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Porey A, Fremin SO, Nand S, Trevino R, Hughes WB, Dhakal SK, Nguyen VD, Greco SG, Arman HD, Larionov OV. Multimodal Acridine Photocatalysis Enables Direct Access to Thiols from Carboxylic Acids and Elemental Sulfur. ACS Catal 2024; 14:6973-6980. [PMID: 38737399 PMCID: PMC11081195 DOI: 10.1021/acscatal.4c01289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/14/2024]
Abstract
Development of photocatalytic systems that facilitate mechanistically divergent steps in complex catalytic manifolds by distinct activation modes can enable previously inaccessible synthetic transformations. However, multimodal photocatalytic systems remain understudied, impeding their implementation in catalytic methodology. We report herein a photocatalytic access to thiols that directly merges the structural diversity of carboxylic acids with the ready availability of elemental sulfur without substrate preactivation. The photocatalytic transformation provides a direct radical-mediated segue to one of the most biologically important and synthetically versatile organosulfur functionalities, whose synthetic accessibility remains largely dominated by two-electron-mediated processes based on toxic and uneconomical reagents and precursors. The two-phase radical process is facilitated by a multimodal catalytic reactivity of acridine photocatalysis that enables both the singlet excited state PCET-mediated decarboxylative carbon-sulfur bond formation and the previously unknown radical reductive disulfur bond cleavage by a photoinduced HAT process in the silane-triplet acridine system. The study points to a significant potential of multimodal photocatalytic systems in providing unexplored directions to previously inaccessible transformations.
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Affiliation(s)
- Arka Porey
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Seth O Fremin
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Sachchida Nand
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Ramon Trevino
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - William B Hughes
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Shree Krishna Dhakal
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Viet D Nguyen
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Samuel G Greco
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Hadi D Arman
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
| | - Oleg V Larionov
- Department of Chemistry, The University of Texas at San Antonio, San Antonio, Texas 78249, United States
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Inhibition of Cysteine Proteases by 6,6'-Dihydroxythiobinupharidine (DTBN) from Nuphar lutea. Molecules 2021; 26:molecules26164743. [PMID: 34443335 PMCID: PMC8399019 DOI: 10.3390/molecules26164743] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Revised: 08/01/2021] [Accepted: 08/03/2021] [Indexed: 11/21/2022] Open
Abstract
The specificity of inhibition by 6,6′-dihydroxythiobinupharidine (DTBN) on cysteine proteases was demonstrated in this work. There were differences in the extent of inhibition, reflecting active site structural-steric and biochemical differences. Cathepsin S (IC50 = 3.2 μM) was most sensitive to inhibition by DTBN compared to Cathepsin B, L and papain (IC50 = 1359.4, 13.2 and 70.4 μM respectively). DTBN is inactive for the inhibition of Mpro of SARS-CoV-2. Docking simulations suggested a mechanism of interaction that was further supported by the biochemical results. In the docking results, it was shown that the cysteine sulphur of Cathepsin S, L and B was in close proximity to the DTBN thiaspirane ring, potentially forming the necessary conditions for a nucleophilic attack to form a disulfide bond. Covalent docking and molecular dynamic simulations were performed to validate disulfide bond formation and to determine the stability of Cathepsins-DTBN complexes, respectively. The lack of reactivity of DTBN against SARS-CoV-2 Mpro was attributed to a mismatch of the binding conformation of DTBN to the catalytic binding site of Mpro. Thus, gradations in reactivity among the tested Cathepsins may be conducive for a mechanism-based search for derivatives of nupharidine against COVID-19. This could be an alternative strategy to the large-scale screening of electrophilic inhibitors.
