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Promising Role of the Scutellaria baicalensis Root Hydroxyflavone-Baicalein in the Prevention and Treatment of Human Diseases. Int J Mol Sci 2023; 24:ijms24054732. [PMID: 36902160 PMCID: PMC10003701 DOI: 10.3390/ijms24054732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2023] [Revised: 02/24/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Plant roots, due to a high content of natural antioxidants for many years, have been used in herbal medicine. It has been documented that the extract of Baikal skullcap (Scutellaria baicalensis) has hepatoprotective, calming, antiallergic, and anti-inflammatory properties. Flavonoid compounds found in the extract, including baicalein, have strong antiradical activity, which improves overall health and increases feelings of well-being. Plant-derived bioactive compounds with antioxidant activity have for a long time been used as an alternative source of medicines to treat oxidative stress-related diseases. In this review, we summarized the latest reports on one of the most important aglycones with respect to the pharmacological activity and high content in Baikal skullcap, which is 5,6,7-trihydroxyflavone (baicalein).
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Abstract
Baicalein (BE) is a promising antifungal small-molecule compound with an extended antifungal spectrum, good synergy with fluconazole, and low toxicity, but its target protein and antifungal mechanism remain elusive. In this study, we found that BE can function against Candida albicans by disrupting glycolysis through targeting Eno1 and inhibiting its function. Eno1 acts as a key therapeutic target of the drug, as BE had no antifungal activity against the eno1 null mutant in a Galleria mellonella model of C. albicans infection. To investigate the mechanism of action, we solved the crystal structure of C. albicans Eno1(CaEno1) and then compared the difference between this structure and that of Eno1 from humans. The predicted primary binding site of BE on CaEno1 is between amino acids D261 and W274, with D263, S269, and K273 playing critical roles in the interaction with BE. Both positions S269 and K273 have different residues in the human Eno1 (hEno1). This finding suggests that BE may bind selectively to CaEno1, which would limit the potential for side effects in humans. Our findings demonstrate that Eno1 is a target protein of BE and thus may serve as a novel target for the development of antifungal therapeutics acting through the inhibition of glycolysis. IMPORTANCE Baicalein (BE) is a promising antifungal agent which has been well characterized, but its target protein is still undiscovered. The protein Eno1 plays a crucial role in the survival of Candida albicans. However, there are few antifungal agents which inhibit the functions of Eno1. Here, we found that BE can function against Candida albicans by disrupting glycolysis through targeting Eno1 and inhibiting its function. We further solved the crystal structure of C. albicans Eno1(CaEno1) and predicted that the primary binding site of BE on CaEno1 is between amino acids D261 and W274, with D263, S269, and K273 playing critical roles in the interaction with BE. Our findings will be helpful to get specific small-molecule inhibitors of CaEno1 and open the way for the development of new antifungal therapeutics targeted at inhibiting glycolysis.
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Abou Baker DH. An ethnopharmacological review on the therapeutical properties of flavonoids and their mechanisms of actions: A comprehensive review based on up to date knowledge. Toxicol Rep 2022; 9:445-469. [PMID: 35340621 PMCID: PMC8943219 DOI: 10.1016/j.toxrep.2022.03.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2020] [Revised: 03/03/2022] [Accepted: 03/04/2022] [Indexed: 12/11/2022] Open
Abstract
Flavonoids -a class of low molecular weight secondary metabolites- are ubiquitous and cornucopia throughout the plant kingdom. Structurally, the main structure consists of C6-C3-C6 rings with different substitution patterns so that many sub-classes are obtained, for example: flavonols, flavonolignans, flavonoid glycosides, flavans, anthocyanidins, aurones, anthocyanidins, flavones, neoflavonoids, chalcones, isoflavones, flavones and flavanones. Flavonoids are evaluated to have drug like nature since they possess different therapeutic activities, and can act as cardioprotective, antiviral, antidiabetic, anti-inflammatory, antibacterial, anticancer, and also work against Alzheimer's disease and others. However, information on the relationship between their structure and biological activity is scarce. Therefore, the present review tries to summarize all the therapeutic activities of flavonoids, their mechanisms of action and the structure activity relationship. Latest updated ethnopharmacological review of the therapeutic effects of flavonoids. Flavonoids are attracting attention because of their therapeutic properties. Flavonoids are valuable candidates for drug development against many dangerous diseases. This overview summarizes the most important therapeutic effect and mechanism of action of flavonoids. General knowledge about the structure activity relationship of flavonoids is summarized. Substitution of chemical groups in the structure of flavonoids can significantly change their biological and chemical properties. The chemical properties of the basic flavonoid structure should be considered in a drug-based structural program.
