1
|
Abed S, Sholeh M, Khazani Asforooshani M, Shafiei M, Hashemi Shahraki A, Nasr S. Insights into the novel Enterococcus faecalis phage: A comprehensive genome analysis. PLoS One 2024; 19:e0301292. [PMID: 38743671 PMCID: PMC11093359 DOI: 10.1371/journal.pone.0301292] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Accepted: 03/12/2024] [Indexed: 05/16/2024] Open
Abstract
Enterococcus faecalis, a Gram-positive bacterium, poses a significant clinical challenge owing to its intrinsic resistance to a broad spectrum of antibiotics, warranting urgent exploration of innovative therapeutic strategies. This study investigated the viability of phage therapy as an alternative intervention for antibiotic-resistant E. faecalis, with a specific emphasis on the comprehensive genomic analysis of bacteriophage SAM-E.f 12. The investigation involved whole-genome sequencing of SAM-E.f 12 using Illumina technology, resulting in a robust dataset for detailed genomic characterization. Bioinformatics analyses were employed to predict genes and assign functional annotations. The bacteriophage SAM-E.f 12, which belongs to the Siphoviridae family, exhibited substantial potential, with a burst size of 5.7 PFU/infected cells and a latent period of 20 min. Host range determination experiments demonstrated its effectiveness against clinical E. faecalis strains, positioning SAM-E.f 12 as a precise therapeutic agent. Stability assays underscore resilience across diverse environmental conditions. This study provides a comprehensive understanding of SAM-E.f 12 genomic composition, lytic lifecycle parameters, and practical applications, particularly its efficacy in murine wound models. These results emphasize the promising role of phage therapy, specifically its targeted approach against antibiotic-resistant E. faecalis strains. The nuanced insights derived from this research will contribute to the ongoing pursuit of efficacious phage therapies and offer valuable implications for addressing the clinical challenges associated with E. faecalis infections.
Collapse
Affiliation(s)
- Sahar Abed
- Department of Microbial Biotechnology, Faculty of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Mohammad Sholeh
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | | | - Morvarid Shafiei
- Department of Bacteriology, Pasteur Institute of Iran, Tehran, Iran
| | - Abdolrazagh Hashemi Shahraki
- Division of Pulmonary, Critical Care and Sleep, College of Medicine-Jacksonville, University of Florida, Gainesville, Florida, United States of America
| | - Shaghayegh Nasr
- Department of Microbial Biotechnology, Faculty of Basic Sciences and Advanced Technologies in Biology, University of Science and Culture, Tehran, Iran
- Microorganisms Bank, Iranian Biological Resource Center (IBRC), ACECR, Tehran, Iran
| |
Collapse
|
2
|
Li X, Cai Y, Xia Q, Liao Y, Qin R. Antibacterial sensitizers from natural plants: A powerful weapon against methicillin-resistant Staphylococcus aureus. Front Pharmacol 2023; 14:1118793. [PMID: 36909155 PMCID: PMC9998539 DOI: 10.3389/fphar.2023.1118793] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 02/13/2023] [Indexed: 02/26/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a drug-resistant bacterium that can cause a range of infections with high morbidity and mortality, including pneumonia, etc. Therefore, development of new drugs or therapeutic strategies against MRSA is urgently needed. Increasing evidence has shown that combining antibiotics with "antibacterial sensitizers" which itself has no effect on MRSA, is highly effective against MRSA. Many studies showed the development of antibacterial sensitizers from natural plants may be a promising strategy against MRSA because of their low side effects, low toxicity and multi-acting target. In our paper, we first reviewed the resistance mechanisms of MRSA including "Resistance to Beta-Lactams", "Resistance to Glycopeptide antibiotics", "Resistance to Macrolides, Aminoglycosides, and Oxazolidinones" etc. Moreover, we summarized the possible targets for antibacterial sensitizers against MRSA. Furthermore, we reviewed the synergy effects of active monomeric compounds from natural plants combined with antibiotics against MRSA and their corresponding mechanisms over the last two decades. This review provides a novel approach to overcome antibiotic resistance in MRSA.
Collapse
Affiliation(s)
- Xiaoli Li
- Department of Pharmacology, College of Pharmacy, Chongqing Medical University, Chongqing, China.,Chongqing Key Laboratory of Drug Metabolism, Chongqing, China
| | - Yongqing Cai
- Department of Pharmacy, Daping Hospital, Army Medical University, Chongqing, China
| | - Qinchuan Xia
- Fuan Pharmaceutical Group Chongqing Bosen Pharmaceutical Co., Ltd., Chongqing, China
| | - Yongqun Liao
- Fuan Pharmaceutical Group Chongqing Bosen Pharmaceutical Co., Ltd., Chongqing, China
| | - Rongxin Qin
- Department of Pharmacology, College of Pharmacy, Army Medical University (The Third Military Medical University), Chongqing, China
| |
Collapse
|
3
|
Schneider YK, Hagestad OC, Li C, Hansen EH, Andersen JH. Selective isolation of Arctic marine actinobacteria and a down-scaled fermentation and extraction strategy for identifying bioactive compounds. Front Microbiol 2022; 13:1005625. [DOI: 10.3389/fmicb.2022.1005625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Accepted: 10/21/2022] [Indexed: 11/22/2022] Open
Abstract
Actinobacteria are among the most prolific producers of bioactive secondary metabolites. In order to collect Arctic marine bacteria for the discovery of new bioactive metabolites, actinobacteria were selectively isolated during a research cruise in the Greenland Sea, Norwegian Sea and the Barents Sea. In the frame of the isolation campaign, it was investigated how different sample treatments, isolation media and sample-sources, such as animals and sediments, affected the yield of actinobacterial isolates to aid further isolation campaigns. Special attention was given to sediments, where we expected spores of spore forming bacteria to enrich. Beside actinobacteria a high share of bacilli was obtained which was not desired. An experimental protocol for down-scaled cultivation and extraction was tested and compared with an established low-throughput cultivation and extraction protocol. The heat-shock method proved suitable to enrich spore-, or endospore forming bacteria such as bacilli. Finally, a group bioactive compounds could be tentatively identified using UHPLC–MS/MS analysis of the active fractions.
Collapse
|
4
|
Nugroho A, Harahap IA, Ardiansyah A, Bayu A, Rasyid A, Murniasih T, Setyastuti A, Putra MY. Antioxidant and antibacterial activities in 21 species of Indonesian sea cucumbers. JOURNAL OF FOOD SCIENCE AND TECHNOLOGY 2022; 59:239-248. [PMID: 35068568 PMCID: PMC8758811 DOI: 10.1007/s13197-021-05007-6] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Revised: 01/11/2021] [Accepted: 01/26/2021] [Indexed: 01/03/2023]
Abstract
Sea cucumbers are marine organisms with uses in food, cosmetics, and medicine. This study aimed to identify Indonesian sea cucumbers with high antioxidant and antibacterial activities. Twenty-one sea cucumber species were used for this study. Antioxidant capacity was evaluated using the 2,2-diphenyl-β-picrylhydrazine assay. Antibacterial activity was assessed using the disk diffusion assay, whereas the resazurin-based assay was employed to determine the minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC). Volatile compounds possibly related to the biological activity of sea cucumbers were analyzed via gas chromatography-mass spectrometry (GC-MS). Holothuria atra had the strongest antioxidant capacity (IC50 = 14.22 ± 0.87 µg µL-1). Stichopus vastus displayed the best antibacterial activity against Staphylococcus aureus, whereas Stichopus ocellatus extract was most potent against Vibrio cholerae. Holothuria albiventer, which controlled Bacillus subtilis most effectively while also being active against S. aureus and V. cholerae, was the optimal antimicrobial species. H. albiventer and Actinopyga echinites inhibited B. subtilis growth at 12.5 µg µL-1. The MBC tests indicated that the antibacterial activities of sea cucumbers at the MIC were bacteriostatic, rather than bactericidal, in nature. GC-MS analysis uncovered long-chain fatty acids that might be associated with the antibacterial activities of sea cucumbers.
