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Silva-Rodrigues RCD, Nóbrega-Alves DD, Néris-Andrade P, Oliveira-Barreto J, Benatti-Justino A, Salmen-Espindola F, de-Castro RD, Fechine-Tavares J, Sobral-da-Silva M, Sarmento-Guerra FQ, Cançado-Castellano LR. Antifungal activity of Annona crassiflora Mart. dichloromethane fraction against strains of C. albicans. BRAZ J BIOL 2024; 84:e278069. [PMID: 38865564 DOI: 10.1590/1519-6984.278069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2023] [Accepted: 04/08/2024] [Indexed: 06/14/2024] Open
Abstract
Products derived from medicinal plants with antimicrobial activity are considered a promising alternative in the treatment of fungal infections. In this perspective, this study proposed to evaluate the antifungal activity of the dichloromethane fraction of Annona crassiflora Mart. against C. albicans strains. Tests were carried out to determine Minimum Inhibitory Concentration (MIC), Minimum Fungicide Concentration (MFC), microbial growth kinetics, fungal cell wall and membrane mechanisms of action, antifungal biofilm activity, and cytotoxic effects on human erythrocytes. The extract presented MIC and MFC values that ranged from 256 µg/mL to 1,024 µg/mL, with fungicidal activity in the microbial growth kinetics assay. The mechanism of action did not occur through damage to the cell wall or via binding to ergosterol in the membrane, though the fraction presents activity against biofilm and is not cytotoxic in human erythrocytes. The dichloromethane fraction of Annona crassiflora Mart. presented antifungal activity and reduced biofilm growth, without toxicity against human erythrocytes; however, further studies are needed to define its mechanism of action.
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Affiliation(s)
- R C da Silva-Rodrigues
- Universidade Federal da Paraíba - UFPB, Departamento de Clínica e Odontologia Social, Laboratório de Farmacologia Experimental e Cultura Celular, João Pessoa, PB, Brasil
| | - D da Nóbrega-Alves
- Universidade Federal da Paraíba - UFPB, Departamento de Clínica e Odontologia Social, Laboratório de Farmacologia Experimental e Cultura Celular, João Pessoa, PB, Brasil
| | - P Néris-Andrade
- Universidade Federal da Paraíba - UFPB, Departamento de Clínica e Odontologia Social, Laboratório de Farmacologia Experimental e Cultura Celular, João Pessoa, PB, Brasil
| | - J Oliveira-Barreto
- Universidade Federal da Paraíba - UFPB, Departmento de Ciências Farmacêuticas, Laboratório de Mycologia Clínica, João Pessoa, PB, Brasil
| | - A Benatti-Justino
- Universidade Federal de Uberlândia - UFU, Biologia Molecular e Laboratório de Bioquímica, Uberlândia, MG, Brasil
| | - F Salmen-Espindola
- Universidade Federal de Uberlândia - UFU, Biologia Molecular e Laboratório de Bioquímica, Uberlândia, MG, Brasil
| | - R Dias de-Castro
- Universidade Federal da Paraíba - UFPB, Departamento de Clínica e Odontologia Social, Laboratório de Farmacologia Experimental e Cultura Celular, João Pessoa, PB, Brasil
| | - J Fechine-Tavares
- Universidade Federal da Paraíba - UFPB, Departmento de Ciências Farmacêuticas, Laboratório de Tecnologia Farmacêutica, João Pessoa, PB, Brasil
| | - M Sobral-da-Silva
- Universidade Federal da Paraíba - UFPB, Departmento de Ciências Farmacêuticas, Laboratório de Tecnologia Farmacêutica, João Pessoa, PB, Brasil
| | - F Q Sarmento-Guerra
- Universidade Federal da Paraíba - UFPB, Departmento de Ciências Farmacêuticas, Laboratório de Mycologia Clínica, João Pessoa, PB, Brasil
| | - L R Cançado-Castellano
- Universidade Federal da Paraíba - UFPB, Escola Técnica de Saúde - ETS, Grupo de Pesquisa e Estudo de Imunologia Humana, João Pessoa, PB, Brasil
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Sharma M, Yadav A, Dubey KK, Tipple J, Das DB. Decentralized systems for the treatment of antimicrobial compounds released from hospital aquatic wastes. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 840:156569. [PMID: 35690196 DOI: 10.1016/j.scitotenv.2022.156569] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2022] [Revised: 06/04/2022] [Accepted: 06/05/2022] [Indexed: 06/15/2023]
Abstract
In many developing countries, untreated hospital effluents are discharged and treated simultaneously with municipal wastewater. However, if the hospital effluents are not treated separately, they pose concerning health risks due to the possible transport of the antimicrobial genes and microbes in the environment. Such effluent is considered as a point source for a number of potentially infectious microorganisms, waste antimicrobial compounds and other contaminants that could promote antimicrobial resistance development. The removal of these contaminants prior to discharge reduces the exposure of antimicrobials to the environment and this should lower the risk of superbug development. At an effluent discharge site, suitable pre-treatment of wastewater containing antimicrobials could maximise the ecological impact with potentially reduced risk to human health. In addressing these points, this paper reviews the applications of decentralized treatment systems toward reducing the concentration of antimicrobials in wastewater. The most commonly used techniques in decentralized wastewater treatment systems for onsite removal of antimicrobials were discussed and evidence suggests that hybrid techniques should be more useful for the efficient removal of antimicrobials. It is concluded that alongside the cooperation of administration departments, health industries, water treatment authorities and general public, decentralized treatment technology can efficiently enhance the removal of antimicrobial compounds, thereby decreasing the concentration of contaminants released to the environment that could pose risks to human and ecological health due to development of antimicrobial resistance in microbes.
