1
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Chen X, Ding X, Fang J, Mao C, Gong X, Zhang Y, Zhang N, Yan F, Lou Y, Chen Z, Ding W, Ma Z. Natural Derivatives of Selective HDAC8 Inhibitors with Potent in Vivo Antitumor Efficacy against Breast Cancer. J Med Chem 2024; 67:14609-14632. [PMID: 39110628 DOI: 10.1021/acs.jmedchem.4c01438] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2024]
Abstract
HDAC8 is a therapeutic target with great promise for breast cancer. Here, we reported a novel compound corallorazine D from Nocardiopsis sp. XZB108, selectively inhibited HDAC8 (IC50 = 0.90 ± 0.014 μM), suggesting that it may be a promising nonhydroxamate HDAC8 inhibitor. Upon additional modifications of corallorazine D, a candidate compound 5k, demonstrated remarkable inhibitory potency against HDAC8 (IC50 = 0.12 ± 0.01 nM), 89-fold superior to PCI-34051. The selectivity of 5k was at least 439-fold, superior to corallorazine D, confirming the efficacy of our modifications. In an orthotopic mouse model of breast cancer, 5k displayed nearly 4-fold superior antitumor activity than SAHA. Furthermore, 5k triggered antitumor immunity by activating T cells. Treatment with 5k significantly increased the proportion of M1 macrophages and decreased the proportion of M2 macrophages (M1/M2 ratio = 2.67 ± 0.25). 5k represents a promising compound for further investigation as a potential treatment for breast cancer.
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Affiliation(s)
- Xiaoming Chen
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Xia Ding
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Jiebin Fang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Churu Mao
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Xingzhi Gong
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Yuxiao Zhang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Ningjing Zhang
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Feihang Yan
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
| | - Yijie Lou
- Key Laboratory of Digestive Pathophysiology of Zhejiang Province, the First Affiliated Hospital of Zhejiang Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Zhe Chen
- Key Laboratory of Digestive Pathophysiology of Zhejiang Province, the First Affiliated Hospital of Zhejiang Chinese Medicine, Zhejiang Chinese Medical University, Hangzhou 310053, China
| | - Wanjing Ding
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
- Hainan Institute of Zhejiang University, Sanya 572025, China
| | - Zhongjun Ma
- Institute of Marine Biology and Pharmacology, Ocean College, Zhejiang University, Zhoushan 316021, China
- Hainan Institute of Zhejiang University, Sanya 572025, China
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2
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Dreckmann TM, Fritz L, Kaiser CF, Bouhired SM, Wirtz DA, Rausch M, Müller A, Schneider T, König GM, Crüsemann M. Biosynthesis of the corallorazines, a widespread class of antibiotic cyclic lipodipeptides. RSC Chem Biol 2024:d4cb00157e. [PMID: 39184525 PMCID: PMC11342130 DOI: 10.1039/d4cb00157e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2024] [Accepted: 08/15/2024] [Indexed: 08/27/2024] Open
Abstract
Corallorazines are cyclic lipodipeptide natural products produced by the myxobacterium Corallococcus coralloides B035. To decipher the basis of corallorazine biosynthesis, the corallorazine nonribosomal peptide synthetase (NRPS) biosynthetic gene cluster crz was identified and analyzed in detail. Here, we present a model of corallorazine biosynthesis, supported by bioinformatic analyses and in vitro investigations on the bimodular NRPS synthesizing the corallorazine core. Corallorazine biosynthesis shows several distinct features, such as the presence of a dehydrating condensation domain, and a unique split adenylation domain on two open reading frames. Using an alternative fatty acyl starter unit, the first steps of corallorazine biosynthesis were characterized in vitro, supporting our biosynthetic model. The dehydrating condensation domain was bioinformatically analyzed in detail and compared to other modifying C domains, revealing unreported specific sequence motives for this domain subfamily. Using global bioinformatics analyses, we show that the crz gene cluster family is widespread among bacteria and encodes notable chemical diversity. Corallorazine A displays moderate antimicrobial activity against selected Gram-positive and Gram-negative bacteria. Mode of action studies comprising whole cell analysis and in vitro test systems revealed that corallorazine A inhibits bacterial transcription by targeting the DNA-dependent RNA polymerase.
