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Khumalo GP, Loa-Kum-Cheung W, Van Wyk BE, Feng Y, Cock IE. Leaf extracts of eight selected southern African medicinal plants modulate pro-inflammatory cytokine secretion in LPS-stimulated RAW 264.7 macrophages. Inflammopharmacology 2024; 32:1607-1620. [PMID: 38310564 PMCID: PMC11006729 DOI: 10.1007/s10787-023-01420-9] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 12/22/2023] [Indexed: 02/06/2024]
Abstract
This study investigates the anti-inflammatory properties of extracts prepared from the leaves of eight southern African medicinal plants used traditionally to treat inflammation and pain. The inhibitory effect of aqueous and ethanol extracts on the release of pro-inflammatory cytokines was determined in lipopolysaccharide (LPS) stimulated and unstimulated RAW 264.7 murine macrophage cells. The levels of interleukin (IL)-1β, IL-6, tumour necrosis factor-α (TNF-α), interferon-gamma (IFN-γ), monocyte chemoattractant protein 1 (MCP-1) and macrophage inflammatory protein (MIP)-2 release were determined using cytokine multiplex-bead assays. The ethanol extracts of Melianthus comosus Vahl (commonly known as honey flower), Tetradenia riparia (Hochst.) Codd (misty plume bush) and Warburgia salutaris (G. Bertol.) Chiov. (pepper-bark tree), demonstrated the most significant inhibitory activity, with over 50-fold inhibition of IL-1β, IL-6 and TNF-α levels in LPS-stimulated RAW 264.7 macrophages. The aqueous extract of M. comosus also significantly inhibited the secretion of all the tested cytokines and chemokines. Phytochemical investigation of M. comosus ethanol leaf extract using ultra-high-performance liquid chromatography coupled with high-resolution mass spectrometry (UHPLC-HRMS) led to the detection of crassolide, deoxylimonoic acid D-ring-lactone, 2-hydroxynonanoic acid and 5-noniloxytryptamine. To the best of our knowledge, the cytokine inhibition properties of most of the medicinal plants screened in this study are reported for the first time. Our results support the use of southern African medicinal plants as anti-inflammatory remedies and provide an insight into the immunomodulatory mechanisms of action.
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Affiliation(s)
- Gugulethu P Khumalo
- Centre for Planetary Health and Food Security, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, QLD, 4111, Australia
- School of Environment and Science, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, QLD, 4111, Australia
| | - Wendy Loa-Kum-Cheung
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Rd, Nathan, QLD, 4111, Australia
| | - Ben-Erik Van Wyk
- Department of Botany and Plant Biotechnology, University of Johannesburg, Auckland Park, P.O. Box 524, Johannesburg, 2006, South Africa
| | - Yunjiang Feng
- School of Environment and Science, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, QLD, 4111, Australia
- Griffith Institute for Drug Discovery, Griffith University, 46 Don Young Rd, Nathan, QLD, 4111, Australia
| | - Ian E Cock
- Centre for Planetary Health and Food Security, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, QLD, 4111, Australia.
- School of Environment and Science, Nathan Campus, Griffith University, 170 Kessels Rd, Nathan, QLD, 4111, Australia.
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2
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Microbiological Aspects of Unique, Rare, and Unusual Fatty Acids Derived from Natural Amides and Their Pharmacological Profile. MICROBIOLOGY RESEARCH 2022. [DOI: 10.3390/microbiolres13030030] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
In the proposed review, the pharmacological profile of unique, rare, and unusual fatty acids derived from natural amides is considered. These amides are produced by various microorganisms, lichens, and fungi. The biological activity of some natural fatty acid amides has been determined by their isolation from natural sources, but the biological activity of fatty acids has not been practically studied. According to QSAR data, the biological activity of fatty acids is shown, which demonstrated strong antifungal, antibacterial, antiviral, antineoplastic, anti-inflammatory activities. Moreover, some fatty acids have shown rare activities such as antidiabetic, anti-infective, anti-eczematic, antimutagenic, and anti-psoriatic activities. For some fatty acids that have pronounced biological properties, 3D graphs are shown that show a graphical representation of unique activities. These data are undoubtedly of both theoretical and practical interest for chemists, pharmacologists, as well as for the pharmaceutical industry, which is engaged in the synthesis of biologically active drugs.
