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Modular total syntheses of trans-clerodanes and sesquiterpene (hydro)quinones via tail-to-head cyclization and reductive coupling strategies. Nat Commun 2022; 13:6633. [PMID: 36333313 PMCID: PMC9636166 DOI: 10.1038/s41467-022-34404-4] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2022] [Accepted: 10/24/2022] [Indexed: 11/06/2022] Open
Abstract
The trans-clerodanes and sesquiterpene (hydro)quinones are a growing class of natural products that exhibit a wide range of biological activities. Although they are different types of natural products, some of them feature the same trans-decalin core structure. Here, we report the total syntheses of two members of trans-clerodanes, five members of sesquiterpene (hydro)quinones as well as the proposed structure of dysidavarone D via a modular synthetic route. A bioinspired tail-to-head cyclization strategy was developed to syntheses of the trans-decalin architectures by using two diastereochemically complementary radical polyene cyclization reactions catalyzed by Ti(III) and mediated by Mn(III), respectively. The different types of side chains were introduced by challenging nickel catalyzed reductive couplings of sterically hindered alkyl halides. The synthesis of the proposed dysidavarone D proved a wrong structural assignment of the natural product.
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2
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Synthesis of thia-Michael-Type Adducts between Naphthoquinones and N-Acetyl-L-Cysteine and Their Biological Activity. Molecules 2022; 27:molecules27175645. [PMID: 36080409 PMCID: PMC9457610 DOI: 10.3390/molecules27175645] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 08/25/2022] [Accepted: 08/31/2022] [Indexed: 11/16/2022] Open
Abstract
A series of naphthoquinones, namely, 1,4-naphthoquinone, menadione, plumbagin, juglone, naphthazarin, and lawsone, were reacted with N-acetyl-L-cysteine, and except for lawsone, which did not react, the related adducts were obtained. After the tuning of the solvent and reaction conditions, the reaction products were isolated as almost pure from the complex reaction mixture via simple filtration and were fully characterized. Therefore, the aim of this work was to evaluate whether the antitumor activity of new compounds of 1,4-naphthoquinone derivatives leads to an increase in ROS in tumor cell lines of cervical carcinoma (HeLa), neuroblastoma (SH-SY5Y), and osteosarcoma (SaOS2, U2OS) and in normal dermal fibroblast (HDFa). The MTT assay was used to assay cell viability, the DCF-DA fluorescent probe to evaluate ROS induction, and cell-cycle analysis to measure the antiproliferative effect. Compounds 8, 9, and 12 showed a certain degree of cytotoxicity towards all the malignant cell lines tested, while compound 11 showed biological activity at higher IC50 values. Compounds 8 and 11 induced increases in ROS generation after 1 h of exposure, while after 48 h of treatment, only 8 induced an increase in ROS formation in HeLa cells. Cell-cycle analysis showed that compound 8 caused an increase in the number of G0/G1-phase cells in the HeLa experiment, while for the U2OS and SH-SY5Y cell lines, it led to an accumulation of S-phase cells. Therefore, these novel 1,4-naphthoquinone derivatives may be useful as antitumoral agents in the treatment of different cancers.
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Wang R, Hu Q, Wang H, Zhu G, Wang M, Zhang Q, Zhao Y, Li C, Zhang Y, Ge G, Chen H, Chen L. Identification of Vitamin K3 and its analogues as covalent inhibitors of SARS-CoV-2 3CL pro. Int J Biol Macromol 2021; 183:182-192. [PMID: 33901557 PMCID: PMC8064871 DOI: 10.1016/j.ijbiomac.2021.04.129] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2021] [Revised: 04/15/2021] [Accepted: 04/20/2021] [Indexed: 11/29/2022]
Abstract
After the emergence of the pandemic, repurposed drugs have been considered as a quicker way of finding potential antiviral agents. SARS-CoV-2 3CLpro is essential for processing the viral polyproteins into mature non-structural proteins, making it an attractive target for developing antiviral agents. Here we show that Vitamin K3 screened from the FDA-Approved Drug Library containing an array of 1,018 compounds has potent inhibitory activity against SARS-CoV-2 3CLpro with the IC50 value of 4.78 ± 1.03 μM, rather than Vitamin K1, K2 and K4. Next, the time-dependent inhibitory experiment was carried out to confirm that Vitamin K3 could form the covalent bond with SARS-CoV-2 3CLpro. Then we analyzed the structure-activity relationship of Vitamin K3 analogues and identified 5,8-dihydroxy-1,4-naphthoquinone with 9.8 times higher inhibitory activity than Vitamin K3. Further mass spectrometric analysis and molecular docking study verified the covalent binding between Vitamin K3 or 5,8-dihydroxy-1,4-naphthoquinone and SARS-CoV-2 3CLpro. Thus, our findings provide valuable information for further optimization and design of novel inhibitors based on Vitamin K3 and its analogues, which may have the potential to fight against SARS-CoV-2.
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Affiliation(s)
- Ruyu Wang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Qing Hu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Haonan Wang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Guanghao Zhu
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Mengge Wang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Qian Zhang
- Department of Medicinal Chemistry, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Yishu Zhao
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Chunyu Li
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Yani Zhang
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China
| | - Guangbo Ge
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Hongzhuan Chen
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
| | - Lili Chen
- Institute of Interdisciplinary Integrative Medicine Research, Shanghai University of Traditional Chinese Medicine, Shanghai 201203, China.