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Affiliation(s)
- Teresa M Dreckmann
- Institute of Pharmaceutical Biology, University of Bonn Nussallee 6 53115 Bonn Germany
| | - Lisa Fritz
- Institute for Pharmaceutical Microbiology, University Hospital Bonn, University of Bonn Meckenheimer Allee 168 53115 Bonn Germany
| | - Christian F Kaiser
- Institute of Pharmaceutical Biology, University of Bonn Nussallee 6 53115 Bonn Germany
| | - Sarah M Bouhired
- Institute of Pharmaceutical Biology, University of Bonn Nussallee 6 53115 Bonn Germany
| | - Daniel A Wirtz
- Institute of Pharmaceutical Biology, University of Bonn Nussallee 6 53115 Bonn Germany
| | - Marvin Rausch
- Institute for Pharmaceutical Microbiology, University Hospital Bonn, University of Bonn Meckenheimer Allee 168 53115 Bonn Germany
| | - Anna Müller
- Institute for Pharmaceutical Microbiology, University Hospital Bonn, University of Bonn Meckenheimer Allee 168 53115 Bonn Germany
| | - Tanja Schneider
- Institute for Pharmaceutical Microbiology, University Hospital Bonn, University of Bonn Meckenheimer Allee 168 53115 Bonn Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne Bonn Germany
| | - Gabriele M König
- Institute of Pharmaceutical Biology, University of Bonn Nussallee 6 53115 Bonn Germany
| | - Max Crüsemann
- Institute of Pharmaceutical Biology, University of Bonn Nussallee 6 53115 Bonn Germany
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3
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Arakal BS, Rowlands RS, McCarthy M, Whitworth DE, Maddocks SE, James PE, Livingstone PG. Corallococcus senghenyddensis sp. nov., a myxobacterium with potent antimicrobial activity. J Appl Microbiol 2024; 135:lxae102. [PMID: 38649930 DOI: 10.1093/jambio/lxae102] [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: 03/11/2024] [Revised: 04/10/2024] [Accepted: 04/19/2024] [Indexed: 04/25/2024]
Abstract
AIM Corallococcus species are diverse in the natural environment with 10 new Corallococcus species having been characterized in just the last 5 years. As well as being an abundant myxobacterial genus, they produce several secondary metabolites, including Corallopyronin, Corramycin, Coralmycin, and Corallorazine. We isolated a novel strain Corallococcus spp RDP092CA from soil in South Wales, UK, using Candida albicans as prey bait and characterized its predatory activities against pathogenic bacteria and yeast. METHODS AND RESULTS The size of the RDP092CA genome was 8.5 Mb with a G + C content of 71.4%. Phylogenetically, RDP092CA is closely related to Corallococcus interemptor, C. coralloides, and C. exiguus. However, genome average nucleotide identity and digital DNA-DNA hybridization values are lower than 95% and 70% when compared to those type strains, implying that it belongs to a novel species. The RDP092CA genome harbours seven types of biosynthetic gene clusters (BGCs) and 152 predicted antimicrobial peptides. In predation assays, RDP092CA showed good predatory activity against Escherichia coli, Pseudomonas aeruginosa, Citrobacter freundii, and Staphylococcus aureus but not against Enterococcus faecalis. It also showed good antibiofilm activity against all five bacteria in biofilm assays. Antifungal activity against eight Candida spp. was variable, with particularly good activity against Meyerozyma guillermondii DSM 6381. Antimicrobial peptide RDP092CA_120 exhibited potent antibiofilm activity with >50% inhibition and >60% dispersion of biofilms at concentrations down to 1 μg/ml. CONCLUSIONS We propose that strain RDP092CA represents a novel species with promising antimicrobial activities, Corallococcus senghenyddensis sp. nov. (=NBRC 116490T =CCOS 2109T), based on morphological, biochemical, and genomic features.
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Affiliation(s)
- Benita S Arakal
- School of Sports and Health Sciences, Department of Biomedical Sciences, Cardiff Metropolitan University, Llandaff Campus, Cardiff CF5 2YB, United Kingdom
| | - Richard S Rowlands
- School of Sports and Health Sciences, Department of Biomedical Sciences, Cardiff Metropolitan University, Llandaff Campus, Cardiff CF5 2YB, United Kingdom
| | - Michael McCarthy
- School of Sports and Health Sciences, Department of Biomedical Sciences, Cardiff Metropolitan University, Llandaff Campus, Cardiff CF5 2YB, United Kingdom
| | - David E Whitworth
- Department of Life Sciences, Aberystwyth University, Aberystwyth SY23 3FL, United Kingdom
| | - Sarah E Maddocks
- School of Sports and Health Sciences, Department of Biomedical Sciences, Cardiff Metropolitan University, Llandaff Campus, Cardiff CF5 2YB, United Kingdom
| | - Philip E James
- School of Sports and Health Sciences, Department of Biomedical Sciences, Cardiff Metropolitan University, Llandaff Campus, Cardiff CF5 2YB, United Kingdom
| | - Paul G Livingstone
- School of Sports and Health Sciences, Department of Biomedical Sciences, Cardiff Metropolitan University, Llandaff Campus, Cardiff CF5 2YB, United Kingdom
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4
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Lindig A, Schwarz J, Hubmann G, Rosenthal K, Lütz S. Bivariate One Strain Many Compounds Designs Expand the Secondary Metabolite Production Space in Corallococcus coralloides. Microorganisms 2023; 11:2592. [PMID: 37894250 PMCID: PMC10609524 DOI: 10.3390/microorganisms11102592] [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: 09/21/2023] [Revised: 10/13/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
The scarcely investigated myxobacterium Corallococcus coralloides holds a large genome containing many uncharacterized biosynthetic gene clusters (BGCs) that potentially encode the synthesis of entirely new natural products. Despite its promising genomic potential, suitable cultivation conditions have not yet been found to activate the synthesis of new secondary metabolites (SMs). Finding the right cultivation conditions to activate BGCs in the genome remains a major bottleneck, and its full biosynthetic potential has so far not been determined. We therefore applied a bivariate "one strain many compounds" (OSMAC) approach, using a combination of two elicitor changes at once, for the activation of BGCs and concomitant SM production by C. coralloides. The screening was carried out in Duetz-System 24-well plates, applying univariate and bivariate OSMAC conditions. We combined biotic additives and organic solvents with a complex growth medium for univariate conditions and with minimal medium for bivariate conditions. The success in the activation of BGCs was evaluated by determining the number of new mass features detected in the respective extracts. We found synergistic effects in the bivariate OSMAC designs, evidenced by the detection of completely new mass features in the bivariate OSMAC experiments, which were not detected in the univariate OSMAC designs with only one elicitor. Overall, the bivariate OSMAC screening led to 55 new mass features, which were not detected in the univariate OSMAC design. Molecular networks revealed that these new mass features embody potential novel natural compounds and chemical derivatives like the N-acyl fatty amine N-pentyloctadecanamide and possibly sulfur-containing natural products. Hence, the presence of multiple elicitors in the bivariate OSMAC designs successfully activated the biosynthetic potential in C. coralloides. We propose bivariate OSMAC designs with a complex combination of elicitors as a straightforward strategy to robustly expand the SM space of microorganisms with large genomes.
