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Fernandes L, Costa R, Silva S, Henriques M, Costa-de-Oliveira S, Rodrigues ME. Effect of Vapor-Phase Oregano Essential Oil on Resistant Candida Species Biofilms: Mechanisms of Action. Microbiol Spectr 2023; 11:e0512422. [PMID: 36971589 PMCID: PMC10100680 DOI: 10.1128/spectrum.05124-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2022] [Accepted: 03/06/2023] [Indexed: 03/29/2023] Open
Abstract
Vulvovaginal candidiasis (VVC) is one of the most prevalent vaginal infectious diseases. The increasing incidence of drug-resistant Candida strains and the limited therapeutic options make the discovery of effective alternative therapies fundamental. Essential oils (EOs) have been suggested as a promising alternative, and interestingly, vapor-phase essential oils (VP-EOs) present more advantages than their direct application. Thus, this study aims to evaluate the effect of oregano VP-EO (VP-OEO) on biofilms of antifungal-resistant vaginal isolates of Candida species (Candida albicans and Candida glabrata) and determine its mode of action. CFU, membrane integrity, and metabolic activity were evaluated. Furthermore, a reconstituted vaginal epithelium was used to mimic vaginal conditions and evaluate the effect of VP-OEO on Candida species infection, analyzed by DNA quantification, microscopy, and lactate dehydrogenase activity. The results revealed high VP-OEO antifungal activity. There was a significant reduction (>4 log CFU) in Candida species biofilms. Furthermore, the results show that the mechanisms of action of VP-OEO are related to membrane integrity and metabolic activity. The epithelium model confirms the effectiveness of VP-OEO. This study suggests that VP-EO can be considered a first approach for the development of an alternative form of VVC treatment. IMPORTANCE This work presents a new approach to the application of essential oils, exposure to the vapor phase, which can be considered a first approach for the development of a complementary or alternative form of vulvovaginal candidiasis (VVC) treatment. VVC is a significant infection caused by Candida species and remains a common disease that affects millions of women every year. The great difficulty in treating VVC and the extremely limited effective therapeutic options make the development of alternative treatments crucial. In this scope, this study aims to contribute to the development of effective, inexpensive, and nontoxic strategies for the prevention and treatment of this infectious disease, based on natural products. Moreover, this new approach has several advantages for women, such as lower costs, easy access, an easier mode of application, avoidance of skin contact, and, therefore, fewer negative impacts on women's health.
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Affiliation(s)
- Liliana Fernandes
- Centre of Biological Engineering, LMaS—Laboratório de Microbiologia Aplicada à Saúde, University of Minho, Campus de Gualtar, Braga, Portugal
- LABBELS—Associate Laboratory, Braga/Guimarães, Portugal
| | - Raquel Costa
- Aromas Aqua Spa—Clínica Saúde, Vila Verde, Braga, Portugal
| | - Sónia Silva
- Centre of Biological Engineering, LMaS—Laboratório de Microbiologia Aplicada à Saúde, University of Minho, Campus de Gualtar, Braga, Portugal
- LABBELS—Associate Laboratory, Braga/Guimarães, Portugal
- National Institute for Agrarian and Veterinary Research, Vairão, Vila do Conde, Portugal
| | - Mariana Henriques
- Centre of Biological Engineering, LMaS—Laboratório de Microbiologia Aplicada à Saúde, University of Minho, Campus de Gualtar, Braga, Portugal
- LABBELS—Associate Laboratory, Braga/Guimarães, Portugal
| | - Sofia Costa-de-Oliveira
- Division of Microbiology, Department of Pathology, Faculty of Medicine, University of Porto, Porto, Portugal
- Center for Health Technology and Services Research—CINTESIS@RISE, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Maria E. Rodrigues
- Centre of Biological Engineering, LMaS—Laboratório de Microbiologia Aplicada à Saúde, University of Minho, Campus de Gualtar, Braga, Portugal
- LABBELS—Associate Laboratory, Braga/Guimarães, Portugal
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Advances in the Role and Mechanisms of Essential Oils and Plant Extracts as Natural Preservatives to Extend the Postharvest Shelf Life of Edible Mushrooms. Foods 2023; 12:foods12040801. [PMID: 36832876 PMCID: PMC9956186 DOI: 10.3390/foods12040801] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2023] [Revised: 02/06/2023] [Accepted: 02/09/2023] [Indexed: 02/16/2023] Open
Abstract
China has a large variety of edible mushrooms and ranks first in the world in terms of production and variety. Nevertheless, due to their high moisture content and rapid respiration rate, they experience constant quality deterioration, browning of color, loss of moisture, changes in texture, increases in microbial populations, and loss of nutrition and flavor during postharvest storage. Therefore, this paper reviews the effects of essential oils and plant extracts on the preservation of edible mushrooms and summarizes their mechanisms of action to better understand their effects during the storage of mushrooms. The quality degradation process of edible mushrooms is complex and influenced by internal and external factors. Essential oils and plant extracts are considered environmentally friendly preservation methods for better postharvest quality. This review aims to provide a reference for the development of new green and safe preservation and provides research directions for the postharvest processing and product development of edible mushrooms.
