1
|
El-Gazzar N, Elez RMMA, Attia ASA, Abdel-Warith AWA, Darwish MM, Younis EM, Eltahlawi RA, Mohamed KI, Davies SJ, Elsohaby I. Antifungal and antibiofilm effects of probiotic Lactobacillus salivarius, zinc nanoparticles, and zinc nanocomposites against Candida albicans from Nile tilapia ( Oreochromis niloticus), water and humans. Front Cell Infect Microbiol 2024; 14:1358270. [PMID: 38895734 PMCID: PMC11183309 DOI: 10.3389/fcimb.2024.1358270] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2023] [Accepted: 04/29/2024] [Indexed: 06/21/2024] Open
Abstract
Introduction Candida albicans (C. albicans) can form biofilms; a critical virulence factor that provides effective protection from commercial antifungals and contributes to public health issues. The development of new antifungal therapies, particularly those targeting biofilms, is imperative. Thus, this study was conducted to investigate the antifungal and antibiofilm effects of Lactobacillus salivarius (L. salivarius), zinc nanoparticles (ZnNPs) and nanocomposites (ZnNCs) on C. albicans isolates from Nile tilapia, fish wash water and human fish sellers in Sharkia Governorate, Egypt. Methods A cross-sectional study collected 300 samples from tilapia, fish wash water, and fish sellers (100 each). Probiotic L. salivarius was immobilized with ZnNPs to synthesize ZnNCs. The study assessed the antifungal and antibiofilm activities of ZnNPs, L. salivarius, and ZnNCs compared to amphotericin (AMB). Results Candida spp. were detected in 38 samples, which included C. albicans (42.1%), C. glabrata (26.3%), C. krusei (21.1%), and C. parapsilosis (10.5%). A total of 62.5% of the isolates were resistant to at least one antifungal agent, with the highest resistance to nystatin (62.5%). However, 75% of the isolates were highly susceptible to AMB. All C. albicans isolates exhibited biofilm-forming capabilities, with 4 (25%) isolates showing strong biofilm formation. At least one virulence-associated gene (RAS1, HWP1, ALS3, or SAP4) was identified among the C. albicans isolates. Probiotics L. salivarius, ZnNPs, and ZnNCs displayed antibiofilm and antifungal effects against C. albicans, with ZnNCs showing significantly higher inhibitory activity. ZnNCs, with a minimum inhibitory concentration (MIC) of 10 µg/mL, completely reduced C. albicans biofilm gene expression. Additionally, scanning electron microscopy images of C. albicans biofilms treated with ZnNCs revealed asymmetric, wrinkled surfaces, cell deformations, and reduced cell numbers. Conclusion This study identified virulent, resistant C. albicans isolates with strong biofilm-forming abilities in tilapia, water, and humans, that pose significant risks to public health and food safety.
Collapse
Affiliation(s)
- Nashwa El-Gazzar
- Department of Botany and Microbiology, Faculty of Science, Zagazig University, Zagazig, Egypt
| | - Rasha M. M. Abou Elez
- Department of Zoonoses, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | - Amira S. A. Attia
- Department of Veterinary Public Health, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| | | | - Manal M. Darwish
- Medical Microbiology Department, Faculty of Medicine, Ain Shams University, Cairo, Egypt
- Microbiology and Immunology Department, Faculty of Pharmacy, October University for Modern Sciences and Arts, Giza, Egypt
| | - Elsayed M. Younis
- Department of Zoology, College of Science, King Saud University, Riyadh, Saudi Arabia
| | - Rehab A. Eltahlawi
- Microbiology and Immunology Department, Faculty of Medicine, Zagazig University, Zagazig, Egypt
| | | | - Simon J. Davies
- Aquaculture Nutrition Research Unit ANRU, Carna Research Station, Ryan Institute, College of Science and Engineering, University of Galway, Galway, Ireland
| | - Ibrahim Elsohaby
- Department of Infectious Diseases and Public Health, Jockey Club College of Veterinary Medicine and Life Sciences, City University of Hong Kong, Hong Kong, Hong Kong SAR, China
- Centre for Applied One Health Research and Policy Advice (OHRP), City University of Hong Kong, Hong Kong, Hong Kong SAR, China
- Department of Animal Medicine, Faculty of Veterinary Medicine, Zagazig University, Zagazig, Egypt
| |
Collapse
|
2
|
Contreras-Martínez OI, Sierra-Quiroz D, Angulo-Ortíz A. Antibacterial and Antibiofilm Potential of Ethanolic Extracts of Duguetia vallicola (Annonaceae) against in-Hospital Isolates of Pseudomonas aeruginosa. PLANTS (BASEL, SWITZERLAND) 2024; 13:1412. [PMID: 38794482 PMCID: PMC11126144 DOI: 10.3390/plants13101412] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2024] [Revised: 05/08/2024] [Accepted: 05/15/2024] [Indexed: 05/26/2024]
Abstract
Pseudomonas aeruginosa is an opportunistic pathogen that is especially dominant in people with cystic fibrosis; the drug resistance expressed by this pathogen and its capacity for adaptation poses a significant challenge to its treatment and control, thereby increasing morbidity and mortality rates globally. In this sense, the search for new treatment alternatives is imminent today, with products of plant origin being an excellent alternative for use. The objective of this research was to evaluate the antibacterial and antibiofilm potential and to explore the possible effect of ethanolic extracts from the wood and bark of Duguetia vallicola on the cell membrane. Microdilution assays showed the inhibition of bacterial growth by more than 50%, with the lowest concentration (62.5 μg/mL) of both extracts evaluated. Furthermore, we report the ability of both extracts to inhibit mature biofilms, with inhibition percentages between 48.4% and 93.7%. Intracellular material leakage experiments (260/280 nm), extracellular pH measurements, and fluorescence microscopy with acridine orange (AO) and ethidium bromide (EB) showed cell membrane damage. This indicates that the antibacterial action of ethanolic extracts of D. vallicola is associated with damage to the integrity of the cell membrane and consequent death of these pathogens. These results serve as a reference for future studies in establishing the mechanisms of action of these extracts.
Collapse
Affiliation(s)
- Orfa Inés Contreras-Martínez
- Biology Department, Faculty of Basic Sciences, University of Córdoba, Montería 230002, Colombia; (O.I.C.-M.); (D.S.-Q.)
| | - Daniela Sierra-Quiroz
- Biology Department, Faculty of Basic Sciences, University of Córdoba, Montería 230002, Colombia; (O.I.C.-M.); (D.S.-Q.)
| | - Alberto Angulo-Ortíz
- Chemistry Department, Faculty of Basic Sciences, University of Córdoba, Montería 230002, Colombia
| |
Collapse
|
3
|
Gao Q, Qi J, Tan Y, Ju J. Antifungal mechanism of Angelica sinensis essential oil against Penicillium roqueforti and its application in extending the shelf life of bread. Int J Food Microbiol 2024; 408:110427. [PMID: 37827052 DOI: 10.1016/j.ijfoodmicro.2023.110427] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 07/07/2023] [Accepted: 10/03/2023] [Indexed: 10/14/2023]
Abstract
There are a variety of reports on the application of Angelica sinensis essential oil (ASEO) in the biomedical field. However, the antifungal mechanism of ASEO has not been reported. In this study, the antifungal mechanism of ASEO against Penicillium roqueforti was investigated by proteomics and genomics. ASEO can increase the permeability of P. roqueforti cell membrane and decrease the content of lipid and trehalose. With the increase of glycerol content, the HOG signaling pathway can be upregulated. Consistent with the above phenotypic changes, proteomics confirmed that ASEO treatment inhibited the steroid synthesis pathway of P. roqueforti. The significant down-regulation of ERG4, ERG6, ERG25, SMT1, and FDFT1 gene expression confirmed this conclusion. Cluster+activates the MAPK and UPP signaling pathways and ultimately leads to cell apoptosis. The bread shelf life experiment showed that ASEO could extend the shelf life of bread up to day 7. This study provides new evidence for the antifungal activity of ASEO against P. roqueforti and will promote the use of ASEO in the preservation of food and agricultural products.
Collapse
Affiliation(s)
- Qingchao Gao
- Special Food Research Institute, Qingdao Agricultural University, Qingdao 266109, People's Republic of China; Qingdao Special Food Research Institute, Qingdao 266109, People's Republic of China; Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China; Shandong Technology Innovation Center of Special Food, Qingdao, 266109, People's Republic of China
| | - Jingjing Qi
- Special Food Research Institute, Qingdao Agricultural University, Qingdao 266109, People's Republic of China; Qingdao Special Food Research Institute, Qingdao 266109, People's Republic of China; Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China; Shandong Technology Innovation Center of Special Food, Qingdao, 266109, People's Republic of China
| | - Yulong Tan
- Special Food Research Institute, Qingdao Agricultural University, Qingdao 266109, People's Republic of China; Qingdao Special Food Research Institute, Qingdao 266109, People's Republic of China; Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China; Shandong Technology Innovation Center of Special Food, Qingdao, 266109, People's Republic of China
| | - Jian Ju
- Special Food Research Institute, Qingdao Agricultural University, Qingdao 266109, People's Republic of China; Qingdao Special Food Research Institute, Qingdao 266109, People's Republic of China; Key Laboratory of Special Food Processing (Co-construction by Ministry and Province), Ministry of Agriculture Rural Affairs, People's Republic of China; Shandong Technology Innovation Center of Special Food, Qingdao, 266109, People's Republic of China.
| |
Collapse
|
4
|
Zapata-Zapata C, Rojas-López M, García LT, Quintero W, Terrón MC, Luque D, Mesa-Arango AC. Lippia origanoides Essential Oil or Thymol in Combination with Fluconazole Produces Damage to Cells and Reverses the Azole-Resistant Phenotype of a Candida tropicalis Strain. J Fungi (Basel) 2023; 9:888. [PMID: 37754996 PMCID: PMC10532872 DOI: 10.3390/jof9090888] [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: 05/19/2023] [Revised: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 09/28/2023] Open
Abstract
Candida tropicalis is one of the most pathogenic species within the genus. Increased antifungal resistance has been reported, which is in part due to the organism's ability to form biofilms. In natural products derived from plants, such as essential oils (EOs) or their major components, there is significant potential to develop new antifungals or to both enhance the efficacy and reduce the toxicity of conventional antifungals. This study aimed to evaluate the effect of combining an EO of Lippia origanoides or thymol with fluconazole on an azole-resistant C. tropicalis strain. Synergism was observed in the combination of fluconazole with the EO and with thymol, and minimal inhibitory concentrations for fluconazole decreased at least 32-fold. As a consequence of the synergistic interactions, mitochondrial membrane potential was reduced, and mitochondrial superoxide production increased. Alteration in nuclear morphology, cell surface, and ultrastructure was also observed. In conclusion, the synergistic interaction between L. origanoides EO or thymol with fluconazole reverted the azole-resistant C. tropicalis phenotype. These findings suggest that L. origanoides EO or thymol alone, or in combination with fluconazole, have the potential for development as antifungal therapies for this yeast, including resistant strains.
Collapse
Affiliation(s)
- Carolina Zapata-Zapata
- Academic Group of Epidemiology, Faculty of Medicine, University of Antioquia, Medellín 050010, Colombia;
| | - Mauricio Rojas-López
- Group of Cellular Immunology and Immunogenetics (GICIG), Faculty of Medicine, University of Antioquia, Medellín 050010, Colombia;
- Flow Cytometry Unit, University of Antioquia, Medellín 050010, Colombia
| | - Liliana T. García
- Postgraduate Department of Infectious Disease, University of Santander, Bucaramanga 680006, Colombia; (L.T.G.); (W.Q.)
| | - Wendy Quintero
- Postgraduate Department of Infectious Disease, University of Santander, Bucaramanga 680006, Colombia; (L.T.G.); (W.Q.)
| | - María C. Terrón
- Electron Microscopy Unit, Scientific-Technical Central Units, Institute of Health Carlos III (ISCIII), 28220 Madrid, Spain; (M.C.T.); (D.L.)
| | - Daniel Luque
- Electron Microscopy Unit, Scientific-Technical Central Units, Institute of Health Carlos III (ISCIII), 28220 Madrid, Spain; (M.C.T.); (D.L.)
| | - Ana C. Mesa-Arango
- Academic Group of Epidemiology, Faculty of Medicine, University of Antioquia, Medellín 050010, Colombia;
| |
Collapse
|
5
|
Sasidharan S, Nishanth KS, Nair HJ. A semi purified hydroalcoholic fraction from Caesalpinia bonduc seeds causes ergosterol biosynthesis inhibition in Candida albicans resulting in cell membrane damage. Front Pharmacol 2023; 14:1189241. [PMID: 37377930 PMCID: PMC10291067 DOI: 10.3389/fphar.2023.1189241] [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: 03/18/2023] [Accepted: 05/22/2023] [Indexed: 06/29/2023] Open
Abstract
Candida species are currently developing resistance to prevailing commercially available drugs, which raises an instantaneous need to discover novel antifungals. To cope with this shocking situation, phytochemicals are the richest, safest, and most potent source of excellent antimicrobials with broad-spectrum activity. The aim of the current study is to explore the anticandidal potential of the various fractions purified from the hydroalcoholic extract of C. bonduc seed. Out of five fractions purified from the hydroalcoholic extract, fraction 3 (Fr. 3) recorded the best activity against C. albicans (8 μg/mL) and thus this species was chosen for further mechanism of action studies. The phytochemical examination reveals that Fr. 3 was found to contain steroids and triterpenoids. This was further supported by LC-QTOF-MS and GCMS analyses. Our findings show that Fr. 3 targets the ergosterol biosynthesis pathway in C. albicans by inhibiting the lanosterol 14-α demethylase enzyme and downregulating expression of its related gene ERG11. Molecular docking outcomes disclosed favorable structural dynamics of the compounds, implying that the compounds present in Fr. 3 would be able to successfully bind to the lanosterol 14-α demethylase, as evidenced by the docked compounds' strong interaction with the target enzyme's amino acid residues. Considering virulence factors, the Fr. 3 recorded significant antibiofilm activity as well as germ-tube reduction potential. Furthermore, Fr. 3 enhances the production of intracellular reactive oxygen species (ROS). This suggests that the antifungal activity of Fr. 3 was associated with membrane damage and the induction of ROS production, resulting in cell death. Fluorescence microscopic analysis of PI stained Candida further showed changes in the plasma membrane permeability, which causes severe loss of intracellular material and osmotic balance. This was demonstrated by the potassium ion leakage and release of genetic materials. Finally, the erythrocyte lysis assay confirmed the low cytotoxicity of Fr. 3. Both in silico and in vitro results suggest that Fr. 3 has the potential to propel forward novel antifungal drug discovery programmes.
