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Yapa P, Munaweera I, Weerasekera MM, Weerasinghe L, Sandaruwan C. Potential antifungal applications of heterometallic silica nanohybrids: A synergistic activity. BIOMATERIALS ADVANCES 2024; 162:213930. [PMID: 38909600 DOI: 10.1016/j.bioadv.2024.213930] [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: 04/16/2024] [Revised: 05/21/2024] [Accepted: 06/18/2024] [Indexed: 06/25/2024]
Abstract
An estimated 1.7 million fatalities and 150 million cases worldwide are attributed to fungal infections annually, that are in rise due to immunocompromised patient population. The challenges posed by traditional treatments can be addressed with the help of nanotechnology advancements. In this study, Co, Cu, and Ag-were doped into silica nanoparticles. Then the synthesized monometallic silica nanohybrids were combined to formulate heterometallic silica nanohybrids, characterized structurally and morphologically, compared, and evaluated for antifungal activity based on their individual and synergistic activity. The antifungal assays were conducted by using ATCC cultures of Candida albicans and QC samples of Trichophyton rubrum, Microsporum gypseum, and Aspergillus niger. The MIC (ranging from 49.00 to 1560.00 μg/mL), MFC (ranging from 197.00 to 3125.00 μg/mL), IC50 values (ranging from 31.10 to 400.80 μg/mL), and FICI of nanohybrids were determined and compared. Moreover, well diffusion assay was performed. ABTS assay and DPPH assay were conducted to investigate the radical scavenging activity (RSA) of nanohybrids. SEM analysis clearly evidenced the structural deformations of each fungal cells and spores due to the treatment with trimetallic nanohybrid. According to the results, the trimetallic silica nanohybrids exhibited the most powerful synergistic RSA and the most effective antifungal activity, compared to the bimetallic silica nanohybrids.
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Affiliation(s)
- Piumika Yapa
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Imalka Munaweera
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka.
| | - Manjula M Weerasekera
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Laksiri Weerasinghe
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda 10250, Sri Lanka
| | - Chanaka Sandaruwan
- Sri Lanka Institute of Nanotechnology (SLINTEC), Homagama 10200, Sri Lanka; Department of Aerospace Engineering, Khalifa University of Science & Technology, 127788, Abu Dhabi, United Arab Emirates
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The Link between Oral and Gut Microbiota in Inflammatory Bowel Disease and a Synopsis of Potential Salivary Biomarkers. APPLIED SCIENCES-BASEL 2020. [DOI: 10.3390/app10186421] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
The objective of this review is to provide recent evidence for the oral–gut axis connection and to discuss gastrointestinal (GI) immune response, inflammatory bowel disease (IBD) pathogenesis, and potential salivary biomarkers for determining GI health. IBD affects an estimated 1.3% of the US adult population. While genetic predisposition and environment play a role, abnormal immune activity and microbiota dysbiosis within the gastrointestinal tract are also linked in IBD pathogenesis. It has been inferred that a reduced overall richness of bacterial species as well as colonization of opportunistic bacteria induce systemic inflammation in the GI tract. Currently, there is supporting evidence that both oral and gut microbiota may be related to the development of IBD. Despite this, there are currently no curative therapies for IBD, and diagnosis requires samples of blood, stool, and invasive diagnostic imaging techniques. Considering the relative ease of collection, emerging evidence of association with non-oral diseases may imply that saliva microbiome research may have the potential for gut diagnostic or prognostic value. This review demonstrates a link between saliva and intestinal profiles in IBD patients, suggesting that saliva sampling has the potential to serve as a non-invasive biomarker for gut diseases such as IBD in the oral–gut axis.