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Kodeš Z, Vrublevskaya M, Kulišová M, Jaroš P, Paldrychová M, Pádrová K, Lokočová K, Palyzová A, Maťátková O, Kolouchová I. Composition and Biological Activity of Vitis vinifera Winter Cane Extract on Candida Biofilm. Microorganisms 2021; 9:microorganisms9112391. [PMID: 34835515 PMCID: PMC8622486 DOI: 10.3390/microorganisms9112391] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2021] [Revised: 11/10/2021] [Accepted: 11/18/2021] [Indexed: 01/30/2023] Open
Abstract
Vitis vinifera canes are waste material of grapevine pruning and thus represent cheap source of high-value polyphenols. In view of the fact that resistance of many pathogenic microorganisms to antibiotics is a growing problem, the antimicrobial activity of plant polyphenols is studied as one of the possible approaches. We have investigated the total phenolic content, composition, antioxidant activity, and antifungal activity against Candida biofilm of an extract from winter canes and a commercially available extract from blue grapes. Light microscopy and confocal microscopy imaging as well as crystal violet staining were used to quantify and visualize the biofilm. We found a decrease in cell adhesion to the surface depending on the concentration of resveratrol in the cane extract. The biofilm formation was observed as metabolic activity of Candida albicans, Candida parapsilosis and Candida krusei biofilm cells and the minimum biofilm inhibitory concentrations were determined. The highest inhibition of metabolic activity was observed in Candida albicans biofilm after treatment with the cane extract (30 mg/L) and blue grape extract (50 mg/L). The composition of cane extract was analyzed and found to be comparatively different from blue grape extract. In addition, the content of total phenolic groups in cane extract was three-times higher (12.75 gGA/L). The results showed that cane extract was more effective in preventing biofilm formation than blue grape extract and winter canes have proven to be a potential source of polyphenols for antimicrobial and antibiofilm treatment.
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Affiliation(s)
- Zdeněk Kodeš
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
| | - Maria Vrublevskaya
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
| | - Markéta Kulišová
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
| | - Petr Jaroš
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, 166 28 Prague, Czech Republic;
| | - Martina Paldrychová
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
| | - Karolína Pádrová
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
| | - Kristýna Lokočová
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
- Correspondence:
| | - Andrea Palyzová
- Institute of Microbiology, Czech Academy of Sciences, 14220 Prague, Czech Republic;
| | - Olga Maťátková
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
| | - Irena Kolouchová
- Department of Biotechnology, University of Chemistry and Technology, 166 28 Prague, Czech Republic; (Z.K.); (M.V.); (M.K.); (M.P.); (K.P.); (O.M.); (I.K.)