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Chong C, Zhang Q, Ke J, Zhang H, Yang X, Wang B, Ding W, Lu Z. Total Synthesis of Anti‐Cancer Meroterpenoids Dysideanone B and Dysiherbol A and Structural Reassignment of Dysiherbol A. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202100541] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Chuanke Chong
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
| | - Qunlong Zhang
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
| | - Jia Ke
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
| | - Haiming Zhang
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
| | - Xudong Yang
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
| | - Bingjian Wang
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
| | - Wei Ding
- Tianjin Key Laboratory of Human Development and Reproductive Regulation Tianjin Central Hospital of Gynecology Obstetrics Nankai University 156 Third Rd Tianjin 300052 China
| | - Zhaoyong Lu
- State Key Laboratory of Medicinal Chemical Biology College of Pharmacy Nankai University 38 Tongyan Rd Tianjin 300350 China
- State Key Laboratory of Natural Medicines China Pharmaceutical University 24 Tongjiaxiang Nanjing 210009 China
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5
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Chong C, Zhang Q, Ke J, Zhang H, Yang X, Wang B, Ding W, Lu Z. Total Synthesis of Anti-Cancer Meroterpenoids Dysideanone B and Dysiherbol A and Structural Reassignment of Dysiherbol A. Angew Chem Int Ed Engl 2021; 60:13807-13813. [PMID: 33847042 DOI: 10.1002/anie.202100541] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2021] [Revised: 03/30/2021] [Indexed: 01/01/2023]
Abstract
The first total synthesis of marine anti-cancer meroterpenoids dysideanone B and dysiherbol A have been accomplished in a divergent way. The synthetic route features: 1) a site and stereoselective α-position alkylation of a Wieland-Miescher ketone derivative with a bulky benzyl bromide to join the terpene and aromatic moieties together and set the stage for subsequent cyclization reactions; 2) an intramolecular radical cyclization to construct the 6/6/6/6-tetracycle of dysideanone B and an intramolecular Heck reaction to forge the 6/6/5/6-fused core structure of dysiherbol A. A late-stage introduction of the ethoxy group in dysideanone B reveals that this group might come from the solvent ethanol. The structure of dysiherbol A has been revised based on our chemical total synthesis.
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Affiliation(s)
- Chuanke Chong
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China
| | - Qunlong Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China
| | - Jia Ke
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China
| | - Haiming Zhang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China
| | - Xudong Yang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China
| | - Bingjian Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China
| | - Wei Ding
- Tianjin Key Laboratory of Human Development and Reproductive Regulation, Tianjin Central Hospital of Gynecology Obstetrics, Nankai University, 156 Third Rd, Tianjin, 300052, China
| | - Zhaoyong Lu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, Nankai University, 38 Tongyan Rd, Tianjin, 300350, China.,State Key Laboratory of Natural Medicines, China Pharmaceutical University, 24 Tongjiaxiang, Nanjing, 210009, China
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6
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Silva LR, Guimarães AS, do Nascimento J, do Santos Nascimento IJ, da Silva EB, McKerrow JH, Cardoso SH, da Silva-Júnior EF. Computer-aided design of 1,4-naphthoquinone-based inhibitors targeting cruzain and rhodesain cysteine proteases. Bioorg Med Chem 2021; 41:116213. [PMID: 33992862 DOI: 10.1016/j.bmc.2021.116213] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2021] [Revised: 04/23/2021] [Accepted: 05/05/2021] [Indexed: 12/26/2022]
Abstract
Chagas disease and Human African Trypanosomiasis (HAT) are caused by Trypanosoma cruzi and T. brucei parasites, respectively. Cruzain (CRZ) and Rhodesain (RhD) are cysteine proteases that share 70% of identity and play vital functions in these parasites. These macromolecules represent promising targets for designing new inhibitors. In this context, 26 CRZ and 5 RhD 3D-structures were evaluated by molecular redocking to identify the most accurate one to be utilized as a target. Posteriorly, a virtual screening of a library containing 120 small natural and nature-based compounds was performed on both of them. In total, 14 naphthoquinone-based analogs were identified, synthesized, and biologically evaluated. In total, five compounds were active against RhD, being three of them also active on CRZ. A derivative of 1,4-naphthoquinonepyridin-2-ylsulfonamide was found to be the most active molecule, exhibiting IC50 values of 6.3 and 1.8 µM for CRZ and RhD, respectively. Dynamic simulations at 100 ns demonstrated good stability and do not alter the targets' structures. MM-PBSA calculations revealed that it presents a higher affinity for RhD (-25.3 Kcal mol-1) than CRZ, in which van der Waals interactions were more relevant. A mechanistic hypothesis (via C3-Michael-addition reaction) involving a covalent mode of inhibition for this compound towards RhD was investigated by covalent molecular docking and DFT B3LYP/6-31 + G* calculations, exhibiting a low activation energy (ΔG‡) and providing a stable product (ΔG), with values of 7.78 and - 39.72 Kcal mol-1, respectively; similar to data found in the literature. Nevertheless, a reversibility assay by dilution revealed that JN-11 is a time-dependent and reversible inhibitor. Finally, this study applies modern computer-aided techniques to identify promising inhibitors from a well-known chemical class of natural products. Then, this work could inspire other future studies in the field, being useful for designing potent naphthoquinones as RhD inhibitors.
