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Tong SY, Ye K, Wang WX, Ai HL. Harzianic acids and oxazolidinone from the endophytic fungus Ilyonectria sp. and their cytotoxicity activity. Fitoterapia 2024; 175:105941. [PMID: 38575089 DOI: 10.1016/j.fitote.2024.105941] [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: 11/24/2023] [Revised: 03/08/2024] [Accepted: 04/01/2024] [Indexed: 04/06/2024]
Abstract
Four undescribed compounds including three harzianic acids (1, 3 and 4) and one oxazolidinone (2), along with three known ones (5-7) were isolated from the solid fermented product of endophytic fungus Ilyonectria sp., their structures were elucidated as 1-amino-harzianic acid (1), ilyonectria-oxazolidinone (2),10'-nor- isoharzianic acid (3), isohomoharzianic acid (4), harzianic acid (5), isoharzianic acid (6), homoharzianic acid (7) by means of detailed chemical evidences and spectroscopic data analysis. All the compounds were evaluated for cytotoxicity against SMMC-7721 human cancer cell lines by MTS assay. Among the seven tested compounds, 1-amino-harzianic acid (1) demonstrated well cytotoxic activity against SMMC-7721 with IC50 value of 26.84 μM. The results of molecular docking indicated that compound exhibited moderate anti-tumor activity may through binding to apoptosis related proteins.
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Affiliation(s)
- Shun-Yao Tong
- School of Pharmaceutical Science, South-Central Minzu University, Wuhan, Hubei 430074, China
| | - Ke Ye
- School of Pharmaceutical Science, South-Central Minzu University, Wuhan, Hubei 430074, China
| | - Wen-Xiang Wang
- School of Pharmacy, Chongqing Three Gorges Medical College, Chongqing 404120, China.
| | - Hong-Lian Ai
- School of Pharmaceutical Science, South-Central Minzu University, Wuhan, Hubei 430074, China.
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2
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Byeon H, Kim J, Lee MH, Jang HY. Ir(tri-N-heterocyclic carbene)-catalyzed upgrading of glycerol: C-C bond formation for the synthesis of α-hydroxy acids. Org Biomol Chem 2024; 22:1613-1618. [PMID: 38305776 DOI: 10.1039/d3ob02035e] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2024]
Abstract
Ir(triNHC) complexes catalyzed glycerol and alcohol dehydrogenative coupling, yielding diverse α-hydroxy acids. Unlike conventional conditions, Ir(triNHC) facilitated additional C-C bond formation after lactic acid production from glycerol, exhibiting high TOFs. This protocol successfully converted 1,2-propanediol and sorbitol into α-hydroxy acids, highlighting biomass-derived sources' potential as valuable platform chemicals.
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Affiliation(s)
- Heemin Byeon
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea.
| | - Jaeho Kim
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea.
| | - Mi-Hyun Lee
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea.
| | - Hye-Young Jang
- Department of Energy Systems Research, Ajou University, Suwon 16499, Korea.
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3
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Fernandes GFS, Scarim CB, Kim SH, Wu J, Castagnolo D. Oxazolidinones as versatile scaffolds in medicinal chemistry. RSC Med Chem 2023; 14:823-847. [PMID: 37252095 PMCID: PMC10211318 DOI: 10.1039/d2md00415a] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/23/2022] [Accepted: 02/06/2023] [Indexed: 11/19/2023] Open
Abstract
Oxazolidinone is a five-member heterocyclic ring with several biological applications in medicinal chemistry. Among the three possible isomers, 2-oxazolidinone is the most investigated in drug discovery. Linezolid was pioneered as the first approved drug containing an oxazolidinone ring as the pharmacophore group. Numerous analogues have been developed since its arrival on the market in 2000. Some have succeeded in reaching the advanced stages of clinical studies. However, most oxazolidinone derivatives reported in recent decades have not reached the initial stages of drug development, despite their promising pharmacological applications in a variety of therapeutic areas, including antibacterial, antituberculosis, anticancer, anti-inflammatory, neurologic, and metabolic diseases, among other areas. Therefore, this review article aims to compile the efforts of medicinal chemists who have explored this scaffold over the past decades and highlight the potential of the class for medicinal chemistry.
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Affiliation(s)
| | - Cauê Benito Scarim
- Department of Drugs and Medicines, School of Pharmaceutical Sciences, São Paulo State University Araraquara 14800903 Brazil
| | - Seong-Heun Kim
- Department of Chemistry, University College London 20 Gordon Street WC1H 0AJ London UK
- School of Cancer and Pharmaceutical Sciences, King's College London 150 Stamford Street SE1 9NH London UK
| | - Jingyue Wu
- Department of Chemistry, University College London 20 Gordon Street WC1H 0AJ London UK
| | - Daniele Castagnolo
- Department of Chemistry, University College London 20 Gordon Street WC1H 0AJ London UK
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4
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Ndukwe ARN, Wiedbrauk S, Boase NRB, Fairfull-Smith KE. Strategies to improve the potency of oxazolidinones towards bacterial biofilms. Chem Asian J 2022; 17:e202200201. [PMID: 35352479 PMCID: PMC9321984 DOI: 10.1002/asia.202200201] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2022] [Revised: 03/28/2022] [Indexed: 11/29/2022]
Abstract
Biofilms are part of the natural lifecycle of bacteria and are known to cause chronic infections that are difficult to treat. Most antibiotics are developed and tested against bacteria in the planktonic state and are ineffective against bacterial biofilms. The oxazolidinones, including the last resort drug linezolid, are one of the main classes of synthetic antibiotics progressed to clinical use in the last 50 years. They have a unique mechanism of action and only develop low levels of resistance in the clinical setting. With the aim of providing insight into strategies to design more potent antibiotic compounds with activity against bacterial biofilms, we review the biofilm activity of clinically approved oxazolidinones and report on structural modifications to oxazolidinones and their delivery systems which lead to enhanced anti‐biofilm activity.
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Affiliation(s)
- Audrey R N Ndukwe
- Queensland University of Technology - QUT: Queensland University of Technology, Faculty of Science, AUSTRALIA
| | - Sandra Wiedbrauk
- Queensland University of Technology - QUT: Queensland University of Technology, Faculty of Science, AUSTRALIA
| | - Nathan R B Boase
- Queensland University of Technology - QUT: Queensland University of Technology, Faculty of Science, AUSTRALIA
| | - Kathryn E Fairfull-Smith
- Queensland University of Technology Faculty of Science, Centre for Materials Science, 2 George St, 4001, Brisbane, AUSTRALIA
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5
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Sarkar S, Ghosh S, Islam SM. Zn(II)-Functionalized COF as a Recyclable Catalyst for the Sustainable Synthesis of Cyclic Carbonates and Cyclic Carbamates from Atmospheric CO2. Org Biomol Chem 2022; 20:1707-1722. [DOI: 10.1039/d1ob01938d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A simple covalent organic framework (COF) bearing β-ketoenamine units as a potential heterogeneous ligand for ZnII-catalyzed fixation and transformation of CO2 into value-added chemicals is reported. Catalytic investigations convincingly demonstrated...