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Peremalo T, Madhavan P, Hamzah S, Than L, Wong EH, Nasir MDM, Chong PP, Ng KP. Antifungal susceptibilities, biofilms, phospholipase and proteinase activities in the Candida rugosa complex and Candida pararugosa isolated from tertiary teaching hospitals. J Med Microbiol 2019; 68:346-354. [DOI: 10.1099/jmm.0.000940] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Affiliation(s)
- T. Peremalo
- 1 School of Pharmacy, Taylor’s University Lakeside Campus, Subang Jaya, Selangor Darul Ehsan, Malaysia
| | - P. Madhavan
- 2 School of Medicine, Taylor’s University Lakeside Campus, Subang Jaya, Selangor Darul Ehsan, Malaysia
| | - S. Hamzah
- 1 School of Pharmacy, Taylor’s University Lakeside Campus, Subang Jaya, Selangor Darul Ehsan, Malaysia
| | - L. Than
- 3 Department of Medical Microbiology and Parasitology, University Putra Malaysia, Selangor Darul Ehsan, Malaysia
| | - E. H. Wong
- 2 School of Medicine, Taylor’s University Lakeside Campus, Subang Jaya, Selangor Darul Ehsan, Malaysia
| | - M. D. Mohd Nasir
- 4 Department of Biomedical Sciences, Faculty of Medicine and Health Sciences, University Putra Malaysia, Selangor Darul Ehsan, Malaysia
| | - P. P. Chong
- 5 School of Biosciences, Faculty of Health and Medical Sciences, Taylor’s University Lakeside Campus, Subang Jaya, Selangor Darul Ehsan, Malaysia
| | - K. P. Ng
- 6 Department of Biomedical Imaging, Faculty of Medicine, University Malaya Medical Centre, Kuala Lumpur, Malaysia
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Fortin O, Aguilar-Uscanga BR, Vu KD, Salmieri S, Lacroix M. Effect of Saccharomyces Boulardii Cell Wall Extracts on Colon Cancer Prevention in Male F344 Rats Treated with 1,2-Dimethylhydrazine. Nutr Cancer 2018; 70:632-642. [DOI: 10.1080/01635581.2018.1460672] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- Olivier Fortin
- INRS-Institut Armand-Frappier, Research Laboratories in Sciences Applied to Food, Laval, Quebec, Canada
| | - Blanca R. Aguilar-Uscanga
- Laboratorio de Microbiología Industrial, Centro Universitario de Ciencias Exactas e Ingenierías, Universidad de Guadalajara (UdG), Jalisco, Mexico
| | - Khanh D. Vu
- INRS-Institut Armand-Frappier, Research Laboratories in Sciences Applied to Food, Laval, Quebec, Canada
| | - Stephane Salmieri
- INRS-Institut Armand-Frappier, Research Laboratories in Sciences Applied to Food, Laval, Quebec, Canada
| | - Monique Lacroix
- INRS-Institut Armand-Frappier, Research Laboratories in Sciences Applied to Food, Laval, Quebec, Canada
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El-Latif Hesham A, Gupta VK, Singh BP. Use of PCR-denaturing gradient gel electrophoresis for the discrimination of Candida species isolated from natural habitats. Microb Pathog 2018; 120:19-22. [PMID: 29679651 DOI: 10.1016/j.micpath.2018.04.027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/10/2018] [Accepted: 04/14/2018] [Indexed: 10/17/2022]
Abstract
Candida species are opportunistic microbes that cause chronic infections for a human being. Therefore, the exact identification of Candida species is extremely important for improved therapeutic strategy against these species. Identification based on conventional methods cannot differentiate between some of yeasts species, hence PCR based molecular techniques and sequencing could be an alternative tool for the yeasts identification. A quick molecular method based on the polymerase chain reaction (PCR) and Denaturing Gradient Gel Electrophoresis (DGGE) was applied for distinguishing strains belonging to the Candida species. Six different species designated as AH-20, AH-21, AH-22, AH-23, AH-24 and AH-25 were isolated from soil samples, and their exact identification was detected based on the D1/D2 domain of the 26S rRNA gene amplification and sequence determination. Alignment results and the comparison of 26S rRNA gene sequences of the isolates to 26S rRNA gene sequences available in the GenBank database, as well as the phylogenetic analysis, confirmed the accurate position of the isolates as Candida intermedia strain AH-20, Candida boidinii strain AH-21, Candida tropicalis strain AH-22, Candida mengyuniae strain AH-23, Candida maltosa strain AH-24 and Candida maltosa strain AH-25. Fragments of the D1/D2 domain of 26S rRNA gene were amplified using NL1-GC/LS2 primers and separated by the DGGE. Results showed that all Candida species reported in this study were well discriminated by a distinct band in the DGGE profile. Our results demonstrated that DGGE technique using NL1-GC/LS2 primers could use for the rapid discrimination of yeast strains belonging to the same genera.
