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Pinheiro BG, Hahn RC, de Camargo ZP, Rodrigues AM. Molecular Tools for Detection and Identification of Paracoccidioides Species: Current Status and Future Perspectives. J Fungi (Basel) 2020; 6:E293. [PMID: 33217898 PMCID: PMC7711936 DOI: 10.3390/jof6040293] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2020] [Revised: 11/01/2020] [Accepted: 11/05/2020] [Indexed: 12/14/2022] Open
Abstract
Paracoccidioidomycosis (PCM) is a mycotic disease caused by the Paracoccidioides species, a group of thermally dimorphic fungi that grow in mycelial form at 25 °C and as budding yeasts when cultured at 37 °C or when parasitizing the host tissues. PCM occurs in a large area of Latin America, and the most critical regions of endemicity are in Brazil, Colombia, and Venezuela. The clinical diagnosis of PCM needs to be confirmed through laboratory tests. Although classical laboratory techniques provide valuable information due to the presence of pathognomonic forms of Paracoccidioides spp., nucleic acid-based diagnostics gradually are replacing or complementing culture-based, biochemical, and immunological assays in routine microbiology laboratory practice. Recently, taxonomic changes driven by whole-genomic sequencing of Paracoccidioides have highlighted the need to recognize species boundaries, which could better ascertain Paracoccidioides taxonomy. In this scenario, classical laboratory techniques do not have significant discriminatory power over cryptic agents. On the other hand, several PCR-based methods can detect polymorphisms in Paracoccidioides DNA and thus support species identification. This review is focused on the recent achievements in molecular diagnostics of paracoccidioidomycosis, including the main advantages and pitfalls related to each technique. We discuss these breakthroughs in light of taxonomic changes in the Paracoccidioides genus.
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Affiliation(s)
- Breno Gonçalves Pinheiro
- Laboratory of Emerging Fungal Pathogens, Department of Microbiology, Immunology, and Parasitology, Discipline of Cellular Biology, Federal University of São Paulo (UNIFESP), São Paulo 04023062, Brazil; (B.G.P.); (Z.P.d.C.)
| | - Rosane Christine Hahn
- Laboratory of Mycology/Research, Faculty of Medicine, Federal University of Mato Grosso, Cuiabá, Mato Grosso 78060900, Brazil;
- Federal University of Mato Grosso, Júlio Muller University Hospital, Mato Grosso 78048902, Brazil
| | - Zoilo Pires de Camargo
- Laboratory of Emerging Fungal Pathogens, Department of Microbiology, Immunology, and Parasitology, Discipline of Cellular Biology, Federal University of São Paulo (UNIFESP), São Paulo 04023062, Brazil; (B.G.P.); (Z.P.d.C.)
- Department of Medicine, Discipline of infectious Diseases, Federal University of São Paulo (UNIFESP), São Paulo 04023062, Brazil
| | - Anderson Messias Rodrigues
- Laboratory of Emerging Fungal Pathogens, Department of Microbiology, Immunology, and Parasitology, Discipline of Cellular Biology, Federal University of São Paulo (UNIFESP), São Paulo 04023062, Brazil; (B.G.P.); (Z.P.d.C.)
