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Wang S, Liu Y, Liang Y, Xi Y, Zhai Y, Lee D, Xu J, Guo Y. Discovery of antitumor diterpenoids from Casearia graveolens targeting VEGFR-2 to inhibit angiogenesis. Chin J Nat Med 2024; 22:842-853. [PMID: 39326978 DOI: 10.1016/s1875-5364(24)60566-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2024] [Indexed: 09/28/2024]
Abstract
Eight novel clerodane diterpenoids (1-8) were isolated from the twigs of Casearia graveolens. Their structures were elucidated through comprehensive nuclear magnetic resonance (NMR), high-resolution electrospray ionization mass spectrometry (HR-ESI-MS), and electronic circular dichroism (ECD) analyses. In addition to structural determination, surface plasmon resonance (SPR) assays were conducted to investigate molecular interactions, revealing that compound 8 exhibited high affinity for vascular endothelial growth factor receptor 2 (VEGFR2), a key regulator of tumor angiogenesis. Subsequent in vivo experiments demonstrated that compound 8 effectively inhibited angiogenesis and displayed significant antitumor activity by suppressing tumor proliferation and metastasis in zebrafish xenograft models. These findings suggest that compound 8 holds promise as an anticancer lead compound targeting VEGFR-2 to obstruct tumor angiogenesis.
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Affiliation(s)
- Sibei Wang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Yuhui Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Yue Liang
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Yaru Xi
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Yupeng Zhai
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China
| | - Dongho Lee
- Department of Plant Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul 02841, South Korea
| | - Jing Xu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China; State Key Laboratory of Functions and Applications of Medicinal Plants, Guizhou Medical University, Guiyang 550014, China.
| | - Yuanqiang Guo
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, and Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin 300350, China.
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2
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Escobar-Montaño F, Gómez-Oliva R, Ezzanad A, Vázquez de Górgolas S, Zorrilla D, Macías-Sánchez AJ, Botubol-Ares JM, Nunez-Abades P, Castro C, Durán-Patrón R, Hernández-Galán R. Effect of lathyrane-type diterpenoids in neural stem cell physiology: Microbial transformations, molecular docking and dynamics studies. Bioorg Chem 2024; 153:107769. [PMID: 39236582 DOI: 10.1016/j.bioorg.2024.107769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2024] [Revised: 08/26/2024] [Accepted: 08/27/2024] [Indexed: 09/07/2024]
Abstract
Promoting endogenous neurogenesis for brain repair is emerging as a promising strategy to mitigate the functional impairments associated with various neurological disorders characterized by neuronal death. Diterpenes featuring tigliane, ingenane, jatrophane and lathyrane skeletons, frequently found in Euphorbia plant species, are known protein kinase C (PKC) activators and exhibit a wide variety of pharmacological properties, including the stimulation of neurogenesis. Microbial transformation of these diterpenes represents a green and sustainable methodology that offers a hitherto little explored approach to obtaining novel derivatives and exploring structure-activity relationships. In the present study, we report the biotransformation of euphoboetirane A (4) and epoxyboetirane A (5), two lathyrane diterpenoids isolated from Euphorbia boetica, by Mucor circinelloides MC NRRL3631. Our findings revealed the production of nine biotransformation products (6-14), including jatrophane derivatives originated through an unprecedented rearrangement from the parent lathyranes. The chemical structures and absolute configurations of the new compounds were elucidated through comprehensive analysis using NMR and ECD spectroscopy, as well as MS. The study evaluated how principal metabolites and their derivatives affect TGFα and NRG1 release, as well as their potential to promote proliferation or differentiation in cultures of NSC isolated from the SVZ of adult mice. In order to shed some light on the mechanisms underlying the ability of 12 as a neurogenic compound, the interactions of selected compounds with PKC δ-C1B were analyzed through molecular docking and molecular dynamics. Based on these, it clearly appears that the ability of compound 12 to form both acceptor and donor hydrogen bonds with certain amino acid residues in the enzyme pocket leads to a higher affinity compound-PKC complex, which correlates with the observed biological activity.
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Affiliation(s)
- Felipe Escobar-Montaño
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real Cádiz, Spain
| | - Ricardo Gómez-Oliva
- Área de Fisiología, Facultad de Medicina, Universidad de Cádiz, Cádiz, Spain; Instituto de Investigación e Innovación Biomédica de Cádiz (INiBICA), Cádiz, Spain
| | - Abdellah Ezzanad
- Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real Cádiz, Spain
| | | | - David Zorrilla
- Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, Puerto Real Cádiz, Spain; Instituto Universitario de Microscopía Electrónica y Materiales, Universidad de Cádiz, Puerto Real Cádiz, Spain
| | - Antonio J Macías-Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real Cádiz, Spain; Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real Cádiz, Spain
| | - José M Botubol-Ares
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real Cádiz, Spain; Instituto Universitario de Investigación Vitivinícola y Agroalimentaria, Universidad de Cádiz, Puerto Real Cádiz, Spain.
| | | | - Carmen Castro
- Área de Fisiología, Facultad de Medicina, Universidad de Cádiz, Cádiz, Spain; Instituto de Investigación e Innovación Biomédica de Cádiz (INiBICA), Cádiz, Spain
| | - Rosa Durán-Patrón
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real Cádiz, Spain; Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real Cádiz, Spain.
| | - Rosario Hernández-Galán
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real Cádiz, Spain; Instituto Universitario de Investigación en Biomoléculas, Universidad de Cádiz, Puerto Real Cádiz, Spain
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3
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Gustafson A, Kahr B. Optical Activity of Nonactin and Its Cation Complexes. Chirality 2024; 36:e23703. [PMID: 39034362 DOI: 10.1002/chir.23703] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2024] [Revised: 06/18/2024] [Accepted: 07/01/2024] [Indexed: 07/23/2024]
Abstract
Nonactin is a non-enantiomorphous (S4 symmetric), optically active natural product with a specific rotation of zero in solutions at all frequencies and temperatures. All optically active, non-enantiomorphous natural products have specific rotations of zero as a consequence of the spatial average of bisignate chiroptical (magnetoelectric or gyration) tensors with equal and opposite eigenvalues. Zeros that arise in the spatial average are distinct in principle, though not necessarily in practice, from zeros that arise in optical inactivity-chiroptical tensors with zero values for all elements as in centric molecules. Nonactin would be measurably optically active when oriented. The anisotropy of the optical activity of nonactin and its cation complexes, likewise S4 symmetric, are studied here by computation to emphasize the infelicitous linkage between optical activity and chirality. Computations show that changes in the conformation of the nonactin macrocycle upon complexation principally are responsible for diminishing the computed optical activity; the metals are incidental.
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Affiliation(s)
- Afton Gustafson
- Department of Chemistry and Molecular Design Institute, New York University, New York City, New York, USA
| | - Bart Kahr
- Department of Chemistry and Molecular Design Institute, New York University, New York City, New York, USA
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4
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Tristão DC, Barbosa H, de Castro Levatti EV, Andrade BA, Romanelli MM, Antar GM, Tempone AG, Lago JHG. Selective Activity Against Amastigote Forms of Trypanosoma cruzi and Leishmania infantum of Diastereomeric Dicentrine N-oxides. Chem Biodivers 2024:e202401247. [PMID: 38896778 DOI: 10.1002/cbdv.202401247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2024] [Revised: 06/17/2024] [Accepted: 06/19/2024] [Indexed: 06/21/2024]
Abstract
As part of our continuous research for the discovery of bioactive compounds against Trypanosoma cruzi and Leishmania infantum, the alkaloid (6aS)-dicentrine (1) was oxidized to afford (6aS,6S)- (2) and (6aS,6R)- (3) dicentrine-N-oxides. Evaluation of the cytotoxicity against NCTC cells indicated that 2 and 3 are non-toxic (CC50>200 μM) whereas 1 demonstrated CC50 of 52.0 μM. Concerning T. cruzi activity against amastigotes, derivatives 2 and 3 exhibited EC50 values of 9.9 μM (SI>20.2) and 27.5 μM (SI>7.3), respectively, but 1 is inactive (EC50>100 μM). Otherwise, when tested against L. infantum amastigotes, 1 and 3 exhibited EC50 values of 10.3 μM (SI=5.0) and 12.7 μM (SI>15.7), respectively, being 2 inactive (EC50>100 μM). Comparing the effects of positive controls benznidazol (EC50=6.5 μM and SI>30.7) and miltefosine (EC50=10.2 μM and SI=15.2), it was observed a selective antiparasitic activity to diastereomers 2 and 3 against T. cruzi and L. infantum. Considering stereochemical aspects, it was suggested that the configuration of the new stereocenter formed after oxidation of 1 played an important role in the bioactivity against amastigotes of both tested parasites.
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Affiliation(s)
- Daniela C Tristão
- Center for Natural and Human Sciences, Federal University of ABC, 09210-580, Santo Andre, SP, Brazil
| | - Henrique Barbosa
- Center for Natural and Human Sciences, Federal University of ABC, 09210-580, Santo Andre, SP, Brazil
| | | | | | | | - Guilherme M Antar
- Department of Agricultural and Biological Sciences, Federal University of Espirito Santo, 29932-540, São Matheus, ES, Brazil
| | | | - João Henrique G Lago
- Center for Natural and Human Sciences, Federal University of ABC, 09210-580, Santo Andre, SP, Brazil
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5
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Feineis D, Bringmann G. Structural variety and pharmacological potential of naphthylisoquinoline alkaloids. THE ALKALOIDS. CHEMISTRY AND BIOLOGY 2024; 91:1-410. [PMID: 38811064 DOI: 10.1016/bs.alkal.2024.03.001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2024]
Abstract
Naphthylisoquinoline alkaloids are a fascinating class of natural biaryl compounds. They show characteristic mono- and dimeric scaffolds, with chiral axes and stereogenic centers. Since the appearance of the last comprehensive overview on these secondary plant metabolites in this series in 1995, the number of discovered representatives has tremendously increased to more than 280 examples known today. Many novel-type compounds have meanwhile been discovered, among them naphthylisoquinoline-related follow-up products like e.g., the first seco-type (i.e., ring-opened) and ring-contracted analogues. As highlighted in this review, the knowledge on the broad structural chemodiversity of naphthylisoquinoline alkaloids has been decisively driven forward by extensive phytochemical studies on the metabolite pattern of Ancistrocladus abbreviatus from Coastal West Africa, which is a particularly "creative" plant. These investigations furnished a considerable number of more than 80-mostly new-natural products from this single species, with promising antiplasmodial activities and with pronounced cytotoxic effects against human leukemia, pancreatic, cervical, and breast cancer cells. Another unique feature of naphthylisoquinoline alkaloids is their unprecedented biosynthetic origin from polyketidic precursors and not, as usual for isoquinoline alkaloids, from aromatic amino acids-a striking example of biosynthetic convergence in nature. Furthermore, remarkable botanical results are presented on the natural producers of naphthylisoquinoline alkaloids, the paleotropical Dioncophyllaceae and Ancistrocladaceae lianas, including first investigations on the chemoecological role of these plant metabolites and their storage and accumulation in particular plant organs.
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Affiliation(s)
- Doris Feineis
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Würzburg, Germany.
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6
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Wu Z, Li XM, Yang SQ, Wang BG, Li X. Antibacterial Polyketides from the Deep-Sea Cold-Seep-Derived Fungus Talaromyces sp. CS-258. Mar Drugs 2024; 22:204. [PMID: 38786595 PMCID: PMC11122946 DOI: 10.3390/md22050204] [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: 03/29/2024] [Revised: 04/25/2024] [Accepted: 04/25/2024] [Indexed: 05/25/2024] Open
Abstract
Thirty-two fungal polyketide derivatives, including eleven new compounds, namely (3R,5'R)-5-hydroxytalaroflavone (1), talaroisochromenols A-C (3, 5, and 11), (8R,9R,10aR)-5-hydroxyaltenuene (13), (8R,9R,10aS)-5-hydroxyaltenuene (14), (8R,9S,10aR)-5-hydroxyaltenuene (15), nemanecins D and E (25 and 26), 2,5-dimethyl-8-iodochromone (27), and talarofurolactone A (29), together with one new naturally occurring but previously synthesized metabolite, 6-hydroxy-4-methoxycoumarin (28), were isolated and identified from the deep-sea cold-seep-derived fungus Talaromyces sp. CS-258. Among them, racemic ((±)-11) or epimeric (13-15, 25, and 26) mixtures were successfully separated by chiral or gradient elution HPLC. Meanwhile, compound 27 represents a rarely reported naturally occurring iodinated compound. Their planar structures as well as absolute configurations were determined by extensive analysis via NMR, MS, single-crystal X-ray diffraction, Mosher's method, and ECD or NMR calculation (with DP4+ probability analysis). Possible biosynthetic routes of some isolated compounds, which are related to chromone or isochromone biosynthetic pathways, were put forward. The biological analysis results revealed that compounds 7, 9, 10, 18-22, 24, 30, and 31 showed broad-spectrum antibacterial activities against several human and aquatic pathogens with MIC ranges of 0.5-64 μg/mL.