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Affiliation(s)
- Abd El-Latif Hesham
- Genetics Department, Faculty of Agriculture, Assiut University, 71526, Assiut, Egypt.
| | - Vijai Kumar Gupta
- Department of Chemistry and Biotechnology, ERA Chair of Green Chemistry, Tallinn University of Technology, 12618, Tallinn, Estonia
| | - Bhim Pratap Singh
- Department of Biotechnology, Aizawl, Mizoram University, Mizoram, 796004, India
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Weerasekera MM, Jayarathna TA, Wijesinghe GK, Gunasekara CP, Fernando N, Kottegoda N, Samaranayake LP. The Effect of Nutritive and Non-Nutritive Sweeteners on the Growth, Adhesion, and Biofilm Formation of Candida albicans and Candida tropicalis. Med Princ Pract 2017; 26:554-560. [PMID: 29131083 PMCID: PMC5848478 DOI: 10.1159/000484718] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 11/01/2017] [Indexed: 01/09/2023] Open
Abstract
OBJECTIVE To determine the effect of glucose, sucrose, and saccharin on growth, adhesion, and biofilm formation of Candida albicans and Candida tropicalis. MATERIALS AND METHODS The growth rates of mono-cultures of planktonic C. albicans and C. tropicalis and 1:1 mixed co-cultures were determined in yeast nitrogen broth supplemented with 5% (30 mM) and 10% (60 mM) glucose, sucrose, and saccharin, using optical density measurements at 2-h intervals over a 14-h period. Adhesion and biofilm growth were performed and the growth quantified using a standard 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay. The biofilm architecture was visualized using scanning electron microscopy. One- and two-way analysis of variance (ANOVA) was performed to analyse the differences among multiple means. RESULTS The highest planktonic growth was noted in 5% glucose after 14 h (p < 0.05). No significant planktonic growth was observed in either concentration of saccharin. Both the concentrations of glucose and sucrose elicited significantly increased adhesion from MTT activity of 0.017 to >0.019 in mono- as well as co-cultures (p < 0.05), whilst the lower concentration of saccharin significantly dampened the adhesion. Maximal biofilm growth was observed in both species with the lower concentration of sucrose (5%), although a similar concentration of saccharin abrogated biofilm development: the highest MTT value (>0.35) was obtained for glucose and the lowest (>0.15) for saccharin. CONCLUSION In this study, glucose and sucrose accelerated the growth, adhesion, and biofilm formation of Candida species. However, the non-nutritive sweetener saccharin appeared to dampen, and in some instances suppress, these virulent attributes of Candida.