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Development of antioxidant and antimicrobial bioactive films based on Oregano essential oil/mesoporous nano-silica/sodium alginate. Food Packag Shelf Life 2021. [DOI: 10.1016/j.fpsl.2021.100691] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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Ruiz-Hernández K, Sosa-Morales ME, Cerón-García A, Gómez-Salazar JA. Physical, Chemical and Sensory Changes in Meat and Meat Products Induced by the Addition of Essential Oils: A Concise Review. FOOD REVIEWS INTERNATIONAL 2021. [DOI: 10.1080/87559129.2021.1939369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Affiliation(s)
- Karla Ruiz-Hernández
- Posgrado En Biociencias, Departamento De Alimentos, División De Ciencias De La Vida, Campus Irapuato-Salamanca, Universidad De Guanajuato, Irapuato, Guanajuato, Mexico
| | - María Elena Sosa-Morales
- Posgrado En Biociencias, Departamento De Alimentos, División De Ciencias De La Vida, Campus Irapuato-Salamanca, Universidad De Guanajuato, Irapuato, Guanajuato, Mexico
| | - Abel Cerón-García
- Posgrado En Biociencias, Departamento De Alimentos, División De Ciencias De La Vida, Campus Irapuato-Salamanca, Universidad De Guanajuato, Irapuato, Guanajuato, Mexico
| | - Julián Andrés Gómez-Salazar
- Posgrado En Biociencias, Departamento De Alimentos, División De Ciencias De La Vida, Campus Irapuato-Salamanca, Universidad De Guanajuato, Irapuato, Guanajuato, Mexico
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Maksimov AY, Balandina SY, Topanov PA, Mashevskaya IV, Chaudhary S. Organic Antifungal Drugs and Targets of Their Action. Curr Top Med Chem 2021; 21:705-736. [PMID: 33423647 DOI: 10.2174/1568026621666210108122622] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2020] [Revised: 08/20/2020] [Accepted: 09/03/2020] [Indexed: 11/22/2022]
Abstract
In recent decades, there has been a significant increase in the number of fungal diseases. This is due to a wide spectrum of action, immunosuppressants and other group drugs. In terms of frequency, rapid spread and globality, fungal infections are approaching acute respiratory infections. Antimycotics are medicinal substances endorsed with fungicidal or fungistatic properties. For the treatment of fungal diseases, several groups of compounds are used that differ in their origin (natural or synthetic), molecular targets and mechanism of action, antifungal effect (fungicidal or fungistatic), indications for use (local or systemic infections), and methods of administration (parenteral, oral, outdoor). Several efforts have been made by various medicinal chemists around the world for the development of antifungal drugs with high efficacy with the least toxicity and maximum selectivity in the area of antifungal chemotherapy. The pharmacokinetic properties of the new antimycotics are also important: the ability to penetrate biological barriers, be absorbed and distributed in tissues and organs, get accumulated in tissues affected by micromycetes, undergo drug metabolism in the intestinal microflora and human organs, and in the kinetics of excretion from the body. There are several ways to search for new effective antimycotics: - Obtaining new derivatives of the already used classes of antimycotics with improved activity properties. - Screening of new chemical classes of synthetic antimycotic compounds. - Screening of natural compounds. - Identification of new unique molecular targets in the fungal cell. - Development of new compositions and dosage forms with effective delivery vehicles. The methods of informatics, bioinformatics, genomics and proteomics were extensively investigated for the development of new antimycotics. These techniques were employed in finding and identification of new molecular proteins in a fungal cell; in the determination of the selectivity of drugprotein interactions, evaluation of drug-drug interactions and synergism of drugs; determination of the structure-activity relationship (SAR) studies; determination of the molecular design of the most active, selective and safer drugs for the humans, animals and plants. In medical applications, the methods of information analysis and pharmacogenomics allow taking into account the individual phenotype of the patient, the level of expression of the targets of antifungal drugs when choosing antifungal agents and their dosage. This review article incorporates some of the most significant studies covering the basic structures and approaches for the synthesis of antifungal drugs and the directions for their further development.