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Affiliation(s)
- Zhenger Wu
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; (Z.W.); (X.-M.L.); (S.-Q.Y.)
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
| | - Xiao-Ming Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; (Z.W.); (X.-M.L.); (S.-Q.Y.)
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
| | - Sui-Qun Yang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; (Z.W.); (X.-M.L.); (S.-Q.Y.)
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
| | - Bin-Gui Wang
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; (Z.W.); (X.-M.L.); (S.-Q.Y.)
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
- Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Wenhai Road 1, Qingdao 266237, China
| | - Xin Li
- CAS and Shandong Province Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Nanhai Road 7, Qingdao 266071, China; (Z.W.); (X.-M.L.); (S.-Q.Y.)
- University of Chinese Academy of Sciences, Yuquan Road 19A, Beijing 100049, China
- Laboratory for Marine Biology and Biotechnology, Qingdao Marine Science and Technology Center, Wenhai Road 1, Qingdao 266237, China
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7
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Han JL, Lv TM, Niu JQ, Hao JL, Yao GD, Lin B, Huang XX, Song SJ. Isolation and characterization of seven neovibsane-type diterpenoids from Viburnum odoratissimum and their neuroblastoma cell protective effects. PHYTOCHEMISTRY 2024; 220:113992. [PMID: 38301947 DOI: 10.1016/j.phytochem.2024.113992] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 02/03/2024]
Abstract
Seven undescribed neovibsane-type diterpenoids (1-7) were isolated from the leaves of Viburnum odoratissimum. Their planar structures and relative configurations were elucidated based on a combination of 1D and 2D NMR analysis. The absolute configurations were confirmed by Rh2(OCOCF3)4-induced ECD analysis and comparison of experimental and TDDFT-calculated ECD spectrum. Based on the empirical results of the ECD of in situ formed Rh-complexes, rapid determination of the absolute configuration of C-14 within vibsane-type diterpenoids was proposed. In addition, 3 exhibited a high neuroblastoma cell protective effect of 81.8 % at 50 μM (the control group showed a neuroblastoma cell protective effect of 56.2 % at 50 μM).
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Affiliation(s)
- Jin-Ling Han
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Tian-Ming Lv
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Jia-Qi Niu
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Jin-Le Hao
- Department of Pharmaceutics, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Guo-Dong Yao
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
| | - Bin Lin
- Wuya College of Innovation, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China.
| | - Xiao-Xiao Huang
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China; Basic Science Research Center Base (Pharmaceutical Science), Shandong province, Yantai University, Yantai, 264005, China.
| | - Shao-Jiang Song
- Key Laboratory of Computational Chemistry-Based Natural Antitumor Drug Research & Development, Liaoning Province, Engineering Research Center of Natural Medicine Active Molecule Research & Development, Liaoning Province, Key Laboratory of Natural Bioactive Compounds Discovery & Modification, Shenyang, School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang, Liaoning, 110016, China
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8
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Parmar MP, Vala DP, Bhalodiya SS, Upadhyay DB, Patel CD, Patel SG, Gandholi SR, Shaik AH, Miller AD, Nogales J, Banerjee S, Padrón JM, Amri N, Kandukuri NK, Patel HM. A green bio-organic catalyst (taurine) promoted one-pot synthesis of ( R/ S)-2-thioxo-3,4-dihydropyrimidine(TDHPM)-5-carboxanilides: chiral investigations using circular dichroism and validation by computational approaches. RSC Adv 2024; 14:9300-9313. [PMID: 38505382 PMCID: PMC10949965 DOI: 10.1039/d4ra01391c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2024] [Accepted: 02/29/2024] [Indexed: 03/21/2024] Open
Abstract
Owing to the massive importance of dihydropyrimidine (DHPMs) scaffolds in the pharmaceutical industry and other areas, we developed an effective and sustainable one-pot reaction protocol for the synthesis of (R/S)-2-thioxo-DHPM-5-carboxanilides via the Biginelli-type cyclo-condensation reaction of aryl aldehydes, thiourea and various acetoacetanilide derivatives in ethanol at 100 °C. In this protocol, taurine was used as a green and reusable bio-organic catalyst. Twenty-three novel derivatives of (R/S)-TDHPM-5-carboxanilides and their structures were confirmed by various spectroscopy techniques. The aforementioned compounds were synthesized via the formation of one asymmetric centre, one new C-C bond, and two new C-N bonds in the final product. All the newly synthesized compounds were obtained in their racemic form with up to 99% yield. In addition, the separation of the racemic mixture of all the newly synthesized compounds was carried out by chiral HPLC (Prep LC), which provided up to 99.99% purity. The absolute configuration of all the enantiomerically pure isomers was determined using a circular dichroism study and validated by a computational approach. With up to 99% yield of 4d, this one-pot synthetic approach can also be useful for large-scale industrial production. One of the separated isomers (4R)-(+)-4S developed as a single crystal, and it was found that this crystal structure was orthorhombic.
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Affiliation(s)
- Mehul P Parmar
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Disha P Vala
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Savan S Bhalodiya
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Dipti B Upadhyay
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Chirag D Patel
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Subham G Patel
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
| | - Srinivasa R Gandholi
- YMC Application Lab Plot No. 78/A/6, Phase VI, Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal Hyderabad-500055 Telangana India
| | - Althaf H Shaik
- YMC Application Lab Plot No. 78/A/6, Phase VI, Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal Hyderabad-500055 Telangana India
| | - Amy Dunne Miller
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee Dundee UK
| | - Joaquina Nogales
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee Dundee UK
| | - Sourav Banerjee
- Department of Cellular and Systems Medicine, School of Medicine, University of Dundee Dundee UK
| | - José M Padrón
- BioLab, Instituto Universitario de Bio-Orgánica Antonio González, Universidad de La Laguna Avda. Astrofísico Francisco Sánchez 2 38206 La Laguna Spain
| | - Nasser Amri
- Department of Chemistry, College of Science, Jazan University P.O. Box 2097 Jazan 45142 Saudi Arabia
| | - Nagesh Kumar Kandukuri
- YMC Application Lab Plot No. 78/A/6, Phase VI, Industrial Park Jeedimetla, Gajularamaram Village, Quthbullapur, Medchal Hyderabad-500055 Telangana India
| | - Hitendra M Patel
- P. G. Department of Chemistry, Sardar Patel University Near University Circle, Vallabh Vidyanagar 388120 Gujarat India
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9
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Pourhadi H, El-Elimat T, Rangel-Grimaldo M, Graf TN, Falkinham JO, Khin M, Burdette JE, Mirtallo Ezzone N, Jeyaraj J, de Blanco EC, Pearce CJ, Oberlies NH. Semisynthesis, Characterization, and Biological Evaluation of Fluorinated Analogues of the Spirobisnaphthalene, Diepoxin-η. Tetrahedron Lett 2024; 134:154857. [PMID: 38328000 PMCID: PMC10846677 DOI: 10.1016/j.tetlet.2023.154857] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
Diepoxin-η (1) is a cytotoxic fungal metabolite belonging to the spirobisnaphthalene structural class. In this study, four mono fluorinated analogues (2-5) of diepoxin-η (1) were semisynthesized in a single-step by selectively fluorinating the naphthalene moiety with Selectfluor. The structures of 2-5 were elucidated using a set of spectroscopic and spectrometric techniques and were further confirmed by means of TDDFT-ECD and isotropic shielding tensors calculations. Compounds 2-5 showed equipotent cytotoxic activity to 1 when tested against OVCAR3 (ovarian) and MDA-MB-435 (melanoma) cancer cell lines with IC50 values that range from 5.7-8.2 μM.
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Affiliation(s)
- Hadi Pourhadi
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Tamam El-Elimat
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
- Department of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan
| | - Manuel Rangel-Grimaldo
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Tyler N. Graf
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
| | - Joseph O. Falkinham
- Department of Biological Sciences, Virginia Polytechnic and State University, Blacksburg, VA 24061, United States
| | - Manead Khin
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Joanna E. Burdette
- Department of Pharmaceutical Sciences, College of Pharmacy, University of Illinois at Chicago, Chicago, IL 60612, United States
| | - Nathan Mirtallo Ezzone
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus, Ohio 43210, United States
| | - Jonathan Jeyaraj
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus, Ohio 43210, United States
| | - Esperanza Carcache de Blanco
- Division of Medicinal Chemistry and Pharmacognosy, College of Pharmacy, Ohio State University, Columbus, Ohio 43210, United States
| | | | - Nicholas H. Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, NC 27402, United States
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10
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Tamuli R, Nguyen T, Macdonald JR, Pierens GK, Fisher GM, Andrews KT, Adewoyin FB, Omisore NO, Odaibo AB, Feng Y. Isolation and In Vitro and In Vivo Activity of Secondary Metabolites from Clerodendrum polycephalum Baker against Plasmodium Malaria Parasites. JOURNAL OF NATURAL PRODUCTS 2023; 86:2661-2671. [PMID: 37972998 DOI: 10.1021/acs.jnatprod.3c00743] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2023]
Abstract
Chemical investigation of the antimalarial medicinal plant Clerodendrum polycephalum led to the isolation of five new diterpenoids, including ajugarins VII-X (1-4) and teuvincenone K (5), along with four known compounds, namely, 12,16-epoxy-6,11,14,17-tetrahydroxy-17(15 → 16)-abeo-5,8,11,13,15-abietapentaen-7-one (6), methyl pheophorbide A (7), loliolide (8), and acacetin (9). The chemical structures of the new compounds were elucidated using NMR spectroscopy, mass spectrometry, circular dichroism, as well as density functional theory calculations. All compounds were evaluated for in vitro activity against Plasmodium falciparum 3D7 malaria parasites with methyl pheophorbide A (7) showing the strongest activity (IC50 4.49 μM). Subsequent in vivo testing in a Plasmodium berghei chemosuppression model showed that compound 7 significantly attenuated peripheral blood parasitemia, leading to 79% and 87% chemosuppression following oral doses at 10 and 20 mg/kg, respectively.
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Affiliation(s)
- Roktima Tamuli
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Thanh Nguyen
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Jacinta R Macdonald
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Gregory K Pierens
- Centre for Advanced Imaging, The University of Queensland, St. Lucia, Queensland 4072, Australia
| | - Gillian M Fisher
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Katherine T Andrews
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
| | - Francis B Adewoyin
- Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Osun State 220282, Nigeria
| | - Nusrat O Omisore
- Faculty of Pharmacy, Obafemi Awolowo University, Ile-Ife, Osun State 220282, Nigeria
| | - Alexander B Odaibo
- Department of Zoology, Faculty of Science, University of Ibadan, Ibadan, Oyo State 200005, Nigeria
| | - Yunjiang Feng
- Griffith Institute for Drug Discovery, Griffith University, Nathan, Queensland 4111, Australia
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11
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Ashour A, Sherif AE, El-Sayed SM, Kim JY, Jang DS, Anvari A, Farahat AA, Ibrahim SRM, Mohamed GA, Ainousah BE, Aljohani RF, Al-Hejaili RR, Khoja RH, Hassan AHE, Zaki AA. Tetraenone A: A New β-Ionone Derivative from Tetraena aegyptia. Metabolites 2023; 13:1202. [PMID: 38132884 PMCID: PMC10744760 DOI: 10.3390/metabo13121202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2023] [Revised: 11/15/2023] [Accepted: 11/17/2023] [Indexed: 12/23/2023] Open
Abstract
In this study, the chemical investigation of Tetraena aegyptia (Zygophyllaceae) led to the identification of a new megastigmene derivative, tetraenone A ((2S, 5R, 6R, 7E)-2-hydroxy-5,6-dihydro-β-ionone) (1), along with (3S, 5R, 6S, 7E)-3-hydroxy-5,6-epoxy-5,6-dihydro-β-ionone- (2), 3,4-dihydroxy-cinnamyl alcohol-4-glucoside (3), 3β,19α-dihydroxy-ursan-28-oic acid (4), quinovic acid (5), p-coumaric acid (6), and ferulic acid (7), for the first time. The chemical structures of 1-7 were confirmed by analysis of their 1D and 2D NMR and HRESIMS spectra and by their comparison with the relevant literature. The absolute configurations of 1 and 2 were assigned based on NOESY interactions and ECD spectra. Conformational analysis showed that 1 existed exclusively in one of the two theoretically possible chair conformers with a predominant s-trans configuration for the 3-oxobut-1-en-1-yl group with the ring, while the half-chair conformer had a pseudo-axial hydroxy group that was predominant over the other half-chair conformation. Boat conformations were not among the most stable conformations, and the s-trans isomerism was in favor of s-cis configuration. In silico investigation revealed that 1 and 2 had more favorable binding interactions with Mpro rather than with TMPRSS2. Accordingly, molecular dynamic simulations were performed on the complexes of compounds 1 and 2 with Mpro to explore the stability of their interaction with the target protein structure. Compounds 1 and 2 might offer a possible starting point for developing covalent inhibitors of Mpro of SARS-CoV-2.