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Affiliation(s)
- Manjula M. Weerasekera
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Thilini A. Jayarathna
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Gayan K. Wijesinghe
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Chinthika P. Gunasekara
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Neluka Fernando
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Nilwala Kottegoda
- Center for Advanced Material Research, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
- Department of Chemistry, Faculty of Applied Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
- Sri Lanka Institute of Nanotechnology, Nanoscience and Technology Park, Homagama, Sri Lanka
| | - Lakshman P. Samaranayake
- Department of Bioclinical Sciences, Faculty of Dentistry, Kuwait University, Kuwait City, Kuwait
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Dilhari A, Sampath A, Gunasekara C, Fernando N, Weerasekara D, Sissons C, McBain A, Weerasekera M. Evaluation of the impact of six different DNA extraction methods for the representation of the microbial community associated with human chronic wound infections using a gel-based DNA profiling method. AMB Express 2017; 7:179. [PMID: 28929383 PMCID: PMC5605482 DOI: 10.1186/s13568-017-0477-z] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2017] [Accepted: 09/05/2017] [Indexed: 12/25/2022] Open
Abstract
Infected chronic wounds are polymicrobial in nature which include a diverse group of aerobic and anaerobic microorganisms. Majority of these communal microorganisms are difficult to grow in vitro. DNA fingerprinting methods such as polymerase chain reaction-denaturation gradient gel electrophoresis (PCR-DGGE) facilitate the microbial profiling of complex ecosystems including infected chronic wounds. Six different DNA extraction methods were compared for profiling of the microbial community associated with chronic wound infections using PCR-DGGE. Tissue debris obtained from chronic wound ulcers of ten patients were used for DNA extraction. Total nucleic acid was extracted from each specimen using six DNA extraction methods. The yield, purity and quality of DNA was measured and used for PCR amplification targeting V2–V3 region of eubacterial 16S rRNA gene. QIAGEN DNeasy Blood and Tissue Kit (K method) produced good quality genomic DNA compared to the other five DNA extraction methods and gave a broad diversity of bacterial communities in chronic wounds. Among the five conventional methods, bead beater/phenol–chloroform based DNA extraction method with STES buffer (BP1 method) gave a yield of DNA with a high purity and resulted in a higher DGGE band diversity. Although DNA extraction using heat and NaOH had the lowest purity, DGGE revealed a higher bacterial diversity. The findings suggest that the quality and the yield of genomic DNA are influenced by the DNA extraction protocol, thus a method should be carefully selected in profiling a complex microbial community.
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M Weerasekera M, H Sissons C, Wong L, A Anderson S, R Holmes A, D Cannon R. Denaturing gradient gel electrophoresis profiles of bacteria from the saliva of twenty four different individuals form clusters that showed no relationship to the yeasts present. Arch Oral Biol 2017; 82:6-10. [PMID: 28577425 DOI: 10.1016/j.archoralbio.2017.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2016] [Revised: 04/25/2017] [Accepted: 05/20/2017] [Indexed: 10/19/2022]
Abstract
OBJECTIVES The aim was to investigate the relationship between groups of bacteria identified by cluster analysis of the DGGE fingerprints and the amounts and diversity of yeast present. METHODS Bacterial and yeast populations in saliva samples from 24 adults were analysed using denaturing gradient gel electrophoresis (DGGE) of the bacteria present and by yeast culture. RESULTS Eubacterial DGGE banding patterns showed considerable variation between individuals. Seventy one different amplicon bands were detected, the band number per saliva sample ranged from 21 to 39 (mean±SD=29.3±4.9). Cluster and principal component analysis of the bacterial DGGE patterns yielded three major clusters containing 20 of the samples. Seventeen of the 24 (71%) saliva samples were yeast positive with concentrations up to 103cfu/mL. Candida albicans was the predominant species in saliva samples although six other yeast species, including Candida dubliniensis, Candida tropicalis, Candida krusei, Candida guilliermondii, Candida rugosa and Saccharomyces cerevisiae, were identified. The presence, concentration, and species of yeast in samples showed no clear relationship to the bacterial clusters. CONCLUSION Despite indications of in vitro bacteria-yeast interactions, there was a lack of association between the presence, identity and diversity of yeasts and the bacterial DGGE fingerprint clusters in saliva. This suggests significant ecological individual-specificity of these associations in highly complex in vivo oral biofilm systems under normal oral conditions.
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Affiliation(s)
- Manjula M Weerasekera
- Dental Research Group, School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand; Department of Microbiology, Faculty of Medical Sciences,University of Sri Jayewardenepura, Sri Lanka.