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Castilho DG, Chaves AFA, Xander P, Zelanis A, Kitano ES, Serrano SMT, Tashima AK, Batista WL. Exploring Potential Virulence Regulators in Paracoccidioides brasiliensis Isolates of Varying Virulence through Quantitative Proteomics. J Proteome Res 2014; 13:4259-71. [DOI: 10.1021/pr5002274] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Affiliation(s)
- Daniele G. Castilho
- Departamento
de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Mirassol, 207, São Paulo, 04044-010 SP, Brazil
| | - Alison F. A. Chaves
- Departamento
de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Mirassol, 207, São Paulo, 04044-010 SP, Brazil
| | - Patricia Xander
- Departamento
de Ciências Biológicas, Universidade Federal de São Paulo, Campus Diadema, Rua São Nicolau, 210, Diadema, 09913-030 SP, Brazil
| | - André Zelanis
- Instituto
de Ciência e Tecnologia, Universidade Federal de São Paulo, Campus São José dos Campos, Rua Talim, 330, São José dos Campos, 12231-280 SP, Brazil
| | - Eduardo S. Kitano
- Laboratório
Especial de Toxinologia Aplicada − CeTICS, Instituto Butantan, Av. Vital Brasil 1500, São Paulo, 05503-900 SP, Brazil
| | - Solange M. T. Serrano
- Laboratório
Especial de Toxinologia Aplicada − CeTICS, Instituto Butantan, Av. Vital Brasil 1500, São Paulo, 05503-900 SP, Brazil
| | - Alexandre K. Tashima
- Departamento
de Bioquímica, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua 3 de maio, 100 - Vila Clementino, São
Paulo, 04023-062 SP, Brazil
| | - Wagner L. Batista
- Departamento
de Microbiologia, Imunologia e Parasitologia, Escola Paulista de Medicina, Universidade Federal de São Paulo, Rua Mirassol, 207, São Paulo, 04044-010 SP, Brazil
- Departamento
de Ciências Biológicas, Universidade Federal de São Paulo, Campus Diadema, Rua São Nicolau, 210, Diadema, 09913-030 SP, Brazil
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Kioshima ES, Aliperti F, Maricato JT, Mortara RA, Bagagli E, Mariano M, Lopes JD. A synthetic peptide selectively kills only virulent Paracoccidioides brasiliensis yeasts. Microbes Infect 2010; 13:251-60. [PMID: 21070862 DOI: 10.1016/j.micinf.2010.10.019] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2010] [Revised: 10/24/2010] [Accepted: 10/26/2010] [Indexed: 10/18/2022]
Abstract
This work was conducted to identify virulence biomarkers for Paracoccidioides brasiliensis (Pb), the fungus responsible for Paracoccidioidomycosis (PCM), a systemic disease endemic in Latin America. Measurement of mortality showed that all B10.A mice were killed after 250 days by the virulent Pb18 isolate while only one of the mice that received the attenuated counterpart died. Also, number of lung CFUs from virulent Pb18 inoculated mice were much higher when these isolates were compared. Phage display methodology allowed selection of three phages that specifically bound to virulent Pb18. Variability of p04 phage binding to different Pb isolates were examples of variability of expression by the fungus of its binding molecule, strongly suggesting p04 as a biomarker of virulence. In vitro, its derived peptide pep04 killed only virulent fungi, and confocal microscopy showed that it was internalized only by the virulent isolate. Pep04 blocked establishment of Pb infection in mice and virulent Pb18 pre-incubated with p04 showed significantly inhibited lung infection. Furthermore, infected mice treated with p04 showed highly significant reduction in lung CFUs. These findings firmly establish p04 as a biomarker of Pb virulence. Therefore, after proper peptide engineering, p04 may become a useful adjuvant for the distressing treatment of PCM.
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Affiliation(s)
- Erika Seki Kioshima
- Department of Microbiology, Immunology and Parasitology, Universidade Federal de São Paulo, São Paulo, SP, Brazil
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Batista Júnior J, Berzaghi R, Arnaud ADMDM, Fontes CJF, de Camargo ZP, Hahn RC. Simultaneous infection of human host with genetically distinct isolates of Paracoccidioides brasiliensis. Mem Inst Oswaldo Cruz 2010; 105:62-5. [PMID: 20209331 DOI: 10.1590/s0074-02762010000100009] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2009] [Accepted: 09/19/2009] [Indexed: 11/22/2022] Open
Abstract
This study is the first report on genetic differences between isolates of Paracoccidioides brasiliensis from a single patient. We describe a simultaneous infection with genetically distinct isolates of P. brasiliensis in a patient with chronic paracoccidioidomycosis. The clinical isolates were obtained from lesions in different anatomical sites and were characterised by random amplified polymorphic DNA (RAPD) analysis. The RAPD technique can be helpful for distinguishing between clinical isolates. Different random primers were used to characterise these clinical isolates. The RAPD patterns allowed for differentiation between isolates and the construction of a phenetic tree, which showed more than 28% genetic variability in this fungal species, opening new possibilities for clinical studies of P. brasiliensis. Based on these results and preliminary clinical findings, we suggest that different genotypes of P. brasiliensis might infect the same patient, inducing the active form of the disease.