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Affiliation(s)
- Ahmed Ashour
- Department of Pharmacognosy, Faculty of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
| | - Asmaa E. Sherif
- Department of Pharmacognosy, Faculty of Pharmacy, Prince Sattam Bin Abdulaziz University, Al-Kharj 11942, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
| | - Selwan M. El-Sayed
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
| | - Ji-Young Kim
- Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul 02447, Republic of Korea; (J.-Y.K.); (D.S.J.)
| | - Dae Sik Jang
- Department of Life and Nanopharmaceutical Sciences, Kyung Hee University, Seoul 02447, Republic of Korea; (J.-Y.K.); (D.S.J.)
| | - Abtin Anvari
- Master of Pharmaceutical Sciences Program, California Northstate University, 9700 W Taron Dr., Elk Grove, CA 95757, USA; (A.A.); (A.A.F.)
| | - Abdelbasset A. Farahat
- Master of Pharmaceutical Sciences Program, California Northstate University, 9700 W Taron Dr., Elk Grove, CA 95757, USA; (A.A.); (A.A.F.)
- Department of Pharmaceutical Organic Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt
| | - Sabrin R. M. Ibrahim
- Preparatory Year Program, Department of Chemistry, Batterjee Medical College, Jeddah 21442, Saudi Arabia;
- Department of Pharmacognosy, Faculty of Pharmacy, Assiut University, Assiut 71526, Egypt
| | - Gamal A. Mohamed
- Department of Natural Products and Alternative Medicine, Faculty of Pharmacy, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Bayan E. Ainousah
- Department of Pharmaceutical Sciences, Faculty of Pharmacy, Umm Al-Qura University, Makkah 21955, Saudi Arabia;
| | - Raghad F. Aljohani
- College of Pharmacy, Taibah University, Medina 42353, Saudi Arabia; (R.F.A.); (R.R.A.-H.); (R.H.K.)
| | - Razan R. Al-Hejaili
- College of Pharmacy, Taibah University, Medina 42353, Saudi Arabia; (R.F.A.); (R.R.A.-H.); (R.H.K.)
| | - Rahaf H. Khoja
- College of Pharmacy, Taibah University, Medina 42353, Saudi Arabia; (R.F.A.); (R.R.A.-H.); (R.H.K.)
| | - Ahmed H. E. Hassan
- Department of Medicinal Chemistry, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
| | - Ahmed A. Zaki
- Department of Pharmacognosy, Faculty of Pharmacy, Mansoura University, Mansoura 35516, Egypt;
- Department of Medicinal Chemistry, College of Pharmacy, University of Florida, Gainesville, FL 32610, USA
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12
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Virués-Segovia JR, Millán C, Pinedo C, González-Rodríguez VE, Papaspyrou S, Zorrilla D, Mackenzie TA, Ramos MC, de la Cruz M, Aleu J, Durán-Patrón R. New Eremophilane-Type Sesquiterpenes from the Marine Sediment-Derived Fungus Emericellopsis maritima BC17 and Their Cytotoxic and Antimicrobial Activities. Mar Drugs 2023; 21:634. [PMID: 38132955 PMCID: PMC10745059 DOI: 10.3390/md21120634] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2023] [Revised: 11/30/2023] [Accepted: 12/06/2023] [Indexed: 12/23/2023] Open
Abstract
The fungal strain BC17 was isolated from sediments collected in the intertidal zone of the inner Bay of Cadiz and characterized as Emericellopsis maritima. On the basis of the one strain-many compounds (OSMAC) approach, four new eremophilane-type sesquiterpenes (1-4), together with thirteen known derivatives (5-17) and two reported diketopiperazines (18, 19), were isolated from this strain. The chemical structures and absolute configurations of the new compounds were determined through extensive NMR and HRESIMS spectroscopic studies and ECD calculation. Thirteen of the isolated eremophilanes were examined for cytotoxic and antimicrobial activities. PR toxin (16) exhibited cytotoxic activity against HepG2, MCF-7, A549, A2058, and Mia PaCa-2 human cancer cell lines with IC50 values ranging from 3.75 to 33.44 µM. (+)-Aristolochene (10) exhibited selective activity against the fungal strains Aspergillus fumigatus ATCC46645 and Candida albicans ATCC64124 at 471 µM.
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Affiliation(s)
- Jorge R. Virués-Segovia
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (J.R.V.-S.); (C.M.); (C.P.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Carlos Millán
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (J.R.V.-S.); (C.M.); (C.P.)
| | - Cristina Pinedo
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (J.R.V.-S.); (C.M.); (C.P.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Victoria E. González-Rodríguez
- Laboratorio de Microbiología, Departamento de Biomedicina, Biotecnología y Salud Pública, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain;
| | - Sokratis Papaspyrou
- Departamento de Biología, Facultad de Ciencias del Mar y Ambientales, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain;
| | - David Zorrilla
- Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, Campus Universitario Puerto Real s/n, Puerto Real, 11510 Cádiz, Spain;
| | - Thomas A. Mackenzie
- Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Fundación MEDINA, 18016 Granada, Spain; (T.A.M.); (M.C.R.); (M.d.l.C.)
| | - María C. Ramos
- Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Fundación MEDINA, 18016 Granada, Spain; (T.A.M.); (M.C.R.); (M.d.l.C.)
| | - Mercedes de la Cruz
- Centro de Excelencia en Investigación de Medicamentos Innovadores en Andalucía, Fundación MEDINA, 18016 Granada, Spain; (T.A.M.); (M.C.R.); (M.d.l.C.)
| | - Josefina Aleu
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (J.R.V.-S.); (C.M.); (C.P.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Rosa Durán-Patrón
- Departamento de Química Orgánica, Facultad de Ciencias, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (J.R.V.-S.); (C.M.); (C.P.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
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13
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Ezzanad A, De los Reyes C, Macías-Sánchez AJ, Hernández-Galán R. Isolation and Identification of 12-Deoxyphorbol Esters from Euphorbia resinifera Berg Latex: Targeted and Biased Non-Targeted Identification of 12-Deoxyphorbol Esters by UHPLC-HRMS E. PLANTS (BASEL, SWITZERLAND) 2023; 12:3846. [PMID: 38005743 PMCID: PMC10674858 DOI: 10.3390/plants12223846] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/22/2023] [Revised: 11/03/2023] [Accepted: 11/07/2023] [Indexed: 11/26/2023]
Abstract
Diterpenes from the Euphorbia genus are known for their ability to regulate the protein kinase C (PKC) family, which mediates their ability to promote the proliferation of neural precursor cells (NPCs) or neuroblast differentiation into neurons. In this work, we describe the isolation from E. resinifera Berg latex of fifteen 12-deoxyphorbol esters (1-15). A triester of 12-deoxy-16-hydroxyphorbol (4) and a 12-deoxyphorbol 13,20-diester (13) are described here for the first time. Additionally, detailed structural elucidation is provided for compounds 3, 5, 6, 14 and 15. The absolute configuration for compounds 3, 4, 6, 13, 14 and 15 was established by the comparison of their theoretical and experimental electronic circular dichroism (ECD) spectra. Access to the above-described collection of 12-deoxyphorbol derivatives, with several substitution patterns and attached acyl moieties, allowed for the study of their fragmentation patterns in the collision-induced dissociation of multiple ions, without precursor ion isolation mass spectra experiments (HRMSE), which, in turn, revealed a correlation between specific substitution patterns and the fragmentation pathways in their HRMSE spectra. In turn, this allowed for a targeted UHPLC-HRMSE analysis and a biased non-targeted UHPLC-HRMSE analysis of 12-deoxyphorbols in E. resinifera latex which yielded the detection and identification of four additional 12-deoxyphorbols not previously isolated in the initial column fractionation work. One of them, identified as 12-deoxy-16-hydroxyphorbol 20-acetate 13-phenylacetate 16-propionate (20), has not been described before.
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Affiliation(s)
- Abdellah Ezzanad
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (A.E.); (C.D.l.R.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Carolina De los Reyes
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (A.E.); (C.D.l.R.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Antonio J. Macías-Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (A.E.); (C.D.l.R.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Rosario Hernández-Galán
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain; (A.E.); (C.D.l.R.)
- Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
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14
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Xia Z, Chen YZ, Xu CB, Zhu CG, Lei XQ, Guo QL, Shi JG. Diverse neolignans and lignans from an aqueous extract of the Angelica sinensis root head. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2023; 25:919-940. [PMID: 36748290 DOI: 10.1080/10286020.2023.2173181] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/23/2023] [Accepted: 01/23/2023] [Indexed: 06/18/2023]
Abstract
Neolignans and lignans with diverse new chemical structures, including eleven pairs of separated chiral enantiomers [(+)-/(-)-1-(+)-/(-)-5, (+)-/(-)-8, (+)-/(-)-10, and (+)-/(-)-12-(+)-/(-)-15], two achiral compounds (6 and 9), and an unseparated racemate [(±)-11], together with a new natural product (7) and 21 known derivatives, were isolated from an aqueous extract of the Angelica sinensis root head (guitou). Among the chiral isolates, (+)-/(-)-13 and (+)-/(-)-15 were scalemic pairs with enantiomeric ratios of around 3:1 and 1.5:1, respectively, while others were enantiomeric equivalent pairs. This indicates that the diverse neolignans in A. sinensis are biosynthesized via different pathways with varying degrees of stereo-controlled manners.
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Affiliation(s)
- Zhao Xia
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - You-Zhe Chen
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Cheng-Bo Xu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Cheng-Gen Zhu
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Xiao-Qiang Lei
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Qing-Lan Guo
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
| | - Jian-Gong Shi
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing 100050, China
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15
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Osadchuk I, Luts HE, Norvaiša K, Borovkov V, Senge MO. Supramolecular Chirogenesis in a Sterically Hindered Porphyrin: A Critical Theoretical Analysis. Chemistry 2023; 29:e202301408. [PMID: 37227167 DOI: 10.1002/chem.202301408] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2023] [Revised: 05/24/2023] [Accepted: 05/25/2023] [Indexed: 05/26/2023]
Abstract
The determination of molecular stereochemistry and absolute configuration is an important part of modern chemistry, pharmacology, and biology. Electronic circular dichroism (ECD) spectroscopy is a widely used tool for chirality assignment, especially with porphyrin macrocycles employed as reporter chromophores. However, the mechanisms of induced ECD in porphyrin complexes are yet to be comprehensively rationalized. In this work, the ECD spectra of a sterically hindered hexa-cationic porphyrin with two camphorsulfonic acids in dichloromethane and chloroform were experimentally measured and computationally analyzed. The influence of geometric factors such as the position of chiral guest molecules, distortion of the porphyrin macrocycle, and orientation of aromatic and non-aromatic peripheral substituents on the ECD spectra was theoretically studied. Various potential pitfalls, such as a lack of significant conformations and accidental agreement of experimental and simulated spectra, are considered and discussed.
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Affiliation(s)
- Irina Osadchuk
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Hanna-Eliisa Luts
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Karolis Norvaiša
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
| | - Victor Borovkov
- Department of Chemistry and Biotechnology, Tallinn University of Technology, Akadeemia tee 15, 12618, Tallinn, Estonia
| | - Mathias O Senge
- School of Chemistry, Chair of Organic Chemistry, Trinity Biomedical Sciences Institute, Trinity College Dublin, The University of Dublin, 152-160 Pearse Street, D02R590, Dublin, Ireland
- Institute for Advanced Study (TUM-IAS), Technical University of Munich, Lichtenberg Str. 2a, 85748, Garching, Germany
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16
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Li B, Wang X, Lin PC, Li JJ, Luan N, Wang YQ, Shang XY. Two unusual novel iridoid glycosides from Cornus officinalis fruit and their biological activities. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2023; 25:860-866. [PMID: 36523264 DOI: 10.1080/10286020.2022.2156341] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 12/04/2022] [Accepted: 12/04/2022] [Indexed: 06/17/2023]
Abstract
Two unusual novel iridoid glycosides, cornsecoside A (1) and cornsecoside B (2), were isolated from a 40% ethanol elution fraction of a 50% ethanol extract of Cornus officinalis fruit. Their structures were determined by spectroscopic data analysis combined with hydrolysis and ECD spectroscopy. In addition, compounds 1 and 2 exhibited cytotoxic activity against Bel-7402 cells with IC50 values of 8.12 and 9.31 µM, and were neuroprotective against H2O2-induced SH-SY5Y cell injure at a concentration of 10 µM.
