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Lu H, Handore KL, Wood TE, Shimokura GK, Schimmer AD, Batey RA. Total Synthesis of the 2,5-Disubstituted γ-Pyrone E1 UAE Inhibitor Himeic Acid A. Org Lett 2023; 25:7502-7506. [PMID: 37801638 DOI: 10.1021/acs.orglett.3c02761] [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: 10/08/2023]
Abstract
The first total synthesis of the E1 ubiquitin-activating enzyme inhibitor, himeic acid A, is reported. A McCombie reaction was used to form the core γ-pyrone via a 6π-electrocyclization. A dioxenone ring-opening/acyl ketene trapping reaction with a primary amide provided the unusual unsymmetrical imide functionality. Other key steps include the use of an Evans auxiliary alkylation (d.r. ≥ 95:5) to install the (S)-2-methyl succinic acid fragment and a cross-metathesis to install the unsaturated side-chain.
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Affiliation(s)
- Heyuan Lu
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Kishor L Handore
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Tabitha E Wood
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Grace K Shimokura
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
| | - Aaron D Schimmer
- Princess Margaret Cancer Centre, University Health Network, 101 College Street, Toronto, ON M5G 1L7, Canada
| | - Robert A Batey
- Davenport Research Laboratories, Dept. of Chemistry, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
- Acceleration Consortium, University of Toronto, 80 St. George Street, Toronto, ON M5S 3H6, Canada
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Lam YTH, Hoppe J, Dang QN, Porzel A, Soboleva A, Brandt W, Rennert R, Hussain H, Davari MD, Wessjohann L, Arnold N. Purpurascenines A-C, Azepino-Indole Alkaloids from Cortinarius purpurascens: Isolation, Biosynthesis, and Activity Studies on the 5-HT 2A Receptor. JOURNAL OF NATURAL PRODUCTS 2023; 86:1373-1384. [PMID: 37306303 DOI: 10.1021/acs.jnatprod.2c00716] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Three previously undescribed azepino-indole alkaloids, named purpurascenines A-C (1-3), together with the new-to-nature 7-hydroxytryptophan (4) as well as two known compounds, adenosine (5) and riboflavin (6), were isolated from fruiting bodies of Cortinarius purpurascens Fr. (Cortinariaceae). The structures of 1-3 were elucidated based on spectroscopic analyses and ECD calculations. Furthermore, the biosynthesis of purpurascenine A (1) was investigated by in vivo experiments using 13C-labeled sodium pyruvate, alanine, and sodium acetate incubated with fruiting bodies of C. purpurascens. The incorporation of 13C into 1 was analyzed using 1D NMR and HRESIMS methods. With [3-13C]-pyruvate, a dramatic enrichment of 13C was observed, and hence a biosynthetic route via a direct Pictet-Spengler reaction between α-keto acids and 7-hydroxytryptophan (4) is suggested for the biosynthesis of purpurascenines A-C (1-3). Compound 1 exhibits no antiproliferative or cytotoxic effects against human prostate (PC-3), colorectal (HCT-116), and breast (MCF-7) cancer cells. An in silico docking study confirmed the hypothesis that purpurascenine A (1) could bind to the 5-HT2A serotonin receptor's active site. A new functional 5-HT2A receptor activation assay showed no functional agonistic but some antagonistic effects of 1 against the 5-HT-dependent 5-HT2A activation and likely antagonistic effects on putative constitutive activity of the 5-HT2A receptor.
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Affiliation(s)
- Yen T H Lam
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
- Department of Organic Chemistry, Faculty of Chemistry, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi 100000, Vietnam
| | - Jana Hoppe
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Quang N Dang
- Department of Organic Chemistry, Faculty of Chemistry, Hanoi National University of Education, 136 Xuanthuy, Caugiay, Hanoi 100000, Vietnam
| | - Andrea Porzel
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Alena Soboleva
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Wolfgang Brandt
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Robert Rennert
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Hidayat Hussain
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Mehdi D Davari
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Ludger Wessjohann
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
| | - Norbert Arnold
- Department of Bioorganic Chemistry, Leibniz Institute of Plant Biochemistry, Weinberg 3, D-06120 Halle (Saale), Germany
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Roy MS, Meng X, Koda K, Shrestha A, Putman JI, Gout D, Armstrong DW, Lovely CJ. Total synthesis of haploscleridamine, villagorgin A and an approach towards lissoclin C. Org Biomol Chem 2023; 21:1422-1434. [PMID: 36723147 DOI: 10.1039/d2ob01908f] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
An investigation of asymmetric total syntheses of three indole-imidazole alkaloids from histidine are described. A common advanced piperidinone was contructed via a ring-closing metathesis which was then subjected to a modified Fischer indole synthesis. Deprotection of an N-tosyl group via a dissolving metal reduction affords haploscleridamine which upon reaction with aqueous formaldehyde in trifluoroethanol provided villagorgin A. On closer examination, it was found that villagorgin A was produced as a byproduct during the reductive detosylation in the presence of magnesium and methanol. Attempts to obtain the brominated haploscleridamine congener, lissoclin C through use of bromophenyl hydrazone were thwarted by reductive debromination during deprotection efforts. Investigation of the enantiopurity of the synthetic natural products revealed production of almost racemic materials in some batches as the result of partial racemization of an early stage intermediate. A revised approach routinely provided scalemic haploscleridamine and villagorgin in 30% ee. Analysis of the enantiomer composition of all intermediates by HPLC using columns with chiral stationary phases; this analysis revealed several steps where erosion of enantiomer composition occurred.
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Affiliation(s)
- Moumita Singha Roy
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Xiaofeng Meng
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Karuna Koda
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Andrina Shrestha
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Joshua I Putman
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Delphine Gout
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Daniel W Armstrong
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
| | - Carl J Lovely
- Department of Chemistry and Biochemistry, University of Texas Arlington, Arlington, TX76019-0065, USA.
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Structural analysis of previously unknown natural products using computational methods. J Nat Med 2022; 76:719-724. [PMID: 35849303 PMCID: PMC9411225 DOI: 10.1007/s11418-022-01637-y] [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: 02/21/2022] [Accepted: 06/22/2022] [Indexed: 10/24/2022]
Abstract
Natural products exhibit structural diversity, and biologically active natural products with unprecedented molecular skeletons can potentially be isolated from natural resources in the future. Although it has often been difficult to determine the structures and configurations of new compounds that do not resemble known compounds, the determination of the chemical structures, including the absolute stereo configuration, is very important in drug discovery research. In our efforts to find new bioactive natural products, we have identified novel compounds such as the ubiquitin-proteasome system inhibitors and osteoclast differentiation inhibitors. Various natural products, mixtures of stereoisomers of natural products, and compounds with novel skeletal structures were studied. In cases where it was difficult to determine the structures by NMR spectroscopy, we could successfully determine the chemical structures by computational chemistry. This review presents the results of structural analysis obtained using computational methods for several natural products that we have recently isolated.
