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Sun S, He X, Yang J, Wang X, Li S. Facile Synthesis and First Antifungal Exploration of Tetracyclic Meroterpenoids: (+)-Aureol, (-)-Pelorol, and Its Analogs. JOURNAL OF NATURAL PRODUCTS 2024; 87:1092-1102. [PMID: 38557062 DOI: 10.1021/acs.jnatprod.4c00037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/04/2024]
Abstract
As an important bioactive molecular backbone, drimane meroterpenoids have drawn a great deal of attention from both pharmacologists and chemists. Inspired by the prevalidated success of conformational restriction in the discovery of novel pharmaceutical leads, two distinct tetracyclic drimane meroterpenoids, (-)-pelorol and (+)-aureol, were synthesized from the inexpensive starting material (-)-sclareol through 10 and 8 steps with 5.6% and 5.4% overall yield, respectively. The mild conditions, operational facility, and scalability enabled the expedient synthesis and biological exploration of not only natural products themselves but also their mimics. The first agrochemical exploration showed (-)-pelorol and (+)-aureol possessed good antifungal activity against Rhizoctonia solani, with EC50 values of 7.7 and 6.9 μM, respectively. This revealed that tetracyclic drimane meroterpenoids are valuable models for antifungal lead discovery.
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Affiliation(s)
- Shengxin Sun
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Xiaodan He
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Juan Yang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Xia Wang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Shengkun Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
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2
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Meyer ST, Fernandes S, Anderson RE, Pacherille A, Toms B, Kerr WG, Chisholm JD. Structure-Activity Studies on Bis-Sulfonamide SHIP1 Activators. Molecules 2023; 28:8048. [PMID: 38138538 PMCID: PMC10745928 DOI: 10.3390/molecules28248048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2023] [Revised: 12/07/2023] [Accepted: 12/10/2023] [Indexed: 12/24/2023] Open
Abstract
The SH2-containing inositol polyphosphate 5-phosphatase 1 (SHIP1) enzyme opposes the activity of PI3K and therefore is of interest in the treatment of inflammatory disorders. Recent results also indicate that SHIP1 promotes phagolysosomal degradation of lipids by microglia, suggesting that the enzyme may be a target for the treatment of Alzheimer's disease. Therefore, small molecules that increase SHIP1 activity may have benefits in these areas. Recently we discovered a bis-sulfonamide that increases the enzymatic activity of SHIP1. A series of similar SHIP1 activators have been synthesized and evaluated to determine structure-activity relationships and improve in vivo stability. Some new analogs have now been found with improved potency. In addition, both the thiophene and the thiomorpholine in the parent structure can be replaced by groups without a low valent sulfur atom, which provides a way to access activators that are less prone to oxidative degradation.
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Affiliation(s)
- Shea T. Meyer
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
| | - Sandra Fernandes
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | | | - Angela Pacherille
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
| | - Bonnie Toms
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | - William G. Kerr
- Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY 13210, USA
| | - John D. Chisholm
- Department of Chemistry, Syracuse University, Syracuse, NY 13244, USA
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3
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Sun S, Wang X, Csuk R, Li S. Practical Synthesis and Antifungal Investigation of Drimane Meroterpenoids Enabled by Nickel-Catalyzed Decarboxylative Coupling. JOURNAL OF NATURAL PRODUCTS 2023; 86:1420-1427. [PMID: 37226456 DOI: 10.1021/acs.jnatprod.3c00100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Drimane meroterpenoids have drawn increasing attention in the discovery of novel pharmaceutical leads owing to their structural diversity and bioactivity variation, but further development is significantly impeded by the lack of an efficient modular route of preparation. A nickel-catalyzed decarboxylative cross-coupling paradigm has been established to expeditiously access a constellation of drimane meroterpenoids. The redox-active drimane precursor is a bench-stable coupling partner and is easily available from the inexpensive feedstock sclareol. This transformation features the tolerance of challenging functional groups (phenol, aldehyde, ester, etc.) and mild conditions with a low-cost nickel catalytic system. The synthetic utility is further highlighted by the direct scalable synthesis of challenging drimane meroterpenoids as diversifiable advanced intermediates for late-stage functionalizations. This method facilitated antifungal investigations and culminated in the discovery of compounds C8 and C3 as new antifungal leads against Rhizoctonia solani, with EC50 values of 4.9 and 7.2 μM, respectively.
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Affiliation(s)
- Shengxin Sun
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
| | - Xia Wang
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing, 210095, China
| | - René Csuk
- Organic Chemistry, Martin-Luther-University Halle-Wittenberg, Kurt-Mothes-Straße 2, D-06120 Halle (Saale), Germany
| | - Shengkun Li
- National Key Laboratory of Green Pesticide, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Center for R&D of Fine Chemicals of Guizhou University, Guiyang, 550025, China
- Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing, 210095, China
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4
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Zachmann R, Yahata K, Holzheimer M, Jarret M, Wirtz C, Fürstner A. Total Syntheses of Nominal and Actual Prorocentin. J Am Chem Soc 2023; 145:2584-2595. [PMID: 36652728 PMCID: PMC9896551 DOI: 10.1021/jacs.2c12529] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The dinoflagellate-derived polyether prorocentin is a co-metabolite of the archetypical serine/threonine phosphatase inhibitor okadaic acid. Whereas a structural relationship cannot be missed and a biosynthetic link was proposed, it is currently unknown whether there is any parallel in the bioactivity profile of these natural products. However, it was insinuated in the past that the structure assigned to prorocentin might need to be revised. Indeed, re-examination of the published spectra cast doubts as to the constitution of the fused/spirotricyclic BCD-ring system in the core. To clarify this issue, a flexible synthesis blueprint was devised that allowed us to obtain the originally proposed structure as well as the most plausible amended structure. The key to success was late-stage gold-catalyzed spirocyclization reactions that furnished the isomeric central segments with excellent selectivity. The lexicon of catalytic transformations used to make the required cyclization precursors comprised a titanium-mediated ester methylenation/metathesis cascade, a rare example of a gold-catalyzed allylic substitution, and chain extensions via organocatalytic asymmetric aldehyde propargylation. A wing sector to be attached to the isomeric cores was obtained by Krische allylation, followed by a superbly selective cobalt-catalyzed oxidative cyclization of the resulting di-unsaturated alcohol with the formation of a 2,5-trans-disubstituted tetrahydrofuran; the remaining terminal alkene was elaborated into an appropriate handle for fragment coupling by platinum-catalyzed asymmetric diboration/oxidation. The assembly of the different building blocks to the envisaged isomeric target compounds proved that the structure of prorocentin needs to be revised as disclosed herein.