Collapse
Affiliation(s)
- Shan Sasidharan
- 1Department of R&D, Pankajakasthuri Herbal Research Foundation, Pankajakasthuri Ayurveda Medical College Campus, Trivandrum, Kerala, India
| | - Kumar S. Nishanth
- 1Department of R&D, Pankajakasthuri Herbal Research Foundation, Pankajakasthuri Ayurveda Medical College Campus, Trivandrum, Kerala, India
| | - Hareendran. J Nair
- 2Department of R&D, Pankajakasthuri Herbals India Pvt Ltd., Pankajakasthuri Ayurveda Medical College Campus, Trivandrum, Kerala, India
| |
Collapse
|
6
|
Liu Y, Peng J, Huang L, Li B, Ge C, Liu S, Jiang Y. (+)-/(-)-Rutabenzofuran A and (+)-/(-)- Rutabenzofuran B: Two unprecedented pairs of Z/E isomeric benzofuran enantiomers from the aerial part of Ruta graveolens L. PHYTOCHEMISTRY 2023; 210:113677. [PMID: 37059286 DOI: 10.1016/j.phytochem.2023.113677] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2022] [Revised: 03/27/2023] [Accepted: 04/11/2023] [Indexed: 06/19/2023]
Abstract
Two pairs of Z/E isomeric benzofuran enantiomers possessing unprecedented carbon skeletons featuring ring cleavage and addition reactions in the α-pyrone ring of furocoumarin, named rutabenzofuran A [(+)-1 and (-)-1], and rutabenzofuran B [(+)-2 and (-)-2], respectively, were isolated as minor compounds from the water extract of the aerial part of Ruta graveolens L. Their structures were determined by extensive spectroscopic data analysis. The absolute configurations were assigned by comparing the optical rotation with previous research and the experimental circular dichroism (CD) spectra with the calculated electronic CD (ECD) spectra. (-)-1, (+)-2, and (-)-2 were evaluated for antibacterial, anticoagulant, anticancer, and acetylcholinesterase (AChE) inhibitory activities. No anticancer or anticoagulant activities were observed, yet (-)-2 exhibited weak antibacterial activity against Salmonella enterica subsp. Enterica. At the same time, (-)-1, (+)-2, and (-)-2 displayed weak inhibitory activity on AChE.
Collapse
Affiliation(s)
- Yanyang Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Jing Peng
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Ling Huang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Bichen Li
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Chengyu Ge
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China
| | - Shao Liu
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China.
| | - Yueping Jiang
- Department of Pharmacy, Xiangya Hospital, Central South University, Changsha, 410008, China; Institute for Rational and Safe Medication Practices, National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, 410008, China.
| |
Collapse
|
7
|
Handayani S, Nurdiana N, Winarsih S, Tri Endharti A. The Effects of Holothurin and Caspofungin on the Vaginal Cell Inflammation Parameters of the Rattus norvegicus Strain Post Induction of Candida albicans. Infect Drug Resist 2023; 16:2501-2509. [PMID: 37138836 PMCID: PMC10150739 DOI: 10.2147/idr.s400314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Accepted: 04/01/2023] [Indexed: 05/05/2023] Open
Abstract
Purpose Candida albicans (C. albicans) is a fungus that causes superficial and invasive candidiasis in its host. Caspofungin, has been widely used as a synthetic antifungal, whereas holothurin has been shown to have potential as a natural antifungal. The purpose of this study was to see how holothurin and caspofungin affected the number of C. albicans's colonies, LDH levels, and the number of inflammatory cells in vagina of Rattus norvegicus. Patients and Methods Design of this research is using posttest only with control group design with 48 Rattus norvegicus Wistar strains used in this study were divided into six treatment groups. Each group was divided into three-time intervals of 12, 24, and 48 hours. LDH markers were tested using ELISA, inflammatory cells were counted manually, and the number of colonies was calculated using colonymetry before being diluted with NaCl 0.9% and planted in sabouraud dextrose agar (SDA). Results According to the findings, inflammatory cells in the treatment of holothurin (48-hours) had an OR of 1.68 CI (-0.79-4.16) P = 0.09 and caspofungin had an OR of 4.18 CI (1.26-9.63) P = 0.09. Meanwhile, LDH in the holothurin (48-hour) treatment obtained OR 348, CI (286-410), P=0.03, and Caspofungin OR 393, CI (277-508), P=0.03. Colonies were obtained with zero numbers in the holothurin treatment (48 hours) and with Caspofungin OR 393, CI (273-508) P=0.00. Conclusion Holothurin and caspofungin administration reduced the number of C. albicans colonies and the number of inflammatory cells (P 0.05), implying that holothurin and caspofungin could prevent C. albicans infection.
Collapse
Affiliation(s)
- Sri Handayani
- Doctoral Program of Medical Science Department, Faculty of Medicine, Brawijaya University, Malang, Indonesia
- Department of Midwifery of Aisyiyah, Institution of Surakarta University, Surakarta, Province of Middle Java, Indonesia
- Correspondence: Sri Handayani, Department of Midwifery of Aisyiyah, Institution of Surakarta University, Surakarta, Middle Java State, 57146, Indonesia, Tel +62 816-4252-588, Email
| | - Nurdiana Nurdiana
- Department of Pharmacology, Faculty of Medicine, Brawijaya University, Malang, Province of East Java, Indonesia
| | - Sri Winarsih
- Department of Pharmacy, Faculty of Medicine, Brawijaya University, Malang, Province of East Java, Indonesia
| | - Agustina Tri Endharti
- Department of Parasitology, Faculty of Medicine, Brawijaya University, Malang, Province of East Java, Indonesia
| |
Collapse
|
8
|
Antibacterial Screening of Isoespintanol, an Aromatic Monoterpene Isolated from Oxandra xylopioides Diels. Molecules 2022; 27:molecules27228004. [PMID: 36432105 PMCID: PMC9692887 DOI: 10.3390/molecules27228004] [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: 10/16/2022] [Revised: 11/16/2022] [Accepted: 11/16/2022] [Indexed: 11/19/2022] Open
Abstract
The incidence of nosocomial infections, as well as the high mortality and drug resistance expressed by nosocomial pathogens, especially in immunocompromised patients, poses significant medical challenges. Currently, the efficacy of plant compounds with antimicrobial potential has been reported as a promising alternative therapy to traditional methods. Isoespintanol (ISO) is a monoterpene with high biological activity. Using the broth microdilution method, the antibacterial activity of ISO was examined in 90 clinical isolates, which included 14 different species: (Escherichia coli (38), Pseudomonas aeruginosa (12), Klebsiella pneumoniae (13), Acinetobacter baumannii (3), Proteus mirabilis (7), Staphylococcus epidermidis (3), Staphylococcus aureus (5), Enterococcus faecium (1), Enterococcus faecalis (1), Stenotrophomonas maltophilia (2), Citrobacter koseri (2), Serratia marcescens (1), Aeromonas hydrophila (1), and Providencia rettgeri (1). MIC90 minimum inhibitory concentration values ranged from 694.3 to 916.5 µg/mL and MIC50 values from 154.2 to 457.3 µg/mL. The eradication of mature biofilms in P. aeruginosa after 1 h of exposure to ISO was between 6.6 and 77.4%, being higher in all cases than the percentage of biofilm eradication in cells treated with ciprofloxacin, which was between 4.3 and 67.5%. ISO has antibacterial and antibiofilm potential against nosocomial bacteria and could serve as an adjuvant in the control of these pathogens.
Collapse
|
9
|
Antifungal potential of isoespintanol extracted from Oxandra xylopioides diels (Annonaceae) against intrahospital isolations of Candida SPP. Heliyon 2022; 8:e11110. [PMID: 36303897 PMCID: PMC9593293 DOI: 10.1016/j.heliyon.2022.e11110] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2021] [Revised: 04/24/2022] [Accepted: 10/11/2022] [Indexed: 11/06/2022] Open
Abstract
The aim of this study was to evaluate the antifungal activity of isoespintanol (ISO) extracted from Oxandra xylopioides Diels (Annonaceae) against clinical isolates of Candida spp. Isoespintanol was obtained from the petroleum benzine extract of the leaves and was identified by nuclear magnetic resonance (NMR) and mass spectrometry (MS). For antifungal activity experiments, the broth microdilution method was used. The results show an inhibitory effect against Candida spp., with minimum inhibitory concentration (MIC) values between 450.4-503.3 μg/mL. Furthermore, the inhibitory effect of ISO against fungal biofilms is highlighted, even in some cases, greater than the effect shown by amphotericin B (AFB) and in others, where AFB showed no effect. Assays with fluorescent staining with acridine orange (AO) and ethidium bromide (EB), transmission electron microscopy (TEM), Evans blue, measurement of extracellular pH and leakage of intracellular material, evidenced damage at the level of fungal membranes and general cell damage, when cells were exposed to ISO, compared to untreated cells. The results of this research, serve as the basis for future studies in the establishment of the mechanisms of antifungal action of ISO, which could serve as an adjunct in the treatment of infections by these yeasts.
Collapse
|
10
|
Inhibitory Effect and Mechanism of Dill Seed Essential Oil on Neofusicoccum parvum in Chinese Chestnut. SEPARATIONS 2022. [DOI: 10.3390/separations9100296] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/06/2023] Open
Abstract
The chestnut postharvest pathogen Neofusicoccum parvum (N. parvum) is an important postharvest pathogen that causes chestnut rot. Chestnut rot in postharvest reduces food quality and causes huge economic losses. This study aimed to evaluate the inhibitory effect of dill seed essential oil (DSEO) on N. parvum and its mechanism of action. The chemical characterization of DSEO by gas chromatography/mass spectrometry (GC/MS) showed that the main components of DSEO were apiole, carvone, dihydrocarvone, and limonene. DSEO inhibited the growth of mycelium in a dose-dependent manner. The antifungal effects are associated with destroying the fungal cell wall (cytoskeleton) and cell membrane. In addition, DSEO can induce oxidative damage and intracellular redox imbalance to damage cell function. Transcriptomics analysis showed DSEO treatment induced differently expressed genes most related to replication, transcription, translation, and lipid, DNA metabolic process. Furthermore, in vivo experiments showed that DSEO and DSEO emulsion can inhibit the growth of fungi and prolong the storage period of chestnuts. These results suggest that DSEO can be used as a potential antifungal preservative in food storage.
Collapse
|
11
|
Contreras Martínez OI, Angulo Ortíz A, Santafé Patiño G. Mechanism of Antifungal Action of Monoterpene Isoespintanol against Clinical Isolates of Candida tropicalis. Molecules 2022; 27:molecules27185808. [PMID: 36144544 PMCID: PMC9505055 DOI: 10.3390/molecules27185808] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 08/30/2022] [Accepted: 09/02/2022] [Indexed: 11/24/2022] Open
Abstract
The growing increase in infections by Candida spp., non-albicans, coupled with expressed drug resistance and high mortality, especially in immunocompromised patients, have made candidemia a great challenge. The efficacy of compounds of plant origin with antifungal potential has recently been reported as an alternative to be used. Our objective was to evaluate the mechanism of the antifungal action of isoespintanol (ISO) against clinical isolates of Candida tropicalis. Microdilution assays revealed fungal growth inhibition, showing minimum inhibitory concentration (MIC) values between 326.6 and 500 µg/mL. The eradication of mature biofilms by ISO was between 20.3 and 25.8% after 1 h of exposure, being in all cases higher than the effect caused by amphotericin B (AFB), with values between 7.2 and 12.4%. Flow cytometry showed changes in the permeability of the plasma membrane, causing loss of intracellular material and osmotic balance; transmission electron microscopy (TEM) confirmed the damage to the integrity of the plasma membrane. Furthermore, ISO induced the production of intracellular reactive oxygen species (iROS). This indicates that the antifungal action of ISO is associated with damage to membrane integrity and the induction of iROS production, causing cell death.