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Fenteany G, Sharma G, Gaur P, Borics A, Wéber E, Kiss E, Haracska L. A series of xanthenes inhibiting Rad6 function and Rad6-Rad18 interaction in the PCNA ubiquitination cascade. iScience 2022; 25:104053. [PMID: 35355521 PMCID: PMC8958325 DOI: 10.1016/j.isci.2022.104053] [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: 06/15/2021] [Revised: 12/13/2021] [Accepted: 03/08/2022] [Indexed: 11/24/2022] Open
Abstract
Ubiquitination of proliferating cell nuclear antigen (PCNA) triggers pathways of DNA damage tolerance, including mutagenic translesion DNA synthesis, and comprises a cascade of reactions involving the E1 ubiquitin-activating enzyme Uba1, the E2 ubiquitin-conjugating enzyme Rad6, and the E3 ubiquitin ligase Rad18. We report here the discovery of a series of xanthenes that inhibit PCNA ubiquitination, Rad6∼ubiquitin thioester formation, and the Rad6–Rad18 interaction. Structure-activity relationship experiments across multiple assays reveal chemical and structural features important for different activities along the pathway to PCNA ubiquitination. The compounds that inhibit these processes are all a subset of the xanthen-3-ones we tested. These small molecules thus represent first-in-class probes of Rad6 function and the association of Rad6 and Rad18, the latter being a new inhibitory activity discovered for a small molecule, in the PCNA ubiquitination cascade and potential therapeutic agents to contain cancer progression. Alpha-based HTS for PCNA ubiquitination modulators Target-based characterization of hits A series of xanthenes that inhibit Rad6 functions and Rad6–Rad18 interaction
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Nishimura S, Hitora Y, Kawahara T, Tanabe M, Ogata E, Kato H, Srikoon P, Watanabe T, Tsukamoto S. Cell-based screening of extracts of natural sources to search for inhibitors of the ubiquitin–proteasome system and identification of proteasome inhibitors from the fungus Remotididymella sp. Bioorg Med Chem Lett 2022; 59:128566. [DOI: 10.1016/j.bmcl.2022.128566] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2021] [Revised: 01/06/2022] [Accepted: 01/13/2022] [Indexed: 11/02/2022]
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CHEN BR, GAO CL, LIU J, GUO YW, JIANG JL, PANG T, LI XW. Diversity-oriented synthesis of marine sponge derived hyrtioreticulins and their anti-inflammatory activities. Chin J Nat Med 2022; 20:74-80. [DOI: 10.1016/s1875-5364(22)60155-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2021] [Indexed: 11/03/2022]
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Upadhyay A. Natural compounds in the regulation of proteostatic pathways: An invincible artillery against stress, ageing, and diseases. Acta Pharm Sin B 2021; 11:2995-3014. [PMID: 34729300 PMCID: PMC8546668 DOI: 10.1016/j.apsb.2021.01.006] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Revised: 10/12/2020] [Accepted: 11/03/2020] [Indexed: 01/13/2023] Open
Abstract
Cells have different sets of molecules for performing an array of physiological functions. Nucleic acids have stored and carried the information throughout evolution, whereas proteins have been attributed to performing most of the cellular functions. To perform these functions, proteins need to have a unique conformation and a definite lifespan. These attributes are achieved by a highly coordinated protein quality control (PQC) system comprising chaperones to fold the proteins in a proper three-dimensional structure, ubiquitin-proteasome system for selective degradation of proteins, and autophagy for bulk clearance of cell debris. Many kinds of stresses and perturbations may lead to the weakening of these protective cellular machinery, leading to the unfolding and aggregation of cellular proteins and the occurrence of numerous pathological conditions. However, modulating the expression and functional efficiency of molecular chaperones, E3 ubiquitin ligases, and autophagic proteins may diminish cellular proteotoxic load and mitigate various pathological effects. Natural medicine and small molecule-based therapies have been well-documented for their effectiveness in modulating these pathways and reestablishing the lost proteostasis inside the cells to combat disease conditions. The present article summarizes various similar reports and highlights the importance of the molecules obtained from natural sources in disease therapeutics.
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Key Words
- 17-AAG, 17-allylamino-geldanamycin
- APC, anaphase-promoting complex
- Ageing
- Autophagy
- BAG, BCL2-associated athanogene
- CAP, chaperone-assisted proteasomal degradation
- CASA, chaperone-assisted selective autophagy
- CHIP, carboxy-terminus of HSC70 interacting protein
- CMA, chaperone-mediated autophagy
- Cancer
- Chaperones
- DUBs, deubiquitinases
- Drug discovery
- EGCG, epigallocatechin-3-gallate
- ESCRT, endosomal sorting complexes required for transport
- HECT, homologous to the E6-AP carboxyl terminus
- HSC70, heat shock cognate 70
- HSF1, heat shock factor 1
- HSP, heat shock protein
- KFERQ, lysine-phenylalanine-glutamate-arginine-glutamine
- LAMP2a, lysosome-associated membrane protein 2a
- LC3, light chain 3
- NBR1, next to BRCA1 gene 1
- Natural molecules
- Neurodegeneration
- PQC, protein quality control
- Proteinopathies
- Proteostasis
- RING, really interesting new gene
- UPS, ubiquitin–proteasome system
- Ub, ubiquitin
- Ubiquitin proteasome system
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Affiliation(s)
- Arun Upadhyay
- Department of Biochemistry, Central University of Rajasthan, Bandar Sindari, Kishangarh, Ajmer, Rajasthan 305817, India
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Gaur P, Fenteany G, Tyagi C. Mode of inhibitory binding of epigallocatechin gallate to the ubiquitin-activating enzyme Uba1 via accelerated molecular dynamics. RSC Adv 2021; 11:8264-8276. [PMID: 35423322 PMCID: PMC8695214 DOI: 10.1039/d0ra09847g] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2020] [Accepted: 02/03/2021] [Indexed: 12/19/2022] Open
Abstract
The green tea polyphenol (−)-epigallocatechin-3-gallate (EGCG) and some of its analogs potently inhibit the ubiquitin-activating enzyme Uba1. In an effort to understand the possible molecular basis of inhibitory activity of EGCG, we conducted a molecular docking and molecular dynamics simulation study. We found that EGCG and its two selected analogs, (−)-epicatechin-3-gallate (ECG) and (−)-epigallocatechin (EGC), bind favorably at two likely hot spots for small-molecule ligand binding on human Uba1. The compounds bind with energetics that mirror their experimental potency for inhibition of Uba1∼ubiquitin thioester formation. The binding of EGCG, ECG, and EGC at one of the hot spots, in particular, recapitulates the rank order of potency determined experimentally and suggests a possible mechanism for inhibition. A hinge-like conformational change of the second catalytic cysteine domain and the opposing ubiquitin-fold domain observed during accelerated molecular dynamics simulations of the EGCG-bound Uba1 complex that results in disruption of the ubiquitin-binding interfaces could explain the compounds' inhibitory activity. These results shed light on the possible molecular mechanism of EGCG and related catechins in the inhibition of Uba1. The hinge-like movement of the SCCH domain upon ligand binding closes the ubiquitin binding site and disrupts the interfaces crucial for thioester bond formation.![]()
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Affiliation(s)
- Paras Gaur
- Institute of Genetics, Biological Research Centre Temesvári krt. 62 6726 Szeged Hungary.,Doctoral School of Biology, Faculty of Sciences and Informatics, University of Szeged Közép fasor 52 Szeged 6726 Hungary
| | - Gabriel Fenteany
- Institute of Genetics, Biological Research Centre Temesvári krt. 62 6726 Szeged Hungary
| | - Chetna Tyagi
- Doctoral School of Biology, Faculty of Sciences and Informatics, University of Szeged Közép fasor 52 Szeged 6726 Hungary .,Department of Microbiology, Faculty of Science and Informatics, University of Szeged Közép fasor 52 6726 Szeged Hungary
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10
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Park JS, Cho E, Hwang JY, Park SC, Chung B, Kwon OS, Sim CJ, Oh DC, Oh KB, Shin J. Bioactive Bis(indole) Alkaloids from a Spongosorites sp. Sponge. Mar Drugs 2020; 19:3. [PMID: 33374750 PMCID: PMC7824209 DOI: 10.3390/md19010003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2020] [Revised: 12/15/2020] [Accepted: 12/18/2020] [Indexed: 12/24/2022] Open
Abstract
Six new bis(indole) alkaloids (1-6) along with eight known ones of the topsentin class were isolated from a Spongosorites sp. sponge of Korea. Based on the results of combined spectroscopic analyses, the structures of spongosoritins A-D (1-4) were determined to possess a 2-methoxy-1-imidazole-5-one core connecting the indole moieties, and these were linked by a linear urea bridge for spongocarbamides A (5) and B (6). The absolute configurations of spongosoritins were assigned by electronic circular dichroism (ECD) computation. The new compounds exhibited moderate inhibition against transpeptidase sortase A and weak inhibition against human pathogenic bacteria and A549 and K562 cancer cell lines.
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Affiliation(s)
- Jae Sung Park
- Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea; (J.S.P.); (J.-Y.H.); (S.C.P.); (O.-S.K.); (D.-C.O.)
| | - Eunji Cho
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (B.C.)
| | - Ji-Yeon Hwang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea; (J.S.P.); (J.-Y.H.); (S.C.P.); (O.-S.K.); (D.-C.O.)
| | - Sung Chul Park
- Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea; (J.S.P.); (J.-Y.H.); (S.C.P.); (O.-S.K.); (D.-C.O.)
| | - Beomkoo Chung
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (B.C.)
| | - Oh-Seok Kwon
- Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea; (J.S.P.); (J.-Y.H.); (S.C.P.); (O.-S.K.); (D.-C.O.)
| | - Chung J. Sim
- Department of Biological Sciences, College of Life Science and Nano Technology, Hannam University, 461-6 Jeonmin, Yuseong, Daejeon 305-811, Korea;
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea; (J.S.P.); (J.-Y.H.); (S.C.P.); (O.-S.K.); (D.-C.O.)
| | - Ki-Bong Oh
- Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (B.C.)
| | - Jongheon Shin
- Natural Products Research Institute, College of Pharmacy, Seoul National University, San 56-1, Sillim, Gwanak, Seoul 151-742, Korea; (J.S.P.); (J.-Y.H.); (S.C.P.); (O.-S.K.); (D.-C.O.)