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Rodrigues L, Tilve SG, Majik MS. Synthetic access to thiolane-based therapeutics and biological activity studies. Eur J Med Chem 2021; 224:113659. [PMID: 34237621 DOI: 10.1016/j.ejmech.2021.113659] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 06/15/2021] [Accepted: 06/16/2021] [Indexed: 12/26/2022]
Abstract
Secondary metabolites isolated from bioactive extracts of natural sources iteratively pioneer the research in drug discovery. Modern medicine is often inspired by bioactive natural products or the bio-functional motifs embedded in them. One of such consequential bio-functional motifs is the thiolane unit. Thiolane-based bioactive organic compounds have manifested a plethora of astonishing biological activities such as anti-viral, anti-cancer, anti-platelet, α-glucosidase inhibition, anti-HIV, immunosuppressive and anti-microbial activities which renders them excellent candidates in drug discovery. Hence, to scale up the accessibility of thiolane-based therapeutics its chemical syntheses is essential and in addition; a sneak peek in its biosynthesis would give a perspective for developing biomimetic syntheses. This review highlights the development of important thiolane-based therapeutics such as (i) Nuphar sesquiterpene thioalkaloids (ii) Thiosugar sulphonium salts from Salacia sp. (iii) Albomycins (iv) Thiolane-based therapeutics from Allium sp. (v) 4'-thionucleosides summarizing various synthetic strategies, biosynthesis and biological activity studies, covering literature till 2021. We anticipate that this review will inspire chemists and biochemists to take up the challenges encountered in the synthesis and development of thiolane-based therapeutics.
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Affiliation(s)
- Lima Rodrigues
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa, 403 206, India
| | - Santosh G Tilve
- School of Chemical Sciences, Goa University, Taleigao Plateau, Goa, 403 206, India
| | - Mahesh S Majik
- Department of Chemistry, Government College of Arts, Science and Commerce, Khandola Marcela, Goa, 403 107, India; Directorate of Higher Education, Porvorim, Goa 403 521, India.
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Waidha K, Anto NP, Jayaram DR, Golan-Goldhirsh A, Rajendran S, Livneh E, Gopas J. 6,6'-Dihydroxythiobinupharidine (DTBN) Purified from Nuphar lutea Leaves Is an Inhibitor of Protein Kinase C Catalytic Activity. Molecules 2021; 26:molecules26092785. [PMID: 34066895 PMCID: PMC8125885 DOI: 10.3390/molecules26092785] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2021] [Revised: 05/02/2021] [Accepted: 05/05/2021] [Indexed: 12/28/2022] Open
Abstract
Water lily (Nuphar) bioactive extracts have been widely used in traditional medicine owing to their multiple applications against human ailments. Phyto-active Nuphar extracts and their purified and synthetic derivatives have attracted the attention of ethnobotanists and biochemists. Here, we report that 6,6'-dihydroxythiobinupharidine (DTBN), purified from extracts of Nuphar lutea (L.) Sm. leaves, is an effective inhibitor of the kinase activity of members of the protein kinase C (PKC) family using in vitro and in silico approaches. We demonstrate that members of the conventional subfamily of PKCs, PKCα and PKCγ, were more sensitive to DTBN inhibition as compared to novel or atypical PKCs. Molecular docking analysis demonstrated the interaction of DTBN, with the kinase domain of PKCs depicting the best affinity towards conventional PKCs, in accordance with our in vitro kinase activity data. The current study reveals novel targets for DTBN activity, functioning as an inhibitor for PKCs kinase activity. Thus, this and other data indicate that DTBN modulates key cellular signal transduction pathways relevant to disease biology, including cancer.
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Affiliation(s)
- Kamran Waidha
- Defence Institute of High Altitude Research (DIHAR), Defence Research and Development Organisation (DRDO) Leh, Ladakh UT-194101, India;
| | - Nikhil Ponnoor Anto
- The Shraga Segal Department of Microbiology, Immunology and Genetics Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8400501, Israel; (N.P.A.); (D.R.J.)
| | - Divya Ram Jayaram
- The Shraga Segal Department of Microbiology, Immunology and Genetics Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8400501, Israel; (N.P.A.); (D.R.J.)
| | - Avi Golan-Goldhirsh
- The Jacob Blaustein Institutes for Desert Research (BIDR), Sede Boqer Campus, French Associates Institute for Agriculture and Biotechnology of Drylands, Ben-Gurion University of the Negev, Beer Sheva 8499000, Israel
- Correspondence: (A.G.-G.); (S.R.); (E.L.); (J.G.)
| | - Saravanakumar Rajendran
- Chemistry Division, Vellore Institute of Technology Chennai Campus, School of Advanced Sciences, Chennai 600127, India
- Correspondence: (A.G.-G.); (S.R.); (E.L.); (J.G.)
| | - Etta Livneh
- The Shraga Segal Department of Microbiology, Immunology and Genetics Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8400501, Israel; (N.P.A.); (D.R.J.)