Collapse
Affiliation(s)
| | - Alberto Angulo Ortíz
- Chemistry Department, Faculty of Basic Sciences, University of Córdoba, Montería 230002, Colombia
| | - Gilmar Santafé Patiño
- Chemistry Department, Faculty of Basic Sciences, University of Córdoba, Montería 230002, Colombia
| |
Collapse
|
12
|
Inhibitory Effects and Mechanism of Action of Elsinochrome A on Candida albicans and Its Biofilm. J Fungi (Basel) 2022; 8:jof8080841. [PMID: 36012829 PMCID: PMC9409654 DOI: 10.3390/jof8080841] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 08/09/2022] [Accepted: 08/10/2022] [Indexed: 11/24/2022] Open
Abstract
Biofilm-associated Candida albicans infections, the leading cause of invasive candidiasis, can cause high mortality rates in immunocompromised patients. Photodynamic antimicrobial chemotherapy (PACT) is a promising approach for controlling infections caused by biofilm-associated C. albicans. This study shows the effect of Elsinochrome A (EA) against different stages of C. albicans biofilms in vitro by XTT reduction assay and crystal violet staining. The mechanism of action of EA on C. albicans biofilm was analyzed with flow cytometry, confocal laser microscopy, and the Real-Time Quantitative Reverse Transcription PCR (qRT-PCR). EA-mediated PACT significantly reduced the viability of C. albicans, with an inhibition rate on biofilm of 89.38% under a concentration of 32 μg/mL EA. We found that EA could not only inhibit the adhesion of C. albicans in the early stage of biofilm formation, but that it also had good effects on pre-formed mature biofilms with a clearance rate of 35.16%. It was observed that EA-mediated PACT promotes the production of a large amount of reactive oxygen species (ROS) in C. albicans and down-regulates the intracellular expression of oxidative-stress-related genes, which further disrupted the permeability of cell membranes, leading to mitochondrial and nuclear damage. These results indicate that EA has good photodynamic antagonizing activity against the C. albicans biofilm, and potential clinical value.
Collapse
|
13
|
Identification of Novel Inhibitor of Enoyl-Acyl Carrier Protein Reductase (InhA) Enzyme in Mycobacterium tuberculosis from Plant-Derived Metabolites: An In Silico Study. Antibiotics (Basel) 2022; 11:antibiotics11081038. [PMID: 36009907 PMCID: PMC9405319 DOI: 10.3390/antibiotics11081038] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 07/23/2022] [Accepted: 07/26/2022] [Indexed: 12/03/2022] Open
Abstract
Mycobacterium tuberculosis (M.tb.) enoyl-acyl carrier protein (ACP) reductase (InhA) is validated as a useful target for tuberculosis therapy and is considered an attractive enzyme to drug discovery. This study aimed to identify the novel inhibitor of the InhA enzyme, a potential target of M.tb. involved in the type II fatty acid biosynthesis pathway that controls mycobacterial cell envelope synthesis. We compiled 80 active compounds from Ruta graveolens and citrus plants belonging to the Rutaceae family for pharmacokinetics and molecular docking analyses. The chemical structures of the 80 phytochemicals and the 3D structure of the target protein were retrieved from the PubChem database and RCSB Protein Data Bank, respectively. The evaluation of druglikeness was performed based on Lipinski’s Rule of Five, while the computed phytochemical properties and molecular descriptors were used to predict the ADMET of the compounds. Amongst these, 11 pharmacokinetically-screened compounds were further examined by performing molecular docking analysis with an InhA target using AutoDock 4.2. The docking results showed that gravacridonediol, a major glycosylated natural alkaloid from Ruta graveolens, might possess a promising inhibitory potential against InhA, with a binding energy (B.E.) of −10.80 kcal/mole and inhibition constant (Ki) of 600.24 nM. These contrast those of the known inhibitor triclosan, which has a B.E. of −6.69 kcal/mole and Ki of 12.43 µM. The binding efficiency of gravacridonediol was higher than that of the well-known inhibitor triclosan against the InhA target. The present study shows that the identified natural compound gravacridonediol possesses drug-like properties and also holds promise in inhibiting InhA, a key target enzyme of M.tb.
Collapse
|
14
|
Jin L, Liu S, Tan S, Wang Y, Zhao Y, Yu S. Petrositis caused by fluconazole-resistant candida: case report and literature review. BMC Infect Dis 2022; 22:649. [PMID: 35896968 PMCID: PMC9327414 DOI: 10.1186/s12879-022-07637-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2022] [Accepted: 07/20/2022] [Indexed: 11/19/2022] Open
Abstract
Background Petrositis is a rare and fatal complication associated with otitis media. It is most likely caused by bacterial infections, but in some cases it is caused by fungal infections. Case study The case in this report is associated with fungal petrositis. The clinical symptoms are: ear pain from chronic otitis media, severe headache, peripheral facial palsy and diplopia. The case was finally confirmed through imaging of middle ear, bacterial culture, pathology, and blood Metagenomic next-generation sequencing (mNGS) test. The patient was treated with sensitive antifungal drugs. Conclusion Drug treatment is conservative but efficient method in this case. mNGS can provide pathogenic reference, when antibiotic is not efficient enough for fungal infections or drug-resistant fungal infections cases. This allows we to adjust drug use for the treatment.
Collapse
Affiliation(s)
- Ling Jin
- Department of Otolaryngology, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Putuo, Shanghai, 200065, China
| | - Shuangxi Liu
- Department of Otolaryngology, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Putuo, Shanghai, 200065, China
| | - Shiwang Tan
- Department of Otolaryngology, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Putuo, Shanghai, 200065, China
| | - Yang Wang
- Department of Otolaryngology, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Putuo, Shanghai, 200065, China
| | - Yumin Zhao
- Department of Otolaryngology, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Putuo, Shanghai, 200065, China
| | - Shaoqing Yu
- Department of Otolaryngology, Tongji Hospital, School of Medicine, Tongji University, 389 Xincun Road, Putuo, Shanghai, 200065, China.
| |
Collapse
|
15
|
Mokhtar M, Youcefi F, Keddari S, Saimi Y, Elhao SO, Cacciola F. Phenolic content and in vitro antioxidant and anti-inflammatory evaluation of Algerian Ruta graveolens L. Chem Biodivers 2022; 19:e202200545. [PMID: 35866461 DOI: 10.1002/cbdv.202200545] [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: 06/06/2022] [Accepted: 07/22/2022] [Indexed: 11/05/2022]
Abstract
Plants constitute a valuable source of natural antioxidants such as polyphenols and are responsible for exhibiting many biologically significant functions. Ruta species including Ruta chalepensis L. and Ruta graveolens L are widespread species in Algeria and are used as medicinal plants to treat various diseases; however, so far, most of the conducted studies focused on analyzing alkaloids and essential oils mostly on R. chalepensis. The aim of the present research is to investigate the phenolic profile of the aerial parts of Ruta graveolens. L from Algeria and assess its in vitro antioxidant and anti-inflammatory properties. The total polyphenols and flavonoids were assessed using colorimetric methods, and the individual polyphenols were identified and quantified using HPLC-DAD-ESI-MS. The antioxidant activity was evaluated with DPPH and β-carotene tests, and the anti-inflammatory activity with inhibition of bovine serum albumin denaturation and HRBC membrane stabilization methods. The results showed that Ruta graveolens extract is rich in phenolic compounds with a total phenol and flavonoid contents of 41.63±0.394 mg GAE/gE and 13.97±0.33 mg EQ/gE, respectively. Nine phenolic compounds were determined, including three phenolic acids and six flavonoids. Rutin was the major phenolic compound in Ruta graveolens (464.95 µg/g), followed by syringic acid (179.74 µg/g), and naringenin (109.78 µg/g). R. graveolens phenolic extract also showed good antioxidant activity with values of 0.77 mM TE/g DW and 0.37 mM β-CE/ g DW with DPPH and β-carotene tests, respectively. For the anti-inflammatory activity, the highest tested concentration (200 μg/mL) gave 50.61% of inhibition of the denaturation of albumin and 44.12% of membrane stabilization.
Collapse
Affiliation(s)
- Meriem Mokhtar
- Université Abdelhamid Ibn Badis de Mostaganem: Universite Abdelhamid Ibn Badis de Mostaganem, Institute of Medical and Biological Sciences, -, Mostaganem, ALGERIA
| | - Fatma Youcefi
- Abou Bekr Belkaid University Tlemcen: Universite Abou Bekr Belkaid Tlemcen, Institute of Medical and Biological Sciences, -, Tlemcen, ALGERIA
| | - Soumia Keddari
- Universite Abdelhamid Ibn Badis de Mostaganem, Institute of Medical and Biological Sciences, -, Mostaganem, ALGERIA
| | - Yahia Saimi
- Universite Abdelhamid Ibn Badis de Mostaganem, -, -, Mostaganem, ALGERIA
| | - Siham Otsmane Elhao
- Université Abdelhamid Ibn Badis de Mostaganem: Universite Abdelhamid Ibn Badis de Mostaganem, -, -, Mostaganem, ALGERIA
| | - Francesco Cacciola
- University of Messina: Universita degli Studi di Messina, BIOMORF, Via Consolare Valeria, 98125, Messina, ITALY
| |
Collapse
|
16
|
Valková V, Ďúranová H, Vukovic NL, Vukic M, Kluz M, Kačániová M. Assessment of Chemical Composition and Anti-Penicillium Activity of Vapours of Essential Oils from Abies Alba and Two Melaleuca Species in Food Model Systems. Molecules 2022; 27:molecules27103101. [PMID: 35630578 PMCID: PMC9145176 DOI: 10.3390/molecules27103101] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2022] [Revised: 05/07/2022] [Accepted: 05/10/2022] [Indexed: 02/04/2023] Open
Abstract
The possibilities of the practical utilization of essential oils (EOs) from various plant species in the food industry have attracted the attention of the scientific community. Following our previous studies, the antifungal activities of three further commercial EOs, Melaleuca armillaris subsp. armillaris (rosalina; REO), Melaleuca quinquenervia (niaouli; NEO), and Abies alba (fir; FEO), were evaluated in the present research in respect to their chemical profiles, over four different concentrations, 62.5 μL/L, 125 μL/L, 250 μL/L, and 500 μL/L. The findings revealed that the major compounds of REO, NEO, and FEO were linalool (47.5%), 1,8-cineole (40.8%), and α-pinene (25.2%), respectively. In vitro antifungal determinations showed that the inhibition zones of a Penicillium spp. mycelial growth ranged from no inhibitory effectiveness (00.00 ± 00.00 mm) to 16.00 ± 1.00 mm, indicating a very strong antifungal activity which was detected against P. citrinum after the highest REO concentration exposure. Furthermore, the in situ antifungal efficacy of all EOs investigated was shown to be dose-dependent. In this sense, we have found that the highest concentration (500 µL/L) of REO, NEO, and FEO significantly reduced (p < 0.05) the growth of all Penicillium strains inoculated on the bread, carrot, and potato models. These results indicate that the investigated EOs may be promising innovative agents in order to extend the shelf life of different types of food products, such as bread, carrot and potato.
Collapse
Affiliation(s)
- Veronika Valková
- Institute of Horticulture, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia;
| | - Hana Ďúranová
- AgroBioTech Research Centre, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia;
| | - Nenad L. Vukovic
- Department of Chemistry, Faculty of Science, University of Kragujevac, 34000 Kragujevac, Serbia; (N.L.V.); (M.V.)
| | - Milena Vukic
- Department of Chemistry, Faculty of Science, University of Kragujevac, 34000 Kragujevac, Serbia; (N.L.V.); (M.V.)
| | - Maciej Kluz
- Department of Bioenergy, Food Technology and Microbiology, Institute of Food Technology and Nutrition, University of Rzeszow, 4 Zelwerowicza Str., 35-601 Rzeszow, Poland;
| | - Miroslava Kačániová
- Institute of Horticulture, Faculty of Horticulture and Landscape Engineering, Slovak University of Agriculture, Tr. A. Hlinku 2, 94976 Nitra, Slovakia;
- Department of Bioenergy, Food Technology and Microbiology, Institute of Food Technology and Nutrition, University of Rzeszow, 4 Zelwerowicza Str., 35-601 Rzeszow, Poland;
- Correspondence:
| |
Collapse
|
17
|
Gao Y, Zhang Z, Lun Z, Gong L, Xu A, Li X. Synergistic Effects of Fluconazole Combined with Doxycycline Against Dual-Species Cultures of Candida albicans and Staphylococcus epidermidis and the Mechanisms of Action. Microb Drug Resist 2022; 28:525-535. [PMID: 35363560 DOI: 10.1089/mdr.2021.0301] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Bacterial and fungal coinfections have posed great clinical challenges in recent years, and combination therapy may be a useful way to treat these mixed infections. The objective of this study was to find an effective drug combination to treat dual-species cultures of fungi and bacteria. In this study, we focused on poorly investigated mixed cultures of Candida albicans and Staphylococcus epidermidis. In this research, we investigated the effects of fluconazole (FLC) and doxycycline (DOX) against dual-species cultures of C. albicans and S. epidermidis. Both the fractional inhibitory concentration index model and ΔE model revealed a synergistic antimicrobial effect between FLC and DOX against the four groups of dual-species cultures. Mechanistic studies revealed that the synergism of FLC and DOX against dual-species cultures may be associated with the inhibition of biofilms and calcium dysregulation. Fluconazole+doxycycline appears to be a potential drug combination for the treatment of bacterial and fungal coinfections. These findings are of great significance for overcoming clinical bacterial and fungal coinfections and might provide novel insights into drug discovery for combination therapy.