Collapse
Affiliation(s)
- Aji Nugroho
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
- Center for National Marine Protected Area (BKKPN) Kupang, Ministry of Marine Affairs & Fisheries, Jl. Yos Sudarso Bolok Direction, Alak, Kupang, Nusa Tenggara Timur 85231 Indonesia
| | - Iskandar Azmy Harahap
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
| | - Ardi Ardiansyah
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
| | - Asep Bayu
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
| | - Abdullah Rasyid
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
| | - Tutik Murniasih
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
| | - Ana Setyastuti
- Research Center for Oceanography, Indonesian Institute of Sciences, Jl. Pasir Putih I, Ancol Timur, Jakarta, 14430 Indonesia
| | - Masteria Yunovilsa Putra
- Research Center for Biotechnology, Indonesian Institute of Sciences, Jl. Raya Jakarta-Bogor No. Km 46, Cibinong, Bogor, Jawa Barat 16911 Indonesia
| |
Collapse
|
5
|
Vandamme EJ. Professor Arnold L. (Arny) Demain's historical position in the rise of industrial microbiology and biotechnology. J Ind Microbiol Biotechnol 2021; 48:kuab034. [PMID: 34113991 PMCID: PMC8788709 DOI: 10.1093/jimb/kuab034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Accepted: 05/19/2021] [Indexed: 11/15/2022]
Abstract
This perspective text focuses on the pivotal role and historical position that the late Prof. Arnold L. (Arny) Demain has taken since the 1950s in the rise and impact of the field of industrial microbiology and biotechnology. His drive toward academic research with industrial potential-first at Merck & Co. and later at MIT-, his feeling for establishing cordial personal contacts with his students and postdocs (Arny's Army) and his ability for worldwide networking are outlined here, intertwined with the author's personal experiences and impressions. His scientific output is legendary as to research papers, comprehensive reviews, books, and lectures at conferences worldwide. Some of his research experiences in industry and academia are mentioned in a historical context as well as his relentless efforts to advocate the importance and impact of industrial microbiology and biotechnology as an essential green technology for our planet Earth.
Collapse
Affiliation(s)
- Erick J Vandamme
- Department of Biotechnology, Centre for Industrial Biotechnology and Synthetic Biology, Faculty of Bioscience Engineering, Ghent University, Ghent, Belgium
| |
Collapse
|
6
|
Watters KE, Kirkpatrick J, Palmer MJ, Koblentz GD. The CRISPR revolution and its potential impact on global health security. Pathog Glob Health 2021; 115:80-92. [PMID: 33590814 PMCID: PMC8550201 DOI: 10.1080/20477724.2021.1880202] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
Global health security is constantly under threat from infectious diseases. Despite advances in biotechnology that have improved diagnosis and treatment of such diseases, delays in detecting outbreaks and the lack of countermeasures for some biological agents continue to pose severe challenges to global health security. In this review, we describe some of the challenges facing global health security and how genome editing technologies can help overcome them. We provide specific examples of how the genome-editing tool CRISPR is being used to develop new tools to characterize pathogenic agents, diagnose infectious disease, and develop vaccines and therapeutics to mitigate the effects of an outbreak. The article also discusses some of the challenges associated with genome-editing technologies and the efforts that scientists are undertaking to mitigate them. Overall, CRISPR and genome-editing technologies are poised to have a significant positive influence on global health security over the years to come.
Collapse
Affiliation(s)
- Kyle E Watters
- Department of Molecular and Cell Biology, University of California Berkeley, Berkeley, CA, USA
| | - Jesse Kirkpatrick
- Institute for Philosophy and Public Policy, George Mason University, Fairfax, VA, USA
| | - Megan J Palmer
- Department of Bioengineering, Stanford University, Stanford, CA, USAs
| | - Gregory D Koblentz
- Schar School of Policy and Government, George Mason University, Fairfax, VA, USA
| |
Collapse
|
7
|
Depoorter E, De Canck E, Coenye T, Vandamme P. Burkholderia Bacteria Produce Multiple Potentially Novel Molecules that Inhibit Carbapenem-Resistant Gram-Negative Bacterial Pathogens. Antibiotics (Basel) 2021; 10:antibiotics10020147. [PMID: 33540653 PMCID: PMC7912996 DOI: 10.3390/antibiotics10020147] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2021] [Revised: 01/27/2021] [Accepted: 01/29/2021] [Indexed: 01/12/2023] Open
Abstract
Antimicrobial resistance in Gram-negative pathogens represents a global threat to human health. This study determines the antimicrobial potential of a taxonomically and geographically diverse collection of 263 Burkholderia (sensu lato) isolates and applies natural product dereplication strategies to identify potentially novel molecules. Antimicrobial activity is almost exclusively present in Burkholderia sensu stricto bacteria and rarely observed in the novel genera Paraburkholderia, Caballeronia, Robbsia, Trinickia, and Mycetohabitans. Fourteen isolates show a unique spectrum of antimicrobial activity and inhibited carbapenem-resistant Gram-negative bacterial pathogens. Dereplication of the molecules present in crude spent agar extracts identifies 42 specialized metabolites, 19 of which represented potentially novel molecules. The known identified Burkholderia metabolites include toxoflavin, reumycin, pyrrolnitrin, enacyloxin, bactobolin, cepacidin, ditropolonyl sulfide, and antibiotics BN-227-F and SF 2420B, as well as the siderophores ornibactin, pyochelin, and cepabactin. Following semipreparative fractionation and activity testing, a total of five potentially novel molecules are detected in active fractions. Given the molecular formula and UV spectrum, two of those putative novel molecules are likely related to bactobolins, and another is likely related to enacyloxins. The results from this study confirm and extend the observation that Burkholderia bacteria present exciting opportunities for the discovery of potentially novel bioactive molecules.
Collapse
Affiliation(s)
- Eliza Depoorter
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, 9000 Ghent, Belgium; (E.D.); (E.D.C.)
| | - Evelien De Canck
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, 9000 Ghent, Belgium; (E.D.); (E.D.C.)
| | - Tom Coenye
- Laboratory of Pharmaceutical Microbiology, Department of Pharmaceutical Analysis, Ghent University, 9000 Ghent, Belgium;
| | - Peter Vandamme
- Laboratory of Microbiology, Department of Biochemistry and Microbiology, Ghent University, 9000 Ghent, Belgium; (E.D.); (E.D.C.)