- Correspondence: (A.G.-G.); (S.R.); (E.L.); (J.G.)
| | - Jacob Gopas
- The Shraga Segal Department of Microbiology, Immunology and Genetics Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer Sheva 8400501, Israel; (N.P.A.); (D.R.J.)
- Department of Oncology, Soroka University Medical Center, Beer Sheva 8400501, Israel
- Correspondence: (A.G.-G.); (S.R.); (E.L.); (J.G.)
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Nandakumar N, Gopinath P, Gopas J, Muraleedharan KM. Benzisothiazolone Derivatives Exhibit Cytotoxicity in Hodgkin's Lymphoma Cells through NF-κB Inhibition and are Synergistic with Doxorubicin and Etoposide. Anticancer Agents Med Chem 2021; 20:715-723. [PMID: 32053083 DOI: 10.2174/1871520620666200213103513] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 12/01/2019] [Accepted: 01/12/2020] [Indexed: 12/15/2022]
Abstract
BACKGROUND The authors investigated the NF-κB inhibitory role of three Benzisothiazolone (BIT) derivatives (1, 2 and 3) in Hodgkin's Lymphoma cells (L428) which constitutively express activated NF-κB. All three compounds showed dose-dependent NF-κB inhibition (78.3, 70.7 and 34.6%) in the luciferase reporter gene assay and were found cytotoxic at IC50 values of 3.3μg/ml, 4.35μg/ml and 13.8μg/ml, respectively by the XTT assay. BIT 1and BIT 2 (but not BIT 3) suppressed both NF-κB subunits p50 and p65 in cytoplasmic and nuclear extracts in a concentration-dependent manner. Furthermore, BIT 1 showed a moderate synergistic effect with the standard chemotherapy drugs etoposide and doxorubicin, whereas BIT 2 and 3 showed a moderate additive effect to antagonistic effect. Cisplatin exhibited an antagonist effect on all the compounds tested under various concentrations, except in the case of 1.56μg/ml of BIT 3 with 0.156μg/ml of cisplatin. The compounds also inhibited the migration of adherent human lung adenocarcinoma cells (A549) in vitro. We conclude that especially BIT 1 and BIT 2 have in vitro anti-inflammatory and anti-cancer activities, which can be further investigated for future potential therapeutic use. METHODS Inspired by the electrophilic sulfur in Nuphar alkaloids, monomeric and dimeric benzisothiazolones were synthesized from dithiodibenzoic acid and their NF-κB inhibitory role was explored. NF-κB inhibition and cytotoxicity of the synthesized derivatives were studied using luciferase reporter gene assay and XTTassay. Immunocytochemistry studies were performed using L428 cells. Cell migration assay was conducted using the A549 cell line. L428 cells were used to conduct combination studies and the results were plotted using CompuSyn software. RESULTS Benzisothiazolone derivatives exhibited cytotoxicity in Hodgkin's Lymphoma cells through NF-κB inhibition. Potent compounds showed suppression of both NF-κB subunits p50 and p65 in a concentrationdependent manner, both in cytoplasmic and nuclear extracts. Combination studies suggest that benzisothiazolone derivatives possess a synergistic effect with etoposide and doxorubicin. Furthermore, the compounds also inhibited the migration of A549 cells. CONCLUSION Benzisothiazolones bearing one or two electrophilic sulfur atoms as part of the heterocyclic framework exhibited cytotoxicity in Hodgkin's Lymphoma cells through NF-κB inhibition. In addition, these derivatives also exhibited a synergistic effect with etoposide and doxorubicin along with the ability to inhibit the migration of A549 cells. Our study suggests that BIT-based new chemical entities could lead to potential anticancer agents.