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11
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Abstract
Post-translational modifications of cellular substrates with ubiquitin and ubiquitin-like proteins (UBLs), including ubiquitin, SUMOs, and neural precursor cell-expressed developmentally downregulated protein 8, play a central role in regulating many aspects of cell biology. The UBL conjugation cascade is initiated by a family of ATP-dependent enzymes termed E1 activating enzymes and executed by the downstream E2-conjugating enzymes and E3 ligases. Despite their druggability and their key position at the apex of the cascade, pharmacologic modulation of E1s with potent and selective drugs has remained elusive until 2009. Among the eight E1 enzymes identified so far, those initiating ubiquitylation (UBA1), SUMOylation (SAE), and neddylation (NAE) are the most characterized and are implicated in various aspects of cancer biology. To date, over 40 inhibitors have been reported to target UBA1, SAE, and NAE, including the NAE inhibitor pevonedistat, evaluated in more than 30 clinical trials. In this Review, we discuss E1 enzymes, the rationale for their therapeutic targeting in cancer, and their different inhibitors, with emphasis on the pharmacologic properties of adenosine sulfamates and their unique mechanism of action, termed substrate-assisted inhibition. Moreover, we highlight other less-characterized E1s-UBA6, UBA7, UBA4, UBA5, and autophagy-related protein 7-and the opportunities for targeting these enzymes in cancer. SIGNIFICANCE STATEMENT: The clinical successes of proteasome inhibitors in cancer therapy and the emerging resistance to these agents have prompted the exploration of other signaling nodes in the ubiquitin-proteasome system including E1 enzymes. Therefore, it is crucial to understand the biology of different E1 enzymes, their roles in cancer, and how to translate this knowledge into novel therapeutic strategies with potential implications in cancer treatment.
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Affiliation(s)
- Samir H Barghout
- Department of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada (S.H.B., A.D.S.); Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada (S.H.B., A.D.S.); and Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tanta University, Tanta, Egypt (S.H.B.)
| | - Aaron D Schimmer
- Department of Medical Biophysics, Faculty of Medicine, University of Toronto, Toronto, Ontario, Canada (S.H.B., A.D.S.); Princess Margaret Cancer Centre, University Health Network, Toronto, Ontario, Canada (S.H.B., A.D.S.); and Department of Pharmacology and Toxicology, Faculty of Pharmacy, Tanta University, Tanta, Egypt (S.H.B.)
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Inhibition of the Ubiquitin-Activating Enzyme UBA1 Suppresses Diet-Induced Atherosclerosis in Apolipoprotein E-Knockout Mice. J Immunol Res 2020; 2020:7812709. [PMID: 32258175 PMCID: PMC7109586 DOI: 10.1155/2020/7812709] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 02/04/2020] [Accepted: 02/28/2020] [Indexed: 01/17/2023] Open
Abstract
Background Ubiquitin-like modifier activating enzyme 1 (UBA1) is the first and major E1 activating enzyme in ubiquitin activation, the initial step of the ubiquitin-proteasome system. Defects in the expression or activity of UBA1 correlate with several neurodegenerative and cardiovascular disorders. However, whether UBA1 contributes to atherosclerosis is not defined. Methods and Results Atherosclerosis was induced in apolipoprotein E-knockout (Apoe-/-) mice fed on an atherogenic diet. UBA1 expression, detected by immunohistochemical staining, was found to be significantly increased in the atherosclerotic plaques, which confirmed to be mainly derived from lesional CD68+ macrophages via immunofluorescence costaining. Inactivation of UBA1 by the specific inhibitor PYR-41 did not alter the main metabolic parameters during atherogenic diet feeding but suppressed atherosclerosis development with less macrophage infiltration and plaque necrosis. PYR-41 did not alter circulating immune cells determined by flow cytometry but significantly reduced aortic mRNA levels of cytokines related to monocyte recruitment (Mcp-1, Vcam-1, and Icam-1) and macrophage proinflammatory responses (Il-1β and Il-6). Besides, PYR-41 also suppressed aortic mRNA expression of NADPH oxidase (Nox1, Nox2, and Nox4) and lesional oxidative stress levels, determined by DHE staining. In vitro, PYR-41 blunted ox-LDL-induced lipid deposition and expression of proinflammatory cytokines (Il-1β and Il-6) and NADPH oxidases (Nox1, Nox2, and Nox4) in cultured RAW264.7 macrophages. Conclusions We demonstrated that UBA1 expression was upregulated and mainly derived from macrophages in the atherosclerotic plaques and inactivation of UBA1 by PYR-41 suppressed atherosclerosis development probably through inhibiting macrophage proinflammatory response and oxidative stress. Our data suggested that UBA1 might be explored as a potential pharmaceutical target against atherosclerosis.
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Multilevel structure-activity profiling reveals multiple green tea compound families that each modulate ubiquitin-activating enzyme and ubiquitination by a distinct mechanism. Sci Rep 2019; 9:12801. [PMID: 31488855 PMCID: PMC6728334 DOI: 10.1038/s41598-019-48888-6] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2019] [Accepted: 08/14/2019] [Indexed: 12/12/2022] Open
Abstract
We developed and implemented a reconstituted system to screen for modulators of the ubiquitination of proliferating cell nuclear antigen, a process that activates pathways of DNA damage tolerance and drug resistance. We identified the primary putatively health-beneficial green tea polyphenol epigallocatechin gallate (EGCG) and certain related small molecules as potent inhibitors of ubiquitination. EGCG directly and reversibly targets the ubiquitin-activating enzyme Uba1, blocking formation of the Uba1~ubiquitin thioester conjugate and thus ubiquitination and in the cell. Structure–activity relationship profiles across multiple biochemical and cellular assays for a battery of EGCG analogues revealed distinct chemical and mechanism-of-action clusters of molecules, with catechin gallates, alkyl gallates, and myricetin potently inhibiting ubiquitination. This study defines a number of related though distinct first-in-class inhibitors of ubiquitination, each series with its own unique activity pattern and mechanistic signature.
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14
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Hanif N, Murni A, Tanaka C, Tanaka J. Marine Natural Products from Indonesian Waters. Mar Drugs 2019; 17:md17060364. [PMID: 31248122 PMCID: PMC6627775 DOI: 10.3390/md17060364] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Revised: 06/10/2019] [Accepted: 06/11/2019] [Indexed: 12/13/2022] Open
Abstract
Natural products are primal and have been a driver in the evolution of organic chemistry and ultimately in science. The chemical structures obtained from marine organisms are diverse, reflecting biodiversity of genes, species and ecosystems. Biodiversity is an extraordinary feature of life and provides benefits to humanity while promoting the importance of environment conservation. This review covers the literature on marine natural products (MNPs) discovered in Indonesian waters published from January 1970 to December 2017, and includes 732 original MNPs, 4 structures isolated for the first time but known to be synthetic entities, 34 structural revisions, 9 artifacts, and 4 proposed MNPs. Indonesian MNPs were found in 270 papers from 94 species, 106 genera, 64 families, 32 orders, 14 classes, 10 phyla, and 5 kingdoms. The emphasis is placed on the structures of organic molecules (original and revised), relevant biological activities, structure elucidation, chemical ecology aspects, biosynthesis, and bioorganic studies. Through the synthesis of past and future data, huge and partly undescribed biodiversity of marine tropical invertebrates and their importance for crucial societal benefits should greatly be appreciated.
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Affiliation(s)
- Novriyandi Hanif
- Department of Chemistry, Faculty of Mathematics and Natural Sciences, IPB University (Bogor Agricultural University), Bogor 16680, Indonesia.
| | - Anggia Murni
- Tropical Biopharmaca Research Center, IPB University (Bogor Agricultural University), Bogor 16128, Indonesia.
| | - Chiaki Tanaka
- Department of Natural Products Chemistry, Graduate School of Pharmaceutical Sciences, Kyushu University, Fukuoka 812-8582, Japan.
| | - Junichi Tanaka
- Department of Chemistry, Biology, and Marine Science, University of the Ryukyus, Nishihara, Okinawa 903-0213, Japan.
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15
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Li Z, Hong LL, Gu BB, Sun YT, Wang J, Liu JT, Lin HW. Natural Products from Sponges. SYMBIOTIC MICROBIOMES OF CORAL REEFS SPONGES AND CORALS 2019. [PMCID: PMC7122408 DOI: 10.1007/978-94-024-1612-1_15] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
The sponge is one of the oldest multicellular invertebrates in the world. Marine sponges represent one of the extant metazoans of 700–800 million years. They are classified in four major classes: Calcarea, Demospongiae, Hexactinellida, and Homoscleromorpha. Among them, three genera, namely, Haliclona, Petrosia, and Discodemia have been identified to be the richest source of biologically active compounds. So far, 15,000 species have been described, and among them, more than 6000 species are found in marine and freshwater systems throughout tropical, temperate, and polar regions. More than 5000 different compounds have been isolated and structurally characterized to date, contributing to about 30% of all marine natural products. The chemical diversity of sponge products is high with compounds classified as alkaloids, terpenoids, peptides, polyketides, steroids, and macrolides, which integrate a wide range of biological activities, including antibacterial, anticancer, antifungal, anti-HIV, anti-inflammatory, and antimalarial. There is an open debate whether all natural products isolated from sponges are produced by sponges or are in fact derived from microorganisms that are inhaled though filter-feeding or that live within the sponges. Apart from their origin and chemoecological functions, sponge-derived metabolites are also of considerable interest in drug development. Therefore, development of recombinant microorganisms engineered for efficient production of sponge-derived products is a promising strategy that deserves further attention in future investigations in order to address the limitations regarding sustainable supply of marine drugs.
