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Pasdaran A, Zare M, Hamedi A, Hamedi A. A Review of the Chemistry and Biological Activities of Natural Colorants, Dyes, and Pigments: Challenges, and Opportunities for Food, Cosmetics, and Pharmaceutical Application. Chem Biodivers 2023; 20:e202300561. [PMID: 37471105 DOI: 10.1002/cbdv.202300561] [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: 04/19/2023] [Revised: 07/17/2023] [Accepted: 07/20/2023] [Indexed: 07/21/2023]
Abstract
Natural pigments are important sources for the screening of bioactive lead compounds. This article reviewed the chemistry and therapeutic potentials of over 570 colored molecules from plants, fungi, bacteria, insects, algae, and marine sources. Moreover, related biological activities, advanced extraction, and identification approaches were reviewed. A variety of biological activities, including cytotoxicity against cancer cells, antioxidant, anti-inflammatory, wound healing, anti-microbial, antiviral, and anti-protozoal activities, have been reported for different pigments. Considering their structural backbone, they were classified as naphthoquinones, carotenoids, flavonoids, xanthones, anthocyanins, benzotropolones, alkaloids, terpenoids, isoprenoids, and non-isoprenoids. Alkaloid pigments were mostly isolated from bacteria and marine sources, while flavonoids were mostly found in plants and mushrooms. Colored quinones and xanthones were mostly extracted from plants and fungi, while colored polyketides and terpenoids are often found in marine sources and fungi. Carotenoids are mostly distributed among bacteria, followed by fungi and plants. The pigments isolated from insects have different structures, but among them, carotenoids and quinone/xanthone are the most important. Considering good manufacturing practices, the current permitted natural colorants are: Carotenoids (canthaxanthin, β-carotene, β-apo-8'-carotenal, annatto, astaxanthin) and their sources, lycopene, anthocyanins, betanin, chlorophyllins, spirulina extract, carmine and cochineal extract, henna, riboflavin, pyrogallol, logwood extract, guaiazulene, turmeric, and soy leghemoglobin.
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Affiliation(s)
- Ardalan Pasdaran
- Department of Pharmacognosy, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
- Medicinal Plants Processing Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Maryam Zare
- Department of Pharmacognosy, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
- Student research committee, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Azar Hamedi
- School of Agriculture, Shiraz University, Shiraz, Iran
| | - Azadeh Hamedi
- Department of Pharmacognosy, School of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran
- Medicinal Plants Processing Research Center, Shiraz University of Medical Sciences, Shiraz, Iran
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Elmaidomy AH, Shady NH, Abdeljawad KM, Elzamkan MB, Helmy HH, Tarshan EA, Adly AN, Hussien YH, Sayed NG, Zayed A, Abdelmohsen UR. Antimicrobial potentials of natural products against multidrug resistance pathogens: a comprehensive review. RSC Adv 2022; 12:29078-29102. [PMID: 36320761 PMCID: PMC9558262 DOI: 10.1039/d2ra04884a] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2022] [Accepted: 10/03/2022] [Indexed: 11/07/2022] Open
Abstract
Antibiotic resistance is one of the critical issues, describing a significant social health complication globally. Hence, the discovery of novel antibiotics has acquired an increased attention particularly against drug-resistant pathogens. Natural products have served as potent therapeutics against pathogenic bacteria since the glorious age of antibiotics of the mid 20th century. This review outlines the various mechanistic candidates for dealing with multi-drug resistant pathogens and explores the terrestrial phytochemicals isolated from plants, lichens, insects, animals, fungi, bacteria, mushrooms, and minerals with reported antimicrobial activity, either alone or in combination with conventional antibiotics. Moreover, newly established tools are presented, including prebiotics, probiotics, synbiotics, bacteriophages, nanoparticles, and bacteriocins, supporting the progress of effective antibiotics to address the emergence of antibiotic-resistant infectious bacteria. Therefore, the current article may uncover promising drug candidates that can be used in drug discovery in the future.