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Girardot M, Millot M, Hamion G, Billard JL, Juin C, Ntoutoume GMAN, Sol V, Mambu L, Imbert C. Lichen Polyphenolic Compounds for the Eradication of Candida albicans Biofilms. Front Cell Infect Microbiol 2021; 11:698883. [PMID: 34604104 PMCID: PMC8481799 DOI: 10.3389/fcimb.2021.698883] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2021] [Accepted: 08/19/2021] [Indexed: 01/10/2023] Open
Abstract
Lichens, due to their symbiotic nature (association between fungi and algae), constitute a chemical factory of original compounds. Polyphenolic compounds (depsides and depsidones) are the main constituents of lichens and are exclusively biosynthesized by these organisms. A panel of 11 polyphenols was evaluated for their anti-biofilm activity against Candida albicans biofilms on the maturation phase (anti-maturation) (MMIC50) as well as on preformed 24-h-old biofilm (anti-biofilm) (MBIC50) using the XTT assay. Minimum inhibitory concentrations of compounds (MICs) against C. albicans planktonic yeast were also determined using a broth microdilution method. While none of the tested compounds were active against planktonic cells (IC50 > 100 µg/ml), three depsides slowed the biofilm maturation (MMIC50 ≤12.5 µg/ml after 48 h of contact with Candida cells). Evernic acid was able to both slow the maturation and reduce the already formed biofilms with MBIC50 ≤12.5 µg/ml after 48 h of contact with the biofilm. This compound shows a weak toxicity against HeLa cells (22%) at the minimal active concentration and no hemolytic activity at 100 µg/ml. Microscopic observations of evernic acid and optimization of its solubility were performed to further study this compound. This work confirmed the anti-biofilm potential of depsides, especially evernic acid, and allows to establish the structure-activity relationships to better explain the anti-biofilm potential of these compounds.
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Affiliation(s)
- Marion Girardot
- UMR CNRS 7267, Laboratoire Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Marion Millot
- EA 7500, Laboratoire PEIRENE, Université de Limoges, Limoges, France
| | - Guillaume Hamion
- UMR CNRS 7267, Laboratoire Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Jeanne-Louise Billard
- UMR CNRS 7267, Laboratoire Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | - Camille Juin
- UMR CNRS 7267, Laboratoire Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
| | | | - Vincent Sol
- EA 7500, Laboratoire PEIRENE, Université de Limoges, Limoges, France
| | - Lengo Mambu
- EA 7500, Laboratoire PEIRENE, Université de Limoges, Limoges, France
| | - Christine Imbert
- UMR CNRS 7267, Laboratoire Ecologie et Biologie des Interactions, Université de Poitiers, Poitiers, France
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Lokočová K, Maťátková O, Vaňková E, Kolouchová I, Čejková A, Masák J. Synergistic Inhibitory Effect of Chitosan and Amphotericin B on Planktonic and Biofilm Populations of C. albicans, C. parapsilosis and C. krusei. Microbiology (Reading) 2021. [DOI: 10.1134/s0026261721030061] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
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Vaňková E, Paldrychová M, Kašparová P, Lokočová K, Kodeš Z, Maťátková O, Kolouchová I, Masák J. Natural antioxidant pterostilbene as an effective antibiofilm agent, particularly for gram-positive cocci. World J Microbiol Biotechnol 2020; 36:101. [DOI: 10.1007/s11274-020-02876-5] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2019] [Accepted: 06/21/2020] [Indexed: 02/07/2023]
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Vaňková E, Lokočová K, Maťátková O, Křížová I, Masák J, Grüner B, Kaule P, Čermák J, Šícha V. Cobalt bis-dicarbollide and its ammonium derivatives are effective antimicrobial and antibiofilm agents. J Organomet Chem 2019. [DOI: 10.1016/j.jorganchem.2019.120891] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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Kočendová J, Vaňková E, Volejníková A, Nešuta O, Buděšínský M, Socha O, Hájek M, Hadravová R, Čeřovský V. Antifungal activity of analogues of antimicrobial peptides isolated from bee venoms against vulvovaginal Candida spp. FEMS Yeast Res 2019; 19:5315757. [DOI: 10.1093/femsyr/foz013] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2018] [Accepted: 02/08/2019] [Indexed: 12/31/2022] Open
Abstract
ABSTRACT
Candida albicans is the main causative agent of vulvovaginal candidiasis (VVC), a common mycosis in women, relapses of which are difficult to manage due to biofilm formation. This study aimed at developing novel non-toxic compounds active against Candida spp. biofilms. We synthesised analogues of natural antifungal peptides LL-III (LL-III/43) and HAL-2 (peptide VIII) originally isolated from bee venoms and elucidated their structures by nuclear magnetic resonance spectroscopy. The haemolytic, cytotoxic, antifungal and anti-biofilm activities of LL-III/43 and peptide VIII were then tested. LL-III/43 and VIII showed moderate cytotoxicity to HUVEC-2 cells and had comparable inhibitory activity against C. albicans and non-albicans spp. The lowest minimum inhibitory concentration (MIC90) of LL-III/43 was observed towards Candida tropicalis (0.8 µM). That was 8-fold lower than that of antimycotic amphotericin B. Both peptides can be used to inhibit Candida spp. bio film f ormation. Biofilm inhibitory concentrations (BIC50) ranged from 0.9 to 58.6 µM and biofilm eradication concentrations (BEC50) for almost all tested Candida spp. strains ranged from 12.8 to 200 µM. Als o pro ven were the peptides’ abilities to reduce the area colonised by biofilms , inhibit hyphae formation and permeabilise cell membranes in biofil ms . LL-III/43 and VIII are promising candidates for further development as therapeutics against VVC.