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Affiliation(s)
- Anton Lindig
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Jenny Schwarz
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Georg Hubmann
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
| | - Katrin Rosenthal
- School of Science, Constructor University, 28759 Bremen, Germany;
| | - Stephan Lütz
- Department of Biochemical and Chemical Engineering, TU Dortmund University, Emil-Figge-Straße 66, 44227 Dortmund, Germany
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5
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Becker T, Krome AK, Vahdati S, Schiefer A, Pfarr K, Ehrens A, Aden T, Grosse M, Jansen R, Alt S, Hesterkamp T, Stadler M, Hübner MP, Kehraus S, König GM, Hoerauf A, Wagner KG. In Vitro-In Vivo Relationship in Mini-Scale-Enabling Formulations of Corallopyronin A. Pharmaceutics 2022; 14:1657. [PMID: 36015283 PMCID: PMC9414514 DOI: 10.3390/pharmaceutics14081657] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/04/2022] [Accepted: 08/08/2022] [Indexed: 11/16/2022] Open
Abstract
In vivo studies in mice provide a valuable model to test novel active pharmaceutical ingredients due to their low material need and the fact that mice are frequently used as a species for early efficacy models. However, preclinical in vitro evaluations of formulation principles in mice are still lacking. The development of novel in vitro and in silico models supported the preclinical formulation evaluation for the anti-infective corallopyronin A (CorA). To this end, CorA and solubility-enhanced amorphous solid dispersion formulations, comprising povidone or copovidone, were evaluated regarding biorelevant solubilities and dissolution in mouse-specific media. As an acidic compound, CorA and CorA-ASD formulations showed decreased solubilities in mice when compared with human-specific media. In biorelevant biphasic dissolution experiments CorA-povidone showed a three-fold higher fraction partitioned into the organic phase of the biphasic dissolution, when compared with CorA-copovidone. Bioavailabilities determined by pharmacokinetic studies in BALB/c mice correlated with the biphasic dissolution prediction and resulted in a Level C in vitro-in vivo correlation. In vitro cell experiments excluded intestinal efflux by P-glycoprotein or breast cancer resistance protein. By incorporating in vitro results into a physiologically based pharmacokinetic model, the plasma concentrations of CorA-ASD formulations were predicted and identified dissolution as the limiting factor for bioavailability.