- Correspondence: ; Tel.: +32-9264-5113
| |
Collapse
|
8
|
Kumar HSS, Kumar SR, Kumar NN, Ajith S. Molecular docking studies of gyrase inhibitors: weighing earlier screening bedrock. In Silico Pharmacol 2021; 9:2. [PMID: 33442529 DOI: 10.1007/s40203-020-00064-9] [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] [Received: 07/21/2020] [Accepted: 11/26/2020] [Indexed: 12/14/2022] Open
Abstract
For any antimicrobial assay, a standard drug is used to compare the bactericidal efficiency of the bioactive compound under screening. The standard drugs have different targets that may be intracellular or membrane located. The location of the target is believed to be determining the bioactivity of the drug depending on the drug's access to its target. Therefore, different drugs must have a different magnitude in exhibiting the biological effect. However, in most of the published literature about the screening of bioactive compounds on antimicrobial activity, generally, the standard drug is randomly chosen while comparing against the bioactive compound of interest. Further, the antimicrobial activity is inferred by comparing the randomly chosen standard drugs without knowing the physicochemical parameters of the standard drug and the test molecule. It is just like an unfair comparison of the impact of a bullet with the impact of an explosive in a combat scene. Computer-based strategies for structure-based drug discovery presents a valuable alternative to the costly and time-consuming process of random screening. The docking studies provide better insights into the binding mechanism of substrate and inhibitor at the molecular level. The evaluation of such a comparison of bioactive compounds against randomly selected standard drugs through a customized virtual screening pipeline showed 57% false positives, 18% true positive, 17% true negative, 8% false-negative results. This study directs for mandatory cheminformatics-based assessment of the bioactive compounds before choosing the standard drug to compare with. Supplementary Information The online version contains supplementary material available at 10.1007/s40203-020-00064-9.
Collapse
Affiliation(s)
- H S Santosh Kumar
- Department of Biotechnology and Bioinformatics, Bioscience Complex, Kuvempu University, Jnana Sahyadri, Shankaraghatta, 577451 India
| | - S Ravi Kumar
- Department of Biotechnology and Bioinformatics, Bioscience Complex, Kuvempu University, Jnana Sahyadri, Shankaraghatta, 577451 India
| | - N Naveen Kumar
- Department of Biotechnology and Bioinformatics, Bioscience Complex, Kuvempu University, Jnana Sahyadri, Shankaraghatta, 577451 India
| | - S Ajith
- Department of Biotechnology and Bioinformatics, Bioscience Complex, Kuvempu University, Jnana Sahyadri, Shankaraghatta, 577451 India
| |
Collapse
|
9
|
CxxC Zinc Finger Protein Derived Peptide, MF18 Functions Against Biofilm Formation. Protein J 2020; 39:337-349. [PMID: 32621273 DOI: 10.1007/s10930-020-09904-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
Abstract
The major threat in modern medicine was biofilm forming bacterial related infections and they were highly tolerant to conventional antibiotics and a boundless demand for new drugs. In this regard, antimicrobial peptide (AMP) have been considered as potential alternative agents to conventional antibiotics. In this study, we have reported a CxxC zinc finger protein derived peptide, MF18 and its various biological role including activity against biofilm forming bacteria. Zinc finger protein are important in regulation of several cellular processes and wide range of molecular functions. The CxxC zinc finger protein identified from the cDNA library of a teleost fish; further it was characterised using various online bioinformatics programs. During the in-silico analysis, an AMP named MF18 was identified from the CxxC zinc finger protein, then it was synthesised for further biological activity studies. The antimicrobial activity of MF18 was confirmed against the biofilm clinical isolates such as Staphylococcus aureus and Escherichia coli. The MIC of the antimicrobial peptide at the concentration of 320 µM was observed against these two biofilm bacteria. The mechanism of the peptides was determined using bacteria on its membrane permeabilization ability by scanning electron microscopy. It is exhibited that the MF18 potentially influenced in damaging the morphology of the bacteria. The toxicity of MF18 against the continuous cell line (RAW 264.7) was demonstrated by MTT assay and also using peripheral red blood cells by haemolytic assay; both assays showed that the peptide have no toxicity on the cells at lower concentration. Overall, the study showed the potential therapeutic application of the peptide in pharma industry.
Collapse
|
10
|
Sánchez S, Demain AL. Editorial overview: Anti-infectives 2019 volume. Curr Opin Pharmacol 2019; 48:iii-vi. [PMID: 31540784 DOI: 10.1016/j.coph.2019.08.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Affiliation(s)
- Sergio Sánchez
- Charles A. Dana Research Institute for Scientists Emeriti of Drew University, Madison, NJ, United States.
| | | |
Collapse
|
11
|
Bindiya ES, Tina KJ, Sasidharan RS, Bhat SG. BaCf3: highly thermostable bacteriocin from Bacillus amyloliquefaciens BTSS3 antagonistic on food-borne pathogens. 3 Biotech 2019; 9:136. [PMID: 30863715 DOI: 10.1007/s13205-019-1639-2] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 02/17/2019] [Indexed: 11/25/2022] Open
Abstract
In the present study, we characterized bacteriocin BaCf3, isolated and purified from Bacillus amyloliquefaciens BTSS3, and demonstrated its inhibitory potential on growth and biofilm formation of certain food spoilage bacteria and pathogens. Purification was by gel filtration chromatography and its molecular weight was 3028.422 Da after MALDI-TOF MS. The bacteriocin was highly thermostable withstanding even autoclaving conditions and pH tolerant (2.0-13.0). The bacteriocin was sensitive to oxidizing agent (DMSO) and reducing agent (DTT). The de novo sequence of the bacteriocin BaCf3 was identified and was found to be novel. The sequence analysis shows the presence of a disulphide linkage between C6 and C13. The microtitre plate assay proved that BaCf3 could reduce up to 80% biofilm produced by strong biofilm producers from food samples. In addition, BaCf3 did not show cytotoxicity on 3-TL3 cell line.
Collapse
Affiliation(s)
- E S Bindiya
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682 022 India
| | - K J Tina
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682 022 India
| | - Raghul Subin Sasidharan
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682 022 India
| | - Sarita G Bhat
- Department of Biotechnology, Cochin University of Science and Technology, Cochin, 682 022 India
| |
Collapse
|
12
|
de Alteriis E, Maselli V, Falanga A, Galdiero S, Di Lella FM, Gesuele R, Guida M, Galdiero E. Efficiency of gold nanoparticles coated with the antimicrobial peptide indolicidin against biofilm formation and development of Candida spp. clinical isolates. Infect Drug Resist 2018; 11:915-925. [PMID: 30013374 PMCID: PMC6037145 DOI: 10.2147/idr.s164262] [Citation(s) in RCA: 54] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND This article examines the use of a novel nano-system, gold nanoparticles coated with indolicidin (AuNPs-indolicidin), against pathogenic Candida albicans biofilms. Candida species cause frequent infections owing to their ability to form biofilms, primarily on implant devices. MATERIALS AND METHODS We used an integrated approach, evaluating the effect of AuNPs-indolicidin on prevention and eradication of Candida biofilms formed in multi-well polystyrene plates, with relative gene expression assays. Four biofilm-associated genes (FG1, HWP1, ALS1 and ALS3, and CDR1 and CDR2) involved in efflux pump were analyzed using reverse transcription polymerase chain reaction. RESULTS Treatment with the nano-complex significantly inhibits the capacity of C. albicans to form biofilms and impairs preformed mature biofilms. Treatment with AuNPs-indolicidin results in an increase in the kinetics of Rhodamine 6G efflux and a reduction in the expression of biofilm-related genes. CONCLUSION These data provide a chance to develop novel therapies against nosocomially acquired refractory C. albicans biofilms.