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Affiliation(s)
- Jitka Kočendová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
| | - Eva Vaňková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
- University of Chemistry and Technology Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - Andrea Volejníková
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
| | - Ondřej Nešuta
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
| | - Miloš Buděšínský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
| | - Ondřej Socha
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
- Faculty of Mathematics and Physics, Charles University, Ke Karlovu 3, 121 16, Prague 2, Czech Republic
| | - Miroslav Hájek
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
| | - Romana Hadravová
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
| | - Václav Čeřovský
- Institute of Organic Chemistry and Biochemistry of the Czech Academy of Sciences, Flemingovo náměstí 2, 166 10, Prague 6, Czech Republic
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Effect of resveratrol and Regrapex-R-forte on Trichosporon cutaneum biofilm. Folia Microbiol (Praha) 2018; 64:73-81. [PMID: 30062620 DOI: 10.1007/s12223-018-0633-0] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2017] [Accepted: 07/12/2018] [Indexed: 01/21/2023]
Abstract
Microorganisms that cause chronic infections exist predominantly as surface-attached stable communities known as biofilms. Microbial cells in biofilms are highly resistant to conventional antibiotics and other forms of antimicrobial treatment; therefore, modern medicine tries to develop new drugs that exhibit anti-biofilm activity. We investigated the influence of a plant polyphenolic compound resveratrol (representative of the stilbene family) on the opportunistic pathogen Trichosporon cutaneum. Besides the influence on the planktonic cells of T. cutaneum, the ability to inhibit biofilm formation and to eradicate mature biofilm was studied. We have tested resveratrol as pure compound, as well as resveratrol in complex plant extract-the commercially available dietary supplement Regrapex-R-forte, which contains the extract of Vitis vinifera grape and extract of Polygonum cuspidatum root. Regrapex-R-forte is rich in stilbenes and other biologically active substances. Light microscopy imaging, confocal microscopy, and crystal violet staining were used to quantify and visualize the biofilm. The metabolic activity of biofilm-forming cells was studied by the tetrazolium salt assay. Amphotericin B had higher activity against planktonic cells; however, resveratrol and Regrapex-R-forte showed anti-biofilm effects, both in inhibition of biofilm formation and in the eradication of mature biofilm. The minimum biofilm eradicating concentration (MBEC80) for Regrapex-R-forte was found to be 2222 mg/L (in which resveratrol concentration is 200 mg/L). These methods demonstrated that Regrapex-R-forte can be employed as an anti-biofilm agent, as it has similar effect as amphotericin B (MBEC80 = 700 mg/L), which is routinely used in clinical practice.