Collapse
Affiliation(s)
- Yuan Gao
- Department of Pharmacy, The First Affiliated Hospital of Soochow University, Suzhou, China
| | - Zihe Zhang
- Otorhinolaryngologic Department, Shandong Provincial Maternal and Child Health Care Hospital, Jinan, China
| | - Zhicai Lun
- Pharmacy Department, Juxian Hospital of Traditional Chinese Medicine, Rizhao, China
| | - Liping Gong
- Obstetrics and Gynecology Department, Yicheng Street Community Health Service Center, Linyi, China
| | - Anran Xu
- Center for Reproductive Medicine, Shandong Provincial Maternal and Child Health Care Hospital, Jinan, China
| | - Xiuyun Li
- Key Laboratory of Birth Regulation and Control Technology of National Health Commission of China, Shandong Provincial Maternal and Child Health Care Hospital, Jinan, China
| |
Collapse
|
18
|
Wolde B, Abay SM, Nigussie D, Legesse B, Makonnen E, Mengie Ayele T. Evaluation of Wound Healing and Antibacterial Activities of Solvent Fractions of 80% Methanol Leaf Extract of Brucea antidysenterica J.F. Mill (Simaroubaceae). Infect Drug Resist 2022; 15:1517-1531. [PMID: 35411156 PMCID: PMC8994597 DOI: 10.2147/idr.s360761] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2022] [Accepted: 03/26/2022] [Indexed: 11/23/2022] Open
Abstract
Background Brucea antidysenterica is a well-known medicinal plant that has traditionally been used to treat a variety of ailments, including wound healing. Supporting the traditional claims, wound healing, antibacterial, anti-inflammatory, and antioxidant activities of the crude extracts of different parts of the plant were reported. The aim of this study was to evaluate the wound healing and antibacterial activities of solvent fractions of the menthol leaf extract of Brucea antidysenterica. Methods Methanol (80%) leaf extract of Brucea antidysenterica was fractionated using three solvents; water, n-butanol and chloroform. An ointment containing 2% and 4% of each fraction was formulated and applied to wounds inflicted on rats topically. The wound contraction rate, period of epithelialization, and breaking strength were analysed. In vitro antibacterial activities were tested using the agar diffusion method. The macro-tube dilution technique was used to determine the minimum inhibitory concentration (MIC), and the minimum bactericidal concentration (MBC) was determined by sub-culturing the MIC and concentrations below the MIC. Results The 2% and 4% aqueous fractions (AF) significantly increased wound contraction (p 0.001) compared to the negative control and increased tensile strength compared to untreated (p 0.001). Among the three fractions, the n-butanol fraction showed the highest antibacterial growth inhibition, ranging from 8 mm (E. coli) to 16 mm (S. aureus). Conclusion Data obtained from this study collectively indicated that the aqueous fraction of 80% methanol leaf extract of B. antidysenterica possesses wound healing and antibacterial activities.
Collapse
Affiliation(s)
- Befekadu Wolde
- Department of Pharmacy, Addis Ababa Health Bureau, Addis Ababa, Ethiopia
| | - Solomon Mequanente Abay
- Department of Pharmacology and Clinical Pharmacy, School of Pharmacy, College of Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Dereje Nigussie
- Vaccines and Diagnostic Research Directorate, Ethiopian Public Health Institute, Addis Ababa, Ethiopia
| | - Belete Legesse
- Center for Innovative Drug Development and Therapeutics Trial in Africa (CDT-Africa), College of Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Eyasu Makonnen
- Department of Pharmacology and Clinical Pharmacy, School of Pharmacy, College of Health Science, Addis Ababa University, Addis Ababa, Ethiopia
- Center for Innovative Drug Development and Therapeutics Trial in Africa (CDT-Africa), College of Health Science, Addis Ababa University, Addis Ababa, Ethiopia
| | - Teklie Mengie Ayele
- Department of Pharmacy, College of Health Science, Debre Tabor University, Debre Tabor, Ethiopia
- Correspondence: Teklie Mengie Ayele, Department of Pharmacy, College of Health Science, Debre Tabor University, P.O. Box: 272, Debre Tabor, 6300, Ethiopia, Tel +251 910111531, Email
| |
Collapse
|
19
|
Spengler G, Gajdács M, Donadu MG, Usai M, Marchetti M, Ferrari M, Mazzarello V, Zanetti S, Nagy F, Kovács R. Evaluation of the Antimicrobial and Antivirulent Potential of Essential Oils Isolated from Juniperus oxycedrus L. ssp. macrocarpa Aerial Parts. Microorganisms 2022; 10:microorganisms10040758. [PMID: 35456809 PMCID: PMC9032431 DOI: 10.3390/microorganisms10040758] [Citation(s) in RCA: 24] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2022] [Revised: 03/17/2022] [Accepted: 03/28/2022] [Indexed: 01/01/2023] Open
Abstract
As a consequence of the worsening situation with multidrug-resistant (MDR) pathogens and a disparity in the commercialization of novel antimicrobial agents, scientists have been prompted to seek out new compounds with antimicrobial activity from a wide range of sources, including medicinal plants. In the present study, the antibacterial, antifungal, anti-virulence, and resistance-modulating properties of the essential oil from the Sardinian endemic Juniperus oxycedrus L. ssp. macrocarpa aerial parts were evaluated. The GC/MS analysis showed that the main compounds in the oil were α-pinene (56.63 ± 0.24%), limonene (14.66 ± 0.11%), and β-pinene (13.42 ± 0.09%). The essential oil showed potent antibacterial activity against Gram-positive bacteria (0.25–2 v/v%) and Salmonella spp. (4 v/v%). The strongest fungicidal activity was recorded against Candida auris sessile cells (median FICI was 0.088) but not against C. albicans biofilms (median FICI was 1). The oil showed potent efflux pump inhibitory properties in the case of Staphylococcus aureus and Escherichia coli. The therapeutic potential of Juniperus may be promising for future more extensive research and in vivo tests to develop new drugs against antibiotic and antifungal resistance.
Collapse
Affiliation(s)
- Gabriella Spengler
- Department of Medical Microbiology, Albert Szent-Györgyi Health Center and Albert Szent-Györgyi Medical School, University of Szeged, Semmelweis Utca 6, 6725 Szeged, Hungary;
| | - Márió Gajdács
- Department of Oral Biology and Experimental Dental Research, Faculty of Dentistry, University of Szeged, Tisza Lajos krt. 63, 6720 Szeged, Hungary;
| | - Matthew Gavino Donadu
- Hospital Pharmacy, Azienda Ospedaliero Universitaria di Sassari, 07100 Sassari, Italy
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (M.F.); (V.M.); (S.Z.)
- Correspondence:
| | - Marianna Usai
- Department of Chemistry and Pharmacy, University of Sassari, 07100 Sassari, Italy;
| | - Mauro Marchetti
- Institute of Biomolecular Chemistry (CNR), Li Punti, 07100 Sassari, Italy;
| | - Marco Ferrari
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (M.F.); (V.M.); (S.Z.)
| | - Vittorio Mazzarello
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (M.F.); (V.M.); (S.Z.)
| | - Stefania Zanetti
- Department of Biomedical Sciences, University of Sassari, 07100 Sassari, Italy; (M.F.); (V.M.); (S.Z.)
| | - Fruzsina Nagy
- Department of Medical Microbiology, Faculty of Medicine and Pharmacy, University of Debrecen, Nagyerdei krt. 98, 4032 Debrecen, Hungary; (F.N.); (R.K.)
- Doctoral School of Pharmaceutical Sciences, University of Debrecen, 4032 Debrecen, Hungary
| | - Renátó Kovács
- Department of Medical Microbiology, Faculty of Medicine and Pharmacy, University of Debrecen, Nagyerdei krt. 98, 4032 Debrecen, Hungary; (F.N.); (R.K.)
| |
Collapse
|
20
|
Antimicrobial activity of Bacillus sp. isolated strains of wild honey. BMC Complement Med Ther 2022; 22:78. [PMID: 35305633 PMCID: PMC8933914 DOI: 10.1186/s12906-022-03551-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2021] [Accepted: 03/07/2022] [Indexed: 12/18/2022] Open
Abstract
Background Multi-drug resistant bacteria hazards to the health of humans could be an agent in the destruction of human generation. Natural products of Bacillus species are the main source to access progressive antibiotics that can be a good candidate for the discovery of novel antibiotics. Wild honey as a valuable food has been used in medicine with antimicrobial effects. Objective Bacillus strains isolated from wild honey were evaluated for the potential antimicrobial activity against human and plant bacterial and fungal pathogens. Methods Three bacterial isolates were identified as strain Khuz-1 (98.27% similarity with Bacillus safensis subsp. Safensis strain FO-36bT), strain Khuz-2 (99.18% similarity with Bacillus rugosus strain SPB7T), and strain Khuz-3 (99.78% similarity with Bacillus velezensis strain CR-502 T) by 16S rRNA gene sequences. The strains were characterized by their ability to inhibit the growth of human and phytopathogenic fungi. Results The results indicated that B. rugosus strain Khuz-2 inhibited the growth of phytopathogenic and human fungal more effective than other ones. It seems that the strain Khuz-2 has a suitable antimicrobial and antifungal potential as a good candidate for further pharmaceutical research. Conclusion Based on the results of GC–MS, Pyrrolo [1,2-a] pyrazine-1,4-dion, hexahydro-3-(2-methylpropyle) (PPDHM) was the major compound for all strains which have a various pharmacological effect. Isolation and identification of beneficial bacteria from natural sources can play an important role in future pharmaceutical and industrial applications. Supplementary Information The online version contains supplementary material available at 10.1186/s12906-022-03551-y.
Collapse
|
21
|
Kis B, Pavel IZ, Avram S, Moaca EA, Herrero San Juan M, Schwiebs A, Radeke HH, Muntean D, Diaconeasa Z, Minda D, Oprean C, Bojin F, Dehelean CA, Soica C, Danciu C. Antimicrobial activity, in vitro anticancer effect (MCF-7 breast cancer cell line), antiangiogenic and immunomodulatory potentials of Populus nigra L. buds extract. BMC Complement Med Ther 2022; 22:74. [PMID: 35296309 PMCID: PMC8928639 DOI: 10.1186/s12906-022-03526-z] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2021] [Accepted: 02/02/2022] [Indexed: 11/10/2022] Open
Abstract
PURPOSE The aim of this study was to evaluate the antioxidant potential, antimicrobial activity, the in vitro anticancer effect (tested on MCF-7 breast cancer cell line), as well as the antiangiogenic and immunomodulatory potential of Populus nigra L. bud (Pg) extract collected from the western part of Romania. RESULTS Populus nigra L. bud extract presents an important antioxidant activity, due to the rich phytochemical composition. Regarding the biological activity, results have shown that poplar bud extract presents a significant inhibitory activity against Gram-positive bacteria and a dose-dependent decrease of MCF-7 tumor cell viability with an IC50 of 66.26 μg/mL, while not affecting healthy cells. Phenomena of early apoptotic events at the maximum concentration tested (150 μg/mL) were detected by Annexin V-PI double staining. The extract induced G0/G1 phase cell cycle arrest. In addition, Pg extract showed antiangiogenic potential on the chorioallantoic membrane. Also, at the highest concentration (150 μg/mL), good tolerability and no signs of toxicity upon vascular plexus were observed. Moreover, in low concentrations, the Pg extract had immunomodulatory activity on primary human dendritic cells by upregulating IL-12 and IL-23 subunits. CONCLUSION The study concludes that poplar bud extract elicited antioxidant activity, antitumor properties on the breast cancer cell line, followed by an antiangiogenic effect and an immunomodulatory potential on human primary dendritic cells. The biological activity of Populus nigra L. buds extract may open new directions of research on the topic addressed.