| | - Chris H Sissons
- Dental Research Group, School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand
| | - Lisa Wong
- Dental Research Group, School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand
| | - Sally A Anderson
- Dental Research Group, School of Medicine and Health Sciences, University of Otago, Wellington, New Zealand
| | - Ann R Holmes
- Sir John Walsh Research Institute and Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
| | - Richard D Cannon
- Sir John Walsh Research Institute and Department of Oral Sciences, Faculty of Dentistry, University of Otago, Dunedin, New Zealand
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Sampath A, Weerasekera M, Gunasekara C, Dilhari A, Bulugahapitiya U, Fernando N. A sensitive and a rapid multiplex polymerase chain reaction for the identification of Candida species in concentrated oral rinse specimens in patients with diabetes. Acta Odontol Scand 2017; 75:113-122. [PMID: 27960572 DOI: 10.1080/00016357.2016.1265146] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
OBJECTIVES Oral candidiasis is being frequently recognized in patients with diabetes, and is associated with multiple pathogens including Candida albicans, Candida parapsilosis, Candida glabrata and Candida tropicalis. The aim of this study was to evaluate a usefulness of a Multiplex Polymerase Chain Reaction as a rapid diagnostic tool for identification of four oral Candida pathogens in patients with diabetes. MATERIALS AND METHODS A multiplex PCR was optimized to identify four Candida species in concentrated oral rinse samples. Common reverse primer, ITS4 and four species-specific forward primers targeting ITS1 and ITS2 regions of yeast genome were used. Species-specific single amplicon were detected by agarose gel electrophoresis. Performance efficacy of multiplex PCR was compared with phenotypic identification. RESULTS Out of 100 oral rinse samples, 72 were culture positive and of these 43 were at risk of oral Candida infection (>600cfu/ml). Multiple Candida species including C. albicans, C. parapsilosis and C. tropicalis were identified in 22 samples which had risk of oral Candida infection. In total, 85 patients were positive for Candida by multiplex PCR and of them 49 had multiple Candida species. All 43 colonized specimens were also positive by multiplex PCR. C. albicans was the most predominant organism (75/85) followed by C. parapsilosis (47/85), C. tropicalis (17/85) and C. glabrata (6/85). In specimens with multiple species, the two most common organisms were C. albicans and C. parapsilosis. Multiplex PCR yielded a sensitivity of 10 Candida cells/ml of oral rinse sample. CONCLUSIONS Multiplex PCR is found to be rapid, sensitive and specific than phenotypic identification methods in discriminating multiple Candida species in oral rinse specimens.
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Affiliation(s)
- Asanga Sampath
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Manjula Weerasekera
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Chinthika Gunasekara
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Ayomi Dilhari
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
| | - Uditha Bulugahapitiya
- Diabetes and Endocrinology Unit, Colombo South Teaching Hospital, Dehiwala, Sri Lanka
| | - Neluka Fernando
- Department of Microbiology, Faculty of Medical Sciences, University of Sri Jayewardenepura, Nugegoda, Sri Lanka
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Evaluating the Impact of DNA Extraction Method on the Representation of Human Oral Bacterial and Fungal Communities. PLoS One 2017; 12:e0169877. [PMID: 28099455 PMCID: PMC5242530 DOI: 10.1371/journal.pone.0169877] [Citation(s) in RCA: 92] [Impact Index Per Article: 13.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Accepted: 12/23/2016] [Indexed: 11/19/2022] Open
Abstract
The application of high-throughput, next-generation sequencing technologies has greatly improved our understanding of the human oral microbiome. While deciphering this diverse microbial community using such approaches is more accurate than traditional culture-based methods, experimental bias introduced during critical steps such as DNA extraction may compromise the results obtained. Here, we systematically evaluate four commonly used microbial DNA extraction methods (MoBio PowerSoil® DNA Isolation Kit, QIAamp® DNA Mini Kit, Zymo Bacterial/Fungal DNA Mini PrepTM, phenol:chloroform-based DNA isolation) based on the following criteria: DNA quality and yield, and microbial community structure based on Illumina amplicon sequencing of the V3-V4 region of the 16S rRNA gene of bacteria and the internal transcribed spacer (ITS) 1 region of fungi. Our results indicate that DNA quality and yield varied significantly with DNA extraction method. Representation of bacterial genera in plaque and saliva samples did not significantly differ across DNA extraction methods and DNA extraction method showed no effect on the recovery of fungal genera from plaque. By contrast, fungal diversity from saliva was affected by DNA extraction method, suggesting that not all protocols are suitable to study the salivary mycobiome.