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Affiliation(s)
- Abeer H Elmaidomy
- Department of Pharmacognosy, Faculty of Pharmacy, Beni-Suef University Beni-Suef 62511 Egypt
| | - Nourhan Hisham Shady
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | | | | | - Hussein Hykel Helmy
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | - Emad Ashour Tarshan
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | - Abanoub Nabil Adly
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | | | - Nesma Gamal Sayed
- Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
| | - Ahmed Zayed
- Department of Pharmacognosy, College of Pharmacy, Tanta University, Elguish Street (Medical Campus) Tanta 31527 Egypt
- Institute of Bioprocess Engineering, Technical University of Kaiserslautern Gottlieb-Daimler-Str. 49 Kaiserslautern 67663 Germany
| | - Usama Ramadan Abdelmohsen
- Department of Pharmacognosy, Faculty of Pharmacy, Deraya University, Universities Zone New Minia 61111 Egypt
- Department of Pharmacognosy, Faculty of Pharmacy, Minia University Minia 61519 Egypt
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3
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Antimicrobial Activity of Lactones. Antibiotics (Basel) 2022; 11:antibiotics11101327. [PMID: 36289985 PMCID: PMC9598898 DOI: 10.3390/antibiotics11101327] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2022] [Revised: 09/23/2022] [Accepted: 09/27/2022] [Indexed: 11/17/2022] Open
Abstract
The development of bacterial resistance to antibiotics and the consequent lack of effective therapy is one of the biggest problems in modern medicine. A consequence of these processes is an urgent need to continuously design and develop novel antimicrobial agents. Among the compounds showing antimicrobial potential, lactones are a group to explore. For centuries, their antimicrobial activities have been used in folk medicine. Currently, novel lactone compounds are continuously described in the literature. Some of those structures exhibit high antimicrobial potential and some are an inspiration for design and synthesis of future drugs. This paper describes recent developments on antimicrobial lactones with smaller ring sizes, up to seven membered ε-lactones. Their isolation from natural sources, chemical synthesis, synergistic activity with antibiotics, and effects on quorum sensing are presented herein.
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Moussa AY, Fayez S, Xiao H, Xu B. New insights into antimicrobial and antibiofilm effects of edible mushrooms. Food Res Int 2022; 162:111982. [DOI: 10.1016/j.foodres.2022.111982] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Revised: 08/20/2022] [Accepted: 09/26/2022] [Indexed: 11/28/2022]
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Lee S, Yu JS, Lee SR, Kim KH. Non-peptide secondary metabolites from poisonous mushrooms: overview of chemistry, bioactivity, and biosynthesis. Nat Prod Rep 2022; 39:512-559. [PMID: 34608478 DOI: 10.1039/d1np00049g] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Covering: up to June 2021A wide variety of mushrooms have traditionally been recognized as edible fungi with high nutritional value and low calories, and abundantly produce structurally diverse and bioactive secondary metabolites. However, accidental ingestion of poisonous mushrooms can result in serious illnesses and even death. Chemically, mushroom poisoning is associated with secondary metabolites produced in poisonous mushrooms, causing specific toxicity. However, many poisonous mushrooms have not been fully investigated for their secondary metabolites, and the secondary metabolites of poisonous mushrooms have not been systematically summarized for details such as chemical composition and biosynthetic mechanisms. The isolation and identification of secondary metabolites from poisonous mushrooms have great research value since these compounds could be lethal toxins that contribute to the toxicity of mushrooms or could provide lead compounds with remarkable biological activities that can promote advances in other related disciplines, such as biochemistry and pharmacology. In this review, we summarize the structures and biological activities of secondary metabolites identified from poisonous mushrooms and provide an overview of the current information on these metabolites, focusing on their chemistry, bioactivity, and biosynthesis.