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Affiliation(s)
- Leandro Rocha Silva
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A.C. Simões, Lourival Melo Mota Avenue, Maceió 57072-970, Brazil; Laboratory of Organic and Medicinal Synthesis, Federal University of Alagoas, Campus Arapiraca, Manoel Severino Barbosa Avenue, Arapiraca 57309-005, Brazil
| | - Ari Souza Guimarães
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A.C. Simões, Lourival Melo Mota Avenue, Maceió 57072-970, Brazil; Laboratory of Organic and Medicinal Synthesis, Federal University of Alagoas, Campus Arapiraca, Manoel Severino Barbosa Avenue, Arapiraca 57309-005, Brazil
| | - Jadiely do Nascimento
- Laboratory of Organic and Medicinal Synthesis, Federal University of Alagoas, Campus Arapiraca, Manoel Severino Barbosa Avenue, Arapiraca 57309-005, Brazil
| | - Igor José do Santos Nascimento
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A.C. Simões, Lourival Melo Mota Avenue, Maceió 57072-970, Brazil
| | - Elany Barbosa da Silva
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - James H McKerrow
- Center for Discovery and Innovation in Parasitic Diseases, Skaggs School of Pharmacy and Pharmaceutical Sciences, University of California San Diego, La Jolla, CA, USA
| | - Sílvia Helena Cardoso
- Laboratory of Organic and Medicinal Synthesis, Federal University of Alagoas, Campus Arapiraca, Manoel Severino Barbosa Avenue, Arapiraca 57309-005, Brazil
| | - Edeildo Ferreira da Silva-Júnior
- Chemistry and Biotechnology Institute, Federal University of Alagoas, Campus A.C. Simões, Lourival Melo Mota Avenue, Maceió 57072-970, Brazil.
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Gurard-Levin ZA, Liu C, Jekle A, Jaisinghani R, Ren S, Vandyck K, Jochmans D, Leyssen P, Neyts J, Blatt LM, Beigelman L, Symons JA, Raboisson P, Scholle MD, Deval J. Evaluation of SARS-CoV-2 3C-like protease inhibitors using self-assembled monolayer desorption ionization mass spectrometry. Antiviral Res 2020; 182:104924. [PMID: 32896566 PMCID: PMC7834858 DOI: 10.1016/j.antiviral.2020.104924] [Citation(s) in RCA: 28] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2020] [Revised: 08/21/2020] [Accepted: 08/22/2020] [Indexed: 01/25/2023]
Abstract
Severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) is the cause of the COVID-19 pandemic that began in 2019. The coronavirus 3-chymotrypsin-like cysteine protease (3CLpro) controls replication and is therefore considered a major target for antiviral discovery. This study describes the evaluation of SARS-CoV-2 3CLpro inhibitors in a novel self-assembled monolayer desorption ionization mass spectrometry (SAMDI-MS) enzymatic assay. Compared with a traditional FRET readout, the label-free SAMDI-MS assay offers greater sensitivity and eliminates false positive inhibition from compound interference with the optical signal. The SAMDI-MS assay was optimized and validated with known inhibitors of coronavirus 3CLpro such as GC376 (IC50 = 0.060 μM), calpain inhibitors II and XII (IC50 ~20-25 μM). The FDA-approved drugs shikonin, disulfiram, and ebselen did not inhibit SARS-CoV-2 3CLpro activity in the SAMDI-MS assay under physiologically relevant reducing conditions. The three drugs did not directly inhibit human β-coronavirus OC-43 or SARS-CoV-2 in vitro, but instead induced cell death. In conclusion, the SAMDI-MS 3CLpro assay, combined with antiviral and cytotoxic assessment, provides a robust platform to evaluate antiviral agents directed against SARS-CoV-2.
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Affiliation(s)
| | - Cheng Liu
- Aligos Therapeutics, Inc, South San Francisco, USA
| | | | | | - Suping Ren
- Aligos Therapeutics, Inc, South San Francisco, USA
| | | | | | | | | | | | | | | | | | | | - Jerome Deval
- Aligos Therapeutics, Inc, South San Francisco, USA.
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Klein P, Barthels F, Johe P, Wagner A, Tenzer S, Distler U, Le TA, Schmid P, Engel V, Engels B, Hellmich UA, Opatz T, Schirmeister T. Naphthoquinones as Covalent Reversible Inhibitors of Cysteine Proteases-Studies on Inhibition Mechanism and Kinetics. Molecules 2020; 25:molecules25092064. [PMID: 32354191 PMCID: PMC7248907 DOI: 10.3390/molecules25092064] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 04/16/2020] [Accepted: 04/21/2020] [Indexed: 01/08/2023] Open
Abstract
The facile synthesis and detailed investigation of a class of highly potent protease inhibitors based on 1,4-naphthoquinones with a dipeptidic recognition motif (HN-l-Phe-l-Leu-OR) in the 2-position and an electron-withdrawing group (EWG) in the 3-position is presented. One of the compound representatives, namely the acid with EWG = CN and with R = H proved to be a highly potent rhodesain inhibitor with nanomolar affinity. The respective benzyl ester (R = Bn) was found to be hydrolyzed by the target enzyme itself yielding the free acid. Detailed kinetic and mass spectrometry studies revealed a reversible covalent binding mode. Theoretical calculations with different density functionals (DFT) as well as wavefunction-based approaches were performed to elucidate the mode of action.