Collapse
Affiliation(s)
- Brigitta Kis
- Department of Pharmacognosy, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Ioana Zinuca Pavel
- Department of Pharmacognosy, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania. .,Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.
| | - Stefana Avram
- Department of Pharmacognosy, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Elena Alina Moaca
- Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,Department of Toxicology, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Martina Herrero San Juan
- Pharmazentrum frankfurt/ZAFES, Institute of General Pharmacology and Toxicology, Hospital of the Goethe University, 60590, Frankfurt/Main, Germany
| | - Anja Schwiebs
- Pharmazentrum frankfurt/ZAFES, Institute of General Pharmacology and Toxicology, Hospital of the Goethe University, 60590, Frankfurt/Main, Germany
| | - Heinfried H Radeke
- Pharmazentrum frankfurt/ZAFES, Institute of General Pharmacology and Toxicology, Hospital of the Goethe University, 60590, Frankfurt/Main, Germany
| | - Delia Muntean
- Department of Microbiology, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.
| | - Zorita Diaconeasa
- Department of Food Science and Technology, Faculty of Food Science and Technology, University of Agricultural Science and Veterinary Medicine, Calea Manastur, 3-5, 400372, Cluj-Napoca, Romania
| | - Daliana Minda
- Department of Pharmacognosy, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Camelia Oprean
- Department of Pharmacy I, Drug Analysis, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,"Pius Brinzeu" Timişoara County Emergency Clinical Hospital, Oncogen Institute, 156 Liviu Rebreanu, 300723, Timişoara, Romania.,Advanced Instrumental Screening Center, Faculty of Pharmacy, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Florina Bojin
- "Pius Brinzeu" Timişoara County Emergency Clinical Hospital, Oncogen Institute, 156 Liviu Rebreanu, 300723, Timişoara, Romania.,Department of Functional Sciences, Faculty of Medicine, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Cristina Adriana Dehelean
- Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,Department of Toxicology, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Codruta Soica
- Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,Department of Pharmaceutical Chemistry, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| | - Corina Danciu
- Department of Pharmacognosy, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania.,Research Center for Pharmaco-Toxicological Evaluation, "Victor Babeș" University of Medicine and Pharmacy Timișoara, Romania, Eftimie Murgu Sq. no. 2, 300041, Timișoara, Romania
| |
Collapse
|
22
|
Al-Otibi FO, Alrumaizan GI, Alharbi RI. Evaluation of anticandidal activities and phytochemical examination of extracts prepared from Vitex agnus-castus: a possible alternative in treating candidiasis infections. BMC Complement Med Ther 2022; 22:69. [PMID: 35292012 PMCID: PMC8925216 DOI: 10.1186/s12906-022-03552-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2021] [Accepted: 02/28/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Candidiasis infection is associated with high morbidity and mortality. Fungicidal resistance of some commercially used fungicides ascended the need for a naturally effective alternative. The current study aimed to evaluate the fungicidal activity of Vitex agnus-castus extracts in vitro against some Candida species. METHODS The bioactive compounds contained in the crude and alcoholic extracts were compared, and the antioxidant activity was tested, as well. The phytochemical analysis was carried out by Fourier Transform-Infrared Spectroscopy (FTIR) and Gas Chromatography-Mass Spectrometry (GC/MS). The scavenger activity of the tested extracts was tested, as well. The anticandidal activity was tested to detect the effect of the tested extracts on the mycelial growth of Candida albicans, Candida krusei, Candida parapsilosis, Candia tropicalis, Candida famata, Candida rhodotorula, and Candida dublinesis. The minimum inhibitory concentrations were calculated for all reported activities. The Scanning Electron Microscopy (SEM) and the Transmission Electron Microscopy (TEM) were used to detect the morphological and ultrastructure response in some selected species. RESULTS FTIR and GC/MS revealed the existence of different bioactive chemical groups such as polyphenols, fatty acids, terpenes, terpenoids, steroids, aldehydes, alcohols, and esters, phytol which is a diterpene. DPPH results confirmed the antioxidant activity of all extracts where the methanolic extract was the strongest scavenging substrate. All extracts showed strong inhibitory effects against different species at a concentration of 200 µg/ml (P < 0.001). SEM and TEM showed morphological and ultrastructure changes in C. famata. CONCLUSION The current study suggested a reliable antifungal activity of different extracts of Vitex agnus-castus against different Candida species and strains. However, further studies are required to confirm the safety of these extracts to be used in medical applications.
Collapse
Affiliation(s)
- Fatima O Al-Otibi
- Botany and Microbiology Department, College of Science, King Saud University, P. O Box 22452, Riyadh, 11495, Saudi Arabia.
| | - Ghaida I Alrumaizan
- Botany and Microbiology Department, College of Science, King Saud University, P. O Box 22452, Riyadh, 11495, Saudi Arabia
| | - Raedah I Alharbi
- Botany and Microbiology Department, College of Science, King Saud University, P. O Box 22452, Riyadh, 11495, Saudi Arabia
| |
Collapse
|
23
|
Ayalew Tiruneh T, Ayalew Tiruneh G, Chekol Abebe E, Mengie Ayele T. Phytochemical Investigation and Determination of Antibacterial Activity of Solvent Leave Extracts of Carissa spinarum. Infect Drug Resist 2022; 15:807-819. [PMID: 35281572 PMCID: PMC8904435 DOI: 10.2147/idr.s352049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Accepted: 02/15/2022] [Indexed: 11/23/2022] Open
Abstract
Background Among many traditionally used medicinal plants, Carissa spinarum (Agam) is a well-known indigenous plant in Ethiopia. It is used in its raw form to treat different diseases in different parts of the country. Therefore, the aim of this study is to investigate extraction, isolation, and determination of the antibacterial properties of the solvent leaf extract of Carissa spinarum. Methods In this study, 800 g of powdered leaves of Carissa spinarum were macerated with 2500 mL of methanol and yielded 58 g (7.25%, w/w) of gummy material. The extract was then further partitioned by using ethyl acetate and chloroform. The extracts were subjected to phytochemical screening test. The antibacterial activity of the three solvent leaf extracts of Carissa spinarum were evaluated using disc diffusion method. The methanol extract was subjected to column chromatography silica gel (60-200 mesh) by mixing methanol:petroleum ether (4:1). Then fractions were collected and investigated by TLC and finally identified using spectroscopy. Results The three extracts (methanol, ethyl acetate, and chloroform) of Carissa spinarum were presented to antimicrobial activity by disc diffusion method against four bacterial species using gentamycin and ampicillin discs as positive controls and DMSO as a negative control. All extracts had a relatively antibacterial effect with different extent zones of inhibition. However, the methanol extract showed superior antibacterial activity compared with DMSO and ethyl acetate and chloroform extracts. These could due to variation of the phytoconstituents. The most probable structure of the compound isolated was 5-(2',3',4',6'-tetrahydroxy-5'-methoxycyclohexyloxy)-2,3,4 trihydroxypentanoic acid. Conclusion Data obtained from this study collectively indicated that the three solvent extracts of Carissa spinarum have a promising antimicrobial activity which supports the traditional claim of the plant for treatment of infection.
Collapse
Affiliation(s)
- Tizezew Ayalew Tiruneh
- Department of Chemistry, College of Natural and Computational Science, University of Gondar, Gondar, Ethiopia
| | | | - Endeshaw Chekol Abebe
- Department of Medical Biochemistry, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| | - Teklie Mengie Ayele
- Department of Pharmacy, College of Health Sciences, Debre Tabor University, Debre Tabor, Ethiopia
| |
Collapse
|
24
|
Special Issue: Alternative Therapeutic Approaches of Candida Infections. J Fungi (Basel) 2022; 8:jof8020170. [PMID: 35205924 PMCID: PMC8880669 DOI: 10.3390/jof8020170] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Accepted: 02/08/2022] [Indexed: 01/26/2023] Open
Abstract
In recent decades, the prevalence of resistant fungal isolates has been steadily increasing both in veterinary and human medicine as well as in agriculture [...]
Collapse
|
25
|
A single exposure to a sublethal concentration of Origanum vulgare essential oil initiates response against food stressors and restoration of antibiotic susceptibility in Listeria monocytogenes. Food Control 2022. [DOI: 10.1016/j.foodcont.2021.108562] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
|
26
|
Xia J, Wang Z, Li T, Lu F, Sheng D, Huang W. Immunosuppressed Patients with Clinically Diagnosed Invasive Fungal Infections: The Fungal Species Distribution, Antifungal Sensitivity and Associated Risk Factors in a Tertiary Hospital of Anhui Province. Infect Drug Resist 2022; 15:321-333. [PMID: 35140478 PMCID: PMC8818762 DOI: 10.2147/idr.s351260] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Accepted: 01/14/2022] [Indexed: 12/13/2022] Open
Abstract
Objective Since the nosocomial fungal infections increasingly emerge, we extensively investigated the fungal species stratification and antifungal sensitivity profiles, clinical characteristics and associated risk factors of immunosuppressed patients with clinically diagnosed invasive fungal infections (IFIs) in a tertiary hospital of Anhui province. Methods In total, 112 subjects with immunosuppressive state were enrolled from a comprehensive tertiary hospital in Central China between July 2019 and December 2021. Eight-one fungal isolates were clinically recovered by fungus-culturing approaches. The identifications were conducted through a mass spectrometry detecting platform. The susceptibilities to antifungals were tested using the broth micro-dilution method, and the possible antifungal azole-resistance mechanism in specific Candida species was availably explored by sequencing. Patient medical profiles were accessed via the digitized retrieval system of hospital, from which clinical outcomes and multiple risk factors for immunosuppressed patients with clinically diagnosed IFIs were explicitly documented for evaluation. Results Candida species predominated in clinically diagnosed IFIs of immunosuppressed patients (accounting for 88.88%), followed by Trichosporon and Aspergillus species (6.17% and 4.94%, respectively). The source types of specimen were primarily comprised of urine (41.98%), respiratory samples (33.33%) and peripheral blood (9.88%). Frequently isolated Candida and Trichosporon species exhibited a high level of in vitro sensitivity for amphotericin B and 5-fluorocytosine, whereas a substantial portion of Candida species including C. glabrata, C. parapsilosis complex and C. tropicalis, and Trichosporon species showed lowered sensitivity patterns toward itraconazole, fluconazole and voriconazole at different levels. Specifically, gene mutations of ERG11 were identified in azole-resistant C. tropicalis. Distinct risk factors were analyzed to be highly associated with the clinically diagnosed IFI incidence, mainly including hospitalization duration, surgical procedures, immunosuppressive treatments, underlying diseases and other conditions. Conclusion Candida, Trichosporon and Aspergillus species were the top three pathogenic fungal agents causing clinically diagnosed IFIs in immunosuppressed patients. The attenuated sensitivity to azoles in Candida and Trichosporon species needs close surveillance, and ERG11 polymorphism might contribute to azole resistance in specific Candida species. Multiple featured risk factors for immunosuppressed patients developing clinically diagnosed IFIs require further consideration during clinical practice.
Collapse
Affiliation(s)
- Jinxing Xia
- Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People’s Republic of China
- Correspondence: Jinxing Xia, Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, People’s Republic of China, Email ; Wei Huang, Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, People’s Republic of China, Email
| | - Zhongxin Wang
- Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People’s Republic of China
| | - Tingting Li
- Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People’s Republic of China
| | - Fanbo Lu
- Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People’s Republic of China
| | - Daping Sheng
- Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People’s Republic of China
| | - Wei Huang
- Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, 230022, Anhui, People’s Republic of China
- Correspondence: Jinxing Xia, Department of Clinical Laboratory, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, People’s Republic of China, Email ; Wei Huang, Department of Oncology, the First Affiliated Hospital of Anhui Medical University, Hefei, Anhui, 230022, People’s Republic of China, Email
| |
Collapse
|
27
|
Kovács R, Majoros L. Antifungal lock therapy: an eternal promise or an effective alternative therapeutic approach? Lett Appl Microbiol 2022; 74:851-862. [PMID: 35032330 PMCID: PMC9306927 DOI: 10.1111/lam.13653] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 01/02/2022] [Accepted: 01/07/2022] [Indexed: 11/30/2022]
Abstract
Each year, millions of central venous catheter insertions are performed in intensive care units worldwide. The usage of these indwelling devices is associated with a high risk of bacterial and fungal colonization, leading to the development of microbial consortia, namely biofilms. These sessile structures provide fungal cells with resistance to the majority of antifungals, environmental stress and host immune responses. Based on different guidelines, colonized/infected catheters should be removed and changed immediately in the case of Candida‐related central line infections. However, catheter replacement is not feasible for all patient populations. An alternative therapeutic approach may be antifungal lock therapy, which has received high interest, especially in the last decade. This review summarizes the published Candida‐related in vitro, in vivo data and case studies in terms of antifungal lock therapy. The number of clinical studies remains limited and further studies are needed for safe implementation of the antifungal lock therapy into clinical practice.
Collapse
Affiliation(s)
- Renátó Kovács
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, Hungary.,Faculty of Pharmacy, University of Debrecen, Hungary
| | - László Majoros
- Department of Medical Microbiology, Faculty of Medicine, University of Debrecen, Hungary
| |
Collapse
|
28
|
Dabas Y, Xess I, Pandey M, Ahmed J, Sachdev J, Iram A, Singh G, Mahapatra M, Seth R, Bakhshi S, Kumar R, Jyotsna VP, Mathur S. Epidemiology and Antifungal Susceptibility Patterns of Invasive Fungal Infections (IFIs) in India: A Prospective Observational Study. J Fungi (Basel) 2021; 8:jof8010033. [PMID: 35049974 PMCID: PMC8777790 DOI: 10.3390/jof8010033] [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: 10/30/2021] [Revised: 12/07/2021] [Accepted: 12/27/2021] [Indexed: 12/21/2022] Open
Abstract
The epidemiology of invasive fungal infections (IFI) is ever evolving. The aim of the present study was to analyze the clinical, microbiological, susceptibility, and outcome data of IFI in Indian patients to identify determinants of infection and 30-day mortality. Proven and probable/putative IFI (defined according to modified European Organization for Research and Treatment of Cancer/Mycoses Study Group and AspICU criteria) from April 2017 to December 2018 were evaluated in a prospective observational study. All recruited patients were antifungal naïve (n = 3300). There were 253 episodes of IFI (7.6%) with 134 (52.9%) proven and 119 (47%) probable/putative infections. There were four major clusters of infection: invasive candidiasis (IC) (n = 53, 20.9%), cryptococcosis (n = 34, 13.4%), invasive aspergillosis (IA) (n = 103, 40.7%), and mucormycosis (n = 62, 24.5%). The significant risk factors were high particulate efficiency air (HEPA) room admission, ICU admission, prolonged exposure to corticosteroids, diabetes mellitus, chronic liver disease (CLD), acquired immunodeficiency syndrome (AIDS), coronary arterial disease (CAD), trauma, and multiorgan involvement (p < 0.5; odds ratio: >1). The all-cause 30-day mortality was 43.4% (n = 110). It varied by fungal group: 52.8% (28/53) in IC, 58.8% (20/34) in cryptococcosis, 39.8% (41/103) in IA, and 33.9% (21/62) in mucormycosis. HEPA room, ICU admission for IC; HEPA rooms, diabetes mellitus for cryptococcosis; hematological malignancies, chronic kidney disease (CKD), sepsis, galactomannan antigen index value ≥1 for IA and nodules; and ground glass opacities on radiology for mucormycosis were significant predictors of death (odds ratio >1). High minimum inhibitory concentration (MIC) values for azoles were observed in C. albicans, C. parapsilosis, C. glabrata, A. fumigatus, A. flavus, R. arrhizus, R. microsporus, and M. circinelloides. For echinocandin, high MIC values were seen in C. tropicalis, C. guillermondii, C. glabrata, and A. fumigatus. This study highlights the shift in epidemiology and also raises concern of high MICs to azoles among our isolates. It warrants regular surveillance, which can provide the local clinically correlated microbiological data to clinicians and which might aid in guiding patient treatment.