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3
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Dethe DH, Kumar V, Beeralingappa NC, Mishra KB, Nirpal AK. Synthesis of Polyene Bioactive Natural Products: FR252921 and Vitamin A. Org Lett 2022; 24:2203-2207. [PMID: 35274951 DOI: 10.1021/acs.orglett.2c00546] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
A formal synthesis of FR252921, a potent macrocyclic immunosuppressive agent, and a six-step synthesis of vitamin A have been demonstrated. The application of a ruthenium-catalyzed step-economic and environmentally benign strategy for the highly stereo- and chemoselective construction of valuable polyene motifs of FR252921 and vitamin A highlights the syntheses. The key features for the synthesis FR252921 include preparation of the triene moiety followed by two consecutive peptide couplings of the three fragments.
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Affiliation(s)
- Dattatraya H Dethe
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Vimlesh Kumar
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | | | - Kunj B Mishra
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
| | - Appasaheb K Nirpal
- Department of Chemistry, Indian Institute of Technology Kanpur, Kanpur 208016, India
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4
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Levenfors JJ, Nord C, Bjerketorp J, Ståhlberg J, Larsson R, Guss B, Öberg B, Broberg A. Antibacterial pyrrolidinyl and piperidinyl substituted 2,4-diacetylphloroglucinols from Pseudomonas protegens UP46. J Antibiot (Tokyo) 2020; 73:739-747. [PMID: 32439988 DOI: 10.1038/s41429-020-0318-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 04/24/2020] [Accepted: 04/28/2020] [Indexed: 12/12/2022]
Abstract
In the search for new antibiotic compounds, fractionation of Pseudomonas protegens UP46 culture extracts afforded several known Pseudomonas compounds, including 2,4-diacetylphloroglucinol (DAPG), as well as two new antibacterial alkaloids, 6-(pyrrolidin-2-yl)DAPG (1) and 6-(piperidin-2-yl)DAPG (2). The structures of 1 and 2 were determined by nuclear magnetic resonance spectroscopy and mass spectrometry. Compounds 1 and 2 were found to have antibacterial activity against the Gram-positive bacteria Staphylococcus aureus and Bacillus cereus, with minimal inhibitory concentration (MIC) 2 and 4 μg ml-1, respectively, for 1, and 2 μg ml-1 for both pathogens for 2. The MICs for 1 and 2, against all tested Gram-negative bacteria, were >32 μg ml-1. The half maximal inhibitory concentrations against HepG2 cells for compounds 1 and 2 were 11 and 18 μg ml-1, respectively, which suggested 1 and 2 be too toxic for further evaluation as possible new antibacterial drugs. Stable isotope labelling experiments showed the pyrrolidinyl group of 1 to originate from ornithine and the piperidinyl group of 2 to originate from lysine. The P. protegens acetyl transferase (PpATase) is involved in the biosynthesis of monoacetylphloroglucinol and DAPG. No optical rotation was detected for 1 or 2, and a possible reason for this was investigated by studying if the PpATase may catalyse a stereo-non-specific introduction of the pyrrolidinyl/piperidinyl group in 1 and 2, but unless the PpATase can be subjected to major conformational changes, the enzyme cannot be involved in this reaction. The PpATase is, however, likely to catalyse the formation of 2,4,6-triacetylphloroglucinol from DAPG.
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Affiliation(s)
- Jolanta J Levenfors
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07, Uppsala, Sweden.,Ultupharma AB, Södra Rudbecksgatan 13, SE-752 36, Uppsala, Sweden
| | - Christina Nord
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07, Uppsala, Sweden
| | - Joakim Bjerketorp
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07, Uppsala, Sweden.,Ultupharma AB, Södra Rudbecksgatan 13, SE-752 36, Uppsala, Sweden
| | - Jerry Ståhlberg
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07, Uppsala, Sweden
| | - Rolf Larsson
- Department of Medical Sciences, Uppsala University, SE-751 85, Uppsala, Sweden
| | - Bengt Guss
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, P.O. Box 7036, SE-750 07, Uppsala, Sweden
| | - Bo Öberg
- Ultupharma AB, Södra Rudbecksgatan 13, SE-752 36, Uppsala, Sweden.,Department of Medicinal Chemistry, Uppsala University, P.O. Box 574, SE-751 23, Uppsala, Sweden
| | - Anders Broberg
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07, Uppsala, Sweden.