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Affiliation(s)
- Philipp Klein
- Department of Chemistry, Organic Chemistry Section, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany;
| | - Fabian Barthels
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-Universität, Staudingerweg 5, 55128 Mainz, Germany; (F.B.); (P.J.)
| | - Patrick Johe
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-Universität, Staudingerweg 5, 55128 Mainz, Germany; (F.B.); (P.J.)
| | - Annika Wagner
- Department of Chemistry, Biochemistry Section, Johannes Gutenberg-Universität, Johann-Joachim Becherweg 30, 55128 Mainz, Germany; (A.W.); (U.A.H.)
| | - Stefan Tenzer
- Institute of Immunology, University Medical Center, Johannes Gutenberg-Universität Mainz, Langenbeckstr. 1, 55131 Mainz, Germany; (S.T.); (U.D.)
| | - Ute Distler
- Institute of Immunology, University Medical Center, Johannes Gutenberg-Universität Mainz, Langenbeckstr. 1, 55131 Mainz, Germany; (S.T.); (U.D.)
| | - Thien Anh Le
- Institute of Physical and Theoretical Chemistry, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany; (T.A.L.); (P.S.); (V.E.); (B.E.)
| | - Paul Schmid
- Institute of Physical and Theoretical Chemistry, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany; (T.A.L.); (P.S.); (V.E.); (B.E.)
| | - Volker Engel
- Institute of Physical and Theoretical Chemistry, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany; (T.A.L.); (P.S.); (V.E.); (B.E.)
| | - Bernd Engels
- Institute of Physical and Theoretical Chemistry, Universität Würzburg, Emil-Fischer-Straße 42, 97074 Würzburg, Germany; (T.A.L.); (P.S.); (V.E.); (B.E.)
| | - Ute A. Hellmich
- Department of Chemistry, Biochemistry Section, Johannes Gutenberg-Universität, Johann-Joachim Becherweg 30, 55128 Mainz, Germany; (A.W.); (U.A.H.)
- Centre for Biomolecular Magnetic Resonance (BMRZ), Goethe-University Frankfurt, 60323 Frankfurt, Germany
| | - Till Opatz
- Department of Chemistry, Organic Chemistry Section, Johannes Gutenberg-Universität, Duesbergweg 10-14, 55128 Mainz, Germany;
- Correspondence: (T.O.); (T.S.); Tel.: +49-(0)6131-39-22272 (T.O.); +49-(0)6131-39-25742 (T.S.)
| | - Tanja Schirmeister
- Institute of Pharmaceutical and Biomedical Sciences, Johannes Gutenberg-Universität, Staudingerweg 5, 55128 Mainz, Germany; (F.B.); (P.J.)
- Correspondence: (T.O.); (T.S.); Tel.: +49-(0)6131-39-22272 (T.O.); +49-(0)6131-39-25742 (T.S.)
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Menadione sodium bisulfite inhibits the toxic aggregation of amyloid-β(1–42). Biochim Biophys Acta Gen Subj 2018; 1862:2226-2235. [DOI: 10.1016/j.bbagen.2018.07.019] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2018] [Revised: 06/22/2018] [Accepted: 07/17/2018] [Indexed: 12/16/2022]
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Durán AG, Chinchilla N, Molinillo JM, Macías FA. Influence of lipophilicity in O-acyl and O-alkyl derivatives of juglone and lawsone: a structure-activity relationship study in the search for natural herbicide models. PEST MANAGEMENT SCIENCE 2018; 74:682-694. [PMID: 29024464 DOI: 10.1002/ps.4764] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 09/06/2017] [Accepted: 10/05/2017] [Indexed: 06/07/2023]
Abstract
BACKGROUND Naphthoquinones are known for their broad range of biological activities. Given the increasing demands of consumers in relation to food quality and growing concerns about the impact of synthetic herbicides, it is necessary to search for new agrochemicals. Natural products and allelopathy provide new alternatives for the development of pesticides with lower toxicity and greater environmental compatibility. RESULTS A structure-activity relationship to evaluate the effect of bioavailability was performed. A total of 44 O-acyl and O-alkyl derivatives of juglone and lawsone with different linear chain lengths were prepared. These compounds were tested on etiolated wheat coleoptiles, standard target species (STS) and four weeds, Echinochloa crus-galli L., Lolium rigidum Gaud., Lolium perenne L. and Avena fatua L. The results showed a strong influence of lipophilicity and, in most cases, the data fitted a logP-dependent quadratic mathematical model. CONCLUSION The effects produced were mostly stunting and necrosis caused by growth inhibition. The potential structure and activity behaviour is described. © 2017 Society of Chemical Industry.