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Affiliation(s)
- Seulah Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea. .,Division of Life Sciences, Korea Polar Research Institute, KIOST, Incheon 21990, Republic of Korea
| | - Jae Sik Yu
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea.
| | - Seoung Rak Lee
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea. .,Department of Chemistry, Princeton University, New Jersey, 08544, USA
| | - Ki Hyun Kim
- School of Pharmacy, Sungkyunkwan University, Suwon 16419, Republic of Korea.
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Le TM, Huynh T, Bamou FZ, Szekeres A, Fülöp F, Szakonyi Z. Novel (+)-Neoisopulegol-Based O-Benzyl Derivatives as Antimicrobial Agents. Int J Mol Sci 2021; 22:5626. [PMID: 34073167 PMCID: PMC8198684 DOI: 10.3390/ijms22115626] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2021] [Revised: 05/15/2021] [Accepted: 05/18/2021] [Indexed: 11/16/2022] Open
Abstract
Discovery of novel antibacterial agents with new structures, which combat pathogens is an urgent task. In this study, a new library of (+)-neoisopulegol-based O-benzyl derivatives of aminodiols and aminotriols was designed and synthesized, and their antimicrobial activity against different bacterial and fungal strains were evaluated. The results showed that this new series of synthetic O-benzyl compounds exhibit potent antimicrobial activity. Di-O-benzyl derivatives showed high activity against Gram-positive bacteria and fungi, but moderate activity against Gram-negative bacteria. Therefore, these compounds may serve a good basis for antibacterial and antifungal drug discovery. Structure-activity relationships were also studied from the aspects of stereochemistry of the O-benzyl group on cyclohexane ring and the substituent effects on the ring system.
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Affiliation(s)
- Tam Minh Le
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
- Stereochemistry Research Group of the Hungarian Academy of Sciences, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Thu Huynh
- Department of Microbiology, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary; (T.H.); (A.S.)
- Department of Biotecnology, Faculty of Chemical Engineering, Ho Chi Minh University of Technology (HCMUT), 268 Ly Thuong Kiet Street, District 10, Ho Chi Minh City 72607, Vietnam
- Vietnam National University Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City 71351, Vietnam
| | - Fatima Zahra Bamou
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
| | - András Szekeres
- Department of Microbiology, University of Szeged, Közép fasor 52, 6726 Szeged, Hungary; (T.H.); (A.S.)
- Interdisciplinary Centre of Natural Products, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
- Stereochemistry Research Group of the Hungarian Academy of Sciences, Eötvös utca 6, H-6720 Szeged, Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary Excellent Center, Eötvös utca 6, H-6720 Szeged, Hungary; (T.M.L.); (F.Z.B.); (F.F.)
- Interdisciplinary Centre of Natural Products, University of Szeged, Eötvös utca 6, H-6720 Szeged, Hungary
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Hamers V, Huguet C, Bourjot M, Urbain A. Antibacterial Compounds from Mushrooms: A Lead to Fight ESKAPEE Pathogenic Bacteria? PLANTA MEDICA 2021; 87:351-367. [PMID: 33063304 DOI: 10.1055/a-1266-6980] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Infectious diseases are among the greatest threats to global health in the 21st century, and one critical concern is due to antibiotic resistance developed by an increasing number of bacterial strains. New resistance mechanisms are emerging with many infections becoming more and more difficult if not impossible to treat. This growing phenomenon not only is associated with increased mortality but also with longer hospital stays and higher medical costs. For these reasons, there is an urgent need to find new antibiotics targeting pathogenic microorganisms such as ESKAPEE bacteria. Most of currently approved antibiotics are derived from microorganisms, but higher fungi could constitute an alternative and remarkable reservoir of anti-infectious compounds. For instance, pleuromutilins constitute the first class of antibiotics derived from mushrooms. However, macromycetes still represent a largely unexplored source. Publications reporting the antibacterial potential of mushroom extracts are emerging, but few purified compounds have been evaluated for their bioactivity on pathogenic bacterial strains. Therefore, the aim of this review is to compile up-to-date data about natural products isolated from fruiting body fungi, which significantly inhibit the growth of ESKAPEE pathogenic bacteria. When available, data regarding modes of action and cytotoxicity, mandatory when considering a possible drug development, have been discussed in order to highlight the most promising compounds.
