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Pinheiro J, Lyons T, Heras VL, Recio MV, Gahan CG, O'Sullivan TP. Investigation of halogenated furanones as inhibitors of quorum sensing-regulated bioluminescence in Vibrio harveyi. Future Med Chem 2023; 15:317-332. [PMID: 36927104 DOI: 10.4155/fmc-2022-0235] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/18/2023] Open
Abstract
Aim: Vibrio harveyi is a Gram-negative marine bacterium that is a model system in the study of quorum sensing (QS). V. harveyi uses multichannel QS, mediated by three signaling molecules. The aim of this study was to synthesize and screen a diverse series of furanones for their potential to inhibit V. harveyi quorum sensing. Materials & methods: A library of halogenated furanones was prepared and derivatized using standard Pd-mediated coupling reactions and subsequently evaluated for their effects on V. harveyi bioluminescence. Results & conclusion: Several furanones inhibited QS-regulated bioluminescence, with gem-dichlorofuranone and tribromofuranone compounds proving especially effective. Importantly, a number of compounds were effective inhibitors of V. harveyi bioluminescence but did not have an impact on bacterial growth.
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Affiliation(s)
- Jorge Pinheiro
- School of Microbiology, University College Cork, Cork, T12 YN60, Ireland
- APC Microbiome Ireland, University College Cork, Cork, T12 YN60, Ireland
| | - Thérèse Lyons
- School of Pharmacy, University College Cork, Cork, T12 YN60, Ireland
| | - Vanessa Las Heras
- School of Microbiology, University College Cork, Cork, T12 YN60, Ireland
- APC Microbiome Ireland, University College Cork, Cork, T12 YN60, Ireland
| | - Miguel Villoria Recio
- School of Microbiology, University College Cork, Cork, T12 YN60, Ireland
- APC Microbiome Ireland, University College Cork, Cork, T12 YN60, Ireland
| | - Cormac Gm Gahan
- School of Microbiology, University College Cork, Cork, T12 YN60, Ireland
- APC Microbiome Ireland, University College Cork, Cork, T12 YN60, Ireland
- School of Pharmacy, University College Cork, Cork, T12 YN60, Ireland
| | - Timothy P O'Sullivan
- School of Pharmacy, University College Cork, Cork, T12 YN60, Ireland
- School of Chemistry, University College Cork, Cork, T12 YN60, Ireland
- Analytical & Biological Chemistry Research Facility, University College Cork, Cork, T12 YN60, Ireland
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Leonardou VK, Doudoumis E, Tsormpatsidis E, Vysini E, Papanikolopoulos T, Papasotiropoulos V, Lamari FN. Quality Traits, Volatile Organic Compounds, and Expression of Key Flavor Genes in Strawberry Genotypes over Harvest Period. Int J Mol Sci 2021; 22:13499. [PMID: 34948297 DOI: 10.3390/ijms222413499] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2021] [Revised: 12/09/2021] [Accepted: 12/13/2021] [Indexed: 11/17/2022] Open
Abstract
Six strawberry genotypes were examined for fruit yield and size, important chemical traits (sugars, phenolics, anthocyanins, ascorbic acid, volatiles) and antioxidant properties (ferric reducing power). In addition, we determined the expression of genes and transcription factors (SAAT, FaNES1, FaFAD1, FaEGS2, FaEOBII and FaMYB10) controlling the main flavor and aroma traits, and finally evaluated the effect of the genotype and harvest time on the examined chemical and genetic factors, as well as their intercorrelations. The commercial varieties 'Fortuna', 'Victory', 'Calderon', 'Rociera', and two advanced selections Ber22/6 and Ber23/3 were cultivated under the same conditions at Berryplasma World Ltd. plantations (Varda, Ilia, Region of Western Greece). Strawberries were harvested at three different time points over the main harvest period in Greece, i.e., early March (T1), late March (T2) and late April (T3). 'Fortuna' exhibited the highest early and total yield, while 'Calderon', the highest average berry weight. General Linear Model repeated measures ANOVA demonstrated that the interaction of the genotype and harvest time was significant (p < 0.001) on all tested quality attributes and gene expression levels, showing that each genotype behaves differently throughout the harvest period. Exceptions were observed for: (a) the volatile anhydrides, fatty acids, aromatics and phenylpropanoids (all were greatly affected by the harvest time), and (b) lactones, furaneol and FaEGS2 that were affected only by the genotype. We observed significant intercorrelations among those factors, e.g., the positive correlation of FaFAD1 expression with decalactone and nerolidol, of SAAT with furaneol, trans-cinnamic acid and phenylpropanoids, and of FaEGS2 with decalactone and FaFAD1. Moreover, a strong positive correlation between SAAT and FaMYB10 and a moderate negative one between SAAT and glucose were also detected. Those correlations can be further investigated to reveal potential markers for strawberry breeding. Overall, our study contributes to a better understanding of strawberry physiology, which would facilitate breeding efforts for the development of new strawberry varieties with superior qualitative traits.