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Affiliation(s)
- Alexandra G Durán
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
| | - Nuria Chinchilla
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
| | - José Mg Molinillo
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
| | - Francisco A Macías
- Allelopathy Group, Department of Organic Chemistry, Institute of Biomolecules (INBIO), University of Cadiz, Cádiz, Spain
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Ogata T, Yoshida T, Shimizu M, Tanaka M, Fukuhara C, Ishii J, Nishiuchi A, Inamoto K, Kimachi T. Unusual, chemoselective etherification of 2-hydroxy-1,4-naphthoquinone derivatives utilizing alkoxymethyl chlorides: scope, mechanism and application to the synthesis of biologically active natural product (±)-lantalucratin C. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.01.040] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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de Moraes TAP, Filha MJS, Camara CA, Silva TMS, Soares BM, Bomfim IS, Pessoa C, Ximenes GC, Silva Junior VA. Synthesis and cytotoxic evaluation of a series of 2-amino-naphthoquinones against human cancer cells. Molecules 2014; 19:13188-99. [PMID: 25162959 PMCID: PMC6271085 DOI: 10.3390/molecules190913188] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2014] [Revised: 08/22/2014] [Accepted: 08/22/2014] [Indexed: 11/16/2022] Open
Abstract
The cytotoxicity of a series of aminonaphthoquinones resulting from the reaction of suitable aminoacids with 1,4-naphthoquinone was assayed against SF-295 (glioblastoma), MDAMB-435 (breast), HCT-8 (colon), HCT-116 (colon), HL-60 (leukemia), OVCAR-8 (ovarian), NCI-H358M (bronchoalveolar lung carcinoma) and PC3-M (prostate) cancer cells and also against PBMC (peripheral blood mononuclear cells). The results demonstrated that all the synthetic aminonaphthoquinones had relevant cytotoxic activity against all human cancer lines used in this experiment. Five of the compounds showed high cytotoxicity and selectivity against all cancer cell lines tested (IC50 = 0.49 to 3.89 µg·mL−1). The title compounds were less toxic to PBMC, since IC50 was 1.5 to eighteen times higher (IC50 = 5.51 to 17.61 µg·mL−1) than values shown by tumour cell lines. The mechanism of cell growth inhibition and structure–activity relationships remains as a target for future investigations.
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Affiliation(s)
- Thiago A P de Moraes
- Departamento de Morfologia e Fisiologia Animal-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
| | - Maria J S Filha
- Departamento de Ciencias Moleculares-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
| | - Celso A Camara
- Departamento de Ciencias Moleculares-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
| | - Tania M S Silva
- Departamento de Ciencias Moleculares-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de Medeiros, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
| | - Bruno M Soares
- Departamento de Farmacologia e Fisiologia, Universidade Federal do Ceará-UFC, Rua Coronel Nunes de Melo, 1127, Rodolfo Teófilo, CP 3157, Fortaleza, Ceará CE 60430-270, Brazil.
| | - Igor S Bomfim
- Departamento de Farmacologia e Fisiologia, Universidade Federal do Ceará-UFC, Rua Coronel Nunes de Melo, 1127, Rodolfo Teófilo, CP 3157, Fortaleza, Ceará CE 60430-270, Brazil.
| | - Claudia Pessoa
- Departamento de Morfologia e Fisiologia Animal-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
| | - George C Ximenes
- Departamento de Morfologia e Fisiologia Animal-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
| | - Valdemiro A Silva Junior
- Departamento de Morfologia e Fisiologia Animal-UFRPE, Universidade Federal Rural de Pernambuco-UFRPE, Rua Dom Manoel de, s/n, Dois Irmãos, Recife, Pernambuco PE 52171-900, Brazil.
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13
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Curpăn R, Avram S, Vianello R, Bologa C. Exploring the biological promiscuity of high-throughput screening hits through DFT calculations. Bioorg Med Chem 2014; 22:2461-8. [PMID: 24656802 DOI: 10.1016/j.bmc.2014.02.055] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 02/20/2014] [Accepted: 02/28/2014] [Indexed: 11/28/2022]
Abstract
The goal of this study is the understanding of biologically promiscuous compounds (frequent hitters) in HTS outcomes through their chemical behavior estimated via reactivity descriptors. Chemical reactivity is often an undesirable property due to the lack in biological selectivity of compounds comprised in HTS libraries. In this study the reactivity indexes have been computed within the DFT formalism, at different levels of theory, for two classes of representative compounds compiled from PubChem database, one comprising frequent hitters and the second one comprising rare hitters (biologically more selective compounds). We found that frequent hitters exert increased reactivity, mainly due to their electrophilic character, compared to the more selective class of compounds.
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Affiliation(s)
- Ramona Curpăn
- Department of Computational Chemistry, Institute of Chemistry Timisoara of Romanian Academy, 24 Mihai Viteazul, Timisoara 300223, Romania.