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Affiliation(s)
- Violette Hamers
- Faculté de pharmacie, Université de Strasbourg, CNRS, IPHC UMR 7178, CAMBAP, Strasbourg, France
| | - Clément Huguet
- Faculté de pharmacie, Université de Strasbourg, CNRS, IPHC UMR 7178, CAMBAP, Strasbourg, France
| | - Mélanie Bourjot
- Faculté de pharmacie, Université de Strasbourg, CNRS, IPHC UMR 7178, CAMBAP, Strasbourg, France
| | - Aurélie Urbain
- Faculté de pharmacie, Université de Strasbourg, CNRS, IPHC UMR 7178, CAMBAP, Strasbourg, France
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Vallavan V, Krishnasamy G, Zin NM, Abdul Latif M. A Review on Antistaphylococcal Secondary Metabolites from Basidiomycetes. Molecules 2020; 25:E5848. [PMID: 33322256 PMCID: PMC7764641 DOI: 10.3390/molecules25245848] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 12/02/2020] [Accepted: 12/03/2020] [Indexed: 12/14/2022] Open
Abstract
Fungi are a rich source of secondary metabolites with several pharmacological activities such as antifungal, antioxidant, antibacterial and anticancer to name a few. Due to the large number of diverse structured chemical compounds they produce, fungi from the phyla Ascomycota, Basidiomycota and Muccoromycota have been intensively studied for isolation of bioactive compounds. Basidiomycetes-derived secondary metabolites are known as a promising source of antibacterial compounds with activity against Gram-positive bacteria. The continued emergence of antimicrobial resistance (AMR) poses a major challenge to patient health as it leads to higher morbidity and mortality, higher hospital-stay duration and substantial economic burden in global healthcare sector. One of the key culprits for AMR crisis is Staphylococcus aureus causing community-acquired infections as the pathogen develops resistance towards multiple antibiotics. The recent emergence of community strains of S. aureus harbouring methicillin-resistant (MRSA), vancomycin-intermediate (VISA) and vancomycin-resistant (VRSA) genes associated with increased virulence is challenging. Despite the few significant developments in antibiotic research, successful MRSA therapeutic options are still needed to reduce the use of scanty and expensive second-line treatments. This paper provides an overview of findings from various studies on antibacterial secondary metabolites from basidiomycetes, with a special focus on antistaphylococcal activity.
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Affiliation(s)
- Vimalah Vallavan
- Center for Diagnostic, Therapeutics & Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (V.V.); (N.M.Z.)
| | - Getha Krishnasamy
- Bioactivity Program, Natural Products Division, Forest Research Institute Malaysia (FRIM), Kepong 52109, Selangor, Malaysia
| | - Noraziah Mohamad Zin
- Center for Diagnostic, Therapeutics & Investigative Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia; (V.V.); (N.M.Z.)