Collapse
Affiliation(s)
- Yubhisha Dabas
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
| | - Immaculata Xess
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
- Correspondence: ; Tel.: +91-98-1826-8181; Fax: +91-11-2659-3208
| | - Mragnayani Pandey
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
| | - Jaweed Ahmed
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
| | - Janya Sachdev
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
| | - Azka Iram
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
| | - Gagandeep Singh
- Department of Microbiology, All India Institute of Medical Sciences, New Delhi 110029, India; (Y.D.); (M.P.); (J.A.); (J.S.); (A.I.); (G.S.)
| | - Manoranjan Mahapatra
- Department of Hematology, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Rachna Seth
- Department of Paediatrics, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Sameer Bakhshi
- Department of Medical Oncology, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Rakesh Kumar
- Department of Otorhinolaryngology, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Viveka P. Jyotsna
- Department of Endocrinology, All India Institute of Medical Sciences, New Delhi 110029, India;
| | - Sandeep Mathur
- Department of Pathology, All India Institute of Medical Sciences, New Delhi 110029, India;
| |
Collapse
|
29
|
Zhou F, Dai O, Peng C, Xiong L, Ao H, Liu F, Zhou QM. Pro-Angiogenic Effects of Essential Oil from Perilla frutescens and Its Main Component (Perillaldehyde) on Zebrafish Embryos and Human Umbilical Vein Endothelial Cells. Drug Des Devel Ther 2021; 15:4985-4999. [PMID: 34924753 PMCID: PMC8674578 DOI: 10.2147/dddt.s336826] [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] [Accepted: 12/03/2021] [Indexed: 12/14/2022] Open
Abstract
Purpose Perilla frutescens (L.) Britt., a traditional edible-medicinal herb in China, has been used to treat cardiovascular and cerebrovascular (cardio-cerebrovascular) diseases for thousands of years. However, knowledge of the mechanisms underlying the effects of essential oil from P. frutescens (EOPF) in the treatment of cardio-cerebrovascular diseases is lacking. The promotion of angiogenesis is beneficial in the treatment of ischemic cardio-cerebrovascular diseases. The current study investigated the pro-angiogenic role of EOPF and its main component perillaldehyde in sunitinib-injured transgenic Tg (flk1:EGFP) zebrafish embryos and human umbilical vein endothelial cells (HUVECs) for the first time. Materials and Methods The pro-angiogenic effects of EOPF and perillaldehyde were observed in vivo using transgenic Tg (flk1:EGFP) zebrafish embryos and in vitro using HUVECs. Cell viability, proliferation, migration, tube formation, and protein levels were detected by MTT, EdU staining, wound healing, transwell chamber, and Western blot assays, respectively. Results EOPF and perillaldehyde exerted a significant stimulatory effect on the formation of zebrafish intersegmental vessels (ISVs). Moreover, EOPF and perillaldehyde promoted proliferation, migration, and tube formation in sunitinib-treated HUVECs. Additionally, our findings uncovered that the pro-angiogenic effects of EOPF and perillaldehyde were mediated by increases in the expression ratios of p-ERK1/2 to ERK1/2 and Bcl-2 to Bax. Conclusion The present study is the first report to provide clear evidence that EOPF and perillaldehyde promote angiogenesis by stimulating repair of sunitinib-injured ISVs in zebrafish embryos and promoting proliferation, migration, and tube formation in sunitinib-injured HUVECs. The underlying mechanisms are related to increased p-ERK1/2 to ERK1/2 and Bcl-2 to Bax expression ratios. EOPF and perillaldehyde may be used in the treatment of cardio-cerebrovascular diseases, which is consistent with the traditional application of P. frutescens.
Collapse
Affiliation(s)
- Fei Zhou
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| | - Ou Dai
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| | - Cheng Peng
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| | - Liang Xiong
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| | - Hui Ao
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| | - Fei Liu
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,School of Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| | - Qin-Mei Zhou
- State Key Laboratory of Southwestern Chinese Medicine Resources, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,Institute of Innovative Medicine Ingredients of Southwest Specialty Medicinal Materials, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China.,Innovative Institute of Chinese Medicine and Pharmacy, Chengdu University of Traditional Chinese Medicine, Chengdu, 611137, People's Republic of China
| |
Collapse
|
30
|
Bouz G, Doležal M. Advances in Antifungal Drug Development: An Up-To-Date Mini Review. Pharmaceuticals (Basel) 2021; 14:1312. [PMID: 34959712 PMCID: PMC8706862 DOI: 10.3390/ph14121312] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2021] [Revised: 12/11/2021] [Accepted: 12/14/2021] [Indexed: 12/20/2022] Open
Abstract
The utility of clinically available antifungals is limited by their narrow spectrum of activity, high toxicity, and emerging resistance. Antifungal drug discovery has always been a challenging area, since fungi and their human host are eukaryotes, making it difficult to identify unique targets for antifungals. Novel antifungals in clinical development include first-in-class agents, new structures for an established target, and formulation modifications to marketed antifungals, in addition to repurposed agents. Membrane interacting peptides and aromatherapy are gaining increased attention in the field. Immunotherapy is another promising treatment option, with antifungal antibodies advancing into clinical trials. Novel targets for antifungal therapy are also being discovered, allowing the design of new promising agents that may overcome the resistance issue. In this mini review, we will summarize the current status of antifungal drug pipelines in clinical stages, and the most recent advancements in preclinical antifungal drug development, with special focus on their chemistry.
Collapse
Affiliation(s)
- Ghada Bouz
- Faculty of Pharmacy in Hradec Králové, Charles University, 50005 Hradec Králové, Czech Republic
| | - Martin Doležal
- Faculty of Pharmacy in Hradec Králové, Charles University, 50005 Hradec Králové, Czech Republic
| |
Collapse
|
31
|
David V, Andrea AN, Aleksandr K, Lourdes JA, Eugenia P, Nancy C, Isabel W, Jessica C, León-Tamariz F. Validation of a method of broth microdilution for the determination of antibacterial activity of essential oils. BMC Res Notes 2021; 14:439. [PMID: 34857039 PMCID: PMC8638534 DOI: 10.1186/s13104-021-05838-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2021] [Accepted: 11/10/2021] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE The aim of the present study was to adapt and optimize a broth microdilution method and compare it to the agar dilution method for the evaluation of activity of essential oils from medicinal plants against Gram-negative bacteria. Based on bibliographic research, active and not active oils were selected. The sensitivity and specificity were established as parameters for validation. The comparison between both methods was made using contingency analysis tables, based on the observed frequencies. For both methods, the minimum inhibitory concentration was determined against Escherichia coli strains, in an essential oil concentration range between 0.03 and 0.48% (v/v). RESULTS A stable emulsion formation was achieved with the addition of Tween 80 and constant agitation, guaranteeing the continuous contact of oil with bacteria (critical step in the microdilution method). The statistical analysis of results obtained with both methods presented a good sensitivity and specificity (100% in both cases), which let us correctly discriminate between active and non-active oils. The values obtained for the minimal inhibitory concentration were independent of the technique used. Finally, the obtained results show that the validated microtechnique allows important diminishment of time and resources for investigations dealing with essential oils or lipophilic extracts evaluation.
Collapse
Affiliation(s)
- Vanegas David
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Abril-Novillo Andrea
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Khachatryan Aleksandr
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Jerves-Andrade Lourdes
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Peñaherrera Eugenia
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Cuzco Nancy
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Wilches Isabel
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Calle Jessica
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador
| | - Fabián León-Tamariz
- Deparment of Biosciences, Group of Medicinal Plants and Natural Products, Faculty of Chemistry, School of Biochemistry and Pharmacy, Universidad de Cuenca, Cuenca, Ecuador.
| |
Collapse
|
32
|
Chen X, Wu J, Sun L, Nie J, Su S, Sun S. Antifungal Effects and Potential Mechanisms of Benserazide Hydrochloride Alone and in Combination with Fluconazole Against Candida albicans. Drug Des Devel Ther 2021; 15:4701-4711. [PMID: 34815665 PMCID: PMC8605804 DOI: 10.2147/dddt.s336667] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2021] [Accepted: 10/29/2021] [Indexed: 01/23/2023] Open
Abstract
Purpose The resistance of C. albicans to traditional antifungal drugs brings a great challenge to clinical treatment. To overcome the resistance, developing antifungal agent sensitizers has attracted considerable attention. This study aimed to determine the anti-Candida activity of BEH alone or BEH–FLC combination and to explore the underlying mechanisms. Materials and Methods In vitro antifungal effects were performed by broth microdilution assay and XTT reduction assay. Infected Galleria mellonella larvae model was used to determine the antifungal effects in vivo. Probes Fluo-3/AM, FITC-VAD-FMK and rhodamine 6G were used to study the influence of BEH and FLC on intracellular calcium concentration, metacaspase activity and drug efflux of C. albicans. Results BEH alone exhibited obvious antifungal activities against C. albicans. BEH plus FLC not only showed synergistic effects against planktonic cells and preformed biofilms within 8 h but also enhanced the antifungal activity in infected G. mellonella larvae. Mechanistic studies indicated that antifungal effects of drugs might be associated with the increasement of calcium concentration, activation of metacaspase activity to reduce virulence and anti-biofilms, but were not related to drug efflux. Conclusion BEH alone or combined with FLC displayed potent antifungal activity both in vitro and in vivo, and the underlying mechanisms were related to reduced virulence factors.
Collapse
Affiliation(s)
- Xueqi Chen
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, People's Republic of China.,Department of Pharmacy, China-Japan Friendship Hospital, Beijing, People's Republic of China
| | - Jiyong Wu
- Department of Pharmacy, Shandong Second Provincial General Hospital, Jinan, People's Republic of China
| | - Lei Sun
- Department of Pharmacy, Shandong Second Provincial General Hospital, Jinan, People's Republic of China
| | - Jing Nie
- Department of Pharmacy, Shandong Second Provincial General Hospital, Jinan, People's Republic of China
| | - Shan Su
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, People's Republic of China.,Department of Pharmacy, China-Japan Friendship Hospital, Beijing, People's Republic of China
| | - Shujuan Sun
- Department of Clinical Pharmacy, The First Affiliated Hospital of Shandong First Medical University & Shandong Provincial Qianfoshan Hospital, Shandong Engineering and Technology Research Center for Pediatric Drug Development, Shandong Medicine and Health Key Laboratory of Clinical Pharmacy, Jinan, People's Republic of China.,Department of Pharmacy, Shandong Second Provincial General Hospital, Jinan, People's Republic of China
| |
Collapse
|
33
|
Yasin J, Ayalew G, Dagnaw M, Shiferaw G, Mekonnen F. Vulvovaginitis Prevalence Among Women in Gondar, Northwest Ethiopia: Special Emphasis on Aerobic Vaginitis Causing Bacterial Profile, Antimicrobial Susceptibility Pattern, and Associated Factors. Infect Drug Resist 2021; 14:4567-4580. [PMID: 34754204 PMCID: PMC8572045 DOI: 10.2147/idr.s337205] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/20/2021] [Indexed: 01/13/2023] Open
Abstract
Background Genital tract infections are posing a series of public health challenges for women in both developed and developing countries. Microbial infections of the vagina can lead to serious medical complications such as preterm labor, amniotic fluid infection, premature rupture of the fetal membranes, and low birth weight of the neonate, leading to high perinatal morbidity and mortality. In Ethiopia, limited information is found on the burden, antimicrobial susceptibility profile and associated factors for aerobic vaginitis. Thus, this study was aimed to determine the burden of AV, antimicrobial susceptibility profile of aerobic bacterial isolates and associated factors among women attending Gondar town health facilities, northwest Ethiopia. Methods A health facility-based cross-sectional study was conducted on 214 study participants from February 1 to May 31, 2019. For all consecutive women, demographic variables were collected using a structured questionnaire and two vaginal swabs for each were collected. The diagnosis of AV and BV was based on the composite score of Donders and Nugent criteria, respectively. All bacteria were isolated and characterized by conventional culture techniques. The antimicrobial susceptibility pattern was performed using the disc diffusion technique. Logistic regression, univariate and multivariate analysis were carried out. A p-value ≤ 0.05 at 95% CI was considered as statistically significant. Results The overall prevalence of vulvovaginitis among women was 50%. The identified aetiologies of vulvovaginitis were bacterial vaginosis (35.5%), candidiasis (23.8%), aerobic vaginitis (22.9%) and trichomoniasis (3.3%). Aerobic bacteria, especially Enterococcus faecalis and Escherichia coli, were predominantly isolated in the vaginal samples. The prevalence of the multidrug resistance rate was 38.98%. The isolated Gram positive bacteria were sensitive to antibiotics like vancomycin, cefoxitin, ciprofloxacin, clindamycin, and gentamicin, whereas the Gram negative bacteria isolates were sensitive to ciprofloxacin, gentamicin and meropenem. Conclusion The high burden of bacterial vaginosis and aerobic vaginitis was reported. Therefore, regular screening of women using microbiological diagnosis should be promoted. The common bacteria isolated were Enterococcus faecalis and Escherichia coli. Additionally, antibiotics like vancomycin, cefoxitin, ciprofloxacin, clindamycin, gentamicin, and meropenem were shown to have good action against the majority of bacteria isolates.
