1
|
Morán-Serradilla C, Plano D, Sanmartín C, Sharma AK. Selenization of Small Molecule Drugs: A New Player on the Board. J Med Chem 2024; 67:7759-7787. [PMID: 38716896 DOI: 10.1021/acs.jmedchem.3c02426] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/24/2024]
Abstract
There is an urgent need to develop safer and more effective modalities for the treatment of a wide range of pathologies due to the increasing rates of drug resistance, undesired side effects, poor clinical outcomes, etc. Throughout the years, selenium (Se) has attracted a great deal of attention due to its important role in human health. Besides, a growing body of work has unveiled that the inclusion of Se motifs into a great number of molecules is a promising strategy for obtaining novel therapeutic agents. In the current Perspective, we have gathered the most recent literature related to the incorporation of different Se moieties into the scaffolds of a wide range of known drugs and their feasible pharmaceutical applications. In addition, we highlight different representative examples as well as provide our perspective on Se drugs and the possible future directions, promises, opportunities, and challenges of this ground-breaking area of research.
Collapse
Affiliation(s)
| | - Daniel Plano
- Department of Pharmaceutical Sciences, University of Navarra, Irunlarrea 1, Pamplona E-31008, Spain
| | - Carmen Sanmartín
- Department of Pharmaceutical Sciences, University of Navarra, Irunlarrea 1, Pamplona E-31008, Spain
| | - Arun K Sharma
- Department of Pharmacology, Penn State College of Medicine, 500 University Drive, Hershey, Pennsylvania 17033, United States
- Penn State Cancer Institute, 400 University Drive,Hershey, Pennsylvania 17033, United States
| |
Collapse
|
2
|
Sufian A, Parihar N, Badirujjaman M, Barman P, Kesarwani R, Pemmaraju DB, Bhabak KP. Inflammatory-stimuli-responsive turn-on NIR fluorogenic theranostic prodrug: adjuvant delivery of diclofenac and hydrogen sulfide attenuates acute inflammatory disorders. J Mater Chem B 2024; 12:4248-4261. [PMID: 38602387 DOI: 10.1039/d3tb02552g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
Prolonged use of very commonly prescribed non-steroidal anti-inflammatory drugs (NSAIDs) is often associated with undesired side effects, including gastrointestinal ulcers due to the non-selective inhibition of cyclooxygenases. We describe the development of an inflammatory-stimuli-responsive turn-on fluorogenic theranostic prodrug DCF-HS for adjuvant drug delivery. Upon activation by reactive oxygen species (ROS), the prodrug releases diclofenac DCF (active drug) and the NIR fluorophore DCI-NH2 along with carbonyl sulfide (COS). The second activation of COS by the enzyme carbonic anhydrase (CA) generates hydrogen sulfide (H2S). The prodrug was conveniently synthesized using multi-step organic synthesis. The UV-Vis and fluorescence studies revealed the selective reactivity of DCF-HS towards ROS such as H2O2 in the aqueous phase and the desired uncaging of the drug DCF with turn-on NIR fluorescent reporter under physiological conditions. Furthermore, the release of fluorophore DCI-NH2 and drug DCF was confirmed using the reverse phase HPLC method. Compatibility of prodrug activation was studied next in the cellular medium. The prodrug DCF-HS was non-toxic in a representative cancer cell line (HeLa) and a macrophage cell line (RAW 264.7) up to 100 μM concentration, indicating its biocompatibility. The intracellular ROS-mediated activation of the prodrug with the release of NIR dye DCI-NH2 and H2S was investigated in HeLa cells using the H2S-selective probe WSP2. The anti-inflammatory activity of the active drug DCF from the prodrug DCF-HS was studied in the lipopolysaccharide (LPS)-induced macrophage cell line and compared to that of the parent drug DCF using western blot analysis and it was found that the active drug resulted in pronounced inhibition of COX-2 in a dose-dependent manner. Finally, the anti-inflammatory potential of the prodrug and the turn-on fluorescence were validated in the inflammation-induced Wister rat models.
Collapse
Affiliation(s)
- Abu Sufian
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Nidhi Parihar
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education & Research, Guwahati 781101, Assam, India.
| | - Md Badirujjaman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Pallavi Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Rahul Kesarwani
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| | - Deepak B Pemmaraju
- Department of Pharmacology & Toxicology, National Institute of Pharmaceutical Education & Research, Guwahati 781101, Assam, India.
| | - Krishna P Bhabak
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
| |
Collapse
|
3
|
Frąckowiak-Wojtasek B, Gąsowska-Bajger B, Tarasek D, Mytnik M, Wojtasek H. Oxidation of anti-thyroid drugs and their selenium analogs by ABTS radical cation. Bioorg Chem 2023; 141:106891. [PMID: 37788560 DOI: 10.1016/j.bioorg.2023.106891] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2023] [Revised: 09/22/2023] [Accepted: 09/25/2023] [Indexed: 10/05/2023]
Abstract
Lactoperoxidase was previously used as a model enzyme to test the inhibitory activity of selenium analogs of anti-thyroid drugs with 2,2'-azino-bis(3-ethylbenzothiazoline-6-sulfonic acid) (ABTS) as a substrate. Peroxidases oxidize ABTS to a metastable radical ABTS•+, which is readily reduced by many antioxidants, including thiol-containing compounds, and it has been used for decades to measure antioxidant activity in biological samples. We showed that anti-thyroid drugs 6-n-propyl-2-thiouracil, methimazole, and selenium analogs of methimazole also reduced it rapidly. This reaction may explain the anti-thyroid action of many other compounds, particularly natural antioxidants, which may reduce the oxidized form of iodine and/or tyrosyl radicals generated by thyroid peroxidase thus decreasing the production of thyroid hormones. However, influence of selenium analogs of methimazole on the rate of hydrogen peroxide consumption during oxidation of ABTS by lactoperoxidase was moderate. Direct hydrogen peroxide reduction, proposed before as their mechanism of action, cannot therefore account for the observed inhibitory effects. 1-Methylimidazole-2-selone and its diselenide were oxidized by ABTS•+ to relatively stable seleninic acid, which decomposed slowly to selenite and 1-methylimidazole. In contrast, oxidation of 1,3-dimethylimidazole-2-selone gave selenite and 1,3-dimethylimidazolium cation. Accumulation of the corresponding seleninic acid was not observed.