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Affiliation(s)
- Manisha Sharma
- Bioprocess Engineering Laboratory, Department of Biotechnology, Central University of Haryana, Mahendergarh, Haryana 123031, India
| | - Ankush Yadav
- Bioprocess Engineering Laboratory, Department of Biotechnology, Central University of Haryana, Mahendergarh, Haryana 123031, India
| | - Kashyap Kumar Dubey
- Bioprocess Engineering Laboratory, School of Biotechnology, Jawaharlal Nehru University, New Delhi 110067, India.
| | - Joshua Tipple
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom
| | - Diganta Bhusan Das
- Department of Chemical Engineering, Loughborough University, Loughborough LE11 3TU, United Kingdom.
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Repurposing Antifungals for Host-Directed Antiviral Therapy? Pharmaceuticals (Basel) 2022; 15:ph15020212. [PMID: 35215323 PMCID: PMC8878022 DOI: 10.3390/ph15020212] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 02/04/2022] [Accepted: 02/08/2022] [Indexed: 02/04/2023] Open
Abstract
Because of their epidemic and pandemic potential, emerging viruses are a major threat to global healthcare systems. While vaccination is in general a straightforward approach to prevent viral infections, immunization can also cause escape mutants that hide from immune cell and antibody detection. Thus, other approaches than immunization are critical for the management and control of viral infections. Viruses are prone to mutations leading to the rapid emergence of resistant strains upon treatment with direct antivirals. In contrast to the direct interference with pathogen components, host-directed therapies aim to target host factors that are essential for the pathogenic replication cycle or to improve the host defense mechanisms, thus circumventing resistance. These relatively new approaches are often based on the repurposing of drugs which are already licensed for the treatment of other unrelated diseases. Here, we summarize what is known about the mechanisms and modes of action for a potential use of antifungals as repurposed host-directed anti-infectives for the therapeutic intervention to control viral infections.
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Li H, Cai Y, Deng Q, Bao H, Chen J, Shen W. Cytochrome P450 Sterol 14 Alpha-Demethylase Gene SsCI72380 Is Required for Mating/Filamentation and Pathogenicity in Sporisorium scitamineum. Front Microbiol 2022; 12:696117. [PMID: 35002988 PMCID: PMC8733404 DOI: 10.3389/fmicb.2021.696117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2021] [Accepted: 12/01/2021] [Indexed: 11/13/2022] Open
Abstract
Sugarcane smut is a significant sugarcane disease caused by Sporisorium scitamineum and is a large threat to the sugar industry in China and the world. Accordingly, it is important to study the pathogenic mechanism by which this disease occurs to identify effective prevention and control strategies. Gene SsCI72380, which encodes cytochrome P450 sterol 14 alpha-demethylase (CYP51), was screened out from the transcriptome of S. scitamineum. In this study, the functions of gene SsCI72380 were identified via the knockout mutants ΔSs72380+ and ΔSs72380−, which were obtained by polyethylene glycol (PEG)-mediated protoplast transformation technology, as well as the complementary mutants COM72380+ and COM72380−. The results showed that the CYP51 gene SsCI72380 played an important role in sporidial growth, sexual mating/filamentation, hyphae growth, and pathogenicity in S. scitamineum. Gene SsCI72380 may regulate the biosynthesis process of ergosterol by encoding CYP51 enzymes and then affecting the structure and function of the cell membrane. Gene SsCI72380 also played an important role in the response toward different abiotic stresses, including hyperosmotic stress, oxidative stress, and cell wall stress, by regulating the permeability of the cell membrane. In addition, gene SsCI72380 is a new type of pathogenic gene from S. scitamineum that enhances the pathogenicity of S. scitamineum.
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Affiliation(s)
- Huizhong Li
- College of Agriculture, South China Agricultural University, Guangzhou, China.,Sugarcane Research Laboratory, South China Agricultural University, Guangzhou, China
| | - Yichang Cai
- College of Agriculture, South China Agricultural University, Guangzhou, China.,Sugarcane Research Laboratory, South China Agricultural University, Guangzhou, China
| | - Quanqing Deng
- College of Agriculture, South China Agricultural University, Guangzhou, China.,Sugarcane Research Laboratory, South China Agricultural University, Guangzhou, China
| | - Han Bao
- College of Agriculture, South China Agricultural University, Guangzhou, China.,Sugarcane Research Laboratory, South China Agricultural University, Guangzhou, China
| | - Jianwen Chen
- College of Agriculture, South China Agricultural University, Guangzhou, China.,Sugarcane Research Laboratory, South China Agricultural University, Guangzhou, China
| | - Wankuan Shen
- College of Agriculture, South China Agricultural University, Guangzhou, China.,Sugarcane Research Laboratory, South China Agricultural University, Guangzhou, China.,Scientific Observing and Experimental Station of Crop Cultivation in South China, Ministry of Agriculture and Rural Areas, Guangzhou, China
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Saracino IM, Foschi C, Pavoni M, Spigarelli R, Valerii MC, Spisni E. Antifungal Activity of Natural Compounds vs. Candida spp.: A Mixture of Cinnamaldehyde and Eugenol Shows Promising In Vitro Results. Antibiotics (Basel) 2022; 11:antibiotics11010073. [PMID: 35052950 PMCID: PMC8773119 DOI: 10.3390/antibiotics11010073] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2021] [Revised: 12/30/2021] [Accepted: 01/05/2022] [Indexed: 01/09/2023] Open
Abstract
Candida spp. are commensal organisms of the skin, mucous membranes, gastrointestinal tract, blood, and vagina of animals and humans. In recent decades, the incidence of human fungal infections has increased, with Candida spp. (mainly C. albicans) infections being the most frequent, and the treatment of fungal infections is still a clinical challenge. Colonization of the human gastrointestinal tract by Candida spp. is significant because infections (e.g., candidemia and vulvovaginal candidiasis) frequently arise from commensal microorganisms. The aim of this study was to test in vitro the antifungal activity and the eventual synergistic effect of five pure components of essential oils: cinnamaldehyde, α-pinene, limonene, eucalyptol, and eugenol. These compounds were tested on 18 Candida strains (15 C. albicans, 2 C. glabrata, and 1 C. lusitaniae) derived from a culture collection of vaginal clinical strains. Methods: Fungistatic activity was evaluated using the disk diffusion method. For fungicidal activity, microdilution and time–kill curve protocols were set up. The checkerboard method was chosen to evaluate a possible synergistic effect of these compounds when mixed. Results: Cinnamaldehyde and eugenol gave the best results, inhibiting all the Candida strains and showing a highly additive effect (FICI 0.625). The cinnamaldehyde inhibition zone (IZ), MIC, and MFC means were 69 mm, 50.05 mg/L, and 109.26 mg/L respectively. Cinnamaldehyde led to the total loss of viable Candida cells within 4 h. Eugenol IZ, MIC, and MFC means were 35.2 mm, 455.42 mg/L, and 690.09 mg/L, respectively. Eugenol led to the total loss of viable fungal cells within 1 h. Treatment with α-pinene inhibited 88.9% of Candida strains, with an IZ mean of 21.2 mm, a MIC mean of 195.41 mg/L, and a MFC mean of 251.27 mg/L; this compound led to the total loss of viable fungal cells only after 24 h. Limonene inhibited only 33.3% of the tested strains and eucalyptol did not produce an inhibition halo, so these compounds were not tested further. Conclusions: These characteristics, together with the well-known safety of cinnamaldehyde and eugenol for human use, make these two natural compounds the perfect candidates for the treatment of candidiasis. This was a pilot study, the purpose of which was to evaluate the best composition of a mixture to be used against intestinal and vulvovaginal candidiasis; in vivo studies are needed to confirm these very encouraging results.