| | - Mazlyzam Abdul Latif
- Center for Toxicology and Health Risk Studies, Faculty of Health Sciences, Universiti Kebangsaan Malaysia, Jalan Raja Muda Abdul Aziz, Kuala Lumpur 50300, Malaysia;
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Räisänen R, Primetta A, Nikunen S, Honkalampi U, Nygren H, Pihlava JM, Vanden Berghe I, von Wright A. Examining Safety of Biocolourants from Fungal and Plant Sources-Examples from Cortinarius and Tapinella, Salix and Tanacetum spp. and Dyed Woollen Fabrics. Antibiotics (Basel) 2020; 9:E266. [PMID: 32443886 PMCID: PMC7277368 DOI: 10.3390/antibiotics9050266] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Revised: 05/13/2020] [Accepted: 05/18/2020] [Indexed: 11/28/2022] Open
Abstract
Biocolourants have been investigated as alternatives to synthetic dyes. However, natural origin per se is not a label of harmlessness and research is needed to obtain safe dyes. We studied the cytotoxicity of the extracts from fungal (Cortinarius semisanguineus, Tapinella atrotomentosa) and plant (Tanacetum vulgare, Salix phylicifolia) sources and the woollen fabrics dyed with the extracts. Cytotoxicity in vitro using hepa-1 mouse hepatoma cells for 24 h and 72 h exposure was observed as the highest tolerated dose. All biocolourants produced intensive colour on fabrics with fastness properties from moderate to good. The Salix and Cortinarius samples did not show any cytotoxic effects, whereas the Tanacetum and Tapinella samples had slightly higher test values but were not interpreted as being significantly toxic. Higher than zero values of the undyed fabrics showed the importance of examining their toxicity as well. It was found that the cytotoxicity of the samples dyed with the biocolourants did not differ significantly from the undyed wool fabric. The concentrations of dyes used in the assays were very low, imitating the dose of the user. In addition to colouring properties, natural dyes may have pharmaceutical and antibacterial properties which would enhance the interest in using them in products for added value.
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Affiliation(s)
- Riikka Räisänen
- Craft Studies, University of Helsinki, P.O. Box 8, 00014 Helsinki, Finland; (A.P.); (S.N.)
| | - Anja Primetta
- Craft Studies, University of Helsinki, P.O. Box 8, 00014 Helsinki, Finland; (A.P.); (S.N.)
- Department of Environmental and Biological Sciences, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland
| | - Sari Nikunen
- Craft Studies, University of Helsinki, P.O. Box 8, 00014 Helsinki, Finland; (A.P.); (S.N.)
| | - Ulla Honkalampi
- Department of Pharmacology and Toxicology, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; (U.H.); (A.v.W.)
| | - Heli Nygren
- VTT Technical Research Centre of Finland Ltd., P.O. Box 1000, 02044 Espoo, Finland;
| | - Juha-Matti Pihlava
- Natural Resources Institute Finland (Luke), Tietotie 4, 31600 Jokioinen, Finland;
| | - Ina Vanden Berghe
- Royal Institute for Cultural Heritage (IRPA/KIK), Parc du Cinquantenaire 1, 1000 Brussels, Belgium;
| | - Atte von Wright
- Department of Pharmacology and Toxicology, University of Eastern Finland, P.O. Box 1627, 70211 Kuopio, Finland; (U.H.); (A.v.W.)
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Synthesis and Application of 1,2-Aminoalcohols with Neoisopulegol-Based Octahydrobenzofuran Core. Molecules 2019; 25:molecules25010021. [PMID: 31861609 PMCID: PMC6982906 DOI: 10.3390/molecules25010021] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 12/05/2019] [Accepted: 12/16/2019] [Indexed: 11/17/2022] Open
Abstract
A library of 1,2-aminoalcohol derivatives with a neoisopulegol-based octahydrobenzofuran core was developed and applied as chiral catalysts in the addition of diethylzinc to benzaldehyde. The allylic chlorination of (+)-neoisopulegol, derived from natural (–)-isopulegol followed by cyclization, gave the key methyleneoctahydrobenzofuran intermediate. The stereoselective epoxidation of the key intermediate and subsequent oxirane ring opening with primary amines afforded the required 1,2-aminoalcohols. The ring closure of the secondary amine analogues with formaldehyde provided spiro-oxazolidine ring systems. The dihydroxylation of the methylenetetrahydrofuran moiety with OsO4/NMO (4-methylmorpholine N-oxide) resulted in the formation of a neoisopulegol-based diol in a highly stereoselective reaction. The antimicrobial activity of both the aminoalcohol derivatives and the diol was also explored.