| | - Sorin Avram
- Department of Computational Chemistry, Institute of Chemistry Timisoara of Romanian Academy, 24 Mihai Viteazul, Timisoara 300223, Romania
| | - Robert Vianello
- Quantum Organic Chemistry Group, Ruđer Bošković Institute, Bijenička cesta 54, Zagreb HR-10000, Croatia
| | - Cristian Bologa
- Department of Internal Medicine, University of New Mexico Health Sciences Center, Albuquerque, NM 87131, USA
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14
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Patil P, Nimonkar A, Akamanchi KG. Aryl-Free Radical-Mediated Oxidative Arylation of Naphthoquinones Using o-Iodoxybenzoic Acid and Phenylhydrazines and Its Application toward the Synthesis of Benzocarbazoledione. J Org Chem 2014; 79:2331-6. [DOI: 10.1021/jo500131h] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Pravin Patil
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Abhay Nimonkar
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
| | - Krishnacharya G. Akamanchi
- Department of Pharmaceutical
Sciences and Technology, Institute of Chemical Technology, Matunga, Mumbai 400019, India
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15
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Novel quercetin derivatives in treatment of peroxynitrite-oxidized SERCA1. Mol Cell Biochem 2013; 386:1-14. [PMID: 24141791 DOI: 10.1007/s11010-013-1839-8] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2013] [Accepted: 09/26/2013] [Indexed: 12/20/2022]
Abstract
Sarco/endoplasmic reticulum calcium ATP-ase (SERCA) is regulated by low concentrations of peroxynitrite and inhibited by high levels, as indicated in human diseases. We studied quercetin (Q) and its novel derivatives monochloropivaloylquercetin (MPQ) and chloronaphthoquinonequercetin (CHQ) as agents with expected preventive properties against peroxynitrite-induced SERCA impairment. Q and MPQ protected the SERCA1 against peroxynitrite induced activity decrease, while CHQ potentiated the inhibitory effect of peroxynitrite. Quercetin derivatives were found to be weaker antioxidants compared with Q, as indicated by their ability to scavenge peroxynitrite and prevent of SERCA1 carbonylation, both decreasing in the order (Q > MPQ > CHQ). Quantum-chemical values of theoretical parameter E HOMO also indicated lower antioxidant capacities for MPQ and CHQ. Prooxidant properties estimated by calculations of frontier molecular orbitals (E LUMO) correlated with experimentally determined SH-group decrease induced by the compounds studied. Both methods showed a decrease of prooxidant properties as follows: CHQ > MPQ > Q. In addition, experimentally measured half-wave potentials indicated stronger prooxidant properties of quercetin derivatives as compared to Q. More expressive alterations of conformation in the transmembrane region of SERCA1 induced by quercetin derivatives, as compared with Q, may at least partially correlate with their higher lipophilicities. The protective effects of Q and MPQ on different isoforms of SERCA activity may be useful in prevention and treatment of inflammation or muscle diseases. The inhibitory effect of CHQ on SERCA isoforms may be beneficial in therapeutic approaches aimed at anti-tumor treatment.
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16
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Josey BJ, Inks ES, Wen X, Chou CJ. Structure-activity relationship study of vitamin k derivatives yields highly potent neuroprotective agents. J Med Chem 2013; 56:1007-22. [PMID: 23327468 DOI: 10.1021/jm301485d] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Historically known for its role in blood coagulation and bone formation, vitamin K (VK) has begun to emerge as an important nutrient for brain function. While VK involvement in the brain has not been fully explored, it is well-known that oxidative stress plays a critical role in neurodegenerative diseases. It was recently reported that VK protects neurons and oligodendrocytes from oxidative injury and rescues Drosophila from mitochondrial defects associated with Parkinson's disease. In this study, we take a chemical approach to define the optimal and minimum pharmacophore responsible for the neuroprotective effects of VK. In doing so, we have developed a series of potent VK analogues with favorable drug characteristics that provide full protection at nanomolar concentrations in a well-defined model of neuronal oxidative stress. Additionally, we have characterized key cellular responses and biomarkers consistent with the compounds' ability to rescue cells from oxidative stress induced cell death.
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Affiliation(s)
- Benjamin J Josey
- Department of Drug Discovery and Biomedical Sciences, South Carolina College of Pharmacy, Medical University of South Carolina, Charleston, South Carolina 29425, USA
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17
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Huang HM, Li YJ, Dai YP, Yu WB, Ye Q, Gao JR. Bifunctionalisation of 1,4-naphthoquinone by the Oxidative Addition of an Alkylamine and Iodine. JOURNAL OF CHEMICAL RESEARCH 2013. [DOI: 10.3184/174751912x13547276507240] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Novel 2-iodo-3-(alkylamino) naphthalene-1,4-diones are formed in 33–70% yield by the reaction of alkylamine and 1, 4-naphthoquinone in the presence of iodine.