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Affiliation(s)
- Tim Becker
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
| | - Anna K. Krome
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Sahel Vahdati
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
| | - Andrea Schiefer
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Kenneth Pfarr
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Alexandra Ehrens
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Tilman Aden
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Miriam Grosse
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Rolf Jansen
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Silke Alt
- Translational Project Management Office (TPMO), German Center for Infection Research (DZIF), Inhoffenstr. 7, 38124 Braunschweig, Germany
| | - Thomas Hesterkamp
- Translational Project Management Office (TPMO), German Center for Infection Research (DZIF), Inhoffenstr. 7, 38124 Braunschweig, Germany
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Inhoffenstr. 7, 38124 Braunschweig, Germany
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Marc P. Hübner
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Stefan Kehraus
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Pharmaceutical Biology, University of Bonn, Nußallee 6, 53115 Bonn, Germany
| | - Gabriele M. König
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Pharmaceutical Biology, University of Bonn, Nußallee 6, 53115 Bonn, Germany
| | - Achim Hoerauf
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Venusberg–Campus 1, 53127 Bonn, Germany
| | - Karl G. Wagner
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Gerhard-Domagk-Str. 3, 53121 Bonn, Germany
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany
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6
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Krome AK, Becker T, Kehraus S, Schiefer A, Gütschow M, Chaverra-Muñoz L, Hüttel S, Jansen R, Stadler M, Ehrens A, Pogorevc D, Müller R, Hübner MP, Hesterkamp T, Pfarr K, Hoerauf A, Wagner KG, König GM. Corallopyronin A: antimicrobial discovery to preclinical development. Nat Prod Rep 2022; 39:1705-1720. [PMID: 35730490 DOI: 10.1039/d2np00012a] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
Covering: August 1984 up to January 2022Worldwide, increasing morbidity and mortality due to antibiotic-resistant microbial infections has been observed. Therefore, better prevention and control of infectious diseases, as well as appropriate use of approved antibacterial drugs are crucial. There is also an urgent need for the continuous development and supply of novel antibiotics. Thus, identifying new antibiotics and their further development is once again a priority of natural product research. The antibiotic corallopyronin A was discovered in the 1980s in the culture broth of the Myxobacterium Corallococcus coralloides and serves, in the context of this review, as a show case for the development of a naturally occurring antibiotic compound. The review demonstrates how a hard to obtain, barely water soluble and unstable compound such as corallopyronin A can be developed making use of sophisticated production and formulation approaches. Corallopyronin A is a bacterial DNA-dependent RNA polymerase inhibitor with a new target site and one of the few representatives of this class currently in preclinical development. Efficacy against Gram-positive and Gram-negative pathogens, e.g., Chlamydia trachomatis, Orientia tsutsugamushi, Staphylococcus aureus, and Wolbachia has been demonstrated. Due to its highly effective in vivo depletion of Wolbachia, which are essential endobacteria of most filarial nematode species, and its robust macrofilaricidal efficacy, corallopyronin A was selected as a preclinical candidate for the treatment of human filarial infections. This review highlights the discovery and production optimization approaches for corallopyronin A, as well as, recent preclinical efficacy results demonstrating a robust macrofilaricidal effect of the anti-Wolbachia candidate, and the solid formulation strategy which enhances the stability as well as the bioavailability of corallopyronin A.
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Affiliation(s)
- Anna K Krome
- Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Germany. .,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Germany
| | - Tim Becker
- Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Germany. .,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany
| | - Stefan Kehraus
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Pharmaceutical Biology, University of Bonn, Germany.
| | - Andrea Schiefer
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Germany
| | - Michael Gütschow
- Pharmaceutical & Medicinal Chemistry, University of Bonn, Germany
| | | | - Stephan Hüttel
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Rolf Jansen
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, Braunschweig, Germany.,German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany
| | - Alexandra Ehrens
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Germany
| | - Domen Pogorevc
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany.,Helmholtz Institute for Pharmaceutical Research Saarland, Saarbrucken, Germany
| | - Rolf Müller
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany.,Helmholtz Institute for Pharmaceutical Research Saarland, Saarbrucken, Germany
| | - Marc P Hübner
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Germany
| | - Thomas Hesterkamp
- Translational Project Management Office (TPMO), German Center for Infection Research (DZIF), Braunschweig, Germany
| | - Kenneth Pfarr
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Germany
| | - Achim Hoerauf
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, Germany
| | - Karl G Wagner
- Pharmaceutical Technology and Biopharmaceutics, University of Bonn, Germany. .,German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany
| | - Gabriele M König
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, Germany.,Institute for Pharmaceutical Biology, University of Bonn, Germany.
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7
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Babadi ZK, Garcia R, Ebrahimipour GH, Risdian C, Kämpfer P, Jarek M, Müller R, Wink J. Corallococcus soli sp. Nov., a Soil Myxobacterium Isolated from Subtropical Climate, Chalus County, Iran, and Its Potential to Produce Secondary Metabolites. Microorganisms 2022; 10:microorganisms10071262. [PMID: 35888982 PMCID: PMC9323933 DOI: 10.3390/microorganisms10071262] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2022] [Revised: 05/24/2022] [Accepted: 06/15/2022] [Indexed: 11/16/2022] Open
Abstract
A novel myxobacterial strain ZKHCc1 1396T was isolated in 2017 from a soil sample collected along Chalus Road connecting Tehran and Mazandaran, Iran. It was a Gram-negative, rod-shaped bacterial strain that displayed the general features of Corallococcus, including gliding and fruiting body formation on agar and microbial lytic activity. Strain ZKHCc1 1396T was characterized as an aerobic, mesophilic, and chemoheterotrophic bacterium resistant to many antibiotics. The major cellular fatty acids were branched-chain iso-C17:0 2-OH, iso-C15:0, iso-C17:1, and iso-C17:0. The strain showed the highest 16S rRNA gene sequence similarity to Corallococcusterminator CA054AT (99.67%) and C. praedator CA031BT (99.17%), and formed a novel branch both in the 16S rRNA gene sequence and phylogenomic tree. The genome size was 9,437,609 bp, with a DNA G + C content of 69.8 mol%. The strain had an average nucleotide identity (ANI) value lower than the species cut-off (95%), and with the digital DNA–DNA hybridization (dDDH) below the 70% threshold compared to the closest type strains. Secondary metabolite and biosynthetic gene cluster analyses revealed the strain’s potential to produce novel compounds. Based on polyphasic taxonomic characterization, we propose that strain ZKHCc1 1396T represents a novel species, Corallococcus soli sp. nov. (NCCB 100659T = CIP 111634T).