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6
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Jain A, Rana NK. Review on Asymmetric Catalysis Employing 5
H‐
Oxazol‐4‐Ones as α‐Hydroxy Carboxylic Acid Surrogates. Adv Synth Catal 2021. [DOI: 10.1002/adsc.202100456] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Anshul Jain
- Department of Chemistry Indian Institute of Technology Jodhpur Jodhpur Rajasthan 342037 India
| | - Nirmal K. Rana
- Department of Chemistry Indian Institute of Technology Jodhpur Jodhpur Rajasthan 342037 India
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7
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Bamunuarachchi NI, Khan F, Kim YM. Antimicrobial Properties of Actively Purified Secondary Metabolites Isolated from Different Marine Organisms. Curr Pharm Biotechnol 2021; 22:920-944. [PMID: 32744964 DOI: 10.2174/1389201021666200730144536] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/30/2020] [Accepted: 06/14/2020] [Indexed: 11/22/2022]
Abstract
BACKGROUND The treatment of infection caused by pathogenic bacteria becomes one of the serious concerns globally. The failure in the treatment was found due to the exhibition of multiple resistance mechanisms against the antimicrobial agents. The emergence of resistant bacterial species has also been observed due to prolong treatment using conventional antibiotics. To combat these problems, several alternative strategies have been employed using biological and chemically synthesized compounds as antibacterial agents. Marine organisms are considered as one of the potential sources for the isolation of bioactive compounds due to the easily available, cost-effective, and eco-friendly. METHODS The online search methodology was adapted for the collection of information related to the antimicrobial properties of marine-derived compounds. These compound has been isolated and purified by different purification techniques, and their structure also characterized. Furthermore, the antibacterial activities have been reported by using broth microdilution as well as disc diffusion assays. RESULTS The present review paper describes the antimicrobial effect of diverse secondary metabolites which are isolated and purified from the different marine organisms. The structural elucidation of each secondary metabolite has also been done in the present paper, which will help for the in silico designing of the novel and potent antimicrobial compounds. CONCLUSION A thorough literature search has been made and summarizes the list of antimicrobial compounds that are isolated from both prokaryotic and eukaryotic marine organisms. The information obtained from the present paper will be helpful for the application of marine compounds as antimicrobial agents against different antibiotic-resistant human pathogenic bacteria.
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Affiliation(s)
| | - Fazlurrahman Khan
- Institute of Food Science, Pukyong National University, Busan 48513, Korea
| | - Young-Mog Kim
- Department of Food Science and Technology, Pukyong National University, Busan 48513, Korea
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Valdes-Pena MA, Massaro NP, Lin YC, Pierce JG. Leveraging Marine Natural Products as a Platform to Tackle Bacterial Resistance and Persistence. Acc Chem Res 2021; 54:1866-1877. [PMID: 33733746 DOI: 10.1021/acs.accounts.1c00007] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Antimicrobial resistance to existing antibiotics represents one of the greatest threats to human health and is growing at an alarming rate. To further complicate treatment of bacterial infections, many chronic infections are the result of bacterial biofilms that are tolerant to treatment with antibiotics because of the presence of metabolically dormant persister cell populations. Together these threats are creating an increasing burden on the healthcare system, and a "preantibiotic" age is on the horizon if significant action is not taken by the scientific and medical communities. While the golden era of antibiotic discovery (1940s-1960s) produced most of the antibiotic classes in clinical use today, followed by several decades of limited development, there has been a resurgence in antibiotic drug discovery in recent years fueled by the academic and biotech sectors. Historically, great success has been achieved by developing next-generation variants of existing classes of antibiotics, but there remains a dire need for the identification of novel scaffolds and/or antimicrobial targets to drive future efforts to overcome resistance and tolerance. In this regard, there has been no more valuable source for the identification of antibiotics than natural products, with 69-77% of approved antibiotics either being such compounds or being derived from them.Our group has developed a program centered on the chemical synthesis and chemical microbiology of marine natural products with unusual structures and promising levels of activity against multidrug-resistant (MDR) bacterial pathogens. As we are motivated by preparing and studying the biological effects of these molecules, we are not initially pursuing a biological question but instead are allowing the observed phenotypes and activities to guide the ultimate project direction. In this Account, our recent efforts on the synoxazolidinone, lipoxazolidinone, and batzelladine natural products will be discussed and placed in the context of the field's greatest challenges and opportunities. Specifically, the synoxazolidinone family of 4-oxazolidinone-containing natural products has led to the development of several chemical methods to prepare antimicrobial scaffolds and has revealed compounds with potent activity as adjuvants to treat bacterial biofilms. Bearing the same 4-oxazolidinone core, the lipoxazolidinones have proven to be potent single-agent antibiotics. Finally, our synthetic efforts toward the batzelladines revealed analogues with activity against a number of MDR pathogens, highlighted by non-natural stereochemical isomers with superior activity and simplified synthetic access. Taken together, these studies provide several distinct platforms for the development of novel therapeutics that can add to our arsenal of scaffolds for preclinical development and can provide insight into the biochemical processes and pathways that can be targeted by small molecules in the fight against antimicrobial-resistant and -tolerant infections. We hope that this work will serve as inspiration for increased efforts by the scientific community to leverage synthetic chemistry and chemical microbiology toward novel antibiotics that can combat the growing crisis of MDR and tolerant bacterial infections.
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Affiliation(s)
- M. Alejandro Valdes-Pena
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
| | - Nicholas P. Massaro
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
| | - You-Chen Lin
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
| | - Joshua G. Pierce
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
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Zhu Y, Xu G, Song W, Wu M, Yao R, Sadeghzadeh SM. Cu2O Nanocatalysts Immobilized on p(SBMA) for Synergistic CO2 Activation to Afford Esters and Heterocycles at Ambient Pressure. Catal Letters 2021. [DOI: 10.1007/s10562-020-03518-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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10
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Yuan YC, Abd El Sater M, Mellah M, Jaber N, David ORP, Schulz E. Enantiopure isothiourea@carbon-based support: stacking interactions for recycling a lewis base in asymmetric catalysis. Org Chem Front 2021. [DOI: 10.1039/d1qo00646k] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
An enantiopure isothiourea (hyperBTM) was functionalized by a pyrene moiety via click chemistry; immobilized on reduced Graphene Oxide, this recyclable chiral organocatalyst promotes formal [3+2] cycloaddition of ammonium enolates with oxaziridines.
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Affiliation(s)
- Yu-Chao Yuan
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
- Institut Lavoisier, UMR 8180, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris Saclay, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Mariam Abd El Sater
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
- Laboratoire de Chimie Médicinale et des Produits Naturels, Université Libanaise, Faculté des Sciences (I) and PRASE-EDST, Hadath, Beyrouth, Lebanon
| | - Mohamed Mellah
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
| | - Nada Jaber
- Laboratoire de Chimie Médicinale et des Produits Naturels, Université Libanaise, Faculté des Sciences (I) and PRASE-EDST, Hadath, Beyrouth, Lebanon
| | - Olivier R. P. David
- Institut Lavoisier, UMR 8180, Université de Versailles Saint-Quentin-en-Yvelines, Université Paris Saclay, 45 avenue des Etats-Unis, 78035 Versailles, France
| | - Emmanuelle Schulz
- Université Paris Saclay, CNRS, Institut de Chimie Moléculaire et des Matériaux d'Orsay, 91405 Orsay, France
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Chauhan DS, Gupta P, Pottoo FH, Amir M. Secondary Metabolites in the Treatment of Diabetes Mellitus: A Paradigm Shift. Curr Drug Metab 2020; 21:493-511. [PMID: 32407267 DOI: 10.2174/1389200221666200514081947] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2019] [Revised: 01/07/2020] [Accepted: 03/10/2020] [Indexed: 01/09/2023]
Abstract
Diabetes mellitus (DM) is a chronic, polygenic and non-infectious group of diseases that occurs due to insulin resistance or its low production by the pancreas and is also associated with lifelong damage, dysfunction and collapse of various organs. Management of diabetes is quite complex having many bodily and emotional complications and warrants efficient measures for prevention and control of the same. As per the estimates of the current and future diabetes prevalence, around 425 million people were diabetic in 2017 which is anticipated to rise up to 629 million by 2045. Various studies have vaguely proven the fact that several vitamins, minerals, botanicals and secondary metabolites demonstrate hypoglycemic activity in vivo as well as in vitro. Flavonoids, anthocyanin, catechin, lipoic acid, coumarin metabolites, etc. derived from herbs were found to elicit a significant influence on diabetes. However, the prescription of herbal compounds depend on various factors, including the degree of diabetes progression, comorbidities, feasibility, economics as well as their ADR profile. For instance, cinnamon could be a more favorable choice for diabetic hypertensive patients. Diabecon®, Glyoherb® and Diabeta Plus® are some of the herbal products that had been launched in the market for the favorable or adjuvant therapy of diabetes. Moreover, Aloe vera leaf gel extract demonstrates significant activity in diabetes. The goal of this review was to inscribe various classes of secondary metabolites, in particular those obtained from plants, and their role in the treatment of DM. Recent advancements in recognizing the markers which can be employed for identifying altered metabolic pathways, biomarker discovery, limitations, metabolic markers of drug potency and off-label effects are also reviewed.