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Affiliation(s)
- João Batista Júnior
- Laboratório de Micologia, Faculdade de Ciências Médicas, Universidade Federal de Mato Grosso, Cuiabá, MT, Brasil
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Costa PF, Fernandes GF, dos Santos PO, Amaral CC, Camargo ZP. Characteristics of environmental Paracoccidioides brasiliensis isolates. Mycopathologia 2010; 169:37-46. [PMID: 19653119 DOI: 10.1007/s11046-009-9228-2] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2009] [Accepted: 07/16/2009] [Indexed: 11/30/2022]
Abstract
The ecological niche or exact habitat of the fungus Paracoccidioides brasiliensis is not known, and few isolates have been obtained from the environment. In this study, ten isolates were analyzed with respect to antigenic composition, serology, pathogenicity, and molecular aspects. Gp43 is considered to be the molecular basis for the serodiagnosis of paracoccidioidomycosis; however, in this study only six of the environmental isolates secreted this molecule (four in great amounts and two in small amounts). Other molecules were also produced. When exoantigens from these isolates were tested using immunodiffusion, only four preparations were positive by ID tests. However, when these exoantigens were tested by ELISA, all of them except one were able to detect anti-P. brasiliensis antibodies. In Western blot assays, these exoantigens showed different reactivities. Isolates that secreted gp43 presented positive reactions for this molecule, and isolates that did not secrete gp43 gave positive reactions for other minor molecules. RAPD analysis revealed that there is great genetic variation between these environmental isolates. These isolates were non-pathogenic: no mortality was observed among the inoculated mice during an 18-month follow-up period.
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Marini MM, Zanforlin T, Santos PC, Barros RRM, Guerra ACP, Puccia R, Felipe MSS, Brigido M, Soares CMA, Ruiz JC, Silveira JF, Cisalpino PS. Identification and characterization of Tc1/mariner-like DNA transposons in genomes of the pathogenic fungi of the Paracoccidioides species complex. BMC Genomics 2010; 11:130. [PMID: 20178623 PMCID: PMC2836289 DOI: 10.1186/1471-2164-11-130] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2009] [Accepted: 02/23/2010] [Indexed: 12/18/2022] Open
Abstract
Background Paracoccidioides brasiliensis (Eukaryota, Fungi, Ascomycota) is a thermodimorphic fungus, the etiological agent of paracoccidioidomycosis, the most important systemic mycoses in Latin America. Three isolates corresponding to distinct phylogenetic lineages of the Paracoccidioides species complex had their genomes sequenced. In this study the identification and characterization of class II transposable elements in the genomes of these fungi was carried out. Results A genomic survey for DNA transposons in the sequence assemblies of Paracoccidioides, a genus recently proposed to encompass species P. brasiliensis (harboring phylogenetic lineages S1, PS2, PS3) and P. lutzii (Pb01-like isolates), has been completed. Eight new Tc1/mariner families, referred to as Trem (Transposable element mariner), labeled A through H were identified. Elements from each family have 65-80% sequence similarity with other Tc1/mariner elements. They are flanked by 2-bp TA target site duplications and different termini. Encoded DDD-transposases, some of which have complete ORFs, indicated that they could be functionally active. The distribution of Trem elements varied between the genomic sequences characterized as belonging to P. brasiliensis (S1 and PS2) and P. lutzii. TremC and H elements would have been present in a hypothetical ancestor common to P. brasiliensis and P. lutzii, while TremA, B and F elements were either acquired by P. brasiliensis or lost by P. lutzii after speciation. Although TremD and TremE share about 70% similarity, they are specific to P. brasiliensis and P. lutzii, respectively. This suggests that these elements could either have been present in a hypothetical common ancestor and have evolved divergently after the split between P. brasiliensis and P. Lutzii, or have been independently acquired by horizontal transfer. Conclusions New families of Tc1/mariner DNA transposons in the genomic assemblies of the Paracoccidioides species complex are described. Families were distinguished based on significant BLAST identities between transposases and/or TIRs. The expansion of Trem in a putative ancestor common to the species P. brasiliensis and P. lutzii would have given origin to TremC and TremH, while other elements could have been acquired or lost after speciation had occurred. The results may contribute to our understanding of the organization and architecture of genomes in the genus Paracoccidioides.