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Le TM, Szilasi T, Volford B, Szekeres A, Fülöp F, Szakonyi Z. Stereoselective Synthesis and Investigation of Isopulegol-Based Chiral Ligands. Int J Mol Sci 2019; 20:ijms20164050. [PMID: 31430981 PMCID: PMC6719113 DOI: 10.3390/ijms20164050] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 08/05/2019] [Accepted: 08/15/2019] [Indexed: 01/18/2023] Open
Abstract
A library of isopulegol-based bi-, tri- and tetrafunctional chiral ligands has been developed from commercially available (−)-isopulegol and applied as chiral catalysts in the addition of diethylzinc to benzaldehyde. Michael addition of primary amines towards α-methylene-γ-butyrolactone, followed by reduction, was accomplished to provide aminodiols in highly stereoselective transformations. Stereoselective epoxidation of (+)-neoisopulegol, derived from natural (−)-isopulegol, and subsequent oxirane ring opening with primary amines afforded aminodiols. The regioselective ring closure of N-substituted aminodiols with formaldehyde was also investigated. Hydroxylation of (+)-neoisopulegol resulted in diol, which was then transformed into aminotriols by aminolysis of its epoxides. Dihydroxylation of (+)-neoisopulegol or derivatives with OsO4/NMO gave neoisopulegol-based di-, tri- and tetraols in highly stereoselective reactions. The antimicrobial activity of aminodiol and aminotriol derivatives as well as di-, tri- and tetraols was also explored. In addition, structure–activity relationships were examined by assessing substituent effects on the aminodiol and aminotriol systems.
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Affiliation(s)
- Tam Minh Le
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary excellent center, H-6720 Szeged, Eötvös utca 6, Hungary
- Stereochemistry Research Group of the Hungarian Academy of Sciences, H-6720 Szeged, Eötvös utca 6, Hungary
| | - Tamás Szilasi
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary excellent center, H-6720 Szeged, Eötvös utca 6, Hungary
| | - Bettina Volford
- Department of Microbiology, University of Szeged, 6726 Szeged, Közép fasor 52, Hungary
| | - András Szekeres
- Department of Microbiology, University of Szeged, 6726 Szeged, Közép fasor 52, Hungary
| | - Ferenc Fülöp
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary excellent center, H-6720 Szeged, Eötvös utca 6, Hungary
- Stereochemistry Research Group of the Hungarian Academy of Sciences, H-6720 Szeged, Eötvös utca 6, Hungary
| | - Zsolt Szakonyi
- Institute of Pharmaceutical Chemistry, University of Szeged, Interdisciplinary excellent center, H-6720 Szeged, Eötvös utca 6, Hungary.
- Interdisciplinary Centre of Natural Products, University of Szeged, H-6720 Szeged, Eötvös utca 6, Hungary.
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12
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Pleurotus ostreatus as a Biocatalyst to Obtain Bicyclic Hydroxylactones with Three or Four Methyl Groups. Catalysts 2019. [DOI: 10.3390/catal9080643] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
The purpose of the study was to explore microbial transformations in cultures of basidiomycetes Pleurotus ostreatus, two bicyclic unsaturated lactones occurring in the form of two diastereoisomers. Some of these strains were able to transform unsaturated lactones into four known and three new derivatives. The structures of all lactones were established on the basis of spectroscopic data. Both substrates and products caused a complete inhibition of growth of A. alternata and F. linii strains.