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Affiliation(s)
- Zahra Khosravi Babadi
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University GC, Tehran 1983969411, Iran;
- Microbial Strain Collection, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany;
- Correspondence: (Z.K.B.); (J.W.); Tel.: +98-021-29905901 (Z.K.B.); +49-531-61814223 (J.W.); Fax: +98-021-22431664 (Z.K.B.); +49-531-61819499 (J.W.)
| | - Ronald Garcia
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany; (R.G.); (R.M.)
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Gholam Hossein Ebrahimipour
- Department of Microbiology and Microbial Biotechnology, Faculty of Life Sciences and Biotechnology, Shahid Beheshti University GC, Tehran 1983969411, Iran;
| | - Chandra Risdian
- Microbial Strain Collection, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany;
- Research Unit for Clean Technology, National Research and Innovation Agency (BRIN), Bandung 40135, Indonesia
| | - Peter Kämpfer
- Department of Applied Microbiology, Justus Liebig University Gießen, 35392 Gießen, Germany;
| | - Michael Jarek
- Genome Analytics, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany;
| | - Rolf Müller
- Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI), Saarland University, Campus E8 1, 66123 Saarbrücken, Germany; (R.G.); (R.M.)
- German Centre for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Joachim Wink
- Microbial Strain Collection, Helmholtz Centre for Infection Research (HZI), Inhoffenstraße 7, 38124 Braunschweig, Germany;
- Correspondence: (Z.K.B.); (J.W.); Tel.: +98-021-29905901 (Z.K.B.); +49-531-61814223 (J.W.); Fax: +98-021-22431664 (Z.K.B.); +49-531-61819499 (J.W.)
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8
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Bhat MA, Mishra AK, Bhat MA, Banday MI, Bashir O, Rather IA, Rahman S, Shah AA, Jan AT. Myxobacteria as a Source of New Bioactive Compounds: A Perspective Study. Pharmaceutics 2021; 13:1265. [PMID: 34452226 PMCID: PMC8401837 DOI: 10.3390/pharmaceutics13081265] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2021] [Revised: 08/06/2021] [Accepted: 08/09/2021] [Indexed: 12/18/2022] Open
Abstract
Myxobacteria are unicellular, Gram-negative, soil-dwelling, gliding bacteria that belong to class δ-proteobacteria and order Myxococcales. They grow and proliferate by transverse fission under normal conditions, but form fruiting bodies which contain myxospores during unfavorable conditions. In view of the escalating problem of antibiotic resistance among disease-causing pathogens, it becomes mandatory to search for new antibiotics effective against such pathogens from natural sources. Among the different approaches, Myxobacteria, having a rich armor of secondary metabolites, preferably derivatives of polyketide synthases (PKSs) along with non-ribosomal peptide synthases (NRPSs) and their hybrids, are currently being explored as producers of new antibiotics. The Myxobacterial species are functionally characterized to assess their ability to produce antibacterial, antifungal, anticancer, antimalarial, immunosuppressive, cytotoxic and antioxidative bioactive compounds. In our study, we have found their compounds to be effective against a wide range of pathogens associated with the concurrence of different infectious diseases.
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Affiliation(s)
- Mudasir Ahmad Bhat
- Department of Biotechnology, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | | | - Mujtaba Aamir Bhat
- Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | - Mohammad Iqbal Banday
- Department of Microbiology, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | - Ommer Bashir
- Department of School Education, Jammu 181205, Jammu and Kashmir, India;
| | - Irfan A. Rather
- Department of Biological Sciences, Faculty of Science, King Abdulaziz University (KAU), Jeddah 21589, Saudi Arabia;
| | - Safikur Rahman
- Department of Botany, MS College, BR Ambedkar Bihar University, Muzaffarpur 845401, Bihar, India;
| | - Ali Asghar Shah
- Department of Biotechnology, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
| | - Arif Tasleem Jan
- Department of Botany, Baba Ghulam Shah Badshah University, Rajouri 185234, Jammu and Kashmir, India;
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9
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Krome AK, Becker T, Kehraus S, Schiefer A, Steinebach C, Aden T, Frohberger SJ, López Mármol Á, Kapote D, Jansen R, Chaverra-Muñoz L, Hübner MP, Pfarr K, Hesterkamp T, Stadler M, Gütschow M, König GM, Hoerauf A, Wagner KG. Solubility and Stability Enhanced Oral Formulations for the Anti-Infective Corallopyronin A. Pharmaceutics 2020; 12:E1105. [PMID: 33217948 PMCID: PMC7698778 DOI: 10.3390/pharmaceutics12111105] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2020] [Revised: 11/13/2020] [Accepted: 11/16/2020] [Indexed: 02/03/2023] Open
Abstract
Novel-antibiotics are urgently needed to combat an increase in morbidity and mortality due to resistant bacteria. The preclinical candidate corallopyronin A (CorA) is a potent antibiotic against Gram-positive and some Gram-negative pathogens for which a solid oral formulation was needed for further preclinical testing of the active pharmaceutical ingredient (API). The neat API CorA is poorly water-soluble and instable at room temperature, both crucial characteristics to be addressed and overcome for use as an oral antibiotic. Therefore, amorphous solid dispersion (ASD) was chosen as formulation principle. The formulations were prepared by spray-drying, comprising the water-soluble polymers povidone and copovidone. Stability (high-performance liquid chromatography, Fourier-transform-infrared spectroscopy, differential scanning calorimetry), dissolution (biphasic dissolution), and solubility (biphasic dissolution, Pion's T3 apparatus) properties were analyzed. Pharmacokinetic evaluations after intravenous and oral administration were conducted in BALB/c mice. The results demonstrated that the ASD formulation principle is a suitable stability- and solubility-enhancing oral formulation strategy for the API CorA to be used in preclinical and clinical trials and as a potential market product.