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Affiliation(s)
- Natarajan Nandakumar
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences and Oncology Laboratory, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel.,Department of Bioengineering, Clemson University, Clemson, SC, United States
| | | | - Jacob Gopas
- The Shraga Segal Department of Microbiology, Immunology and Genetics, Faculty of Health Sciences and Oncology Laboratory, Soroka University Medical Center, Ben-Gurion University of the Negev, Beer Sheva, Israel
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Abstract
Retrosynthetic analysis emerged in the 1960s as a teaching tool with profound implications. Its educational value can be appreciated by a glance at total synthesis manuscripts over 50 years later, most of which contain a retrosynthesis on page one. Its vision extended to computer language-a pioneering idea in the 20th century that continues to expand the frontiers today. The same principles that guide a student to evaluate, expand, and refine a series of bond dissections can be programmed, so that computer assistance can perform the same tasks but at faster speeds.The slow step in the synthesis of complex structures, however, is seldom route design. Compression of molecular information into close proximity (Cm/Å3) requires exploration and empiricism, a close connection between theory and experiment. Here, retrosynthetic analysis guides the choice of experiment, so that the most simplifying-but often least assured-disconnection is prioritized: a high-risk, high reward strategy. The reimagining of total synthesis in a future era of retrosynthetic software may involve, counterintuitively, target design, as discussed here.Compared to the 1960s, retrosynthetic analysis in the 21st century finds itself among computers of unimaginable power and a biology that is increasingly molecular. Put together, the logic of retrosynthesis, the insight of structural biology, and the predictions of computation have inspired us to imagine an integration of the three. The synthetic target is treated as dynamic-a constellation of related structures-in order to find the nearest congener with the closest affinity but the shortest synthetic route. Such an approach merges synthetic design with structural design toward the goal of improved access for improved function.In this Account, we detail the evolution of our program from its inception in traditional natural product (NP) total synthesis to its current expression through the lens of chemical informatics: a view of NPs as aggregates of molecular parameters that define single points in a chemical space. Early work on synthesis and biological annotation of apparent metal pool binders and nonselective covalent electrophiles (asmarine alkaloids, isocyanoterpenes, Nuphar dimers) gave way to NPs with well-defined protein targets. The plant metabolite salvinorin A (SalA) potently and selectively agonizes the κ-opioid receptor (KOR), rapidly penetrates the brain, and represents an important lead for next-generation analgesics and antipruritics. To synthesize and diversify this lead, we adopted what we now call a dynamic approach. Deletion of a central methyl group stabilized the SalA scaffold, opened quick synthetic access, and retained high potency and selectivity. The generality of this idea was then tested against another neuroactive class. As an alternative hypothesis to TrkB channels, we proposed that the so-called "neurotrophic" Illicium terpenes may bind to γ-aminobutyric acid (GABA)-gated ion channels to cause weak, chronic excitation. Syntheses of (-)-jiadifenolide, 3,6-dideoxy-10-hydroxypseudoanisatin, (-)-11-O-debenzoyltashironin, (-)-bilobalide, and (-)-picrotoxinin (PXN) allowed this hypothesis to be probed more broadly. Feedback from protein structure and synthetic reconnaissance led to a dynamic retrosynthesis of PXN and the identification of 5MePXN, a moderate GABAAR antagonist with greater aqueous stability available in eight steps from dimethylcarvone. We expect this dynamic approach to synthetic target analysis to become more feasible in the coming years and hope the next generation of scientists finds this approach helpful to address problems at the frontier of chemistry and biology.