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Lyons T, Gahan CG, O'Sullivan TP. Structure-activity relationships of furanones, dihydropyrrolones and thiophenones as potential quorum sensing inhibitors. Future Med Chem 2020; 12:1925-43. [PMID: 33094640 DOI: 10.4155/fmc-2020-0244] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Since their initial isolation from the marine alga Delisea pulchra, bromofuranones have been investigated as potential inhibitors of quorum sensing (QS) in various bacterial strains. QS is an important mechanism by which bacteria co-ordinate their molecular response to the environment. QS is intrinsically linked to bacterial antibiotic resistance. Inspired by nature, chemists have developed a wide variety of synthetic analogs in an effort to elucidate the structure-activity relationships of these compounds, and to ultimately develop novel antimicrobial agents. In this work, we describe advances in this field while paying particular attention to apparent structure-activity relationships. This review is organized according to the main ring systems under investigation, namely furanones, dihydropyrrolones and thiophenones.
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Rodríguez-López P, Barrenengoa AE, Pascual-Sáez S, Cabo ML. Efficacy of Synthetic Furanones on Listeria monocytogenes Biofilm Formation. Foods 2019; 8:E647. [PMID: 31817522 PMCID: PMC6963563 DOI: 10.3390/foods8120647] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2019] [Revised: 12/02/2019] [Accepted: 12/04/2019] [Indexed: 02/07/2023] Open
Abstract
Furanones are analogues of acylated homoserine lactones with proven antifouling activity in both Gram-positive and Gram-negative bacteria though the interference of various quorum sensing pathways. In an attempt to find new strategies to prevent and control Listeria monocytogenes biofilm formation on stainless steel (SS) surfaces, different concentrations of six synthetic furanones were applied on biofilms formed by strains isolated from food, environmental, and clinical sources grown onto AISI 316 SS coupons. Among the furanones tested, (Z-)-4-Bromo-5-(bromomethylene)-2(5H)-furanone and 3,4-Dichloro-2(5H)-furanone significantly (p < 0.05) reduced the adhesion capacity (>1 log CFU cm-2) in 24 h treated biofilms. Moreover, individually conducted experiments demonstrated that (Z-)-4-Bromo-5-(bromomethylene)-2(5H)-furanone was able to not only significantly (p < 0.05) prevent L. monocytogenes adhesion but also to reduce the growth rate of planktonic cells up to 48 h in a dose-dependent manner. LIVE/DEAD staining followed by epifluorescence microscopy visualisation confirmed these results show an alteration of the structure of the biofilm in furanone-treated samples. Additionally, it was demonstrated that 20 µmol L-1 of 3,4-Dichloro-2(5H)-furanone dosed at 0, 24 and 96 h was able to maintain a lower level of adhered cells (>1 log CFU cm-2; p < 0.05). Since furanones do not pose a selective pressure on bacteria, these results represent an appealing novel strategy for the prevention of L. monocytogenes biofilm grown onto SS.
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Affiliation(s)
- Pedro Rodríguez-López
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
- Department of Food and Drug, Università di Parma, Strada del Taglio 10, 43126 Parma, Italy
| | - Andrea Emparanza Barrenengoa
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
| | - Sergio Pascual-Sáez
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
| | - Marta López Cabo
- Laboratory of Microbiology and Technology of Marine Products (MICROTEC), Instituto de Investigaciones Marinas (IIM-CSIC), C/Eduardo Cabello 6, 36208 Vigo, Spain; (P.R.-L.); (A.E.B.); (S.P.-S.)
