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Lu Y, Liu D, Jiang R, Li Z, Gao X. Prodigiosin: unveiling the crimson wonder - a comprehensive journey from diverse bioactivity to synthesis and yield enhancement. Front Microbiol 2024; 15:1412776. [PMID: 38903802 PMCID: PMC11188435 DOI: 10.3389/fmicb.2024.1412776] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2024] [Accepted: 05/24/2024] [Indexed: 06/22/2024] Open
Abstract
Prodigiosin (PG) is a red tripyrrole pigment from the prodiginine family that has attracted widespread attention due to its excellent biological activities, including anticancer, antibacterial and anti-algal activities. The synthesis and production of PG is of particular significance, as it has the potential to be utilized in a number of applications, including those pertaining to clinical drug development, food safety, and environmental management. This paper provides a systematic review of recent research on PG, covering aspects like chemical structure, bioactivity, biosynthesis, gene composition and regulation, and optimization of production conditions, with a particular focus on the biosynthesis and regulation of PG in Serratia marcescens. This provides a solid theoretical basis for the drug development and production of PG, and is expected to promote the further development of PG in medicine and other applications.
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Affiliation(s)
- Yonglin Lu
- Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Derun Liu
- Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
| | - Renhui Jiang
- Jinan Vocational College of Nursing, Jinan, China
| | - Ziyun Li
- Department of Biostatistics, School of Public Health, Cheeloo College of Medicine, Shandong University, Jinan, China
| | - Xueyan Gao
- Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, China
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2
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Diken-Gür S. Investigation of anti-adherence and antimicrobial properties of prodigiosin-functionalized bacterial cellulose membrane for biomedical applications. J Biotechnol 2024; 385:58-64. [PMID: 38458539 DOI: 10.1016/j.jbiotec.2024.03.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 02/29/2024] [Accepted: 03/03/2024] [Indexed: 03/10/2024]
Abstract
In this study, novel biomaterial that consisted entirely of bacterial products was developed with the approach of designing cost effective material for biomedical applications. With this aim, bacterial cellulose membranes (BCMs) which synthesized by Komagataeibacter intermedius were produced. Moreover, to impart antimicrobial properties to enhance the capacity of BCMs for biomedical usage, prodigiosin (PG) pigment of Serratia marcescens which presents wide range of antimicrobial activities was loaded to BCMs. Firstly, high yield of PG production was achieved, and then crude pigment was purified with silica gel column. The purified PG was characterized with thin layer chromatography and UV-visible spectrometry. The antimicrobial effect of the produced pigment on Gram-positive and negative bacteria and a yeast was investigated. The success of modification in PG-modified BCMs has been demonstrated by FTIR and SEM. Moreover, antimicrobial and antiadhesive ability of novel PG-BCMs were examined with disc diffusion and plate counting methods. As a result, it was established that PG-BCMs were able to inhibit the growth of all tested microorganisms. Furthermore, excellent antiadhesive effect was observed for the tested microorganisms with the inhibition rates of 82.05-96.25 %. Finally, cytotoxicity test with L929 cell line demonstrated that PG-BCM is biocompatible at a level that can be applied in in vivo studies.
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Affiliation(s)
- Sinem Diken-Gür
- Hacettepe University, Faculty of Science, Department of Biology, Ankara, Turkey.
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3
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Akermi S, Smaoui S, Chaari M, Elhadef K, Gentile R, Hait M, Roymahapatra G, Mellouli L. Combined in vitro/in silico approaches, molecular dynamics simulations and safety assessment of the multifunctional properties of thymol and carvacrol: A comparative insight. Chem Biodivers 2024; 21:e202301575. [PMID: 38116885 DOI: 10.1002/cbdv.202301575] [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: 10/07/2023] [Revised: 12/11/2023] [Accepted: 12/18/2023] [Indexed: 12/21/2023]
Abstract
Bioactive compounds derived from medicinal plants have acquired immense attentiveness in drug discovery and development. The present study investigated in vitro and predicted in silico the antibacterial, antifungal, and antiviral properties of thymol and carvacrol, and assessed their safety. The performed microbiological assays against Pseudomonas aeruginosa, Escherichia coli, Salmonella enterica Typhimurium revealed that the minimal inhibitory concentration values ranged from (0.078 to 0.312 mg/mL) and the minimal fungicidal concentration against Candida albicans was 0.625 mg/mL. Molecular docking simulations, stipulated that these compounds could inhibit bacterial replication and transcription functions by targeting DNA and RNA polymerases receptors with docking scores varying between (-5.1 to -6.9 kcal/mol). Studied hydroxylated monoterpenes could hinder C. albicans growth by impeding lanosterol 14α-demethylase enzyme and showed a (ΔG=-6.2 and -6.3 kcal/mol). Computational studies revealed that thymol and carvacrol could target the SARS-Cov-2 spike protein of the Omicron variant RBD domain. Molecular dynamics simulations disclosed that these compounds have a stable dynamic behavior over 100 ns as compared to remdesivir. Chemo-computational toxicity prediction using Protox II webserver indicated that thymol and carvacrol could be safely and effectively used as drug candidates to tackle bacterial, fungal, and viral infections as compared to chemical medication.