Collapse
Affiliation(s)
- Jemal Yasin
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, University of Gondar, Gondar, Ethiopia
| | - Getnet Ayalew
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, University of Gondar, Gondar, Ethiopia
| | - Mulat Dagnaw
- Department of Medical Microbiology, School of Biomedical and Laboratory Sciences, University of Gondar, Gondar, Ethiopia
| | - Getachew Shiferaw
- Department of Gynecology and Obstetrics, School of Medicine, University of Gondar, Gondar, Ethiopia
| | - Feleke Mekonnen
- Department of Medical Laboratory Sciences, School of Health Sciences, College of Medicine and Health Sciences, Bahir Dar University, Bahir Dar, Ethiopia
| |
Collapse
|
34
|
Landi L, Peralta-Ruiz Y, Chaves-López C, Romanazzi G. Chitosan Coating Enriched With Ruta graveolens L. Essential Oil Reduces Postharvest Anthracnose of Papaya ( Carica papaya L.) and Modulates Defense-Related Gene Expression. FRONTIERS IN PLANT SCIENCE 2021; 12:765806. [PMID: 34858463 PMCID: PMC8632526 DOI: 10.3389/fpls.2021.765806] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Accepted: 10/05/2021] [Indexed: 06/13/2023]
Abstract
Anthracnose of papaya (Carica papaya L.) caused by the fungus Colletotrichum spp. is one of the most economically important postharvest diseases. Coating with chitosan (CS) and Ruta graveolens essential oil (REO) might represent a novel eco-friendly method to prevent postharvest anthracnose infection. These compounds show both antimicrobial and eliciting activities, although the molecular mechanisms in papaya have not been investigated to date. In this study, the effectiveness of CS and REO alone and combined (CS-REO) on postharvest anthracnose of papaya fruit during storage were investigated, along with the expression of selected genes involved in plant defense mechanisms. Anthracnose incidence was reduced with CS, REO, and CS-REO emulsions after 9 days storage at 25°C, by 8, 21, and 37%, respectively, with disease severity reduced by 22, 29, and 44%, respectively. Thus, McKinney's decay index was reduced by 22, 30, and 44%, respectively. A protocol based on reverse transcription quantitative real-time PCR (RT-qPCR) was validated for 17 papaya target genes linked to signaling pathways that regulate plant defense, pathogenesis-related protein, cell wall-degrading enzymes, oxidative stress, abiotic stress, and the phenylpropanoid pathway. CS induced gene upregulation mainly at 6 h posttreatment (hpt) and 48 hpt, while REO induced the highest upregulation at 0.5 hpt, which then decreased over time. Furthermore, CS-REO treatment delayed gene upregulation by REO alone, from 0.5 to 6 hpt, and kept that longer over time. This study suggests that CS stabilizes the volatile and/or hydrophobic substances of highly reactive essential oils. The additive effects of CS and REO were able to reduce postharvest decay and affect gene expression in papaya fruit.
Collapse
Affiliation(s)
- Lucia Landi
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
| | - Yeimmy Peralta-Ruiz
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
- Facultad de Ingeniería, Programa de Ingeniería Agroindustrial, Universidad del Atlántico, Puerto Colombia, Colombia
| | - Clemencia Chaves-López
- Faculty of Bioscience and Technology for Food, Agriculture and Environment, University of Teramo, Teramo, Italy
| | - Gianfranco Romanazzi
- Department of Agricultural, Food and Environmental Sciences, Marche Polytechnic University, Ancona, Italy
| |
Collapse
|
35
|
Yamada Y. RPD3 and UME6 are involved in the activation of PDR5 transcription and pleiotropic drug resistance in ρ 0 cells of Saccharomyces cerevisiae. BMC Microbiol 2021; 21:311. [PMID: 34753419 PMCID: PMC8576940 DOI: 10.1186/s12866-021-02373-1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 10/25/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND In Saccharomyces cerevisiae, the retrograde signalling pathway is activated in ρ0/- cells, which lack mitochondrial DNA. Within this pathway, the activation of the transcription factor Pdr3 induces transcription of the ATP-binding cassette (ABC) transporter gene, PDR5, and causes pleiotropic drug resistance (PDR). Although a histone deacetylase, Rpd3, is also required for cycloheximide resistance in ρ0/- cells, it is currently unknown whether Rpd3 and its DNA binding partners, Ume6 and Ash1, are involved in the activation of PDR5 transcription and PDR in ρ0/- cells. This study investigated the roles of RPD3, UME6, and ASH1 in the activation of PDR5 transcription and PDR by retrograde signalling in ρ0 cells. RESULTS ρ0 cells in the rpd3∆ and ume6∆ strains, with the exception of the ash1∆ strain, were sensitive to fluconazole and cycloheximide. The PDR5 mRNA levels in ρ0 cells of the rpd3∆ and ume6∆ strains were significantly reduced compared to the wild-type and ash1∆ strain. Transcriptional expression of PDR5 was reduced in cycloheximide-exposed and unexposed ρ0 cells of the ume6∆ strain; the transcriptional positive response of PDR5 to cycloheximide exposure was also impaired in this strain. CONCLUSIONS RPD3 and UME6 are responsible for enhanced PDR5 mRNA levels and PDR by retrograde signalling in ρ0 cells of S. cerevisiae.
Collapse
Affiliation(s)
- Yoichi Yamada
- Faculty of Biological Science and Technology, Institute of Science and Engineering, Kanazawa University, Kanazawa, 920-1164, Japan.
| |
Collapse
|
36
|
Antifungal and Anti-Biofilm Effects of Caffeic Acid Phenethyl Ester on Different Candida Species. Antibiotics (Basel) 2021; 10:antibiotics10111359. [PMID: 34827297 PMCID: PMC8614700 DOI: 10.3390/antibiotics10111359] [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: 09/30/2021] [Revised: 10/31/2021] [Accepted: 11/03/2021] [Indexed: 11/16/2022] Open
Abstract
This study investigated the effect of CAPE on planktonic growth, biofilm-forming abilities, mature biofilms, and cell death of C. albicans, C. tropicalis, C. glabrata, and C. parapsilosis strains. Our results showed a strain- and dose-dependent effect of CAPE on Candida, and the MIC values were between 12.5 and 100 µg/mL. Similarly, the MBIC values of CAPE ranging between 50 and 100 µg/mL highlighted the inhibition of the biofilm-forming abilities in a dose-dependent manner, as well. However, CAPE showed a weak to moderate biofilm eradication ability (19-49%) on different Candida strains mature biofilms. Both caspase-dependent and caspase-independent apoptosis after CAPE treatment were observed in certain tested Candida strains. Our study has displayed typical apoptotic hallmarks of CAPE-induced chromatin margination, nuclear blebs, nuclear condensation, plasma membrane detachment, enlarged lysosomes, cytoplasm fragmentation, cell wall distortion, whole-cell shrinkage, and necrosis. In conclusion, CAPE has a concentration and strain-dependent inhibitory activity on viability, biofilm formation ability, and cell death response in the different Candida species.
Collapse
|
37
|
Antibacterial, Antihemolytic, Cytotoxic, Anticancer, and Antileishmanial Effects of Ajuga bracteosa Transgenic Plants. PLANTS 2021; 10:plants10091894. [PMID: 34579426 PMCID: PMC8473257 DOI: 10.3390/plants10091894] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2021] [Revised: 09/06/2021] [Accepted: 09/08/2021] [Indexed: 01/16/2023]
Abstract
Herbal and traditional medicines can play a pivotal role in combating cancer and neglected tropical diseases. Ajuga bracteosa, family Lamiaceae, is an important medicinal plant. The genetic transformation of A. bracteosa with rol genes of Agrobacterium rhizogenes further enhances its metabolic content. This study aimed at undertaking the molecular, phytochemical, and in vitro biological analysis of A. bracteosa extracts. We transformed the A. bracteosa plant with rol genes and raised the regenerants from the hairy roots. Transgenic integration and expression of rolB were confirmed by conventional polymerase chain reaction (PCR) and qPCR analysis. The methanol: chloroform crude extracts of wild-type plants and transgenic regenerants were screened for in vitro antibacterial, antihemolytic, cytotoxic, anticancer, and leishmanial activity. Among all plants, transgenic line 3 (ABRL3) showed the highest expression of the rolB gene. Fourier transform infra-red (FTIR) analysis confirmed the enhanced number of functional groups of active compounds in all transgenic lines. Moreover, ABRL3 exhibited the highest antibacterial activity, minimum hemolytic activity (CC50 = 7293.05 ± 7 μg/mL) and maximum antileishmanial activity (IC50 of 56.16 ± 2 μg/mL). ABRL1 demonstrated the most prominent brine shrimp cytotoxicity (LD5039.6 ± 4 μg/mL). ABRL3 was most effective against various human cancer cell lines with an IC50 of 57.1 ± 2.2 μg/mL, 46.2 ± 1.1 μg/mL, 72.4 ± 1.3 μg/mL, 73.3 ± 2.1 μg/mL, 98.7 ± 1.6 μg/mL, and 97.1 ± 2.5 μg/mL against HepG2, LM3, A549, HT29, MCF-7, and MDA-MB-231, respectively. Overall, these transgenic extracts may offer a cheaper therapeutic source than the more expensive synthetic drugs.
Collapse
|
38
|
Jafaar HJ, Isbilen O, Volkan E, Sariyar G. Alkaloid profiling and antimicrobial activities of Papaver glaucum and P. decaisnei. BMC Res Notes 2021; 14:348. [PMID: 34496958 PMCID: PMC8424945 DOI: 10.1186/s13104-021-05762-x] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Accepted: 08/26/2021] [Indexed: 11/10/2022] Open
Abstract
OBJECTIVE Papaver decaisnei Hochst. & Steud. Ex Elkan and Papaver glaucum Boiss. & Hausskn. growing wild in Northern Iraq have been historically used for medicinal purposes. In this study, both species were evaluated for their alkaloid content and antimicrobial activities. RESULTS Alkaloids were extracted and isolated by preparative thin-layer chromatography (TLC). Identification was carried out by comparing spectral data (UV and 1H-NMR) and TLC Rf values with those of authentic samples. Two alkaloids, proapaorphine-type mecambrine and aporphine-type roemerine were isolated from P. decaisnei. Two benzylisoquinoline type alkaloids papaverine (major alkaloid) and palaudine as well as aporphine-type N-methylasimilobine have been obtained in P. glaucum. Both P. glaucum and P. decaisnei extracts revealed strong antimicrobial activity on Pseudomonas aeruginosa ATCC 27853 and Enterococcus faecalis ATCC 29212. Collectively these results indicate that P. glaucum and P. decaisnei are promising sources of alkaloids that could further be investigated for medicinal purposes.
Collapse
Affiliation(s)
- Hawraz Jawdat Jafaar
- Faculty of Pharmacy, Cyprus International University, via Mersin 10, 99258, Nicosia, Northern Cyprus, Turkey
| | - Ovgu Isbilen
- Faculty of Pharmacy, Cyprus International University, via Mersin 10, 99258, Nicosia, Northern Cyprus, Turkey.
- Biotechnology Research Center, Cyprus International University, via Mersin 10, 99258, Nicosia, Northern Cyprus, Turkey.
| | - Ender Volkan
- Faculty of Pharmacy, Cyprus International University, via Mersin 10, 99258, Nicosia, Northern Cyprus, Turkey
- Biotechnology Research Center, Cyprus International University, via Mersin 10, 99258, Nicosia, Northern Cyprus, Turkey
| | - Gunay Sariyar
- Faculty of Pharmacy, Cyprus International University, via Mersin 10, 99258, Nicosia, Northern Cyprus, Turkey
| |
Collapse
|
39
|
Nahar L, El-Seedi HR, Khalifa SAM, Mohammadhosseini M, Sarker SD. Ruta Essential Oils: Composition and Bioactivities. Molecules 2021; 26:4766. [PMID: 34443352 PMCID: PMC8400350 DOI: 10.3390/molecules26164766] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Revised: 08/03/2021] [Accepted: 08/04/2021] [Indexed: 11/16/2022] Open
Abstract
Ruta L. is a typical genus of the citrus family, Rutaceae Juss. and comprises ca. 40 different species, mainly distributed in the Mediterranean region. Ruta species have long been used in traditional medicines as an abortifacient and emmenagogue and for the treatment of lung diseases and microbial infections. The genus Ruta is rich in essential oils, which predominantly contain aliphatic ketones, e.g., 2-undecanone and 2-nonanone, but lack any significant amounts of terpenes. Three Ruta species, Ruta chalepensis L., Ruta graveolens L., and Ruta montana L., have been extensively studied for the composition of their essential oils and several bioactivities, revealing their potential medicinal and agrochemical applications. This review provides a systematic evaluation and critical appraisal of publications available in the literature on the composition and bioactivities of the essential oils obtained from Ruta species and includes a brief outlook of the potential applications of nanotechnology and chitosan-based products of Ruta essential oils.