Collapse
Affiliation(s)
| | | | - Damian Tarasek
- Institute of Chemistry, Opole University, Ul. Oleska 48, 45-052 Opole, Poland
| | - Martyna Mytnik
- Institute of Chemistry, Opole University, Ul. Oleska 48, 45-052 Opole, Poland
| | - Hubert Wojtasek
- Institute of Chemistry, Opole University, Ul. Oleska 48, 45-052 Opole, Poland.
| |
Collapse
|
4
|
Sufian A, Badirujjaman M, Barman P, Bhabak KP. Dual-Stimuli-Activatable Hybrid Prodrug for the Self-Immolative Delivery of an Anticancer Agent and Hydrogen Sulfide with Turn-On Fluorescence. Chemistry 2023; 29:e202302197. [PMID: 37665099 DOI: 10.1002/chem.202302197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/18/2023] [Accepted: 09/04/2023] [Indexed: 09/05/2023]
Abstract
Stimuli-responsive fluorogenic prodrugs are advantageous for the targeted drug delivery enabling real-time non-invasive monitoring with turn-on fluorescence. We report herein the dual-stimuli (ROS and CA)-responsive thiocarbamate-based prodrug (AM-TCB) for the turn-on fluorogenic delivery of the naphthalimide-based anticancer agent amonafide along with the gasotransmitter hydrogen sulfide (H2 S). A carbamate-based prodrug AM-CB was also designed, capable of releasing the anticancer agent amonafide without any H2 S. The prodrugs were synthesized using multi-step organic synthesis. UV-Vis and fluorescence spectroscopic studies revealed selective reactivity of the boronate ester group of prodrugs towards ROS (primarily H2 O2 ) with the release of amonafide and COS/CO2 via self-immolative processes. Hydrolysis of the generated COS by carbonic anhydrase (CA) produces H2 S. While the prodrug AM-TCB retained the anticancer activity of free amonafide in cancer cells (MDA-MB-231 and HeLa), unlike amonafide, it enhanced the cellular viability of the non-malignant cells (HEK-293). Fluorescence imaging in HeLa cells revealed the simultaneous delivery of the anticancer agent and H2 S from AM-TCB with turn-on fluorescence. Western blot studies further revealed the cytoprotective effects of the released H2 S from AM-TCB. The present adjuvant strategy therefore would be helpful in future for ameliorating the anticancer drug-induced side-effects.
Collapse
Affiliation(s)
- Abu Sufian
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Md Badirujjaman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Pallavi Barman
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| | - Krishna P Bhabak
- Department of Chemistry, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
- Jyoti and Bhupat Mehta School of Health Sciences and Technology, Indian Institute of Technology Guwahati, Guwahati, 781039, Assam, India
| |
Collapse
|
5
|
Rhenium(I)-tricarbonyl complexes with methimazole and its selenium analogue: Syntheses, characterization and cell toxicity. J Inorg Biochem 2023; 240:112092. [PMID: 36549168 DOI: 10.1016/j.jinorgbio.2022.112092] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2022] [Revised: 11/24/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022]
Abstract
This study explores the effect of a thione/selone ligand on the cell toxicity (in vitro) and light activity of diimine Re(CO)3+ complexes. Six rhenium(I) complexes with general formula fac-[Re(CO)3(N,N')X]+ were prepared, where X = 2-mercapto-1-methylimidazole (methimazole; MMI), and 1-methylimidazole-2-selone (MSeI); N,N' = 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen) and 2,9-dimethyl-1,10-phenanthroline (dmphen). Their triflate salts were characterized using single-crystal X-ray diffraction, 1H, 13C and 2D NMR, UV-vis and vibrational spectroscopy. Their cytotoxic properties were tested, showing significant cytotoxicity (IC50 = 8.0-55 μM) towards the human breast cancer cell line MDA-MB-231. The half-inhibitory concentration (IC50) for fac-[Re(CO)3(dmphen)(MMI)]+, the most toxic complex in this series (8.0 ± 0.2 μM), was comparable to that of the corresponding aqua complex fac-[Re(CO)3(dmphen)(H2O)]+ with IC50 = 6.0 ± 0.1 μM. The fac-[Re(CO)3(bpy)(MMI/MSeI)]+ complexes were somewhat less toxic towards the human embryonic kidney cell line HEK-293 T after 48 h of exposure. The stability of the complexes upon irradiation was monitored using UV-vis spectroscopy, with no CO released when exposed to UV-A light (λ = 365 nm).
Collapse
|
6
|
Moussa Z, Kaddoura R, Saadeh HA, Abutaha N, Ahmed SA. Highly bioactive novel aryl-, benzyl-, and piperazine-selenoureas: synthesis, structural characterization and in vitro biological evaluation. Heliyon 2022; 8:e10709. [PMID: 36185149 PMCID: PMC9520223 DOI: 10.1016/j.heliyon.2022.e10709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Revised: 07/23/2022] [Accepted: 09/15/2022] [Indexed: 11/29/2022] Open
Abstract
Selenoureas are widespread as useful elements for constructing important species and biologically active molecules. Finding an efficient and straightforward method to prepare this motif and biologically screen derivatives thereof is crucial. Herein, we demonstrate the effectiveness of using ethanol as a solvent in the preparation of various substituted aryl-, benzyl-, and piperazine-selenoureas from isoselenocyanates and amines. The synthetic method includes mild reaction conditions, large substrate scope, and good isolated yields. Biological evaluation of the prepared products on MDA-MB-231 and MCF-7 cancer cell lines revealed several remarkably active compounds (IC50 < 10 μΜ) with the best one exhibiting IC50 values of 1.8 μΜ and 1.2 μΜ observed against the challenging former triple-negative breast cancer cell line and the latter one, respectively. The chemical structures of all new compounds were fully characterized by multinuclear nuclear magnetic resonance (NMR) spectroscopy and high accuracy mass measurements.