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Affiliation(s)
- Ilaria Maria Saracino
- Microbiology Unit, Department of Specialized, Experimental and Diagnostic Medicine, Istituto di Ricovero e Cura a Carattere Scientifico St. Orsola Polyclinic, University of Bologna, 40138 Bologna, Italy; (C.F.); (M.P.)
- Correspondence:
| | - Claudio Foschi
- Microbiology Unit, Department of Specialized, Experimental and Diagnostic Medicine, Istituto di Ricovero e Cura a Carattere Scientifico St. Orsola Polyclinic, University of Bologna, 40138 Bologna, Italy; (C.F.); (M.P.)
| | - Matteo Pavoni
- Microbiology Unit, Department of Specialized, Experimental and Diagnostic Medicine, Istituto di Ricovero e Cura a Carattere Scientifico St. Orsola Polyclinic, University of Bologna, 40138 Bologna, Italy; (C.F.); (M.P.)
| | - Renato Spigarelli
- Department of Biological, Geological and Environmental Sciences, University of Bologna, 40126 Bologna, Italy; (R.S.); (M.C.V.); (E.S.)
| | - Maria Chiara Valerii
- Department of Biological, Geological and Environmental Sciences, University of Bologna, 40126 Bologna, Italy; (R.S.); (M.C.V.); (E.S.)
| | - Enzo Spisni
- Department of Biological, Geological and Environmental Sciences, University of Bologna, 40126 Bologna, Italy; (R.S.); (M.C.V.); (E.S.)
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Mechanism of streptomyces albidoflavus STV1572a derived 1-heneicosanol as an inhibitor against squalene epoxidase of Trichophyton mentagrophytes. Microb Pathog 2021; 154:104853. [PMID: 33811987 DOI: 10.1016/j.micpath.2021.104853] [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: 01/19/2021] [Revised: 03/05/2021] [Accepted: 03/05/2021] [Indexed: 11/20/2022]
Abstract
An increase in incidences of tinea infections paves the way to discover the novel antifungal drugs from unexplored natural resources. The quality of life in patients with tinea infection may be affected by different factors, including morbidity, length of illness, social and demographic factors. The present investigation explores the functional principle of a bioactive compound isolated from actinomycetes, S. albidoflavus STV1572a by in-silico and in-vitro studies. In continuation of our previous reports on the antidermatophytic potential of S. albidoflavus STV1572a, this study progresses with the in-silico molecular docking study of the seven GC-MS discovered ligands, and six dermatophytic modelled targets. Through virtual screening, it was revealed that a docking score -8.8 between 1-heneicosanol and squalene epoxidase favored partially in understanding the mode of action. Further validation of in-silico study was performed by a sterol quantification assay which confirmed the antidermatophytic mechanism of 1-heneicosanol. Taken together, the evidence from this study suggests that 1-heneicosanol has a potential antidermatophytic compound and can be considered for dermatophytic treatment.
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Ellagic Acid Inhibits Trichophyton rubrum Growth via Affecting Ergosterol Biosynthesis and Apoptotic Induction. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2020; 2020:7305818. [PMID: 33193798 PMCID: PMC7641703 DOI: 10.1155/2020/7305818] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 09/05/2020] [Accepted: 09/16/2020] [Indexed: 11/29/2022]
Abstract
Background Trichophyton rubrum, among other dermatophytes, is a major causative agent for superficial dermatomycoses like onychomycosis and tinea pedis, especially among pediatric and geriatric populations. Ellagic acid (EA) and shikonin (SK) have been reported to have many bioactivities, including antifungal activity. However, the mechanism of EA and SK on Trichophyton rubrum has not yet been reported. Objectives The purposes of this study were to evaluate the antifungal activities of EA and SK against Trichophyton rubrum and to illuminate the underlying action mechanisms. Methods The effect of EA (64, 128, and 256 μg/mL) and SK (8, 4, and 2 μg/mL) on Trichophyton rubrum was investigated with different doses via detecting cell viability, ultrastructure with using a scanning electron microscope (SEM), cell apoptosis and necrosis by using the flow cytometry instrument technique (FCIT), and the ergosterol biosynthesis pathway-related fungal cell membrane key gene expressions in vitro. Results SEM detection revealed that the T. rubrum cell surface was shrivelled, folded, and showed deformation and expansion, visible surface peeling, and broken hyphae, and cell contents overflowed after being treated with EA and SK; the cell apoptosis rate was significantly increased in dose-dependent manner after T. rubrum was treated with EA and SK; the qPCR results showed that mRNA expression of MEP4 and SUB1 was downregulated in EA- and SK-treated groups. Conclusions Overall, our results revealed the underlying antifungal mechanism of EA and SK, which may be related to the destruction of the fungal cell membrane and inhibition of C14 demethylase and the catalytic rate of squalene cyclooxidase in the ergosterol biosynthesis pathway via downregulation of MEP4 and SUB1, suggesting that EA and SK have the potential to be developed further as a natural antifungal agent for clinical use.