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Kaczor-Urbanowicz KE, Martin Carreras-Presas C, Aro K, Tu M, Garcia-Godoy F, Wong DT. Saliva diagnostics - Current views and directions. Exp Biol Med (Maywood) 2016; 242:459-472. [PMID: 27903834 DOI: 10.1177/1535370216681550] [Citation(s) in RCA: 238] [Impact Index Per Article: 29.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
In this review, we provide an update on the current and future applications of saliva for diagnostic purposes. There are many advantages of using saliva as a biofluid. Its collection is fast, easy, inexpensive, and non-invasive. In addition, saliva, as a "mirror of the body," can reflect the physiological and pathological state of the body. Therefore, it serves as a diagnostic and monitoring tool in many fields of science such as medicine, dentistry, and pharmacotherapy. Introduced in 2008, the term "Salivaomics" aimed to highlight the rapid development of knowledge about various "omics" constituents of saliva, including: proteome, transcriptome, micro-RNA, metabolome, and microbiome. In the last few years, researchers have developed new technologies and validated a wide range of salivary biomarkers that will soon make the use of saliva a clinical reality. However, a great need still exists for convenient and accurate point-of-care devices that can serve as a non-invasive diagnostic tool. In addition, there is an urgent need to decipher the scientific rationale and mechanisms that convey systemic diseases to saliva. Another promising technology called liquid biopsy enables detection of circulating tumor cells (CTCs) and fragments of tumor DNA in saliva, thus enabling non-invasive early detection of various cancers. The newly developed technology-electric field-induced release and measurement (EFIRM) provides near perfect detection of actionable mutations in lung cancer patients. These recent advances widened the salivary diagnostic approach from the oral cavity to the whole physiological system, and thus point towards a promising future of salivary diagnostics for personalized individual medicine applications including clinical decisions and post-treatment outcome predictions. Impact statement The purpose of this mini-review is to make an update about the present and future applications of saliva as a diagnostic biofluid in many fields of science such as dentistry, medicine and pharmacotherapy. Using saliva as a fluid for diagnostic purposes would be a huge breakthrough for both patients and healthcare providers since saliva collection is easy, non-invasive and inexpensive. We will go through the current main diagnostic applications of saliva, and provide a highlight on the emerging, newly developing technologies and tools for cancer screening, detection and monitoring.
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Affiliation(s)
| | | | - Katri Aro
- 1 School of Dentistry, Center for Oral/Head & Neck Oncology Research, University of California at Los Angeles, Los Angeles, CA 90095, USA
| | - Michael Tu
- 1 School of Dentistry, Center for Oral/Head & Neck Oncology Research, University of California at Los Angeles, Los Angeles, CA 90095, USA
| | - Franklin Garcia-Godoy
- 3 College of Dentistry, University of Tennessee Health Science Center, Bioscience Research Center, Memphis, TN 38163, USA
| | - David Tw Wong
- 1 School of Dentistry, Center for Oral/Head & Neck Oncology Research, University of California at Los Angeles, Los Angeles, CA 90095, USA
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12
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Weerasekera MM, Wijesinghe GK, Jayarathna TA, Gunasekara CP, Fernando N, Kottegoda N, Samaranayake LP. Culture media profoundly affect Candida albicans and Candida tropicalis growth, adhesion and biofilm development. Mem Inst Oswaldo Cruz 2016; 111:697-702. [PMID: 27706381 PMCID: PMC5125054 DOI: 10.1590/0074-02760160294] [Citation(s) in RCA: 62] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2016] [Accepted: 07/25/2016] [Indexed: 01/09/2023] Open
Abstract
As there are sparse data on the impact of growth media on the phenomenon of biofilm
development for Candida we evaluated the efficacy of three culture
media on growth, adhesion and biofilm formation of two pathogenic yeasts,
Candida albicans and Candida tropicalis. The
planktonic phase yeast growth, either as monocultures or mixed cultures, in sabouraud
dextrose broth (SDB), yeast nitrogen base (YNB), and RPMI 1640 was compared, and
adhesion as well as biofilm formation were monitored using MTT and crystal violet
(CV) assays and scanning electron microscopy. Planktonic cells of C.