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5
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Yi W, Ge ZW, Wu B, Zhang Z. New metabolites from the marine-derived bacterium Pseudomonas sp. ZZ820R. Fitoterapia 2020; 143:104555. [PMID: 32194170 DOI: 10.1016/j.fitote.2020.104555] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2020] [Revised: 03/13/2020] [Accepted: 03/13/2020] [Indexed: 11/25/2022]
Abstract
Six previously undescribed compounds, named monaxanthones A and B, monaphenol A, monathioamide A, monaprenylindole A, and monavalerolactone A, were isolated from the culture of a marine-sourced bacterium Pseudomonas sp. ZZ820R in rice medium. Their structures were elucidated based on the HRESIMS data, NMR and MS-MS spectroscopic analyses, optical rotation and ECD calculations. Monathioamide A is an unprecedented sulfur-contained compound and monavalerolactone A represents the first example of this type of natural products. Monaprenylindole A showed antibacterial activity against methicillin-resistant Staphylococcus aureus.
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Affiliation(s)
- Wenwen Yi
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China
| | - Zhi-Wei Ge
- Analysis Center for Agrobiology and Environmental Sciences, Zhejiang University, Hangzhou 310058, PR China
| | - Bin Wu
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China.
| | - Zhizhen Zhang
- Ocean College, Zhoushan Campus, Zhejiang University, Zhoushan 316021, China.
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Shi Y, Zaleta-Pinet DA, Clark BR. Isolation, Identification, and Decomposition of Antibacterial Dialkylresorcinols from a Chinese Pseudomonas aurantiaca Strain. JOURNAL OF NATURAL PRODUCTS 2020; 83:194-201. [PMID: 31999458 DOI: 10.1021/acs.jnatprod.9b00315] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/10/2023]
Abstract
A chemical investigation of a Chinese Pseudomonas aurantiaca strain has yielded a new benzoquinone (4) and furanone (5), in addition to the known dialkylresorcinols 1 and 2. Extensive decomposition studies on the major metabolite 1 produced an additional furanone derivative (6), a hydroxyquinone (7), and two unusual resorcinol and hydroxyquinone dimers (8 and 9). Structures were elucidated by nuclear magnetic resonance spectroscopy in combination with tandem mass spectrometry analysis. These studies illustrate the potential of artifacts as a source of additional chemical diversity. Compounds 1 and 2 showed moderate antibacterial activity against a panel of Gram-positive pathogens, while the antibacterial activities of the artifacts (4-9) were reduced.