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Affiliation(s)
| | - Paras Gupta
- Department of Clinical Research, DIPSAR, Pushp Vihar Sec-3, New Dehli, India
| | - Faheem Hyder Pottoo
- Department of Pharmacology, College of Clinical Pharmacy, Imam Abdulrahman Bin Faisal University, Dammam, 31441, Saudi Arabia
| | - Mohd Amir
- Department of Natural Product & Alternative Medicine, College of Clinical Pharmacy, Imam Abdul Rahman Bin Faisal University, Dammam, 31441, Saudi Arabia
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Genetic Determinants of Salmonella Resistance to the Biofilm-Inhibitory Effects of a Synthetic 4-Oxazolidinone Analog. Appl Environ Microbiol 2020; 86:AEM.01120-20. [PMID: 32769186 DOI: 10.1128/aem.01120-20] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2020] [Accepted: 07/30/2020] [Indexed: 12/13/2022] Open
Abstract
Biofilms formed by Salmonella enterica are a frequent source of food supply contamination. Since biofilms are inherently resistant to disinfection, new agents capable of preventing biofilm formation are needed. Synthetic analogs of 4-oxazolidinone containing natural products have shown promise as antibiofilm compounds against Gram-positive bacteria. The purpose of our study was 2-fold: to establish the antibiofilm effects and mechanism of action of a synthetic 4-oxazolidinone analog (JJM-ox-3-70) and to establish mechanisms of resistance to this compound in Salmonella enterica serovar Typhimurium (S Typhimurium). JJM-ox-3-70 inhibited biofilm formation but had no effect on cell growth. The antibiofilm effects were linked to disruption of curli fimbriae and flagellar gene expression and alteration in swimming motility, suggesting an effect on multiple cellular processes. Using a 2-step screening approach of defined multigene and single-gene deletion mutant libraries, we identified 3 mutants that produced less biofilm in the presence of JJM-ox-3-70 than the isogenic WT, with phenotypes reversed by complementation in trans Genes responsible for S Typhimurium resistance to the compound included acrB, a component of the major drug efflux pump AcrAB-TolC, and two genes of unknown function (STM0437 and STM1292). The results of this study suggest that JJM-ox-3-70 inhibits biofilm formation by indirect inhibition of extracellular matrix production that may be linked to disruption of flagellar motility. Further work is needed to establish the role of the newly characterized genes as potential mechanisms of biofilm intrinsic antimicrobial resistance.IMPORTANCE Biofilms are resistant to killing by disinfectants and antimicrobials. S. enterica biofilms facilitate long-term host colonization and persistence in food processing environments. Synthetic analogs of 4-oxazolidinone natural products show promise as antibiofilm agents. Here, we show that a synthetic 4-oxazolidinone analog inhibits Salmonella biofilm through effects on both motility and biofilm matrix gene expression. Furthermore, we identify three genes that promote Salmonella resistance to the antibiofilm effects of the compound. This work provides insight into the mechanism of antibiofilm effects of a synthetic 4-oxazolidinone analog in Gram-negative bacteria and demonstrates new mechanisms of intrinsic antimicrobial resistance in Salmonella biofilms.
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Wang C, Lu Y, Cao S. Antimicrobial compounds from marine actinomycetes. Arch Pharm Res 2020; 43:677-704. [PMID: 32691395 DOI: 10.1007/s12272-020-01251-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2020] [Accepted: 07/14/2020] [Indexed: 04/03/2023]
Abstract
Marine actinomycetes were the main origin of marine natural products in the past 40 years. This review was to present the sources, structures and antimicrobial activities of 313 new natural products from marine actinomycetes reported from 1976 to 2019.
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Affiliation(s)
- Cong Wang
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, 200 W. Kawili St., Hilo, HI, 96720, USA.,Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, 530006, China
| | - Yuanyu Lu
- Guangxi Key Laboratory of Chemistry and Engineering of Forest Products, School of Chemistry and Chemical Engineering, Guangxi University for Nationalities, Nanning, 530006, China
| | - Shugeng Cao
- Department of Pharmaceutical Sciences, Daniel K. Inouye College of Pharmacy, University of Hawai'i at Hilo, 200 W. Kawili St., Hilo, HI, 96720, USA.
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Barbosa F, Pinto E, Kijjoa A, Pinto M, Sousa E. Targeting antimicrobial drug resistance with marine natural products. Int J Antimicrob Agents 2020; 56:106005. [PMID: 32387480 DOI: 10.1016/j.ijantimicag.2020.106005] [Citation(s) in RCA: 39] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/24/2019] [Revised: 04/23/2020] [Accepted: 04/24/2020] [Indexed: 01/10/2023]
Abstract
The rise and spread of antimicrobial resistance represents one of the most pressing health issues of today. Antimicrobial resistance in micro-organisms can arise due to a multiplicity of factors, including permeability changes in the cell membrane, increase of drug efflux pumps, enzymatic modification or inactivation of the antibiotic, target site modification, alternative metabolic pathways and biofilm formation. The marine environment is a valuable source of diverse natural products with a huge variety of biological activities. Among them, antimicrobial compounds show promising biological activities against numerous drug-resistant bacteria and fungi, making marine natural products a very promising resource in the search for novel antimicrobial agents. This review summarises the state-of-art of marine natural products with antibacterial and antifungal properties against drug-resistant micro-organisms. These natural products were categorised based on their chemical structure, and their respective sources and activities are highlighted. The chemical diversity associated with these marine-derived molecules is enormous, including peptides, polyketides, alkaloids, sterols, terpenoids, lactones, halogenated compounds, nucleosides, etc., some of which have rare substructures. Some of the marine compounds mentioned do not have intrinsic antimicrobial activity but potentiate the antimicrobial effect of other antimicrobials via inhibition of efflux pumps. Although these agents are still in preclinical studies, evidence of their in vivo efficacy suggest research of new drugs from the ocean to overcome antimicrobial resistance in order to fulfil an unmet medical need.
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Affiliation(s)
- Filipa Barbosa
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Eugénia Pinto
- Laboratory of Microbiology, Biological Sciences Department, Faculty of Pharmacy, University of Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208 Matosinhos, Portugal
| | - Anake Kijjoa
- CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208 Matosinhos, Portugal; Instituto de Ciências Biomédicas Abel Salazar (ICBAS), Universidade do Porto, Rua de Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal
| | - Madalena Pinto
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208 Matosinhos, Portugal
| | - Emília Sousa
- Laboratory of Organic and Pharmaceutical Chemistry, Department of Chemical Sciences, Faculty of Pharmacy, University of Porto, Rua Jorge Viterbo Ferreira 228, 4050-313 Porto, Portugal; CIIMAR/CIMAR-Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Terminal de Cruzeiros do Porto de Leixões, Avenida General Norton de Matos, 4450-208 Matosinhos, Portugal.