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Affiliation(s)
- Zhiyong Li
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism, School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, China
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16
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Kato H, Sebe M, Nagaki M, Eguchi K, Kagiyama I, Hitora Y, Frisvad JC, Williams RM, Tsukamoto S. Taichunins A-D, Norditerpenes from Aspergillus taichungensis (IBT 19404). JOURNAL OF NATURAL PRODUCTS 2019; 82:1377-1381. [PMID: 30995043 DOI: 10.1021/acs.jnatprod.8b01032] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/09/2023]
Abstract
Four new norditerpenes, taichunins A-D (1-4), were isolated from the fungus Aspergillus taichungensis (IBT 19404). Compound 1 has a new carbon framework. The absolute configurations were determined by the calculated ECD spectral method. Compound 1 was cytotoxic against HeLa cells with an IC50 value of 4.5 μM, whereas 2-4 were nontoxic at 50 μM.
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Affiliation(s)
- Hikaru Kato
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
| | - Momona Sebe
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
| | - Mika Nagaki
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
| | - Keisuke Eguchi
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
| | - Ippei Kagiyama
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
| | - Yuki Hitora
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
| | - Jens C Frisvad
- Section for Eukaryotic Biotechnology, Departments of System Biology , Technical University of Denmark , Building 221, 2800 Kongens Lyngby , Denmark
| | - Robert M Williams
- Department of Chemistry , Colorado State University , 301 West Pitkin Street , Fort Collins , Colorado 80523 , United States
- University of Colorado Cancer Center , Aurora , Colorado 80045 , United States
| | - Sachiko Tsukamoto
- Graduate School of Pharmaceutical Sciences , Kumamoto University , 5-1 Oe-honmachi , Kumamoto 862-0973 , Japan
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17
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18
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19
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Novanna M, Ethiraj K, Kannadasan S. An Overview of Synthesis of Indole Alkaloids and Biological Activities of Secondary Metabolites Isolated from Hyrtios Species. Mini Rev Med Chem 2019; 19:194-205. [DOI: 10.2174/1389557518666181102110537] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2016] [Revised: 02/03/2017] [Accepted: 03/06/2017] [Indexed: 11/22/2022]
Abstract
Marine sponges are a rich source of more than 50% of marine natural compounds that have
been isolated from marine organisms. This review article is focused on the importance of biologically
active and pharmaceutically important secondary metabolites extracted from one of the important
classes of marine sponge Hyrtios sp. This review also deals with reported synthetic routes of some indole
alkaloids extracted from the marine sponge Hyrtios sp. A range of bioactivities displayed by
indole-based alkaloids is described.
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Affiliation(s)
- M. Novanna
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore-632014, Tamil Nadu, India
| | - K.R. Ethiraj
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore-632014, Tamil Nadu, India
| | - S. Kannadasan
- Department of Chemistry, School of Advanced Sciences, VIT, Vellore-632014, Tamil Nadu, India
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20
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Muhammad ZA, Radwan MA, Farghaly TA, Gaber HM, Elaasser MM. Synthesis and Antitumor Activity of Novel [1,2,4,5]-tetrazepino[6,7-b] indole Derivatives: Marine Natural Product Hyrtioreticuline C and D Analogues. Mini Rev Med Chem 2018; 19:79-86. [DOI: 10.2174/1389557518666180724094244] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2017] [Revised: 09/21/2017] [Accepted: 12/27/2017] [Indexed: 11/22/2022]
Abstract
Background: Several biologically active indole alkaloids have been isolated from marine organisms over the previous few years. Many scientsts interested in synthesis of the marine azepinoindole alkaloids due to their wide range of bioliogical activies. </P><P> Objective: We interested herein to synthesize a new series of some analogues of new naturally occurring azepinoindole alkaloids. </P><P> Method: A novel series of [1,2,4,5]tetrazepino[6,7-b]indoles, Marine natural product Hyrtioreticuline C and D analogues, were synthesized via the reaction of 3-hydrazonoindolin-2-one with hydrzaonoyl chlorides in basic medium. </P><P> Results: The spectral data of the products proved their structure. All new derivatives were tested against two carcinoma cell lines ((A-549 & HepG2)) in comparison with the well-known anticancer standard drug (cisplatin) and two derivatives from the tested compounds showed activity more potent than the reference drug. </P><P> Conclusion: We succeeded in synthesis of new antitumor active azepinoindole alkaloids.
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Affiliation(s)
- Zeinab A. Muhammad
- National Organization for Drug Control and Research (NODCAR), P.O.Box 29, Cairo, Egypt
| | - Mohamed A.A. Radwan
- Applied Organic Chemistry Department, National Research Centre, Dokki, Giza, Egypt
| | - Thoraya A. Farghaly
- Department of Chemistry, Faculty of Science, Cairo University, Giza, 12613, Egypt
| | - Hatem M. Gaber
- National Organization for Drug Control and Research (NODCAR), P.O.Box 29, Cairo, Egypt
| | - Mahmuod M. Elaasser
- The Regional Center for Mycology and Biotechnology, Al-Azhar University, Cairo, Egypt
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21
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Della Sala G, Agriesti F, Mazzoccoli C, Tataranni T, Costantino V, Piccoli C. Clogging the Ubiquitin-Proteasome Machinery with Marine Natural Products: Last Decade Update. Mar Drugs 2018; 16:E467. [PMID: 30486251 PMCID: PMC6316072 DOI: 10.3390/md16120467] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 11/11/2018] [Accepted: 11/22/2018] [Indexed: 01/08/2023] Open
Abstract
The ubiquitin-proteasome pathway (UPP) is the central protein degradation system in eukaryotic cells, playing a key role in homeostasis maintenance, through proteolysis of regulatory and misfolded (potentially harmful) proteins. As cancer cells produce proteins inducing cell proliferation and inhibiting cell death pathways, UPP inhibition has been exploited as an anticancer strategy to shift the balance between protein synthesis and degradation towards cell death. Over the last few years, marine invertebrates and microorganisms have shown to be an unexhaustive factory of secondary metabolites targeting the UPP. These chemically intriguing compounds can inspire clinical development of novel antitumor drugs to cope with the incessant outbreak of side effects and resistance mechanisms induced by currently approved proteasome inhibitors (e.g., bortezomib). In this review, we report about (a) the role of the UPP in anticancer therapy, (b) chemical and biological properties of UPP inhibitors from marine sources discovered in the last decade, (c) high-throughput screening techniques for mining natural UPP inhibitors in organic extracts. Moreover, we will tell about the fascinating story of salinosporamide A, the first marine natural product to access clinical trials as a proteasome inhibitor for cancer treatment.
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Affiliation(s)
- Gerardo Della Sala
- Laboratory of Pre-Clinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Francesca Agriesti
- Laboratory of Pre-Clinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Carmela Mazzoccoli
- Laboratory of Pre-Clinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Tiziana Tataranni
- Laboratory of Pre-Clinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
| | - Valeria Costantino
- The NeaNat Group, Department of Pharmacy, University of Naples Federico II, via D. Montesano 49, 80131 Napoli, Italy.
| | - Claudia Piccoli
- Laboratory of Pre-Clinical and Translational Research, IRCCS-CROB, Referral Cancer Center of Basilicata, 85028 Rionero in Vulture, Italy.
- Department of Clinical and Experimental Medicine, University of Foggia, via L. Pinto c/o OO.RR., 71100 Foggia, Italy.
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22
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Li X, Elmira E, Rohondia S, Wang J, Liu J, Dou QP. A patent review of the ubiquitin ligase system: 2015-2018. Expert Opin Ther Pat 2018; 28:919-937. [PMID: 30449221 DOI: 10.1080/13543776.2018.1549229] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
INTRODUCTION Ubiquitin-proteasome system (UPS) has been validated as a novel anticancer drug target in the past 20 years. The UPS contains two distinct steps: ubiquitination of a substrate protein by ubiquitin activating enzyme (E1), ubiquitin conjugating enzyme (E2), and ubiquitin ligase (E3), and substrate degradation by the 26S proteasome complex. The E3 enzyme is the central player in the ubiquitination step and has a wide range of specific substrates in cancer cells, offering great opportunities for discovery and development of selective drugs. Areas covered: This review summarizes the recent advances in small molecule inhibitors of E1s, E2s, and E3s, with a focus on the latest patents (from 2015 to 2018) of E3 inhibitors and modulators. Expert opinion: One strategy to overcome limitations of current 20S proteasome inhibitors is to discover inhibitors of the upstream key components of the UPS, such as E3 enzymes. E3s play important roles in cancer development and determine the specificity of substrate ubiquitination, offering novel target opportunities. E3 modulators could be developed by rational design, natural compound or library screening, old drug repurposes, and application of other novel technologies. Further understanding of mechanisms of E3-substrate interaction will be essential for discovering and developing next-generation E3 inhibitors as effective anticancer drugs.
