmacological profile clearly indicated that indole-triazole scaffold 8b could be the lead anti-Hep-G2 liver cancer therapeutic agent and a promising anti-Hep-G2 drug candidate for further clinical evaluations.
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Affiliation(s)
- Ameer Fawad Zahoor
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.F.Z.); (A.I.)
| | - Sadaf Saeed
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.F.Z.); (A.I.)
| | - Azhar Rasul
- Department of Zoology, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Razia Noreen
- Department of Biochemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan
| | - Ali Irfan
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.F.Z.); (A.I.)
| | - Sajjad Ahmad
- Department of Health and Biological Sciences, Abasyn University, Peshawar 25000, Pakistan
- Gilbert and Rose-Marie Chagoury School of Medicine, Lebanese American University, Beirut P.O. Box 36, Lebanon
- Department of Natural Sciences, Lebanese American University, Beirut P.O. Box 36, Lebanon
| | - Shah Faisal
- Department of Chemistry, Islamia College University Peshawar, Peshawar 25120, Pakistan
| | - Sami A. Al-Hussain
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
| | - Muhammad Athar Saeed
- Department of Chemistry, Government College University Faisalabad, Faisalabad 38000, Pakistan; (A.F.Z.); (A.I.)
| | - Muhammed Tilahun Muhammed
- Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Suleyman Demirel University, Isparta 32000, Türkiye
| | - Zeinab A. Muhammad
- Department of Pharmaceutical Chemistry, National Organization for Drug Control and Research (NODCAR), Giza 12311, Egypt
| | - Magdi E. A. Zaki
- Department of Chemistry, College of Science, Imam Mohammad Ibn Saud Islamic University (IMSIU), Riyadh 11623, Saudi Arabia
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Dutta K, Majumdar AG, Kushwah N, Wadawale AP, Patro BS, Ghosh SK. Synthesis of novel indole‐oxadiazole molecular hybrids by a regioselective C‐3 sulfenylation of indole with 1,3,4‐oxadiazole‐2‐thiols using iodine‐dimethyl sulfoxide and their anticancer properties. J Heterocycl Chem 2022. [DOI: 10.1002/jhet.4549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Kartik Dutta
- Bio‐organic Division, Bhabha Atomic Research Centre Trombay Mumbai India
- Homi Bhabha National Institute Anushaktinagar Mumbai India
| | - Ananda Guha Majumdar
- Bio‐organic Division, Bhabha Atomic Research Centre Trombay Mumbai India
- Homi Bhabha National Institute Anushaktinagar Mumbai India
| | - Nisha Kushwah
- Chemistry Division, Bhabha Atomic Research Centre Trombay Mumbai India
| | - Amey P. Wadawale
- Chemistry Division, Bhabha Atomic Research Centre Trombay Mumbai India
| | - Birija S. Patro
- Bio‐organic Division, Bhabha Atomic Research Centre Trombay Mumbai India
- Homi Bhabha National Institute Anushaktinagar Mumbai India
| | - Sunil K. Ghosh
- Bio‐organic Division, Bhabha Atomic Research Centre Trombay Mumbai India
- Homi Bhabha National Institute Anushaktinagar Mumbai India
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4
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Radwan MA, Al Rugaie O, Al Abdulmonem W, Alfaifi MY, Elbehairi SEI. Synthesis and cytotoxic activity of new indolylpyrrole derivatives. ARAB J CHEM 2021. [DOI: 10.1016/j.arabjc.2021.103209] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
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5
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Pachuta-Stec A. Antioxidant Activity of 1,2,4-Triazole and Its Derivatives: A Mini Review. Mini Rev Med Chem 2021; 22:1081-1094. [PMID: 33797373 DOI: 10.2174/1389557521666210401091802] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2020] [Revised: 01/29/2021] [Accepted: 02/21/2021] [Indexed: 02/01/2023]
Abstract
The information about the presence of free radicals in biological materials was given for the first time about 70 years ago. Since then, numerous scientific studies have been conducted and the science of free radicals was born. Today we know that free radicals are by-products of enzymatic reactions occurring in the organism. They are produced during endogenous processes such as: cell respiration, phagocytosis, biosynthesis, catalysis, and biotransformation. They can also be produced by exogenous processes (radiation, sunlight, heavy metals, bacteria, fungi, protozoa and viruses). The overproduction of free radicals affects the aging processes, oxidative stress (OS) and takes part in the pathogenesis of various diseases. Among them are cancer, rheumatoid arthritis, neurodegenerative diseases: Alzheimer and Parkinson, pulmonary diseases, atherosclerosis and DNA damage. Compounds with antioxidant activity are very important nowadays because they allow organisms to keep a balance between the production of free radicals and the speed of their neutralization in the body. Next to the natural antioxidants (flavonoids, carotenoids, vitamins, etc.), synthetic ones are also of great importance. Among synthetic compounds with antioxidant activity are 1,2,4-triazoles and its derivatives. 1,2,4-Triazoles are heterocyclic compounds with three nitrogen atoms. Due to a broad spectrum of biological activities, these derivatives have been of interest to scientists for many years. Some of them are also used as drugs. The finding of new synthetic compounds with antioxidant features in the triazole group has become important problem of medicinal chemistry.