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Affiliation(s)
- Bin Li
- Beijing Key laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China
- Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100193, China
| | - Xin Wang
- Beijing Key laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China
| | - Peng-Cheng Lin
- Qinghai Provincial Key Laboratory of Phytochemistry for Tibetan Plateau, Qinghai University for Nationalities, Xining 810000, China
| | - Jin-Jie Li
- Beijing Key laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China
| | - Na Luan
- Beijing Key laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China
| | - Yun-Qin Wang
- Beijing Key laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China
| | - Xiao-Ya Shang
- Beijing Key laboratory of Bioactive Substances and Functional Foods, Beijing Union University, Beijing 100191, China
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17
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Han EJ, Lee SR, Townsend CA, Seyedsayamdost MR. Targeted Discovery of Cryptic Enediyne Natural Products via FRET-Coupled High-Throughput Elicitor Screening. ACS Chem Biol 2023; 18:1854-1862. [PMID: 37463302 PMCID: PMC11062413 DOI: 10.1021/acschembio.3c00281] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/20/2023]
Abstract
Enediyne antibiotics are a striking family of DNA-cleaving natural products with high degrees of cytotoxicity and structural complexity. Microbial genome sequences, which have recently accumulated, point to an untapped trove of "cryptic" enediynes. Most of the cognate biosynthetic gene clusters (BGCs) are sparingly expressed under standard growth conditions, making it difficult to characterize their products. Herein, we report a fluorescence-based DNA cleavage assay coupled with high-throughput elicitor screening for the rapid, targeted discovery of cryptic enediyne metabolites. We applied the approach to Streptomyces clavuligerus, which harbors two such BGCs with unknown products, identified steroids as effective elicitors, and characterized 10 cryptic enediyne-derived natural products, termed clavulynes A-J with unusual carbonate and terminal olefin functionalities, with one of these congeners matching the recently reported jejucarboside. Our results contribute to the growing repertoire of enediynes and provide a blueprint for identifying additional ones in the future.
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Affiliation(s)
- Esther J Han
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Seoung Rak Lee
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
| | - Craig A Townsend
- Department of Chemistry, Johns Hopkins University, Baltimore, Maryland 21218, United States
| | - Mohammad R Seyedsayamdost
- Department of Chemistry, Princeton University, Princeton, New Jersey 08544, United States
- Department of Molecular Biology, Princeton University, Princeton, New Jersey 08544, United States
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18
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Liu W, Wu P, Song Z, Nie F, Zhang L, Lee D, Nakajima A, Xu J, Guo Y. Iridoids from Patrinia heterophylla and their anti-inflammatory activity. PHYTOCHEMISTRY 2023; 212:113720. [PMID: 37187247 DOI: 10.1016/j.phytochem.2023.113720] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 05/04/2023] [Accepted: 05/09/2023] [Indexed: 05/17/2023]
Abstract
A phytochemical investigation led to the isolation of five undescribed compounds (1-5) from the methanol extract of the rhizomes and roots of Patrinia heterophylla. The structures and configurations of these compounds were characterized by HRESIMS, ECD, and NMR data analyses. These compounds were assayed for their anti-inflammatory potential using LPS-stimulated BV-2 cells, of which compound 4 showed strong nitric oxide (NO) inhibitory effects with an IC50 of 6.48 μM. The potential anti-inflammatory mechanism was examined utilizing Western blotting and molecular docking. Further in vivo anti-inflammatory experiments revealed that compound 4 inhibited the production of NO and reactive oxygen species in the zebrafish model.
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Affiliation(s)
- Wenhui Liu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, And Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, PR China
| | - Peng Wu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, And Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, PR China
| | - Ziteng Song
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, And Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, PR China
| | - Fan Nie
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, And Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, PR China
| | - Liang Zhang
- State Key Laboratory of Tea Plant Biology and Utilization, Anhui Agricultural University, Hefei, 230036, PR China.
| | - Dongho Lee
- Department of Biosystems and Biotechnology, College of Life Sciences and Biotechnology, Korea University, Seoul, 136-713, Republic of Korea
| | - Akira Nakajima
- Department of Applied Biology and Food Sciences, Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, 036-8561, Japan
| | - Jing Xu
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, And Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, PR China.
| | - Yuanqiang Guo
- State Key Laboratory of Medicinal Chemical Biology, College of Pharmacy, And Tianjin Key Laboratory of Molecular Drug Research, Nankai University, Tianjin, 300350, PR China; Department of Applied Biology and Food Sciences, Faculty of Agriculture and Life Science, Hirosaki University, 3 Bunkyo-cho, Hirosaki, 036-8561, Japan.
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19
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Al Subeh Z, Flores-Bocanegra L, Raja HA, Burdette JE, Pearce CJ, Oberlies NH. Embellicines C-E: Macrocyclic Alkaloids with a Cyclopenta[b]fluorene Ring System from the Fungus Sarocladium sp. JOURNAL OF NATURAL PRODUCTS 2023; 86:596-603. [PMID: 36884371 PMCID: PMC10043936 DOI: 10.1021/acs.jnatprod.2c01048] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/18/2022] [Indexed: 06/18/2023]
Abstract
Macrocyclic alkaloids with a cyclopenta[b]fluorene ring system are a relatively young structural class of fungal metabolites, with the first members reported in 2013. Bioassay-guided fractionation of a Sarocladium sp. (fungal strain MSX6737) led to a series of both known and new members of this structural class (1-5), including the known embellicine A (1), three new embellicine analogues (2, 4, and 5), and a semisynthetic acetylated analogue (3). The structures were identified by examining both high-resolution electrospray ionization mass spectrometry data and one-dimensional and two-dimensional NMR spectra. The relative configurations of these molecules were established via 1H-1H coupling constants and nuclear Overhauser effect spectroscopy, while comparisons of the experimental electronic circular dichroism (ECD) spectra with the time-dependent density functional theory ECD calculations were utilized to assign their absolute configurations, which were in good agreement with the literature. These alkaloids (1-5) showed cytotoxic activity against a human breast cancer cell line (MDA-MB-231) that ranged from 0.4 to 4.8 μM. Compounds 1 and 5 were also cytotoxic against human ovarian (OVCAR3) and melanoma (MDA-MB-435) cancer cell lines.
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Affiliation(s)
- Zeinab
Y. Al Subeh
- Department
of Medicinal Chemistry and Pharmacognosy, Faculty of Pharmacy, Jordan University of Science and Technology, Irbid 22110, Jordan
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro 27402, North Carolina, United States
| | - Laura Flores-Bocanegra
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro 27402, North Carolina, United States
| | - Huzefa A. Raja
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro 27402, North Carolina, United States
| | - Joanna E. Burdette
- Department
of Pharmaceutical Sciences, University of
Illinois at Chicago, Chicago 60612, Illinois, United States
| | - Cedric J. Pearce
- Mycosynthetix,
Inc., Hillsborough 27278, North Carolina, United States
| | - Nicholas H. Oberlies
- Department
of Chemistry and Biochemistry, University
of North Carolina at Greensboro, Greensboro 27402, North Carolina, United States
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20
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Zhao Y, Gericke O, Li T, Kjaerulff L, Kongstad KT, Heskes AM, Møller BL, Jørgensen FS, Venter H, Coriani S, Semple SJ, Staerk D. Polypharmacology-Labeled Molecular Networking: An Analytical Technology Workflow for Accelerated Identification of Multiple Bioactive Constituents in Complex Extracts. Anal Chem 2023; 95:4381-4389. [PMID: 36802535 DOI: 10.1021/acs.analchem.2c04859] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2023]
Abstract
Discovery of sustainable and benign-by-design drugs to combat emerging health pandemics calls for new analytical technologies to explore the chemical and pharmacological properties of Nature's unique chemical space. Here, we present a new analytical technology workflow, polypharmacology-labeled molecular networking (PLMN), where merged positive and negative ionization tandem mass spectrometry-based molecular networking is linked with data from polypharmacological high-resolution inhibition profiling for easy and fast identification of individual bioactive constituents in complex extracts. The crude extract of Eremophila rugosa was subjected to PLMN analysis for the identification of antihyperglycemic and antibacterial constituents. Visually easy-interpretable polypharmacology scores and polypharmacology pie charts as well as microfractionation variation scores of each node in the molecular network provided direct information about each constituent's activity in the seven assays included in this proof-of-concept study. A total of 27 new non-canonical nerylneryl diphosphate-derived diterpenoids were identified. Serrulatane ferulate esters were shown to be associated with antihyperglycemic and antibacterial activities, including some showing synergistic activity with oxacillin in clinically relevant (epidemic) methicillin-resistant Staphylococcus aureus strains and some showing saddle-shaped binding to the active site of protein-tyrosine phosphatase 1B. PLMN is scalable in the number and types of assays included and thus holds potential for a paradigm shift toward polypharmacological natural-products-based drug discovery.
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Affiliation(s)
- Yong Zhao
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Oliver Gericke
- Department of Plant and Environment Sciences, Faculty of Sciences, Plant Biochemistry Laboratory, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Tuo Li
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Louise Kjaerulff
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Kenneth T Kongstad
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Allison Maree Heskes
- Department of Plant and Environment Sciences, Faculty of Sciences, Plant Biochemistry Laboratory, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Birger Lindberg Møller
- Department of Plant and Environment Sciences, Faculty of Sciences, Plant Biochemistry Laboratory, University of Copenhagen, Thorvaldsensvej 40, Frederiksberg C 1871, Denmark
| | - Flemming Steen Jørgensen
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
| | - Henrietta Venter
- Clinical and Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australian
| | - Sonia Coriani
- Department of Chemistry, Technical University of Denmark, Kemitorvet Building 207, Kgs. Lyngby DK-2800, Denmark
| | - Susan J Semple
- Clinical and Health Sciences, University of South Australia, Adelaide, South Australia 5000, Australian
| | - Dan Staerk
- Department of Drug Design and Pharmacology, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, Copenhagen DK-2100, Denmark
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21
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Fernandes C, Ribeiro R, Pinto M, Kijjoa A. Absolute Stereochemistry Determination of Bioactive Marine-Derived Cyclopeptides by Liquid Chromatography Methods: An Update Review (2018-2022). Molecules 2023; 28:615. [PMID: 36677673 PMCID: PMC9867211 DOI: 10.3390/molecules28020615] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2022] [Revised: 01/03/2023] [Accepted: 01/04/2023] [Indexed: 01/11/2023] Open
Abstract
Cyclopeptides are considered as one of the most important classes of compounds derived from marine sources, due to their structural diversity and a myriad of their biological and pharmacological activities. Since marine-derived cyclopeptides consist of different amino acids, many of which are non-proteinogenic, they possess various stereogenic centers. In this respect, the structure elucidation of new molecular scaffolds obtained from natural sources, including marine-derived cyclopeptides, can become a very challenging task. The determination of the absolute configurations of the amino acid residues is accomplished, in most cases, by performing acidic hydrolysis, followed by analyses by liquid chromatography (LC). In a continuation with the authors' previous publication, and to analyze the current trends, the present review covers recently published works (from January 2018 to November 2022) regarding new cyclopeptides from marine organisms, with a special focus on their biological/pharmacological activities and the absolute stereochemical assignment of the amino acid residues. Ninety-one unreported marine-derived cyclopeptides were identified during this period, most of which displayed anticancer or antimicrobial activities. Marfey's method, which involves LC, was found to be the most frequently used for this purpose.