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Zheng K, Hong R. Postulated Biogenesis-Guided Total Synthesis and Structural Revision of 2,18-seco-Lankacidinol A. Org Lett 2020; 22:3785-3788. [DOI: 10.1021/acs.orglett.0c00993] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
- Kuan Zheng
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
- University of Chinese Academy of Sciences, 19A Yuquan Road, Beijing 100049, China
| | - Ran Hong
- CAS Key Laboratory of Synthetic Chemistry of Natural Substances, Center for Excellence in Molecular Synthesis, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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16
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Feng L, Li X, Xu C, Sadeghzadeh SM. Green synthesis of Dy2Ce2O7 Nanoparticles Immobilized on Fibrous Nano-silica for Synthesis of 3-Aryl-2-oxazolidinones from Alkenes, Amines, and Carbon Dioxide. Catal Letters 2019. [DOI: 10.1007/s10562-019-03073-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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17
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Kim E, Mun D, Kim S. Synthesis of Dihydrobenzoxazine‐Fused Spirooxazoline‐4‐ones via [3+2] Cycloaddition of Azaoxyallyl Cations with Vinyl Benzoxazinanones. ASIAN J ORG CHEM 2019. [DOI: 10.1002/ajoc.201900517] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Eunjin Kim
- Department of ChemistryKyonggi University 154-42 Gwanggyosan-ro, Yeongtong-gu Suwon 16227 Republic of Korea
| | - Dasom Mun
- Department of ChemistryKyonggi University 154-42 Gwanggyosan-ro, Yeongtong-gu Suwon 16227 Republic of Korea
| | - Sung‐Gon Kim
- Department of ChemistryKyonggi University 154-42 Gwanggyosan-ro, Yeongtong-gu Suwon 16227 Republic of Korea
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18
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Robinson KR, Mills JJ, Pierce JG. Expanded Structure-Activity Studies of Lipoxazolidinone Antibiotics. ACS Med Chem Lett 2019; 10:374-377. [PMID: 30891143 DOI: 10.1021/acsmedchemlett.9b00015] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2019] [Accepted: 02/26/2019] [Indexed: 11/30/2022] Open
Abstract
The lipoxazolidinone family of marine natural products, which contains an unusual 4-oxazolidinone core, was found to possess potent antimicrobial activity against methicillin resistant Staphylococcus aureus (MRSA). Herein, we expanded our previous synthetic efforts by preparing selected aryl derivatives of the lipoxazolidinones and further evaluating the potential to expand the activity of this class of molecules to Gram-negative pathogens. With these analogs, we explored the effect of varying the substitution pattern around the aromatic ring, increasing the chain length between the oxazolidinone core and the aryl system, and how altering the position of more polar functional groups affected the antimicrobial activity. Finally, we utilized a TolC knockout strain of E. coli to demonstrate that our compounds are subject to efflux in Gram-negative pathogens, and activity is restored in these knockouts. Together these results provide additional data for the further development of 4-oxazolidinone analogs 5, 20, and 21 for the treatment of infectious disease.
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Affiliation(s)
- Kaylib R. Robinson
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
| | - Jonathan J. Mills
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
| | - Joshua G. Pierce
- Department of Chemistry and Comparative Medicine Institute, NC State University, Raleigh, North Carolina 27695, United States
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19
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Pandey A. Pharmacological Potential of Marine Microbes. ENVIRONMENTAL CHEMISTRY FOR A SUSTAINABLE WORLD 2019. [DOI: 10.1007/978-3-030-04675-0_1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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20
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Mills JJ, Robinson KR, Zehnder TE, Pierce JG. Synthesis and Biological Evaluation of the Antimicrobial Natural Product Lipoxazolidinone A. Angew Chem Int Ed Engl 2018. [DOI: 10.1002/ange.201805078] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Jonathan J. Mills
- Department of Chemistry and Comparative Medicine Institute North Carolina State University 2620 Yarbrough Drive Raleigh NC 27695 USA
| | - Kaylib R. Robinson
- Department of Chemistry and Comparative Medicine Institute North Carolina State University 2620 Yarbrough Drive Raleigh NC 27695 USA
| | - Troy E. Zehnder
- Department of Chemistry and Comparative Medicine Institute North Carolina State University 2620 Yarbrough Drive Raleigh NC 27695 USA
| | - Joshua G. Pierce
- Department of Chemistry and Comparative Medicine Institute North Carolina State University 2620 Yarbrough Drive Raleigh NC 27695 USA
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21
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Mills JJ, Robinson KR, Zehnder TE, Pierce JG. Synthesis and Biological Evaluation of the Antimicrobial Natural Product Lipoxazolidinone A. Angew Chem Int Ed Engl 2018; 57:8682-8686. [PMID: 29845720 DOI: 10.1002/anie.201805078] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Indexed: 11/09/2022]
Abstract
Natural products have historically been a major source of antibiotics and therefore novel scaffolds are constantly of interest. The lipoxazolidinone family of marine natural products, with an unusual 4-oxazolidinone heterocycle at their core, represents a new scaffold for antimicrobial discovery; however, questions regarding their mechanism of action and high lipophilicity have likely slowed follow-up studies. Herein, we report the first synthesis of lipoxazolidinone A, 15 structural analogues to explore its active pharmacophore, and initial resistance and mechanism of action studies. These results suggest that 4-oxazolidinones are valuable scaffolds for antimicrobial development and reveal simplified lead compounds for further optimization.
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Affiliation(s)
- Jonathan J Mills
- Department of Chemistry and Comparative Medicine Institute, North Carolina State University, 2620 Yarbrough Drive, Raleigh, NC, 27695, USA
| | - Kaylib R Robinson
- Department of Chemistry and Comparative Medicine Institute, North Carolina State University, 2620 Yarbrough Drive, Raleigh, NC, 27695, USA
| | - Troy E Zehnder
- Department of Chemistry and Comparative Medicine Institute, North Carolina State University, 2620 Yarbrough Drive, Raleigh, NC, 27695, USA
| | - Joshua G Pierce
- Department of Chemistry and Comparative Medicine Institute, North Carolina State University, 2620 Yarbrough Drive, Raleigh, NC, 27695, USA
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22
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Mamedov VA, Mamedova VL, Khikmatova GZ, Korshin DE, Sinyashin OG. 5-(α-Halobenzyl)- and 5-Benzylidene-2,2-dimethyl-1,3-oxazolidin-4-ones in Synthesis of α-Hydroxy Acids. RUSS J GEN CHEM+ 2018. [DOI: 10.1134/s1070363217120088] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Xuan J, Cao X, Cheng X. Advances in heterocycle synthesis via [3+m]-cycloaddition reactions involving an azaoxyallyl cation as the key intermediate. Chem Commun (Camb) 2018; 54:5154-5163. [DOI: 10.1039/c8cc00787j] [Citation(s) in RCA: 66] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
This feature article highlights recent advances in heterocycle synthesis via [3+m]-cycloaddition reactions involving an azaoxyallyl cation as the key intermediate.
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Affiliation(s)
- Jun Xuan
- Department of Chemistry
- Anhui University
- Hefei
- China
| | - Xia Cao
- Department of Chemistry
- Anhui University
- Hefei
- China
| | - Xiao Cheng
- Department of Chemistry
- Anhui University
- Hefei
- China
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24
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Abstract
Covering: 2006 to 2017Actinomycetes have been, for decades, one of the most important sources for the discovery of new antibiotics with an important number of drugs and analogs successfully introduced in the market and still used today in clinical practice. The intensive antibacterial discovery effort that generated the large number of highly potent broad-spectrum antibiotics, has seen a dramatic decline in the large pharma industry in the last two decades resulting in a lack of new classes of antibiotics with novel mechanisms of action reaching the clinic. Whereas the decline in the number of new chemical scaffolds and the rediscovery problem of old known molecules has become a hurdle for industrial natural products discovery programs, new actinomycetes compounds and leads have continued to be discovered and developed to the preclinical stages. Actinomycetes are still one of the most important sources of chemical diversity and a reservoir to mine for novel structures that is requiring the integration of diverse disciplines. These can range from novel strategies to isolate species previously not cultivated, innovative whole cell screening approaches and on-site analytical detection and dereplication tools for novel compounds, to in silico biosynthetic predictions from whole gene sequences and novel engineered heterologous expression, that have inspired the isolation of new NPs and shown their potential application in the discovery of novel antibiotics. This review will address the discovery of antibiotics from actinomycetes from two different perspectives including: (1) an update of the most important antibiotics that have only reached the clinical development in the recent years despite their early discovery, and (2) an overview of the most recent classes of antibiotics described from 2006 to 2017 in the framework of the different strategies employed to untap novel compounds previously overlooked with traditional approaches.