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Affiliation(s)
- Xin Li
- a Department of Biotechnology , Guangdong Polytechnic of Science and Trade , Guangzhou , Guangdong , China.,b Guangdong Province Key Laboratory for Green Processing of Natural Products and Product Safety, School of Food Science and Engineering , South China University of Technology , Guangzhou , Guangdong , China.,c Barbara Ann Karmanos Cancer Institute, and Departments of Oncology, Pharmacology and Pathology, School of Medicine , Wayne State University , Detroit , MI , USA
| | - Ekinci Elmira
- c Barbara Ann Karmanos Cancer Institute, and Departments of Oncology, Pharmacology and Pathology, School of Medicine , Wayne State University , Detroit , MI , USA
| | - Sagar Rohondia
- c Barbara Ann Karmanos Cancer Institute, and Departments of Oncology, Pharmacology and Pathology, School of Medicine , Wayne State University , Detroit , MI , USA
| | - Jicang Wang
- c Barbara Ann Karmanos Cancer Institute, and Departments of Oncology, Pharmacology and Pathology, School of Medicine , Wayne State University , Detroit , MI , USA.,d College of Animal Science and Technology , Henan University of Science and Technology , Luoyang , China
| | - Jinbao Liu
- e Protein Modification and Degradation Lab, School of Basic Medical Sciences , Affiliated Tumor Hospital of Guangzhou Medical University , Guangzhou , China
| | - Q Ping Dou
- c Barbara Ann Karmanos Cancer Institute, and Departments of Oncology, Pharmacology and Pathology, School of Medicine , Wayne State University , Detroit , MI , USA.,e Protein Modification and Degradation Lab, School of Basic Medical Sciences , Affiliated Tumor Hospital of Guangzhou Medical University , Guangzhou , China
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23
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Katsuki A, Kato H, Tahara Y, Hashimoto M, Fujii I, Tsukamoto S. pH-dependent production of himeic acid A and its non-enzymatic conversions to himeic acids B and C. Bioorg Med Chem 2018; 26:1869-1874. [PMID: 29486950 DOI: 10.1016/j.bmc.2018.02.034] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 02/19/2018] [Accepted: 02/19/2018] [Indexed: 10/18/2022]
Abstract
The fungus Aspergillus japonicus MF275 produces himeic acid A (1), containing a 4-pyrone ring, along with its congeners, himeic acids B (2) and C (3). During culture, 1 was gradually converted to 3, the corresponding 4-pyridone derivative. A study of the relationship between the culture pH and the fungal metabolites showed that a decrease from pH 6.5 to pH 2 is essential for production of 1, while a subsequent increase to pH 5 is necessary for production of 3. In addition, we revealed that 1 was non-enzymatically converted to 3 by the incorporation of an ammonium nitrogen atom in a pH 5 buffer, and that 1 was converted to 2 at a conversion ratio of 50% during incubation in MeOH for five days.
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Affiliation(s)
- Ayako Katsuki
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Hikaru Kato
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Yurika Tahara
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan
| | - Makoto Hashimoto
- School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan
| | - Isao Fujii
- School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate 028-3694, Japan
| | - Sachiko Tsukamoto
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto 862-0973, Japan.
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24
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Itoh Y, Suzuki M. Design, synthesis, and biological evaluation of novel ubiquitin-activating enzyme inhibitors. Bioorg Med Chem Lett 2018; 28:2723-2727. [PMID: 29548576 DOI: 10.1016/j.bmcl.2018.03.004] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Revised: 02/28/2018] [Accepted: 03/02/2018] [Indexed: 01/22/2023]
Abstract
Ubiquitin-activating enzyme (E1), which catalyzes the activation of ubiquitin in the initial step of the ubiquitination cascade, is a potential therapeutic target in multiple myeloma and breast cancer treatment. However, only a few E1 inhibitors have been reported to date. Moreover, there has been little medicinal chemistry research on the three-dimensional structure of E1. Therefore, in the present study, we attempted to identify novel E1 inhibitors using structure-based drug design. Following the rational design, synthesis, and in vitro biological evaluation of several such compounds, we identified a reversible E1 inhibitor (4b). Compound 4b increased p53 levels in MCF-7 breast cancer cells and inhibited their growth. These findings suggest that reversible E1 inhibitors are potential anticancer agents.
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Affiliation(s)
- Yukihiro Itoh
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamohangi-cho, Sakyo-ku, Kyoto 606-0823, Japan.
| | - Miki Suzuki
- Graduate School of Medical Science, Kyoto Prefectural University of Medicine, 1-5 Shimogamohangi-cho, Sakyo-ku, Kyoto 606-0823, Japan
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25
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Hashimoto M, Kato H, Katsuki A, Tsukamoto S, Fujii I. Identification of the Biosynthetic Gene Cluster for Himeic Acid A: A Ubiquitin-Activating Enzyme (E1) Inhibitor in Aspergillus japonicus MF275. Chembiochem 2018; 19:535-539. [PMID: 29314577 DOI: 10.1002/cbic.201700584] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2017] [Indexed: 11/09/2022]
Abstract
Himeic acid A, which is produced by the marine fungus Aspergillus japonicus MF275, is a specific inhibitor of the ubiquitin-activating enzyme E1 in the ubiquitin-proteasome system. To elucidate the mechanism of himeic acid biosynthesis, feeding experiments with labeled precursors have been performed. The long fatty acyl side chain attached to the pyrone ring is of polyketide origin, whereas the amide substituent is derived from leucine. These results suggest that a polyketide synthase-nonribosomal peptide synthase (PKS-NRPS) is involved in himeic acid biosynthesis. A candidate gene cluster was selected from the results of genome sequencing analysis. Disruption of the PKS-NRPS gene by Agrobacterium-mediated transformation confirms that HimA PKS-NRPS is involved in himeic acid biosynthesis. Thus, the him biosynthetic gene cluster for himeic acid in A. japonicus MF275 has been identified.
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Affiliation(s)
- Makoto Hashimoto
- School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan
| | - Hikaru Kato
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Ayako Katsuki
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Sachiko Tsukamoto
- Graduate School of Pharmaceutical Sciences, Kumamoto University, 5-1 Oe-honmachi, Kumamoto, 862-0973, Japan
| | - Isao Fujii
- School of Pharmacy, Iwate Medical University, 2-1-1 Nishitokuta, Yahaba, Iwate, 028-3694, Japan
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26
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Abstract
This review discusses various biological and chemical aspects of the non-monoterpenoid azepinoindole class of alkaloids, including their isolation, biosynthesis and total synthesis.
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Affiliation(s)
- Ashley C. Lindsay
- School of Chemical Sciences
- University of Auckland
- Auckland
- New Zealand
| | - Se Hun Kim
- School of Chemical Sciences
- University of Auckland
- Auckland
- New Zealand
| | - Jonathan Sperry
- School of Chemical Sciences
- University of Auckland
- Auckland
- New Zealand
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27
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Mayer AMS, Rodríguez AD, Taglialatela-Scafati O, Fusetani N. Marine Pharmacology in 2012-2013: Marine Compounds with Antibacterial, Antidiabetic, Antifungal, Anti-Inflammatory, Antiprotozoal, Antituberculosis, and Antiviral Activities; Affecting the Immune and Nervous Systems, and Other Miscellaneous Mechanisms of Action. Mar Drugs 2017; 15:md15090273. [PMID: 28850074 PMCID: PMC5618412 DOI: 10.3390/md15090273] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2017] [Revised: 08/17/2017] [Accepted: 08/21/2017] [Indexed: 12/23/2022] Open
Abstract
The peer-reviewed marine pharmacology literature from 2012 to 2013 was systematically reviewed, consistent with the 1998–2011 reviews of this series. Marine pharmacology research from 2012 to 2013, conducted by scientists from 42 countries in addition to the United States, reported findings on the preclinical pharmacology of 257 marine compounds. The preclinical pharmacology of compounds isolated from marine organisms revealed antibacterial, antifungal, antiprotozoal, antituberculosis, antiviral and anthelmitic pharmacological activities for 113 marine natural products. In addition, 75 marine compounds were reported to have antidiabetic and anti-inflammatory activities and affect the immune and nervous system. Finally, 69 marine compounds were shown to display miscellaneous mechanisms of action which could contribute to novel pharmacological classes. Thus, in 2012–2013, the preclinical marine natural product pharmacology pipeline provided novel pharmacology and lead compounds to the clinical marine pharmaceutical pipeline, and contributed significantly to potentially novel therapeutic approaches to several global disease categories.