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Sudan R, Fernandes S, Srivastava N, Pedicone C, Meyer ST, Chisholm JD, Engelman RW, Kerr WG. LRBA Deficiency Can Lead to Lethal Colitis That Is Diminished by SHIP1 Agonism. Front Immunol 2022; 13:830961. [PMID: 35603158 PMCID: PMC9116273 DOI: 10.3389/fimmu.2022.830961] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 04/07/2022] [Indexed: 12/12/2022] Open
Abstract
Humans homozygous for inactivating LRBA (lipopolysaccharide (LPS)-responsive beige-like anchor) mutations or with compound heterozygous mutations exhibit a spectrum of immune-related pathologies including inflammatory bowel disease (IBD). The cause of this pathology remains undefined. Here we show that disruption of the colon epithelial barrier in LRBA-deficient mice by dextran sulfate sodium (DSS) consumption leads to severe and uniformly lethal colitis. Analysis of bone marrow (BM) chimeras showed that susceptibility to lethal colitis is primarily due to LRBA deficiency in the immune compartment and not the gut epithelium. Further dissection of the immune defect in LRBA-deficient hosts showed that LRBA is essential for the expression of CTLA4 by Treg cells and IL22 and IL17 expression by ILC3 cells in the large intestine when the gut epithelium is compromised by DSS. We further show that SHIP1 agonism partially abrogates the severity and lethality of DSS-mediated colitis. Our findings indicate that enteropathy induced by LRBA deficiency has multiple causes and that SHIP1 agonism can partially abrogate the inflammatory milieu in the gut of LRBA-deficient hosts.
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Affiliation(s)
- Raki Sudan
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Sandra Fernandes
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Neetu Srivastava
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Chiara Pedicone
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, United States
| | - Shea T Meyer
- Department of Chemistry, Syracuse University, Syracuse, NY, United States
| | - John D Chisholm
- Department of Chemistry, Syracuse University, Syracuse, NY, United States
| | - Robert W Engelman
- Department of Pathology and Cell Biology, University of South Florida, Tampa, FL, United States.,Department of Pediatrics, University of South Florida, Tampa, FL, United States.,H. Lee Moffitt Comprehensive Cancer Center & Research Institute, University of South Florida, Tampa, FL, United States
| | - William G Kerr
- Department of Microbiology and Immunology, SUNY Upstate Medical University, Syracuse, NY, United States.,Department of Chemistry, Syracuse University, Syracuse, NY, United States
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Dactylospongia elegans—A Promising Drug Source: Metabolites, Bioactivities, Biosynthesis, Synthesis, and Structural-Activity Relationship. Mar Drugs 2022; 20:md20040221. [PMID: 35447894 PMCID: PMC9033123 DOI: 10.3390/md20040221] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 03/17/2022] [Accepted: 03/22/2022] [Indexed: 02/07/2023] Open
Abstract
Marine environment has been identified as a huge reservoir of novel biometabolites that are beneficial for medical treatments, as well as improving human health and well-being. Sponges have been highlighted as one of the most interesting phyla as new metabolites producers. Dactylospongia elegans Thiele (Thorectidae) is a wealth pool of various classes of sesquiterpenes, including hydroquinones, quinones, and tetronic acid derivatives. These metabolites possessed a wide array of potent bioactivities such as antitumor, cytotoxicity, antibacterial, and anti-inflammatory. In the current work, the reported metabolites from D. elegans have been reviewed, including their bioactivities, biosynthesis, and synthesis, as well as the structural-activity relationship studies. Reviewing the reported studies revealed that these metabolites could contribute to new drug discovery, however, further mechanistic and in vivo studies of these metabolites are needed.
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7
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Cheng YF, Li HJ, Wang XB, Wu YC. Concise synthesis of marine natural products smenodiol and (-)-pelorol. Nat Prod Res 2022; 37:1505-1510. [PMID: 35014568 DOI: 10.1080/14786419.2021.2023871] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
A facile synthesis of marine natural product smenodiol has been achieved in 23.2% overall yield within 8 steps from readily available starting materials, which facilitates a concise synthesis of the marine natural product (-)-pelorol by employing a TMSOTf-mediated Friedel-Crafts reaction with a methyl ester in the aryl as the key step.