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Affiliation(s)
- Stone Woo
- Department of Chemistry, Scripps Research, 10550 North Torrey Lines Road, La Jolla, California 92037, United States
| | - Ryan A Shenvi
- Department of Chemistry, Scripps Research, 10550 North Torrey Lines Road, La Jolla, California 92037, United States
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Sun X, Yang S, Wang Z, Liang S, Tian H, Yang S, Liu Y, Sun B, Zeng C. Electrochemically Oxidative Coupling of S‐H/S‐H for S‐S Bond Formation: A Facile Approach to Diacid‐disulfides. ChemistrySelect 2020. [DOI: 10.1002/slct.202000872] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Xue‐Jie Sun
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Shang‐Feng Yang
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Zhi‐Tong Wang
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Sen Liang
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Hong‐Yu Tian
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Shao‐Xiang Yang
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Yong‐Guo Liu
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Bao‐Guo Sun
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
| | - Cheng‐Chu Zeng
- Beijing advanced innovation center for food nutrition and human health, Beijing Key laboratory of Flavor ChemistryBeijing Technology and Business University Beijing 100048 China
- College of Life Science & BioengineeringBeijing University of Technology Beijing 100124 China
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Nuphar lutea Extracts Exhibit Anti-Viral Activity against the Measles Virus. Molecules 2020; 25:molecules25071657. [PMID: 32260270 PMCID: PMC7180909 DOI: 10.3390/molecules25071657] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2020] [Revised: 03/22/2020] [Accepted: 04/02/2020] [Indexed: 02/06/2023] Open
Abstract
Different parts of Nuphar lutea L. (yellow water lily) have been used to treat several inflammatory and pathogen-related diseases. It has shown that Nuphar lutea extracts (NUP) are active against various pathogens including bacteria, fungi, and leishmanial parasites. In an effort to detect novel therapeutic agents against negative-stranded RNA (- RNA) viruses, we have tested the effect of a partially-purified alkaloid mixture of Nuphar lutea leaves on the measles virus (MV). The MV vaccine’s Edmonston strain was used to acutely or persistently infect cells. The levels of several MV proteins were detected by a Western blot and immunocytochemistry. Viral RNAs were quantitated by qRT-PCR. Virus infectivity was monitored by infecting African green monkey kidney VERO cells’ monolayers. We showed that NUP protected cells from acute infection. Decreases in the MV P-, N-, and V-proteins were observed in persistently infected cells and the amount of infective virus released was reduced as compared to untreated cells. By examining viral RNAs, we suggest that NUP acts at the post-transcriptional level. We conclude, as a proof of concept, that NUP has anti-viral therapeutic activity against the MV. Future studies will determine the mechanism of action and the effect of NUP on other related viruses.
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Abstract
This review highlights the progress on the isolation, bioactivity, biogenesis and total synthesis of dimeric sesquiterpenoids since 2010.
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Affiliation(s)
- Lie-Feng Ma
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou
- P. R. China
| | - Yi-Li Chen
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou
- P. R. China
| | - Wei-Guang Shan
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou
- P. R. China
| | - Zha-Jun Zhan
- College of Pharmaceutical Science
- Zhejiang University of Technology
- Hangzhou
- P. R. China
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Composition and Biological Activity of Furanoquinolizidine Alkaloids from Yellow Water-Lily (Nuphar Lutea L. Smith) Rhizomes. Pharm Chem J 2019. [DOI: 10.1007/s11094-019-02042-8] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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Matsuda H, Nakamura S, Nakashima S, Fukaya M, Yoshikawa M. Biofunctional Effects of Thiohemiaminal-Type Dimeric Sesquiterpene Alkaloids from Nuphar Plants. Chem Pharm Bull (Tokyo) 2019; 67:666-674. [DOI: 10.1248/cpb.c18-01030] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Mallick DJ, Korotkov A, Li H, Wu J, Eastman A. Nuphar alkaloids induce very rapid apoptosis through a novel caspase-dependent but BAX/BAK-independent pathway. Cell Biol Toxicol 2019; 35:435-443. [PMID: 30826899 DOI: 10.1007/s10565-019-09469-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2018] [Accepted: 02/19/2019] [Indexed: 01/28/2023]
Abstract
Nuphar alkaloids, originally isolated from water lilies, induce apoptosis in mammalian cells in less than 1 h, making them possibly the fastest known inducers. However, the mechanism by which this rapid apoptosis occurs remains unknown. We have investigated canonical aspects of apoptosis to determine how the nuphar alkaloid, (+)-6-hydroxythiobinupharidine (6HTBN), induces apoptosis. 6HTBN induced rapid apoptosis in various leukemia, lymphoma, and carcinoma cell lines, suggesting that its mechanism is cell-type independent. It also circumvented resistance of patient-derived chronic lymphocytic leukemia cells generated by co-culture on survival-promoting stroma. Intriguingly, 6HTBN failed to induce apoptosis in platelets. The mechanism of apoptosis involves activation of caspase 9 and caspase 3, but not caspase 8 as previously reported. The release of cytochrome c from mitochondria occurred even in the absence of BAX/BAK and in cells that retained mitochondrial membrane potential. These results suggest a novel mechanism of apoptosis that has previously not been reported. The molecular target of the nuphar alkaloids remains to be determined.