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Affiliation(s)
- Alejandro M S Mayer
- Department of Pharmacology, Chicago College of Osteopathic Medicine, Midwestern University, 555 31st Street, Downers Grove, IL 60515, USA.
| | - Abimael D Rodríguez
- Molecular Sciences Research Center, University of Puerto Rico, 1390 Ponce de León Avenue, San Juan, PR 00926, USA.
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28
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Affiliation(s)
- George M. Burslem
- Departments of Molecular,
Cellular, and Developmental Biology, Chemistry, and Pharmacology, Yale University, 219 Prospect Street, New Haven, Connecticut 06511, United States
| | - Craig M. Crews
- Departments of Molecular,
Cellular, and Developmental Biology, Chemistry, and Pharmacology, Yale University, 219 Prospect Street, New Haven, Connecticut 06511, United States
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29
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Hawas UW, Abou El-Kassem LT, Abdelfattah MS, Elmallah MIY, Eid MAG, Monier M, Marimuthu N. Cytotoxic activity of alkyl benzoate and fatty acids from the red sea sponge Hyrtios erectus. Nat Prod Res 2017; 32:1369-1374. [PMID: 28669229 DOI: 10.1080/14786419.2017.1344662] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
The chemical investigation of the methylene chloride fraction of marine sponge Hyrtios erectus led to the isolation of the known oxysterol (2) along with a new alkyl benzoate compound identified by spectroscopic methods (NMR and MS) as 4'-methylheptyl benzoate (1), whilst the n-butanol fraction afforded the known indole 3-carbaldehyde and β-carboline derivatives. Moreover, the hexane fraction was analysed by GC-MS for their fatty acids (FAs). A total of 17 FAs with chain lengths between 14 and 25 carbons were identified. Methyl-branched FAs are predominated suggesting the presence of bacterial symbionts in the H. erectus sponge. Furthermore, compounds 1 and 2 displayed significant cytotoxicity against breast adenocarcinoma (MCF-7) with IC50 values of 2.4 and 3.8 μM, respectively, since compound 2 was also shown to have potent cytotoxic effect against hepatocellular carcinoma cells (HepG 2) with IC50 value of 1.3 μM.
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Affiliation(s)
- Usama W Hawas
- a Faculty of Marine Sciences, Marine Chemistry Department , King Abdulaziz University , Jeddah , Saudi Arabia.,b Phytochemistry and Plant Systematic Department , National Research Centre , Cairo , Egypt
| | | | - Mohamed S Abdelfattah
- d Faculty of Science, Marine Natural Products Research Unit , Helwan University , Cairo , Egypt
| | - Mohammed I Y Elmallah
- d Faculty of Science, Marine Natural Products Research Unit , Helwan University , Cairo , Egypt
| | - Mennat Allah G Eid
- d Faculty of Science, Marine Natural Products Research Unit , Helwan University , Cairo , Egypt
| | - Marwa Monier
- c Pharmacognosy Department , National Research Centre , Cairo , Egypt
| | - N Marimuthu
- e Faculty of Marine Sciences, Marine Biology Department , King Abdul Aziz University , Jeddah , Saudi Arabia.,f Zoological Survey of India (Ministry of Environment, Forest and Climate Change, Govt. of India) , FPS Building, Indian Museum Complex, Kolkata , India
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30
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Shady NH, El-Hossary EM, Fouad MA, Gulder TAM, Kamel MS, Abdelmohsen UR. Bioactive Natural Products of Marine Sponges from the Genus Hyrtios. Molecules 2017; 22:E781. [PMID: 28492499 PMCID: PMC6153753 DOI: 10.3390/molecules22050781] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Revised: 04/28/2017] [Accepted: 05/08/2017] [Indexed: 02/06/2023] Open
Abstract
Marine sponges are known as a rich source for novel bioactive compounds with valuable pharmacological potential. One of the most predominant sponge genera is Hyrtios, reported to have various species such as Hyrtios erectus, Hyrtios reticulatus, Hyrtios gumminae, Hyrtios communis, and Hyrtios tubulatus and a number of undescribed species. Members of the genus Hyrtios are a rich source of natural products with diverse and valuable biological activities, represented by different chemical classes including alkaloids, sesterterpenes and sesquiterpenes. This review covers the literature until June 2016, providing a complete survey of all compounds isolated from the genus Hyrtios with their corresponding biological activities whenever applicable.
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Affiliation(s)
- Nourhan Hisham Shady
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone, P.O. Box 61111 New Minia City, Minia, Egypt.
| | - Ebaa M El-Hossary
- National Centre for Radiation Research & Technology, Egyptian Atomic Energy Authority, Ahmed El-Zomor St. 3, El-Zohoor Dist., P.O. Box 29 Nasr City, Cairo, Egypt.
| | - Mostafa A Fouad
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt.
| | - Tobias A M Gulder
- Department of Chemistry and Center for Integrated Protein Science Munich (CIPSM), Technische Universität München, Lichtenbergstraβe 4, 85748 Garching, Germany.
| | - Mohamed Salah Kamel
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt.
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University, 61519 Minia, Egypt.
- Department of Botany II, Julius-von-Sachs Institute for Biological Sciences, University of Würzburg, Julius-von-Sachs-Platz 3, 97082 Würzburg, Germany.
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Abe T, Yamada K. Concise Syntheses of Hyrtioreticulins C and D via a C-4 Pictet-Spengler Reaction: Revised Signs of Specific Rotations. JOURNAL OF NATURAL PRODUCTS 2017; 80:241-245. [PMID: 28134528 DOI: 10.1021/acs.jnatprod.7b00008] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The first syntheses of hyrtioreticulins C and D via a Pictet-Spengler reaction at the C-4 position of the indole rings are described. The synthesis proceeds in only two steps from commercially available starting materials. In this Communication, the structures of the natural products were confirmed. Furthermore, we revise the signs of the specific rotations of hyrtioreticulins C and D.
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Affiliation(s)
- Takumi Abe
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293, Japan
| | - Koji Yamada
- Faculty of Pharmaceutical Sciences, Health Sciences University of Hokkaido , Ishikari-tobetsu, Hokkaido 0610293, Japan
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Mioso R, Marante FJT, Bezerra RDS, Borges FVP, Santos BVDO, Laguna IHBD. Cytotoxic Compounds Derived from Marine Sponges. A Review (2010-2012). Molecules 2017; 22:E208. [PMID: 28134844 PMCID: PMC6155849 DOI: 10.3390/molecules22020208] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 01/11/2017] [Accepted: 01/17/2017] [Indexed: 12/20/2022] Open
Abstract
Abstract: This extensive review covers research published between 2010 and 2012 regarding new compounds derived from marine sponges, including 62 species from 60 genera belonging to 33 families and 13 orders of the Demospongia class (Porifera). The emphasis is on the cytotoxic activity that bioactive metabolites from sponges may have on cancer cell lines. At least 197 novel chemical structures from 337 compounds isolated have been found to support this work. Details on the source and taxonomy of the sponges, their geographical occurrence, and a range of chemical structures are presented. The compounds discovered from the reviewed marine sponges fall into mainly four chemical classes: terpenoids (41.9%), alkaloids (26.2%), macrolides (8.9%) and peptides (6.3%) which, along with polyketides, sterols, and others show a range of biological activities. The key sponge orders studied in the reviewed research were Dictyoceratida, Haplosclerida, Tetractinellida, Poecilosclerida, and Agelasida. Petrosia, Haliclona (Haplosclerida), Rhabdastrella (Tetractinellida), Coscinoderma and Hyppospongia (Dictyioceratida), were found to be the most promising genera because of their capacity for producing new bioactive compounds. Several of the new compounds and their synthetic analogues have shown in vitro cytotoxic and pro-apoptotic activities against various tumor/cancer cell lines, and some of them will undergo further in vivo evaluation.
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Affiliation(s)
- Roberto Mioso
- Laboratory of Enzymology - LABENZ, Department of Biochemistry, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil.
| | - Francisco J Toledo Marante
- Department of Chemistry, University of Las Palmas de Gran Canaria, Las Palmas de Gran Canaria 35017, Spain.
| | - Ranilson de Souza Bezerra
- Laboratory of Enzymology - LABENZ, Department of Biochemistry, Federal University of Pernambuco, Recife 50670-901, Pernambuco, Brazil.
| | - Flávio Valadares Pereira Borges
- Post-Graduation Program in Natural Products and Synthetic Bioactives, Federal University of Paraíba, João Pessoa 58051-970, Paraíba, Brazil.
| | - Bárbara V de Oliveira Santos
- Post-Graduation Program in Development and Technological Innovation in Medicines, Department of Pharmaceutical Sciences, Federal University of Paraiba, João Pessoa 58051-900, Paraíba, Brazil.