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Affiliation(s)
- Yun-Fei Cheng
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai, P. R. China
| | - Hui-Jing Li
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai, P. R. China.,Weihai Huiankang Biotechnology Co., Ltd, Weihai, P. R. China
| | - Xiao-Bo Wang
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai, P. R. China
| | - Yan-Chao Wu
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai, P. R. China
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8
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Li XS, Kong X, Wang CT, Niu ZJ, Wei WX, Liu HC, Zhang Z, Li Y, Liang YM. Lewis-Acid-Catalyzed Tandem Cyclization by Ring Expansion of Tertiary Cycloalkanols with Propargyl Alcohols. Org Lett 2021; 23:9457-9462. [PMID: 34859669 DOI: 10.1021/acs.orglett.1c03621] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A new method for the efficient synthesis of hexahydro-1H-fluorene and octahydrobenzo[a]azulene derivatives through a ring-expansion strategy is reported. With an appropriate combination of thulium(III) trifluoromethanesulfonate and 13X molecular sieves, a range of unsaturated polycyclic compounds were obtained in good yields. Mechanism studies reveal that the reaction is more likely to undergo Meyer-Schuster rearrangement, ring expansion, and Friedel-Crafts-type pathways, which provide a conceptually different strategy for the ring opening of tertiary cycloalkanols.
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Affiliation(s)
- Xue-Song Li
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Xiangtao Kong
- Henan Key Laboratory of New Optoelectronic Functional Materials, College of Chemistry and Chemical Engineering, Anyang Normal University, Anyang 455000, P. R. China
| | - Cui-Tian Wang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Zhi-Jie Niu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Wan-Xu Wei
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Hong-Chao Liu
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Zhe Zhang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
| | - Yuke Li
- Department of Chemistry and Centre for Scientific Modeling and Computation, Chinese University of Hong Kong, Shatin, Hong Kong 999077, China
| | - Yong-Min Liang
- State Key Laboratory of Applied Organic Chemistry, Lanzhou University, Lanzhou 730000, China
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9
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Wang HS, Nan X, Li HJ, Cao ZY, Wu YC. A modular strategy for the synthesis of marine originated meroterpenoid-type natural products. Org Biomol Chem 2021; 19:9439-9447. [PMID: 34679152 DOI: 10.1039/d1ob01598b] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A modular strategy for meroterpenoid-type marine natural products has been developed from commercially available (+)-sclareolide using a palladium-catalyzed tandem carbene migratory insertion as one of the key steps. Its applicability is showcased by the formal synthesis of (-)-pelorol and 9-epi-pelorol and the concise total synthesis of (+)-yahazunone and (+)-yahazunol. It is worth noting that the formal synthesis of (-)-pelorol and 9-epi-pelorol was achieved by controlling the reaction sequence of hydrogenation and cyclization.
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Affiliation(s)
- Hong-Shuang Wang
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, P. R. China.
| | - Xiang Nan
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, P. R. China.
| | - Hui-Jing Li
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, P. R. China.
| | - Zhong-Yan Cao
- College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, P. R. China.
| | - Yan-Chao Wu
- Weihai Marine Organism & Medical Technology Research Institute, Harbin Institute of Technology, Weihai 264209, P. R. China.
- Weihai Chuanghui Environmental Protection Technology Co., Ltd, Weihai 264200, P. R. China.
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10
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Wang X, Hu N, Kong W, Song B, Li S. Facile and divergent optimization of chromazonarol enabled the identification of simplified drimane meroterpenoids as novel pharmaceutical leads. Eur J Med Chem 2021; 227:113912. [PMID: 34653771 DOI: 10.1016/j.ejmech.2021.113912] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 10/06/2021] [Accepted: 10/07/2021] [Indexed: 12/22/2022]
Abstract
The diversity of drimane hydroquinones was significantly expanded by the facile construction of (+)-chromazonarol relevant natural products, isomers, and analogues for the discovery of new pharmaceutical leads. The structure-activity relationship of (+)-chromazonarol relevant (non)-natural products was delineated via the synergistic interaction of the programmable synthesis and bioactivity-guided screening. The first divergent derivatization of (+)-chromazonarol demonstrated that the phenolic hydroxyl group is one inviolable requirement for antifungal effect. Pinpoint modification of (+)-yahazunol manifested the position of hydroxyl group was crucial for both antifungal and antitumor activities. (+)-Albaconol, (+)-neoalbaconol, and two (+)-yahazunol isomers (24 and 25) proved to be the novel pharmaceutical leads. The probable macromolecular targets were estimated to deliver new information about the biological potentials resident in (+)-yahazunol relevant products. This work also featured the first synthesis of (+)-albaconol and (+)-neoalbaconol, the first biological exploration of (+)-dictyvaric acid and improved preparation of (+)-8-epi-puupehedione and a promising pelorol analogue.
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Affiliation(s)
- Xia Wang
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China; Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing, 210095, China
| | - Nvdan Hu
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Wenlong Kong
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Baoan Song
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China
| | - Shengkun Li
- Laboratory Breeding Base of Green Pesticide and Agricultural Bioengineering, Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang, 550025, China; Department of Pesticide Science, College of Plant Protection, Nanjing Agricultural University, Weigang 1, Xuanwu District, Nanjing, 210095, China.
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11
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Li YM, Sun YT, Li BY, Qin HB. Total Synthesis of Dysifragilones A and B and Dysidavarone C. Org Lett 2021; 23:7254-7258. [PMID: 34459615 DOI: 10.1021/acs.orglett.1c02641] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The concise synthesis of dysifragilones A and B and dysidavarones has been accomplished for the first time in a divergent way from a common intermediate. The synthetic route features an intramolecular reductive Heck reaction to construct the 6/5/6/6/-tetracycle of dysifragilones A and B and an intramolecular palladium-catalyzed α-arylation of a sterically hindered ketone to forge the tetracyclo[7.7.1.02,7.010,15]heptadecane core structure of dysidavarone C. The late-stage introduction of amino and ethoxy groups is effective.