Collapse
Affiliation(s)
| | - Valeria Maselli
- Department of Biology, University of Naples "Federico II", Naples, Italy,
| | - Annarita Falanga
- Department of Pharmacy, University of Naples "Federico II", Naples, Italy
| | - Stefania Galdiero
- Department of Pharmacy, University of Naples "Federico II", Naples, Italy
| | - Federica Maria Di Lella
- Section of Microbiology and Virology, University Hospital "Luigi Vanvitelli" of Naples, Naples, Italy
| | - Renato Gesuele
- Department of Biology, University of Naples "Federico II", Naples, Italy,
| | - Marco Guida
- Department of Biology, University of Naples "Federico II", Naples, Italy,
| | - Emilia Galdiero
- Department of Biology, University of Naples "Federico II", Naples, Italy,
| |
Collapse
|
13
|
Danilovich ME, Sánchez LA, Acosta F, Delgado OD. Antarctic bioprospecting: in pursuit of microorganisms producing new antimicrobials and enzymes. Polar Biol 2018. [DOI: 10.1007/s00300-018-2295-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
|
14
|
In-vitro assessment of antimicrobial properties and lymphocytotoxicity assay of benzoisochromanequinones polyketide from Streptomyces sp JRG-04. Microb Pathog 2017; 110:117-127. [DOI: 10.1016/j.micpath.2017.06.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2017] [Revised: 05/11/2017] [Accepted: 06/22/2017] [Indexed: 11/21/2022]
|
15
|
Jose PA, Jha B. Intertidal marine sediment harbours Actinobacteria with promising bioactive and biosynthetic potential. Sci Rep 2017; 7:10041. [PMID: 28855551 PMCID: PMC5577230 DOI: 10.1038/s41598-017-09672-6] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2016] [Accepted: 07/28/2017] [Indexed: 11/29/2022] Open
Abstract
Actinobacteria are the major source of bioactive natural products that find their value in research and drug discovery programmes. Antimicrobial resistance and the resulting high demand for novel antibiotics underscore the need for exploring novel sources of these bacteria endowed with biosynthetic potential. Intertidal ecosystems endure regular periods of immersion and emersion, and represent an untapped source of Actinobacteria. In this study, we studied the diversity and biosynthetic potential of cultivable Actinobacteria from intertidal sediments of Diu Island in the Arabian Sea. A total of 148 Actinobacteria were selectively isolated using a stamping method with eight isolation media. Isolates were grouped into OTUs based on their 16S rRNA gene sequence, and categorized within actinobacterial families such as Glycomycetaceae, Micromonosporaceae, Nocardiaceae, Nocardiopsaceae, Pseudonocardiaceae, Streptomycetaceae, and Thermomonosporaceae. The biosynthetic potential of the Actinobacteria, necessary for secondary metabolite biosynthesis, was screened and confirmed by extensive fingerprinting approaches based on genes coding for polyketide synthases and nonribosomal peptide synthetases. The observed biosynthetic potential was correlated with the antibacterial activity exhibited by these isolates in laboratory conditions. Ultimately, the results demonstrate that intertidal sediment is a rich source of diverse cultivable Actinobacteria with high potential to synthesize novel bioactive compounds in their genomes.
Collapse
Affiliation(s)
- Polpass Arul Jose
- Marine Biotechnology and Ecology Division, CSIR- Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar - 364002, Gujarat, India.
| | - Bhavanath Jha
- Marine Biotechnology and Ecology Division, CSIR- Central Salt and Marine Chemicals Research Institute, G. B. Marg, Bhavnagar - 364002, Gujarat, India. .,Academy of Scientific and Innovative Research (AcSIR), Council of Scientific and Industrial Research (CSIR), New Delhi, India.
| |
Collapse
|
16
|
Xing LW, Tian SX, Gao W, Yang N, Qu P, Liu D, Jiao J, Wang J, Feng XJ. Recombinant expression and biological characterization of the antimicrobial peptide fowlicidin-2 in Pichia pastoris. Exp Ther Med 2016; 12:2324-2330. [PMID: 27698732 DOI: 10.3892/etm.2016.3578] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Accepted: 07/05/2016] [Indexed: 12/21/2022] Open
Abstract
Fowlicidins are a group of cathelicidin antimicrobial peptides that were initially identified in chickens. Fowlicidin-2, which is composed of 31 amino acids, is widely expressed in the majority of tissues in chickens and has an important role in innate immunity. In the present study, a recombinant expression system for fowlicidin-2 was successfully constructed using Pichia pastoris X-33 and the expression vector pPICZα-A. Under the optimized fermentation conditions, 85.6 mg fowlicidin-2 with >95% purity was obtained from 1 liter culture medium following purification by ion exchange chromatography and reversed phase high performance liquid chromatography. The recombinant fowlicidin-2 exhibited broad spectrum antimicrobial activity and had a minimum inhibitory concentration ranging from 1 to 4 µM. Furthermore, recombinant fowlicidin-2 exhibited hemolytic activity, promoting 50% human erythrocyte hemolysis in the concentration range of 128-256 µM, and anticancer activity, resulting in the death of 50% of A375 human malignant melanoma cells in the concentration range of 2-4 µM. The results of the present study suggest that recombinant fowlicidin-2 may be a promising candidate for therapeutic applications.
Collapse
Affiliation(s)
- Li-Wei Xing
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Shi-Xun Tian
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Wei Gao
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Na Yang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Pei Qu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Di Liu
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Jian Jiao
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Jue Wang
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| | - Xing-Jun Feng
- Department of Animal Nutrition and Feed Science, College of Animal Science and Technology, Northeast Agricultural University, Harbin, Heilongjiang 150030, P.R. China
| |
Collapse
|
17
|
Biogenesis of antibiotics-viewing its history and glimpses of the future. Folia Microbiol (Praha) 2016; 61:347-58. [PMID: 27188629 DOI: 10.1007/s12223-016-0462-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Accepted: 05/02/2016] [Indexed: 01/07/2023]
Abstract
This review aims at comparing some historical data with the current situation in the study of biogenesis of natural compounds, antibiotics in the first place. Biogenesis of tetracyclines and cycloheximide and related compounds serves as example. Examples of molecular biological and bioinformatics methods used in the study of antibiotic biogenesis are described both in terms of its historical aspects and the current knowledge.
Collapse
|
18
|
Shi J, Pan J, Liu L, Yang D, Lu S, Zhu X, Shen B, Duan Y, Huang Y. Titer improvement and pilot-scale production of platensimycin from Streptomyces platensis SB12026. J Ind Microbiol Biotechnol 2016; 43:1027-35. [PMID: 27126098 DOI: 10.1007/s10295-016-1769-z] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 03/28/2016] [Indexed: 11/25/2022]
Abstract
Platensimycin (PTM) and platencin (PTN), isolated from several strains of Streptomyces platensis are potent antibiotics against multi-drug resistant bacteria. PTM was also shown to have antidiabetic and antisteatotic activities in mouse models. Through a novel genome-mining method, we have recently identified six PTM and PTN dual-producing strains, and generated several mutants with improved production of PTM or PTN by inactivating the pathway-specific transcriptional repressor gene ptmR1. Among them, S. platensis SB12026 gave the highest titer of 310 mg/L for PTM. In this study, we now report titer improvement by medium and fermentation optimization and pilot-scale production and isolation of PTM from SB12026. The fermentation medium optimization was achieved by manipulating the carbon and nitrogen sources, as well as the inorganic salts. The highest titer of 1560 mg/L PTM was obtained in 15-L fermentors, using a formulated medium mainly containing soluble starch, soybean flour, morpholinepropanesulfonic acid sodium salt and CaCO3. In addition, a polyamide chromatographic step was applied to facilitate the purification and 45.14 g of PTM was successfully obtained from a 60 L scale fermentation. These results would speed up the future development of PTM as human medicine.