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Affiliation(s)
- Anna Pachuta-Stec
- Independent Radiopharmacy Unit, Faculty of Pharmacy, Medical University of Lublin. Poland
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6
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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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Shirinzadeh H, Ghalia M, Tascioglu A, Adjali FI, Gunesacar G, Gurer-Orhan H, Suzen S. Bioisosteric modification on melatonin: synthesis of new naphthalene derivatives, in vitro antioxidant activity and cytotoxicity studies. BRAZ J PHARM SCI 2020. [DOI: 10.1590/s2175-97902019000418124] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
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Yurchenko EA, Menchinskaya ES, Pislyagin EA, Trinh PTH, Ivanets EV, Smetanina OF, Yurchenko AN. Neuroprotective Activity of Some Marine Fungal Metabolites in the 6-Hydroxydopamin- and Paraquat-Induced Parkinson's Disease Models. Mar Drugs 2018; 16:E457. [PMID: 30469376 PMCID: PMC6265791 DOI: 10.3390/md16110457] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/14/2018] [Accepted: 11/19/2018] [Indexed: 12/28/2022] Open
Abstract
A new melatonin analogue 6-hydroxy-N-acetyl-β-oxotryptamine (1) was isolated from the marine-derived fungus Penicillium sp. KMM 4672. It is the second case of melatonin-related compounds isolation from microfilamentous fungi. The neuroprotective activities of this metabolite, as well as 3-methylorsellinic acid (2) and 8-methoxy-3,5-dimethylisochroman-6-ol (3) from Penicillium sp. KMM 4672, candidusin A (4) and 4″-dehydroxycandidusin A (5) from Aspergillus sp. KMM 4676, and diketopiperazine mactanamide (6) from Aspergillus flocculosus, were investigated in the 6-hydroxydopamine (6-OHDA)- and paraquat (PQ)-induced Parkinson's disease (PD) cell models. All of them protected Neuro2a cells against the damaging influence of 6-OHDA to varying degrees. This effect may be realized via a reactive oxygen species (ROS) scavenging pathway. The new melatonin analogue more effectively protected Neuro2A cells against the 6-OHDA-induced neuronal death, in comparison with melatonin, as well as against the PQ-induced neurotoxicity. Dehydroxylation at C-3″ and C-4″ significantly increased free radical scavenging and neuroprotective activity of candidusin-related p-terphenyl polyketides in both the 6-OHDA- and PQ-induced PD models.
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Affiliation(s)
- Ekaterina A Yurchenko
- Laboratory of Bioassays and Mechanism of Action of Biologically Active Substances, G.B. Elyakov Pacific Institute of Bioorganic Chemistry Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Ekaterina S Menchinskaya
- Laboratory of Bioassays and Mechanism of Action of Biologically Active Substances, G.B. Elyakov Pacific Institute of Bioorganic Chemistry Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Evgeny A Pislyagin
- Laboratory of Bioassays and Mechanism of Action of Biologically Active Substances, G.B. Elyakov Pacific Institute of Bioorganic Chemistry Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Phan Thi Hoai Trinh
- Department of Marine Biotechnology, Nhatrang Institute of Technology Research and Application, Vietnam Academy of Science and Technology, 02 Hung Vuong, Nha Trang 650000, Vietnam.
- Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18 Hoang Quoc Viet, Cau Giay, Ha Noi 100000, Vietnam.
| | - Elena V Ivanets
- Laboratory of Chemistry of Microbial Metabolites, G.B. Elyakov Pacific Institute of Bioorganic Chemistry Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Olga F Smetanina
- Laboratory of Chemistry of Microbial Metabolites, G.B. Elyakov Pacific Institute of Bioorganic Chemistry Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia.
| | - Anton N Yurchenko
- Laboratory of Chemistry of Microbial Metabolites, G.B. Elyakov Pacific Institute of Bioorganic Chemistry Far Eastern Branch of Russian Academy of Sciences, Vladivostok 690022, Russia.
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Shirinzadeh H, Süzen S, Altanlar N, Westwell AD. Antimicrobial Activities of New Indole Derivatives Containing 1,2,4-Triazole, 1,3,4-Thiadiazole and Carbothioamide. Turk J Pharm Sci 2018; 15:291-297. [PMID: 32454672 DOI: 10.4274/tjps.55707] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2017] [Accepted: 10/19/2017] [Indexed: 12/01/2022]
Abstract
Objectives In new antimicrobial drug development studies, indole and its derivatives create an important class of compounds. In addition, azoles and their derivatives were recognized to be associated with a variety of biologic activities such as antibacterial and antifungal. In this study antimicrobial activities of some indole derivatives mainly substituted with 1,2,4-triazole, 1,3,4-thiadiazole and hydrazinecarbothioamide were investigated to evaluate their efficacy. Materials and Methods The efficacy of new compounds was evaluated using 2-fold serial dilutions against Staphylococcus aureus, MRSA, Escherichia coli, Bacillus subtilis, Candida albicans, and Candida krusei. Results The MIC was determined for test compounds and for the reference standards sultamicillin, ampicillin, fluconazole, and ciprofloxacin. Conclusion The compounds possessed a broad spectrum of activity having MIC values of 3.125-50 µg/mL against the tested microorganisms. This study provides valuable evidence that the indole-triazole derivative compound 3d holds significant promise as a novel antibacterial and antifungal lead compound.
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Affiliation(s)
- Hanif Shirinzadeh
- Erzincan University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Erzincan, Turkey
| | - Sibel Süzen
- Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Ankara, Turkey
| | - Nurten Altanlar
- Ankara University, Faculty of Pharmacy, Department of Pharmaceutical Microbiology, Ankara, Turkey
| | - Andrew D Westwell
- Cardiff University, Faculty of Pharmacy, Department of Pharmaceutical Chemistry, Cardiff, United Kingdom
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Ranganathan R, Archana S, Dinesh M, Jaabil G, Nagarajan S, Ponnuswamy A, Saranya K, Murugavel S. A Smart and Efficient One-Pot Green Synthesis of Novel 1, 2, 3-Triazolyl Pyrazoline-/Indazolyl-Carbothioamide Hybrids under Solvent-Free Grinding Strategy at Room Temperature. ChemistrySelect 2018. [DOI: 10.1002/slct.201802346] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Affiliation(s)
- Raja Ranganathan
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
- Department of Chemistry; Mahendra Institute of Engineering & Technology; Namakkal 637 503 Tamilnadu India
| | - Sivasubramaniyan Archana
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
| | - Murugan Dinesh
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
| | - George Jaabil
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
| | - Sangaraiah Nagarajan
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
- Key Laboratory for Radiation Physics and Technology of Ministry of Education; Institute of Nuclear Science and Technology; Sichuan University; Chengdu China
| | - Alagusundaram Ponnuswamy
- Department of Organic Chemistry; School of Chemistry; Madurai Kamaraj University; Madurai 625021 India
| | - Kanagarajan Saranya
- Department of Physics; Thanthai Periyar Government Institute of Technology; Vellore 608 002, Tamilnadu India
| | - Saminathan Murugavel
- Department of Physics; Thanthai Periyar Government Institute of Technology; Vellore 608 002, Tamilnadu India
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Aneja B, Arif R, Perwez A, Napoleon JV, Hasan P, Rizvi MMA, Azam A, Rahisuddin, Abid M. N-Substituted 1,2,3-Triazolyl-Appended Indole-Chalcone Hybrids as Potential DNA Intercalators Endowed with Antioxidant and Anticancer Properties. ChemistrySelect 2018. [DOI: 10.1002/slct.201702913] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Babita Aneja