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Affiliation(s)
- Yang-Ming Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China,Kunming Institute of Botany, Chinese Academy of Sciences; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Yu-Tong Sun
- State Key Laboratory of Phytochemistry and Plant Resources in West China,Kunming Institute of Botany, Chinese Academy of Sciences; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Bi-Yuan Li
- State Key Laboratory of Phytochemistry and Plant Resources in West China,Kunming Institute of Botany, Chinese Academy of Sciences; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, P. R. China.,University of Chinese Academy of Sciences, Beijing 100049, P. R. China
| | - Hong-Bo Qin
- State Key Laboratory of Phytochemistry and Plant Resources in West China,Kunming Institute of Botany, Chinese Academy of Sciences; Yunnan Key Laboratory of Natural Medicinal Chemistry, Kunming 650201, P. R. China.,School of Chemistry and Environment, Yunnan Minzu University, Kunming 650031, P. R. China
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12
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Gu H, Hu Y, Jia Y, Zhou Q, Luo G, Chen X. Total Synthesis of (-)-Lepadin F based on a Stereoselective Diels-Alder Reaction Controlled by a Ketolactone-type Dienophile. Chemistry 2021; 27:4141-4149. [PMID: 33289139 DOI: 10.1002/chem.202004778] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Indexed: 01/24/2023]
Abstract
An efficient approach to the type III lepadin alkaloids (lepadins F and G) has been developed through a key Diels-Alder reaction, in which a novel ketolactone-type dienophile with chiral diol unit is employed to generate the desirable all-cis-trisubstituted cyclohexene with excellent regio- and stereoselectivity control. The subsequent selective sulfonylation of the diol unit followed by SN 2 cyclization under hydrogenation conditions could construct the substituted piperidine ring. By using this approach, (-)-lepadin F is synthesized from ethyl l-lactate for the first time.
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Affiliation(s)
- He Gu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, People's Republic of China
| | - Yue Hu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, People's Republic of China
| | - Yuanliang Jia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, People's Republic of China
| | - Qin Zhou
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, People's Republic of China
| | - Guiyin Luo
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, People's Republic of China
| | - Xiaochuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, 610064, Chengdu, People's Republic of China
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13
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Targeting SHIP1 and SHIP2 in Cancer. Cancers (Basel) 2021; 13:cancers13040890. [PMID: 33672717 PMCID: PMC7924360 DOI: 10.3390/cancers13040890] [Citation(s) in RCA: 19] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2021] [Revised: 02/12/2021] [Accepted: 02/13/2021] [Indexed: 12/31/2022] Open
Abstract
Simple Summary Phosphoinositol signaling pathways and their dysregulation have been shown to have a fundamental role in health and disease, respectively. The SH2-containing 5′ inositol phosphatases, SHIP1 and SHIP2, are regulators of the PI3K/AKT pathway that have crucial roles in cancer progression. This review aims to summarize the role of SHIP1 and SHIP2 in cancer signaling and the immune response to cancer, the discovery and use of SHIP inhibitors and agonists as possible cancer therapeutics. Abstract Membrane-anchored and soluble inositol phospholipid species are critical mediators of intracellular cell signaling cascades. Alterations in their normal production or degradation are implicated in the pathology of a number of disorders including cancer and pro-inflammatory conditions. The SH2-containing 5′ inositol phosphatases, SHIP1 and SHIP2, play a fundamental role in these processes by depleting PI(3,4,5)P3, but also by producing PI(3,4)P2 at the inner leaflet of the plasma membrane. With the intent of targeting SHIP1 or SHIP2 selectively, or both paralogs simultaneously, small molecule inhibitors and agonists have been developed and tested in vitro and in vivo over the last decade in various disease models. These studies have shown promising results in various pre-clinical models of disease including cancer and tumor immunotherapy. In this review the potential use of SHIP inhibitors in cancer is discussed with particular attention to the molecular structure, binding site and efficacy of these SHIP inhibitors.
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14
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Parida SK, Mandal T, Das S, Hota SK, De Sarkar S, Murarka S. Single Electron Transfer-Induced Redox Processes Involving N-(Acyloxy)phthalimides. ACS Catal 2021. [DOI: 10.1021/acscatal.0c04756] [Citation(s) in RCA: 90] [Impact Index Per Article: 30.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Affiliation(s)
- Sushanta Kumar Parida
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India
| | - Tanumoy Mandal
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, West Bengal, India
| | - Sanju Das
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, West Bengal, India
| | - Sudhir Kumar Hota
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India
| | - Suman De Sarkar
- Department of Chemical Sciences, Indian Institute of Science Education and Research Kolkata, Mohanpur-741246, West Bengal, India
| | - Sandip Murarka
- Department of Chemistry, Indian Institute of Technology Jodhpur, Karwar-342037, Rajasthan, India
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15
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Wang X, Zhang S, Cui P, Li S. Modular Synthesis of Drimane Meroterpenoids Leveraging Decarboxylative Borylation and Suzuki Coupling. Org Lett 2020; 22:8702-8707. [PMID: 33108732 DOI: 10.1021/acs.orglett.0c03294] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Drimane meroterpenoids have attracted an increasing amount of attention in the discovery of therapeutically important probes, while the laggard synthetic accessibility is a conspicuous challenge. A new paradigm merging decarboxylative borylation and Suzuki coupling was developed as a powerful platform. Key features include the mild conditions, good chemoselectivity, operational facility, scalability, and easy availability of the coupling partners. This practical strategy enables the expedient formal synthesis of a large number of natural products and rapid generation of analogues.