Collapse
Affiliation(s)
- Jun Shi
- Xiangya International Academy of Translational Medicine, Central South University, Tongzipo Road, #172, Yuelu District, Changsha, 410013, Hunan, China
| | - Jian Pan
- Xiangya International Academy of Translational Medicine, Central South University, Tongzipo Road, #172, Yuelu District, Changsha, 410013, Hunan, China
| | - Ling Liu
- Xiangya International Academy of Translational Medicine, Central South University, Tongzipo Road, #172, Yuelu District, Changsha, 410013, Hunan, China
| | - Dong Yang
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Songquan Lu
- Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, 410013, Hunan, China
| | - Xiangcheng Zhu
- Xiangya International Academy of Translational Medicine, Central South University, Tongzipo Road, #172, Yuelu District, Changsha, 410013, Hunan, China.,Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, 410013, Hunan, China
| | - Ben Shen
- Department of Chemistry, The Scripps Research Institute, Jupiter, FL, 33458, USA.,Department of Molecular Therapeutics, The Scripps Research Institute, Jupiter, FL, 33458, USA.,Natural Products Library Initiative, The Scripps Research Institute, Jupiter, FL, 33458, USA
| | - Yanwen Duan
- Xiangya International Academy of Translational Medicine, Central South University, Tongzipo Road, #172, Yuelu District, Changsha, 410013, Hunan, China. .,Hunan Engineering Research Center of Combinatorial Biosynthesis and Natural Product Drug Discovery, Changsha, 410013, Hunan, China. .,National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, 410013, Hunan, China.
| | - Yong Huang
- Xiangya International Academy of Translational Medicine, Central South University, Tongzipo Road, #172, Yuelu District, Changsha, 410013, Hunan, China. .,National Engineering Research Center of Combinatorial Biosynthesis for Drug Discovery, Changsha, 410013, Hunan, China.
| |
Collapse
|
19
|
Duraipandiyan V, Al-Dhabi NA, Ignacimuthu S. New antimicrobial anthraquinone 6,6 1-bis (1,5,7-trihydroxy-3-hydroxymethylanthraquinone) isolated from Streptomyces sp. isolate ERI-26. Saudi J Biol Sci 2016; 23:731-735. [PMID: 27872569 PMCID: PMC5109497 DOI: 10.1016/j.sjbs.2016.02.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2015] [Revised: 01/26/2016] [Accepted: 02/04/2016] [Indexed: 11/29/2022] Open
Abstract
The present report is about Streptomyces sp. isolate ERI-26 isolated from the soil sample of Nilgiri forest, Western Ghats. The methanol extract of ERI-26 showed good antimicrobial activity against tested microbes. The antimicrobial novel anthraquinones were purified by bioactivity-guided fractionation using a silica gel column and preparative HPLC. The compound was characterized and identified by UV, IR, NMR and MASS spectral data. The compound named as 6,61-bis (1,5,7-trihydroxy-3-hydroxymethylanthraquinone), showed significant antimicrobial activities against tested microbes. The isolated compound inhibited the tested bacterial growth, Staphylococcus aureus at 62.5 μg/ml, Staphylococcus epidermidis at 15.62 μg/m, Bacillus subtilis at 62.5 μg/ml, fungi; Trichophyton mentagrophytes at 15.62 μg/m Trichophyton simii at 15.62 μg/ml, Aspergillus niger at. 7.81 μg/ml, Aspergiller flavus at 3.90 μg/ml, Trichophyton rubrum 296 at 62.5 μg/ml, T. rubrum 57/01 at 7.81 μg/ml, Magnaporthe grisea at 15.62 μg/ml. and Botrytis cinerea at 3.90 μg/ml. Isolated anthraquinone compound and its antimicrobial activity were newly reported.
Collapse
Affiliation(s)
- V Duraipandiyan
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box. 24551, Riyadh 11451, Saudi Arabia; Division of Microbiology, Entomology Research Institute, Loyola College, Chennai 600034, India
| | - Naif Abdullah Al-Dhabi
- Department of Botany and Microbiology, Addiriyah Chair for Environmental Studies, College of Science, King Saud University, P.O. Box. 24551, Riyadh 11451, Saudi Arabia
| | - S Ignacimuthu
- Division of Microbiology, Entomology Research Institute, Loyola College, Chennai 600034, India; Visiting Professor Programme, Deanship of Scientific Research, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
| |
Collapse
|
20
|
Recombinant secretory expression, purification and antimicrobial activity of PR39 in Bacillus subtilis using a maltose-inducible vector. Process Biochem 2015. [DOI: 10.1016/j.procbio.2015.08.005] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
21
|
Wetzel K, Cao J, Kothe E, Köhler JM. Changing growth behavior of heavy-metal tolerant bacteria: Media optimization using droplet-based microfluidics. Eng Life Sci 2015. [DOI: 10.1002/elsc.201400230] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022] Open
Affiliation(s)
- Katharina Wetzel
- Institute for Micro and Nanotechnologies; Institute for Chemistry and Biotechnology, Technical University Ilmenau; Ilmenau Germany
| | - Jialan Cao
- Institute for Micro and Nanotechnologies; Institute for Chemistry and Biotechnology, Technical University Ilmenau; Ilmenau Germany
| | - Erika Kothe
- Institute of Microbiology; Friedrich Schiller University; Jena Germany
| | - J. Michael Köhler
- Institute for Micro and Nanotechnologies; Institute for Chemistry and Biotechnology, Technical University Ilmenau; Ilmenau Germany
| |
Collapse
|
22
|
Svahn KS, Chryssanthou E, Olsen B, Bohlin L, Göransson U. Penicillium nalgiovense Laxa isolated from Antarctica is a new source of the antifungal metabolite amphotericin B. Fungal Biol Biotechnol 2015; 2:1. [PMID: 28955453 PMCID: PMC5611601 DOI: 10.1186/s40694-014-0011-x] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 12/15/2014] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND The need for new antibiotic drugs increases as pathogenic microorganisms continue to develop resistance against current antibiotics. We obtained samples from Antarctica as part of a search for new antimicrobial metabolites derived from filamentous fungi. This terrestrial environment near the South Pole is hostile and extreme due to a sparsely populated food web, low temperatures, and insufficient liquid water availability. We hypothesize that this environment could cause the development of fungal defense or survival mechanisms not found elsewhere. RESULTS We isolated a strain of Penicillium nalgiovense Laxa from a soil sample obtained from an abandoned penguin's nest. Amphotericin B was the only metabolite secreted from Penicillium nalgiovense Laxa with noticeable antimicrobial activity, with minimum inhibitory concentration of 0.125 μg/mL against Candida albicans. This is the first time that amphotericin B has been isolated from an organism other than the bacterium Streptomyces nodosus. In terms of amphotericin B production, cultures on solid medium proved to be a more reliable and favorable choice compared to liquid medium. CONCLUSIONS These results encourage further investigation of the many unexplored sampling sites characterized by extreme conditions, and confirm filamentous fungi as potential sources of metabolites with antimicrobial activity.