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Kubota T, Nakamura K, Sakai K, Fromont J, Gonoi T, Kobayashi J. Hyrtinadines C and D, New Azepinoindole-Type Alkaloids from a Marine Sponge Hyrtios sp. Chem Pharm Bull (Tokyo) 2017; 64:975-8. [PMID: 27373657 DOI: 10.1248/cpb.c16-00201] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
New bisindole alkaloids, hyrtinadines C (1) and D (2), have been isolated from an Okinawan marine sponge Hyrtios sp. The structures of hyrtinadines C (1) and D (2) were elucidated based on analyses of the spectral data. Hyrtinadines C (1) and D (2) were the relatively rare alkaloids possessing a 3,4-fused azepinoindole skeleton. Hyrtinadines C (1) and D (2) showed antimicrobial activity.
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Meng TZ, Shi XX, Qu HY, Zhang Y, Huang ZS, Fan QQ. Highly diastereoselective crystallization-induced asymmetric transformation of 1,3-disubstituted-tetrahydro-β-carbolines in water. RSC Adv 2017. [DOI: 10.1039/c7ra08811f] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
A green and highly stereoselective method for the synthesis of cis or trans-1,3-disubstituted-tetrahydro-β-carbolines has been developed using water as the solvent.
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Affiliation(s)
- Tian-Zhuo Meng
- Department of Pharmaceutical Engineering
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Xiao-Xin Shi
- Department of Pharmaceutical Engineering
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Hui-Ya Qu
- Department of Pharmaceutical Engineering
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Yi Zhang
- Department of Pharmaceutical Engineering
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Zhong-Shou Huang
- Department of Pharmaceutical Engineering
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
| | - Qi-Qi Fan
- Department of Pharmaceutical Engineering
- School of Pharmacy
- East China University of Science and Technology
- Shanghai 200237
- P. R. China
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Tsukamoto S. Search for Inhibitors of the Ubiquitin-Proteasome System from Natural Sources for Cancer Therapy. Chem Pharm Bull (Tokyo) 2016; 64:112-8. [PMID: 26833439 DOI: 10.1248/cpb.c15-00768] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Since the approval of the proteasome inhibitor, Velcade(®), by the Food and Drug Administration (FDA) for the treatment of relapsed multiple myeloma, inhibitors of the ubiquitin-proteasome system have been attracting increasing attention as promising drug leads for cancer therapy. While the development of drugs for diseases related to this proteolytic system has mainly been achieved by searching libraries of synthetic small molecules or chemical modifications to drug leads, limited searches have been conducted on natural sources. We have been searching natural sources for inhibitors that target this proteolytic system through in-house screening. Our recent studies on the search for natural inhibitors of the ubiquitin-proteasome system, particularly, inhibitors against the proteasome, E1 enzyme (Uba1), E2 enzyme (Ubc13-Uev1A heterodimer), and E3 enzyme (Hdm2), and also those against deubiquitinating enzyme (USP7), are reviewed here.
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New marine natural products from sponges (Porifera) of the order Dictyoceratida (2001 to 2012); a promising source for drug discovery, exploration and future prospects. Biotechnol Adv 2016; 34:473-491. [PMID: 26802363 DOI: 10.1016/j.biotechadv.2015.12.008] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2015] [Revised: 12/15/2015] [Accepted: 12/17/2015] [Indexed: 10/22/2022]
Abstract
The discovery of new drugs can no longer rely primarily on terrestrial resources, as they have been heavily exploited for over a century. During the last few decades marine sources, particularly sponges, have proven to be a most promising source of new natural products for drug discovery. This review considers the order Dictyoceratida in the Phylum Porifera from which the largest number of new marine natural products have been reported over the period 2001-2012. This paper examines all the sponges from the order Dictyoceratida that were reported as new compounds during the time period in a comprehensive manner. The distinctive physical characteristics and the geographical distribution of the different families are presented. The wide structural diversity of the compounds produced and the variety of biological activities they exhibited is highlighted. As a representative of sponges, insights into this order and avenues for future effective natural product discovery are presented. The research institutions associated with the various studies are also highlighted with the aim of facilitating collaborative relationships, as well as to acknowledge the major international contributors to the discovery of novel sponge metabolites. The order Dictyoceratida is a valuable source of novel chemical structures which will continue to contribute to a new era of drug discovery.
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Abstract
The ubiquitin–proteasome system has been recognized as fundamental toward protein turnover in eukaryotic cells. The system comprises the ubiquitin conjugation machinery consisting of an enzyme cascade of E1, E2, and E3 enzymes, the deubiquitinases (DUBs) and the proteasome, a multisubunit protease complex acting through an N-terminal threonine protease mechanism. A number of natural product inhibitors of the proteasome have been studied in detail and these inhibitors and their derivatives have been highly valuable in developing our understanding of this system. These efforts culminated in the successful development of bortezomib as a pharmacological agent used clinically as a cancer therapeutic in the treatment of multiple myeloma. This review is focused on natural product inhibitors of the enzymes involved in intracellular ubiquitin conjugation (ubiquitin-activating enzyme E1, ubiquitin-conjugating enzyme E2, ubiquitin ligase E3) and ubiquitin deconjugation (DUBs). Members of both of these enzyme systems have been proposed as pharmacological targets for cancer therapy and several other diseases. Furthermore compounds with activities toward enzymes from the analogous ubiquitin-like (Ubl) protein families have been identified for SUMO and NEDD8. To date natural product inhibitors have been described for members of each of these protein families and were isolated from plant, fungal, animal, and microbial sources. Insights into the mechanism of action of natural products and their derivatives will enhance our understanding of this complex system and will improve our ability to rationally design novel inhibitors. The increased availability of assays and research tools for the study of protein ubiquitination, deubiquitination, and Ubl proteins will contribute to the discovery of more potent and selective compounds. We expect that these studies will stimulate development of further potential pharmacological agents in this area.
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Abstract
Marine indole alkaloids comprise a large and steadily growing group of secondary metabolites. Their diverse biological activities make many compounds of this class attractive starting points for pharmaceutical development. Several marine-derived indoles were found to possess cytotoxic, antineoplastic, antibacterial and antimicrobial activities, in addition to the action on human enzymes and receptors. The newly isolated indole alkaloids of marine origin since the last comprehensive review in 2003 are reported, and biological aspects will be discussed.
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Affiliation(s)
- Natalie Netz
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany.
| | - Till Opatz
- Institute of Organic Chemistry, Johannes Gutenberg-University Mainz, Duesbergweg 10-14, 55128 Mainz, Germany.
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A Survey of Marine Natural Compounds and Their Derivatives with Anti-cancer Activity Reported in 2012. Molecules 2015; 20:7097-142. [PMID: 25903364 PMCID: PMC6272635 DOI: 10.3390/molecules20047097] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2015] [Revised: 04/01/2015] [Accepted: 04/03/2015] [Indexed: 12/15/2022] Open
Abstract
Although considerable effort and progress has been made in the search for new anticancer drugs and treatments in the last several decades, cancer remains a major public health problem and one of the major causes of death worldwide. Many sources, including plants, animals, and minerals, are of interest in cancer research because of the possibility of identifying novel molecular therapeutics. Moreover, structure-activity-relationship (SAR) investigations have become a common way to develop naturally derived or semi-synthetic molecular analogues with improved efficacy and decreased toxicity. In 2012, approximately 138 molecules from marine sources, including isolated compounds and their associated analogues, were shown to be promising anticancer drugs. Among these, 62% are novel compounds. In this report, we review the marine compounds identified in 2012 that may serve as novel anticancer drugs.
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Liu J, Shaik S, Dai X, Wu Q, Zhou X, Wang Z, Wei W. Targeting the ubiquitin pathway for cancer treatment. Biochim Biophys Acta Rev Cancer 2014; 1855:50-60. [PMID: 25481052 DOI: 10.1016/j.bbcan.2014.11.005] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 11/24/2014] [Accepted: 11/25/2014] [Indexed: 12/15/2022]
Abstract
Proteasome-mediated degradation is a common mechanism by which cells renew their intracellular proteins and maintain protein homeostasis. In this process, the E3 ubiquitin ligases are responsible for targeting specific substrates (proteins) for ubiquitin-mediated degradation. However, in cancer cells, the stability and the balance between oncoproteins and tumor suppressor proteins are disturbed in part due to deregulated proteasome-mediated degradation. This ultimately leads to either stabilization of oncoprotein(s) or increased degradation of tumor suppressor(s), contributing to tumorigenesis and cancer progression. Therefore, E3 ubiquitin ligases including the SCF types of ubiquitin ligases have recently evolved as promising therapeutic targets for the development of novel anti-cancer drugs. In this review, we highlighted the critical components along the ubiquitin pathway including E1, E2, various E3 enzymes and DUBs that could serve as potential drug targets and also described the available bioactive compounds that target the ubiquitin pathway to control various cancers.