Collapse
Affiliation(s)
- Ziad Moussa
- Department of Chemistry, College of Science, United Arab Emirates University, P. O. Box 15551, Al Ain, United Arab Emirates
| | - Ranem Kaddoura
- Department of Chemistry, College of Science, United Arab Emirates University, P. O. Box 15551, Al Ain, United Arab Emirates
| | - Haythem A Saadeh
- Department of Chemistry, School of Science, The University of Jordan, Amman 11942, Jordan
| | - Nael Abutaha
- Department of Zoology, College of Science, King Saud University, P.O. Box 2455, Riyadh, Saudi Arabia
| | - Saleh A Ahmed
- Department of Chemistry, Faculty of Applied Sciences, Umm Al-Qura University, Makkah 21955, Saudi Arabia.,Department of Chemistry, Faculty of Science, Assiut University, 71516 Assiut, Egypt
| |
Collapse
|
7
|
Tang Y, Yu B. A Mild Heteroatom (O-, N-, and S-) Methylation Protocol Using Trimethyl Phosphate (TMP)–Ca(OH)2Combination. SYNTHESIS-STUTTGART 2022. [DOI: 10.1055/a-1731-3852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
AbstractA mild heteroatom methylation protocol using trimethyl phosphate (TMP)–Ca(OH)2 combination has been developed, which proceeds in DMF, or water, or under neat conditions, at 80 °C or at room temperature. A series of O-, N-, and S-nucleophiles, including phenols, sulfonamides, N-heterocycles, such as 9H-carbazole, indole derivatives, and 1,8-naphthalimide, and aryl/alkyl thiols, are suitable substrates for this protocol. The high efficiency, operational simplicity, scalability, cost-efficiency, and environmentally friendly nature of this protocol make it an attractive alternative to the conventional base-promoted heteroatom methylation procedures.
Collapse
|
8
|
Zinc(II) thione and selone complexes: The effect of metal redox activity on ligand-based oxidation. Inorganica Chim Acta 2020. [DOI: 10.1016/j.ica.2019.119379] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
|
9
|
Khudina OG, Ivanova AE, Burgart YV, Pervova MG, Shatunova TV, Borisevich SS, Khursan SL, Saloutin VI. Alkylation of 6-Polyfluoroalkyl-2-thiouracils with Haloalkanes. RUSSIAN JOURNAL OF ORGANIC CHEMISTRY 2019. [DOI: 10.1134/s1070428019060071] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
10
|
Lamani DS, Badiger SG, Singh M. Formation of diaryl sulfides and sulfoxides: Synthesis, characterization and structure activity correlation studies. PHOSPHORUS SULFUR 2019. [DOI: 10.1080/10426507.2018.1547720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Devappa S. Lamani
- Department of Chemistry, Basaveshawar Science College, Bagalkot. Rani Channamma University, Belagavi, Karnataka, India
| | - Srikant G. Badiger
- Department of Chemistry, Basaveshawar Science College, Bagalkot. Rani Channamma University, Belagavi, Karnataka, India
| | - Mamata Singh
- Department of Chemistry, Gandhi Institute of Technology and Management University (GITAM), Bangalore, Karnataka, India
| |
Collapse
|
11
|
Rai RK, Chalana A, Karri R, Das R, Kumar B, Roy G. Role of Hydrogen Bonding by Thiones in Protecting Biomolecules from Copper(I)-Mediated Oxidative Damage. Inorg Chem 2019; 58:6628-6638. [DOI: 10.1021/acs.inorgchem.8b03212] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
|
12
|
Anionic Bismuth(III) chloride cluster with diselenide countercations: Application in C-S cross coupling reactions. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.01.017] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
13
|
Tian F, Chen Y, Wu L, Li P, Lu S. An Efficient Synthesis of 1,3-Dialkylimidazole-2-Selenones. JOURNAL OF CHEMICAL RESEARCH 2019. [DOI: 10.3184/174751914x14007821182269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Affiliation(s)
- Fengshou Tian
- Department of Chemistry, Zhoukou Normal University, Zhoukou Henan, 466001, P.R. China
| | - Yahong Chen
- Department of Chemistry, Zhoukou Normal University, Zhoukou Henan, 466001, P.R. China
| | - Lan Wu
- Department of Chemistry, Zhoukou Normal University, Zhoukou Henan, 466001, P.R. China
| | - Peng Li
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, P.R. China
| | - Shiwei Lu
- Dalian Institute of Chemical Physics, Chinese Academy of Sciences, 457 Zhongshan Road, Dalian, Liaoning, 116023, P.R. China
| |
Collapse
|
14
|
Ritch JS. Synthesis and coordination chemistry of cyclic seleno- and telluroureas. PHYSICAL SCIENCES REVIEWS 2018. [DOI: 10.1515/psr-2017-0128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Abstract
Chalcogenated derivatives of N-heterocyclic carbene ligands have received increasing attention due to their diverse chemical reactivity and potential applications in fields such as medicine and materials chemistry. This chapter summarizes the synthetic methods for the preparation of cyclic heavy chalcogenoureas featuring heterocyclic cores and explores their diverse coordination chemistry with p- and d-block metals.