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Affiliation(s)
- Marjorie M Marini
- Departamento de Microbiologia, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, 31270-901 Belo Horizonte, MG, Brazil
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Correia J, de Moraes Borba C, Reis B, Martins A, Unkles S, Kinghorn JR, Lucena-Silva N. The ceja-1 sequence as a potential new molecular marker for Paracoccidioides brasiliensis infection. Mycoses 2009; 53:130-7. [PMID: 19389074 DOI: 10.1111/j.1439-0507.2008.01682.x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
We have developed a two-step PCR assay that amplifies a region of the ceja-1 sequence that is specific for virulent strains of Paracoccidioides brasiliensis. An internal region of the ceja-1 sequence was chosen for designing primers that were utilised in a single tube heminested PCR protocol to amplify DNA from six virulent strains. PCR specificity was determined by the absence of amplified products with genomic DNA from four non-virulent strains of P. brasiliensis and from eight fungal pathogens, one bacterium, two protozoa, one worm and mouse and human genomic DNA (leucocytes). The fact that the PCR product was only obtained with the genetic material from virulent isolates of P. brasiliensis suggested that this partial amplified sequence might be a marker of virulence for this fungus. The diagnostic potential of this PCR was confirmed by the successful amplification of this fragment with genomic DNA obtained in lymph node aspirate from a patient with paracoccidioidomycosis.
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Affiliation(s)
- Janaina Correia
- Department of Immunology, Aggeu Magalhães Research Center, FIOCRUZ, Recife, PE, Brazil
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Abstract
Paracoccidioides brasiliensis is a temperature-dependent dimorphic fungus and the agent of paracoccidioidomycosis (PCM), which is prevalent in rural workers of Latin American countries. Until a decade ago, most of the studies involving P. brasiliensis used clinical isolates, since environmental samples from soil are difficult to obtain. More recently, P. brasiliensis has been isolated from infected wild and domestic animals, especially from the nine-banded armadillo Dasypus novemcinctus in Brazil. Over the years, diversity within the species has been observed at several phenotypic levels. The present review will discuss the reports focusing on genetic polymorphism, which culminated with the detection of P. brasiliensis phylogenetic species as a result of a multilocus study. Polymorphism in the PbGP43 gene is detailed. This gene encodes fungal glycoprotein gp43, a dominant P. brasiliensis antigen largely studied in the last two decades for its importance in diagnosis, immune protection, and adhesive properties to extracellular matrix-associated proteins. Fungal traits associated with genetic groups are discussed.