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Affiliation(s)
- Jia Liu
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Shavali Shaik
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Xiangpeng Dai
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA
| | - Qiong Wu
- Department of Medical Oncology, First Affiliated Hospital of Bengbu Medical College, Bengbu, Anhui 233004, China
| | - Xiuxia Zhou
- The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology, The First Affiliated Hospital, Soochow University, Suzhou 215123, China
| | - Zhiwei Wang
- The Cyrus Tang Hematology Center and Collaborative Innovation Center of Hematology, Jiangsu Institute of Hematology, The First Affiliated Hospital, Soochow University, Suzhou 215123, China.
| | - Wenyi Wei
- Department of Pathology, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, MA 02215, USA.
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42
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Isolation, structure determination and cytotoxicity studies of tryptophan alkaloids from an Australian marine sponge Hyrtios sp. Bioorg Med Chem Lett 2014; 24:3329-32. [DOI: 10.1016/j.bmcl.2014.05.104] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2014] [Revised: 05/28/2014] [Accepted: 05/29/2014] [Indexed: 11/24/2022]
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He WF, Xue DQ, Yao LG, Li JY, Li J, Guo YW. Hainanerectamines A-C, alkaloids from the Hainan sponge Hyrtios erecta. Mar Drugs 2014; 12:3982-93. [PMID: 24983641 PMCID: PMC4113810 DOI: 10.3390/md12073982] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2014] [Revised: 05/28/2014] [Accepted: 06/03/2014] [Indexed: 11/16/2022] Open
Abstract
Two new indole alkaloids, hainanerectamines A (1) and B (2), and one new β-carboline alkaloids, hainanerectamines C (4), along with five known related alkaloids (3, 5-8), have been isolated from the Hainan marine sponge Hyrtios erecta. The structures of new compounds 1, 2 and 4 were determined by detailed analysis of their 1D and 2D NMR spectra and by comparison of their spectroscopic data with those of related model compounds. Compounds 2-4 exhibited moderate inhibitory activity against Aurora A, a member of serine/threonine kinase family involving in the regulation of cell division and a new target in cancer treatment, with IC50 values of 24.5, 13.6, and 18.6 μg/mL, respectively.
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Affiliation(s)
- Wen-Fei He
- School of Pharmaceutical Sciences, Wenzhou Medical University, Wenzhou 325035, China.
| | - Duo-Qing Xue
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Li-Gong Yao
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Jing-Ya Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Jia Li
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
| | - Yue-Wei Guo
- State Key Laboratory of Drug Research, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai 201203, China.
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El-Desoky AH, Kato H, Eguchi K, Kawabata T, Fujiwara Y, Losung F, Mangindaan REP, de Voogd NJ, Takeya M, Yokosawa H, Tsukamoto S. Acantholactam and pre-neo-kauluamine, manzamine-related alkaloids from the Indonesian marine sponge Acanthostrongylophora ingens. JOURNAL OF NATURAL PRODUCTS 2014; 77:1536-1540. [PMID: 24902064 DOI: 10.1021/np500290a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Two new manzamine alkaloids, acantholactam (3) and pre-neo-kauluamine (4), were isolated from the marine sponge Acanthostrongylophora ingens along with manzamine A (1) and neo-kauluamine (2). Acantholactam contains a γ-lactam ring N-substituted with a (Z)-2-hexenoic acid moiety and is proposed to be biosynthetically derived from manzamine A by oxidative cleavage of the eight-membered ring. Compound 4 was converted to the dimer 2 during storage, suggesting nonenzymatic dimer formation. Among the four isolated compounds, 1, 2, and 4 showed proteasome inhibitory activity.
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Affiliation(s)
- Ahmed H El-Desoky
- Graduate School of Pharmaceutical Sciences, Kumamoto University , Oe-honmachi 5-1, Kumamoto 862-0973, Japan
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45
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Park EJ, Shen L, Sun D, Pezzuto JM. Inhibitory effect of a callophycin A derivative on iNOS expression via inhibition of Akt in lipopolysaccharide-stimulated RAW 264.7 cells. JOURNAL OF NATURAL PRODUCTS 2014; 77:527-35. [PMID: 24299616 PMCID: PMC4043953 DOI: 10.1021/np400800h] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
In previous studies, (R)-2-isobutyl 3-methyl 3,4-dihydro-1H-pyrido[3,4-b]indole-2,3(9H)-dicarboxylate (1), a callophycin A derivative, was found to strongly inhibit nitrite production in lipopolysaccharide (LPS)-stimulated RAW 264.7 cells, while (R)- or (S)-callophycin A showed only weak inhibition. We currently report additional studies to define the mechanisms underlying the inhibitory action of 1. Expression of inducible nitric oxide synthase (iNOS) was reduced at both protein and mRNA levels. Major upstream signaling molecules and transcription factors regulating iNOS expression were examined, but it was found that 1 did not affect the phosphorylated and total protein levels of p38 mitogen-activated protein kinase (p38 MAPK), Jun N-terminal kinase (JNK), extracellular signal-regulated kinase 1/2 (ERK1/2), and signal transducer and activator of transcription 1 (STAT1), nor did it mediate the degradation of the inhibitor of nuclear factor-κB α-isoform (IκBα). However, starting at early time points, 1 consistently inhibited the phosphorylation of protein kinase B/Akt at serine 473. In addition, 1 suppressed the protein expression of octamer-binding transcription factor-2 (Oct-2) and the expression of microRNA 155 (miR-155). In sum, compound 1 inhibits LPS-induced nitrite production by a unique and complex mechanism. Reduction of iNOS expression is accompanied by inhibition of Akt activation, Oct-2 protein expression, and miR-155 expression.
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Affiliation(s)
- Eun-Jung Park
- The Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Li Shen
- The Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - Dianqing Sun
- The Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
| | - John M. Pezzuto
- The Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, Hilo, Hawaii 96720, United States
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46
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Abstract
This review covers the literature published in 2012 for marine natural products, with 1035 citations (673 for the period January to December 2012) referring to compounds isolated from marine microorganisms and phytoplankton, green, brown and red algae, sponges, cnidarians, bryozoans, molluscs, tunicates, echinoderms, mangroves and other intertidal plants and microorganisms. The emphasis is on new compounds (1241 for 2012), together with the relevant biological activities, source organisms and country of origin. Biosynthetic studies, first syntheses, and syntheses that lead to the revision of structures or stereochemistries, have been included.
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Affiliation(s)
- John W Blunt
- Department of Chemistry, University of Canterbury, Christchurch, New Zealand.
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47
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Tsukamoto S, Yamakuma M, Kato H, Matsuo K, H. El-Desoky A, Kawabata T, Losung F, E. P. Mangindaan R, J. de Voogd N, Yokosawa H. 1-Hydroxyethylhalenaquinone: A New Proteasome Inhibitor from the Marine Sponge Xestospongia sp. HETEROCYCLES 2014. [DOI: 10.3987/com-14-13087] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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48
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Tanaka N, Momose R, Takahashi-Nakaguchi A, Gonoi T, Fromont J, Kobayashi J. Hyrtimomines, indole alkaloids from Okinawan marine sponges Hyrtios spp. Tetrahedron 2014. [DOI: 10.1016/j.tet.2013.12.032] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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50
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Wang XZ, Wu FH, Qu W, Liang JY. A new β-carboline alkaloid from the seeds of Griffonia simplicifolia. Chin J Nat Med 2013; 11:401-5. [PMID: 23845550 DOI: 10.1016/s1875-5364(13)60059-x] [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: 03/29/2012] [Indexed: 11/19/2022]
Abstract
AIM To study the chemical constituents from the seeds of Griffonia simplicifolia Baill. METHODS The chemical constituents were isolated and purified by a combination of chromatographic materials including silica gel, Sephadex LH-20, and preparative TLC. Their structures were elucidated on the basis of MS and NMR data analysis. The cytotoxic activities were evaluated against HepG2 cancer cell line using the MTT colorimetric method. RESULTS A new β-carboline alkaloid, griffonine (1), together with seven known alkaloids, hyrtioerectine B (2), 3-carboxy-6-hydroxy-β-carboline (3), hyrtiosulawesine (4), 5-hydroxyindole-3-carbaldehyde (5), 5-hydroxy-3-(2-hydroxyethyl) indole (6), trigonelline (7), and 5-hydroxytryptamine (8) were isolated and identified. Alkaloids 1, 2 and 4 showed growth inhibitory effects on the HepG2 cell line with IC50 values of 23.5, 9.6 and 19.3 μmol·L(-1), respectively. CONCLUSION Alkaloid 1 is new and was named griffonine. Alkaloids 2-7 were isolated from this plant for the first time. Alkaloids 1, 2 and 4 were potentially cytotoxic.
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Affiliation(s)
- Xin-Zhi Wang
- Department of Natural Medicinal Chemistry, China Pharmaceutical University, Nanjing 210009, China
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