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Affiliation(s)
- Alexander Yu Maksimov
- Department of Pharmacy and Pharmacology, Faculty of Chemistry, Perm State University, Perm 614990, Russian Federation
| | - Svetlana Yu Balandina
- Department of Pharmacy and Pharmacology, Faculty of Chemistry, Perm State University, Perm 614990, Russian Federation
| | - Pavel A Topanov
- Department of Pharmacy and Pharmacology, Faculty of Chemistry, Perm State University, Perm 614990, Russian Federation
| | - Irina V Mashevskaya
- Department of Pharmacy and Pharmacology, Faculty of Chemistry, Perm State University, Perm 614990, Russian Federation
| | - Sandeep Chaudhary
- Laboratory of Organic and Medicinal Chemistry (OMC lab), Department of Chemistry, Malaviya National Institute of Technology Jaipur, Jawaharlal Nehru Marg, Jaipur 302017, India
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Pandey S, Prakash O, Zafar A, Hore SK, Pant AK, Mathela CS. Myorelaxant Effect of Essential Oil of Rhizome of Alpinia calcarata Rosc. on Rat Duodenal Smooth Muscle. Nat Prod Commun 2019. [DOI: 10.1177/1934578x0700200718] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
Abstract
Analysis of the essential oil from the rhizome of Alpinia calcarata Rosc. (ACREO) by a combination of GC and GC-MS revealed the presence of 1,8-cineole (42.2%), endo-fenchyl acetate (14.7%), camphene (7.6%), β-pinene (6.9%), α-terpineol (5.3%) and camphor (5.0%). Twenty-three compounds were identified in the oil. ACREO showed dose dependent myorelaxant activity in rat duodenum. The dose response curves of acetylcholine (ACh) and CaCl2 were shifted by ACREO to the right with increases in EC50 values and decreases in Vmax. These findings suggest that ACREO is a non-competitive antagonist of ACh and calcium.