Collapse
Affiliation(s)
- Jamie S. Ritch
- Department of Chemistry , The University of Winnipeg , 515 Portage Avenue , Winnipeg , Manitoba R3B 2E9 , Canada
| |
Collapse
|
15
|
Shangpliang OR, Kshiar B, Wanniang K, Marpna ID, Lipon TM, Laloo BM, Myrboh B. Selenium Dioxide As an Alternative Reagent for the Direct α-Selenoamidation of Aryl Methyl Ketones. J Org Chem 2018; 83:5829-5835. [DOI: 10.1021/acs.joc.8b00558] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Affiliation(s)
- O. Risuklang Shangpliang
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Baskhemlang Kshiar
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Kmendashisha Wanniang
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Ibakyntiew D. Marpna
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Tyrchain Mitre Lipon
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Badaker M. Laloo
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| | - Bekington Myrboh
- Centre for Advanced Studies in Chemistry, Department of Chemistry, North-Eastern Hill University, Shillong 793022, India
| |
Collapse
|
16
|
Banerjee K, Padmavathi G, Bhattacherjee D, Saha S, Kunnumakkara AB, Bhabak KP. Potent anti-proliferative activities of organochalcogenocyanates towards breast cancer. Org Biomol Chem 2018; 16:8769-8782. [DOI: 10.1039/c8ob01891j] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The synthesis of benzylic and mesitylenic organochalcogenocyanates has been described and the compounds have been studied for their anti-proliferative activities in breast cancer cells (MDA-MB-231, MCF-7 and T-47D).
Collapse
Affiliation(s)
- Kaustav Banerjee
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Ganesan Padmavathi
- Cancer Biology Laboratory & DBT-AIST International Laboratory for Advanced Biomedicine (DAILAB)
- Department of Biosciences and Bioengineering
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Debojit Bhattacherjee
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
- Centre for the Environment
| | - Suchismita Saha
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Ajaikumar B. Kunnumakkara
- Cancer Biology Laboratory & DBT-AIST International Laboratory for Advanced Biomedicine (DAILAB)
- Department of Biosciences and Bioengineering
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
| | - Krishna P. Bhabak
- Department of Chemistry
- Indian Institute of Technology Guwahati
- Guwahati-781039
- India
- Centre for the Environment
| |
Collapse
|
17
|
Zwitterionic structures: from physicochemical properties toward computer-aided drug designs. Future Med Chem 2016; 8:2245-2262. [DOI: 10.4155/fmc-2016-0176] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
Zwitterions, used widely in chemical, biological and medicinal fields, show distinct physicochemical properties relative to ordinary ampholytes, which largely decide their bioavailability and biological activities. In the present manuscript, these properties are discussed in order to facilitate our understanding of zwitterionic structures, followed by various examples of zwitterionic drugs and the critical role these properties play. We specifically focus our discussions on neuraminidase inhibitors (NAIs), which are used in the treatment and prevention of influenza, covering their computer-assisted design, transformation to zwitterionic isomers and interaction mechanisms of NAIs with proteins. The discovery and development of NAIs provide useful insights that may assist in the exploration of new zwitterionic drugs.
Collapse
|
18
|
Vaddamanu M, Karupnaswamy R, Srinivas K, Prabusankar G. Facile Access to Diselenide Containing Macrocyclic Ring from Diselone. ChemistrySelect 2016. [DOI: 10.1002/slct.201601176] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Moulali Vaddamanu
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi, Medak, Telangana INDIA- 502 285
| | - Ramesh Karupnaswamy
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi, Medak, Telangana INDIA- 502 285
| | - Katam Srinivas
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi, Medak, Telangana INDIA- 502 285
| | - Ganesan Prabusankar
- Department of Chemistry; Indian Institute of Technology Hyderabad; Kandi, Medak, Telangana INDIA- 502 285
| |
Collapse
|
19
|
Prasanthkumar KP, Alvarez-Idaboy JR, Kumar PV, Singh BG, Priyadarsini KI. Contrasting reactions of hydrated electron and formate radical with 2-thio analogues of cytosine and uracil. Phys Chem Chem Phys 2016; 18:28781-28790. [DOI: 10.1039/c6cp04483b] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
2-thiocytosine (TC) and 2-thiouracil (TU) were found to react with formate radical via reductive and oxidative pathways simultaneously.
Collapse
Affiliation(s)
| | - Juan R. Alvarez-Idaboy
- Departamento de Física y Química Teórica
- Facultad de Química
- Universidad Nacional Autónoma de México
- México D. F
- Mexico
| | - Pavitra V. Kumar
- Radiation and Photochemistry Division
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - Beena G. Singh
- Radiation and Photochemistry Division
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| | - K. Indira Priyadarsini
- Radiation and Photochemistry Division
- Chemistry Group
- Bhabha Atomic Research Centre
- Mumbai 400085
- India
| |
Collapse
|
20
|
Schmidt A, Wiechmann S, Otto CF. N-Heterocyclic Carbenes. ADVANCES IN HETEROCYCLIC CHEMISTRY 2016. [DOI: 10.1016/bs.aihch.2016.02.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
|
21
|
Ahmida A, Flörke U, Egold H, Henkel G. Crystal structure of dichloridobis(1,3,4,5-tetramethyl-1 H-imidazol-2-ium-2-thiolate-κ S)nickel(II). Acta Crystallogr E Crystallogr Commun 2015; 71:m147. [PMID: 26396777 PMCID: PMC4571377 DOI: 10.1107/s2056989015012281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2015] [Accepted: 06/26/2015] [Indexed: 12/02/2022]
Abstract
In the molecular structure of the title compound, [NiCl2(C7H12N2S)2], the NiII atom has a distorted tetrahedral geometry, coordinated by two Cl atoms [Ni—Cl= 2.2336 (6) Å] and two thione S atoms [Ni—S= 2.3024 (6) Å]. The angles at the NiII cation, which lies on a twofold rotation axis, are Cl—Ni—Cl = 115.58 (3)° and S—Ni—S = 94.55 (3)°. All other angles at the central NiII atom range from 109.46 (2) to 112.96 (2)°. The C—S—Ni angle is 99.91 (6)°. The planes of two imidazolium rings make a dihedral angle of 70.56 (6)°.