Collapse
Affiliation(s)
- K Stefan Svahn
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Erja Chryssanthou
- Department of Clinical Microbiology, Karolinska University Hospital & Karolinska Institute, Stockholm, Sweden
| | - Björn Olsen
- Department of Medical Sciences and Zoonosis Science Centre IMBIM, Uppsala University, Uppsala, Sweden
| | - Lars Bohlin
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| | - Ulf Göransson
- Department of Medicinal Chemistry, Uppsala University, Uppsala, Sweden
| |
Collapse
|
23
|
Govindarajan G, Satheeja Santhi V, Jebakumar SRD. Antimicrobial potential of phylogenetically unique actinomycete, Streptomyces sp. JRG-04 from marine origin. Biologicals 2014; 42:305-11. [PMID: 25205608 DOI: 10.1016/j.biologicals.2014.08.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2014] [Revised: 08/15/2014] [Accepted: 08/16/2014] [Indexed: 11/27/2022] Open
Abstract
Due to the emergence of severe infectious diseases and thriving antibiotic resistance, there is a need to explore microbial-derived bioactive secondary metabolites from unexplored regions. Present study deals with a mangrove estuary derived strain of Streptomyces sp. with potent antimicrobial activity against various pathogens, including methicillin resistant Staphylococcus aureus. Bioactive compound was effective even at low MIC level, damages the membrane of methicillin resistant S. aureus and causes cell death, however it has no cytotoxic effect on H9C2 cells. 16S rRNA shared 99.5% sequence similarity to Streptomyces longispororuber. Optimum biomass and antimicrobial compound production were observed in production medium supplemented with 1.0% maltose and 0.5% yeast extract. The active compound purified from the chloroform extract of the cell-free supernatant was studied by FT-IR, 1H NMR, 13C NMR and LC ESI-MS and identified as aromatic polyketide. β-ketosynthase (KS) domain of the Streptomyces strain revealed 93.2% sequence similarity to the benzoisochromanequinone, an actinorhodin biosynthetic gene cluster of Streptomyces coelicolor A3(2). However, the region synthesizing the secondary metabolite produced by the S. longispororuber was not related to the KS domain of the strain, due to the phenomenon of horizontal gene transfer over the period of evolutionary process, thus generating metabolic compound diversity.
Collapse
Affiliation(s)
- Ganesan Govindarajan
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Velayudhan Satheeja Santhi
- Department of Molecular Microbiology, School of Biotechnology, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | | |
Collapse
|
24
|
Screening for genes coding for putative antitumor compounds, antimicrobial and enzymatic activities from haloalkalitolerant and haloalkaliphilic bacteria strains of Algerian Sahara Soils. BIOMED RESEARCH INTERNATIONAL 2014; 2014:317524. [PMID: 24977147 PMCID: PMC4058248 DOI: 10.1155/2014/317524] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/26/2014] [Revised: 04/13/2014] [Accepted: 05/06/2014] [Indexed: 01/06/2023]
Abstract
Extreme environments may often contain unusual bacterial groups whose physiology is distinct from those of normal environments. To satisfy the need for new bioactive pharmaceuticals compounds and enzymes, we report here the isolation of novel bacteria from an extreme environment. Thirteen selected haloalkalitolerant and haloalkaliphilic bacteria were isolated from Algerian Sahara Desert soils. These isolates were screened for the presence of genes coding for putative antitumor compounds using PCR based methods. Enzymatic, antibacterial, and antifungal activities were determined by using cultural dependant methods. Several of these isolates are typical of desert and alkaline saline soils, but, in addition, we report for the first time the presence of a potential new member of the genus Nocardia with particular activity against the yeast Saccharomyces cerevisiae. In addition to their haloalkali character, the presence of genes coding for putative antitumor compounds, combined with the antimicrobial activity against a broad range of indicator strains and their enzymatic potential, makes them suitable for biotechnology applications.
Collapse
|
25
|
Falzone M, Martens E, Tynan H, Maggio C, Golden S, Nayda V, Crespo E, Inamine G, Gelber M, Lemence R, Chiappini N, Friedman E, Shen B, Gullo V, Demain AL. Development of a chemically defined medium for the production of the antibiotic platensimycin by Streptomyces platensis. Appl Microbiol Biotechnol 2014; 97:9535-9. [PMID: 24022611 DOI: 10.1007/s00253-013-5201-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2013] [Revised: 06/14/2013] [Accepted: 08/14/2013] [Indexed: 11/28/2022]
Abstract
The actinomycete Streptomyces platensis produces two compounds that display antibacterial activity: platensimycin and platencin. These compounds were discovered by the Merck Research Laboratories, and a complex insoluble production medium was reported. We have used this medium as our starting point in our studies. In a previous study, we developed a semi-defined production medium, i.e., PM5. In the present studies, by varying the concentration of the components of PM5, we were able to develop a superior semi-defined medium, i.e., PM6, which contains a higher concentration of lactose. Versions of PM6, containing lower concentrations of all components, were also found to be superior to PM5. The new semi-defined production media contain dextrin, lactose, MOPS buffer, and ammonium sulfate in different concentrations. We determined antibiotic production capabilities using agar diffusion assays and chemical assays via thin-layer silica chromatography and high-performance liquid chromatography. We reduced crude nutrient carryover from the seed medium by washing the cells with distilled water. Using these semi-defined media, we determined that addition of the semi-defined component soluble starch stimulated antibiotic production and that it and dextrin could both be replaced with glucose, resulting in the chemically defined medium, PM7.
Collapse
|
26
|
Design and high-level expression of a hybrid antimicrobial peptide LF15-CA8 in Escherichia coli. ACTA ACUST UNITED AC 2014; 41:527-34. [DOI: 10.1007/s10295-013-1382-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 11/06/2013] [Indexed: 01/01/2023]
Abstract
Abstract
Antimicrobial peptides (AMPs) have been paid considerable attention owing to their broad-spectrum antimicrobial activity and have great potential as novel antimicrobials. In this study, a novel hybrid peptide LF15-CA8 was designed on the basis of bovine lactoferricin (LfcinB) and cecropin A. The gene segment encoding LF15-CA8 was synthesized and cloned into pGEX-4T-BH to form pGEX-4T-LC1 containing one copy of the LF15-CA8 coding region. A series of recombinant vectors containing up to six multiple-copy LF15-CA8 coding regions, i.e., pGEX-4T-LCn (n = 1–6), were subsequently constructed, and used for transformation in Escherichia coli BL21(DE3). After induction with IPTG, pGEX-4T-LC1 and pGEX-4T-LC2 transformants successfully expressed fusion proteins GST-LF15-CA8 and GST-(LF15-CA8)2 in the form of inclusion bodies, respectively. The inclusion bodies were dissolved and the peptide was successfully released in 70 % formic acid in a single step. After purification, about 10.0 mg of the recombinant peptide LF15-CA8 with purity more than 97 % was obtained from 1 l of bacteria culture of pGEX-4T-LC2 transformants. LF15-CA8 caused an increase in antibacterial activity against Gram-positive bacterium (Staphylococcus aureus ATCC 25923) compared with the parent peptides and did not show obvious hemolytic activity against human erythrocytes in the range of effective antibacterial concentration. These results suggest that the peptide LF15-CA8 could be a promising candidate for therapeutic applications, and may lead to a cost-effective solution for the large-scale production of AMPs.