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Ngo-Mback MNL, Babii C, Jazet Dongmo PM, Kouipou Toghueo MR, Stefan M, Fekam Boyom F. Anticandidal and synergistic effect of essential oil fractions from three aromatic plants used in Cameroon. J Mycol Med 2020; 30:100940. [PMID: 32201243 DOI: 10.1016/j.mycmed.2020.100940] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2019] [Revised: 01/18/2020] [Accepted: 02/26/2020] [Indexed: 01/08/2023]
Abstract
Despite the use of conventional antifungal drugs, Candida spp resistance, especially mediated by biofilms formation remains recurrent. Therefore, new drugs to treat fungal infections are urgently needed. In this line, our study aimed to determine the anticandidal activity and the synergistic effect of essential oil fractions from Syzygium aromaticum, Cymbopogon citratus and Aeollanthus heliotropioides harvested in Cameroon using a combination approach. Essential oils have been obtained by hydrodistillation and their chemical composition was analysed by GC/MS. Antifungal activity was evaluated by the determination of minimum inhibitory concentration (MIC) using a micro-dilution method. The sorbitol and ergosterol binding ability and anti-biofilm activity were also assessed in order to evaluate the mode of action. The crude essential oils showed a good anticandidal activity, most probably due to the eugenol, linalool and citral content. The combination of two fractions F7 and F10 showed an improved growth inhibition of Candida spp compared to the crude essential oils. The inhibitory effect could be related with the presence of γ-dodecalactone and citronellol as main compounds. The best synergistic combination F7F10 inhibited biofilm formation at ten time reduced combination MIC. The active fractions targeted different fungal cell structures, including cell wall and membrane. Our study showed that the combination of selected essential oils fractions exhibited an increased antifungal activity against Candida spp compared to the crude essential oils. The combination approach of inner compound groups may be used as a promising strategy for the development of efficient recombined micro-essential oils as antifungal agents to face Candida resistance.
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Affiliation(s)
- M N L Ngo-Mback
- Antimicrobial Agents Unit, Laboratory of Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon; Laboratory of Microbiology, Department of Biology, The Alexandru Ioan Cuza University of Iasi, Bld. Carol I, Nr. 11, 700506 Iasi, Romania; Institute of Halieutic Sciences (ISH)-Yabassi, University of Douala, PO Box 24157, Douala, Cameroon
| | - C Babii
- Laboratory of Microbiology, Department of Biology, The Alexandru Ioan Cuza University of Iasi, Bld. Carol I, Nr. 11, 700506 Iasi, Romania; Integrated Center for Environmental Sciences Studies - North Eastern, CERNESIM, The Alexandru Ioan Cuza University of Iasi, Bld. Carol I, Nr. 11, 700506 Iasi, Romania
| | - P M Jazet Dongmo
- Laboratory of Biochemistry, Department of Biochemistry, University of Douala, PO Box 24157, Douala, Cameroon
| | - M R Kouipou Toghueo
- Antimicrobial Agents Unit, Laboratory of Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon; Malaria Research Laboratory, International Centre for Genetic Engineering and Biotechnology, Aruna Asaf Ali Marg, New Delhi 110067, India
| | - M Stefan
- Laboratory of Microbiology, Department of Biology, The Alexandru Ioan Cuza University of Iasi, Bld. Carol I, Nr. 11, 700506 Iasi, Romania.
| | - F Fekam Boyom
- Antimicrobial Agents Unit, Laboratory of Phytobiochemistry and Medicinal Plants Studies, Department of Biochemistry, Faculty of Science, University of Yaoundé I, PO Box 812, Yaoundé, Cameroon
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Mishra AK, Kumar A, Singh H, Verma S, Sahu JK, Mishra A. Chemistry and Pharmacology of Luliconazole (Imidazole Derivative): A Novel Bioactive Compound to Treat Fungal Infection-A Mini Review. ACTA ACUST UNITED AC 2020. [DOI: 10.2174/1573407214666180717111419] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Background:
Currently, ringworm treatment drugs include two major categories: first, propylene
amine drugs, such as terbinafine, butenafine and naftifine, which exert their bactericidal effects
through inhibiting squalene cyclase, causing the lack of ergosterol and accumulation of squalene. The
second category of imidazole drugs includes miconazole, econazole, clotrimazole, ketoconazole and
bifonazole.
Mechanism:
These synthetic antifungal agents exhibits their action by inhibiting the lanosterol 14α-
demethylation activity of fungal cell, leading to the prevention of the ergosterol synthesis of cell membrane,
changing the cell membrane permeability, and resulting in the loss of important intracellular fungal
material and causing fungal death.
Applications:
At present, Imidazole antifungal agents are commonly used drugs in clinical treatment of
ringworm with extensive clinical applications.
Conclusion:
The present review covers the chemistry and detailed pharmacology aspects of luliconazole.