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Affiliation(s)
- Xia Wang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China.,Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
| | - Shasha Zhang
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China
| | - Pengcheng Cui
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China
| | - Shengkun Li
- College of Plant Protection, State & Local Joint Engineering Research Center of Green Pesticide Invention and Application, Nanjing Agricultural University, Nanjing 210095, China.,Key Laboratory of Green Pesticide and Agricultural Bioengineering, Ministry of Education, Guizhou University, Huaxi District, Guiyang 550025, China
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16
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Chen X, Zhang D, Xu D, Zhou H, Xu G. Remote C-H Activation Strategy Enables Total Syntheses of Nortriterpenoids (±)-Walsucochin B and (±)-Walsucochinoids M and N. Org Lett 2020; 22:6993-6997. [PMID: 32822191 DOI: 10.1021/acs.orglett.0c02548] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Total syntheses of (±)-walsucochin B and (±)-walsucochinoids M and N have been achieved from farnesyl bromide. The key steps of the synthetic sequence are the titanocene-mediated radical cyclization and base-induced cycloaromatization for the rapid construction of the 6/6/5/6-fused tetracyclic skeleton. Importantly, a Cu-mediated remote C-H hydroxylation reaction has been developed to site-selectively install the oxygen function at the C-7 position of the target molecules, thus solving the biggest challenge for the synthesis of the compounds.
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Affiliation(s)
- Xinyue Chen
- College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling 712100, Shaanxi, China
| | - Danyang Zhang
- College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling 712100, Shaanxi, China
| | - Dan Xu
- College of Chemistry & Pharmacy, Northwest A&F University, 22 Xinong Road, Yangling 712100, Shaanxi, China.,State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Shaanxi Key Laboratory of Natural Products & Chemical Biology, Yangling 712100, Shaanxi, China
| | - Huan Zhou
- College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling 712100, Shaanxi, China.,State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Shaanxi Key Laboratory of Natural Products & Chemical Biology, Yangling 712100, Shaanxi, China
| | - Gong Xu
- College of Plant Protection, Northwest A&F University, 3 Taicheng Road, Yangling 712100, Shaanxi, China.,State Key Laboratory of Crop Stress Biology for Arid Areas, Key Laboratory of Botanical Pesticide R&D in Shaanxi Province, Shaanxi Key Laboratory of Natural Products & Chemical Biology, Yangling 712100, Shaanxi, China
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17
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Chamberlain TC, Cheung ST, Yoon JSJ, Ming-Lum A, Gardill BR, Shakibakho S, Dzananovic E, Ban F, Samiea A, Jawanda K, Priatel J, Krystal G, Ong CJ, Cherkasov A, Andersen RJ, McKenna SA, Van Petegem F, Mui ALF. Interleukin-10 and Small Molecule SHIP1 Allosteric Regulators Trigger Anti-inflammatory Effects through SHIP1/STAT3 Complexes. iScience 2020; 23:101433. [PMID: 32823063 PMCID: PMC7452241 DOI: 10.1016/j.isci.2020.101433] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2019] [Revised: 07/07/2020] [Accepted: 07/31/2020] [Indexed: 12/12/2022] Open
Abstract
The anti-inflammatory actions of interleukin-10 (IL10) are thought to be mediated primarily by the STAT3 transcription factor, but pro-inflammatory cytokines such as interleukin-6 (IL6) also act through STAT3. We now report that IL10, but not IL6 signaling, induces formation of a complex between STAT3 and the inositol polyphosphate-5-phosphatase SHIP1 in macrophages. Both SHIP1 and STAT3 translocate to the nucleus in macrophages. Remarkably, sesquiterpenes of the Pelorol family, which we previously described as allosteric activators of SHIP1 phosphatase activity, could induce SHIP1/STAT3 complex formation in cells and mimic the anti-inflammatory action of IL10 in a mouse model of colitis. Using crystallography and docking studies we identified a drug-binding pocket in SHIP1. Our studies reveal new mechanisms of action for both STAT3 and SHIP1 and provide a rationale for use of allosteric SHIP1-activating compounds, which mimic the beneficial anti-inflammatory actions of IL10. Video Abstract
Loss of normal interleukin-10 (IL10) function results in inflammatory diseases IL10 or SHIP1 agonists induce formation of SHIP1/STAT3 complexes SHIP1 Y190 phosphorylation is required for SHIP1/STAT3 complex formation SHIP1 agonists mimic IL10 anti-inflammatory action in a mouse model of colitis
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Affiliation(s)
- Thomas C Chamberlain
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Sylvia T Cheung
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Jeff S J Yoon
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Andrew Ming-Lum
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - Bernd R Gardill
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Soroush Shakibakho
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - Edis Dzananovic
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Fuqiang Ban
- Department of Urological Sciences, University of British Columbia, Vancouver, Canada
| | - Abrar Samiea
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - Kamaldeep Jawanda
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada
| | - John Priatel
- Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
| | - Gerald Krystal
- British Columbia Cancer Research Centre, Vancouver, BC V5Z 1L3, Canada; Department of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, Canada
| | - Christopher J Ong
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Urological Sciences, University of British Columbia, Vancouver, Canada
| | - Artem Cherkasov
- Department of Urological Sciences, University of British Columbia, Vancouver, Canada
| | - Raymond J Andersen
- Department of Chemistry, University of British Columbia, Vancouver, Canada
| | - Sean A McKenna
- Department of Chemistry, University of Manitoba, Winnipeg, Canada
| | - Filip Van Petegem
- Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada
| | - Alice L-F Mui
- Immunity and Infection Research Centre, Vancouver Coastal Health Research Institute, Vancouver, BC V6H 3Z6, Canada; Department of Surgery, University of British Columbia, Vancouver, Canada; Department of Biochemistry and Molecular Biology, University of British Columbia, Vancouver, Canada.