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Affiliation(s)
- Yue Shi
- School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , People's Republic of China
| | - Diana A Zaleta-Pinet
- School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , People's Republic of China
| | - Benjamin R Clark
- School of Pharmaceutical Science and Technology , Tianjin University , Tianjin 300072 , People's Republic of China
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Nord C, Levenfors JJ, Bjerketorp J, Sahlberg C, Guss B, Öberg B, Broberg A. Antibacterial Isoquinoline Alkaloids from the Fungus Penicillium Spathulatum Em19. Molecules 2019; 24:E4616. [PMID: 31861067 PMCID: PMC6943532 DOI: 10.3390/molecules24244616] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/12/2019] [Accepted: 12/13/2019] [Indexed: 01/21/2023] Open
Abstract
In the search for new microbial antibacterial secondary metabolites, two new compounds (1 and 2) were isolated from culture broths of Penicillium spathulatum Em19. Structure determination by nuclear magnetic resonance and mass spectrometry identified the compounds as 6,7-dihydroxy-5,10-dihydropyrrolo[1,2-b]isoquinoline-3-carboxylic acid (1, spathullin A) and 5,10-dihydropyrrolo[1,2-b]isoquinoline-6,7-diol (2, spathullin B). The two compounds displayed activity against both Gram-negative and -positive bacteria, including Escherichia coli, Acinetobacter baumannii, Enterobacter cloacae, Klebsiella pneumonia, Pseudomonas aeruginosa, and Staphylococcus aureus. Compound 2 was more potent than 1 against all tested pathogens, with minimal inhibitory concentrations down to 1 µg/mL (5 µM) against S. aureus, but 2 was also more cytotoxic than 1 (50% inhibitory concentrations 112 and 11 µM for compounds 1 and 2, respectively, towards Huh7 cells). Based on stable isotope labelling experiments and a literature comparison, the biosynthesis of 1 was suggested to proceed from cysteine, tyrosine and methionine via a non-ribosomal peptides synthase like enzyme complex, whereas compound 2 was formed spontaneously from 1 by decarboxylation. Compound 1 was also easily oxidized to the 1,2-benzoquinone 3. Due to the instability of compound 1 and the toxicity of 2, the compounds are of low interest as possible future antibacterial drugs.
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Affiliation(s)
- Christina Nord
- Department of Molecular Sciences, Uppsala BioCentrum, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (C.N.); (J.J.L.); (J.B.)
| | - Jolanta J. Levenfors
- Department of Molecular Sciences, Uppsala BioCentrum, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (C.N.); (J.J.L.); (J.B.)
- Ultupharma AB, Södra Rudbecksgatan 13, SE-752 36 Uppsala, Sweden;
| | - Joakim Bjerketorp
- Department of Molecular Sciences, Uppsala BioCentrum, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (C.N.); (J.J.L.); (J.B.)
- Ultupharma AB, Södra Rudbecksgatan 13, SE-752 36 Uppsala, Sweden;
| | | | - Bengt Guss
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences, P.O. Box 7036, SE-750 07 Uppsala, Sweden;
| | - Bo Öberg
- Ultupharma AB, Södra Rudbecksgatan 13, SE-752 36 Uppsala, Sweden;
- Department of Medicinal Chemistry, Uppsala University, P.O. Box 574, SE-751 23 Uppsala, Sweden
| | - Anders Broberg
- Department of Molecular Sciences, Uppsala BioCentrum, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden; (C.N.); (J.J.L.); (J.B.)
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8
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Chen Y, Coussanes G, Souris C, Aillard P, Kaldre D, Runggatscher K, Kubicek S, Di Mauro G, Maryasin B, Maulide N. A Domino 10-Step Total Synthesis of FR252921 and Its Analogues, Complex Macrocyclic Immunosuppressants. J Am Chem Soc 2019; 141:13772-13777. [PMID: 31436963 PMCID: PMC6837725 DOI: 10.1021/jacs.9b07185] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
![]()
FR252921, FR252922,
and FR256523 are a family of potent macrocyclic
polyene immunosuppressive agents with a novel mode of action. However,
the lack of an efficient and flexible synthesis has hindered further
biological studies, mostly due to the fact that the natural products
appear to be kinetic isomers regarding the triene moiety. Herein,
we report the development and application of an unprecedented, unique
domino Suzuki–Miyaura/4π-electrocyclic ring-opening macrocyclization,
resulting in a concise, unified, and stereoselective synthetic route
to these complex targets in only 10 steps. This in turn enables ready
access to a range of unnatural analogues, among which several compounds
showed inhibition of T-lymphocyte proliferation at levels equal or
superior to those of the natural products themselves.