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Affiliation(s)
- Siddharth Pandey
- Department of Chemistry, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar-263 145 Uttaranchal, India
| | - Om Prakash
- Department of Chemistry, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar-263 145 Uttaranchal, India
| | - Anjum Zafar
- Department of Pharmacology and Toxicology College of Veterinary and Animal Sciences, G.B. Pant University of Agriculture and Technology, Pantnagar-263 145 Uttaranchal, India
| | - Subrata K. Hore
- Department of Pharmacology and Toxicology College of Veterinary and Animal Sciences, G.B. Pant University of Agriculture and Technology, Pantnagar-263 145 Uttaranchal, India
| | - Anil K. Pant
- Department of Chemistry, College of Basic Sciences and Humanities, G.B. Pant University of Agriculture and Technology, Pantnagar-263 145 Uttaranchal, India
| | - Chandra S. Mathela
- Department of Chemistry, Kumaun University, Nainital, 263 002, Uttaranchal, India
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The anti-dermatophyte activity of Zataria multiflora essential oils. J Mycol Med 2017; 27:232-237. [PMID: 28347599 DOI: 10.1016/j.mycmed.2017.03.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 02/04/2017] [Accepted: 03/02/2017] [Indexed: 11/20/2022]
Abstract
OBJECTIVE Dermtophytes are a group of pathogenic fungi and the major cause of dermatophytosis in humans and animals. Fighting dermatophytes by natural essential oils is one important issue in new researches. MATERIALS AND METHODS In this investigation, we evaluated the anti-dermatophyte activities of three samples of Z. multiflora essential oils against dermatophytes along with analysis of chemical compositions of the essential oils and their anti-elastase activities on elastase production in dermatophytes. RESULTS Carvacrol (1.5-34.4%), thymol (25.8-41.2%), carvacrol methyl ether (1.9-28.3%) and p-cymene (2.3-8.3%) were the main components of Z. multiflora essential oils. Z. multiflora essential oils (100ppm) inhibited the mycelium growth of dermatophytes (6±1.7-47.0±1.4%) and had the minimal inhibitory concentration (MIC) and minimal fungicidal concentration (MFC) values of 0.03-0.25μl/ml against dermatophytes. Essential oils inhibited elastase produced in dermatophytes and pure porcine elastase. CONCLUSION Z. multiflora essential oils can be used as natural anti-dermatophyte agent for fighting dermatophytes in further preclinical and clinical studies.
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Bona E, Cantamessa S, Pavan M, Novello G, Massa N, Rocchetti A, Berta G, Gamalero E. Sensitivity of Candida albicans to essential oils: are they an alternative to antifungal agents? J Appl Microbiol 2016; 121:1530-1545. [PMID: 27568869 DOI: 10.1111/jam.13282] [Citation(s) in RCA: 66] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2016] [Revised: 07/14/2016] [Accepted: 08/25/2016] [Indexed: 11/30/2022]
Abstract
AIMS Candida albicans is an important opportunistic pathogen, responsible for the majority of yeast infections in humans. Essential oils, extracted from aromatic plants, are well-known antimicrobial agents, characterized by a broad spectrum of activities, including antifungal properties. The aim of this work was to assess the sensitivity of 30 different vaginal isolated strains of C. albicans to 12 essential oils, compared to the three main used drugs (clotrimazole, fluconazole and itraconazole). METHODS AND RESULTS Thirty strains of C. albicans were isolated from vaginal swab on CHROMagar™ Candida. The agar disc diffusion method was employed to determine the sensitivity to the essential oils. The antifungal activity of the essential oils and antifungal drugs (clotrimazole, itraconazole and fluconazole) were investigated using a microdilution method. Transmission and scanning electron microscopy analyses were performed to get a deep inside on cellular damages. Mint, basil, lavender, tea tree oil, winter savory and oregano essential oils inhibited both the growth and the activity of C. albicans more efficiently than clotrimazole. Damages induced by essential oils at the cellular level were stronger than those caused by clotrimazole. CONCLUSIONS Candida albicans is more sensitive to different essential oils compared to the main used drugs. Moreover, the essential oil affected mainly the cell wall and the membranes of the yeast. SIGNIFICANCE AND IMPACT OF THE STUDY The results of this work support the research for new alternatives or complementary therapies against vaginal candidiasis.