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Singh PK, Silakari O. The Current Status of O-Heterocycles: A Synthetic and Medicinal Overview. ChemMedChem 2018; 13:1071-1087. [PMID: 29603634 DOI: 10.1002/cmdc.201800119] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2018] [Revised: 03/23/2018] [Indexed: 12/20/2022]
Abstract
O-Heterocycles have been explored in the field of medicinal chemistry for a long time, but their significance has not been duly recognised and they are often shunned in favour of N-heterocycles. The design of bioactive molecules for nearly every pathophysiological condition is primarily focused on novel N-heterocycles. The main reasons for such bias include the ease of synthesis and possible mimicking of physiological molecules by N-heterocycles. But considering only this criterion rarely provides breakthrough molecules for a given disease condition, and instead the risks of toxicity or side effects are increased with such molecules. On the other hand, owing to improved synthetic feasibility, O-heterocycles have established themselves as equally potent lead molecules for a wide range of pathophysiological conditions. In the last decade there have been hundreds of reports validating the fact that equally potent molecules can be designed and developed by using O-heterocycles, and these are also expected to have comparably low toxicity. Even so, researchers tend to remain biased toward the use of N-heterocycles over O-heterocycles. Thus, this review provides a critical analysis of the synthesis and medicinal attributes of O-heterocycles, such as pyrones, oxazolones, furanones, oxetanes, oxazolidinones, and dioxolonones, and others, reported in the last five years, underlining the need for and the advantages guiding researchers toward them.
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Affiliation(s)
- Pankaj Kumar Singh
- Molecular Modelling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Om Silakari
- Molecular Modelling Lab (MML), Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
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Masi M, Maddau L, Linaldeddu BT, Cimmino A, D'Amico W, Scanu B, Evidente M, Tuzi A, Evidente A. Bioactive Secondary Metabolites Produced by the Oak Pathogen Diplodia corticola. J Agric Food Chem 2016; 64:217-225. [PMID: 26671545 DOI: 10.1021/acs.jafc.5b05170] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Three new lactones and a new fatty acid ester, named sapinofuranones C and D, diplopyrone B, and diplobifuranylone C, respectively, were isolated from Diplodia corticola, together with sphaeropsidins A and C, diplopyrone, diplobifuranylones A and B, diplofuranone A, and the (S,S)-enantiomer of sapinofuranone B. Sapinofuranones C and D, diplopyrone B, and diplobifuranylone C were characterized as (5S)-5-((1,S-1,6-dihydroxyhexa-2,4-dienyl)-dihydrofuran-2-one, 4,5-dihydroxy-deca-6,8-dienoic acid methyl ester, (5S)-5-hydroxy-6-(penta-1,3-dienyl)-5,6-dihydro-pyran-2-one, and 5'-((1R)-1-hydroxyethyl)-2',5'-dihydro-2H-[2,2']bifuranyl-5-one by spectroscopic and chemical methods, respectively. The relative configuration of sapinofuranone C was assigned by X-ray diffraction analysis, whereas its absolute configuration was determined by applying the advanced Mosher's method to its 11-O-p-bromobenzoyl derivative. The same method was used to assign the absolute configuration to C-5 of diplopyrone B and to that of the hydroxyethyl of the side chain of diplobifuranylone C, respectively. The metabolites isolated were tested at 1 mg/mL on leaves of cork oak, grapevine cv. 'Cannonau', and tomato using the leaf puncture assay. They were also tested on tomato cuttings at 0.2, 0.1, and 0.05 mg/mL. Each compound was tested for zootoxic activity on Artemia salina L. larvae. The efficacy of sapinofuranone C and diplopyrone B on three plant pathogens, namely, Athelia rolfsii, Fusarium avenaceum, and Phytophthora nicotianae was also evaluated. In all phytotoxic assays only diplopyrone B was found to be active. It also showed strong inhibition on the vegetative growth of A. rolfsii and P. nicotianae. All metabolites were inactive in the assay performed for the zootoxic activity (A. salina) even at the highest concentration used (200 μg/mL). Diplopyrone B showed a promising antioomycete activity for the control of Phytophthora spp. also taking into account the absence of zootoxic activity.