- Department of Biosciences; Jamia Millia Islamia; Medicinal Chemistry Laboratory, Jamia Nagar; New Delhi 110025 India
- Department of Chemistry; Jamia Millia Islamia, Jamia Nagar; New Delhi 110025 India
| | - Rizwan Arif
- Department of Chemistry; Jamia Millia Islamia, Jamia Nagar; New Delhi 110025 India
| | - Ahmad Perwez
- Department of Biosciences; Jamia Millia Islamia; Genome Biology Laboratory, Jamia Nagar; New Delhi 110025 India
| | - John V. Napoleon
- Eppley Institute for Research in Cancer and Allied Diseases; University of Nebraska Medical Center; Omaha, NE 68198-6805 USA
| | - Phool Hasan
- Department of Biosciences; Jamia Millia Islamia; Medicinal Chemistry Laboratory, Jamia Nagar; New Delhi 110025 India
| | - M. Moshahid A. Rizvi
- Department of Biosciences; Jamia Millia Islamia; Genome Biology Laboratory, Jamia Nagar; New Delhi 110025 India
| | - Amir Azam
- Department of Chemistry; Jamia Millia Islamia, Jamia Nagar; New Delhi 110025 India
| | - Rahisuddin
- Department of Chemistry; Jamia Millia Islamia, Jamia Nagar; New Delhi 110025 India
| | - Mohammad Abid
- Department of Biosciences; Jamia Millia Islamia; Medicinal Chemistry Laboratory, Jamia Nagar; New Delhi 110025 India
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Sztanke M, Sztanke K. Biologically important hydrazide-containing fused azaisocytosines as antioxidant agents. Redox Rep 2017; 22:572-581. [PMID: 28812524 DOI: 10.1080/13510002.2017.1364330] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
Abstract
OBJECTIVES Two important classes of hydrazide-containing fused azaisocytosines were evaluated as possible antioxidants and characterised by UV spectroscopy. METHODS 2,2-Diphenyl-1-picrylhydazyl (DPPH), nitric oxide (NO), hydrogen peroxide (H2O2) scavenging potencies and reducing power of molecules were evaluated. RESULTS The strongest DPPH scavengers were found to be 9, showing the potency superior to that of butylated hydroxyanisole (BHA), butylated hydroxytoluene (BHT), propyl gallate (PG) and 6-hydroxy-2,5,7,8-tetramethylchroman-2-carboxylic acid (Trolox) and comparable to that of ascorbic acid (AA), and 6, revealing the antioxidant potency superior to that of BHA, BHT, PG and Trolox. In turn, 3 and 9 were the most promising NO scavengers, exhibiting the potency superior to that of BHA, BHT (3 and 9) and AA (3). The most potent H2O2 scavengers proved to be 10 and 9 showing similar or even better neutralising potency than that of Trolox, BHT and BHA. Simultaneously, the majority of hydrazides revealed higher ferric reducing abilities than that of AA and BHT. Some structure-activity relationships were explored. A possible mechanism for the DPPH radical scavenging ability of hydrazide-containing molecules was proposed. DISCUSSION Hydrazides 3, 6 and 9 with an antioxidant potential better or comparable to that of the well-known antioxidants are proposed as new antioxidant candidates.
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Affiliation(s)
- Małgorzata Sztanke
- a Department of Medical Chemistry , Medical University , Lublin , Poland
| | - Krzysztof Sztanke
- b Laboratory of Bioorganic Synthesis and Analysis, Department of Medical Chemistry , Medical University , Lublin , Poland
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13
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Damião MCFCB, Galaverna R, Kozikowski AP, Eubanks J, Pastre JC. Telescoped continuous flow generation of a library of highly substituted 3-thio-1,2,4-triazoles. REACT CHEM ENG 2017. [DOI: 10.1039/c7re00125h] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An integrated continuous flow process for the synthesis of 3-thio-1,2,4-triazoles is reported. A small library of 18 compounds was prepared in just 48 minutes of residence time in moderate to excellent yields.
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Affiliation(s)
| | - Renan Galaverna
- Institute of Chemistry
- University of Campinas - UNICAMP
- Campinas
- Brazil
| | | | - James Eubanks
- Division of Genetics and Development
- Krembil Research Institute
- Toronto
- Canada
| | - Julio C. Pastre
- Institute of Chemistry
- University of Campinas - UNICAMP
- Campinas
- Brazil
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