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Affiliation(s)
- David J Mallick
- Department of Molecular and Systems Biology, Geisel School of Medicine, Lebanon, NH, USA
| | | | - Hui Li
- Department of Chemistry, Dartmouth College, Hanover, NH, USA
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, NH, USA.,Norris Cotton Cancer Center, Geisel School of Medicine, Rubin Building Level 6, One Medical Center Drive, Lebanon, NH, 03756, USA
| | - Alan Eastman
- Department of Molecular and Systems Biology, Geisel School of Medicine, Lebanon, NH, USA. .,Norris Cotton Cancer Center, Geisel School of Medicine, Rubin Building Level 6, One Medical Center Drive, Lebanon, NH, 03756, USA.
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Babaei G, Aliarab A, Abroon S, Rasmi Y, Aziz SGG. Application of sesquiterpene lactone: A new promising way for cancer therapy based on anticancer activity. Biomed Pharmacother 2018; 106:239-246. [PMID: 29966966 DOI: 10.1016/j.biopha.2018.06.131] [Citation(s) in RCA: 88] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2018] [Revised: 06/24/2018] [Accepted: 06/25/2018] [Indexed: 12/20/2022] Open
Abstract
Cancer is one of the most dangerous diseases that are rapidly increasing globally. After heart disease, it is the second leading cause of death, accounting for seven million deaths each year. Chemotherapy is the use of cytotoxic drugs on cancer cells. But the use of common chemotherapy drugs poses a problem due their high side effects and low efficacy. As a result, efforts are on to find new potent compounds with low side effects. The compounds extracted from plants have been studied in this regard due to their prevalence. Sesquiterpene lactones are a group of natural compounds that were first detected in Asteraceae dark plants. These compounds exercise their effects by reacting with functional groups available on proteins and enzymes, especially the thiol group. Owing to the high side effects as an antitumor synthetic drugs, efforts are being made to find drugs with high efficiency and low side effects. Their high structural ranges have attracted the attention of many researchers as a potential source of new anticancer drugs.
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Affiliation(s)
- Ghader Babaei
- Department of Clinical Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Azadeh Aliarab
- Department of Clinical Biochemistry, Faculty of Medicine, Shahid Beheshti University of Medical sciences, Tehran, Iran
| | - Sina Abroon
- Department of Clinical Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
| | - Yusof Rasmi
- Department of Clinical Biochemistry, Faculty of Medicine, Urmia University of Medical Sciences, Urmia, Iran
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Kohyama A. Total Synthesis of Nuphar Thioalkaloid and Their Hidden Electrophilicity. J SYN ORG CHEM JPN 2018. [DOI: 10.5059/yukigoseikyokaishi.76.624] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Aki Kohyama
- Graduate School of Medicine and Pharmaceutical Sciences, University of Toyama
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15
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Chuentragool P, Parasram M, Shi Y, Gevorgyan V. General, Mild, and Selective Method for Desaturation of Aliphatic Amines. J Am Chem Soc 2018; 140:2465-2468. [PMID: 29400959 PMCID: PMC5821538 DOI: 10.1021/jacs.8b00488] [Citation(s) in RCA: 96] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
Abstract
A novel method for desaturation of aliphatic amines into enamines as well as allylic and homoallylic amines has been developed. This general protocol operates via putative aryl hybrid Pd-radical intermediates, which combine the signature features of radical chemistry, a hydrogen atom transfer (HAT) process, and transition metal chemistry, a selective β-hydride elimination step, to achieve efficient and selective desaturation of amines. These hybrid Pd-radical intermediates are efficiently generated under mild photoinduced conditions and are capable of a 1,n-HAT (n = 5-7) event at C(sp3)-H sites. The selectivity of HAT is tunable by varying different auxiliaries, which highlight the generality of this method. Remarkably, this desaturation method, which operates under mild conditions and does not require employment of exogenous photosensitizers or oxidants, can be performed in a practical scalable fashion from simple amines.