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Affiliation(s)
- E Bona
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
| | - S Cantamessa
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
| | - M Pavan
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
| | - G Novello
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
| | - N Massa
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
| | - A Rocchetti
- Azienda Sanitaria Santi Antonio, Biagio e Cesare Arrigo, Alessandria, Italy
| | - G Berta
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
| | - E Gamalero
- Dipartimento di Scienze e Innovazione Tecnologica, Università del Piemonte Orientale, Alessandria, Italy
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de Oliveira AS, Llanes LC, Brighente IMC, Nunes RJ, Yunes RA, Máximo Junior N, Baumgart AMK, Aust AN, Cruz AB. New Sulfonamides Derived from Carvacrol: Compounds with High Antibacterial Activity against Resistant <i>Staphylococcus aureus</i> Strains. ACTA ACUST UNITED AC 2016. [DOI: 10.4236/jbm.2016.47011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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Oliveira DR, Leitão GG, Fernandes PD, Leitão SG. Ethnopharmacological studies of Lippia origanoides. REVISTA BRASILEIRA DE FARMACOGNOSIA-BRAZILIAN JOURNAL OF PHARMACOGNOSY 2014. [DOI: 10.1016/j.bjp.2014.03.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Castilho PC, Savluchinske-Feio S, Weinhold TS, Gouveia SC. Evaluation of the antimicrobial and antioxidant activities of essential oils, extracts and their main components from oregano from Madeira Island, Portugal. Food Control 2012. [DOI: 10.1016/j.foodcont.2011.08.031] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Vale-Silva L, Silva MJ, Oliveira D, Gonçalves MJ, Cavaleiro C, Salgueiro L, Pinto E. Correlation of the chemical composition of essential oils from Origanum vulgare subsp. virens with their in vitro activity against pathogenic yeasts and filamentous fungi. J Med Microbiol 2012; 61:252-260. [DOI: 10.1099/jmm.0.036988-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Affiliation(s)
- Luís Vale-Silva
- CEQUIMED-UP, Microbiology Service, Biological Sciences Department, Faculty of Pharmacy, University of Porto, Rua Aníbal Cunha 164, 4050-047 Porto, Portugal
| | - Maria-João Silva
- CEQUIMED-UP, Microbiology Service, Biological Sciences Department, Faculty of Pharmacy, University of Porto, Rua Aníbal Cunha 164, 4050-047 Porto, Portugal
| | - Daniela Oliveira
- CEQUIMED-UP, Microbiology Service, Biological Sciences Department, Faculty of Pharmacy, University of Porto, Rua Aníbal Cunha 164, 4050-047 Porto, Portugal
| | - Maria-José Gonçalves
- Center of Pharmaceutical Studies, Faculty of Pharmacy, Health Science Campus, University of Coimbra, Azinhaga de S. Comba, 3000-354 Coimbra, Portugal
| | - Carlos Cavaleiro
- Center of Pharmaceutical Studies, Faculty of Pharmacy, Health Science Campus, University of Coimbra, Azinhaga de S. Comba, 3000-354 Coimbra, Portugal
| | - Lígia Salgueiro
- Center of Pharmaceutical Studies, Faculty of Pharmacy, Health Science Campus, University of Coimbra, Azinhaga de S. Comba, 3000-354 Coimbra, Portugal
| | - Eugénia Pinto
- CEQUIMED-UP, Microbiology Service, Biological Sciences Department, Faculty of Pharmacy, University of Porto, Rua Aníbal Cunha 164, 4050-047 Porto, Portugal
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Antifungal activity of phenolic-rich Lavandula multifida L. essential oil. Eur J Clin Microbiol Infect Dis 2011; 31:1359-66. [DOI: 10.1007/s10096-011-1450-4] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Accepted: 10/04/2011] [Indexed: 10/16/2022]
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Mechanism of antifungal activity of terpenoid phenols resembles calcium stress and inhibition of the TOR pathway. Antimicrob Agents Chemother 2010; 54:5062-9. [PMID: 20921304 DOI: 10.1128/aac.01050-10] [Citation(s) in RCA: 161] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Terpenoid phenols, including carvacrol, are components of oregano and other plant essential oils that exhibit potent antifungal activity against a wide range of pathogens, including Candida albicans, Staphylococcus aureus, and Pseudomonas aeruginosa. To gain a mechanistic view of the cellular response to terpenoid phenols, we used Saccharomyces cerevisiae as a model organism and monitored temporal changes in metabolic activity, cytosolic and vacuolar pH, and Ca(2+) transients. Using a panel of related compounds, we observed dose-dependent Ca(2+) bursts that correlated with antifungal efficacy. Changes in pH were long lasting and followed the Ca(2+) transients. A vma mutant lacking functional vacuolar H(+)-ATPase (V-ATPase) and defective in ion homeostasis was hypersensitive to carvacrol toxicity, consistent with a role for ionic disruptions in mediating cell death. Genomic profiling within 15 min of exposure revealed a robust transcriptional response to carvacrol, closely resembling that of calcium stress. Genes involved in alternate metabolic and energy pathways, stress response, autophagy, and drug efflux were prominently upregulated, whereas repressed genes mediated ribosome biogenesis and RNA metabolism. These responses were strongly reminiscent of the effects of rapamycin, the inhibitor of the TOR pathway of nutrient sensing. The results point to the activation of specific signaling pathways downstream of cellular interaction with carvacrol rather than a nonspecific lesion of membranes, as has been previously proposed.