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Affiliation(s)
- Yong Chen
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Guilhem Coussanes
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Caroline Souris
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Paul Aillard
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Dainis Kaldre
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Kathrin Runggatscher
- CeMM Research Center for Molecular Medicine , Austrian Academy of Sciences , Lazarettgasse 14, AKH BT 25.3 , 1090 Vienna , Austria
| | - Stefan Kubicek
- CeMM Research Center for Molecular Medicine , Austrian Academy of Sciences , Lazarettgasse 14, AKH BT 25.3 , 1090 Vienna , Austria
| | - Giovanni Di Mauro
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria
| | - Boris Maryasin
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria.,Institute of Theoretical Chemistry , University of Vienna , Währinger Strasse 17 , 1090 Vienna , Austria
| | - Nuno Maulide
- Institute of Organic Chemistry , University of Vienna , Währinger Strasse 38 , 1090 Vienna , Austria.,CeMM Research Center for Molecular Medicine , Austrian Academy of Sciences , Lazarettgasse 14, AKH BT 25.3 , 1090 Vienna , Austria
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9
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Bjerketorp J, Levenfors JJ, Sahlberg C, Nord CL, Andersson PF, Guss B, Öberg B, Broberg A. Antibacterial 3,6-Disubstituted 4-Hydroxy-5,6-dihydro-2H-pyran-2-ones from Serratia plymuthica MF371-2. JOURNAL OF NATURAL PRODUCTS 2017; 80:2997-3002. [PMID: 29083894 DOI: 10.1021/acs.jnatprod.7b00565] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
Bioassay-guided fractionation of culture extracts of Serratia plymuthica strain MF371-2 resulted in the isolation of two new antibacterial compounds with potent activity against Gram-positive bacteria, including Staphylococcus aureus LMG 15975 (MRSA). A spectroscopic investigation, in combination with synthesis, enabled the characterization of the compounds as 3-butyryl-4-hydroxy-6-heptyl-5,6-dihydro-2H-pyran-2-one (plymuthipyranone A, 1) and 3-butyryl-4-hydroxy-6-nonyl-5,6-dihydro-2H-pyran-2-one (plymuthipyranone B, 2). The MIC values for 1 and 2 against S. aureus LMG 15975 were determined to be 1-2 μg mL-1 and 0.8 μg mL-1, respectively. Compound 2 was found to have potent activity against many strains of S. aureus, including several mupirocin-resistant strains, other species of Staphylococcus, and vancomycin-resistant enterococci. Compound 2 was slightly cytotoxic for human cells, with CC50 values between 4.7 and 40 μg mL-1, but the CC50/MIC ratio was ≥10 for many tested combinations of human cells and bacteria, suggesting its possible use as an antibacterial agent. Several analogues were synthesized with different alkyl groups in the 3- and 6-positions (6-13), and their biological properties were evaluated. It was concluded that the activity of the compounds increased with the lengths of the alkyl and acyl substituents.
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Affiliation(s)
- Joakim Bjerketorp
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala, Sweden
| | - Jolanta J Levenfors
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala, Sweden
| | | | - Christina L Nord
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala, Sweden
| | - Pierre F Andersson
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala, Sweden
| | - Bengt Guss
- Department of Biomedical Sciences and Veterinary Public Health, Swedish University of Agricultural Sciences , P.O. Box 7036, SE-750 07 Uppsala, Sweden
| | - Bo Öberg
- Ultupharma AB , Södra Rudbecksgatan 13, SE-752 36 Uppsala, Sweden
- Department of Medicinal Chemistry, Uppsala University , P.O. Box 574, SE-751 23 Uppsala, Sweden
| | - Anders Broberg
- Department of Molecular Sciences, Uppsala BioCenter, Swedish University of Agricultural Sciences , P.O. Box 7015, SE-750 07 Uppsala, Sweden
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10
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Labradorins with Antibacterial Activity Produced by Pseudomonas sp. Molecules 2017; 22:molecules22071072. [PMID: 28654009 PMCID: PMC6151975 DOI: 10.3390/molecules22071072] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2017] [Revised: 06/11/2017] [Accepted: 06/21/2017] [Indexed: 11/16/2022] Open
Abstract
The urgent need for new antibacterial drugs has led to renewed interest in microorganisms, which historically have been the main source of previously discovered antibiotics. The present study describes the discovery of two new antibacterial oxazolylindole type alkaloids, labradorins 5 (1) and 6 (2), which were isolated and characterized from two isolates of Pseudomonas sp., along with four previously known tryptophane derived alkaloids. The structures of 1 and 2 were determined by NMR spectroscopy and MS, and confirmed by synthesis. During bioassay-guided isolation using several human bacterial pathogens, 1 and 2 displayed activity towards Staphylococcus aureus and Acinetobacter baumannii. The minimal inhibitory concentrations (MIC) of compounds 1 and 2 against S. aureus were 12 μg·mL-1 and 50 μg·mL-1, respectively, whereas the MICs against A. baumannii were >50 μg·mL-1. The CC50 values of compound 1 towards a liver cell line (HEP-G2) and a T-cell line (MT4) were 30 μg·mL-1 and 20 μg·mL-1, respectively, and for compound 2 were >100 μg·mL-1 and 20 μg·mL-1, respectively. Due to the limited potency of compounds 1 and 2, along with their toxicity, the compounds do not warrant further development towards new antibiotics.