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Affiliation(s)
- Padon Chuentragool
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Marvin Parasram
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Yi Shi
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
| | - Vladimir Gevorgyan
- Department of Chemistry, University of Illinois at Chicago, 845 West Taylor Street, Chicago, Illinois 60607-7061, United States
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Fedotcheva TA, Sheichenko OP, Anufrieva VV, Sheichenko VI, Fedotcheva NI, Shimanovskii NL. Preparation of Nuflein - an Alkaloid from the Yellow Waterlily Nuphar Lutea - and its Cytotoxic Action on Cultures of Normal and Tumorous Human Cells. Pharm Chem J 2017. [DOI: 10.1007/s11094-017-1658-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Lacharity JJ, Fournier J, Lu P, Mailyan AK, Herrmann AT, Zakarian A. Total Synthesis of Unsymmetrically Oxidized Nuphar Thioalkaloids via Copper-Catalyzed Thiolane Assembly. J Am Chem Soc 2017; 139:13272-13275. [PMID: 28911224 PMCID: PMC6309176 DOI: 10.1021/jacs.7b07685] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
An asymmetric total synthesis of (+)-6-hydroxythiobinupharidine (1b) and (-)-6-hydroxythionuphlutine (2b), a set of hemiaminal containing dimeric sesquiterpenes isolated from yellow water lilies of the Nuphar genus, is described. The central bis-spirocyclic tetrahydrothiophene ring was forged through the Stevens rearrangement of a sulfonium ylide, generated in situ from the coupling of a copper-carbene with a spirocyclic thietane. This strategy diverges both from the proposed biosynthesis1 and previous syntheses of this family of alkaloids,2,3 all of which employ dimerization of symmetric monomers to form the aforementioned thiaspirane. The coupling of unsymmetrical monomers allowed access to the unsymmetrically oxidized product 2b for the first time.
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Affiliation(s)
- Jacob J. Lacharity
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | | | | | - Artur K. Mailyan
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
| | | | - Armen Zakarian
- Department of Chemistry and Biochemistry, University of California, Santa Barbara, California 93106, United States
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Li H, Cooke TJ, Korotkov A, Chapman CW, Eastman A, Wu J. Stereoselective Synthesis and Biological Evaluation of C1-Epimeric and Desmethyl Monomeric Nuphar Analogues. J Org Chem 2017; 82:2648-2655. [DOI: 10.1021/acs.joc.6b03052] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Affiliation(s)
- Hui Li
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Timothy J. Cooke
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Alexander Korotkov
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
| | - Charles W. Chapman
- Molecular
and Systems Biology, Geisel School of Medicine, Lebanon, New Hampshire 03756, United States
| | - Alan Eastman
- Molecular
and Systems Biology, Geisel School of Medicine, Lebanon, New Hampshire 03756, United States
| | - Jimmy Wu
- Department of Chemistry, Dartmouth College, Hanover, New Hampshire 03755, United States
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Abstract
This review defines symmetric molecules from a synthetic perspective and shows various strategies that take advantage of molecular symmetry to construct them.
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Affiliation(s)
- Wen-Ju Bai
- Department of Chemistry
- Stanford University
- Stanford
- USA
| | - Xiqing Wang
- College of Bioscience and Biotechnology
- Yangzhou University
- Yangzhou
- China
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Marcaurelle LA, Mulvihill MJ. Nuphar Dimers: Crouching Sulfur, Hidden Reactivity. ACS CENTRAL SCIENCE 2016; 2:367-369. [PMID: 27413779 PMCID: PMC4919775 DOI: 10.1021/acscentsci.6b00166] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
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