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Affiliation(s)
- Sarra Akermi
- Laboratory of Microbial and Enzymatic Biotechnologies and Biomolecules. Center of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, Sfax, 3018, Sfax-, Tunisia
| | - Slim Smaoui
- Laboratory of Microbial and Enzymatic Biotechnologies and Biomolecules. Center of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, Sfax, 3018, Sfax-, Tunisia
| | - Moufida Chaari
- Laboratory of Microbial and Enzymatic Biotechnologies and Biomolecules. Center of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, Sfax, 3018, Sfax-, Tunisia
| | - Khaoula Elhadef
- Laboratory of Microbial and Enzymatic Biotechnologies and Biomolecules. Center of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, Sfax, 3018, Sfax-, Tunisia
| | - Rocco Gentile
- Institute for Pharmaceutical and Medicinal Chemistry, Heinrich Heine University Düsseldorf, 40225, Düsseldorf, Germany
| | - Milan Hait
- Department of Chemistry, Dr. C. V. Raman University, Kota, 495113, Bilaspur, India
| | | | - Lotfi Mellouli
- Laboratory of Microbial and Enzymatic Biotechnologies and Biomolecules. Center of Biotechnology of Sfax (CBS), University of Sfax, Road of Sidi Mansour Km 6, P.O. Box 1177, Sfax, 3018, Sfax-, Tunisia
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Boby F, Bhuiyan MNH, Saha BK, Dey SS, Saha AK, Islam MJ, Bashera MA, Moulick SP, Jahan F, Zaman MAU, Chowdhury SF, Naser SR, Khan MS, Sarkar MMH. In silico exploration of Serratia sp. BRL41 genome for detecting prodigiosin Biosynthetic Gene Cluster (BGC) and in vitro antimicrobial activity assessment of secreted prodigiosin. PLoS One 2023; 18:e0294054. [PMID: 37967102 PMCID: PMC10651056 DOI: 10.1371/journal.pone.0294054] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Accepted: 10/24/2023] [Indexed: 11/17/2023] Open
Abstract
The raising concern of drug resistance, having substantial impacts on public health, has instigated the search of new natural compounds with substantial medicinal activity. In order to find out a natural solution, the current study has utilized prodigiosin, a linear tripyrrole red pigment, as an active ingredient to control bacterial proliferation and prevent cellular oxidation caused by ROS (Reactive Oxygen Species). A prodigiosin-producing bacterium BRL41 was isolated from the ancient Barhind soil of BCSIR Rajshahi Laboratories, Bangladesh, and its morphological and biochemical characteristics were investigated. Whole genome sequencing data of the isolate revealed its identity as Serratia sp. and conferred the presence of prodigiosin gene cluster in the bacterial genome. "Prodigiosin NRPS", among the 10 analyzed gene clusters, showed 100% similarity with query sequences where pigC, pigH, pigI, and pigJ were identified as fundamental genes for prodigiosin biosynthesis. Some other prominent clusters for synthesis of ririwpeptides, yersinopine, trichrysobactin were also found in the chromosome of BRL41, whilst the rest displayed less similarity with query sequences. Except some first-generation beta-lactam resistance genes, no virulence and resistance genes were found in the genome of BRL41. Structural illumination of the extracted red pigment by spectrophotometric scanning, Thin-Layer Chromatography (TLC), Fourier Transform Infrared Spectroscopy (FTIR), and change of color at different pH solutions verified the identity of the isolated compound as prodigiosin. Serratia sp. BRL41 attained its maximum productivity 564.74 units/cell at temperature 30˚C and pH 7.5 in two-fold diluted nutrient broth medium. The compound exhibited promising antibacterial activity against Gram-positive and Gram-negative bacteria with MIC (Minimum Inhibitory Concentration) and MBC (Minimum Bactericidal Concentration) values ranged from 3.9 to15.62 μg/mL and 7.81 to 31.25 μg/mL respectively. At concentration 500 μg/mL, except in Salmonella enterica ATCC-10708, prodigiosin significantly diminished biofilm formed by Listeria monocytogens ATCC-3193, Pseudomonas aeruginosa ATCC-9027, Escherichia coli (environmental isolate), Staphylococcus aureus (environmental isolate). Cellular glutathione level (GSH) was elevated upon application of 250 and 500 μg/mL pigment where 125 μg/mL failed to show any free radical scavenging activity. Additionally, release of cellular components in growth media of both Gram-positive and Gram-negative bacteria were facilitated by the extract that might be associated with cell membrane destabilization. Therefore, the overall findings of antimicrobial, antibiofilm and antioxidant activities suggest that in time to come prodigiosin might be a potential natural source to treat various diseases and infections.