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18
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Williams DE, Andersen RJ. Biologically active marine natural products and their molecular targets discovered using a chemical genetics approach. Nat Prod Rep 2020; 37:617-633. [PMID: 31750842 PMCID: PMC7874888 DOI: 10.1039/c9np00054b] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Covering: 2000 to 2019The discovery of new natural products that have some combination of unprecedented chemical structures, biological activities of therapeutic interest for urgent medical needs, and new molecular targets provides the fuel that sustains the vitality of natural products chemistry research. Unfortunately, finding these important new compounds is neither routine or trivial and a major challenge is finding effective discovery paradigms. This review presents examples that illustrate the effectiveness of a chemical genetics approach to marine natural product (MNP) discovery that intertwines compound discovery, molecular target identification, and phenotypic response/biological activity. The examples include MNPs that have complex unprecedented structures, new or understudied molecular targets, and potent biological activities of therapeutic interest. A variety of methods to identify molecular targets are also featured.
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Affiliation(s)
- David E Williams
- Departments of Chemistry and Earth, Ocean & Atmospheric Science, University of British Columbia, Vancouver, British Columbia V6T 1Z1, Canada.
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19
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Lemm EA, Valle-Argos B, Smith LD, Richter J, Gebreselassie Y, Carter MJ, Karolova J, Svaton M, Helman K, Weston-Bell NJ, Karydis L, Williamson CT, Lenz G, Pettigrew J, Harwig C, Stevenson FK, Cragg M, Forconi F, Steele AJ, Cross J, Mackenzie L, Klener P, Packham G. Preclinical Evaluation of a Novel SHIP1 Phosphatase Activator for Inhibition of PI3K Signaling in Malignant B Cells. Clin Cancer Res 2020; 26:1700-1711. [PMID: 31831562 PMCID: PMC7124891 DOI: 10.1158/1078-0432.ccr-19-2202] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 10/23/2019] [Accepted: 12/09/2019] [Indexed: 01/09/2023]
Abstract
PURPOSE PI3K signaling is a common feature of B-cell neoplasms, including chronic lymphocytic leukemia (CLL) and diffuse large B-cell lymphoma (DLBCL), and PI3K inhibitors have been introduced into the clinic. However, there remains a clear need to develop new strategies to target PI3K signaling. PI3K activity is countered by Src homology domain 2-containing inositol-5'-phosphatase 1 (SHIP1) and, here, we have characterized the activity of a novel SHIP1 activator, AQX-435, in preclinical models of B-cell malignancies. EXPERIMENTAL DESIGN In vitro activity of AQX-435 was evaluated using primary CLL cells and DLBCL-derived cell lines. In vivo activity of AQX-435, alone or in combination with the Bruton's tyrosine kinase (BTK) inhibitor ibrutinib, was assessed using DLBCL cell line and patient-derived xenograft models. RESULTS Pharmacologic activation of SHIP1 using AQX-435 was sufficient to inhibit anti-IgM-induced PI3K-mediated signaling, including induction of AKT phosphorylation and MYC expression, without effects on upstream SYK phosphorylation. AQX-435 also cooperated with the BTK inhibitor ibrutinib to enhance inhibition of anti-IgM-induced AKT phosphorylation. AQX-435 induced caspase-dependent apoptosis of CLL cells preferentially as compared with normal B cells, and overcame in vitro survival-promoting effects of microenvironmental stimuli. Finally, AQX-435 reduced AKT phosphorylation and growth of DLBCL in vivo and cooperated with ibrutinib for tumor growth inhibition. CONCLUSIONS Our results using AQX-435 demonstrate that SHIP1 activation may be an effective novel therapeutic strategy for treatment of B-cell neoplasms, alone or in combination with ibrutinib.
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MESH Headings
- Animals
- Antineoplastic Agents/pharmacology
- Apoptosis/drug effects
- Cell Line, Tumor
- Enzyme Activators/pharmacology
- Female
- Humans
- Leukemia, Lymphocytic, Chronic, B-Cell/drug therapy
- Leukemia, Lymphocytic, Chronic, B-Cell/metabolism
- Leukemia, Lymphocytic, Chronic, B-Cell/pathology
- Lymphoma, Large B-Cell, Diffuse/drug therapy
- Lymphoma, Large B-Cell, Diffuse/metabolism
- Lymphoma, Large B-Cell, Diffuse/pathology
- Mice
- Mice, Inbred NOD
- Phosphatidylinositol 3-Kinases/chemistry
- Phosphatidylinositol 3-Kinases/metabolism
- Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases/genetics
- Phosphatidylinositol-3,4,5-Trisphosphate 5-Phosphatases/metabolism
- Sesquiterpenes/pharmacology
- Signal Transduction
- Xenograft Model Antitumor Assays
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Affiliation(s)
- Elizabeth A Lemm
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Beatriz Valle-Argos
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Lindsay D Smith
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Johanna Richter
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Yohannes Gebreselassie
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Matthew J Carter
- Centre for Cancer Immunology, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Jana Karolova
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic
- CLIP - Childhood Leukaemia Investigation Prague, Second Faculty of Medicine and Charles University Hospital in Motol, Prague, Czech Republic
| | - Michael Svaton
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic
- CLIP - Childhood Leukaemia Investigation Prague, Second Faculty of Medicine and Charles University Hospital in Motol, Prague, Czech Republic
| | - Karel Helman
- Faculty of Informatics and Statistics, University of Economics, Prague, Czech Republic
| | - Nicola J Weston-Bell
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Laura Karydis
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Chris T Williamson
- Aquinox Pharmaceuticals (Canada) Inc., Vancouver, British Columbia, Canada
| | - Georg Lenz
- Department of Medicine A for Hematology, Oncology, and Pneumology, University Hospital Münster, Münster, Germany
| | - Jeremy Pettigrew
- Aquinox Pharmaceuticals (Canada) Inc., Vancouver, British Columbia, Canada
| | - Curtis Harwig
- Aquinox Pharmaceuticals (Canada) Inc., Vancouver, British Columbia, Canada
| | - Freda K Stevenson
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Mark Cragg
- Centre for Cancer Immunology, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Francesco Forconi
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Andrew J Steele
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom
| | - Jennifer Cross
- Aquinox Pharmaceuticals (Canada) Inc., Vancouver, British Columbia, Canada
| | - Lloyd Mackenzie
- Aquinox Pharmaceuticals (Canada) Inc., Vancouver, British Columbia, Canada
| | - Pavel Klener
- Institute of Pathological Physiology, First Faculty of Medicine, Charles University, Prague, Czech Republic
- CLIP - Childhood Leukaemia Investigation Prague, Second Faculty of Medicine and Charles University Hospital in Motol, Prague, Czech Republic
| | - Graham Packham
- Cancer Research UK Centre, Cancer Sciences Unit, Faculty of Medicine, University of Southampton, Southampton, United Kingdom.