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Affiliation(s)
- Olga Genilloud
- Fundación MEDINA, Avda Conocimiento 34, 18016 Granada, Spain.
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25
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Jiang S, Li K, Yan J, Shi K, Zhao C, Yang L, Zhong G. Synthetic Access to Oxazolidin-4-ones via Elimination/[3+2] Cycloaddition Reaction. J Org Chem 2017; 82:9779-9785. [DOI: 10.1021/acs.joc.7b00547] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Shengsheng Jiang
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Kai Li
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Jun Yan
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Kuangxi Shi
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Chengtao Zhao
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Limin Yang
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
| | - Guofu Zhong
- College of Materials, Chemistry & Chemical Engineering, Hangzhou Normal University, Hangzhou 310036, China
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26
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Michael P, Hansen KØ, Isaksson J, Andersen JH, Hansen E. A Novel Brominated Alkaloid Securidine A, Isolated from the Marine Bryozoan Securiflustra securifrons. Molecules 2017; 22:molecules22071236. [PMID: 28737700 PMCID: PMC6152195 DOI: 10.3390/molecules22071236] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 07/12/2017] [Accepted: 07/17/2017] [Indexed: 02/02/2023] Open
Abstract
A novel brominated alkaloid, Securidine A, was isolated from the cold water marine bryozoan Securiflustra securifrons. Securidine A was isolated using semi-preparative HPLC, and the structure was elucidated by spectroscopic methods. The isolated Securidine A was tested for cytotoxic, antibacterial, and anti-diabetic activities as well as for its potential for inhibition of biofilm formation. No significant biological activity was observed in the applied bioassays, thus expanded bioactivity profiling is required, in order to reveal any potential applications for Securidine A.
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Affiliation(s)
- Priyanka Michael
- MARBIO, UiT-The Arctic University of Norway, Breivika, Tromsø N-9037, Norway.
| | - Kine Ø Hansen
- MARBIO, UiT-The Arctic University of Norway, Breivika, Tromsø N-9037, Norway.
| | - Johan Isaksson
- Department of Chemistry, UiT-The Arctic University of Norway, Breivika, Tromsø N-9037, Norway.
| | - Jeanette H Andersen
- MARBIO, UiT-The Arctic University of Norway, Breivika, Tromsø N-9037, Norway.
| | - Espen Hansen
- MARBIO, UiT-The Arctic University of Norway, Breivika, Tromsø N-9037, Norway.
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27
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Covington BC, McLean JA, Bachmann BO. Comparative mass spectrometry-based metabolomics strategies for the investigation of microbial secondary metabolites. Nat Prod Rep 2017; 34:6-24. [PMID: 27604382 PMCID: PMC5214543 DOI: 10.1039/c6np00048g] [Citation(s) in RCA: 87] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Covering: 2000 to 2016The labor-intensive process of microbial natural product discovery is contingent upon identifying discrete secondary metabolites of interest within complex biological extracts, which contain inventories of all extractable small molecules produced by an organism or consortium. Historically, compound isolation prioritization has been driven by observed biological activity and/or relative metabolite abundance and followed by dereplication via accurate mass analysis. Decades of discovery using variants of these methods has generated the natural pharmacopeia but also contributes to recent high rediscovery rates. However, genomic sequencing reveals substantial untapped potential in previously mined organisms, and can provide useful prescience of potentially new secondary metabolites that ultimately enables isolation. Recently, advances in comparative metabolomics analyses have been coupled to secondary metabolic predictions to accelerate bioactivity and abundance-independent discovery work flows. In this review we will discuss the various analytical and computational techniques that enable MS-based metabolomic applications to natural product discovery and discuss the future prospects for comparative metabolomics in natural product discovery.
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Affiliation(s)
- Brett C Covington
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, TN 37235, USA.
| | - John A McLean
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, TN 37235, USA. and Center for Innovative Technology, Vanderbilt University, 5401 Stevenson Center, Nashville, TN 37235, USA
| | - Brian O Bachmann
- Department of Chemistry, Vanderbilt University, 7330 Stevenson Center, Nashville, TN 37235, USA.
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28
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Hassan SSU, Anjum K, Abbas SQ, Akhter N, Shagufta BI, Shah SAA, Tasneem U. Emerging biopharmaceuticals from marine actinobacteria. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2017; 49:34-47. [PMID: 27898308 DOI: 10.1016/j.etap.2016.11.015] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/19/2016] [Revised: 11/11/2016] [Accepted: 11/20/2016] [Indexed: 05/10/2023]
Abstract
Actinobacteria are quotidian microorganisms in the marine world, playing a crucial ecological role in the recycling of refractory biomaterials and producing novel secondary metabolites with pharmaceutical applications. Actinobacteria have been isolated from the huge area of marine organisms including sponges, tunicates, corals, mollusks, crabs, mangroves and seaweeds. Natural products investigation of the marine actinobacteria revealed that they can synthesize numerous natural products including alkaloids, polyketides, peptides, isoprenoids, phenazines, sterols, and others. These natural products have a potential to provide future drugs against crucial diseases like cancer, HIV, microbial and protozoal infections and severe inflammations. Therefore, marine actinobacteria portray as a pivotal resource for marine drugs. It is an upcoming field of research to probe a novel and pharmaceutically important secondary metabolites from marine actinobacteria. In this review, we attempt to summarize the present knowledge on the diversity, chemistry and mechanism of action of marine actinobacteria-derived secondary metabolites from 2007 to 2016.
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Affiliation(s)
| | - Komal Anjum
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Syed Qamar Abbas
- Faculty of Pharmacy, Gomal University D.I. Khan, K.P.K 29050, Pakistan
| | - Najeeb Akhter
- Ocean College, Zhejiang University, Hangzhou 310058, China
| | - Bibi Ibtesam Shagufta
- Department of Zoology, Kohat University of Science and Technology (KUST), K.P.K 26000, Pakistan
| | | | - Umber Tasneem
- Department of Microbiology, Kohat University of Science and Technology (KUST), K.P.K 26000, Pakistan
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29
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Jia Q, Du Z, Zhang K, Wang J. [3 + 2] Cycloaddition of aza-oxyallyl cations with aldehydes. Org Chem Front 2017. [DOI: 10.1039/c6qo00526h] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
We report here the [3 + 2] cycloaddition reactions of in situ-generated aza-oxyallyl cations with commercially available aldehydes.