albicans, C. tropicalis and their 1:1 co-culture showed
maximal growth in SDB. C. albicans/C. tropicalis adhesion was
significantly facilitated in RPMI 1640 although the YNB elicited the maximum growth
for C. tropicalis. Similarly, the biofilm growth was uniformly
higher for both species in RPMI 1640, and C. tropicalis was the
slower biofilm former in all three media. Scanning electron microscopy images tended
to confirm the results of MTT and CV assay. Taken together, our data indicate that
researchers should pay heed to the choice of laboratory culture media when comparing
relative planktonic/biofilm growth of Candida. There is also a need
for standardisation of biofilm development media so as to facilitate cross
comparisons between laboratories.
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Affiliation(s)
- Manjula M Weerasekera
- University of Sri Jayewardenepura, Faculty of Medical Sciences, Department of Microbiology, Nugegoda, Gangodawila, Sri Lanka.,University of Sri Jayewardenepura, Center for Advanced Material Research, Nugegoda, Sri Lanka
| | - Gayan K Wijesinghe
- University of Sri Jayewardenepura, Faculty of Medical Sciences, Department of Microbiology, Nugegoda, Gangodawila, Sri Lanka
| | - Thilini A Jayarathna
- University of Sri Jayewardenepura, Faculty of Medical Sciences, Department of Microbiology, Nugegoda, Gangodawila, Sri Lanka
| | - Chinthika P Gunasekara
- University of Sri Jayewardenepura, Faculty of Medical Sciences, Department of Microbiology, Nugegoda, Gangodawila, Sri Lanka
| | - Neluka Fernando
- University of Sri Jayewardenepura, Faculty of Medical Sciences, Department of Microbiology, Nugegoda, Gangodawila, Sri Lanka
| | - Nilwala Kottegoda
- University of Sri Jayewardenepura, Faculty of Applied Sciences, Department of Chemistry, Nugegoda, Sri Lanka.,Sri Lanka Institute of Nanotechnology, Nanoscience and Technology Park, Pitipana, Homagama, Sri Lanka.,University of Sri Jayewardenepura, Center for Advanced Material Research, Nugegoda, Sri Lanka
| | - Lakshman P Samaranayake
- University of Queensland, Department of Oral Microbiomics and Infection, Brisbane, Australia
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Increased Digestive Proteases and Decreased β-Glucuronidase in Feces of Rats Treated with Sucralose and Saccharin-Another Critical Evidence That These Dietary Chemicals May Be Important Causative Factors for Inflammatory Bowel Disease. Inflamm Bowel Dis 2016; 22:E29-30. [PMID: 27416049 DOI: 10.1097/mib.0000000000000859] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/09/2022]
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Yildirim H, Sunay FB, Sinan S, Köçkar F. In vivo effects of curcumin on the paraoxonase, carbonic anhydrase, glucose-6-phosphate dehydrogenase and β-glucosidase enzyme activities in dextran sulphate sodium-induced ulcerative colitis mice. J Enzyme Inhib Med Chem 2016; 31:1583-90. [DOI: 10.3109/14756366.2016.1158173] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Affiliation(s)
- Hatice Yildirim
- Department of Molecular Biology and Genetics, Faculty of Science and Literature, Balikesir University, Balikesir, Turkey and
| | - Fatma Bahar Sunay
- Department of Histology & Embryology, Medical Faculty, Balikesir University, Balikesir, Turkey
| | - Selma Sinan
- Department of Molecular Biology and Genetics, Faculty of Science and Literature, Balikesir University, Balikesir, Turkey and
| | - Feray Köçkar
- Department of Molecular Biology and Genetics, Faculty of Science and Literature, Balikesir University, Balikesir, Turkey and
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Mohammadi P, Hamidkhani A, Asgarani E. Comparative Analysis of Denaturing Gradient Gel Electrophoresis and Temporal Temperature Gradient Gel Electrophoresis Profiles as a Tool for the Differentiation of Candida Species. Jundishapur J Microbiol 2015; 8:e22249. [PMID: 26568801 PMCID: PMC4639945 DOI: 10.5812/jjm.22249] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2014] [Revised: 01/19/2015] [Accepted: 03/01/2015] [Indexed: 11/16/2022] Open
Abstract