Collapse
|
27
|
Use of Metagenomics and Isolation of Actinobacteria in Brazil's Atlantic Rainforest Soil for Antimicrobial Prospecting. ISRN BIOTECHNOLOGY 2014; 2014:909601. [PMID: 25937991 PMCID: PMC4393038 DOI: 10.1155/2014/909601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2013] [Accepted: 02/10/2014] [Indexed: 11/17/2022]
Abstract
Modern techniques involving molecular biology, such as metagenomics, have the advantage of exploiting a higher number of microorganisms; however, classic isolation and culture methods used to obtain antimicrobials continue to be promising, especially in the isolation of Actinobacteria, which are responsible for the production of many of these compounds. In this work, two methodologies were used to search for antimicrobial substances—isolation of Actinobacteria and metagenomics of the Atlantic Rainforest soil and of the cultivation of cocoa intercropped with acai berry in the Atlantic Rainforest. The metagenomic libraries were constructed with the CopyControl Fosmid Library kit EPICENTRE, resulting in a total of 2688 clones, 1344 of each soil sample. None of the clones presented antimicrobial activity against the microorganisms tested: S. aureus, Bacillus subtilis, and Salmonella choleraesuis. A total of 46 isolates were obtained from the isolation of soil Actinobacteria: 24 isolates from Atlantic Rainforest soil and 22 isolates from the intercrop cultivation soil. Of these, two Atlantic Rainforest soil isolates inhibited the growth of S. aureus including a clinical isolate of S. aureus MRSA—a promising result, since it is an important multidrug-resistant human pathogen.
Collapse
|
28
|
Dufourcq R, Chalkiadakis E, Fauchon M, Deslandes E, Kerjean V, Chanteau S, Petit E, Guezennec J, Dupont-Rouzeyrol M. Isolation and partial characterization of bacteria (Pseudoalteromonas sp.) with potential antibacterial activity from a marine costal environment from New Caledonia. Lett Appl Microbiol 2013; 58:102-8. [PMID: 24106876 DOI: 10.1111/lam.12162] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2013] [Revised: 09/12/2013] [Accepted: 09/13/2013] [Indexed: 11/29/2022]
Abstract
UNLABELLED Marine bacteria are a rich source of bioactive metabolites. However, the microbial diversity of marine ecosystem still needs to be explored. The aim of this study was to isolate and characterize bacteria with antimicrobial activities from various marine coastal environment of New Caledonia. We obtained 493 marine isolates from various environments and samples of which 63 (12.8%) presented an antibacterial activity against a panel of reference pathogenic strains (Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Enterococcus faecalis). Ten out of the most promising strains were cultured, fractionated and screened for antibacterial activity. Four of them (NC282, NC412, NC272 and NC120) showed at least an activity against reference and multidrug-resistant pathogenic strains and were found to belong to the genus Pseudoalteromonas, according to the 16S phylogenetic analysis. The NC282 strain does not belong to any described Pseudoalteromonas species and might be of interest for further chemical and biological characterization. These findings suggest that the identified strains may contribute to the discovery for new sources of antimicrobial substances to develop new therapies to treat infections caused by multidrug-resistant bacteria. SIGNIFICANCE AND IMPACT OF THE STUDY With the constant increasing of bacterial resistance against known antibiotics in worldwide public health, it is now necessary to find new sources of antimicrobials. Marine bacteria from New Caledonia were isolated, tested for antibacterial activity and characterized to find new active molecules against multidrug-resistant bacteria. This study illustrates the diversity of the marine ecosystem with potent new bacteria species. Also the potential of marine bacteria as a rich source of bioactive molecule, for example antibiotics, is highlighted.
Collapse
Affiliation(s)
- R Dufourcq
- URE-DA (former Laboratoire d'Epidémiologie Moléculaire), Institut Pasteur de Nouvelle-Calédonie, Réseau International des Instituts Pasteur, Nouméa, Nouvelle-Calédonie, France
| | | | | | | | | | | | | | | | | |
Collapse
|
29
|
Andrimid production at low temperature by a psychrotolerant Serratia proteamaculans strain. World J Microbiol Biotechnol 2013; 29:1773-81. [DOI: 10.1007/s11274-013-1338-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2012] [Accepted: 03/24/2013] [Indexed: 12/29/2022]
|
30
|
Broussard TC, Kobe MJ, Pakhomova S, Neau DB, Price AE, Champion TS, Waldrop GL. The three-dimensional structure of the biotin carboxylase-biotin carboxyl carrier protein complex of E. coli acetyl-CoA carboxylase. Structure 2013; 21:650-7. [PMID: 23499019 DOI: 10.1016/j.str.2013.02.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2012] [Revised: 02/01/2013] [Accepted: 02/03/2013] [Indexed: 02/07/2023]
Abstract
Acetyl-coenzyme A (acetyl-CoA) carboxylase is a biotin-dependent, multifunctional enzyme that catalyzes the regulated step in fatty acid synthesis. The Escherichia coli enzyme is composed of a homodimeric biotin carboxylase (BC), biotinylated biotin carboxyl carrier protein (BCCP), and an α2β2 heterotetrameric carboxyltransferase. This enzyme complex catalyzes two half-reactions to form malonyl-coenzyme A. BC and BCCP participate in the first half-reaction, whereas carboxyltransferase and BCCP are involved in the second. Three-dimensional structures have been reported for the individual subunits; however, the structural basis for how BCCP reacts with the carboxylase or transferase is unknown. Therefore, we report here the crystal structure of E. coli BCCP complexed with BC to a resolution of 2.49 Å. The protein-protein complex shows a unique quaternary structure and two distinct interfaces for each BCCP monomer. These BCCP binding sites are unique compared to phylogenetically related biotin-dependent carboxylases and therefore provide novel targets for developing antibiotics against bacterial acetyl-CoA carboxylase.
Collapse
Affiliation(s)
- Tyler C Broussard
- Division of Biochemistry and Molecular Biology, Louisiana State University, Baton Rouge, LA 70803, USA
| | | | | | | | | | | | | |
Collapse
|
31
|
Hamed RB, Gomez-Castellanos JR, Henry L, Ducho C, McDonough MA, Schofield CJ. The enzymes of β-lactam biosynthesis. Nat Prod Rep 2013; 30:21-107. [DOI: 10.1039/c2np20065a] [Citation(s) in RCA: 146] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
|
32
|
Antimicrobials, drug discovery, and genome mining. Appl Microbiol Biotechnol 2012; 97:969-78. [PMID: 23233204 DOI: 10.1007/s00253-012-4609-8] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2012] [Revised: 11/18/2012] [Accepted: 11/20/2012] [Indexed: 10/27/2022]
Abstract
Over the years, antibiotics have provided an effective treatment for a number of microbial diseases. However recently, there has been an increase in resistant microorganisms that have adapted to our current antibiotics. One of the most dangerous pathogens is methicillin-resistant Staphylococcus aureus (MRSA). With the rise in the cases of MRSA and other resistant pathogens such as vancomycin-resistant Staphylococcus aureus, the need for new antibiotics increases every day. Many challenges face the discovery and development of new antibiotics, making it difficult for these new drugs to reach the market, especially since many of the pharmaceutical companies have stopped searching for antibiotics. With the advent of genome sequencing, new antibiotics are being found by the techniques of genome mining, offering hope for the future.