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da Silva PM, de Moura MC, Gomes FS, da Silva Trentin D, Silva de Oliveira AP, de Mello GSV, da Rocha Pitta MG, de Melo Rego MJB, Coelho LCBB, Macedo AJ, de Figueiredo RCBQ, Paiva PMG, Napoleão TH. PgTeL, the lectin found in Punica granatum juice, is an antifungal agent against Candida albicans and Candida krusei. Int J Biol Macromol 2018; 108:391-400. [DOI: 10.1016/j.ijbiomac.2017.12.039] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2017] [Revised: 12/05/2017] [Accepted: 12/06/2017] [Indexed: 12/21/2022]
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12
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Francolini I, Piozzi A, Donelli G. Usnic Acid: Potential Role in Management of Wound Infections. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2018; 1214:31-41. [DOI: 10.1007/5584_2018_260] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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13
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Liposomal and Deoxycholate Amphotericin B Formulations: Effectiveness against Biofilm Infections of Candida spp. Pathogens 2017; 6:pathogens6040062. [PMID: 29194382 PMCID: PMC5750586 DOI: 10.3390/pathogens6040062] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Revised: 11/20/2017] [Accepted: 11/29/2017] [Indexed: 11/29/2022] Open
Abstract
Background: candidiasis is the primary fungal infection encountered in patients undergoing prolonged hospitalization, and the fourth leading cause of nosocomial bloodstream infections. One of the most important Candida spp. virulence factors is the ability to form biofilms, which are extremely refractory to antimicrobial therapy and very difficult to treat with the traditional antifungal therapies. It is known that the prophylaxis or treatment of a systemic candidiasis are recurrently taken without considering the possibility of a Candida spp. biofilm-related infections. Therefore, it is important to assess the effectiveness of the available drugs and which formulations have the best performance in these specific infections. Methods: 24-h-biofilms of four Candida spp. and their response to two amphotericin B (AmB) pharmaceutical formulations (liposomal and deoxycholate) were evaluated. Results: generally, Candida glabrata was the less susceptible yeast species to both AmBs. MBECs revealed that it is therapeutically more appealing to use AmB-L than AmB-Deox for all Candida spp. biofilms, since none of the determined concentrations of AmB-L reached 10% of the maximum daily dose, but both formulations showed a very good capacity in the biomass reduction. Conclusions: the liposomal formulation presents better performance in the eradication of the biofilm cells for all the species in comparison with the deoxycholate formulation.
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Kolouchová I, Maťátková O, Paldrychová M, Kodeš Z, Kvasničková E, Sigler K, Čejková A, Šmidrkal J, Demnerová K, Masák J. Resveratrol, pterostilbene, and baicalein: plant-derived anti-biofilm agents. Folia Microbiol (Praha) 2017; 63:261-272. [DOI: 10.1007/s12223-017-0549-0] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2017] [Accepted: 09/11/2017] [Indexed: 01/09/2023]
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15
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Millot M, Girardot M, Dutreix L, Mambu L, Imbert C. Antifungal and Anti-Biofilm Activities of Acetone Lichen Extracts against Candida albicans. Molecules 2017; 22:molecules22040651. [PMID: 28422057 PMCID: PMC6154547 DOI: 10.3390/molecules22040651] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Revised: 04/06/2017] [Accepted: 04/14/2017] [Indexed: 01/09/2023] Open
Abstract
Candida albicans is a commensal coloniser of the human gastrointestinal tract and an opportunistic pathogen, especially thanks to its capacity to form biofilms. This lifestyle is frequently involved in infections and increases the yeast resistance to antimicrobials and immune defenses. In this context, 38 lichen acetone extracts have been prepared and evaluated for their activity against C. albicans planktonic and sessile cells. Minimum inhibitory concentrations of extracts (MICs) were determined using the broth microdilution method. Anti-biofilm activity was evaluated using tetrazolium salt (XTT) assay as the ability to inhibit the maturation phase (anti-maturation) or to eradicate a preformed 24 h old biofilm (anti-biofilm). While none of the extracts were active against planktonic cells, biofilm maturation was limited by 11 of the tested extracts. Seven extracts displayed both anti-maturation and anti-biofilm activities (half maximal inhibitory concentrations IC50_mat and IC50_biof ≤ 100 µg/mL); Evernia prunastri and Ramalina fastigiata were the most promising lichens (IC50_mat < 4 µg/mL and IC50_biof < 10 µg/mL). Chemical profiles of the active extracts performed by thin layer chromatography (TLC) and high performance liquid chromatography (HPLC) have been analyzed. Depsides, which were present in large amounts in the most active extracts, could be involved in anti-biofilm activities. This work confirmed that lichens represent a reservoir of compounds with anti-biofilm potential.