Collapse
|
22
|
Lamani DS, Bhowmick D, Mugesh G. Substituent effects on the stability and antioxidant activity of spirodiazaselenuranes. Molecules 2015; 20:12959-78. [PMID: 26193249 PMCID: PMC6332218 DOI: 10.3390/molecules200712959] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2015] [Revised: 07/08/2015] [Accepted: 07/14/2015] [Indexed: 12/19/2022] Open
Abstract
Spirodiazaselenuranes are structurally interesting compounds and the stability of these compounds depends highly on the nature of the substituents attached to the nitrogen atoms. Aromatic substituents are known to play important roles in stabilizing the Se-N bonds in spiro compounds. In this study, several spirodiazaselenuranes are synthesized by introducing benzylic and aliphatic substituents to understand their effect on the stability of the Se-N bonds and the antioxidant activity. Replacement of phenyl substituent by benzyl/alkyl groups significantly reduces the stability of the spirodiazaselenuranes and slows down the oxidative cyclization process. The selenium centre in the spiro compounds undergoes further oxidation to produce the corresponding selenurane oxides, which are stable at room temperature. Comparison of the glutathione peroxidase (GPx) mimetic activity of the compounds showed that the diaryl selenides having heterocyclic rings are significantly more active due to the facile oxidation of the selenium centre. However, the activity is reduced significantly for compounds having aliphatic substituents. In addition to GPx activity, the compounds also inhibit peroxynitrite-mediated nitration and oxidation reaction of protein and small molecules, respectively. The experimental observations suggest that the antioxidant activity is increased considerably upon substitution of the aromatic group with the benzylic/aliphatic substituents on the nitrogen atoms.
Collapse
Affiliation(s)
- Devappa S Lamani
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Debasish Bhowmick
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
| | - Govindasamy Mugesh
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore-560012, India.
| |
Collapse
|
23
|
Zhou L, Zhu D, Zhang S, Pan B. A settling curve modeling method for quantitative description of the dispersion stability of carbon nanotubes in aquatic environments. J Environ Sci (China) 2015; 29:1-10. [PMID: 25766007 DOI: 10.1016/j.jes.2014.05.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2014] [Revised: 05/09/2014] [Accepted: 05/09/2014] [Indexed: 06/04/2023]
Abstract
Understanding the aggregation and deposition behavior of carbon nanotubes (CNTs) is of great significance in terms of their fate and transport in the environment. Attachment efficiency is a widely used index for well-dispersed CNT solutions. However, in natural waters, CNTs are usually heterogeneous in particle size. The attachment efficiency method is not applicable to such systems. Describing the dispersion stability of CNTs in natural aquatic systems is still a challenge. In this work, a settling curve modeling (SCM) method was developed for the description of the aggregation and deposition behavior of CNTs in aqueous solutions. The effects of water chemistry (natural organic matter, pH, and ionic strength) on the aggregation and deposition behavior of pristine and surface-functionalized multi-walled carbon nanotubes (MWCNTs) were systematically studied to evaluate the reliability of the SCM method. The results showed that, as compared to particle size and optical density, the centrifugal sedimentation rate constant (ks) from the settling curve profile is a practical, useful and reliable index for the description of heterogeneous CNT suspensions. The SCM method was successfully applied to MWCNT in three natural waters. The constituents in water, especially organic matter, determine the dispersion stability of MWCNTs in natural water bodies.
Collapse
Affiliation(s)
- Lixia Zhou
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Dunxue Zhu
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| | - Shujuan Zhang
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China.
| | - Bingcai Pan
- State Key Laboratory of Pollution Control and Resource Reuse, School of the Environment, Nanjing University, Nanjing 210023, China
| |
Collapse
|
24
|
Zimmerman MT, Bayse CA, Ramoutar RR, Brumaghim JL. Sulfur and selenium antioxidants: challenging radical scavenging mechanisms and developing structure-activity relationships based on metal binding. J Inorg Biochem 2014; 145:30-40. [PMID: 25600984 DOI: 10.1016/j.jinorgbio.2014.12.020] [Citation(s) in RCA: 81] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2014] [Revised: 12/17/2014] [Accepted: 12/19/2014] [Indexed: 11/30/2022]
Abstract
Because sulfur and selenium antioxidants can prevent oxidative damage, numerous animal and clinical trials have investigated the ability of these compounds to prevent the oxidative stress that is an underlying cause of cardiovascular disease, Alzheimer's disease, and cancer, among others. One of the most common sources of oxidative damage is metal-generated hydroxyl radical; however, very little research has focused on determining the metal-binding abilities and structural attributes that affect oxidative damage prevention by sulfur and selenium compounds. In this review, we describe our ongoing investigations into sulfur and selenium antioxidant prevention of iron- and copper-mediated oxidative DNA damage. We determined that many sulfur and selenium compounds inhibit Cu(I)-mediated DNA damage and that DNA damage prevention varies dramatically when Fe(II) is used in place of Cu(I) to generate hydroxyl radical. Oxidation potentials of the sulfur or selenium compounds do not correlate with their ability to prevent DNA damage, highlighting the importance of metal coordination rather than reactive oxygen species scavenging as an antioxidant mechanism. Additional gel electrophoresis, mass spectrometry, and UV-visible studies confirmed sulfur and selenium antioxidant binding to Cu(I) and Fe(II). Ultimately, our studies established that both the hydroxyl-radical-generating metal ion and the chemical environment of the sulfur or selenium significantly affect DNA damage prevention and that metal coordination is an essential mechanism for these antioxidants.