Collapse
|
33
|
Hüttel S, Müller R. Methods to optimize myxobacterial fermentations using off-gas analysis. Microb Cell Fact 2012; 11:59. [PMID: 22571441 PMCID: PMC3445963 DOI: 10.1186/1475-2859-11-59] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2012] [Accepted: 05/09/2012] [Indexed: 11/12/2022] Open
Abstract
Background The influence of carbon dioxide and oxygen on microbial secondary metabolite producers and the maintenance of these two parameters at optimal levels have been studied extensively. Nevertheless, most studies have focussed on their influence on specific product formation and condition optimization of established processes. Considerably less attention has been paid to the influence of reduced or elevated carbon dioxide and oxygen levels on the overall metabolite profiles of the investigated organisms. The synergistic action of both gases has garnered even less attention. Results We show that the composition of the gas phase is highly important for the production of different metabolites and present a simple approach that enables the maintenance of defined concentrations of both O2 and CO2 during bioprocesses over broad concentration ranges with a minimal instrumental setup by using endogenously produced CO2. The metabolite profiles of a myxobacterium belonging to the genus Chondromyces grown under various concentrations of CO2 and O2 showed considerable differences. Production of two unknown, highly cytotoxic compounds and one antimicrobial substance was found to increase depending on the gas composition. In addition, the observation of CO2 and O2 in the exhaust gas allowed optimization and control of production processes. Conclusions Myxobacteria are becoming increasingly important due to their potential for bioactive secondary metabolite production. Our studies show that the influence of different gas partial pressures should not be underestimated during screening processes for novel compounds and that our described method provides a simple tool to investigate this question.
Collapse
Affiliation(s)
- Stephan Hüttel
- Department of Pharmaceutical Biotechnology, Saarland University, Saarbruecken, Germany
| | | |
Collapse
|
34
|
Schmieder R, Edwards R. Insights into antibiotic resistance through metagenomic approaches. Future Microbiol 2012; 7:73-89. [PMID: 22191448 DOI: 10.2217/fmb.11.135] [Citation(s) in RCA: 181] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
The consequences of bacterial infections have been curtailed by the introduction of a wide range of antibiotics. However, infections continue to be a leading cause of mortality, in part due to the evolution and acquisition of antibiotic-resistance genes. Antibiotic misuse and overprescription have created a driving force influencing the selection of resistance. Despite the problem of antibiotic resistance in infectious bacteria, little is known about the diversity, distribution and origins of resistance genes, especially for the unculturable majority of environmental bacteria. Functional and sequence-based metagenomics have been used for the discovery of novel resistance determinants and the improved understanding of antibiotic-resistance mechanisms in clinical and natural environments. This review discusses recent findings and future challenges in the study of antibiotic resistance through metagenomic approaches.
Collapse
Affiliation(s)
- Robert Schmieder
- Computational Science Research Center & Department of Computer Science, San Diego State University, San Diego, CA 92182, USA
| | | |
Collapse
|
35
|
Abreu AC, McBain AJ, Simões M. Plants as sources of new antimicrobials and resistance-modifying agents. Nat Prod Rep 2012; 29:1007-21. [DOI: 10.1039/c2np20035j] [Citation(s) in RCA: 288] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
|
36
|
Jorge P, Lourenço A, Pereira MO. New trends in peptide-based anti-biofilm strategies: a review of recent achievements and bioinformatic approaches. BIOFOULING 2012; 28:1033-1061. [PMID: 23016989 DOI: 10.1080/08927014.2012.728210] [Citation(s) in RCA: 89] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Antimicrobial peptides (AMPs) have a broad spectrum of activity and unspecific mechanisms of action. Therefore, they are seen as valid alternatives to overcome clinically relevant biofilms and reduce the chance of acquired resistance. This paper reviews AMPs and anti-biofilm AMP-based strategies and discusses ongoing and future work. Recent studies report successful AMP-based prophylactic and therapeutic strategies, several databases catalogue AMP information and analysis tools, and novel bioinformatics tools are supporting AMP discovery and design. However, most AMP studies are performed with planktonic cultures, and most studies on sessile cells test AMPs on growing rather than mature biofilms. Promising preliminary synergistic studies have to be consubstantiated and the study of functionalized coatings with AMPs must be further explored. Standardized operating protocols, to enforce the repeatability and reproducibility of AMP anti-biofilm tests, and automated means of screening and processing the ever-expanding literature are still missing.
Collapse
Affiliation(s)
- Paula Jorge
- IBB - Institute for Biotechnology and Bioengineering, Centre of Biological Engineering, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
| | | | | |
Collapse
|
37
|
Kardos N, Demain AL. Penicillin: the medicine with the greatest impact on therapeutic outcomes. Appl Microbiol Biotechnol 2011; 92:677-87. [PMID: 21964640 DOI: 10.1007/s00253-011-3587-6] [Citation(s) in RCA: 87] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2011] [Revised: 08/26/2011] [Accepted: 09/15/2011] [Indexed: 10/17/2022]
Abstract
The principal point of this paper is that the discovery of penicillin and the development of the supporting technologies in microbiology and chemical engineering leading to its commercial scale production represent it as the medicine with the greatest impact on therapeutic outcomes. Our nomination of penicillin for the top therapeutic molecule rests on two lines of evidence concerning the impact of this event: (1) the magnitude of the therapeutic outcomes resulting from the clinical application of penicillin and the subsequent widespread use of antibiotics and (2) the technologies developed for production of penicillin, including both microbial strain selection and improvement plus chemical engineering methods responsible for successful submerged fermentation production. These became the basis for production of all subsequent antibiotics in use today. These same technologies became the model for the development and production of new types of bioproducts (i.e., anticancer agents, monoclonal antibodies, and industrial enzymes). The clinical impact of penicillin was large and immediate. By ushering in the widespread clinical use of antibiotics, penicillin was responsible for enabling the control of many infectious diseases that had previously burdened mankind, with subsequent impact on global population demographics. Moreover, the large cumulative public effect of the many new antibiotics and new bioproducts that were developed and commercialized on the basis of the science and technology after penicillin demonstrates that penicillin had the greatest therapeutic impact event of all times.
Collapse
Affiliation(s)
- Nelson Kardos
- Charles A. Dana Research Institute for Scientists Emeriti (R.I.S.E.), Drew University, Madison, NJ 07940, USA.
| | | |
Collapse
|
38
|
Vondenhoff GH, Dubiley S, Severinov K, Lescrinier E, Rozenski J, Van Aerschot A. Extended targeting potential and improved synthesis of Microcin C analogs as antibacterials. Bioorg Med Chem 2011; 19:5462-7. [DOI: 10.1016/j.bmc.2011.07.052] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2011] [Revised: 07/20/2011] [Accepted: 07/23/2011] [Indexed: 11/15/2022]
|
39
|
|