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Affiliation(s)
- Anna K. Krome
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121 Bonn, Germany; (A.K.K.); (T.B.); (Á.L.M.); (D.K.)
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
| | - Tim Becker
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121 Bonn, Germany; (A.K.K.); (T.B.); (Á.L.M.); (D.K.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
| | - Stefan Kehraus
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany;
| | - Andrea Schiefer
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
| | - Christian Steinebach
- Pharmaceutical & Medicinal Chemistry, University of Bonn, 53121 Bonn, Germany; (C.S.); (M.G.)
| | - Tilman Aden
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
| | - Stefan J. Frohberger
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
| | - Álvaro López Mármol
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121 Bonn, Germany; (A.K.K.); (T.B.); (Á.L.M.); (D.K.)
| | - Dnyaneshwar Kapote
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121 Bonn, Germany; (A.K.K.); (T.B.); (Á.L.M.); (D.K.)
| | - Rolf Jansen
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany; (R.J.); (L.C.-M.); (M.S.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Lillibeth Chaverra-Muñoz
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany; (R.J.); (L.C.-M.); (M.S.)
| | - Marc P. Hübner
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
| | - Kenneth Pfarr
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
| | - Thomas Hesterkamp
- Translational Project Management Office (TPMO), German Center for Infection Research (DZIF), 38124 Braunschweig, Germany;
| | - Marc Stadler
- Department of Microbial Drugs, Helmholtz Centre for Infection Research, 38124 Braunschweig, Germany; (R.J.); (L.C.-M.); (M.S.)
- German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, 38124 Braunschweig, Germany
| | - Michael Gütschow
- Pharmaceutical & Medicinal Chemistry, University of Bonn, 53121 Bonn, Germany; (C.S.); (M.G.)
| | - Gabriele M. König
- Institute for Pharmaceutical Biology, University of Bonn, 53115 Bonn, Germany;
| | - Achim Hoerauf
- Institute for Medical Microbiology, Immunology and Parasitology, University Hospital Bonn, 53127 Bonn, Germany; (A.S.); (T.A.); (S.J.F.); (M.P.H.); (K.P.); (A.H.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
| | - Karl G. Wagner
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Bonn, 53121 Bonn, Germany; (A.K.K.); (T.B.); (Á.L.M.); (D.K.)
- German Center for Infection Research (DZIF), Partner Site Bonn-Cologne, 53127 Bonn, Germany;
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10
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Bader CD, Panter F, Müller R. In depth natural product discovery - Myxobacterial strains that provided multiple secondary metabolites. Biotechnol Adv 2019; 39:107480. [PMID: 31707075 DOI: 10.1016/j.biotechadv.2019.107480] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2019] [Revised: 11/05/2019] [Accepted: 11/06/2019] [Indexed: 12/28/2022]
Abstract
In recognition of many microorganisms ability to produce a variety of secondary metabolites in parallel, Zeeck and coworkers introduced the term "OSMAC" (one strain many compounds) around the turn of the century. Since then, additional efforts focused on the systematic characterization of a single bacterial species ability to form multiple secondary metabolite scaffolds. With the beginning of the genomic era mainly initiated by a dramatic reduction of sequencing costs, investigations of the genome encoded biosynthetic potential and especially the exploitation of biosynthetic gene clusters of undefined function gained attention. This was seen as a novel means to extend range and diversity of bacterial secondary metabolites. Genome analyses showed that even for well-studied bacterial strains, like the myxobacterium Myxococcus xanthus DK1622, many biosynthetic gene clusters are not yet assigned to their corresponding hypothetical secondary metabolites. In contrast to the results from emerging genome and metabolome mining techniques that show the large untapped biosynthetic potential per strain, many newly isolated bacterial species are still used for the isolation of only one target compound class and successively abandoned in the sense that no follow up studies are published from the same species. This work provides an overview about myxobacterial bacterial strains, from which not just one but multiple different secondary metabolite classes were successfully isolated. The underlying methods used for strain prioritization and natural product discovery such as biological characterization of crude extracts against a panel of pathogens, in-silico prediction of secondary metabolite abundance from genome data and state of the art instrumental analytics required for new natural product scaffold discovery in comparative settings are summarized and classified according to their output. Furthermore, for each approach selected studies performed with actinobacteria are shown to underline especially innovative methods used for natural product discovery.