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Pozzatti P, Loreto É, Nunes Mario D, Rossato L, Santurio J, Alves S. Activities of essential oils in the inhibition of Candida albicans and Candida dubliniensis germ tube formation. J Mycol Med 2010. [DOI: 10.1016/j.mycmed.2010.06.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Machado M, Sousa MDC, Salgueiro L, Cavaleiro C. Effects of Essential Oils on the Growth of Giardia lamblia Trophozoites. Nat Prod Commun 2010. [DOI: 10.1177/1934578x1000500132] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Giardia lamblia is one of the most important worldwide causes of intestinal infections produced by protozoa. Current therapy for giardiasis is unsatisfactory due to high incidence of undesirable side effects and significant failure in clearing parasites from the gastrointestinal tract. In the search for new therapeutic agents, we report on the effect of several essential oils on G. lamblia growth. Among eighteen tested essential oils, those with phenolic compositions were the most active, particularly if containing high contents of carvacrol, such as Thymbra capitata and Origanum virens (IC50 values of 71 and 85 μg.mL−1, respectively). The oils from Syzygium aromaticum and Thymus zygis subsp. sylvestris (IC50 values from 100 to 200 μg.mL−1), as well as, those from Mentha x piperita and Lippia graveolens (IC50 values over 200 μg.mL−1) were less active. Results support the concept that several essential oils or some of their constituents may be useful in the clinical management of Giardia infections.
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Affiliation(s)
- Marisa Machado
- Centro de Estudos Farmacêuticos / Faculdade de Farmácia, Universidade de Coimbra, 3000-548, Coimbra, Portugal
- Departmento de Farmácia, Escola Superior de Saúde do Vale do Ave / Centro de Investigação em Tecnologias da Saúde – CICS, IPSN-CESPU, 4760 Vila Nova de Famalicão, Portugal
| | - Maria do Céu Sousa
- Centro de Estudos Farmacêuticos / Faculdade de Farmácia, Universidade de Coimbra, 3000-548, Coimbra, Portugal
| | - Lígia Salgueiro
- Centro de Estudos Farmacêuticos / Faculdade de Farmácia, Universidade de Coimbra, 3000-548, Coimbra, Portugal
| | - Carlos Cavaleiro
- Centro de Estudos Farmacêuticos / Faculdade de Farmácia, Universidade de Coimbra, 3000-548, Coimbra, Portugal
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Garg A, Gupta B, Prakash R, Singh S. Preparation and Characterization of Hydroxypropyl-.BETA.-Cyclodextrin Inclusion Complex of Eugenol: Differential Pulse Voltammetry and 1H-NMR. Chem Pharm Bull (Tokyo) 2010; 58:1313-9. [DOI: 10.1248/cpb.58.1313] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- Anuj Garg
- Department of Pharmaceutics, Institute of Technology, Banaras Hindu University
| | - Bhavna Gupta
- School of Materials Science and Technology, Institute of Technology, Banaras Hindu University
| | - Rajiv Prakash
- School of Materials Science and Technology, Institute of Technology, Banaras Hindu University
| | - Sanjay Singh
- Department of Pharmaceutics, Institute of Technology, Banaras Hindu University
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Perumal Samy R, Gopalakrishnakone P. Therapeutic Potential of Plants as Anti-microbials for Drug Discovery. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2008; 7:283-94. [PMID: 18955349 PMCID: PMC2887332 DOI: 10.1093/ecam/nen036] [Citation(s) in RCA: 77] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2007] [Accepted: 04/18/2008] [Indexed: 12/28/2022]
Abstract