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Affiliation(s)
- Farhana Boby
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Md. Nurul Huda Bhuiyan
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Barun Kanti Saha
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Subarna Sandhani Dey
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Anik Kumar Saha
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Md Jahidul Islam
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Mahci Al Bashera
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Shyama Prosad Moulick
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Farhana Jahan
- BCSIR Rajshahi Laboratories, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | | | - Sanjana Fatema Chowdhury
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Showti Raheel Naser
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Md. Salim Khan
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
| | - Md. Murshed Hasan Sarkar
- BCSIR Laboratories, Dhaka, Bangladesh Council of Scientific and Industrial Research (BCSIR), Dhaka, Bangladesh
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Tan Y, Chen Y, Liu X, Tang Y, Lao Z, Wei G. Dissecting how ALS-associated D290V mutation enhances pathogenic aggregation of hnRNPA2 286-291 peptides: Dynamics and conformational ensembles. Int J Biol Macromol 2023; 241:124659. [PMID: 37119915 DOI: 10.1016/j.ijbiomac.2023.124659] [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: 03/20/2023] [Revised: 04/22/2023] [Accepted: 04/24/2023] [Indexed: 05/01/2023]
Abstract
The aggregation of RNA binding proteins, including hnRNPA1/2, TDP-43 and FUS, is heavily implicated in causing or increasing disease risk for a series of neurodegenerative diseases such as amyotrophic lateral sclerosis (ALS). A recent experimental study demonstrated that an ALS-related D290V mutation in the low complexity domain (LCD) of hnRNPA2 can enhance the aggregation propensity of wild type (WT) hnRNPA2286-291 peptide. However, the underlying molecular mechanisms remain elusive. Herein, we investigated effects of D290V mutation on aggregation dynamics of hnRNPA2286-291 peptide and the conformational ensemble of hnRNPA2286-291 oligomers by performing all-atom molecular dynamic and replica-exchange molecular dynamic simulations. Our simulations demonstrate that D290V mutation greatly reduces the dynamics of hnRNPA2286-291 peptide and that D290V oligomers possess higher compactness and β-sheet content than WT, indicative of mutation-enhanced aggregation capability. Specifically, D290V mutation strengthens inter-peptide hydrophobic, main-chain hydrogen bonding and side-chain aromatic stacking interactions. Those interactions collectively lead to the enhancement of aggregation capability of hnRNPA2286-291 peptides. Overall, our study provides insights into the dynamics and thermodynamic mechanisms underlying D290V-induced disease-causing aggregation of hnRNPA2286-291, which could contribute to better understanding of the transitions from reversible condensates to irreversible pathogenic aggregates of hnRNPA2 LCD in ALS-related diseases.
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Affiliation(s)
- Yuan Tan
- Department of Physics, Fudan University, Shanghai 200438, People's Republic of China; State Key Laboratory of Surface Physics, Fudan University, Shanghai 200438, People's Republic of China; Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University, Shanghai 200438, People's Republic of China
| | - Yujie Chen
- Department of Physics, Fudan University, Shanghai 200438, People's Republic of China; State Key Laboratory of Surface Physics, Fudan University, Shanghai 200438, People's Republic of China; Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University, Shanghai 200438, People's Republic of China
| | - Xianshi Liu
- Department of Physics, Fudan University, Shanghai 200438, People's Republic of China; State Key Laboratory of Surface Physics, Fudan University, Shanghai 200438, People's Republic of China; Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University, Shanghai 200438, People's Republic of China
| | - Yiming Tang
- Department of Physics, Fudan University, Shanghai 200438, People's Republic of China; State Key Laboratory of Surface Physics, Fudan University, Shanghai 200438, People's Republic of China; Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University, Shanghai 200438, People's Republic of China
| | - Zenghui Lao
- Department of Physics, Fudan University, Shanghai 200438, People's Republic of China; State Key Laboratory of Surface Physics, Fudan University, Shanghai 200438, People's Republic of China; Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University, Shanghai 200438, People's Republic of China
| | - Guanghong Wei
- Department of Physics, Fudan University, Shanghai 200438, People's Republic of China; State Key Laboratory of Surface Physics, Fudan University, Shanghai 200438, People's Republic of China; Key Laboratory for Computational Physical Sciences (Ministry of Education), Fudan University, Shanghai 200438, People's Republic of China.