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Andreotti PF, Monteiro da Silva JL, Teixeira EC, Bertolini MC, Soares CP, Benard G, Mendes-Giannini MJS. Identification of a gene encoding adaptin-like protein in the Paracoccidioides brasiliensis genome by random amplified polymorphic DNA analysis. J Med Microbiol 2007; 56:884-887. [PMID: 17577051 DOI: 10.1099/jmm.0.47127-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Paracoccidioides brasiliensis isolates are not homogeneous in their patterns of pathogenicity in animals and adhesion to epithelial cells. During this investigation, genotypic differences were observed between two samples of P. brasiliensis strain 18 yeast phase (Pb18) previously cultured many times, one taken before (Pb18a) and the other after (Pb18b) animal inoculation. Random amplified polymorphic DNA analysis using the primer OPJ4 distinguished Pb18b from Pb18a by one 308 bp DNA fragment, which after cloning and sequencing was shown to encode a polypeptide sequence homologous to the protein beta-adaptin. It is suggested, by comparison to other micro-organisms, that this protein might play an important role in the virulence of P. brasiliensis. This result demonstrates the influence of in vitro subculturing on the genotype of this organism.
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Affiliation(s)
| | | | - Elaine Cristina Teixeira
- Departamento de Bioquímica e Tecnologia Química, Instituto de Química, UNESP, Araraquara, SP, Brazil
| | - Maria Célia Bertolini
- Departamento de Bioquímica e Tecnologia Química, Instituto de Química, UNESP, Araraquara, SP, Brazil
| | - Christiane Pienna Soares
- Departamento de Análises Clínicas, Faculdade de Ciências Farmacêuticas, UNESP, Araraquara, SP, Brazil
| | - Gil Benard
- Laboratório de Dermatologia e Imunodeficiências, Departamento de Dermatologia, Faculdade de Medicina, Universidade de São Paulo, Brazil
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Kurokawa CS, Lopes CR, Sugizaki MF, Kuramae EE, Franco MF, Peraçoli MTS. Virulence profile of ten Paracoccidioides brasiliensis isolates: association with morphologic and genetic patterns. Rev Inst Med Trop Sao Paulo 2005; 47:257-62. [PMID: 16302108 DOI: 10.1590/s0036-46652005000500004] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Ten isolates of Paracoccidioides brasiliensis were examined for differences in virulence in outbred mice intravenously inoculated with the fungus, associated with mycelial morphology, and genetic patterns measured by random amplified polymorphic DNA (RAPD). Virulence was evaluated by viable yeast cell recovery from lungs and demonstration of histopathologic lesions in different organs. The results showed that the isolates presented four virulence degrees: high virulence, intermediate, low and non-virulence. RAPD clustered the isolates studied in two main groups with 56% of genetic similarity. Strains with low virulence, Pb265 or the non-virulent, Pb192, showed glabrous/cerebriform morphology and high genetic similarity (98.7%) when compared to the other isolates studied. The same was observed with Bt79 and Bt83 that shared 96% genetic similarity, cottony colonies and high virulence. The RAPD technique could only discriminate P. brasiliensis isolates according to glabrous/cerebriform or cottony colonies, and also high from low virulence strains. Isolates with intermediate virulence such as Pb18, Pb18B6, Bt32 and Bt56 showed variability in their similarity coefficient suggesting that RAPD was able to detect genetic variability in this fungal specie. Virulence profile of P. brasiliensis demonstrated that both mycelial morphologic extreme phenotypes may be associated with fungal virulence and their in vitro subculture time. Thus, RAPD technique analysis employed in association with virulence, morphologic and immunologic aspects might prove adequate to detect differences between P. brasiliensis isolates.
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Affiliation(s)
- Cilmery S Kurokawa
- Departamento de Pediatria, Faculdade de Medicina, UNESP, Botucatu, São Paulo, SP, Brazil.
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San-Blas G, Niño-Vega G, Barreto L, Hebeler-Barbosa F, Bagagli E, Olivero de Briceño R, Mendes RP. Primers for clinical detection of Paracoccidioides brasiliensis. J Clin Microbiol 2005; 43:4255-7. [PMID: 16081993 PMCID: PMC1233942 DOI: 10.1128/jcm.43.8.4255-4257.2005] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
From a 0.72-kb fragment universally generated in Paracoccidioides brasiliensis strains, primers were designed and tested on genomic DNA of this and other pathogenic fungi. They were specific and highly sensitive for P. brasiliensis DNA. Positive results were obtained when these were tested in clinical samples.