Collapse
Affiliation(s)
| | - Craig A Bayse
- Department of Chemistry and Biochemistry, Old Dominion University, Hampton Boulevard, Norfolk, VA 23529, USA
| | - Ria R Ramoutar
- Department of Chemistry, Clemson University, Clemson, SC 29634-0973, USA
| | - Julia L Brumaghim
- Department of Chemistry, Clemson University, Clemson, SC 29634-0973, USA.
| |
Collapse
|
25
|
Flörke U, Ahmida A, Egold H, Henkel G. Crystal structure of bis-[1,3,4,5-tetra-methyl-1H-imidazole-2(3H)-thione-κS]chlorido-copper(I). Acta Crystallogr Sect E Struct Rep Online 2014; 70:m397-8. [PMID: 25553008 PMCID: PMC4257435 DOI: 10.1107/s1600536814024404] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2014] [Accepted: 11/06/2014] [Indexed: 11/21/2022]
Abstract
The molecular structure of the title compound, [CuCl(C7H12N2S)2], shows a slightly distorted trigonal–planar coordination geometry of the Cu atom. The Cu—Cl bond measures 2.2287 (9) Å, and the two Cu—S bonds are significantly different from each other, with values of 2.2270 (10) and 2.2662 (10) Å. Also, the S—Cu—Cl angles differ, with values of 113.80 (4) and 124.42 (4)°, while the S—Cu—S angle is 121.51 (4)°. The two imidazole rings are almost parallel, making a dihedral angle of 2.1 (2)°. In the crystal, the shortest C—H⋯Cl interactions stabilize a three-dimensional network with molecules linked into centrosymmetric dimers that are stacked along the b-axis direction.
Collapse
Affiliation(s)
- Ulrich Flörke
- Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany
| | - Aziza Ahmida
- Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany
| | - Hans Egold
- Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany
| | - Gerald Henkel
- Department Chemie, Fakultät für Naturwissenschaften, Universität Paderborn, Warburgerstrasse 100, D-33098 Paderborn, Germany
| |
Collapse
|
26
|
Ma F, Sun M, Zhang K, Zhang Y, Zhu H, Wu L, Huang D, Wang S. An oxidative cleavage-based ratiometric fluorescent probe for hypochlorous acid detection and imaging. RSC Adv 2014. [DOI: 10.1039/c4ra09611h] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
|
27
|
Three-component reaction of imidazoles, cyanophenylacetylene, and chalcogens: stereoselective synthesis of 3-alkenyl-2-imidazolethiones and -selones. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.10.094] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
28
|
Manna D, Roy G, Mugesh G. Antithyroid drugs and their analogues: synthesis, structure, and mechanism of action. Acc Chem Res 2013; 46:2706-15. [PMID: 23883148 DOI: 10.1021/ar4001229] [Citation(s) in RCA: 113] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Thyroid hormones are essential for the development and differentiation of all cells of the human body. They regulate protein, fat, and carbohydrate metabolism. In this Account, we discuss the synthesis, structure, and mechanism of action of thyroid hormones and their analogues. The prohormone thyroxine (T4) is synthesized on thyroglobulin by thyroid peroxidase (TPO), a heme enzyme that uses iodide and hydrogen peroxide to perform iodination and phenolic coupling reactions. The monodeiodination of T4 to 3,3',5-triiodothyronine (T3) by selenium-containing deiodinases (ID-1, ID-2) is a key step in the activation of thyroid hormones. The type 3 deiodinase (ID-3) catalyzes the deactivation of thyroid hormone in a process that removes iodine selectively from the tyrosyl ring of T4 to produce 3,3',5'-triiodothyronine (rT3). Several physiological and pathological stimuli influence thyroid hormone synthesis. The overproduction of thyroid hormones leads to hyperthyroidism, which is treated by antithyroid drugs that either inhibit the thyroid hormone biosynthesis and/or decrease the conversion of T4 to T3. Antithyroid drugs are thiourea-based compounds, which include propylthiouracil (PTU), methimazole (MMI), and carbimazole (CBZ). The thyroid gland actively concentrates these heterocyclic compounds against a concentration gradient. Recently, the selenium analogues of PTU, MMI, and CBZ attracted significant attention because the selenium moiety in these compounds has a higher nucleophilicity than that of the sulfur moiety. Researchers have developed new methods for the synthesis of the selenium compounds. Several experimental and theoretical investigations revealed that the selone (C═Se) in the selenium analogues is more polarized than the thione (C═S) in the sulfur compounds, and the selones exist predominantly in their zwitterionic forms. Although the thionamide-based antithyroid drugs have been used for almost 70 years, the mechanism of their action is not completely understood. Most investigations have revealed that MMI and PTU irreversibly inhibit TPO. PTU, MTU, and their selenium analogues also inhibit ID-1, most likely by reacting with the selenenyl iodide intermediate. The good ID-1 inhibitory activity of PTU and its analogues can be ascribed to the presence of the -N(H)-C(═O)- functionality that can form hydrogen bonds with nearby amino acid residues in the selenenyl sulfide state. In addition to the TPO and ID-1 inhibition, the selenium analogues are very good antioxidants. In the presence of cellular reducing agents such as GSH, these compounds catalytically reduce hydrogen peroxide. They can also efficiently scavenge peroxynitrite, a potent biological oxidant and nitrating agent.