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Ghosh AK, Rodriguez S. An enantioselective synthesis of the C3-C21 segment of the macrolide immunosuppressive agent FR252921. Tetrahedron Lett 2016; 57:2884-2887. [PMID: 27818534 DOI: 10.1016/j.tetlet.2016.05.067] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
An enantioselective synthesis of the C3-C21 segment of the novel immunosuppressant FR252921 is described. The C12 and C13 stereogenic centers were constructed by a non-aldol process utilizing optically active 4-phenylbutyrolactone. The C18 stereogenic center was installed using Braun's highly diastereoselective acetate aldol reaction. Other key steps involved Curtius rearrangement and Horner-Wadsworth-Emmons olefination reactions.
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Affiliation(s)
- Arun K Ghosh
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
| | - Samuel Rodriguez
- Department of Chemistry and Department of Medicinal Chemistry, Purdue University, 560 Oval Drive, West Lafayette, Indiana 47907, United States
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12
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Guo ZK, Wei W, Jiao RH, Yan T, Zang LY, Jiang R, Tan RX, Ge HM. Polyketides from the plant endophytic fungus Cladosporium sp. IFB3lp-2. JOURNAL OF ASIAN NATURAL PRODUCTS RESEARCH 2013; 15:928-933. [PMID: 23909809 DOI: 10.1080/10286020.2013.817389] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
Abstract
Chemical study of the ethyl acetate extract of the plant endophytic fungus Cladosporium sp. (strain no. IFB3lp-2) yielded three new polyketides (1-3), together with nine known compounds. All of the structures were elucidated on the basis of spectroscopic methods. The isolated compounds were screened for their cytotoxic, antiviral, and acetyl cholinesterase inhibitory activities. Regretfully, no compounds showed any significant activity in these assays.
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13
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Yadav JS, Sengupta S. The Formal Total Synthesis of FR252921 - An Immunosuppressant. European J Org Chem 2012. [DOI: 10.1002/ejoc.201201097] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Amans D, Bellosta V, Cossy J. Synthesis of two bioactive natural products: FR252921 and pseudotrienic acid B. Chemistry 2009; 15:3457-73. [PMID: 19219867 DOI: 10.1002/chem.200802649] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Concise and highly convergent syntheses of the immunosuppressive agent FR252921 and the related antimicrobial natural product pseudotrienic acid B were achieved from a common intermediate by using optically active titanium complexes to control the configuration of the stereogenic centers, a highly stereo- and regioselective cross-metathesis to generate the triene moieties, and a Stille cross-coupling to install the dienic units.