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Affiliation(s)
- Carla Fernandes
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
| | - Ricardo Ribeiro
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
| | - Madalena Pinto
- Laboratório de Química Orgânica e Farmacêutica, Departamento de Ciências Químicas, Faculdade de Farmácia, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
| | - Anake Kijjoa
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR), Edifício do Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos s/n, 4050-208 Matosinhos, Portugal
- ICBAS-Instituto de Ciências Biomédicas Abel Salazar, Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
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22
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Feineis D, Bringmann G. Asian Ancistrocladus Lianas as Creative Producers of Naphthylisoquinoline Alkaloids. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2023; 119:1-335. [PMID: 36587292 DOI: 10.1007/978-3-031-10457-2_1] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
This book describes a unique class of secondary metabolites, the mono- and dimeric naphthylisoquinoline alkaloids. They occur in lianas of the paleotropical Ancistrocladaceae and Dioncophyllaceae families, exclusively. Their unprecedented structures include stereogenic centers and rotationally hindered, and thus likewise stereogenic, axes. Extended recent investigations on six Ancistrocladus species from Asia, as reported in this review, shed light on their fascinating phytochemical productivity, with over 100 such intriguing natural products. This high chemodiversity arises from a likewise unique biosynthesis from acetate-malonate units, following a novel polyketidic pathway to plant-derived isoquinoline alkaloids. Some of the compounds show most promising antiparasitic activities. Likewise presented are strategies for the regio- and stereoselective total synthesis of the alkaloids, including the directed construction of the chiral axis.
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Affiliation(s)
- Doris Feineis
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany
| | - Gerhard Bringmann
- Institute of Organic Chemistry, University of Würzburg, Am Hubland, 97074, Würzburg, Germany.
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23
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Wang AZ, Han H, Fang QQ, Tan CH. Structurally diverse polycyclic polyprenylated acylphloroglucinols with protective effect on human vein endothelial cells injured by high-glucose from Hypericum acmosepalum N. Robson. PHYTOCHEMISTRY 2023; 205:113482. [PMID: 36309111 DOI: 10.1016/j.phytochem.2022.113482] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2022] [Revised: 10/16/2022] [Accepted: 10/17/2022] [Indexed: 06/16/2023]
Abstract
Hyperacmotone A, a polycyclic polyprenylated acylphloroglucinol (PPAP) with an unprecedented skeleton, along with five undescribed congeners and eleven reported ones, was isolated from Hypericum acmosepalum. Hyperacmotone A possesses a unique monocyclic ring skeleton based on a cyclopent-4-ene-1,3-dione acylphloroglucinol core. Their structures were elucidated by extensive analysis of HRESIMS, NMR, biogenetic pathway, and quantum-chemical calculations. In addition, hypercohone G exhibited significant protective effects on high-glucose-injured HUVECs.
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Affiliation(s)
- Ai-Zhu Wang
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China; School of Medicine, Tongji University, Shanghai, 200092, China
| | - Hua Han
- School of Medicine, Tongji University, Shanghai, 200092, China.
| | - Qiang-Qiang Fang
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China
| | - Chang-Heng Tan
- Natural Product Research Center, Shanghai Institute of Materia Medica, Chinese Academy of Sciences, Shanghai, 201203, China.
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24
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Han EJ, Lee SR, Hoshino S, Seyedsayamdost MR. Targeted Discovery of Cryptic Metabolites with Antiproliferative Activity. ACS Chem Biol 2022; 17:3121-3130. [PMID: 36228140 PMCID: PMC10171914 DOI: 10.1021/acschembio.2c00588] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
Microorganisms have provided a rich source of therapeutically valuable natural products. Recent advances in whole genome sequencing and bioinformatics have revealed immense untapped potential for new natural products in the form of silent or "cryptic" biosynthetic genes. We herein conducted high-throughput elicitor screening (HiTES) in conjunction with cytotoxicity assays against selected cancer cell lines with the goal of uncovering otherwise undetectable cryptic metabolites with antiproliferative activity. Application to Streptomyces clavuligerus facilitated identification of clavamates A and B, two bioactive metabolites with unusual structural features, as well as facile activation of a gene cluster coding for tunicamycin, which exhibited strong growth-inhibitory activity. The elicitor we identified was pleiotropic, additionally leading to the discovery of a modified, bicyclic pentapeptide natural product. Our results highlight the utility of this approach in identifying new molecules with antiproliferative activity from even overexploited microbial strains.
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Affiliation(s)
- Esther J. Han
- Department of Chemistry, Princeton University, Princeton, NJ 08544, United States
- These authors contributed equally
| | - Seoung Rak Lee
- Department of Chemistry, Princeton University, Princeton, NJ 08544, United States
- These authors contributed equally
| | - Shotaro Hoshino
- Department of Chemistry, Princeton University, Princeton, NJ 08544, United States
| | - Mohammad R. Seyedsayamdost
- Department of Chemistry, Princeton University, Princeton, NJ 08544, United States
- Department of Molecular Biology, Princeton University, Princeton, NJ 08544, United States
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25
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Du K, Zhang Z, Jing D, Wang Y, Li X, Meng D. Diterpene glycosides, acetophenone glycosides and tannins from polar extracts of the root of Euphorbia fischeriana with cytotoxicity and antibacterial activities. PHYTOCHEMISTRY 2022; 203:113382. [PMID: 36007663 DOI: 10.1016/j.phytochem.2022.113382] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/25/2022] [Revised: 08/10/2022] [Accepted: 08/14/2022] [Indexed: 06/15/2023]
Abstract
The phytochemical study on Euphorbia fischeriana, a folk medicinal plant in China, led to the isolation of eight undescribed glycosides, including two diterpene glycosides, three acetophenone glycosides and three tannins together with eight known ones. Their planar structures were elucidated by extensive analyses of 1D, 2D NMR experiments and HRESIMS. The absolute configurations were determined by NOESY experiments, ECD calculations. All undescribed compounds were evaluated for their cytotoxicity and antibacterial activities in vitro. Two diterpene glycosides (1-2) showed cytotoxic activity with IC50 values ranging from 5.4 to 16.2 μM toward Hep-G2, Hep-3B, A549, NCI-H460 and AGS cells. Tannins (6-8) showed the significant antibacterial activity with MIC values in the range of 1.56-6.25 μg/mL.
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Affiliation(s)
- Kaicheng Du
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Zhiqi Zhang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Di Jing
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Yumeng Wang
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Xingyao Li
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China
| | - Dali Meng
- School of Traditional Chinese Materia Medica, Shenyang Pharmaceutical University, Shenyang 110016, PR China.
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26
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Zulfiqar F, Pandey P, Tripathi SK, Ali Z, Chittiboyina AG, Khan IA. Benzoylcyclopropane Derivatives from Hypoxis hemerocallidea Corms. PLANTA MEDICA 2022; 88:685-692. [PMID: 34331304 DOI: 10.1055/a-1540-4978] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
Two monobenzoylcyclopropane (hypoxhemerol A (1: ) and hypoxhemeroloside G (2: )) and three dibenzoylcyclopropane (hypoxhemerol B (3: ), hypoxhemeroloside H (4: ), and hypoxhemeroloside I (5: )) derivatives were isolated from the hydro-alcoholic extract of Hypoxis hemerocallidea corms. This is the first instance where benzoylcyclopropane analogs were isolated from any natural source. Structure elucidation was mainly based on 1D- and 2D-NMR and HRESIMS data. The absolute configuration (2R, 4R) of 1: was determined via NOESY NMR and experimental and calculated ECD data analyses. Compounds 1: -5: and 11 recently reported metabolites (hypoxoside, obtuside A, interjectin, acuminoside, curcapicycloside, and hypoxhemerolosides A - F) were screened for in vitro antimicrobial activity against various bacterial and fungal strains. Curcapicycloside and acuminoside exhibited antibacterial activity against Escherichia coli with 78 and 79% inhibition at 20 µg/mL, respectively. Hypoxhemeroloside A showed mild antifungal activity against Cryptococcus neoformans with 63% inhibition at 20 µg/mL.
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Affiliation(s)
- Fazila Zulfiqar
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Pankaj Pandey
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Siddharth K Tripathi
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Zulfiqar Ali
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Amar G Chittiboyina
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA
| | - Ikhlas A Khan
- National Center for Natural Products Research, School of Pharmacy, University of Mississippi, University, MS, USA
- Division of Pharmacognosy, Department of BioMolecular Sciences, School of Pharmacy, University of Mississippi, University, MS, USA
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27
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Pinto AA, Barúa JE, Almeida MO, Viaud M, Zorrilla D, Collado IG, Macías-Sánchez AJ, Durán-Patrón R. Structural and biosynthetic studies of botrycinereic acid, a new cryptic metabolite from the fungus Botrytis cinerea. Bioorg Chem 2022; 127:105979. [PMID: 35753117 DOI: 10.1016/j.bioorg.2022.105979] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 06/17/2022] [Indexed: 11/28/2022]
Abstract
Chemical epigenetic manipulation of Botrytis cinerea strain B05.10 with the histone deacetylase inhibitor SAHA led to the isolation of a new cryptic metabolite, botrycinereic acid (22a). This compound was also overproduced by inactivating the stc2 gene, which encodes an unknown sesquiterpene cyclase. Its structure and absolute configuration were determined by extensive spectroscopic NMR and HRESIMS studies, and electronic circular dichroism calculations. Its biosynthesis was studied by feeding 2H and 13C isotopically labeled precursors to B. cinerea Δstc2 mutant. A detailed analysis of the labeling and coupling patterns into botrycinereic acid (22a) revealed that this compound derives from l-phenylalanine and l-leucine.
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Affiliation(s)
- Ana A Pinto
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Javier E Barúa
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Marilia O Almeida
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Muriel Viaud
- Université Paris-Saclay, INRAE, UR BIOGER, INRA, 78850 Grignon, France
| | - David Zorrilla
- Departamento de Química Física, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain
| | - Isidro G Collado
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain; Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain
| | - Antonio J Macías-Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain; Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain.
| | - Rosa Durán-Patrón
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Puerto Real, Universidad de Cádiz, 11510 Puerto Real, Cádiz, Spain; Instituto de Investigación en Biomoléculas (INBIO), Universidad de Cádiz, Puerto Real, 11510 Cádiz, Spain.
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28
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Zhou H, Han JT, Nöthling N, Lindner MM, Jenniches J, Kühn C, Tsuji N, Zhang L, List B. Organocatalytic Asymmetric Synthesis of Si-Stereogenic Silyl Ethers. J Am Chem Soc 2022; 144:10156-10161. [PMID: 35649270 PMCID: PMC9490845 DOI: 10.1021/jacs.2c04261] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2022] [Indexed: 01/15/2023]
Abstract
Functionalized enantiopure organosilanes are important building blocks with applications in various fields of chemistry; nevertheless, asymmetric synthetic methods for their preparation are rare. Here we report the first organocatalytic enantioselective synthesis of tertiary silyl ethers possessing "central chirality" on silicon. The reaction proceeds via a desymmetrizing carbon-carbon bond forming silicon-hydrogen exchange reaction of symmetrical bis(methallyl)silanes with phenols using newly developed imidodiphosphorimidate (IDPi) catalysts. A variety of enantiopure silyl ethers was obtained in high yields with good chemo- and enantioselectivities and could be readily derivatized to several useful chiral silicon compounds, leveraging the olefin functionality and the leaving group nature of the phenoxy substituent.
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Affiliation(s)
- Hui Zhou
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Jung Tae Han
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Nils Nöthling
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Monika M. Lindner
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Judith Jenniches
- Innovation
Center, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Clemens Kühn
- Innovation
Center, Merck KGaA, Frankfurter Straße 250, 64293 Darmstadt, Germany
| | - Nobuya Tsuji
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
| | - Li Zhang
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
| | - Benjamin List
- Max-Planck-Institut
für Kohlenforschung, Kaiser-Wilhelm-Platz 1, 45470 Mülheim an der Ruhr, Germany
- Institute
for Chemical Reaction Design and Discovery (WPI-ICReDD), Hokkaido University, Sapporo 001-0021, Japan
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29
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He HK, Li X, Yang SL, Tian MY, Zhang QR, Zhang N, Hou Q, Lin MB, Wang SJ. A full set of 8,4'-oxy-8'-phenylneolignan stereoisomers from Sophora tonkinensis and their absolute configurations by TDDFT. PHYTOCHEMISTRY 2022; 197:113135. [PMID: 35181314 DOI: 10.1016/j.phytochem.2022.113135] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2021] [Revised: 01/15/2022] [Accepted: 02/11/2022] [Indexed: 06/14/2023]
Abstract
A full set of 8,4'-oxy-8'-phenylneolignans with four chiral carbons, named (+)/(-)-leptolepisols D1‒D2 and (+)/(-)-sophorols A‒F, were isolated from the roots and rhizomes of Sophora tonkinensis Gagnep., including 14 previously undescribed stereoisomers, along with 2 known leptolepisol D diastereomers. Their planar structures and relative configurations were elucidated by detailed spectroscopic analysis (HRESIMS and NMR). Based on a highly accurate conformer filtering protocol at low computational cost, the absolute configurations of full set 8,4'-oxy-8'-phenylneolignans were completely assigned by TDDFT calculations of ECD spectra for the first time. Furthermore, (+)/(-)-sophorol A, (-)-sophorol B, and (-)-sophorol E could moderately suppress the lipopolysaccharide-induced nitric oxide production in murine macrophages at 10 μM, with inhibitory ratios of 48.4-52.9%.