Collapse
Affiliation(s)
- Debasish Manna
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| | - Gouriprasanna Roy
- Department of Chemistry, School of Natural Sciences, Shiv Nadar University, Dadri 203207, Uttar Pradesh, India
| | - Govindasamy Mugesh
- Department of Inorganic & Physical Chemistry, Indian Institute of Science, Bangalore 560012, India
| |
Collapse
|
29
|
Kimani MM, Bayse CA, Stadelman BS, Brumaghim JL. Oxidation of Biologically Relevant Chalcogenones and Their Cu(I) Complexes: Insight into Selenium and Sulfur Antioxidant Activity. Inorg Chem 2013; 52:11685-7. [DOI: 10.1021/ic401366c] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Martin M. Kimani
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States
| | - Craig A. Bayse
- Department of Chemistry and Biochemistry, Old Dominion University, Hampton Boulevard, Norfolk, Virginia 23529, United States
| | - Bradley S. Stadelman
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States
| | - Julia L. Brumaghim
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634-0973, United States
| |
Collapse
|
30
|
Prasanthkumar KP, Suresh CH, Aravindakumar CT. Oxidation reactions of 2-thiouracil: a theoretical and pulse radiolysis study. J Phys Chem A 2012; 116:10712-20. [PMID: 23061532 DOI: 10.1021/jp303808r] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The reaction of hydroxyl radical ((•)OH) with the nucleic acid base analogue 2-thiouracil (1) has been studied by pulse radiolysis experiments and DFT. The generic intermediate radicals feasible for the (•)OH reactions with 1, namely, one electron oxidation product (1(•+)), (•)OH-adducts (3(•), 4(•), and 5(•)), and H-abstracted radicals (6(•) and 7(•)), were characterized by interpreting their electronic and structural properties along with calculated energetics and UV-vis spectra. Pulse radiolysis experiments showed that the transient formed in the reaction of (•)OH with 1 in water at pH 6.5 has λ(max) at 430 nm. A bimolecular rate constant, k(2) of 9.6 × 10(9) M(-1) s(-1), is determined for this reaction via competition kinetics with 2-propanol. The experiments suggested that the transient species could be a dimer radical cation 2(•+), formed by the reaction of 1 with the radical cation 1(•+). For this reaction, an equilibrium constant of 4.7 × 10(3) M(-1) was determined. The transient formed in the reaction of 1 with pulse radiolytically produced Br(2)(•-) at pH 6.5 as well as Cl(2)(•-) at pH 1 has also produced λ(max) at 430 nm and suggested the formation of 2(•+). The calculated UV-vis spectra of the transient species (1(•+), 3(•), 4(•), 5(•), 6(•), and 7(•)) showed no resemblance to the experimental spectra, while that of 2(•+) (λ(max) = 420 nm) agreed well with the experimental value and thus confirmed the formation of 2(•+). The 420 nm peak was due to σ → σ* electronic excitation centered on a 2-center-3-electron (2c-3e) sulfur-sulfur bond [-S∴S-]. 2(•+) is the first reported example of a dimer radical cation in a pyrimidine heterocyclic system. Further, 5-C and 6-C substituted (substituents are -F, -Cl, -NH(2), -N(CH(3))(2), -OCH(3), -CF(3), -CH(3), -CH(2)CH(3), n-propyl, phenyl, and benzyl) and 5,6-disubstituted 2-thiouracil systems have been characterized by DFT and found that the reaction (1 + 1(•+) → 2(•+)) is exergonic (1.12-13.63 kcal/mol) for many of them.
Collapse
Affiliation(s)
- K P Prasanthkumar
- School of Chemical Sciences, Mahatma Gandhi University, Kottayam 686560, India
| | | | | |
Collapse
|
31
|
Vernekar AA, Mugesh G. Hemin-Functionalized Reduced Graphene Oxide Nanosheets Reveal Peroxynitrite Reduction and Isomerization Activity. Chemistry 2012; 18:15122-32. [DOI: 10.1002/chem.201202272] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2012] [Indexed: 11/07/2022]
|
32
|
Bhabak KP, Bhowmick D. Synthesis and structural characterization of some trisulfide analoges of thiouracil-based antithyroid drugs. J Mol Struct 2012. [DOI: 10.1016/j.molstruc.2012.05.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
33
|
Vishwanatha TM, Narendra N, Chattopadhyay B, Mukherjee M, Sureshbabu VV. Synthesis of Selenoxo Peptides and Oligoselenoxo Peptides Employing LiAlHSeH. J Org Chem 2012; 77:2689-702. [DOI: 10.1021/jo2024703] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Affiliation(s)
- T. M. Vishwanatha
- Peptide Research Laboratory,
Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore
560001, India
| | - N. Narendra
- Peptide Research Laboratory,
Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore
560001, India
| | - Basab Chattopadhyay
- Department
of Solid State Physics, Indian Association for the Cultivation of Science,
Jadavpur, Kolkata 700032, India
| | - Monika Mukherjee
- Department
of Solid State Physics, Indian Association for the Cultivation of Science,
Jadavpur, Kolkata 700032, India
| | - Vommina V. Sureshbabu
- Peptide Research Laboratory,
Department of Studies in Chemistry, Central College Campus, Bangalore University, Dr. B. R. Ambedkar Veedhi, Bangalore
560001, India
| |
Collapse
|
34
|
Jiao A, Yang N, Wang J, Toure A, Xu X, Jin Z. Organotellurium-bridged cyclodextrin dimers as artificial glutathione peroxidase models. J INCL PHENOM MACRO 2012. [DOI: 10.1007/s10847-012-0120-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
|
35
|
Bhuyan BJ, Mugesh G. Antioxidant activity of peptide-based angiotensin converting enzyme inhibitors. Org Biomol Chem 2012; 10:2237-47. [PMID: 22307539 DOI: 10.1039/c2ob06533a] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Angiotensin converting enzyme (ACE) inhibitors are important for the treatment of hypertension as they can decrease the formation of vasopressor hormone angiotensin II (Ang II) and elevate the levels of vasodilating hormone bradykinin. It is observed that bradykinin contains a Ser-Pro-Phe motif near the site of hydrolysis. The selenium analogues of captopril represent a novel class of ACE inhibitors as they also exhibit significant antioxidant activity. In this study, several di- and tripeptides containing selenocysteine and cysteine residues at the N-terminal were synthesized. Hydrolysis of angiotensin I (Ang I) to Ang II by ACE was studied in the presence of these peptides. It is observed that the introduction of L-Phe to Sec-Pro and Cys-Pro peptides significantly increases the ACE inhibitory activity. On the other hand, the introduction of L-Val or L-Ala decreases the inhibitory potency of the parent compounds. The presence of an L-Pro moiety in captopril analogues appears to be important for ACE inhibition as the replacement of L-Pro by L-piperidine 2-carboxylic acid decreases the ACE inhibition. The synthetic peptides were also tested for their ability to scavenge peroxynitrite (PN) and to exhibit glutathione peroxidase (GPx)-like activity. All the selenium-containing peptides exhibited good PN-scavenging and GPx activities.