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Affiliation(s)
- Arun K. Mishra
- Central Facility of Instrumentation, Faculty of Pharmacy, IFTM University, Moradabad, 244001, Uttar Pradesh, India
| | - Arvind Kumar
- Central Facility of Instrumentation, Faculty of Pharmacy, IFTM University, Moradabad, 244001, Uttar Pradesh, India
| | - Harpreet Singh
- Central Facility of Instrumentation, Faculty of Pharmacy, IFTM University, Moradabad, 244001, Uttar Pradesh, India
| | - Shweta Verma
- Central Facility of Instrumentation, Faculty of Pharmacy, IFTM University, Moradabad, 244001, Uttar Pradesh, India
| | - Jagdish K. Sahu
- Central Facility of Instrumentation, Faculty of Pharmacy, IFTM University, Moradabad, 244001, Uttar Pradesh, India
| | - Amrita Mishra
- Central Facility of Instrumentation, Faculty of Pharmacy, IFTM University, Moradabad, 244001, Uttar Pradesh, India
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10
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Distribution and antifungal susceptibility of yeasts isolates from intensive care unit patients. Folia Microbiol (Praha) 2017; 62:525-530. [PMID: 28361459 DOI: 10.1007/s12223-017-0525-8] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2016] [Accepted: 03/24/2017] [Indexed: 10/19/2022]
Abstract
Yeasts frequently colonize non-sterile sites in the body. The aim of the study was to determine distribution in clinical samples and antifungal susceptibility to five antifungals. From January 2013 through June 2015, 800 isolates were obtained from intensive care unit patients. Candida albicans (58.9%), Candida glabrata (20.4%), Candida krusei (8.6%), and Candida parapsilosis (3.6%) were the leading species. Majority of the C. albicans isolates were susceptible to the fluconazole. Elevated voriconazole minimal inhibitory concentrations (MICs) were observed in isolates exhibiting high fluconazole MICs, most frequently in C. glabrata. Isolates with echinocandins MICs suggesting reduced susceptibility were only sporadic cases with the exception of Trichosporon spp. The amphotericin B MICs were slightly higher for some C. krusei.
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Romero-Cerecero O, Islas-Garduño AL, Zamilpa A, Tortoriello J. Effectiveness of Ageratina pichinchensis Extract in Patients with Vulvovaginal Candidiasis. A Randomized, Double-Blind, and Controlled Pilot Study. Phytother Res 2017; 31:885-890. [PMID: 28299831 DOI: 10.1002/ptr.5802] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2016] [Revised: 01/13/2017] [Accepted: 02/25/2017] [Indexed: 11/09/2022]
Abstract
Previous clinical studies have demonstrated the antifungal effectiveness of Ageratina pichinchensis extracts when topically administered to patients with dermatomycosis. The objective of this study was to evaluate the effectiveness and tolerability of a 7% standardized extract of A. pichinchensis (intravaginal) in patients with vulvovaginal candidiasis. The extract was standardized in terms of its encecalin content and administered during 6 days to patients with Candida albicans-associated vulvovaginitis. The positive control group was treated with Clotrimazole (100 mg). On day 7 of the study, a partial evaluation was carried out; it demonstrated that 94.1% of patients treated with Clotrimazole and 100% of those treated with the A. pichinchensis extract referred a decrease or absence of signs and symptoms consistent with vulvovaginal candidiasis. In the final evaluation, 2 weeks after concluding administration, 86.6% of patients in the control group and 81.2% (p = 0.65) of those treated with the A. pichinchensis extract demonstrated therapeutic success. Statistical analysis evidenced no significant differences between the two treatment groups. With the results obtained, it is possible to conclude that the standardized extract from A. pichinchensis, intravaginally administered, showed therapeutic and mycological effectiveness, as well as tolerability, in patients with vulvovaginal candidiasis, without noting statistical differences in patients treated with Clotrimazole. Copyright © 2017 John Wiley & Sons, Ltd.
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Affiliation(s)
- Ofelia Romero-Cerecero
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social (CIBIS-IMSS), Xochitepec, Morelos, Mexico
| | | | - Alejandro Zamilpa
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social (CIBIS-IMSS), Xochitepec, Morelos, Mexico
| | - Jaime Tortoriello
- Centro de Investigación Biomédica del Sur, Instituto Mexicano del Seguro Social (CIBIS-IMSS), Xochitepec, Morelos, Mexico
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Shreaz S, Wani WA, Behbehani JM, Raja V, Irshad M, Karched M, Ali I, Siddiqi WA, Hun LT. Cinnamaldehyde and its derivatives, a novel class of antifungal agents. Fitoterapia 2016; 112:116-31. [PMID: 27259370 DOI: 10.1016/j.fitote.2016.05.016] [Citation(s) in RCA: 139] [Impact Index Per Article: 17.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2015] [Revised: 05/26/2016] [Accepted: 05/28/2016] [Indexed: 02/07/2023]
Abstract
The last few decades have seen an alarming rise in fungal infections, which currently represent a global health threat. Despite extensive research towards the development of new antifungal agents, only a limited number of antifungal drugs are available in the market. The routinely used polyene agents and many azole antifungals are associated with some common side effects such as severe hepatotoxicity and nephrotoxicity. Also, antifungal resistance continues to grow and evolve and complicate patient management, despite the introduction of new antifungal agents. This suitation requires continuous attention. Cinnamaldehyde has been reported to inhibit bacteria, yeasts, and filamentous molds via the inhibition of ATPases, cell wall biosynthesis, and alteration of membrane structure and integrity. In this regard, several novel cinnamaldehyde derivatives were synthesized with the claim of potential antifungal activities. The present article describes antifungal properties of cinnamaldehyde and its derivatives against diverse classes of pathogenic fungi. This review will provide an overview of what is currently known about the primary mode of action of cinnamaldehyde. Synergistic approaches for boosting the effectiveness of cinnamaldehyde and its derivatives have been highlighted. Also, a keen analysis of the pharmacologically active systems derived from cinnamaldehyde has been discussed. Finally, efforts were made to outline the future perspectives of cinnamaldehyde-based antifungal agents. The purpose of this review is to provide an overview of current knowledge about the antifungal properties and antifungal mode of action of cinnamaldehyde and its derivatives and to identify research avenues that can facilitate implementation of cinnamaldehyde as a natural antifungal.