The uses of traditional medicinal plants for primary health care have steadily increased worldwide in recent years. Scientists are in search of new phytochemicals that could be developed as useful anti-microbials for treatment of infectious diseases. Currently, out of 80% of pharmaceuticals derived from plants, very few are now being used as anti-microbials. Plants are rich in a wide variety of secondary metabolites that have found anti-microbial properties. This review highlights the current status of traditional medicine, its contribution to modern medicine, recent trends in the evaluation of anti-microbials with a special emphasis upon some tribal medicine, in vitro and in vivo experimental design for screening, and therapeutic efficacy in safety and human clinical trails for commercial outlet. Many of these commercially available compounds are crude preparations administered without performing human clinical trials. Recent methods are useful to standardize the extraction for scientific investigation of new phytochemicals and anti-microbials of traditionally used plants. It is concluded that once the local ethnomedical preparations of traditional sources are scientifically evaluated before dispensing they should replace existing drugs commonly used for the therapeutic treatment of infection. This method should be put into practice for future investigations in the field of ethnopharmacology, phytochemistry, ethnobotany and other biological fields for drug discovery.
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Affiliation(s)
- Ramar Perumal Samy
- Venom and Toxin Research Programme, Department of Anatomy, Yong Loo Lin School of Medicine, National University of Singapore, Singapore - 117597
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Singleton CB, Mitchell M, Riggs S, Diaz O. Evaluating Quikon® Med as a Coccidiocide for Inland Bearded Dragons (Pogona vitticeps). J Exot Pet Med 2006. [DOI: 10.1053/j.jepm.2006.09.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Chami F, Chami N, Bennis S, Trouillas J, Remmal A. Evaluation of carvacrol and eugenol as prophylaxis and treatment of vaginal candidiasis in an immunosuppressed rat model. J Antimicrob Chemother 2004; 54:909-14. [PMID: 15456732 DOI: 10.1093/jac/dkh436] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
OBJECTIVES Anticandidal activity of carvacrol and eugenol, the major phenolic components of oregano and clove essential oils, respectively, were tested in vivo. METHODS Efficacy evaluation of carvacrol and eugenol in the prophylaxis and treatment of experimental vaginal candidiasis was performed in immunosuppressed rats. The anticandidal activity was analysed by microbiological and histological techniques and was compared with that of nystatin. RESULTS Microbiologically, prophylactic treatment with carvacrol eradicated the vaginal fungal burden of infected rats, whereas eugenol reduced the number of colony counts of Candida albicans in vaginas of infected rats by 98.9% 10 days after inoculation. Therapeutic treatment for 7 consecutive days with carvacrol was able to eradicate the vaginal candidal burden in 7/9 of the infected rats and reduced the number of colony counts of C. albicans in vaginas of the two remaining rats by 98%. Treatment with eugenol completely cured 2/9 of the infected animals, but the 7/9 still infected showed an 84% reduction of colony counts of C. albicans in their vaginas. Histologically, in all treated rats, no Candida organisms were found in the lumina of the vagina; this was in contrast to control groups in which many yeasts, strongly stained with periodic acid-Schiff, were observed. The results obtained with nystatin used at 10-fold minimal inhibitory concentration confirm the validity of this model. CONCLUSIONS Carvacrol and eugenol could be considered as promising products in the treatment of vaginal candidiasis. This work is a preliminary contribution to the development of a new generation of efficient and natural antifungal agents for curative treatment and prophylaxis.
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Affiliation(s)
- F Chami
- Faculté des Sciences, Fès Laboratoire de Biotechnologie, BP 1796, Atlas FES, Morocco
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