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6
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Liang J, Lin H, Singh B, Wang A, Yan Z. A global perspective on compositions, risks, and ecological genesis of antibiotic resistance genes in biofilters of drinking water treatment plants. WATER RESEARCH 2023; 233:119822. [PMID: 36871385 DOI: 10.1016/j.watres.2023.119822] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2023] [Revised: 02/16/2023] [Accepted: 02/25/2023] [Indexed: 06/18/2023]
Abstract
Antibiotic resistance genes (ARGs) in biofilters of drinking water treatment plants (DWTPs) are regarded to be a remarkable potential health risk to human. A global survey on ARGs in biofilters may help evaluate their risk features as a whole. This study aims to explore the compositions, risks, and ecological genesis of ARGs in the biofilters of DWTPs. In total, 98 metagenomes of DWTP biofilters were collected from Sequence Read Archive (SRA) of National center for Biotechnology Information (NCBI), and the main ARG types were recognized, with multidrug, bacitracin, and beta-lactam as the first three types. Source water types (surface water vs. groundwater) were found to significantly influence antibiotic resistome, overpassing biofilter media and locations. Although ARG abundances of surface water biofilters were approximately five times higher than that of groundwater biofilters, the risk pattern of ARGs was highly similar between surface water biofilters and groundwater biofilters, and up to 99.61% of the ARGs on average belong to the least risk and unassessed ranks, and only 0.23% the highest risk rank. Monobactam biosynthesis pathway and prodigiosin biosynthesis pathway, two antibiotics biosynthesis pathways, were observed to be positively correlated with several ARG types and total ARG abundance in samples of surface water and groundwater biofilters, respectively, suggesting their potential roles in ecological genesis of ARGs. Overall, the results of this study would deepen our understanding of the ARG risks in biofilters of DWTPs and shed light on their ecological genesis inside.
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Affiliation(s)
- Jinsong Liang
- School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, 518055, China.
| | - Huan Lin
- School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Brajesh Singh
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, 2751, NSW Australia; Global Centre for Land-Based Innovation, Western Sydney University, Penrith, 2751, NSW Australia
| | - Aijie Wang
- School of Civil and Environmental Engineering, Harbin Institute of Technology, Shenzhen, 518055, China
| | - Zhenzhen Yan
- Hawkesbury Institute for the Environment, Western Sydney University, Penrith, 2751, NSW Australia
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Hu R, Wu L, Cheng Q, Chen S, Shen T, Lan D, Ma Y, Wang Y. Structural variations and phospholipid binding characteristics of Streptomyces klenkii phospholipase D at the lipid-water interface. Lebensm Wiss Technol 2023. [DOI: 10.1016/j.lwt.2023.114672] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023]
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Kossmann DF, Huang M, Weihmann R, Xiao X, Gätgens F, Weber TM, Brass HUC, Bitzenhofer NL, Ibrahim S, Bangert K, Rehling L, Mueller C, Tiso T, Blank LM, Drepper T, Jaeger KE, Grundler FMW, Pietruszka J, Schleker ASS, Loeschcke A. Production of tailored hydroxylated prodiginine showing combinatorial activity with rhamnolipids against plant-parasitic nematodes. Front Microbiol 2023; 14:1151882. [PMID: 37200918 PMCID: PMC10187637 DOI: 10.3389/fmicb.2023.1151882] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2023] [Accepted: 04/03/2023] [Indexed: 05/20/2023] Open
Abstract
Bacterial secondary metabolites exhibit diverse remarkable bioactivities and are thus the subject of study for different applications. Recently, the individual effectiveness of tripyrrolic prodiginines and rhamnolipids against the plant-parasitic nematode Heterodera schachtii, which causes tremendous losses in crop plants, was described. Notably, rhamnolipid production in engineered Pseudomonas putida strains has already reached industrial implementation. However, the non-natural hydroxyl-decorated prodiginines, which are of particular interest in this study due to a previously described particularly good plant compatibility and low toxicity, are not as readily accessible. In the present study, a new effective hybrid synthetic route was established. This included the engineering of a novel P. putida strain to provide enhanced levels of a bipyrrole precursor and an optimization of mutasynthesis, i.e., the conversion of chemically synthesized and supplemented monopyrroles to tripyrrolic compounds. Subsequent semisynthesis provided the hydroxylated prodiginine. The prodiginines caused reduced infectiousness of H. schachtii for Arabidopsis thaliana plants resulting from impaired motility and stylet thrusting, providing the first insights on the mode of action in this context. Furthermore, the combined application with rhamnolipids was assessed for the first time and found to be more effective against nematode parasitism than the individual compounds. To obtain, for instance, 50% nematode control, it was sufficient to apply 7.8 μM hydroxylated prodiginine together with 0.7 μg/ml (~ 1.1 μM) di-rhamnolipids, which corresponded to ca. ¼ of the individual EC50 values. In summary, a hybrid synthetic route toward a hydroxylated prodiginine was established and its effects and combinatorial activity with rhamnolipids on plant-parasitic nematode H. schachtii are presented, demonstrating potential application as antinematodal agents. Graphical Abstract.