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Affiliation(s)
- Hao-Ke He
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Xin Li
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Sheng-Li Yang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Meng-Yin Tian
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Qian-Ru Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Ning Zhang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Qi Hou
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Ming-Bao Lin
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China
| | - Su-Juan Wang
- State Key Laboratory of Bioactive Substance and Function of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, 100050, China.
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Qin Y, Liu S, Zou Q, Cai X, Guo Z, Yu L, Wang J, Deng Z. Naphthoquinones from Catalpa bungei “Jinsi” as potent antiproliferation agents inducing DNA damage. Fitoterapia 2022; 160:105196. [DOI: 10.1016/j.fitote.2022.105196] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2022] [Revised: 04/07/2022] [Accepted: 04/09/2022] [Indexed: 11/04/2022]
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Sevik Kilicaslan O, Cretton S, Quirós-Guerrero L, Bella MA, Kaiser M, Mäser P, Ndongo JT, Cuendet M. Isolation and Structural Elucidation of Compounds from Pleiocarpa bicarpellata and Their In Vitro Antiprotozoal Activity. Molecules 2022; 27:2200. [PMID: 35408605 PMCID: PMC9000413 DOI: 10.3390/molecules27072200] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2022] [Revised: 03/23/2022] [Accepted: 03/24/2022] [Indexed: 12/07/2022] Open
Abstract
Species of the genus Pleiocarpa are used in traditional medicine against fever and malaria. The present study focuses on the isolation and identification of bioactive compounds from P. bicarpellata extracts, and the evaluation of their antiprotozoal activity. Fractionation and isolation combined to LC-HRMS/MS-based dereplication provided 16 compounds: seven indole alkaloids, four indoline alkaloids, two secoiridoid glycosides, two iridoid glycosides, and one phenolic glucoside. One of the quaternary indole alkaloids (7) and one indoline alkaloid (15) have never been reported before. Their structures were elucidated by analysis of spectroscopic data, including 1D and 2D NMR experiments, UV, IR, and HRESIMS data. The absolute configurations were determined by comparison of the experimental and calculated ECD data. The extracts and isolated compounds were evaluated for their antiprotozoal activity towards Trypanosoma brucei rhodesiense, Trypanosoma cruzi, Leishmania donovani, and Plasmodium falciparum, as well as for their cytotoxicity against rat skeletal myoblast L6 cells. The dichloromethane/methanol (1:1) root extract showed strong activity against P. falciparum (IC50 value of 3.5 µg/mL). Among the compounds isolated, tubotaiwine (13) displayed the most significant antiplasmodial activity with an IC50 value of 8.5 µM and a selectivity index of 23.4. Therefore, P. bicarpallata extract can be considered as a source of indole alkaloids with antiplasmodial activity.
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Affiliation(s)
- Ozlem Sevik Kilicaslan
- School of Pharmaceutical Sciences, University of Geneva, 1211 Geneva, Switzerland; (O.S.K.); (S.C.); (L.Q.-G.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1211 Geneva, Switzerland
| | - Sylvian Cretton
- School of Pharmaceutical Sciences, University of Geneva, 1211 Geneva, Switzerland; (O.S.K.); (S.C.); (L.Q.-G.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1211 Geneva, Switzerland
| | - Luis Quirós-Guerrero
- School of Pharmaceutical Sciences, University of Geneva, 1211 Geneva, Switzerland; (O.S.K.); (S.C.); (L.Q.-G.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1211 Geneva, Switzerland
| | - Merveilles A. Bella
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé 1, Yaoundé P.O. Box 47, Cameroon; (M.A.B.); (J.T.N.)
| | - Marcel Kaiser
- Swiss Tropical and Public Health Institute, 4002 Basel, Switzerland; (M.K.); (P.M.)
- University of Basel, 4003 Basel, Switzerland
| | - Pascal Mäser
- Swiss Tropical and Public Health Institute, 4002 Basel, Switzerland; (M.K.); (P.M.)
- University of Basel, 4003 Basel, Switzerland
| | - Joseph T. Ndongo
- Department of Chemistry, Higher Teacher Training College, University of Yaoundé 1, Yaoundé P.O. Box 47, Cameroon; (M.A.B.); (J.T.N.)
| | - Muriel Cuendet
- School of Pharmaceutical Sciences, University of Geneva, 1211 Geneva, Switzerland; (O.S.K.); (S.C.); (L.Q.-G.)
- Institute of Pharmaceutical Sciences of Western Switzerland, University of Geneva, 1211 Geneva, Switzerland
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32
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Park J, Li Y, Moon K, Han EJ, Lee SR, Seyedsayamdost MR. Structural Elucidation of Cryptic Algaecides in Marine Algal‐Bacterial Symbioses by NMR Spectroscopy and MicroED. Angew Chem Int Ed Engl 2022. [DOI: 10.1002/ange.202114022] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jong‐Duk Park
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | - Yuchen Li
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | - Kyuho Moon
- Department of Chemistry Princeton University Princeton NJ 08544 USA
- College of Pharmacy Chonnam National University Gwangju 61186 South Korea
| | - Esther J. Han
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | - Seoung Rak Lee
- Department of Chemistry Princeton University Princeton NJ 08544 USA
| | - Mohammad R. Seyedsayamdost
- Department of Chemistry Princeton University Princeton NJ 08544 USA
- Department of Molecular Biology Princeton University Princeton NJ 08544 USA
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Lim HJ, An JS, Bae ES, Cho E, Hwang S, Nam SJ, Oh KB, Lee SK, Oh DC. Ligiamycins A and B, Decalin-Amino-Maleimides from the Co-Culture of Streptomyces sp. and Achromobacter sp. Isolated from the Marine Wharf Roach, Ligia exotica. Mar Drugs 2022; 20:83. [PMID: 35200613 PMCID: PMC8878407 DOI: 10.3390/md20020083] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/08/2022] [Accepted: 01/11/2022] [Indexed: 02/04/2023] Open
Abstract
Streptomyces sp. GET02.ST and Achromobacter sp. GET02.AC were isolated together from the gut of the wharf roach, Ligia exotica, inhabiting the intertidal zone of the west coast of Korea. The co-cultivation of these two strains significantly induced the production of two new metabolites, ligiamycins A (1) and B (2), which were barely detected in the single culture of Streptomyces sp. GET02.ST. The planar structures of ligiamycins A (1) and B (2) were elucidated as new decalins coupled with amino-maleimides by the analysis of various spectroscopic data, including nuclear magnetic resonance (NMR), ultraviolet (UV), and mass (MS) data. The assignment of two nitrogen atoms in amino-maleimide in 1 was accomplished based on 1H-15N heteroatom single quantum coherence spectroscopy (HSQC) NMR experiments. The relative configurations of the ligiamycins were determined using rotating frame Overhauser effect spectroscopy (ROESY) NMR data, and their absolute configurations were deduced by comparing their experimental and calculated optical rotations. Ligiamycin A (1) displayed antibacterial effects against Staphylococcus aureus and Salmonella enterica, while ligiamycin B (2) exhibited mild cell cytotoxicity against human colorectal cancer cells.
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Affiliation(s)
- Hyung-Ju Lim
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Joon Soo An
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Eun Seo Bae
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Eunji Cho
- Department of Agriculture Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (K.-B.O.)
| | - Sunghoon Hwang
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Sang-Jip Nam
- Department of Chemistry and Nanoscience, Ewha Womans University, Seoul 03760, Korea;
| | - Ki-Bong Oh
- Department of Agriculture Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 08826, Korea; (E.C.); (K.-B.O.)
| | - Sang Kook Lee
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
| | - Dong-Chan Oh
- Natural Products Research Institute, College of Pharmacy, Seoul National University, Seoul 08826, Korea; (H.-J.L.); (J.S.A.); (E.S.B.); (S.H.); (S.K.L.)
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34
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Park JD, Li Y, Moon K, Han EJ, Lee SR, Seyedsayamdost MR. Structural Elucidation of Cryptic Algaecides in Marine Algal-Bacterial Symbioses by NMR Spectroscopy and MicroED. Angew Chem Int Ed Engl 2021; 61:e202114022. [PMID: 34852184 DOI: 10.1002/anie.202114022] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2021] [Indexed: 11/06/2022]
Abstract
Microbial secondary metabolite discovery is often conducted in pure monocultures. In a natural setting, however, where metabolites are constantly exchanged, biosynthetic precursors are likely provided by symbionts or hosts. In the current work, we report eight novel and architecturally unusual secondary metabolites synthesized by the bacterial symbiont Phaeobacter inhibens from precursors that, in a native context, would be provided by their algal hosts. Three of these were produced at low titres and their structures were determined de novo using the emerging microcrystal electron diffraction method. Some of the new metabolites exhibited potent algaecidal activity suggesting that the bacterial symbiont can convert algal precursors, tryptophan and sinapic acid, into complex cytotoxins. Our results have important implications for the parasitic phase of algal-bacterial symbiotic interactions.
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Affiliation(s)
- Jong-Duk Park
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Yuchen Li
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Kyuho Moon
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.,College of Pharmacy, Chonnam National University, Gwangju, 61186, South Korea
| | - Esther J Han
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Seoung Rak Lee
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA
| | - Mohammad R Seyedsayamdost
- Department of Chemistry, Princeton University, Princeton, NJ 08544, USA.,Department of Molecular Biology, Princeton University, Princeton, NJ 08544, USA
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35
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Osadchuk I, Aav R, Borovkov V, Clot E. Chirogenesis in Zinc Porphyrins: Theoretical Evaluation of Electronic Transitions, Controlling Structural Factors and Axial Ligation. Chemphyschem 2021; 22:1817-1833. [PMID: 34213815 PMCID: PMC8457158 DOI: 10.1002/cphc.202100345] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 06/24/2021] [Indexed: 12/15/2022]
Abstract
In the present work, sixteen different zinc porphyrins (possessing different meso substituents) with and without a chiral guest were modelled using DFT and TD-DFT approaches in order to understand the influence of various controlling factors on electronic circular dichroism (ECD) spectra. Two major aspects are influenced by these factors: excitation energy of the electronic transitions and their intensity. In the case of excitation energy, the influence increases in the following order: orientation of the peripheral substituents
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Affiliation(s)
- Irina Osadchuk
- Department of Chemistry and BiotechnologySchool of ScienceTallinn University of Technology AddressAkadeemia tee 1512618TallinnEstonia
- ICGMUniv MontpellierCNRS, ENSCMMontpellierFrance
| | - Riina Aav
- Department of Chemistry and BiotechnologySchool of ScienceTallinn University of Technology AddressAkadeemia tee 1512618TallinnEstonia
| | - Victor Borovkov
- Department of Chemistry and BiotechnologySchool of ScienceTallinn University of Technology AddressAkadeemia tee 1512618TallinnEstonia
| | - Eric Clot
- ICGMUniv MontpellierCNRS, ENSCMMontpellierFrance
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36
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Chen L, Liu M, Yang S, Zhao H, Yao X, Li X, Meng J. Theoretical electronic circular dichroism investigations of chiral amino acids and development of separation and identification methods independent of standards. J Chromatogr A 2021; 1654:462446. [PMID: 34384924 DOI: 10.1016/j.chroma.2021.462446] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 07/13/2021] [Accepted: 07/26/2021] [Indexed: 02/07/2023]
Abstract
Through an appropriate computational protocol and environmental simulation, a satisfactory fit was observed for the theoretical electronic circular dichroism (ECD) spectra of 19 chiral amino acids (AAs), which correspondeds to the forms of the AAs in aqueous solution. Methods for enantioseparation of these chiral AAs by capillary electrophoresis (CE) and high-performance liquid chromatography (HPLC) were developed. Combining ECD with chromatographic separation methods, enantiomers were identified and quantified independent of a single enantiomer standard.