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Affiliation(s)
- Sheikh Shreaz
- Oral Microbiology Laboratory, Faculty of Dentistry, Health Sciences Center, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait.
| | - Waseem A Wani
- Institute of Bioproduct Development, Universiti Teknologi Malaysia, 81310, UTM, Skudai, Johor, Malaysia
| | - Jawad M Behbehani
- Oral Microbiology Laboratory, Faculty of Dentistry, Health Sciences Center, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
| | - Vaseem Raja
- Department of Applied Sciences & Humanities, Jamia Millia Islamia (A Central University), P.O. Box 110025, New Delhi, India
| | - Md Irshad
- Oral Microbiology Laboratory, Faculty of Dentistry, Health Sciences Center, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
| | - Maribasappa Karched
- Oral Microbiology Laboratory, Faculty of Dentistry, Health Sciences Center, Kuwait University, P.O. Box 24923, Safat 13110, Kuwait
| | - Intzar Ali
- Membrane Biology Laboratory, School of Life Sciences, Jawaharlal Nehru University, New Delhi 110 067, India
| | - Weqar A Siddiqi
- Department of Applied Sciences & Humanities, Jamia Millia Islamia (A Central University), P.O. Box 110025, New Delhi, India
| | - Lee Ting Hun
- Institute of Bioproduct Development, Universiti Teknologi Malaysia, 81310, UTM, Skudai, Johor, Malaysia
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Rautenbach M, Troskie AM, Vosloo JA. Antifungal peptides: To be or not to be membrane active. Biochimie 2016; 130:132-145. [PMID: 27234616 DOI: 10.1016/j.biochi.2016.05.013] [Citation(s) in RCA: 123] [Impact Index Per Article: 15.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2016] [Accepted: 05/20/2016] [Indexed: 02/06/2023]
Abstract
Most antifungal peptides (AFPs), if not all, have membrane activity, while some also have alternative targets. Fungal membranes share many characteristics with mammalian membranes with only a few differences, such as differences in sphingolipids, phosphatidylinositol (PI) content and the main sterol is ergosterol. Fungal membranes are also more negative and a better target for cationic AFPs. Targeting just the fungal membrane lipids such as phosphatidylinositol and/or ergosterol by AFPs often translates into mammalian cell toxicity. Conversely, a specific AFP target in the fungal pathogen, such as glucosylceramide, mannosyldiinositol phosphorylceramide or a fungal protein target translates into high pathogen selectivity. However, a lower target concentration, absence or change in the specific fungal target can naturally lead to resistance, although such resistance in turn could result in reduced pathogen virulence. The question is then to be or not to be membrane active - what is the best choice for a successful AFP? In this review we deliberate on this question by focusing on the recent advances in our knowledge on how natural AFPs target fungi.
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Affiliation(s)
- Marina Rautenbach
- BIOPEP Peptide Group, Department of Biochemistry, University of Stellenbosch, South Africa.
| | - Anscha M Troskie
- BIOPEP Peptide Group, Department of Biochemistry, University of Stellenbosch, South Africa
| | - J Arnold Vosloo
- BIOPEP Peptide Group, Department of Biochemistry, University of Stellenbosch, South Africa
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Resistance to Antibiotics and Antifungal Medicinal Products: Can Complementary and Alternative Medicine Help Solve the Problem in Common Infection Diseases? The Introduction of a Dutch Research Consortium. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2015; 2015:521584. [PMID: 26539227 PMCID: PMC4619906 DOI: 10.1155/2015/521584] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 06/29/2015] [Accepted: 08/25/2015] [Indexed: 01/15/2023]
Abstract
The increase of antibiotic resistance worldwide, rising numbers of deaths and costs associated with this, and the fact that hardly any new antimicrobial drugs have been developed during the last decade have increased the interest in Complementary and Alternative Medicine (CAM) therapeutic interventions, if proven safe and effective.
Observational studies on clinical CAM practices demonstrate positive effects of treatment of infections with CAM therapies (clinical effects, patient satisfaction) in combination with small percentages of antibiotics prescription. However, Cochrane reviews and other studies demonstrate that in most instances the quality of clinical trials on CAM treatment of infections is currently too low to provide sufficient evidence. Therefore a Dutch consortium on (in vitro and clinical) scientific research on CAM and antibiotic resistance has been formed. The aim and objective of the consortium is to establish an enduring partnership and to develop expertise to further develop and investigate safe and effective CAM treatments for infectious diseases of humans (and animals). A first ongoing project on the development of safe and effective biobased CAM antimycotics in women with (recurrent) vaginal candidiasis infection is introduced.
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Anju S, Kumar NS, Krishnakumar B, Kumar BSD. Synergistic combination of violacein and azoles that leads to enhanced killing of major human pathogenic dermatophytic fungi Trichophyton rubrum. Front Cell Infect Microbiol 2015; 5:57. [PMID: 26322275 PMCID: PMC4531294 DOI: 10.3389/fcimb.2015.00057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2015] [Accepted: 07/21/2015] [Indexed: 11/15/2022] Open
Abstract
Superficial mycoses caused by dermatophytic fungi such as Trichophyton rubrum represent the most common type of worldwide human infection affecting various keratinized tissues in our body such as the skin, hair, and nails, etc. The dermatophytic infection is a significant public health threat due to its persistent nature and high recurrence rates, and thus alternative treatments to cure this fungal infection are urgently required. The present study mainly focused on the synergistic activity of violacein with four azole drugs (ketoconazole, fluconazole, clotrimazole, and itraconazole) against T. rubrum. The synergistic antifungal activities of violacein and azoles were measured by checkerboard microdilution and time-kill assays. In our study, combinations of violacein and azoles predominantly recorded synergistic effect (FIC index < 0.5). Significant synergistic value was recorded by the combination of violacein and clotrimazole. Time-kill assay by the combination of MIC concentration of violacein and azoles recorded that the growth of the T. rubrum was significantly arrested after 4–12 h of treatment. The combination of violacein and azoles leads to the enhanced inhibition of mycelial growth and conidial germination. Moreover combination enhanced the rate of release of intracellular materials. Morphological changes by SEM analysis were also prominent with the combination. A normal human cell line [Foreskin (FS) normal fibroblast] was used to check the cytotoxicity of violacein. Interestingly violacein recorded no cytotoxicity up to 100 μg/ml. The in vitro synergistic effect of violacein and azoles against clinically relevant fungi, T. rubrum, is reported here for the first time. Finally, our findings support the potential use of the violacein as an antifungal agent especially against dermatophytic fungi T. rubrum.