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Affiliation(s)
- D. F. Kossmann
- Institute of Bio- and Geosciences (IBG-1): Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
- Institute of Bioorganic Chemistry, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - M. Huang
- INRES, Molecular Phytomedicine, University of Bonn, Bonn, Germany
| | - R. Weihmann
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - X. Xiao
- INRES, Molecular Phytomedicine, University of Bonn, Bonn, Germany
| | - F. Gätgens
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - T. M. Weber
- Institute of Bioorganic Chemistry, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - H. U. C. Brass
- Institute of Bioorganic Chemistry, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - N. L. Bitzenhofer
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - S. Ibrahim
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - K. Bangert
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - L. Rehling
- INRES, Molecular Phytomedicine, University of Bonn, Bonn, Germany
| | - C. Mueller
- iAMB—Institute of Applied Microbiology, ABBt—Aachen Biology and Biotechnology, RWTH Aachen University, Aachen, Germany
| | - T. Tiso
- iAMB—Institute of Applied Microbiology, ABBt—Aachen Biology and Biotechnology, RWTH Aachen University, Aachen, Germany
| | - L. M. Blank
- iAMB—Institute of Applied Microbiology, ABBt—Aachen Biology and Biotechnology, RWTH Aachen University, Aachen, Germany
| | - T. Drepper
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | - K.-E. Jaeger
- Institute of Bio- and Geosciences (IBG-1): Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
| | | | - J. Pietruszka
- Institute of Bio- and Geosciences (IBG-1): Biotechnology, Forschungszentrum Jülich GmbH, Jülich, Germany
- Institute of Bioorganic Chemistry, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
- *Correspondence: J. Pietruszka,
| | - A. S. S. Schleker
- INRES, Molecular Phytomedicine, University of Bonn, Bonn, Germany
- A. S. S. Schleker,
| | - A. Loeschcke
- Institute of Molecular Enzyme Technology, Forschungszentrum Jülich, Heinrich Heine University Düsseldorf, Jülich, Germany
- A. Loeschcke,
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Structures, biosynthesis, and bioactivities of prodiginine natural products. Appl Microbiol Biotechnol 2022; 106:7721-7735. [DOI: 10.1007/s00253-022-12245-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 10/06/2022] [Accepted: 10/12/2022] [Indexed: 11/17/2022]
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10
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Islan GA, Rodenak-Kladniew B, Noacco N, Duran N, Castro GR. Prodigiosin: a promising biomolecule with many potential biomedical applications. Bioengineered 2022; 13:14227-14258. [PMID: 35734783 PMCID: PMC9342244 DOI: 10.1080/21655979.2022.2084498] [Citation(s) in RCA: 18] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Pigments are among the most fascinating molecules found in nature and used by human civilizations since the prehistoric ages. Although most of the bio-dyes reported in the literature were discovered around the eighties, the necessity to explore novel compounds for new biological applications has made them resurface as potential alternatives. Prodigiosin (PG) is an alkaloid red bio-dye produced by diverse microorganisms and composed of a linear tripyrrole chemical structure. PG emerges as a really interesting tool since it shows a wide spectrum of biological activities, such as antibacterial, antifungal, algicidal, anti-Chagas, anti-amoebic, antimalarial, anticancer, antiparasitic, antiviral, and/or immunosuppressive. However, PG vehiculation into different delivery systems has been proposed since possesses low bioavailability because of its high hydrophobic character (XLogP3-AA = 4.5). In the present review, the general aspects of the PG correlated with synthesis, production process, and biological activities are reported. Besides, some of the most relevant PG delivery systems described in the literature, as well as novel unexplored applications to potentiate its biological activity in biomedical applications, are proposed.
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Affiliation(s)
- German A Islan
- Desarrollo en Fermentaciones Industriales (CINDEFI), Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP) -CONICET (CCT La Plata)Laboratorio de Nanobiomateriales, Centro de Investigación y , La Plata, Argentina
| | - Boris Rodenak-Kladniew
- Facultad de Ciencias Médicas, Instituto de Investigaciones Bioquímicas de La Plata (INIBIOLP), CONICET-UNLP, CCT-La Plata, La Plata, Pcia de Bueos aires, Argentina
| | - Nehuen Noacco
- Desarrollo en Fermentaciones Industriales (CINDEFI), Facultad de Ciencias Exactas, Universidad Nacional de La Plata (UNLP) -CONICET (CCT La Plata)Laboratorio de Nanobiomateriales, Centro de Investigación y , La Plata, Argentina
| | - Nelson Duran
- Laboratory of Urogenital Carcinogenesis and Immunotherapy, Biological Institute, Department of Structural and Functional Biology, University of Campinas, Campinas, Brazil.,Nanomedicine Research Unit (Nanomed), Federal University of Abc (Ufabc), Santo André, Brazil
| | - Guillermo R Castro
- Laboratory of Urogenital Carcinogenesis and Immunotherapy, Biological Institute, Department of Structural and Functional Biology, University of Campinas, Campinas, Brazil.,. Partner Laboratory of the Max Planck Institute for Biophysical Chemistry (MPIbpC, MPG). Centro de Estudios Interdisciplinarios (CEI), Universidad Nacional de RosarioMax Planck Laboratory for Structural Biology, Chemistry and Molecular Biophysics of Rosario (MPLbioR, UNR-MPIbpC), Rosario, Argentina
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11
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Ji H, Zhao W, Yu Z, Wu S. Mechanism of interactions between egg protein–derived tri‐peptides and cellular membrane by molecular dynamic simulation and isothermal titration calorimetry. Int J Food Sci Technol 2022. [DOI: 10.1111/ijfs.15736] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Huizhuo Ji