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Affiliation(s)
- Lixia Chen
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Mingxia Liu
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Sen Yang
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Hong Zhao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xin Yao
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China
| | - Xiangjun Li
- School of Chemical Sciences, University of Chinese Academy of Sciences, Beijing, 100049, China.
| | - Jinghua Meng
- Department of Mathematics, Xinzhou Teachers University, Xinzhou, Shanxi 034000, China
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37
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Qader M, Zaman KHAU, Hu Z, Wang C, Wu X, Cao S. Aspochalasin H1: A New Cyclic Aspochalasin from Hawaiian Plant-Associated Endophytic Fungus Aspergillus sp. FT1307. Molecules 2021; 26:4239. [PMID: 34299514 PMCID: PMC8307934 DOI: 10.3390/molecules26144239] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 07/07/2021] [Accepted: 07/09/2021] [Indexed: 11/24/2022] Open
Abstract
Aspergillus is one of the most diverse genera, and it is chemically profound and known to produce many biologically active secondary metabolites. In the present study, a new aspochalasin H1 (1), together with nine known compounds (2-10), were isolated from a Hawaiian plant-associated endophytic fungus Aspergillus sp. FT1307. The structures were elucidated using nuclear magnetic resonance (NMR) (1H, 1H-1H COSY, HSQC, HMBC, ROESY and 1D NOE), high-resolution electrospray ionization mass spectroscopy (HRESIMS), and comparisons with the reported literature. The absolute configuration of the new compound was established by electronic circular dichroism (ECD) in combination with NMR calculations. The new compound contains an epoxide moiety and an adjacent trans-diol, which has not been reported before in the aspochalasin family. The antibacterial screening of the isolated compounds was carried out against pathogenic bacteria (Staphylococcus aureus, Methicillin-resistant S. aureus and Bacillus subtilis). The antiproliferative activity of compounds 1-10 was evaluated against human breast cancer cell lines (MCF-7 and T46D) and ovarian cancer cell lines (A2780).
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Affiliation(s)
- Mallique Qader
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, Hilo, HI 96720, USA; (M.Q.); (K.A.U.Z.); (C.W.); (X.W.)
| | - KH Ahammad Uz Zaman
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, Hilo, HI 96720, USA; (M.Q.); (K.A.U.Z.); (C.W.); (X.W.)
| | - Zhenquan Hu
- Warshel Institute for Computational Biology, The Chinese University of Hong Kong, Shenzhen 518172, China;
- School of Chemistry and Materials Science, University of Science and Technology of China, Hefei 230026, China
| | - Cong Wang
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, Hilo, HI 96720, USA; (M.Q.); (K.A.U.Z.); (C.W.); (X.W.)
- Guangxi Key Laboratory of Chemistry and Chemical Engineering of Forest Products, School of Chemistry for Nationalities, Nanning 530006, China
| | - Xiaohua Wu
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, Hilo, HI 96720, USA; (M.Q.); (K.A.U.Z.); (C.W.); (X.W.)
| | - Shugeng Cao
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai’i at Hilo, Hilo, HI 96720, USA; (M.Q.); (K.A.U.Z.); (C.W.); (X.W.)
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38
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Chini MG, Lauro G, Bifulco G. Addressing the Target Identification and Accelerating the Repositioning of Anti‐Inflammatory/Anti‐Cancer Organic Compounds by Computational Approaches. European J Org Chem 2021. [DOI: 10.1002/ejoc.202100245] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Maria Giovanna Chini
- Department of Biosciences and Territory University of Molise C.da Fonte Lappone 86090 Pesche (IS) Italy
| | - Gianluigi Lauro
- Department of Pharmacy University of Salerno Via Giovanni Paolo II 132 84084 Fisciano (SA) Italy
| | - Giuseppe Bifulco
- Department of Pharmacy University of Salerno Via Giovanni Paolo II 132 84084 Fisciano (SA) Italy
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Luo G, Zheng L, Wu Q, Chen S, Li J, Liu L. Fusarins G-L with Inhibition of NO in RAW264.7 from Marine-Derived Fungus Fusarium solani 7227. Mar Drugs 2021; 19:md19060305. [PMID: 34070447 PMCID: PMC8226964 DOI: 10.3390/md19060305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2021] [Revised: 05/20/2021] [Accepted: 05/22/2021] [Indexed: 11/20/2022] Open
Abstract
Six new fusarin derivatives, fusarins G–L (1–6), together with five known compounds (5–11) were isolated from the marine-derived fungus Fusarium solani 7227. The structures of the new compounds were elucidated by means of comprehensive spectroscopic methods (1D and 2D NMR, HRESIMS, ECD, and ORC) and X-ray crystallography. Compounds 5–11 exhibited potent anti-inflammatory activity by inhibiting the production of NO in RAW264.7 cells activated by lipopolysaccharide, with IC50 values ranging from 3.6 to 32.2 μM. The structure–activity relationships of the fusarins are discussed herein.
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Affiliation(s)
- Guangyuan Luo
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Li Zheng
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Qilin Wu
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Senhua Chen
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
| | - Jing Li
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
- Guangdong Provincial Key Laboratory of Marine Resources and Coastal Engineering, Zhuhai 519082, China
- Correspondence:
| | - Lan Liu
- School of Marine Sciences, Sun Yat-Sen University, Guangzhou 510006, China; (G.L.); (L.Z.); (Q.W.); (S.C.); (L.L.)
- Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), Zhuhai 519000, China
- Pearl River Estuary Marine Ecosystem Research Station, Ministry of Education, Zhuhai 519082, China
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40
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(+)-/(−)-Angelignanine, a pair of neolignan enantiomers with an unprecedented carbon skeleton from an aqueous extract of the Angelica sinensis root head. CHINESE CHEM LETT 2021. [DOI: 10.1016/j.cclet.2020.11.067] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
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41
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Pearce KC, Fuentes RG, Calderon S, Marolikar R, Kingston DGI, Crawford TD. Structure Elucidation and Confirmation of Phloroglucinols from the Roots of Garcinia dauphinensis by Comparison of Experimental and Calculated ECD Spectra and Specific Rotations. JOURNAL OF NATURAL PRODUCTS 2021; 84:1163-1174. [PMID: 33823109 DOI: 10.1021/acs.jnatprod.0c01208] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Eight phloroglucinols from Garcinia dauphinensis were recently reported to have good to moderate antiplasmodial and anticancer activities, consistent with other phloroglucinol derivatives isolated from natural sources. Chiroptical properties were previously calculated and compared to experimental data for compound 2 as a means to deduce its absolute configuration. Tentative assignments for the remaining compounds were also reported based on these data. In order to arrive at stereochemical assignments for phloroglucinols 1 and 3-8, ECD spectra and specific rotations were computed for all stereoisomers of each compound. Molecular orbital analyses were also carried out for the most energetically favorable conformers of each compound. Absolute configurations are reported for all eight phloroglucinols for the first time.
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Affiliation(s)
- Kirk C Pearce
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Rolly G Fuentes
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
- Division of Natural Sciences and Mathematics, University of the Philippines Visayas Tacloban College, 6500 Tacloban City, Philippines
| | - Susana Calderon
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Rageshwari Marolikar
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - David G I Kingston
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - T Daniel Crawford
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, United States
- Molecular Sciences Software Institute, 1880 Pratt Drive, Suite 1100, Blacksburg, Virginia 24060, United States
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42
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Sharma VK, Srivedavyasasri R, Ali Z, Zjawiony JK, Ross SA, Ferreira D, Ashpole N, Khan IA. Rotenoids and Other Specialized Metabolites from the Roots of Mirabilis multiflora: Opioid and Cannabinoid Receptor Radioligand Binding Affinities. JOURNAL OF NATURAL PRODUCTS 2021; 84:1392-1396. [PMID: 33734684 DOI: 10.1021/acs.jnatprod.0c00939] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Mirabilis multiflora is an acclaimed hallucinogen consumed traditionally by the Hopi Indians to induce diagnostic visions. Its root extract afforded a new (3) and four known (2, 5, 6, and 7) 12a-hydroxyrotenoids, a known rotenoid (4), and two known secondary metabolites (1 and 8). The structures of the compounds were elucidated based on spectroscopic and spectrometric data analysis. Electronic circular dichroism data were used to define the (6aS,12aR) absolute configuration of the 12a-hydroxyrotenoids. Compounds 2-7 were screened for their radioligand binding affinities toward the opioid (δ, κ, and μ) and cannabinoid (CB1 and CB2) receptor subtypes. The 6-methoxy-substituted rotenoids 3, 4, and 7 showed the highest receptor binding affinity with moderate selectivity toward the δ-opioid receptor subtype, with negligible binding affinities for CB1 and CB2. Their binding affinities toward the δ-opioid receptor were 64.5% (4), 58.7% (7), and 55.3% (3) at 10 μM, respectively.
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Affiliation(s)
- Vimal K Sharma
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Radhakrishnan Srivedavyasasri
- National Center for Natural Product Research (NCNPR), The University of Mississippi, University, Mississippi 38677, United States
| | - Zulfiqar Ali
- National Center for Natural Product Research (NCNPR), The University of Mississippi, University, Mississippi 38677, United States
| | - Jordan K Zjawiony
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Samir A Ross
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
- National Center for Natural Product Research (NCNPR), The University of Mississippi, University, Mississippi 38677, United States
| | - Daneel Ferreira
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Nicole Ashpole
- Department of BioMolecular Sciences, Division of Pharmacology, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
| | - Ikhlas A Khan
- Department of BioMolecular Sciences, Division of Pharmacognosy, School of Pharmacy, The University of Mississippi, University, Mississippi 38677, United States
- National Center for Natural Product Research (NCNPR), The University of Mississippi, University, Mississippi 38677, United States
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Knowles SL, Roberts CD, Augustinović M, Flores-Bocanegra L, Raja HA, Heath-Borrero KN, Burdette JE, Falkinham Iii JO, Pearce CJ, Oberlies NH. Opportunities and Limitations for Assigning Relative Configurations of Antibacterial Bislactones using GIAO NMR Shift Calculations. JOURNAL OF NATURAL PRODUCTS 2021; 84:1254-1260. [PMID: 33764773 PMCID: PMC8108483 DOI: 10.1021/acs.jnatprod.0c01309] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Four new bislactones, dihydroacremonol (1), clonostachyone (2), acremodiol B (3), and acremodiol C (4), along with one known compound, hymeglusin (5), were isolated from cultures of two fungal strains (MSX59876 and MSX59260). Both strains were identified based on phylogenetic analysis of molecular data as Clonostachys spp.; yet, they biosynthesized a suite of related, but different, secondary metabolites. Given the challenges associated with elucidating the structures and configurations of bislactones, GIAO NMR calculations were tested as a complement to traditional NMR and HRESIMS experiments. Fortuitously, the enantiomer of the new natural product (4) was known as a synthetic compound, and the predicted configuration from GIAO NMR calculations (i.e., for the relative configuration) and optical rotation calculations (i.e., for the absolute configuration) matched those of the synthesis product. These results engendered confidence in using similar procedures, particularly the mixture of GIAO NMR shift calculations coupled with an orthogonal technique, to predict the configuration of 1-3; however, there were important limitations, which are discussed for each of these. The metabolites displayed antimicrobial activities, with compounds 1 and 4 being the most potent against Staphylococcus aureus with MICs of 1 and 4 μg/mL, respectively.
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Affiliation(s)
- Sonja L Knowles
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, United States
| | - Christopher D Roberts
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, United States
| | - Mario Augustinović
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, United States
| | - Laura Flores-Bocanegra
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, United States
| | - Huzefa A Raja
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, United States
| | - Kimberly N Heath-Borrero
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Joanna E Burdette
- Department of Pharmaceutical Sciences, University of Illinois at Chicago, Chicago, Illinois 60612, United States
| | - Joseph O Falkinham Iii
- Department of Biological Sciences, Virginia Tech Center for Drug Discovery, Virginia Tech, Blacksburg, Virginia 24061, United States
| | - Cedric J Pearce
- Mycosynthetix, Inc., Hillsborough, North Carolina 27278, United States
| | - Nicholas H Oberlies
- Department of Chemistry and Biochemistry, University of North Carolina at Greensboro, Greensboro, North Carolina 27412, United States
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Pan X, Dong F, Liu N, Xu J, Liu X, Wu X, Zheng Y. Development of RS-pyrisoxazole for reduction of pesticide inputs: A new insight from systemic evaluation of pyrisoxazole at the stereoisomeric level. JOURNAL OF HAZARDOUS MATERIALS 2021; 407:124359. [PMID: 33158653 DOI: 10.1016/j.jhazmat.2020.124359] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Revised: 10/01/2020] [Accepted: 10/20/2020] [Indexed: 06/11/2023]
Abstract
Pyrisoxazole is a chiral fungicide that is routinely applied to agricultural plant protection, but the potential environmental risk may be under- or over-estimated because the risk induced by stereoisomers have never been evaluated individually. Thus, we carried out a systemic evaluation of pyrisoxazole at the stereoisomeric level, including absolute configuration, stereoselective bioactivity, acute toxicity, and stereoselective dissipation behavior. There were 99.0-3545.3 fold difference in bioactivity toward six target pathogens (e.g., Alternaria solani) and 1.3-4.0 times difference in toxicity against aquatic organisms (Selenastrum capricornutum and Daphnia magna) between the best and worst stereoisomer. There appeared to be no significant stereoselective dissipation in all three kinds of soil under aerobic and anaerobic conditions. Stereoselective dissipation in buffer solution and river water only observed between diastereomers rather than between enantiomers. In addition, photolysis played a central role in the dissipation of pyrisoxazole in river water. RS-pyrisoxazole was 2.2- to 6.9-times more bioactive and 1.2- to 2.1-times more toxic than Rac-pyrisoxazole, and what is more, RS-pyrisoxazole degraded faster than other stereoisomers in river water. The result implicated that developing pure RS-pyrisoxazole as commercial product could reduce the input of inactive isomer on the basis of guaranteeing the efficacy against the target pathogens.