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Skariyachan S, Taskeen N, Ganta M, Venkata Krishna B. Recent perspectives on the virulent factors and treatment options for multidrug-resistant Acinetobacter baumannii. Crit Rev Microbiol 2019; 45:315-333. [PMID: 31012772 DOI: 10.1080/1040841x.2019.1600472] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
Acinetobacter baumannii (AB) is one of the most notorious and opportunistic pathogens, which caused high morbidity and mortality rate and World Health Organization (WHO) declared this bacterium as priority-1 pathogen in 2017. The current antibacterial agents, such as colistins, carbapenems, and tigecyclines have limited applications, which necessitate novel and alternative therapeutic remedies. Thus, the understanding of recent perspectives on the virulent factors and antibiotic resistance mechanism exhibited by the bacteria are extremely important. In addition to many combinatorial therapies of antibacterial, there is several natural compounds demonstrated significant antibacterial potential towards these bacteria. The computational systems biology and high throughput screening approaches provide crucial insights in identifying novel drug targets and lead molecules with therapeutics potential. Hence, this review provides profound insight on the recent aspects of the virulent factors associated with AB, role of biofilm formation in drug resistance and the mechanisms of multidrug resistance. This review further illustrates the status of current therapeutic agents, scope, and applications of natural therapeutics, such as herbal medicines and role of computational biology, immunoinformatics and virtual screening in novel lead developments. Thus, this review provides novel insight on latest developments in drug-resistance mechanism of multidrug-resistant A. baumannii (MDRAB) and discovery of probable therapeutic interventions.
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Affiliation(s)
- Sinosh Skariyachan
- a Department of Biotechnology, Dayananda Sagar College of Engineering , Bangalore , India
| | - Neha Taskeen
- a Department of Biotechnology, Dayananda Sagar College of Engineering , Bangalore , India
| | - Meghana Ganta
- a Department of Biotechnology, Dayananda Sagar College of Engineering , Bangalore , India
| | - Bhavya Venkata Krishna
- a Department of Biotechnology, Dayananda Sagar College of Engineering , Bangalore , India
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14
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Tel-Çayan G. Phenolic profiles, antioxidant, and anticholinesterase activities of three Gloeophyllum species with chemometric approach. J Food Biochem 2019; 43:e12790. [PMID: 31353576 DOI: 10.1111/jfbc.12790] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2018] [Revised: 01/09/2019] [Accepted: 01/14/2019] [Indexed: 12/19/2022]
Abstract
This study's aim was to determine the antioxidant and anticholinesterase activities of Gloeophyllum odoratum, Gloeophyllum sepiarium, and Gloeophyllum trabeum species with phenolic profiles. The major compound in G. odoratum (101.6 µg/g) and G. sepiarium (92.61 µg/g) mushrooms was fumaric acid, while ferulic acid was found as the main compound in G. trabeum (11.67 μg/g). The methanol extracts of Gloeophyllum species exhibited the highest activity in CUPRAC, DPPH• , β-carotene-linoleic acid, and ABTS•+ assays while the n-hexane extracts showed the highest activity in the metal chelating assay. Also, the methanol extract of G. odoratum (IC50 : 32.16 ± 0.28 µg/mL) was found to be highly active than its antioxidant standard α-tocopherol (IC50 : 38.51 ± 0.54 µg/mL) in the ABTS•+ radical scavenging assay. All the studied Gloeophyllum species extracts were found to be moderate inhibitors against AChE, whereas G. sepiarium n-hexane extract (69.70 ± 1.92%) and G. odoratum n-hexane extract (58.08 ± 1.36%) exhibited potent BChE inhibitory activity. PRACTICAL APPLICATIONS: The results of these studies demonstrated that the methanol and the n-hexane extracts had a potential application as alternative natural products for pharmaceutical, food, and cosmetic industries. In addition, the chemometric analysis by principal component analysis and hierarchical clustering analysis techniques could be used for the classification of the extracts of Gloeophyllum according to their bioactivity results. This is the first comprehensive study on phenolic profiles and bioactivities of G. odoratum, G. sepiarium, and G. trabeum mushroom species.
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Affiliation(s)
- Gülsen Tel-Çayan
- Department of Chemistry and Chemical Processing Technologies, Muğla Vocational School, Muğla Sıtkı Koçman University, Muğla, Turkey
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