Collapse
Affiliation(s)
- Lutfun Nahar
- Laboratory of Growth Regulators, Institute of Experimental Botany ASCR & Palacký University, Šlechtitelů 27, 78371 Olomouc, Czech Republic
| | - Hesham R. El-Seedi
- Biomedical Centre (BMC), Pharmacognosy Group, Department of Pharmaceutical Biosciences, Uppsala University, Box 591, SE-751 24 Uppsala, Sweden;
| | - Shaden A. M. Khalifa
- Department of Molecular Biosciences, The Wenner-Gren Institute, Stockholm University, SE-106 91 Stockholm, Sweden;
| | - Majid Mohammadhosseini
- Department of Chemistry, College of Basic Sciences, Shahrood Branch, Islamic Azad University, Shahrood, Iran;
| | - Satyajit D. Sarker
- Centre for Natural Products Discovery (CNPD), School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, James Parsons Building, Byrom Street, Liverpool L3 3AF, UK
| |
Collapse
|
40
|
Lin L, Long N, Qiu M, Liu Y, Sun F, Dai M. The Inhibitory Efficiencies of Geraniol as an Anti-Inflammatory, Antioxidant, and Antibacterial, Natural Agent Against Methicillin-Resistant Staphylococcus aureus Infection in vivo. Infect Drug Resist 2021; 14:2991-3000. [PMID: 34385822 PMCID: PMC8352600 DOI: 10.2147/idr.s318989] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2021] [Accepted: 06/26/2021] [Indexed: 12/13/2022] Open
Abstract
Introduction Antibiotics wee widely used as feed additives in animal husbandry. With the increase of drug resistance of bacteria, there is an urgent need to find alternatives to antibiotics. Clinically, methicillin-resistant Staphylococcus aureus (MRSA) infections account for about 25% to 50% of Staphylococcus aureus infections worldwide. Similarly, it is also one of the pathogens that cause serious animal infections. Methods We established a mouse model of systemic infection of MRSA to study the preventive effect of geraniol on MRSA and the immunomodulatory effect of geraniol. The mice in the experiment were injected with geraniol by intramuscular injection and were fed intraperitoneally with minimum lethal dose of MRSA. Then, the survival rate, inflammatory cytokines, oxidative stress factors in serum were measured. These values were used to estimate the bacterial load in different organs and to assess histopathological changes in the lungs, liver and kidneys. Results The above-mentioned two ways of using geraniol could prevent MRSA infection in vivo in mice and showed a significant dose–response relationship. In other words, geraniol significantly decreased the concentrations of inflammatory cytokines and oxidative stress factors in MRSA-infected mice. At the same time, the level of glutathione peroxidase also increased in a dose–proportional relationship. In the group of mice treated with geraniol, their superoxide dismutase levels were significantly higher than those in the vancomycin. After treatment with geraniol, the burden of MRSA decreased. No obvious histopathological abnormalities were found in the liver and kidney of MRSA-infected mice. In addition, geraniol improved the inflammatory changes in the lungs. Conclusion The results indicated that geraniol was a natural substance that could be used as an anti-inflammatory, antioxidant and antibacterial substance to protect mice from MRSA systemic infection. Generally, the research shows that as a natural medicine, geraniol has broad potential in the development and application of antibiotic substitutes.
Collapse
Affiliation(s)
- Lin Lin
- School of Laboratory Medicine, Chengdu Medical College, Chengdu, Sichuan, People's Republic of China.,Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, 610500, Sichuan, People's Republic of China
| | - Nana Long
- School of Laboratory Medicine, Chengdu Medical College, Chengdu, Sichuan, People's Republic of China.,Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, 610500, Sichuan, People's Republic of China
| | - Min Qiu
- School of Laboratory Medicine, Chengdu Medical College, Chengdu, Sichuan, People's Republic of China.,Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, 610500, Sichuan, People's Republic of China
| | - Yao Liu
- School of Laboratory Medicine, Chengdu Medical College, Chengdu, Sichuan, People's Republic of China
| | - Fenghui Sun
- School of Laboratory Medicine, Chengdu Medical College, Chengdu, Sichuan, People's Republic of China.,Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, 610500, Sichuan, People's Republic of China
| | - Min Dai
- School of Laboratory Medicine, Chengdu Medical College, Chengdu, Sichuan, People's Republic of China.,Sichuan Provincial Engineering Laboratory for Prevention and Control Technology of Veterinary Drug Residue in Animal-origin Food, Chengdu Medical College, Chengdu, 610500, Sichuan, People's Republic of China
| |
Collapse
|
41
|
Rekadwad BN, Li WJ, Rekha PD. The diversity of unique 1,4,5,6-Tetrahydro-2-methyl-4-pyrimidinecarboxylic acid coding common genes and Universal stress protein in Ectoine TRAP cluster (UspA) in 32 Halomonas species. BMC Res Notes 2021; 14:296. [PMID: 34344424 PMCID: PMC8330102 DOI: 10.1186/s13104-021-05689-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2021] [Accepted: 07/07/2021] [Indexed: 11/16/2022] Open
Abstract
OBJECTIVES To decipher the diversity of unique ectoine-coding housekeeping genes in the genus Halomonas. RESULTS In Halomonas, 1,4,5,6-Tetrahydro-2-methyl-4-pyrimidinecarboxylic acid has a crucial role as a stress-tolerant chaperone, a compatible solute, a cell membrane stabilizer, and a reduction in cell damage under stressful conditions. Apart from the current 16S rRNA biomarker, it serves as a blueprint for identifying Halomonas species. Halomonas elongata 1H9 was found to have 11 ectoine-coding genes. The presence of a superfamily of conserved ectoine-coding among members of the genus Halomonas was discovered after genome annotations of 93 Halomonas spp. As a result of the inclusion of 11 single copy ectoine coding genes in 32 Halomonas spp., genome-wide evaluations of ectoine coding genes indicate that 32 Halomonas spp. have a very strong association with H. elongata 1H9, which has been proven evidence-based approach to elucidate phylogenetic relatedness of ectoine-coding child taxa in the genus Halomonas. Total 32 Halomonas species have a single copy number of 11 distinct ectoine-coding genes that help Halomonas spp., produce ectoine under stressful conditions. Furthermore, the existence of the Universal stress protein (UspA) gene suggests that Halomonas species developed directly from primitive bacteria, highlighting its role during the progression of microbial evolution.
Collapse
Affiliation(s)
- Bhagwan Narayan Rekadwad
- Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Deralakatte, Mangalore, Karnataka 575018 India
| | - Wen-Jun Li
- State Key Laboratory of Biocontrol, Guangdong Provincial Key Laboratory of Plant Resources and Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai), School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510275 China
| | - P. D. Rekha
- Yenepoya Research Centre, Yenepoya (Deemed to be University), University Road, Deralakatte, Mangalore, Karnataka 575018 India
| |
Collapse
|
42
|
In Vitro Confirmation of Siramesine as a Novel Antifungal Agent with In Silico Lead Proposals of Structurally Related Antifungals. Molecules 2021; 26:molecules26123504. [PMID: 34201401 PMCID: PMC8230181 DOI: 10.3390/molecules26123504] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2021] [Revised: 06/01/2021] [Accepted: 06/04/2021] [Indexed: 12/12/2022] Open
Abstract
The limited number of medicinal products available to treat of fungal infections makes control of fungal pathogens problematic, especially since the number of fungal resistance incidents increases. Given the high costs and slow development of new antifungal treatment options, repurposing of already known compounds is one of the proposed strategies. The objective of this study was to perform in vitro experimental tests of already identified lead compounds in our previous in silico drug repurposing study, which had been conducted on the known Drugbank database using a seven-step procedure which includes machine learning and molecular docking. This study identifies siramesine as a novel antifungal agent. This novel indication was confirmed through in vitro testing using several yeast species and one mold. The results showed susceptibility of Candida species to siramesine with MIC at concentration 12.5 µg/mL, whereas other candidates had no antifungal activity. Siramesine was also effective against in vitro biofilm formation and already formed biofilm was reduced following 24 h treatment with a MBEC range of 50-62.5 µg/mL. Siramesine is involved in modulation of ergosterol biosynthesis in vitro, which indicates it is a potential target for its antifungal activity. This implicates the possibility of siramesine repurposing, especially since there are already published data about nontoxicity. Following our in vitro results, we provide additional in depth in silico analysis of siramesine and compounds structurally similar to siramesine, providing an extended lead set for further preclinical and clinical investigation, which is needed to clearly define molecular targets and to elucidate its in vivo effectiveness as well.
Collapse
|
43
|
Liu F, Zhong L, Zhou F, Zheng C, Zhang K, Cai J, Zhou H, Tang K, Dong Z, Cui W, Zhang G. Clinical Features, Strain Distribution, Antifungal Resistance and Prognosis of Patients with Non -albicans Candidemia: A Retrospective Observational Study. Infect Drug Resist 2021; 14:3233-3246. [PMID: 34429621 PMCID: PMC8380288 DOI: 10.2147/idr.s323583] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Accepted: 07/28/2021] [Indexed: 12/21/2022] Open
Abstract
PURPOSE Candida albicans (C. albicans) candidemia has been well reported in previous studies, while research on non-albicans Candida (NAC) bloodstream infections remains poorly explored. Therefore, the present study aimed to investigate the clinical characteristics and outcomes of patients with NAC candidemia. PATIENTS AND METHODS We recruited inpatients with candidemia from January 2013 to June 2020 in a tertiary hospital for this retrospective observational study. RESULTS A total of 301 patients with candidemia were recruited in the current study, including 161 (53.5%) patients with NAC candidemia. The main pathogens in NAC candidemia were Candida tropicalis (C. tropicalis) (23.9%), Candida parapsilosis (15.6%) and Candida glabrata (10.3%). Patients with NAC candidemia had more medical admissions (P=0.034), a higher percentage of hematological malignancies (P=0.007), a higher frequency of antifungal exposure (P=0.012), and more indwelling peripherally inserted central catheters (P=0.002) than those with C. albicans candidemia. In a multivariable analysis, prior antifungal exposure was independently related to NAC candidemia (adjusted odds ratio [aOR], 0.312; 95% confidence interval [CI], 0.113-0.859). Additionally, NAC was obviously resistant to azoles, especially C. tropicalis had a high cross-resistance to azoles. However, no significant differences were noted in the mortality rates at 14 days, 28 days and 60 days between these two groups. CONCLUSION NAC is dominant in candidemia, and prior antifungal exposure is an independent risk factor. Of note, although the outcomes of NAC and C. albicans candidemia are similar, drug resistance to specific azoles as well as cross-resistance frequently occurs in patients with NAC candidemia, and this drug resistance deserves attention in clinical practice and further in-depth investigation.
Collapse
Affiliation(s)
- Fengqi Liu
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, People’s Republic of China
- Department of Critical Care Medicine, First Affiliated Hospital, Huzhou Teachers College, The First People’s Hospital of Huzhou, Huzhou, 313000, Zhejiang, People’s Republic of China
| | - Li Zhong
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, People’s Republic of China
- Department of Critical Care Medicine, First Affiliated Hospital, Huzhou Teachers College, The First People’s Hospital of Huzhou, Huzhou, 313000, Zhejiang, People’s Republic of China
| | - Feifei Zhou
- Department of Critical Care Medicine, Ningbo Medical Center, Li Huili Hospital, Ningbo, Zhejiang, 315040, People’s Republic of China
| | - Cheng Zheng
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, People’s Republic of China
- Department of Critical Care Medicine, Taizhou Municipal Hospital, Taizhou, Zhejiang, 318000, People’s Republic of China
| | - Kai Zhang
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, People’s Republic of China
| | - Jiachang Cai
- Department of Clinical Microbiology Laboratory, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, People’s Republic of China
| | - Hongwei Zhou
- Department of Clinical Microbiology Laboratory, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, 310009, People’s Republic of China
| | - Kankai Tang
- Department of Critical Care Medicine, First Affiliated Hospital, Huzhou Teachers College, The First People’s Hospital of Huzhou, Huzhou, 313000, Zhejiang, People’s Republic of China
| | - Zhaohui Dong
- Department of Critical Care Medicine, First Affiliated Hospital, Huzhou Teachers College, The First People’s Hospital of Huzhou, Huzhou, 313000, Zhejiang, People’s Republic of China
| | - Wei Cui
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, People’s Republic of China
| | - Gensheng Zhang
- Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, 310009, People’s Republic of China
- Correspondence: Gensheng Zhang; Wei Cui Department of Critical Care Medicine, Second Affiliated Hospital, Zhejiang University School of Medicine, cc88 Jiefang Road, Hangzhou, 310009, People’s Republic of ChinaTel +86-571-8778-3636; +86-571-8778-3551Fax +86-571- 87022776 Email ;
| |
Collapse
|