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Affiliation(s)
- Xinglu Pan
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Fengshou Dong
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
| | - Na Liu
- Institute of Animal Science, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Jun Xu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xingang Liu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Xiaohu Wu
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China
| | - Yongquan Zheng
- State Key Laboratory for Biology of Plant Disease and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, PR China.
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New Techniques of Structure Elucidation for Sesquiterpenes. PROGRESS IN THE CHEMISTRY OF ORGANIC NATURAL PRODUCTS 2021; 114:253-311. [PMID: 33792862 DOI: 10.1007/978-3-030-59444-2_3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
Abstract
The most significant new techniques that have been used in the twenty-first century for the structure elucidation of sesquiterpenes and some derivatives are reviewed in this chapter. A distinctive feature of these methodologies is the combination of accurate experimental measurements with theoretical data obtained by molecular modeling calculations that allow to visualize, understand, and quantify many structural characteristics. This has been the case for NMR spectroscopy, which has expanded its potential for solving complex structural problems by means of comparison with quantum mechanical molecular models. Ab initio and density functional theory calculations of chemical shifts, coupling constants, and residual chemical shift anisotropies have played important roles in the solution of many structures of sesquiterpenes. The assignments of their absolute configurations by evaluation of calculated and experimental chiroptical properties as electronic and vibrational circular dichroism are also reviewed. This chapter also includes the use of X-ray diffraction analysis with emphasis on calculations of the Flack and Hooft parameters, which are applicable to all molecules that crystallize in non-centrosymmetric space groups. The accurate molecular models of sesquiterpenes, validated by concordance with their experimental properties, are nowadays essential for the interpretation of the effects of these natural products on biological systems.
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Arreaga-González HM, Oliveros-Ortiz AJ, Del Río RE, Rodríguez-García G, Torres-Valencia JM, Cerda-García-Rojas CM, Joseph-Nathan P, Gómez-Hurtado MA. Methodology for the Absolute Configuration Determination of Epoxythymols Using the Constituents of Piptothrix areolare. JOURNAL OF NATURAL PRODUCTS 2021; 84:707-712. [PMID: 33683122 DOI: 10.1021/acs.jnatprod.0c01113] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Since epoxythymols occur in Nature either as scalemic mixtures or as pure enantiomers, the knowledge of their chiral composition and of the absolute configuration (AC) of the dominant enantiomer turns out to be mandatory. This task has already been faced using 1,1-bis-2-naphthol (BINOL), as a chiral solvating agent in accurate 1H NMR quantifications to determine the enantiomeric ratio, and vibrational circular dichroism (VCD) to evidence the AC of the dominant enantiomer. We now explore the use of electronic circular dichroism (ECD) to determine the AC of an epoxythymol for which time-expensive DFT calculations would be required unless the AC of a related molecule is already known, from either VCD studies or single-crystal X-ray diffraction analysis, since one could correlate the ECD Cotton effect with the AC because in ECD only chromophores and their neighborhoods are evidenced. This method is now applied by using the epoxythymols from Piptothrix areolare. Known areolal (1) and 10-cinnamoyloxy-8,9-epoxythymol isobutyrate (2) were isolated from the roots, while known 7-acetoxy-10-cinnamoyloxy-8,9-epoxythymol isobutyrate (3) and 10-cinnamoyloxy-7-hydroxy-8,9-epoxythymol isobutyrate (4), as well as the new enantiopure 7-acetoxy-10-cinnamoyloxy-6-hydroxy-8,9-epoxythymol isobutyrate (5) and 10-cinnamoyloxy-8,9-epoxy-6-hydroxy-7-northymol isobutyrate (6), were obtained from the extract of the flowers. Chemical correlation of epoxythymols 1 and 3 was achieved. Compounds 1-4 were obtained as scalemic mixtures, and 5 and 6 as the pure (8S) enantiomers. In addition, the new 10-cinnamoyloxy-7-oxo-8,9-dehydrothymol isobutyrate (7) was isolated from the roots. The structures of 5-7 followed from NMR and HRMS data, while enantiomeric compositions of 1-6 were determined by 1H NMR-BINOL measurements. The AC determination for 2-6 was done by ECD using a sample of 1 to reference the ECD Cotton effect. In turn, the AC of 1 was determined by VCD and extensive DFT calculations. The ECD-BINOL methodology turned out to be some 500 times more sensitive than that combining VCD and 1H NMR-BINOL.
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Affiliation(s)
- Héctor M Arreaga-González
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, Mexico City 07000, Mexico
| | - Antonio J Oliveros-Ortiz
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
| | - Rosa E Del Río
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
| | - Gabriela Rodríguez-García
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
| | - J Martín Torres-Valencia
- Área Académica de Química, Universidad Autónoma del Estado de Hidalgo, km 4.5 Carretera Pachuca-Tulancingo, Mineral de la Reforma, Hidalgo 42184, Mexico
| | - Carlos M Cerda-García-Rojas
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, Mexico City 07000, Mexico
| | - Pedro Joseph-Nathan
- Departamento de Química, Centro de Investigación y de Estudios Avanzados del Instituto Politécnico Nacional, Apartado 14-740, Mexico City 07000, Mexico
| | - Mario A Gómez-Hurtado
- Instituto de Investigaciones Químico Biológicas, Universidad Michoacana de San Nicolás de Hidalgo, Ciudad Universitaria, Morelia, Michoacán 58030, Mexico
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Synthesis and Structure-Chirality Relationship Analysis of Steroidal Quinoxalines to Design and Develop New Chiral Drugs. CHEMISTRY 2021. [DOI: 10.3390/chemistry3010030] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Of the utmost importance of chirality in organic compounds and drugs, the present work reports structure-chirality relationship of three steroidal quinoxalines, which were synthesised by condensing diaminobenzenes with cholestenone. All the compounds were purified and characterised by varying analytical tools prior to their chiroptical analysis by circular dichroism (CD) technique. The substituent groups on quinoxalines contributed to determining the chiroptical properties of the compounds. The positive Cotton effects have been observed in the CD spectra of unsubstituted and methyl-substituted quinoxalines, which indicated their P helicity. Importantly, chloro-substituent on quinoxalines produced different CD behaviour, which can be attributed to the presence of three lone pairs of electrons on Cl atom. The present work provides guidelines for determining the chiral properties of steroidal quinoxalines, which can be useful to design and develop potential molecules of biological importance.
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He XF, Chen JJ, Li TZ, Hu J, Zhang XM, Geng CA. Diarylheptanoid-chalcone hybrids with PTP1B and α-glucosidase dual inhibition from Alpinia katsumadai. Bioorg Chem 2021; 108:104683. [PMID: 33545534 DOI: 10.1016/j.bioorg.2021.104683] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 12/19/2022]
Abstract
The EtOH extracts of the dried seeds of Alpinia katsumadai were revealed with hypoglycemic effects on db/db mice at the concentration of 200 mg/kg. In order to clarify the antidiabetic constituents, 16 new diarylheptanoid-chalcone hybrids, katsumadainols A1-A16 (1-16), together with 13 known analogues (17-29), were isolated from A. katsumadai under the guidance of bioassay. Most of the compounds showed α-glucosidase and PTP1B dual inhibition, among which compounds 1-3, 5-7, 11-14, 21-25, and 27 showed PTP1B/TCPTP selective inhibition with IC50 values ranging from 22.0 to 96.7 μM, which were 2-10 times more active than sodium orthovanadate (IC50, 215.7 μM). All compounds exhibited obvious inhibition against α-glucosidase with IC50 values of 2.9-29.5 μM, indicating 6-59 times more active than acarbose (IC50, 170.9 μM). Study of enzyme kinetics indicated compounds 1, 3, and 12 were PTP1B and α-glucosidase mixed-type inhibitors with Ki values of 13.1, 12.9, 21.6 μM, and 4.9, 7.4, 3.4 μM, respectively.
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Affiliation(s)
- Xiao-Feng He
- 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, People's Republic of China
| | - Ji-Jun Chen
- 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, People's Republic of China; University of Chinese Academy of Sciences, Beijing 100049, People's Republic of China
| | - Tian-Ze 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, People's Republic of China
| | - Jing Hu
- 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, People's Republic of China
| | - Xue-Mei Zhang
- 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, People's Republic of China
| | - Chang-An Geng
- 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, People's Republic of China.
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Flores-Giubi ME, Botubol-Ares JM, Durán-Peña MJ, Escobar-Montaño F, Zorrilla D, Sánchez-Márquez J, Muñoz E, Macías-Sánchez AJ, Hernández-Galán R. Bond reactivity indices approach analysis of the [2+2] cycloaddition of jatrophane skeleton diterpenoids from Euphorbia gaditana Coss to tetracyclic gaditanone. PHYTOCHEMISTRY 2020; 180:112519. [PMID: 33038551 DOI: 10.1016/j.phytochem.2020.112519] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 09/07/2020] [Accepted: 09/08/2020] [Indexed: 06/11/2023]
Abstract
The reaction mechanism of the intramolecular [2 + 2] cycloaddition from a jatrophane precursor to the gaditanane skeleton, an unprecedented 5/6/4/6-fused tetracyclic ring framework recently isolated from Euphorbia spp., was studied using the bond reactivity indices approach. Furthermore, six diterpenoids, including three undescribed jatrophanes isolated from E. gaditana Coss, were described. The structures of these compounds were deduced by a combination of 2D NMR spectroscopy and ECD data analysis.
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Affiliation(s)
- M Eugenia Flores-Giubi
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain; Departamento de Química Biológica, Facultad de Ciencias Químicas, Universidad Nacional de Asunción, San Lorenzo, Departamento Central, Paraguay
| | - Jose Manuel Botubol-Ares
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - María J Durán-Peña
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Felipe Escobar-Montaño
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - David Zorrilla
- Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, Campus Universitario Puerto Real s/n, 11510, Puerto Real, Cádiz, Spain
| | - Jesús Sánchez-Márquez
- Departamento de Química Física, Facultad de Ciencias, Universidad de Cádiz, Campus Universitario Puerto Real s/n, 11510, Puerto Real, Cádiz, Spain
| | - Eduardo Muñoz
- Department of Cell Biology, Physiology and Immunology, Instituto Maimónides de Investigación Biomédicas de Córdoba (IMIBIC), Reina Sofía University Hospital, University of Córdoba, C/ Maria Virgen y Madre s/n, 14004, Córdoba, Spain
| | - Antonio J Macías-Sánchez
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain
| | - Rosario Hernández-Galán
- Departamento de Química Orgánica, Facultad de Ciencias, Campus Universitario Río San Pedro s/n, Universidad de Cádiz, 11510, Puerto Real, Cádiz, Spain.
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50
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Li JS, Du Y, Gu D, Cai W, Green A, Ng S, Leung A, Del Rio Flores A, Zhang W. Discovery and Biosynthesis of Clostyrylpyrones from the Obligate Anaerobe Clostridium roseum. Org Lett 2020; 22:8204-8209. [PMID: 33052676 DOI: 10.1021/acs.orglett.0c02656] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Anaerobic bacteria are a promising new source for natural product discovery. Examination of extracts from the obligate anaerobe Clostridium roseum led to the discovery of a new family of natural products, the clostyrylpyrones. The polyketide synthase-based biosynthetic mechanism of clostyrylpyrones is further proposed on the basis of bioinformatic, gene knockout, biochemical analysis, and heterologous expression studies.
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Affiliation(s)
- Jeffrey S Li
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Yongle Du
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Di Gu
- Department of Chemistry, University of California, Berkeley, California 94720, United States
| | - Wenlong Cai
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Allison Green
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Samuel Ng
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Alexander Leung
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Antonio Del Rio Flores
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States
| | - Wenjun Zhang
- Department of Chemical and Biomolecular Engineering, University of California, Berkeley, California 94720, United States.,Chan Zuckerberg Biohub, San Francisco, California 94158, United States
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