- School of Food Science and Engineering Hainan University Haikou 570228 China
- College of Food Science and Engineering Bohai University Jinzhou 121013 China
| | - Wenzhu Zhao
- School of Food Science and Engineering Hainan University Haikou 570228 China
| | - Zhipeng Yu
- School of Food Science and Engineering Hainan University Haikou 570228 China
| | - Sijia Wu
- College of Food Science and Engineering Bohai University Jinzhou 121013 China
- Lab of Nutrition and Functional Food Jilin University Changchun 130062 China
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12
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Antibacterial, antibiofilm and cytotoxic properties of prodigiosin produced by a newly isolated Serratia sp. C6LB from a milk collection center. Microb Pathog 2022; 164:105449. [DOI: 10.1016/j.micpath.2022.105449] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2021] [Revised: 02/14/2022] [Accepted: 02/15/2022] [Indexed: 11/23/2022]
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13
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Jeong YJ, Kim HJ, Kim S, Park SY, Kim H, Jeong S, Lee SJ, Lee MS. Enhanced Large-Scale Production of Hahella chejuensis-Derived Prodigiosin and Evaluation of Its Bioactivity. J Microbiol Biotechnol 2021; 31:1624-1631. [PMID: 34675142 PMCID: PMC9705908 DOI: 10.4014/jmb.2109.09039] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 10/11/2021] [Accepted: 10/12/2021] [Indexed: 12/15/2022]
Abstract
Prodigiosin as a high-valued compound, which is a microbial secondary metabolite, has the potential for antioxidant and anticancer effects. However, the large-scale production of functionally active Hahella chejuensis-derived prodigiosin by fermentation in a cost-effective manner has yet to be achieved. In the present study, we established carbon source-optimized medium conditions, as well as a procedure for producing prodigiosin by fermentation by culturing H. chejuensis using 10 L and 200 L bioreactors. Our results showed that prodigiosin productivity using 250 ml flasks was higher in the presence of glucose than other carbon sources, including mannose, sucrose, galactose, and fructose, and could be scaled up to 10 L and 200 L batches. Productivity in the glucose (2.5 g/l) culture while maintaining the medium at pH 6.89 during 10 days of cultivation in the 200 L bioreactor was measured and increased more than productivity in the basal culture medium in the absence of glucose. Prodigiosin production from 10 L and 200 L fermentation cultures of H. chejuensis was confirmed by high-performance liquid chromatography (HPLC) and liquid chromatography-mass spectrometry (LC-MS) analyses for more accurate identification. Finally, the anticancer activity of crude extracted prodigiosin against human cancerous leukemia THP-1 cells was evaluated and confirmed at various concentrations. Conclusively, we demonstrate that culture conditions for H. chejuensis using a bioreactor with various parameters and ethanol-based extraction procedures were optimized to mass-produce the marine bacterium-derived high purity prodigiosin associated with anti-cancer activity.
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Affiliation(s)
- Yu-jin Jeong
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Hyun Ju Kim
- Department of Systems Biotechnology, Chung-Ang University, Anseong 17546, Republic of Korea
| | - Suran Kim
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Seo-Young Park
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - HyeRan Kim
- Plant Systems Engineering Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea
| | - Sekyoo Jeong
- Research Division, Incospharm Corp., Daejeon 34036, Republic of Korea
| | - Sang Jun Lee
- Department of Systems Biotechnology, Chung-Ang University, Anseong 17546, Republic of Korea,
S.J. Lee Phone: +82-31-670-3356 E-mail:
| | - Moo-Seung Lee
- Environmental Diseases Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Republic of Korea,Department of Biomolecular Science, KRIBB School of Bioscience, Korea University of Science and Technology (UST), Daejeon 34113, Republic of Korea,Corresponding authors M.S. Lee Phone: +82-42-879-8292 E-mail:
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14
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Exploring the cause of the dual allosteric targeted inhibition attaching to allosteric sites enhancing SHP2 inhibition. Mol Divers 2021; 26:1567-1580. [PMID: 34338914 DOI: 10.1007/s11030-021-10286-4] [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: 03/30/2021] [Accepted: 07/22/2021] [Indexed: 10/20/2022]
Abstract
SHP2 is a protein tyrosine phosphatase (PTP) that can regulate the tyrosine phosphorylation level. Overexpression of SHP2 will promote the development of cancer diseases, so SHP2 has become one of the popular targets for the treatment of cancer. Studies have reported that both SHP099 and SHP844 are inhibitors of SHP2 and bind to different allosteric sites 1 and 2, respectively. Studies have shown that combining SHP099 with SHP844 will enhance pharmacological pathway inhibition in cells. This study uses molecular dynamic simulations to explore the dual allosteric targeted inhibition mechanism. The result shows that the residues THR108-TRP112 (allosteric site 1) move to LEU236-GLN245 (αB-αC link loop in PTP domain) , the residues of GLN79-GLN87 (allosteric site 2) get close to LEU262-GLN269 (αA-αB link loop in PTP domain) and HIS458-ARG465 (P-loop) come near to ARG501-THR507 (Q-loop) in SHP2-SHP099-SHP844 system, which makes the "inactive conformation" more stable and prevents the substrate from entering the catalytic site. Meanwhile, residue GLU110 (allosteric site 1), ARG265 (allosteric site 2), and ARG501 (Q-loop) are speculated to be the key residues that causing the SHP2 protein in auto-inhibition conformation. It is hoped that this study will provide clues for the development of the dual allosteric targeted inhibition of SHP2.