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Affiliation(s)
- Huan-Ming Huang
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Yu-Jin Li
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Yin-Ping Dai
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Wu-Bin Yu
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Qin Ye
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
| | - Jian-Rong Gao
- State Key Laboratory Breeding Base of Green Chemistry-Synthesis Technology, Zhejiang University of Technology, Hangzhou 310032, P. R. China
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18
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Adarsh N, Shanmugasundaram M, Avirah RR, Ramaiah D. Aza-BODIPY Derivatives: Enhanced Quantum Yields of Triplet Excited States and the Generation of Singlet Oxygen and their Role as Facile Sustainable Photooxygenation Catalysts. Chemistry 2012; 18:12655-62. [DOI: 10.1002/chem.201202438] [Citation(s) in RCA: 139] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Indexed: 01/05/2023]
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19
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Mora-Pale M, Kwon SJ, Linhardt RJ, Dordick JS. Trimer hydroxylated quinone derived from apocynin targets cysteine residues of p47phox preventing the activation of human vascular NADPH oxidase. Free Radic Biol Med 2012; 52:962-9. [PMID: 22240153 PMCID: PMC3278529 DOI: 10.1016/j.freeradbiomed.2011.12.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2011] [Revised: 12/14/2011] [Accepted: 12/16/2011] [Indexed: 01/09/2023]
Abstract
Enzymatically derived oligophenols from apocynin can be effective inhibitors of human vascular NADPH oxidase (Nox). An isolated trimer hydroxylated quinone (IIIHyQ) has been shown to inhibit endothelial NADPH oxidase with an IC(50) ~30 nM. In vitro studies demonstrated that IIIHyQ is capable of disrupting the interaction between p47(phox) and p22(phox), thereby blocking the activation of the Nox2 isoform. Herein, we report the role of key cysteine residues in p47(phox) as targets for the IIIHyQ. Incubation of p47(phox) with IIIHyQ results in a decrease of ~80% of the protein free cysteine residues; similar results were observed using 1,2- and 1,4-naphthoquinones, whereas apocynin was unreactive. Mutants of p47(phox), in which each Cys was individually replaced by Ala (at residues 111, 196, and 378) or Gly (at residue 98), were generated to evaluate their individual importance in IIIHyQ-mediated inhibition of p47(phox) interaction with p22(phox). Specific Michael addition on Cys196, within the N-SH3 domain, by the IIIHyQ is critical for disrupting the p47(phox)-p22(phox) interaction. When a C196A mutation was tested, the IIIHyQ was unable to disrupt the p47(phox)-p22(phox) interaction. However, the IIIHyQ was effective at disrupting this interaction with the other mutants, displaying IC(50) values (4.9, 21.0, and 2.3μM for the C111A, C378A, and C98G mutants, respectively) comparable to that of wild-type p47(phox).
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Affiliation(s)
- Mauricio Mora-Pale
- Department of Chemical and Biological Engineering, Rensselaer Polytechnic Institute, Center for Biotechnology and Interdisciplinary Studies, Troy, NY 12180, USA
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20
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Design, synthesis and biological evaluation of peptidyl-vinylaminophosphonates as novel cysteine protease inhibitors. Bioorg Med Chem 2011; 19:7129-35. [DOI: 10.1016/j.bmc.2011.09.058] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2011] [Revised: 09/28/2011] [Accepted: 09/29/2011] [Indexed: 11/20/2022]
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21
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Dulyaninova NG, Hite KM, Zencheck WD, Scudiero DA, Almo SC, Shoemaker RH, Bresnick AR. Cysteine 81 is critical for the interaction of S100A4 and myosin-IIA. Biochemistry 2011; 50:7218-27. [PMID: 21749055 DOI: 10.1021/bi200853y] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Overexpression of S100A4, a member of the S100 family of Ca(2+)-binding proteins, is associated with a number of human pathologies, including fibrosis, inflammatory disorders, and metastatic disease. The identification of small molecules that disrupt S100A4/target interactions provides a mechanism for inhibiting S100A4-mediated cellular activities and their associated pathologies. Using an anisotropy assay that monitors the Ca(2+)-dependent binding of myosin-IIA to S100A4, NSC 95397 was identified as an inhibitor that disrupts the S100A4/myosin-IIA interaction and inhibits S100A4-mediated depolymerization of myosin-IIA filaments. Mass spectrometry demonstrated that NSC 95397 forms covalent adducts with Cys81 and Cys86, which are located in the canonical target binding cleft. Mutagenesis studies showed that covalent modification of just Cys81 is sufficient to inhibit S100A4 function with respect to myosin-IIA binding and depolymerization. Remarkably, substitution of Cys81 with serine or alanine significantly impaired the ability of S100A4 to promote myosin-IIA filament disassembly. As reversible covalent cysteine modifications have been observed for several S100 proteins, we propose that modification of Cys81 may provide an additional regulatory mechanism for mediating the binding of S100A4 to myosin-IIA.