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Affiliation(s)
- S Anju
- Environmental Technology, CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, India
| | - Nishanth S Kumar
- Agroprocessing and Natural Products Division, CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, India
| | - B Krishnakumar
- Environmental Technology, CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, India
| | - B S Dileep Kumar
- Agroprocessing and Natural Products Division, CSIR-National Institute for Interdisciplinary Science and Technology Thiruvananthapuram, India
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Pereira FDO, Mendes JM, Lima IO, Mota KSDL, Oliveira WAD, Lima EDO. Antifungal activity of geraniol and citronellol, two monoterpenes alcohols, against Trichophyton rubrum involves inhibition of ergosterol biosynthesis. PHARMACEUTICAL BIOLOGY 2015; 53:228-234. [PMID: 25414073 DOI: 10.3109/13880209.2014.913299] [Citation(s) in RCA: 61] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
CONTEXT Trichophyton rubrum is the most common fungus causing chronic dermatophytosis in humans. Antifungal activity of promising agents is of great interest. Geraniol and citronellol are monoterpenes with antimicrobial properties. OBJECTIVE This study aimed to investigate the inhibitory effects and possible mechanism of antifungal activity of geraniol and citronellol against strains of T. rubrum. MATERIALS AND METHODS The minimum inhibitory concentration (MIC) of each drug against 14 strains was determined by broth microdilution. The effects of the drugs on dry mycelial weight, conidial germination, infectivity on human nail fragments, and morphogenesis of T. rubrum were analyzed. The effects on the cell wall (test with sorbitol) and cell membrane (release of intracellular material and ergosterol biosynthesis) were investigated. RESULTS MIC values of geraniol ranged between 16 and 256 µg/mL while citronellol showed MIC values from 8 to 1024 µg/mL. The drugs (MIC and 2 × MIC) inhibited the mycelial growth, conidia germination, and fungal growth on nail fragments. The drugs (half of MIC) induced the formation of wide, short, and crooked hyphae in T. rubrum morphology. With sorbitol, geraniol MIC was increased by 64-fold and citronellol by 32-fold. The drugs caused leakage of intracellular material and inhibited ergosterol biosynthesis. DISCUSSION The results suggest that the drugs damage cell wall and cell membrane of T. rubrum through a mechanism that seems to involve the inhibition of the ergosterol biosynthesis. CONCLUSION This study confirms that geraniol and citronellol can be regarded as potential drugs for controlling T. rubrum growth, with great potential against agents of dermatophytosis.
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Affiliation(s)
- Fillipe de Oliveira Pereira
- Unidade Acadêmica de Saúde, Centro de Educação e Saúde, Universidade Federal de Campina Grande , Cuité , Brasil and
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Jerzsele Á, Gyetvai B, Csere I, Gálfi P. Biofilm formation in Malassezia pachydermatis strains isolated from dogs decreases susceptibility to ketoconazole and itraconazole. Acta Vet Hung 2014; 62:473-80. [PMID: 25410389 DOI: 10.1556/avet.2014.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Malassezia pachydermatis is a commonly isolated yeast in veterinary dermatology that can produce biofilms in vitro and in vivo, lowering its susceptibility to antimicrobial drugs. The aim of this study was to determine and compare the in vitro susceptibility of planktonic cells and biofilms of M. pachydermatis isolates to ketoconazole and itraconazole. The presence of biofilm formation was confirmed by crystal violet staining and absorbance measurement at 595 nm wavelength, and by a scanning electron microscopy method. Cell viability was determined by the Celltiter 96 Aqueous One solution assay containing a water-soluble tetrazolium compound (MTS) with absorbance measurement at 490 nm. Planktonic cell minimum inhibitory concentrations (MICs) and minimum fungicidal concentrations (MFCs) of ketoconazole and itraconazole were very low: MIC90 and MFC90 were 0.032 and 0.125 μg/ml for ketoconazole, while 0.063 and 0.25 μg/ml for itraconazole, respectively. Also, the half maximal effective concentrations (EC50) of itraconazole were higher for planktonic cells and biofilms compared to ketoconazole. The EC50 values of ketoconazole were 18-169 times higher and those of itraconazole 13-124 times higher for biofilms than for planktonic cells. Biofilm EC50 levels exceeded MICs 103-2060 times for ketoconazole and 84-1400 times for itraconazole. No significant difference was found between these values of the two substances. In conclusion, biofilms of all examined M. pachydermatis strains were much less susceptible to ketoconazole and itraconazole than their planktonic forms.
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Affiliation(s)
- Ákos Jerzsele
- 1 Szent István University Department of Pharmacology and Toxicology, Faculty of Veterinary Sciences István u. 2 H-1078 Budapest Hungary
| | - Béla Gyetvai
- 2 Alpha-Vet Veterinary Ltd. Székesfehérvár Hungary
| | | | - Péter Gálfi
- 1 Szent István University Department of Pharmacology and Toxicology, Faculty of Veterinary Sciences István u. 2 H-1078 Budapest Hungary
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Krein SR, Lindsey JC, Blaze CA, Wetmore LA. Evaluation of risk factors, including fluconazole administration, for prolonged anesthetic recovery times in horses undergoing general anesthesia for ocular surgery: 81 cases (2006-2013). J Am Vet Med Assoc 2014; 244:577-81. [PMID: 24548232 DOI: 10.2460/javma.244.5.577] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE--To determine risk factors for prolonged anesthetic recovery time in horses that underwent general anesthesia for ocular surgery. DESIGN--Retrospective cohort study. ANIMALS--81 horses that underwent general anesthesia for ocular surgery between 2006 and 2013. PROCEDURES--Descriptive information recorded included the ocular procedure performed, concurrent fluconazole treatments, analgesic and anesthetic agents administered, procedure duration, use of sedation for recovery, and recovery time. Data were analyzed for associations between recovery time and other variables. RESULTS--81 horses met inclusion criteria. In 72 horses, anesthesia was induced with ketamine and midazolam; 16 horses treated concurrently with fluconazole had significantly longer mean recovery time (109 minutes [95% confidence interval {CI}, 94 to 124 minutes]) than did 56 horses that were not treated with fluconazole (50 minutes [95% CI, 44 to 55 minutes]). In 9 horses anesthetized with a protocol that included ketamine but did not include midazolam, there was no difference between mean recovery time in horses that either received (59 minutes [95% CI, 36 to 81 minutes]; n = 5) or did not receive (42 minutes [95% CI, 16 to 68 minutes]; 4) fluconazole. Other variables identified as risk factors for prolonged recovery included duration of anesthesia and use of acepromazine for premedication. CONCLUSIONS AND CLINICAL RELEVANCE--Fluconazole administration was associated with prolonged anesthetic recovery time in horses when ketamine and midazolam were used to induce anesthesia for ocular surgery. Duration of anesthesia and premedication with acepromazine were also identified as risk factors for prolonged recovery time.