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20
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Zhou P, XU T. Nickel-catalyzed intramolecular desymmetrization addition of aryl halides to 1,3-diketones. Chem Commun (Camb) 2020; 56:8194-8197. [DOI: 10.1039/d0cc00457j] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A nickel-catalyzed intramolecular addition of aryl halides to 1,3-diketones was first developed to afford a polycyclic framework with two tetrasubstituted carbons in excellent diastereoselectivity. Moderate enantioselectivities were also achieved.
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Affiliation(s)
- Pan Zhou
- Shanghai Key Laboratory of Chemical Assessment and Sustainability
- School of Chemical Science and Engineering
- Tongji University
- Shanghai
- P. R. China
| | - Tao XU
- Shanghai Key Laboratory of Chemical Assessment and Sustainability
- School of Chemical Science and Engineering
- Tongji University
- Shanghai
- P. R. China
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21
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Rodger RT, Graham MS, McErlean CSP. Hyperconjomer stereocontrol of cationic polyene cyclisations. Org Biomol Chem 2019; 17:8551-8560. [PMID: 31528940 DOI: 10.1039/c9ob01364d] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Polyene cyclisations are a powerful method for the direct generation of molecular complexity. This paper describes the use of computational methods to investigate the stereoselectivity of cationic polyene cyclisations of geranylbenzene derivatives. The outcomes highlight the different reactivity of hyperconjomers during the key Friedel-Crafts alkylation step, and informed a successful strategy for the synthesis of (±)-taiwaniaquinone G with improved levels of stereoselectivity.
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Affiliation(s)
- Robert T Rodger
- School of Chemistry, University of Sydney, Sydney, NSW 2006, Australia.
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22
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Liu HM, Chen D, Xu WD, Dang LZ, Qin HB. Total synthesis of (−)-akaol A via a conformational constraint strategy. Org Chem Front 2018. [DOI: 10.1039/c8qo00375k] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Our synthesis of akaol A features a well-designed Friedel–Crafts cyclization, which ensures a cis-fused B/C ring through a conformational constraint strategy.
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Affiliation(s)
- Hao-Miao Liu
- State Key Laboratory of Photochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- and Yunnan Key laboratory of Natural Medicinal Chemistry
- Kunming 650201
| | - Dong Chen
- State Key Laboratory of Photochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- and Yunnan Key laboratory of Natural Medicinal Chemistry
- Kunming 650201
| | - Wen-Dan Xu
- State Key Laboratory of Photochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- and Yunnan Key laboratory of Natural Medicinal Chemistry
- Kunming 650201
| | - Li-Zhi Dang
- China Tobacco Yunnan Industrial Co
- Ltd
- Kunming
- P. R. China
| | - Hong-Bo Qin
- State Key Laboratory of Photochemistry and Plant Resources in West China
- Kunming Institute of Botany
- Chinese Academy of Sciences
- and Yunnan Key laboratory of Natural Medicinal Chemistry
- Kunming 650201
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23
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Li X, Hu L, Jia J, Gu H, Jia Y, Chen X. A Stereoselective Approach toward (−)-Lepadins A–C. Org Lett 2017; 19:5372-5375. [DOI: 10.1021/acs.orglett.7b02647] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Xiong Li
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Lingling Hu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Junhao Jia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - He Gu
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Yuanliang Jia
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
| | - Xiaochuan Chen
- Key Laboratory of Green Chemistry & Technology of Ministry of Education, College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
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24
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Andersen RJ. Sponging off nature for new drug leads. Biochem Pharmacol 2017; 139:3-14. [PMID: 28411115 DOI: 10.1016/j.bcp.2017.04.012] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2017] [Accepted: 04/10/2017] [Indexed: 12/17/2022]
Abstract
Marine sponges have consistently been the richest source of new marine natural products with unprecedented chemical scaffolds and potent biological activities that have been reported in the chemical literature since the early 1970s. During the last 40years, chemists in the Andersen laboratory at UBC, in collaboration with biologists, have discovered many novel bioactive sponge natural products. Four experimental drug candidates for treatment of inflammation and cancer, that were inspired by members of this sponge natural product collection, have progressed to phase I/II/III clinical trials. This review recounts the scientific stories behind the discovery and development of these four drug candidates; IPL576,092, HTI-286 (Taltobulin), EPI-506 (Ralaniten acetate), and AQX-1125.
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Affiliation(s)
- Raymond J Andersen
- Departments of Chemistry and Earth, Ocean & Atmospheric Sciences, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1, Canada.