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Affiliation(s)
- Dominique Amans
- Laboratoire de Chimie Organique, ESPCI ParisTech, CNRS, 10 rue Vauquelin, 75231 Paris, France
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15
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Acetylcholinesterase-Inhibiting Activity of Pyrrole Derivatives from a Novel Marine Gliding Bacterium, Rapidithrix thailandica. Mar Drugs 2008. [DOI: 10.3390/md6040578] [Citation(s) in RCA: 71] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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Sangnoi Y, Sakulkeo O, Yuenyongsawad S, Kanjana-opas A, Ingkaninan K, Plubrukarn A, Suwanborirux K. Acetylcholinesterase-inhibiting activity of pyrrole derivatives from a novel marine gliding bacterium, Rapidithrix thailandica. Mar Drugs 2008; 6:578-86. [PMID: 19172195 PMCID: PMC2630848 DOI: 10.3390/md20080029] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2008] [Revised: 10/03/2008] [Accepted: 10/08/2008] [Indexed: 11/25/2022] Open
Abstract
Acetylcholinesterase-inhibiting activity of marinoquinoline A (1), a new pyrroloquinoline from a novel species of a marine gliding bacterium Rapidithrix thailandica, was assessed (IC50 4.9 μM). Two related pyrrole derivatives, 3-(2′-aminophenyl)-pyrrole (3) and 2,2-dimethyl-pyrrolo-1,2-dihydroquinoline (4), were also isolated from two other strains of R. thailandica. The isolation of 3 from a natural source is reported here for the first time. Compound 4 was proposed to be an isolation artifact derived from 3. The two isolated compounds were virtually inactive in the acetylcholinesterase-inhibitory assay (enzyme inhibition < 30% at 0.1 g L−1).
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Affiliation(s)
- Yutthapong Sangnoi
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, Songkla 90112, Thailand
| | - Oraphan Sakulkeo
- Marine Natural Products Research Unit, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Supreeya Yuenyongsawad
- Marine Natural Products Research Unit, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
| | - Akkharawit Kanjana-opas
- Department of Industrial Biotechnology, Faculty of Agro-Industry, Prince of Songkla University, Hat-Yai, Songkla 90112, Thailand
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
| | - Kornkanok Ingkaninan
- Department of Pharmaceutical Chemistry and Pharmacognosy, Faculty of Pharmaceutical Sciences, Naresuan University, Phitsanulok 65000, Thailand
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
| | - Anuchit Plubrukarn
- Marine Natural Products Research Unit, Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Prince of Songkla University, Hat-Yai, Songkhla 90112, Thailand
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
- Author to whom correspondence should be addressed; E-mail:
| | - Khanit Suwanborirux
- Center for Bioactive Natural Products from Marine Organisms and Endophytic Fungi (BNPME), Department of Pharmacognosy, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Patumwan, Bangkok 10330, Thailand
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Ju J, Seo JW, Her Y, Lim SK, Shen B. New lactimidomycin congeners shed insight into lactimidomycin biosynthesis in Streptomyces amphibiosporus. Org Lett 2007; 9:5183-6. [PMID: 17997563 DOI: 10.1021/ol702249g] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Lactimidomycin (LTM, 1) is a macrolide antitumor antibiotic with a glutarimide side chain from Streptomyces amphibiosporus ATCC53964. To further develop LTM and related analogues as drug candidates we have (i) improved LTM production by approximately 20 fold, (ii) identified three new metabolites (2-4) possibly involved in the LTM biosynthetic pathway; (iii) found 3 to be identical with a previously identified isomigrastatin precursor, (iv) determined the absolute stereochemistry of LTM, and (v) produced new LTM rearrangement products 2a-d and 4a-d.
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Affiliation(s)
- Jianhua Ju
- Division of Pharmaceutical Sciences, University of Wisconsin National Cooperative Drug Discovery Group, and Department of Chemistry, University of Wisconsin-Madison, Madison, Wisconsin 53705-2222, USA
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Falck JR, He A, Fukui H, Tsutsui H, Radha A. Synthesis and Stereochemical Assignment of FR252921, a Promising Immunosuppressant. Angew Chem Int Ed Engl 2007; 46:4527-9. [PMID: 17487911 DOI: 10.1002/anie.200700321] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- J Russell Falck
- Department of Biochemistry, University of Texas Southwestern Medical Center, 5323 Harry Hines Boulevard, Dallas, TX 75390-9038, USA.
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Falck J, He A, Fukui H, Tsutsui H, Radha A. Synthesis and Stereochemical Assignment of FR252921, a Promising Immunosuppressant. Angew Chem Int Ed Engl 2007. [DOI: 10.1002/ange.200700321] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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21
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Abstract
An analog of mycothiazole and pseudotrienic acid B were synthesized efficiently by using ring-closing metathesis or cross-metathesis as key reactions.