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Affiliation(s)
- Marion Millot
- Laboratoire de Chimie des Substances Naturelles, Faculté de Pharmacie, 2 rue du Dr Marcland, 87025 Limoges, France.
| | - Marion Girardot
- Laboratoire Ecologie et Biologie des Interactions, Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, F-86073 Poitiers, France.
| | - Lucile Dutreix
- Laboratoire Ecologie et Biologie des Interactions, Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, F-86073 Poitiers, France.
| | - Lengo Mambu
- Laboratoire de Chimie des Substances Naturelles, Faculté de Pharmacie, 2 rue du Dr Marcland, 87025 Limoges, France.
| | - Christine Imbert
- Laboratoire Ecologie et Biologie des Interactions, Equipe Microbiologie de l'Eau, Université de Poitiers, UMR CNRS 7267, F-86073 Poitiers, France.
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Synergistic action of amphotericin B and rhamnolipid in combination on Candida parapsilosis and Trichosporon cutaneum. CHEMICAL PAPERS 2017. [DOI: 10.1007/s11696-017-0141-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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17
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Das A, Das MC, Sandhu P, Das N, Tribedi P, De UC, Akhter Y, Bhattacharjee S. Antibiofilm activity of Parkia javanica against Pseudomonas aeruginosa: a study with fruit extract. RSC Adv 2017. [DOI: 10.1039/c6ra24603f] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Parkia javanicais a well-known ethno-botanical plant of the north-east region of India.
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Affiliation(s)
- Antu Das
- Department of Molecular Biology & Bioinformatics
- Tripura University
- India
| | - Manash C. Das
- Department of Molecular Biology & Bioinformatics
- Tripura University
- India
| | - Padmani Sandhu
- Centre for Computational Biology and Bioinformatics
- School of Life Sciences
- Central University of Himachal Pradesh
- India
| | - Niranjan Das
- Department of Chemistry
- Netaji Subhash Mahavidyalaya
- Udaipur
- India
| | - Prosun Tribedi
- Department of Microbiology
- Don Bosco University
- Guwahati
- India
| | - Utpal C. De
- Department of Chemistry
- Tripura University
- India
| | - Yusuf Akhter
- Centre for Computational Biology and Bioinformatics
- School of Life Sciences
- Central University of Himachal Pradesh
- India
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Preparation, characterization, and the selective antimicrobial activity of N-alkylammonium 8-diethyleneglycol cobalt bis-dicarbollide derivatives. J Organomet Chem 2017. [DOI: 10.1016/j.jorganchem.2016.10.037] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
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Lu M, Li T, Wan J, Li X, Yuan L, Sun S. Antifungal effects of phytocompounds on Candida species alone and in combination with fluconazole. Int J Antimicrob Agents 2016; 49:125-136. [PMID: 28040409 DOI: 10.1016/j.ijantimicag.2016.10.021] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 09/14/2016] [Accepted: 10/14/2016] [Indexed: 12/14/2022]
Abstract
Invasive fungal infections caused by Candida spp. remain the most predominant nosocomial fungal infections. Owing to the increased use of antifungal agents, resistance of Candida spp. to antimycotics has emerged frequently, especially to fluconazole (FLC). To cope with this issue, new efforts have been dedicated to discovering novel antimycotics or new agents that can enhance the susceptibility of Candida spp. to existing antimycotics. The secondary metabolites of plants represent a large library of compounds that are important sources for new drugs or compounds suitable for further modification. Research on the anti-Candida activities of phytocompounds has been carried out in recent years and the results showed that a series of phytocompounds have anti-Candida properties, such as phenylpropanoids, flavonoids, terpenoids and alkaloids. Among these phytocompounds, some displayed potent antifungal activity, with minimum inhibitory concentrations (MICs) of ≤8 µg/mL, and several compounds were even more effective against drug-resistant Candida spp. than FLC or itraconazole (e.g. honokiol, magnolol and shikonin). Interestingly, quite a few phytocompounds not only displayed anti-Candida activity alone but also synergised with FLC against Candida spp., even leading to a reversal of FLC resistance. This review focuses on summarising the anti-Candida activities of phytocompounds as well as the interactions of phytocompounds with FLC. In addition, we briefly overview the synergistic mechanisms and present the structure of the antimycotic phytocompounds. Hopefully, this analysis will provide insight into antifungal agent discovery and new approaches against antifungal drug resistance.