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Affiliation(s)
- Qianfa Jia
- Allan H. Conney Laboratory for Anticancer Research. Guangdong University of Technology
- Guang Dong
- China
| | - Zhiyun Du
- Allan H. Conney Laboratory for Anticancer Research. Guangdong University of Technology
- Guang Dong
- China
| | - Kun Zhang
- Allan H. Conney Laboratory for Anticancer Research. Guangdong University of Technology
- Guang Dong
- China
| | - Jian Wang
- School of Pharmaceutical Sciences
- Tsinghua University
- Beijing
- China
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30
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Habbu P, Warad V, Shastri R, Madagundi S, Kulkarni VH. Antimicrobial metabolites from marine microorganisms. Chin J Nat Med 2016; 14:101-116. [PMID: 26968676 DOI: 10.1016/s1875-5364(16)60003-1] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2015] [Indexed: 12/19/2022]
Abstract
Marine ecological niches have recently been described as "particularly promising" sources for search of new antimicrobials to combat antibiotic-resistant strains of pathogenic microorganisms. Marine organisms are excellent sources for many industrial products, but they are partly explored. Over 30 000 compounds have been isolated from marine sources. Bacteria, fungi, and cyanobacteria obtained from various marine sources secret several industrially useful bioactive compounds, possessing antibacterial, antifungal, and antimycobacterial activities. Sustainable cultivation methods for promising marine organisms and biotechnological processes for selected compounds can be developed, along with the establishment of biosensors for monitoring the target compounds. The semisynthetic modifications of marine-based bioactive compounds produce their new derivatives, structural analogs and mimetics that could serve as novel lead compounds against resistant pathogens. The present review focuses on promising antimicrobial compounds isolated from marine microbes from 1991-2013.
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Affiliation(s)
- Prasanna Habbu
- Postgraduate Department of Pharmacognosy & Phytochemistry, SET's College of Pharmacy, Dharwad 580002, Karnataka, India.
| | - Vijayanand Warad
- Department of Pharmacognosy and Phytochemistry, Sridevi College of Pharmacy, Mangalore 575006, Karnataka, India
| | - Rajesh Shastri
- Postgraduate Department of Pharmacognosy & Phytochemistry, SET's College of Pharmacy, Dharwad 580002, Karnataka, India
| | - Smita Madagundi
- Postgraduate Department of Pharmacognosy & Phytochemistry, SET's College of Pharmacy, Dharwad 580002, Karnataka, India
| | - Venkatrao H Kulkarni
- Postgraduate Department of Pharmacology, SET's College of Pharmacy, Dharwad 580002, Karnataka, India
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31
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Acharya A, Montes K, Jeffrey CS. Access to 4-Oxazolidinones: A (3 + 2) Cycloaddition Approach. Org Lett 2016; 18:6082-6085. [DOI: 10.1021/acs.orglett.6b03069] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Arjun Acharya
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
| | - Karissa Montes
- Department of Chemistry, University of Nevada, Reno, Nevada 89557-0216, United States
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32
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Zhang K, Yang C, Yao H, Lin A. [3 + 2] Cycloaddition Reaction of in Situ Formed Azaoxyallyl Cations with Aldehydes: An Approach to Oxazolidin-4-ones. Org Lett 2016; 18:4618-21. [DOI: 10.1021/acs.orglett.6b02254] [Citation(s) in RCA: 60] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Kaifan Zhang
- State Key Laboratory of Natural
Medicines (SKLNM) and Department of Medicinal Chemistry, School of
Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Chi Yang
- State Key Laboratory of Natural
Medicines (SKLNM) and Department of Medicinal Chemistry, School of
Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Hequan Yao
- State Key Laboratory of Natural
Medicines (SKLNM) and Department of Medicinal Chemistry, School of
Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
| | - Aijun Lin
- State Key Laboratory of Natural
Medicines (SKLNM) and Department of Medicinal Chemistry, School of
Pharmacy, China Pharmaceutical University, Nanjing 210009, P. R. China
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33
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El Bouakher A, Le Goff R, Tasserie J, Lhoste J, Martel A, Comesse S. Synthesis of Oxazolidin-4-ones: Domino O-Alkylation/Aza-Michael/Intramolecular Retro-Claisen Condensation. Org Lett 2016; 18:2383-6. [DOI: 10.1021/acs.orglett.6b00851] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Abderrahman El Bouakher
- Normandie Université, UNIHAVRE, URCOM, 76600 Le Havre 25, Rue Philipe Lebon, BP 540, F-76600 Le Havre, France
| | - Ronan Le Goff
- Normandie Université, UNIHAVRE, URCOM, 76600 Le Havre 25, Rue Philipe Lebon, BP 540, F-76600 Le Havre, France
| | - Jordan Tasserie
- Normandie Université, UNIHAVRE, URCOM, 76600 Le Havre 25, Rue Philipe Lebon, BP 540, F-76600 Le Havre, France
| | - Jérôme Lhoste
- Université du Maine, IMMM, UMR 6283 CNRS, 72085 Le Mans, France
| | - Arnaud Martel
- Université du Maine, IMMM, UMR 6283 CNRS, 72085 Le Mans, France
| | - Sébastien Comesse
- Normandie Université, UNIHAVRE, URCOM, 76600 Le Havre 25, Rue Philipe Lebon, BP 540, F-76600 Le Havre, France
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34
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Conversion of carbon dioxide into 2-oxazolidinones and 2(3H)-oxazolones catalyzed by 2,2′,2″-terpyridine. Tetrahedron 2016. [DOI: 10.1016/j.tet.2016.01.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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35
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Zlotin SG, Kochetkov SV. C2-Symmetric diamines and their derivatives as promising organocatalysts for asymmetric synthesis. RUSSIAN CHEMICAL REVIEWS 2015. [DOI: 10.1070/rcr4562] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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36
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Lin KW, Maitraie D, Huang AM, Wang JP, Lin CN. Triterpenoids and an alkamide from Ganoderma tsugae. Fitoterapia 2015; 108:73-80. [PMID: 26598137 DOI: 10.1016/j.fitote.2015.11.003] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2015] [Revised: 11/09/2015] [Accepted: 11/11/2015] [Indexed: 01/08/2023]
Abstract
Ganoderma tsugae is a medicinal mushroom. In a continual study on the bioactive constituents of this fungus, a new lanostanoid, 3β-acetoxy-16α-hydroxy-24ξ-methyl-5α-lanosta-8,25-dien-21-oic acid, named tsugaric acid F (1) and a novel palmitamide, N-(3'α,4'β-dihydroxy-2'β-(hydroxymethyl)-1'β-(cyclobutyl)palmitamide (2) were isolated and characterized from the fruit bodies of G. tsugae, and three novel seco-lanostanoids, 3,4-seco-8α,9α-epoxy-5α-lanosta-21-oic acid 3,4 lactone (5), 3,4-seco-5β-lanosta-7,9(11),4(29)-trien-3,21-dioic acid-3-methyl ester (6), 3,4-seco-5β-lanosta-7,9(11),4(29)-trien-3,21-dioic acid (7), and a known compound, 3-oxo-5α-lanosta-8-en-21-oic acid (4) were prepared from 3. The structures of new compounds, 1, 2, 5-7 were determined by spectroscopic methods. Compounds 1 and 4 showed inhibitory effects on xanthine oxidase (XO) with an IC50 values of 313.3 ± 80.0 and 43.9 ± 29.9 μM, respectively when 7 exhibited potent inhibitory effect on superoxide anion generation in rat neutrophils stimulated with formyl-Met-Leu-Phe (fMLP)/cytochalasin B (CB) with an IC50 values of 1.3 ± 0.2 μM. Compounds 4-7 showed weak cytotoxic activities against PC3 cells. These results indicated that 4 and 7 may be used as cancer chemopreventive agents.
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Affiliation(s)
- Kai-Wei Lin
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - Dravidum Maitraie
- School of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan
| | - A-Mei Huang
- Graduate Institute of Clinical Medicine, College of Medicine, Kaohsiung Medical University, 80708, Taiwan
| | - Jih-Pyang Wang
- Department of Education and Research, Taichung Veterans General Hospital, Taichung 40705, Taiwan
| | - Chun-Nan Lin
- Faculty of Fragrance and Cosmetics, College of Pharmacy, Kaohsiung Medical University, Kaohsiung 80708, Taiwan; Department of Medical Research, Kaohsiung Medical University Chung-Ho Memorial Hospital, Kaohsiung 80708, Taiwan.