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25
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Graham M, Baker RW, McErlean CSP. Cationic Polyene Cyclization for Taiwaniaquinoid Construction. European J Org Chem 2017. [DOI: 10.1002/ejoc.201601349] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Marlowe Graham
- School of Chemistry; The University of Sydney; 2006 New South Wales Australia
| | - Robert W. Baker
- School of Chemistry; The University of Sydney; 2006 New South Wales Australia
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26
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Thomas MP, Erneux C, Potter BVL. SHIP2: Structure, Function and Inhibition. Chembiochem 2017; 18:233-247. [DOI: 10.1002/cbic.201600541] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2016] [Indexed: 11/10/2022]
Affiliation(s)
- Mark P. Thomas
- Department of Pharmacy and Pharmacology; University of Bath; Claverton Down Bath BA2 7AY UK
| | - Christophe Erneux
- I.R.I.B.H.M.; Université Libre de Bruxelles; Campus Erasme 808 Route de Lennik 1070 Brussels Belgium
| | - Barry V. L. Potter
- Drug Discovery and Medicinal Chemistry; Department of Pharmacology; University of Oxford; Mansfield Road Oxford OX1 3QT UK
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27
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Włodarczyk K, Borowski P, Drach M, Stankevič M. Cyclization of β-hydroxyalkylphosphine oxides - Mechanism elucidation using experimental and DFT methods. Tetrahedron 2017. [DOI: 10.1016/j.tet.2016.12.008] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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28
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Nagaraju K, Chegondi R, Chandrasekhar S. Expanding Diversity without Protecting Groups: (+)-Sclareolide to Indolosesquiterpene Alkaloid Mycoleptodiscin A and Analogues. Org Lett 2016; 18:2684-7. [PMID: 27181938 DOI: 10.1021/acs.orglett.6b01145] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Short and scalable synthesis of the complex pentacyclic indolosesquiterpene natural product mycoleptodiscin A has been achieved from commercially available diterpenoid (+)-sclareolide in 19% overall yield. This approach allows one to prepare various analogues of mycoleptodiscin using McMurry cyclization as a key reaction with just three chromatographic purifications.
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Affiliation(s)
- Karre Nagaraju
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - Rambabu Chegondi
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
| | - Srivari Chandrasekhar
- Division of Natural Products Chemistry, CSIR-Indian Institute of Chemical Technology , Hyderabad 500007, India
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29
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Zhu Y, Wang Q, Cornwall RG, Shi Y. Organocatalytic asymmetric epoxidation and aziridination of olefins and their synthetic applications. Chem Rev 2014; 114:8199-256. [PMID: 24785198 DOI: 10.1021/cr500064w] [Citation(s) in RCA: 333] [Impact Index Per Article: 33.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Affiliation(s)
- Yingguang Zhu
- Department of Chemistry, Colorado State University , Fort Collins, Colorado 80523, United States
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30
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Xu S, Gu J, Li H, Ma D, Xie X, She X. Enantioselective Total Synthesis of (−)-Walsucochin B. Org Lett 2014; 16:1996-9. [DOI: 10.1021/ol500553x] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Affiliation(s)
- Shiyan Xu
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University Lanzhou 730000, P. R. China
| | - Jixiang Gu
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University Lanzhou 730000, P. R. China
| | - Huilin Li
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University Lanzhou 730000, P. R. China
| | - Donghui Ma
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University Lanzhou 730000, P. R. China
| | - Xingang Xie
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University Lanzhou 730000, P. R. China
| | - Xuegong She
- State
Key Laboratory of Applied Organic Chemistry, College of Chemistry
and Chemical Engineering, Lanzhou University Lanzhou 730000, P. R. China
- State
Key Laboratory for Oxo Synthesis and Selective Oxidation, Lanzhou
Institute of Chemical Physics, Chinese Academy of Sciences, Lanzhou 730000, P. R. China
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Viernes DR, Choi LB, Kerr WG, Chisholm JD. Discovery and development of small molecule SHIP phosphatase modulators. Med Res Rev 2013; 34:795-824. [PMID: 24302498 DOI: 10.1002/med.21305] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Inositol phospholipids play an important role in the transfer of signaling information across the cell membrane in eukaryotes. These signals are often governed by the phosphorylation patterns on the inositols, which are mediated by a number of inositol kinases and phosphatases. The src homology 2 (SH2) containing inositol 5-phosphatase (SHIP) plays a central role in these processes, influencing signals delivered through the PI3K/Akt/mTOR pathway. SHIP modulation by small molecules has been implicated as a treatment in a number of human disease states, including cancer, inflammatory diseases, diabetes, atherosclerosis, and Alzheimer's disease. In addition, alteration of SHIP phosphatase activity may provide a means to facilitate bone marrow transplantation and increase blood cell production. This review discusses the cellular signaling pathways and protein-protein interactions that provide the molecular basis for targeting the SHIP enzyme in these disease states. In addition, a comprehensive survey of small molecule modulators of SHIP1 and SHIP2 is provided, with a focus on the structure, potency, selectivity, and solubility properties of these compounds.
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Affiliation(s)
- Dennis R Viernes
- Department of Chemistry, Syracuse University, Syracuse, NY, USA 13244
| | - Lydia B Choi
- Department of Chemistry, Syracuse University, Syracuse, NY, USA 13244
| | - William G Kerr
- Department of Chemistry, Syracuse University, Syracuse, NY, USA 13244.,Department of Microbiology & Immunology, SUNY Upstate Medical University, Syracuse, NY, USA 13210.,Department of Pediatrics, SUNY Upstate Medical University, Syracuse, NY, USA 13210
| | - John D Chisholm
- Department of Chemistry, Syracuse University, Syracuse, NY, USA 13244
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Chemical Institute of Canada and Canadian Society for Chemistry Awards. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/anie.201209647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Preise des Chemical Institute of Canada und der Canadian Society for Chemistry. Angew Chem Int Ed Engl 2013. [DOI: 10.1002/ange.201209647] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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