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Affiliation(s)
- Mengjiao Lu
- School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province 250012, China
| | - Tao Li
- Intensive Care Unit, Qianfoshan Hospital affiliated to Shandong University, Jinan, Shandong Province 250014, China
| | - Jianjian Wan
- Department of Respiratory, Yucheng People's Hospital, Yucheng, Shandong Province 251200, China
| | - Xiuyun Li
- School of Pharmaceutical Sciences, Shandong University, Jinan, Shandong Province 250012, China
| | - Lei Yuan
- Department of Pharmacy, Baodi District People's Hospital, Tianjin 301800, China
| | - Shujuan Sun
- Department of Pharmacy, Qianfoshan Hospital Affiliated to Shandong University, Jinan, Shandong Province 250014, China.
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Kvasničková E, Paulíček V, Paldrychová M, Ježdík R, Maťátková O, Masák J. Aspergillus fumigatus DBM 4057 biofilm formation is inhibited by chitosan, in contrast to baicalein and rhamnolipid. World J Microbiol Biotechnol 2016; 32:187. [PMID: 27660214 DOI: 10.1007/s11274-016-2146-9] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2016] [Accepted: 09/18/2016] [Indexed: 12/24/2022]
Abstract
The biofilms of filamentous-forming fungi are a novel and still insufficiently understood research topic. We have studied Aspergillus fumigatus, an ubiquitous opportunistic pathogenic fungus, as a representative model for a study of biofilm formation by filamentous fungi and for assessing the potential anti-biofilm activity of natural substances. The activity of antibiotic amphotericin B and selected natural substances: baicalein, chitosan and rhamnolipid was studied. The minimum suspension inhibitory concentrations (MIC) were determined and the biofilm susceptibility was investigated by determining the metabolic activity of sessile cells (XTT assay) and total biofilm biomass (crystal violet staining). Significant time-dependent differences in substances' anti-biofilm activity were observed. Images of A. fumigatus biofilm were obtained by Cellavista automatic light microscope and spinning disc confocal microscopy. Baicalein and rhamnolipid were not found as suitable substances for inhibition of the A. fumigatus biofilm formation, as neither of the substances inhibited the sessile cells metabolic activity or the total biofilm biomass even at tenfold MIC after 48 h. In contrast, chitosan at 10 × MIC (25 µg mL-1), suppressed the biofilm metabolic activity by 90 % and the total biofilm biomass by 80 % even after 72 h of cultivation. Amphotericin B inhibited only 14 % of total biofilm biomass (crystal violet staining) and 35 % of metabolic activity (XTT assay) of adherent cells under the same conditions. Our results therefore suggest chitosan as potential alternative for treating A. fumigatus biofilm-associated infections.
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Affiliation(s)
- Eva Kvasničková
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - Vít Paulíček
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - Martina Paldrychová
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - Richard Ježdík
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic
| | - Olga Maťátková
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic.
| | - Jan Masák
- Department of Biotechnology, University of Chemistry and Technology, Prague, Technická 5, 166 28, Prague 6, Czech Republic
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