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37
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Nam SJ, Kauffman CA, Jensen PR, Moore CE, Rheingold AL, Fenical W. Actinobenzoquinoline and Actinophenanthrolines A–C, Unprecedented Alkaloids from a Marine Actinobacterium. Org Lett 2015; 17:3240-3. [DOI: 10.1021/acs.orglett.5b01387] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Sang-Jip Nam
- Center for Marine Biotechnology and
Biomedicine, Scripps Institution
of Oceanography, and ‡Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0204, United States
| | - Christopher A. Kauffman
- Center for Marine Biotechnology and
Biomedicine, Scripps Institution
of Oceanography, and ‡Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0204, United States
| | - Paul R. Jensen
- Center for Marine Biotechnology and
Biomedicine, Scripps Institution
of Oceanography, and ‡Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0204, United States
| | - Curtis E. Moore
- Center for Marine Biotechnology and
Biomedicine, Scripps Institution
of Oceanography, and ‡Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0204, United States
| | - Arnold L. Rheingold
- Center for Marine Biotechnology and
Biomedicine, Scripps Institution
of Oceanography, and ‡Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0204, United States
| | - William Fenical
- Center for Marine Biotechnology and
Biomedicine, Scripps Institution
of Oceanography, and ‡Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093-0204, United States
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38
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Smith SR, Fallan C, Taylor JE, McLennan R, Daniels DSB, Morrill LC, Slawin AMZ, Smith AD. Asymmetric Isothiourea-Catalysed Formal [3+2] Cycloadditions of Ammonium Enolates with Oxaziridines. Chemistry 2015; 21:10530-6. [PMID: 26073559 PMCID: PMC4531819 DOI: 10.1002/chem.201501271] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2015] [Indexed: 11/07/2022]
Abstract
A highly enantioselective Lewis base-catalysed formal [3+2] cycloaddition of ammonium enolates and oxaziridines to give stereodefined oxazolidin-4-ones in high yield is described. Employing an enantioenriched oxaziridine in this process leads to a matched/mis-matched effect with the isothiourea catalyst and allowed the synthesis of either syn- or anti-stereodefined oxazolidin-4-ones in high d.r., yield and ee. Additionally, the oxazolidin-4-one products have been derivatised to afford functionalised enantioenriched building blocks.
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Affiliation(s)
- Siobhan R Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Charlene Fallan
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - James E Taylor
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Ross McLennan
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - David S B Daniels
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Louis C Morrill
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Alexandra M Z Slawin
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK)
| | - Andrew D Smith
- EaStCHEM, School of Chemistry, University of St Andrews, North Haugh, St Andrews, KY16 9ST (UK).
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Shymanska NV, An IH, Guevara-Zuluaga S, Pierce JG. Rapid synthesis and antimicrobial activity of novel 4-oxazolidinone heterocycles. Bioorg Med Chem Lett 2015; 25:4887-4889. [PMID: 26099542 DOI: 10.1016/j.bmcl.2015.06.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2015] [Revised: 05/28/2015] [Accepted: 06/02/2015] [Indexed: 11/26/2022]
Abstract
The synoxazolidinone family of marine natural products bear an unusual 4-oxazolidinone heterocyclic core and promising antimicrobial activity against several strains of pathogenic bacteria. As part of our research program directed at the synthesis and chemical biology of this family of natural products we have developed a one-step method for the generation of variously substituted 4-oxazolidinone scaffolds from readily available materials. These studies revealed the importance of an electron deficient aromatic ring for antimicrobial activity and serve as the basis for future SAR studies around the 4-oxazolidinone core.
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Affiliation(s)
- Nataliia V Shymanska
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
| | - Il Hwan An
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA
| | - Sebastián Guevara-Zuluaga
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA; Department of Chemistry, University of Puerto Rico, Río Piedras Campus, San Juan, PR 00931, USA
| | - Joshua G Pierce
- Department of Chemistry, North Carolina State University, Raleigh, NC 27695, USA.
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Trepos R, Cervin G, Hellio C, Pavia H, Stensen W, Stensvåg K, Svendsen JS, Haug T, Svenson J. Antifouling compounds from the sub-arctic ascidian Synoicum pulmonaria: synoxazolidinones A and C, pulmonarins A and B, and synthetic analogues. JOURNAL OF NATURAL PRODUCTS 2014; 77:2105-2113. [PMID: 25181423 DOI: 10.1021/np5005032] [Citation(s) in RCA: 58] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
The current study describes the antifouling properties of four members belonging to the recently discovered synoxazolidinone and pulmonarin families, isolated from the sub-Arctic sessile ascidian Synoicum pulmonaria collected off the Norwegian coast. Four simplified synthetic analogues were also prepared and included in the study. Several of the studied compounds displayed MIC values in the micro-nanomolar range against 16 relevant marine species involved in both the micro- and macrofouling process. Settlement studies on Balanus improvisus cyprids indicated a deterrent effect and a low toxicity for selected compounds. The two synoxazolidinones displayed broad activity and are shown to be among the most active natural antifouling bromotyrosine derivatives described. Synoxazolidinone C displayed selected antifouling properties comparable to the commercial antifouling product Sea-Nine-211. The pulmonarins prevented the growth of several bacterial strains at nanomolar concentrations but displayed a lower activity toward microalgae and no effect on barnacles. The linear and cyclic synthetic peptidic mimics also displayed potent antifouling activities mainly directed against bacterial adhesion and growth.
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Affiliation(s)
- Rozenn Trepos
- School of Biological Sciences, University of Portsmouth , Portsmouth PO1 2DY, U.K
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Shymanska NV, An IH, Pierce JG. A Rapid Synthesis of 4-Oxazolidinones: Total Synthesis of Synoxazolidinones A and B. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201402310] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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42
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Shymanska NV, An IH, Pierce JG. A Rapid Synthesis of 4-Oxazolidinones: Total Synthesis of Synoxazolidinones A and B. Angew Chem Int Ed Engl 2014; 53:5401-4. [DOI: 10.1002/anie.201402310] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/11/2014] [Revised: 03/06/2014] [Indexed: 01/05/2023]
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43
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Subramani R, Aalbersberg W. Culturable rare Actinomycetes: diversity, isolation and marine natural product discovery. Appl Microbiol Biotechnol 2013; 97:9291-321. [DOI: 10.1007/s00253-013-5229-7] [Citation(s) in RCA: 116] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2013] [Revised: 08/29/2013] [Accepted: 09/02/2013] [Indexed: 11/30/2022]
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Yang S, Sun W, Tang C, Jin L, Zhang F, Li Z. Phylogenetic diversity of actinobacteria associated with soft coral Alcyonium gracllimum and stony coral Tubastraea coccinea in the East China Sea. MICROBIAL ECOLOGY 2013; 66:189-199. [PMID: 23503990 DOI: 10.1007/s00248-013-0205-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2012] [Accepted: 02/21/2013] [Indexed: 06/01/2023]
Abstract
Actinobacteria are widely distributed in the marine environment. To date, few studies have been performed to explore the coral-associated Actinobacteria, and little is known about the diversity of coral-associated Actinobacteria. In this study, the actinobacterial diversity associated with one soft coral Alcyonium gracllimum and one stony coral Tubastraea coccinea collected from the East China Sea was investigated using both culture-independent and culture-dependent approaches. A total of 19 actinobacterial genera were detected in these two corals, among which nine genera (Corynebacterium, Dietzia, Gordonia, Kocuria, Microbacterium, Micrococcus, Mycobacterium, Streptomyces, and Candidatus Microthrix) were common, three genera (Cellulomonas, Dermatophilus, and Janibacter) were unique to the soft coral, and seven genera (Brevibacterium, Dermacoccus, Leucobacter, Micromonospora, Nocardioides, Rhodococcus, and Serinicoccus) were unique to the stony coral. This finding suggested that highly diverse Actinobacteria were associated with different types of corals. In particular, five actinobacterial genera (Cellulomonas, Dermacoccus, Gordonia, Serinicoccus, and Candidatus Microthrix) were recovered from corals for the first time, extending the known diversity of coral-associated Actinobacteria. This study shows that soft and stony corals host diverse Actinobacteria and can serve as a new source of marine actinomycetes.