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Affiliation(s)
- Natalya G Dulyaninova
- Department of Biochemistry, Albert Einstein College of Medicine, 1300 Morris Park Avenue, Bronx, New York 10461, USA
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22
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Villemin D, Benabdallah M, Rahmoun N, Jouannic C, Choukchou-Braham N, Mostefa-Kara B. A Green Route for Synthesis of New 1,2-Naphthoquinomethane Acetonitriles in Water. SYNTHETIC COMMUN 2010. [DOI: 10.1080/00397910903457340] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
| | - Mohammed Benabdallah
- a ENSICAEN, UCBN, LCMT-UMR 6507 CNRS , Caen, France
- b Département de Chimie, Laboratoire de Catalyse et Synthèse en Chimie Organique , Université de Tlemcen , Tlemcen, Algéria
| | - Nadjib Rahmoun
- b Département de Chimie, Laboratoire de Catalyse et Synthèse en Chimie Organique , Université de Tlemcen , Tlemcen, Algéria
| | | | - Noureddine Choukchou-Braham
- b Département de Chimie, Laboratoire de Catalyse et Synthèse en Chimie Organique , Université de Tlemcen , Tlemcen, Algéria
| | - Bachir Mostefa-Kara
- b Département de Chimie, Laboratoire de Catalyse et Synthèse en Chimie Organique , Université de Tlemcen , Tlemcen, Algéria
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23
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Reaction of dihydrolipoic acid with juglone and related naphthoquinones: unmasking of a spirocyclic 1,3-dithiane intermediate en route to naphtho[1,4]dithiepines. Tetrahedron 2010. [DOI: 10.1016/j.tet.2010.03.103] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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24
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Campiglia P, Aquino C, Bertamino A, De Simone N, Sala M, Castellano S, Santoriello M, Grieco P, Novellino E, Gomez-Monterrey IM. Unprecedented synthesis of a novel amino quinone ring system via oxidative decarboxylation of quinone-based α,α-amino esters. Org Biomol Chem 2010; 8:622-7. [DOI: 10.1039/b918898c] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Mulchande J, Oliveira R, Carrasco M, Gouveia L, Guedes RC, Iley J, Moreira R. 4-Oxo-β-lactams (Azetidine-2,4-diones) Are Potent and Selective Inhibitors of Human Leukocyte Elastase. J Med Chem 2009; 53:241-53. [DOI: 10.1021/jm901082k] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Jalmira Mulchande
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Rudi Oliveira
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Marta Carrasco
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Luís Gouveia
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Rita C. Guedes
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
| | - Jim Iley
- Department of Chemistry and Analytical Sciences, The Open University, Milton Keynes, MK7 6AA, U.K
| | - Rui Moreira
- iMed.UL, Faculty of Pharmacy, University of Lisbon, Av. Prof. Gama Pinto, 1649-003 Lisbon, Portugal
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26
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Park Y, Kong JY, Cho H. A furanquinone fromPaulownia tomentosastem for a new cathepsin K inhibitor. Phytother Res 2009; 23:1485-8. [DOI: 10.1002/ptr.2716] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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27
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Santos DM, Santos MM, Viana RJ, Castro RE, Moreira R, Rodrigues CM. Naphtho[2,3-d]isoxazole-4,9-dione-3-carboxylates: Potent, non-cytotoxic, antiapoptotic agents. Chem Biol Interact 2009; 180:175-82. [DOI: 10.1016/j.cbi.2009.03.007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2008] [Revised: 03/07/2009] [Accepted: 03/13/2009] [Indexed: 11/15/2022]
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28
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Wu X, Gorden AEV. 2-Quinoxalinol Salen Copper Complexes for Oxidation of Aryl Methylenes. European J Org Chem 2009. [DOI: 10.1002/ejoc.200800928] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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29
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Lai TS, Liu Y, Tucker T, Daniel KR, Sane DC, Toone E, Burke JR, Strittmatter WJ, Greenberg CS. Identification of chemical inhibitors to human tissue transglutaminase by screening existing drug libraries. ACTA ACUST UNITED AC 2008; 15:969-78. [PMID: 18804034 DOI: 10.1016/j.chembiol.2008.07.015] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2007] [Revised: 07/16/2008] [Accepted: 07/23/2008] [Indexed: 12/20/2022]
Abstract
Human tissue transglutaminase (TGM2) is a calcium-dependent crosslinking enzyme involved in the posttranslational modification of intra- and extracellular proteins and implicated in several neurodegenerative diseases. To find specific inhibitors to TGM2, two structurally diverse chemical libraries (LOPAC and Prestwick) were screened. We found that ZM39923, a Janus kinase inhibitor, and its metabolite ZM449829 were the most potent inhibitors with IC(50) of 10 and 5 nM, respectively. In addition, two other inhibitors, including tyrphostin 47 and vitamin K(3), were found to have an IC(50) in the micromolar range. These agents used in part a thiol-dependent mechanism to inhibit TGM2, consistent with the activation of TGM2 by reduction of an intramolecular disulfide bond. These inhibitors were tested in a polyglutamine-expressing Drosophila model of neurodegeneration and found to improve survival. The TGM2 inhibitors we discovered may serve as valuable lead compounds for the development of orally active TGM2 inhibitors to treat human diseases.
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Affiliation(s)
- Thung-S Lai
- Department of Medicine, Duke University Medical Center, Durham, NC 27710, USA.
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30
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Catti F, Kiuru PS, Slawin AMZ, Westwood NJ. The synthesis of highly functionalised pyridines using Ghosez-type reactions of dihydropyrazoles. Tetrahedron 2008; 64:9561-9566. [PMID: 19794812 DOI: 10.1016/j.tet.2008.07.063] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The aza-Diels-Alder reaction of αβ-unsaturated hydrazones is a general methodology that has been applied both to the synthesis of natural products and in the development of multicomponent reactions. Trends have emerged as to the effect of substituents on the efficiency of this reaction with substituents at the C2 and C4-positions of the aza-diene in general suppressing the reaction. Here we report that 4,5-dihydropyrazoles can function as substrates in this process despite the presence of substituents at both of these positions. A one pot, four chemical step sequence carried out under standard thermal or microwave conditions results in the formation of the corresponding pyridine-containing compounds. The scope of the reaction is explored and additional insights into the proposed mechanism of this reaction are provided.
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Affiliation(s)
- Federica Catti
- School of Chemistry and Centre for Biomolecular Sciences, University of St Andrews, North Haugh, St Andrews, KY16 9ST, UK
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31
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Ghasemi S, Mousavi MF, Shamsipur M. Enhancement of electron transfer kinetics on a polyaniline-modified electrode in the presence of anionic dopants. J Solid State Electrochem 2007. [DOI: 10.1007/s10008-007-0386-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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