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Affiliation(s)
- Chantal D Bader
- Department Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany; German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany
| | - Fabian Panter
- Department Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany; German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany
| | - Rolf Müller
- Department Microbial Natural Products, Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Centre for Infection Research (HZI) and Department of Pharmacy, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany; German Center for Infection Research (DZIF), Partner Site Hannover-Braunschweig, Germany.
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11
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Livingstone PG, Morphew RM, Whitworth DE. Genome Sequencing and Pan-Genome Analysis of 23 Corallococcus spp. Strains Reveal Unexpected Diversity, With Particular Plasticity of Predatory Gene Sets. Front Microbiol 2018; 9:3187. [PMID: 30619233 PMCID: PMC6306037 DOI: 10.3389/fmicb.2018.03187] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2018] [Accepted: 12/10/2018] [Indexed: 11/13/2022] Open
Abstract
Corallococcus is an abundant genus of predatory soil myxobacteria, containing two species, C. coralloides (for which a genome sequence is available) and C. exiguus. To investigate the genomic basis of predation, we genome-sequenced 23 Corallococcus strains. Genomic similarity metrics grouped the sequenced strains into at least nine distinct genomospecies, divided between two major sub-divisions of the genus, encompassing previously described diversity. The Corallococcus pan-genome was found to be open, with strains exhibiting highly individual gene sets. On average, only 30.5% of each strain's gene set belonged to the core pan-genome, while more than 75% of the accessory pan-genome genes were present in less than four of the 24 genomes. The Corallococcus accessory pan-proteome was enriched for the COG functional category "Secondary metabolism," with each genome containing on average 55 biosynthetic gene clusters (BGCs), of which only 20 belonged to the core pan-genome. Predatory activity was assayed against ten prey microbes and found to be mostly incongruent with phylogeny or BGC complement. Thus, predation seems multifactorial, depending partially on BGC complement, but also on the accessory pan-genome - genes most likely acquired horizontally. These observations encourage further exploration of Corallococcus as a source for novel bioactive secondary metabolites and predatory proteins.
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Affiliation(s)
- Paul G Livingstone
- Institute of Biological Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
| | - Russell M Morphew
- Institute of Biological Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
| | - David E Whitworth
- Institute of Biological Environmental and Rural Sciences, Aberystwyth University, Aberystwyth, United Kingdom
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12
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Dehhaghi M, Mohammadipanah F, Guillemin GJ. Myxobacterial natural products: An under-valued source of products for drug discovery for neurological disorders. Neurotoxicology 2018; 66:195-203. [PMID: 29499217 DOI: 10.1016/j.neuro.2018.02.017] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2017] [Revised: 02/26/2018] [Accepted: 02/27/2018] [Indexed: 12/18/2022]
Abstract
Age-related disorders impose noticeable financial and emotional burdens on society. This impact is becoming more prevalent with the increasing incidence of neurodegenerative diseases and is causing critical concerns for treatment of patients worldwide. Parkinson's disease, Alzheimer's disease, multiple sclerosis and motor neuron disease are the most prevalent and the most expensive to treat neurodegenerative diseases globally. Therefore, exploring effective therapies to overcome these disorders is a necessity. Natural products and their derivatives have increasingly attracted attention in drug discovery programs that have identified microorganisms which produce a large range of metabolites with bioactive properties. Myxobacteria, a group of Gram-negative bacteria with large genome size, produce a wide range of secondary metabolites with significant chemical structures and a variety of biological effects. They are potent natural product producers. In this review paper, we attempt to overview some secondary metabolites synthesized by myxobacteria with neuroprotective activity through known mechanisms including production of polyunsaturated fatty acids, reduction of apoptosis, immunomodulation, stress reduction of endoplasmic reticulum, stabilization of microtubules, enzyme inhibition and serotonin receptor modulation.
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Affiliation(s)
- Mona Dehhaghi
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran; Neuropharmacology Group, Faculty of Medicine and Health Sciences, Macquarie University, NSW, Australia
| | - Fatemeh Mohammadipanah
- Department of Microbial Biotechnology, School of Biology and Center of Excellence in Phylogeny of Living Organisms, College of Science, University of Tehran, Tehran, Iran.
| | - Gilles J Guillemin
- Neuropharmacology Group, Faculty of Medicine and Health Sciences, Macquarie University, NSW, Australia.