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15
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Haddix PL. Associations between cellular levels of ATP and prodigiosin pigment throughout the growth cycle of Serratia marcescens. Can J Microbiol 2021; 67:639-650. [PMID: 33844953 DOI: 10.1139/cjm-2020-0619] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Serratia marcescens is a prolific producer of the red, membrane-associated pigment prodigiosin. Earlier work has established both a positive role for prodigiosin in ATP production during the population lag phase and a negative role during high-rate, low cell density growth. This study uses the growth rate and growth phase modulation afforded by chemostat culture to extend prodigiosin functional analysis to the high-density and stationary phases. Cellular levels of prodigiosin were positively associated with cellular levels of ATP during high-density growth, and artificial pigment induction during this phase increased cellular ATP levels. Following peak high-density ATP per cell, the early stationary phase enabled significant population growth, while prodigiosin levels remained high and ATP declined. During the late stationary phase, ATP per cell was positively associated with prodigiosin per cell, while both declined during continued growth. These results provide correlational evidence for the multiple effects of prodigiosin pigment on ATP production throughout the growth cycle. Earlier work and the data presented here enable the formulation of a working model for the oscillating relationships between cellular levels of ATP and prodigiosin during batch culture.
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Affiliation(s)
- Pryce L Haddix
- Department of Biology, Auburn University at Montgomery, P.O. Box 244023, Montgomery, AL 36124-4023 USA.,Department of Biology, Auburn University at Montgomery, P.O. Box 244023, Montgomery, AL 36124-4023 USA
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Choi SY, Lim S, Yoon KH, Lee JI, Mitchell RJ. Biotechnological Activities and Applications of Bacterial Pigments Violacein and Prodigiosin. J Biol Eng 2021; 15:10. [PMID: 33706806 PMCID: PMC7948353 DOI: 10.1186/s13036-021-00262-9] [Citation(s) in RCA: 30] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Accepted: 03/03/2021] [Indexed: 12/14/2022] Open
Abstract
In this review, we discuss violacein and prodigiosin, two chromogenic bacterial secondary metabolites that have diverse biological activities. Although both compounds were "discovered" more than seven decades ago, interest into their biological applications has grown in the last two decades, particularly driven by their antimicrobial and anticancer properties. These topics will be discussed in the first half of this review. The latter half delves into the current efforts of groups to produce these two compounds. This includes in both their native bacterial hosts and heterogeneously in other bacterial hosts, including discussing some of the caveats related to the yields reported in the literature, and some of the synthetic biology techniques employed in this pursuit.
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Affiliation(s)
- Seong Yeol Choi
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Sungbin Lim
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea
| | - Kyoung-Hye Yoon
- Department of Physiology, Mitohormesis Research Center, Yonsei University Wonju College of Medicine, Wonju, Gangwon-do, South Korea.
| | - Jin I Lee
- Division of Biological Science and Technology, College of Science and Technology, Yonsei University, Mirae Campus, Wonju, Gangwon-do, South Korea.
| | - Robert J Mitchell
- School of Life Sciences, Ulsan National Institute of Science and Technology (UNIST), Ulsan, 44919, South Korea.
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Berning L, Schlütermann D, Friedrich A, Berleth N, Sun Y, Wu W, Mendiburo MJ, Deitersen J, Brass HUC, Skowron MA, Hoffmann MJ, Niegisch G, Pietruszka J, Stork B. Prodigiosin Sensitizes Sensitive and Resistant Urothelial Carcinoma Cells to Cisplatin Treatment. Molecules 2021; 26:1294. [PMID: 33673611 PMCID: PMC7957586 DOI: 10.3390/molecules26051294] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Revised: 02/12/2021] [Accepted: 02/22/2021] [Indexed: 01/21/2023] Open
Abstract
Cisplatin-based treatment is the standard of care therapy for urothelial carcinomas. However, complex cisplatin resistance mechanisms limit the success of this approach. Both apoptosis and autophagy have been shown to contribute to this resistance. Prodigiosin, a secondary metabolite from various bacteria, exerts different biological activities including the modulation of these two cellular stress response pathways. We analyzed the effect of prodigiosin on protein levels of different autophagy- and apoptosis-related proteins in cisplatin-sensitive and -resistant urothelial carcinoma cells (UCCs). Furthermore, we investigated the effect on cell viability of prodigiosin alone or in combination with cisplatin. We made use of four different pairs of cisplatin-sensitive and -resistant UCCs. We found that prodigiosin blocked autophagy in UCCs and re-sensitized cisplatin-resistant cells to apoptotic cell death. Furthermore, we found that prodigiosin is a potent anticancer agent with nanomolar IC50 values in all tested UCCs. In combination studies, we observed that prodigiosin sensitized both cisplatin-sensitive and -resistant urothelial carcinoma cell lines to cisplatin treatment with synergistic effects in most tested cell lines. These effects of prodigiosin are at least partially mediated by altering lysosomal function, since we detected reduced activities of cathepsin B and L. We propose that prodigiosin is a promising candidate for the therapy of cisplatin-resistant urothelial carcinomas, either as a single agent or in combinatory therapeutic approaches.