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Affiliation(s)
- Marco Masi
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II , Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Lucia Maddau
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Sassari , Viale Italia 39, 07100 Sassari, Italy
| | - Benedetto Teodoro Linaldeddu
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Sassari , Viale Italia 39, 07100 Sassari, Italy
| | - Alessio Cimmino
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II , Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Wanda D'Amico
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II , Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Bruno Scanu
- Dipartimento di Agraria, Sezione di Patologia Vegetale ed Entomologia, Università degli Studi di Sassari , Viale Italia 39, 07100 Sassari, Italy
| | - Marco Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II , Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Angela Tuzi
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II , Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
| | - Antonio Evidente
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II , Complesso Universitario Monte Sant'Angelo, Via Cintia 4, 80126 Napoli, Italy
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Wijeratne EMK, Xu Y, Arnold AE, Gunatilaka AAL. Pulvinulin A, graminin C, and cis-gregatin B--new natural furanones from Pulvinula sp. 11120, a fungal endophyte of Cupressus arizonica. Nat Prod Commun 2015; 10:107-111. [PMID: 25920231 PMCID: PMC4682198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/04/2023] Open
Abstract
Three new natural furanones, pulvinulin A (1), graminin C (2), and cis-gregatin B (3), together with the known fungal metabolites, graminin B (4) and 10-norparvulenone (5), were isolated from Pulvinula sp. 11120, an endophytic fungal strain occurring in healthy foliage of Cupressus arizonica (Arizona cypress). The structures of 1 and 2 were elucidated by the analysis of their spectroscopic data and chemical interconversions, and that of 3 was determined by comparison with data for synthetic cis-gregatin B. Comparison of spectroscopic data of 4 and 5 with those reported identified them as graminin B and 10-norparvulenone, respectively. Metabolites 1-4 exhibited antibacterial activity against E. coli.
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Affiliation(s)
- E. M. Kithsiri Wijeratne
- Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706-6800, USA
| | - Yaming Xu
- Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706-6800, USA
| | - A. Elizabeth Arnold
- School of Plant Sciences, College of Agriculture and Life Sciences, University of Arizona, Tucson, Arizona 85721-0036, USA
| | - A. A. Leslie Gunatilaka
- Southwest Center for Natural Products Research and Commercialization, School of Natural Resources and the Environment, College of Agriculture and Life Sciences, The University of Arizona, 250 E. Valencia Road, Tucson, Arizona 85706-6800, USA
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Gupton JT, Telang N, Banner EJ, Kluball EJ, Hall KE, Finzel KL, Jia X, Bates SR, Welden RS, Giglio BC, Eaton JE, Barelli PJ, Firich LT, Stafford JA, Coppock MB, Worrall EF, Kanters RP, Keertikar K, Osterman R. The application of (Z)-3-aryl-3-haloenoic acids to the synthesis of (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones. Tetrahedron 2010; 66:9113-9122. [PMID: 21135918 PMCID: PMC2997076 DOI: 10.1016/j.tet.2010.09.080] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Studies directed at the synthesis of (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones from (Z)-3-aryl-3-haloenoic acids are described. The successful strategy relies on the preparation of (Z)-3-aryl-3-haloenoic acids from acetophenones through the corresponding (Z)-3-aryl-3-haloenals and the conversion of the (Z)-3-aryl-3-haloenoic acids to (Z)-5-benzylidene-4-aryl-5H-furan-2-ones. The furanones were subsequently treated with primary amines and dehydrated to the corresponding (Z)-5-benzylidene-4-arylpyrrol-2(5H)-ones.
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Affiliation(s)
- John T. Gupton
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Nakul Telang
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Edith J. Banner
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Emily J. Kluball
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Kayleigh E. Hall
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Kara L. Finzel
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Xin Jia
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Spencer R. Bates
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - R. Scott Welden
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Benjamin C. Giglio
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - James E. Eaton
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Peter J. Barelli
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Lauren T. Firich
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - John A. Stafford
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Matthew B. Coppock
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Eric F. Worrall
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Rene P.F. Kanters
- Department of Chemistry, University of Richmond, Richmond, VA 23173, USA
| | - Kerry Keertikar
- Merck Research Labs, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA
| | - Rebecca Osterman
- Merck Research Labs, 2015 Galloping Hill Road, Kenilworth, NJ 07033, USA
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