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Affiliation(s)
- Shan Yang
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism and School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, 800 Dongchuan Road, Shanghai, 200240, People's Republic of China
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Dong S, Liu X, Zhu Y, He P, Lin L, Feng X. Organocatalytic Oxyamination of Azlactones: Kinetic Resolution of Oxaziridines and Asymmetric Synthesis of Oxazolin-4-ones. J Am Chem Soc 2013; 135:10026-9. [DOI: 10.1021/ja404379n] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Shunxi Dong
- Key Laboratory
of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiaohua Liu
- Key Laboratory
of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Yin Zhu
- Key Laboratory
of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Peng He
- Key Laboratory
of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Lili Lin
- Key Laboratory
of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
| | - Xiaoming Feng
- Key Laboratory
of Green Chemistry and Technology, Ministry
of Education, College of Chemistry, Sichuan University, Chengdu 610064, P. R. China
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Sun W, Peng C, Zhao Y, Li Z. Functional gene-guided discovery of type II polyketides from culturable actinomycetes associated with soft coral Scleronephthya sp. PLoS One 2012; 7:e42847. [PMID: 22880121 PMCID: PMC3413676 DOI: 10.1371/journal.pone.0042847] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2012] [Accepted: 07/12/2012] [Indexed: 12/05/2022] Open
Abstract
Compared with the actinomycetes in stone corals, the phylogenetic diversity of soft coral-associated culturable actinomycetes is essentially unexplored. Meanwhile, the knowledge of the natural products from coral-associated actinomycetes is very limited. In this study, thirty-two strains were isolated from the tissue of the soft coral Scleronephthya sp. in the East China Sea, which were grouped into eight genera by 16S rDNA phylogenetic analysis: Micromonospora, Gordonia, Mycobacterium, Nocardioides, Streptomyces, Cellulomonas, Dietzia and Rhodococcus. 6 Micromonospora strains and 4 Streptomyces strains were found to be with the potential for producing aromatic polyketides based on the analysis of KSα (ketoacyl-synthase) gene in the PKS II (type II polyketides synthase) gene cluster. Among the 6 Micromonospora strains, angucycline cyclase gene was amplified in 2 strains (A5-1 and A6-2), suggesting their potential in synthesizing angucyclines e.g. jadomycin. Under the guidance of functional gene prediction, one jadomycin B analogue (7b, 13-dihydro-7-O-methyl jadomycin B) was detected in the fermentation broth of Micromonospora sp. strain A5-1. This study highlights the phylogenetically diverse culturable actinomycetes associated with the tissue of soft coral Scleronephthya sp. and the potential of coral-derived actinomycetes especially Micromonospora in producing aromatic polyketides.
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Affiliation(s)
- Wei Sun
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism & School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Chongsheng Peng
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Yunyu Zhao
- School of Pharmacy, Shanghai Jiao Tong University, Shanghai, People's Republic of China
| | - Zhiyong Li
- Marine Biotechnology Laboratory, State Key Laboratory of Microbial Metabolism & School of Life Sciences and Biotechnology, Shanghai Jiao Tong University, Shanghai, People's Republic of China
- * E-mail:
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Abstract
AbstractSecondary metabolites obtained from Actinomycetales provide a potential source of many novel compounds with antibacterial, antitumour, antifungal, antiviral, antiparasitic and other properties. The majority of these compounds are widely used as medicines for combating multidrug-resistant Gram-positive and Gram-negative bacterial strains. Members of the genus Streptomyces are profile producers of previously-known secondary metabolites. Actinomycetes have been isolated from terrestrial soils, from the rhizospheres of plant roots, and recently from marine sediments. This review demonstrates the diversity of secondary metabolites produced by actinomycete strains with respect to their chemical structure, biological activity and origin. On the basis of this diversity, this review concludes that the discovery of new bioactive compounds will continue to pose a great challenge for scientists.
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Svenson J. MabCent: Arctic marine bioprospecting in Norway. PHYTOCHEMISTRY REVIEWS : PROCEEDINGS OF THE PHYTOCHEMICAL SOCIETY OF EUROPE 2012; 12:567-578. [PMID: 24078803 PMCID: PMC3777186 DOI: 10.1007/s11101-012-9239-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/08/2011] [Accepted: 05/12/2012] [Indexed: 05/24/2023]
Abstract
The deep waters surrounding the coastline of the northern parts of Norway represent an exciting biotope for marine exploration. Dark and cold Arctic water generates a hostile environment where the ability to adapt is crucial to survival. These waters are nonetheless bountiful and a diverse plethora of marine organisms thrive in these extreme conditions, many with the help of specialised chemical compounds. In comparison to warmer, perhaps more inviting shallower tropical waters, the Arctic region has not been as thoroughly investigated. MabCent is a Norwegian initiative based in Tromsø that aims to change this. Since 2007, scientists within MabCent have focussed their efforts on the study of marine organisms inhabiting the Arctic waters with the long term goal of novel drug discovery and development. The activities of MabCent are diverse and range from sampling the Arctic ice shelf to the chemical synthesis of promising secondary metabolites discovered during the screening process. The current review will present the MabCent pipeline from isolation to identification of new bioactive marine compounds via an extensive screening process. An overview of the main activities will be given with particular focus on isolation strategies, bioactivity screening and structure determination. Pitfalls, hard earned lessons and the results so far are also discussed.
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Affiliation(s)
- Johan Svenson
- SmallStruct, Department of Chemistry, University of Tromsø, Breivika, 9037 Tromsø, Norway
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Kim DG, Moon K, Kim SH, Park SH, Park S, Lee SK, Oh KB, Shin J, Oh DC. Bahamaolides A and B, antifungal polyene polyol macrolides from the marine actinomycete Streptomyces sp. JOURNAL OF NATURAL PRODUCTS 2012; 75:959-967. [PMID: 22574670 DOI: 10.1021/np3001915] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Bahamaolides A and B (1 and 2), two new 36-membered macrocyclic lactones, were isolated from the culture of the marine actinomycete Streptomyces sp. derived from a sediment sample collected at North Cat Cay in the Bahamas. The planar structures of 1 and 2, bearing a hexaenone and nine consecutive skipped hydroxy groups, were determined by 1D and 2D NMR, mass, IR, and UV spectra. The absolute configurations of the bahamaolides were established by combined multistep chemical reactions and spectroscopic analysis. Bahamaolide A displayed significant inhibitory activity against Candida albicans isocitrate lyase and antifungal activity against various pathogenic fungi.
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Affiliation(s)
- Dong-Gyu Kim
- Natural Products Research Institute, College of Pharmacy, Seoul National University , 1 Gwanak-ro, Gwanak-gu, Seoul 151-742, Republic of Korea
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50
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Jaiganesh R, Sampath Kumar NS. Marine bacterial sources of bioactive compounds. ADVANCES IN FOOD AND NUTRITION RESEARCH 2012; 65:389-408. [PMID: 22361201 DOI: 10.1016/b978-0-12-416003-3.00025-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Thousands of novel compounds have been isolated from various marine bacteria and tested for pharmacological properties, many of which are commercially available. Many more are being tested as potential bioactive compound at the preclinical and clinical stages. The growing interest in marine-derived antiviral compounds, along with the development of new technology in marine cultures and extraction, will significantly expedite the current exploration of the marine environment for compounds with significant pharmacological applications, which will continue to be a promising strategy and new trend for modern medicine. Marine actinomycetes and cyanobacteria are a prolific but underexploited source for the discovery of novel secondary metabolites.
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Affiliation(s)
- R Jaiganesh
- Department of Biotechnology, School of Bioengineering, SRM University, Tamil Nadu, India.
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