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Affiliation(s)
- Lena Berning
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - David Schlütermann
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - Annabelle Friedrich
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - Niklas Berleth
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - Yadong Sun
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - Wenxian Wu
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - María José Mendiburo
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - Jana Deitersen
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
| | - Hannah U. C. Brass
- Institute of Bioorganic Chemistry, Faculty of Mathematics and Natural Sciences, Heinrich Heine University, Forschungszentrum Jülich, Stetternicher Forst, 52428 Jülich, Germany; (H.U.C.B.); (J.P.)
- Institute for Bio- and Geosciences 1: Bioorganic Chemistry (IBG-1), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Margaretha A. Skowron
- Department of Urology, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (M.A.S.); (M.J.H.); (G.N.)
| | - Michèle J. Hoffmann
- Department of Urology, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (M.A.S.); (M.J.H.); (G.N.)
| | - Günter Niegisch
- Department of Urology, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (M.A.S.); (M.J.H.); (G.N.)
| | - Jörg Pietruszka
- Institute of Bioorganic Chemistry, Faculty of Mathematics and Natural Sciences, Heinrich Heine University, Forschungszentrum Jülich, Stetternicher Forst, 52428 Jülich, Germany; (H.U.C.B.); (J.P.)
- Institute for Bio- and Geosciences 1: Bioorganic Chemistry (IBG-1), Forschungszentrum Jülich GmbH, 52428 Jülich, Germany
| | - Björn Stork
- Institute of Molecular Medicine I, Medical Faculty, Heinrich Heine University, 40225 Düsseldorf, Germany; (L.B.); (D.S.); (A.F.); (N.B.); (Y.S.); (W.W.); (M.J.M.); (J.D.)
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18
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Mattingly AE, Cox KE, Smith R, Melander RJ, Ernst RK, Melander C. Screening an Established Natural Product Library Identifies Secondary Metabolites That Potentiate Conventional Antibiotics. ACS Infect Dis 2020; 6:2629-2640. [PMID: 32810395 DOI: 10.1021/acsinfecdis.0c00259] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Health organizations worldwide have warned that we are on the cusp of a "post-antibiotic era," necessitating new approaches to combat antibiotic resistant infections. One such approach is the development of antibiotic adjuvants, which have little or no inherent antibiotic activity at their active concentrations but instead potentiate the activity of antibiotics against antibiotic-resistant bacteria. Recently, we demonstrated that meridianin D, a natural product originally reported to have activity against Staphylococcus aureus and Mycobacterium tuberculosis, possesses the ability to reverse colistin resistance in colistin resistant bacteria. As most natural product screens typically involve screening for only certain activities (anticancer, antiviral, and antimicrobial are typical), we posited that the meridianin D discovery was not unique and there are potentially many natural products that have adjuvant activity. To explore this, the National Cancer Institute (NCI) Natural Product Library Set IV was screened for adjuvant activity using four classes of antibiotics (β-lactams, aminoglycosides, macrolides, and polymyxins) against three bacterial pathogens (methicillin-resistant Staphylococcus aureus (MRSA), Acinetobacter baumannii, and Klebsiella pneumoniae). Sixteen compounds suppressed β-lactam resistance in MRSA, five of which effected a 16-fold reduction in the oxacillin minimum inhibitory concentration (MIC). Two natural products effectively suppressed aminoglycoside resistance in both of the Gram-negative species tested, and no hits were observed with macrolides. In contrast, a larger number of natural product adjuvants were identified when screening against colistin-resistant strains of A. baumannii and K. pneumoniae. Nine compounds reduced the colistin MIC to its breakpoint or lower (up to a 1024-fold reduction). Clorobiocin, novobiocin, and prodigiosin were most effective, reducing the colistin MIC in K. pneumoniae strain B9 to 2 μg/mL at concentrations as low as 0.625, 2.5, and 1.25 μM, respectively. Restored sensitivity to colistin with these compounds does not appear to coincide with known mechanisms of colistin resistance.
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Affiliation(s)
- Anne E. Mattingly
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Karlie E. Cox
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Richard Smith
- Department of Microbial Pathogenesis, University of Maryland-Baltimore, Baltimore, Maryland 21201, United States
| | - Roberta J. Melander
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
| | - Robert K. Ernst
- Department of Microbial Pathogenesis, University of Maryland-Baltimore, Baltimore, Maryland 21201, United States
| | - Christian Melander
- Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United States
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