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Affiliation(s)
- Stephanie R Krein
- Department of Clinical Sciences, Cummings School of Veterinary Medicine, Tufts University, North Grafton, MA 01536
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Krauss J, Müller C, Kießling J, Richter S, Staudacher V, Bracher F. Synthesis and Biological Evaluation of NovelN-Alkyl Tetra- and Decahydroisoquinolines: Novel Antifungals that Target Ergosterol Biosynthesis. Arch Pharm (Weinheim) 2014; 347:283-90. [DOI: 10.1002/ardp.201300338] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/06/2013] [Revised: 10/15/2013] [Accepted: 10/18/2013] [Indexed: 11/08/2022]
Affiliation(s)
- Jürgen Krauss
- Department of Pharmacy, Center for Drug Research; Ludwig-Maximilians-University Munich; Munich Germany
| | - Christoph Müller
- Department of Pharmacy, Center for Drug Research; Ludwig-Maximilians-University Munich; Munich Germany
| | - Julia Kießling
- Department of Pharmacy, Center for Drug Research; Ludwig-Maximilians-University Munich; Munich Germany
| | - Sabine Richter
- Department of Pharmacy, Center for Drug Research; Ludwig-Maximilians-University Munich; Munich Germany
| | - Verena Staudacher
- Department of Pharmacy, Center for Drug Research; Ludwig-Maximilians-University Munich; Munich Germany
| | - Franz Bracher
- Department of Pharmacy, Center for Drug Research; Ludwig-Maximilians-University Munich; Munich Germany
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20
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Integration of methods in cheminformatics and biocalorimetry for the design of trypanosomatid enzyme inhibitors. Future Med Chem 2014; 6:17-33. [DOI: 10.4155/fmc.13.185] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Background: The enzyme GAPDH, which acts in the glycolytic pathway, is seen as a potential target for pharmaceutical intervention of Chagas disease. Results: Herein, we report the discovery of new Trypanosoma cruzi GAPDH (TcGAPDH) inhibitors from target- and ligand-based virtual screening protocols using isothermal titration calorimetry (ITC) and molecular dynamics. Molecular dynamics simulations were used to gain insight on the binding poses of newly identified inhibitors acting at the TcGAPDH substrate (G3P) site. Conclusion: Nequimed125, the most potent inhibitor to act upon TcGAPDH so far, which sits on the G3P site without any contact with the co-factor (NAD+) site, underpins the result obtained by ITC that it is a G3P-competitive inhibitor. Molecular dynamics simulation provides biding poses of TcGAPDH inhibitors that correlate with mechanisms of inhibition observed by ITC. Overall, a new class of dihydroindole compounds that act upon TcGAPDH through a competitive mechanism of inhibition as proven by ITC measurements also kills T. cruzi.
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Krojer M, Müller C, Bracher F. Steroidomimetic Aminomethyl Spiroacetals as Novel Inhibitors of the Enzyme Δ8,7-Sterol Isomerase in Cholesterol Biosynthesis. Arch Pharm (Weinheim) 2013; 347:108-22. [DOI: 10.1002/ardp.201300296] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2013] [Revised: 09/16/2013] [Accepted: 09/17/2013] [Indexed: 11/10/2022]
Affiliation(s)
- Melanie Krojer
- Department of Pharmacy - Center for Drug Research; Ludwig-Maximilians-University of Munich; Munich Germany
| | - Christoph Müller
- Department of Pharmacy - Center for Drug Research; Ludwig-Maximilians-University of Munich; Munich Germany
| | - Franz Bracher
- Department of Pharmacy - Center for Drug Research; Ludwig-Maximilians-University of Munich; Munich Germany
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de Oliveira Pereira F, Mendes JM, de Oliveira Lima E. Investigation on mechanism of antifungal activity of eugenol againstTrichophyton rubrum. Med Mycol 2013. [DOI: 10.3109/13693786.2012.742966] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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23
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Emami S, Banipoulad T, Irannejad H, Foroumadi A, Falahati M, Ashrafi-Khozani M, Sharifynia S. Imidazolylchromanones containing alkyl side chain as lanosterol 14α-demethylase inhibitors: synthesis, antifungal activity and docking study. J Enzyme Inhib Med Chem 2013; 29:263-71. [DOI: 10.3109/14756366.2013.776554] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Saeed Emami
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences
SariIran
| | - Touba Banipoulad
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences
SariIran
| | - Hamid Irannejad
- Department of Medicinal Chemistry and Pharmaceutical Sciences Research Center, Faculty of Pharmacy, Mazandaran University of Medical Sciences
SariIran
| | - Alireza Foroumadi
- Department of Medicinal Chemistry, Faculty of Pharmacy and Drug Design and Development Research Center
| | - Mehraban Falahati
- Department of Parasitology, Faculty of Medicine, Tehran University of Medical Sciences
TehranIran
| | - Mahtab Ashrafi-Khozani
- Department of Parasitology, Faculty of Medicine, Tehran University of Medical Sciences
TehranIran
| | - Somaye Sharifynia
- Department of Parasitology, Faculty of Medicine, Tehran University of Medical Sciences
TehranIran
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