Collapse
Affiliation(s)
- Bhaskar J Bhuyan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | | |
Collapse
|
36
|
Kimani MM, Wang HC, Brumaghim JL. Investigating the copper coordination, electrochemistry, and Cu(ii) reduction kinetics of biologically relevant selone and thione compounds. Dalton Trans 2012; 41:5248-59. [DOI: 10.1039/c2dt11731b] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
|
37
|
Lamani DS, Bhowmick D, Mugesh G. Spirodiazaselenuranes: synthesis, structure and antioxidant activity. Org Biomol Chem 2012; 10:7933-43. [DOI: 10.1039/c2ob26156a] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
|
38
|
Kimani MM, VanDerveer D, Brumaghim JL. The diselanylbis(1,3-dimethyl-1H-imidazol-3-ium) dication stabilized by the polymericcatena-pentachloridotricuprate(I) anion. Acta Crystallogr C 2011; 67:m208-10. [DOI: 10.1107/s0108270111018117] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2011] [Accepted: 05/12/2011] [Indexed: 11/10/2022] Open
|
39
|
Satheeshkumar K, Mugesh G. Synthesis and Antioxidant Activity of Peptide-Based Ebselen Analogues. Chemistry 2011; 17:4849-57. [DOI: 10.1002/chem.201003417] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2011] [Indexed: 11/06/2022]
|
40
|
Kimani MM, Bayse CA, Brumaghim JL. Synthesis, characterization, and DFT studies of thione and selone Cu(I) complexes with variable coordination geometries. Dalton Trans 2011; 40:3711-23. [PMID: 21384035 DOI: 10.1039/c1dt10104h] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Coordination of Cu(I) halides with N,N'-dimethylimidazole selone (dmise) and thione (dmit) ligands was examined by treating CuX (X = Cl, Br, I) with one or two equivalents of dmise or dmit. The reaction of CuI and CuBr with one molar equivalent of dmise results in unusual selenium-bridged tetrameric Cu(4)(μ-dmise)(4)(μ-X)(2)X(2) copper complexes with average Cu-Se bond lengths of 2.42 Å and a Cu(2)(μ-X)(2) core (X = I (1) or Br (6)) that's in a rhomboidal structure. The reaction of CuX (X = Cl, Br, and I) with two equivalents of dmit or dmise results in trigonal planar Cu(I) complexes of two different conformations with the formula Cu(dmit)(2)X (3a, 3b, 4, and 7) or Cu(dmise)(2)X (2, 5, and 8) with average Cu-S and Cu-Se bond lengths of 2.23 Å and 2.34 Å, respectively. The coordination geometry around the copper center in complexes 1 to 8 is determined by the type of halide and chalcogenone ligand used, intramolecular π-π interactions, and short contact interactions between X-H (X = I, Br, Cl, Se or S). The theoretical DFT calculations are in good agreement with experimental X-ray structural data and indicate that dmise ligands are required for formation of the tetrameric complexes 1 and 6. Electrochemical studies show that the trigonal copper selone complexes have more negative potentials relative to analogous copper thione complexes by an average of 108 mV.
Collapse
Affiliation(s)
- Martin M Kimani
- Department of Chemistry, Clemson University, Clemson, SC 29634-0973, USA
| | | | | |
Collapse
|
41
|
Bhabak KP, Vernekar AA, Jakka SR, Roy G, Mugesh G. Mechanistic investigations on the efficient catalytic decomposition of peroxynitrite by ebselen analogues. Org Biomol Chem 2011; 9:5193-200. [DOI: 10.1039/c0ob01234c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
|
42
|
Bhuyan BJ, Mugesh G. Effect of peptide-based captopril analogues on angiotensin converting enzyme activity and peroxynitrite-mediated tyrosine nitration. Org Biomol Chem 2011; 9:5185-92. [DOI: 10.1039/c1ob05148b] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
|
43
|
Bhabak KP, Satheeshkumar K, Jayavelu S, Mugesh G. Inhibition of peroxynitrite- and peroxidase-mediated protein tyrosine nitration by imidazole-based thiourea and selenourea derivatives. Org Biomol Chem 2011; 9:7343-50. [DOI: 10.1039/c1ob05773a] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
|
44
|
Bhuyan BJ, Mugesh G. Synthesis, characterization and antioxidant activity of angiotensin converting enzyme inhibitors. Org Biomol Chem 2010; 9:1356-65. [PMID: 21186397 DOI: 10.1039/c0ob00823k] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Angiotensin converting enzyme (ACE) catalyzes the conversion of angiotensin I (Ang I) to angiotensin II (Ang II). ACE also cleaves the terminal dipeptide of vasodilating hormone bradykinin (a nonapeptide) to inactivate this hormone. Therefore, inhibition of ACE is generally used as one of the methods for the treatment of hypertension. 'Oxidative stress' is another disease state caused by an imbalance in the production of oxidants and antioxidants. A number of studies suggest that hypertension and oxidative stress are interdependent. Therefore, ACE inhibitors having antioxidant property are considered beneficial for the treatment of hypertension. As selenium compounds are known to exhibit better antioxidant behavior than their sulfur analogues, we have synthesized a number of selenium analogues of captopril, an ACE inhibitor used as an antihypertensive drug. The selenium analogues of captopril not only inhibit ACE activity but also effectively scavenge peroxynitrite, a strong oxidant found in vivo.
Collapse
Affiliation(s)
- Bhaskar J Bhuyan
- Department of Inorganic and Physical Chemistry, Indian Institute of Science, Bangalore 560 012, India
| | | |
Collapse
|
45
|
Bhabak KP, Mugesh G. Inhibition of peroxidase-catalyzed protein tyrosine nitration by antithyroid drugs and their analogues. Inorganica Chim Acta 2010. [DOI: 10.1016/j.ica.2010.03.048] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
46
|
Kimani MM, Brumaghim JL, VanDerveer D. Probing the Antioxidant Action of Selenium and Sulfur Using Cu(I)-Chalcogenone Tris(pyrazolyl)methane and -borate Complexes. Inorg Chem 2010; 49:9200-11. [DOI: 10.1021/ic100668b] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Martin M. Kimani
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634
| | - Julia L. Brumaghim
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634
| | - Don VanDerveer
- Department of Chemistry, Clemson University, Clemson, South Carolina 29634
| |
Collapse
|