Background: Candida species are usually opportunistic organisms that cause acute to chronic infections when conditions in the host are favorable. Accurate identification of Candida species is an essential pre-requisite for improved therapeutic strategy. Identification of Candida species by conventional methods is time-consuming with low sensitivity, yet molecular approaches have provided an alternative way for early diagnosis of invasive candidiasis. Denaturing gradient gel electrophoresis (DGGE) and temporal temperature gradient gel electrophoresis (TTGE) are polymerase chain reaction (PCR)-based approaches that are used for studying the community structure of microorganisms. By using these methods, simultaneous identification of multiple yeast species will be possible and reliable results will be obtained quickly. Objectives: In this study, DGGE and TTGE methods were set up and evaluated for the detection of different Candida species, and their results were compared. Materials and Methods: Five different Candida species were cultured on potato dextrose agar medium for 24 hours. Next, total DNA was extracted by the phenol-chloroform method. Two sets of primers, ITS3-GC/ITS4 and NL1-GC/LS2 were applied to amplify the desired regions. The amplified fragments were then used to analyze DGGE and TTGE profiles. Results: The results showed that NL1-GC/LS2 primer set could yield species-specific amplicons, which were well distinguished and allowed better species discrimination than that generated by the ITS3-GC/ITS4 primer set, in both DGGE and TTGE profiles. All five Candida species were discriminated by DGGE and TTGE using the NL1-GC/LS2 primer set. Conclusions: Comparison of DGGE and TTGE profiles obtained from NL1-GC/LS2 amplicons exhibited the same patterns. Although both DGGE and TTGE techniques are capable of detecting Candida species, TTGE is recommended because of easier performance and lower costs.
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Affiliation(s)
- Parisa Mohammadi
- Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, IR Iran
- Corresponding author: Parisa Mohammadi, Department of Microbiology, Faculty of Biological Sciences, Alzahra University, Tehran, IR Iran. Tel: +98-2185692714, Fax: +98-2188058912, E-mail:
| | - Aida Hamidkhani
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, IR Iran
| | - Ezat Asgarani
- Department of Biotechnology, Faculty of Biological Sciences, Alzahra University, Tehran, IR Iran
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Abstract
In the last half-decade or so, interest in the bacterial part of the human microbiome and its role in maintaining health have received considerable attention. Since 2009, over 300 publications have appeared describing the oral bacterial microbiome. Strikingly, fungi in the oral cavity have been studied exclusively in relation to pathologies. However, little to nothing is known about a role of fungi in establishing and maintaining a healthy oral ecology. In a healthy ecology, balance is maintained by the combined positive and negative influences between and among its members. Interactions between fungi and bacteria occur primarily at a physical and chemical level. Physical interactions are represented by (co-)adhesion and repulsion (exclusion), while chemical interactions include metabolic dependencies, quorum-sensing, and the production of antimicrobial agents. Information obtained from oral model systems and also from studies on the role of fungi in gastro-intestinal ecology indicates that fungi influence bacterial behavior through these different interactions. This review describes our current knowledge of the interactions between fungi and bacteria and aims to illustrate that further research is required to establish the role of fungi in maintaining a healthy oral cavity.
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Affiliation(s)
- B.P. Krom
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Free University Amsterdam, Amsterdam, The Netherlands
| | - S. Kidwai
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Free University Amsterdam, Amsterdam, The Netherlands
| | - J.M. ten Cate
- Department of Preventive Dentistry, Academic Centre for Dentistry Amsterdam (ACTA), University of Amsterdam and Free University Amsterdam, Amsterdam, The Netherlands
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