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Affiliation(s)
- Gioconda San-Blas
- Instituto Venezolano de Investigaciones Científicas, Centro de Microbiología y Biología Celular, Apartado 21827, Caracas 1020A, Venezuela.
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Nascimento E, Martinez R, Lopes AR, de Souza Bernardes LA, Barco CP, Goldman MHS, Taylor JW, McEwen JG, Nobrega MP, Nobrega FG, Goldman GH. Detection and selection of microsatellites in the genome of Paracoccidioides brasiliensis as molecular markers for clinical and epidemiological studies. J Clin Microbiol 2005; 42:5007-14. [PMID: 15528688 PMCID: PMC525212 DOI: 10.1128/jcm.42.11.5007-5014.2004] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Paracoccidioides brasiliensis, a thermodimorphic fungus, is the causative agent of the prevalent systemic mycosis in Latin America, paracoccidioidomycosis (PCM). Here, we describe the microsatellite patterns observed in a collection of P. brasiliensis random sequence tags. We identified 1,117 microsatellite patterns in about 3.8 Mb of unique sequences (0.47% of the total DNA used in the analysis). The majority of these microsatellites (87.5%) are found in noncoding sequences. We used two polymorphic microsatellites located on noncoding and coding sequences, as well as two microsatellites located on introns, as molecular markers to discriminate P. brasiliensis isolates, to look for relationships between the genetic background of the strains and the types of human disease they cause. We did not observe any correlation between the clinical form of human PCM and four simple sequence repeat patterns analyzed.
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Affiliation(s)
- Erika Nascimento
- Departamento de Ciências Farmacêuticas de Ribeirão Preto, Universidade de São Paulo, Brazil
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Hahn RC, Macedo AM, Fontes CJF, Batista RD, Santos NL, Hamdan JS. Randomly amplified polymorphic DNA as a valuable tool for epidemiological studies of Paracoccidioides brasiliensis. J Clin Microbiol 2003; 41:2849-54. [PMID: 12843011 PMCID: PMC165335 DOI: 10.1128/jcm.41.7.2849-2854.2003] [Citation(s) in RCA: 40] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Randomly amplified polymorphic DNA (RAPD) has been successfully used to detect genetic variations among isolates of Paracoccidioides brasiliensis. However, the usefulness of this technique for assessing important parasitic properties is still unconfirmed. In the present work we further investigated the applicability of RAPD in revealing important intrinsic and extrinsic features of this fungus associated with geographical origin, time of isolation, source of clinical specimen, clinical forms of human disease and also in vitro and in vivo susceptibility to antimicrobial and antifungal drugs. The RAPD patterns allowed us to distinguish all of the analyzed strains, which included 26 clinical isolates, 2 animal isolates, and 1 environmental isolate of P. brasiliensis obtained from different geographic regions, confirming the strong discriminating power of this technique. A phenetic tree, build from the RAPD data, showed that although the two nonclinical Brazilian strains were set together the majority of the clinical Brazilian strains were randomly distributed through different sub-branches of a major cluster without any correlation to any of the parameters analyzed. A second major cluster, however, has grouped isolates from Mato Grosso and Roraima (Brazil) that not only were susceptible in vitro to trimethoprim-sulfamethoxazole but also produced a good in vivo response. These results open new vistas for epidemiological and clinical studies of P. brasiliensis.
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Affiliation(s)
- Rosane Christine Hahn
- Departamento de Microbiologia, Instituto de Ciências Biológicas Universidade Federal de Minas Gerais Belo Horizonte, Brazil
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Current awareness on yeast. Yeast 2002; 19:1373-80. [PMID: 12526113 DOI: 10.1002/yea.830] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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