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Pohanka A, Menkis A, Levenfors J, Broberg A. Low-abundance kutznerides from Kutzneria sp. 744. JOURNAL OF NATURAL PRODUCTS 2006; 69:1776-81. [PMID: 17190458 DOI: 10.1021/np0604331] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/13/2023]
Abstract
Five new (5-9) and four known (1-4) kutznerides were isolated from the actinomycete Kutzneria sp. 744. Compounds 1-9 all consisted of a cyclohexadepsipeptide core with the general structure 2-(1-methylcyclopropyl)-D-glycine-(2S,3aR,8aS)-6,7-dichloro-3a-hydroxy-1,2,3,3a,8,8a-hexahydropyrrolo[2,3-b]indole-2-carboxylic acid-3-hydroxy-D-glutamic acid-O-methyl-L-serine-L-piperazic acid-(S)-2-hydroxy-3,3-dimethylbutyric acid. Compounds 5, 6, and 8 contained erythro-3-hydroxy-D-glutamic acid, whereas 7 and 9 contained the threo isomer and the hydroxy acid was present as (S)-2-hydroxy-3-methylbutyric acid in 5 and 7. The piperazic acid was C-5-N unsaturated and 4-hydroxylated in 6, 4-chlorinated in 8, and C-5-N unsaturated in 9. Minimal inhibitory concentrations for bacteria were found down to 6 microM (Staphylococcus aureus and Erwinia carotovora) and for fungi down to 70 microM (Fusarium culmorum). The trichlorinated 2 and 8 showed the highest antimicrobial activity, whereas 6, with a hydroxylated piperazic acid unit, did not show any inhibition of the pathogens at 230 microM.
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Affiliation(s)
- Anton Pohanka
- Department of Chemistry, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden.
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Yu S, Liu F, Ma D. A flexible route to immunosuppressive agent FR252921. Asymmetric total synthesis of its (13R,14R,19R)-isomer. Tetrahedron Lett 2006. [DOI: 10.1016/j.tetlet.2006.09.169] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Amans D, Bellosta V, Cossy J. Total Synthesis of Pseudotrienic Acid B: A Bioactive Metabolite fromPseudomonas sp. MF 381-IODS. Angew Chem Int Ed Engl 2006. [DOI: 10.1002/ange.200601114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Amans D, Bellosta V, Cossy J. Total Synthesis of Pseudotrienic Acid B: A Bioactive Metabolite fromPseudomonas sp. MF 381-IODS. Angew Chem Int Ed Engl 2006; 45:5870-4. [PMID: 16881023 DOI: 10.1002/anie.200601114] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Dominique Amans
- Laboratoire de Chimie Organique associé au CNRS, ESPCI, 10 rue Vauquelin, 75231 Paris Cedex 05, France
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Pohanka A, Levenfors J, Broberg A. Antimicrobial dialkylresorcinols from Pseudomonas sp. Ki19. JOURNAL OF NATURAL PRODUCTS 2006; 69:654-7. [PMID: 16643045 DOI: 10.1021/np0600595] [Citation(s) in RCA: 17] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/08/2023]
Abstract
Four dialkylresorcinols (1-4) were isolated from a liquid culture of Pseudomonas sp. Ki19. Compounds 1 and 2, 2-butyl-5-propylresorcinol and 2-hexyl-5-methylresorcinol, respectively, have not previously been isolated from biological sources, whereas 3 and 4, 2-hexyl-5-propylresorcinol (DB-2073) and 2-hexyl-5-pentylresorcinol (resorstatin), both have been found in biological systems. The compounds inhibited Staphyllococcus aureus at concentrations < or = 10 microg/mL as well as the fungi Aspergillus fumigatus and Fusarium culmorum at 50 microg/mL. The formation of possible antimicrobial quinone oxidation products was investigated under bioassay conditions, and they were not found to be responsible for the main antimicrobial activity.
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Affiliation(s)
- Anton Pohanka
- Department of Chemistry, Swedish University of Agricultural Sciences, P.O. Box 7015, SE-750 07 Uppsala, Sweden
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