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13
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Saavedra CJ, Hernández D, Boto A. Metal-Free, Site-Selective Peptide Modification by Conversion of “Customizable” Units into β-Substituted Dehydroamino Acids. Chemistry 2017; 24:599-607. [DOI: 10.1002/chem.201703758] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2017] [Indexed: 12/18/2022]
Affiliation(s)
- Carlos J. Saavedra
- Instituto de Productos Naturales y Agrobiología, CSIC (Spanish Research Council); Avda. Astrofísico Fco. Sánchez 3 38206 La Laguna Tenerife SPAIN
| | - Dácil Hernández
- Instituto de Productos Naturales y Agrobiología, CSIC (Spanish Research Council); Avda. Astrofísico Fco. Sánchez 3 38206 La Laguna Tenerife SPAIN
| | - Alicia Boto
- Instituto de Productos Naturales y Agrobiología, CSIC (Spanish Research Council); Avda. Astrofísico Fco. Sánchez 3 38206 La Laguna Tenerife SPAIN
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14
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Livingstone PG, Morphew RM, Whitworth DE. Myxobacteria Are Able to Prey Broadly upon Clinically-Relevant Pathogens, Exhibiting a Prey Range Which Cannot Be Explained by Phylogeny. Front Microbiol 2017; 8:1593. [PMID: 28878752 PMCID: PMC5572228 DOI: 10.3389/fmicb.2017.01593] [Citation(s) in RCA: 54] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2017] [Accepted: 08/04/2017] [Indexed: 11/28/2022] Open
Abstract
Myxobacteria are natural predators of microorganisms and the subjects of concerted efforts to identify novel antimicrobial compounds. Myxobacterial predatory activity seems to require more than just the possession of specific antimicrobial metabolites. Thus a holistic approach to studying predation promises novel insights into antimicrobial action. Here, we report the isolation of 113 myxobacteria from samples of soil taken from a range of habitats in mid Wales. Predatory activity of each isolate was quantified against a panel of clinically important prey organisms, including Klebsiella pneumoniae, Proteus mirabilis, Candida albicans, Enterococcus faecalis, and three species of Staphylococcus. Myxobacterial isolates exhibited a wide range of predation activity profiles against the panel of prey. Efficient predation of all prey by isolates within the collection was observed, with K. pneumoniae and C. albicans proving particularly susceptible to myxobacterial predation. Notably efficient predators tended to be proficient at predating multiple prey organisms, suggesting they possess gene(s) encoding a broad range killing activity. However, predatory activity was not congruent with phylogeny, suggesting prey range is subject to relatively rapid specialization, potentially involving lateral gene transfer. The broad but patchy prey ranges observed for natural myxobacterial isolates also implies multiple (potentially overlapping) genetic determinants are responsible for dictating predatory activity.
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Affiliation(s)
- Paul G Livingstone
- Institute of Biological Environmental and Rural Sciences, Aberystwyth UniversityAberystwyth, United Kingdom
| | - Russell M Morphew
- Institute of Biological Environmental and Rural Sciences, Aberystwyth UniversityAberystwyth, United Kingdom
| | - David E Whitworth
- Institute of Biological Environmental and Rural Sciences, Aberystwyth UniversityAberystwyth, United Kingdom
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15
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Herrmann J, Fayad AA, Müller R. Natural products from myxobacteria: novel metabolites and bioactivities. Nat Prod Rep 2016; 34:135-160. [PMID: 27907217 DOI: 10.1039/c6np00106h] [Citation(s) in RCA: 152] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Covering: 2011-July 2016Myxobacteria are a rich source for structurally diverse secondary metabolites with intriguing biological activities. Here we report on new natural products that were isolated from myxobacteria in the period of 2011 to July 2016. Some examples of recent advances on modes-of-action are also summarised along with a more detailed overview on five compound classes currently assessed in preclinical studies.
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Affiliation(s)
- J Herrmann
- Helmholtz Institute for Pharmaceutical Research Saarland, Department of Microbial Natural Products, Helmholtz Centre for Infection Research and Department of Pharmaceutical Biotechnology, Saarland University, Campus E8.1, 66123 Saarbrücken, Germany.
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16
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Dong HR, Chen ZB, Li RS, Dong HS, Xie ZX. Convenient and efficient synthesis of disubstituted piperazine derivatives by catalyst-free, atom-economical and tricomponent domino reactions. RSC Adv 2015. [DOI: 10.1039/c4ra14811h] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
One-pot, atom-economical, catalyst-free and tri-component domino reactions are applied to diversity-oriented synthesis (DOS) of disubstituted piperazine derivatives under mild conditions with moderate to high yields.
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Affiliation(s)
- Hong-Ru Dong
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry
- Institute of Organic Chemistry
- Lanzhou University
- Lanzhou
| | - Zi-Bao Chen
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry
- Institute of Organic Chemistry
- Lanzhou University
- Lanzhou
| | - Rong-Shan Li
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry
- Institute of Organic Chemistry
- Lanzhou University
- Lanzhou
| | - Heng-Shan Dong
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry
- Institute of Organic Chemistry
- Lanzhou University
- Lanzhou
| | - Zhi-Xiang Xie
- College of Chemistry and Chemical Engineering
- State Key Laboratory of Applied Organic Chemistry
- Institute of Organic Chemistry
- Lanzhou University
- Lanzhou
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