1
|
Pereira LOR, Sousa CS, Ramos HCP, Torres-Santos EC, Pinheiro LS, Alves MR, Cuervo P, Romero GAS, Boité MC, Porrozzi R, Cupolillo E. Insights from Leishmania (Viannia) guyanensis in vitro behavior and intercellular communication. Parasit Vectors 2021; 14:556. [PMID: 34711290 PMCID: PMC8554959 DOI: 10.1186/s13071-021-05057-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2020] [Accepted: 08/12/2021] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Pentavalent antimonial-based chemotherapy is the first-line approach for leishmaniasis treatment and disease control. Nevertheless antimony-resistant parasites have been reported in some endemic regions. Treatment refractoriness is complex and is associated with patient- and parasite-related variables. Although amastigotes are the parasite stage in the vertebrate host and, thus, exposed to the drug, the stress caused by trivalent antimony in promastigotes has been shown to promote significant modification in expression of several genes involved in various biological processes, which will ultimately affect parasite behavior. Leishmania (Viannia) guyanensis is one of the main etiological agents in the Amazon Basin region, with a high relapse rate (approximately 25%). METHODS Herein, we conducted several in vitro analyses with L. (V.) guyanensis strains derived from cured and refractory patients after treatment with standardized antimonial therapeutic schemes, in addition to a drug-resistant in vitro-selected strain. Drug sensitivity assessed through Sb(III) half-maximal inhibitory concentration (IC50) assays, growth patterns (with and without drug pressure) and metacyclic-like percentages were determined for all strains and compared to treatment outcomes. Finally, co-cultivation without intercellular contact was followed by parasitic density and Sb(III) IC50 measurements. RESULTS Poor treatment response was correlated with increased Sb(III) IC50 values. The decrease in drug sensitivity was associated with a reduced cell replication rate, increased in vitro growth ability, and higher metacyclic-like proportion. Additionally, in vitro co-cultivation assays demonstrated that intercellular communication enabled lower drug sensitivity and enhanced in vitro growth ability, regardless of direct cell contact. CONCLUSIONS Data concerning drug sensitivity in the Viannia subgenus are emerging, and L. (V.) guyanensis plays a pivotal epidemiological role in Latin America. Therefore, investigating the parasitic features potentially related to relapses is urgent. Altogether, the data presented here indicate that all tested strains of L. (V.) guyanensis displayed an association between treatment outcome and in vitro parameters, especially the drug sensitivity. Remarkably, sharing enhanced growth ability and decreased drug sensitivity, without intercellular communication, were demonstrated.
Collapse
Affiliation(s)
- Luiza O R Pereira
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil.
| | - Cíntia S Sousa
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
| | - Hellen C P Ramos
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
| | | | - Liliane S Pinheiro
- Laboratório de Bioquímica de Tripanossomatídeos, IOC, FIOCRUZ, Rio de Janeiro, Brazil.,Instituto de Saúde e Biotecnologia, Universidade Federal do Amazonas, Campus Coari, Amazonas, Brazil
| | - Marcelo R Alves
- Laboratório de Pesquisa Clínica em DST-AIDS, Instituto Nacional de Infectologia Evandro Chagas, FIOCRUZ, Rio de Janeiro, Brazil
| | - Patricia Cuervo
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
| | | | - Mariana C Boité
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
| | - Renato Porrozzi
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
| | - Elisa Cupolillo
- Laboratório de Pesquisa em Leishmanioses, Instituto Oswaldo Cruz (IOC), Fundação Oswaldo Cruz (FIOCRUZ), Rio de Janeiro, Brazil
| |
Collapse
|
2
|
Schwabl P, Boité MC, Bussotti G, Jacobs A, Andersson B, Moreira O, Freitas-Mesquita AL, Meyer-Fernandes JR, Telleria EL, Traub-Csekö Y, Vaselek S, Leštinová T, Volf P, Morgado FN, Porrozzi R, Llewellyn M, Späth GF, Cupolillo E. Colonization and genetic diversification processes of Leishmania infantum in the Americas. Commun Biol 2021; 4:139. [PMID: 33514858 PMCID: PMC7846609 DOI: 10.1038/s42003-021-01658-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2020] [Accepted: 01/04/2021] [Indexed: 12/30/2022] Open
Abstract
Leishmania infantum causes visceral leishmaniasis, a deadly vector-borne disease introduced to the Americas during the colonial era. This non-native trypanosomatid parasite has since established widespread transmission cycles using alternative vectors, and human infection has become a significant concern to public health, especially in Brazil. A multi-kilobase deletion was recently detected in Brazilian L. infantum genomes and is suggested to reduce susceptibility to the anti-leishmanial drug miltefosine. We show that deletion-carrying strains occur in at least 15 Brazilian states and describe diversity patterns suggesting that these derive from common ancestral mutants rather than from recurrent independent mutation events. We also show that the deleted locus and associated enzymatic activity is restored by hybridization with non-deletion type strains. Genetic exchange appears common in areas of secondary contact but also among closely related parasites. We examine demographic and ecological scenarios underlying this complex L. infantum population structure and discuss implications for disease control. Philipp Schwabl, Mariana Boité, and colleagues analyze 126 Leishmania infantum genomes to determine how demographic and selective consequences of the parasite’s invasive history have contributed to intricate population genetic heterogeneity across Brazil. Their data suggest a complex interplay of population expansion, secondary contact and genetic exchange events underlying diversity patterns at short and long-distance scales. These processes also appear pivotal to the proliferation of a drug resistance-associated multi-gene deletion on chromosome 31.
Collapse
Affiliation(s)
- Philipp Schwabl
- School of Life Sciences, Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, G12 8QQ, Glasgow, UK
| | - Mariana C Boité
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, FIOCRUZ, 21040-365, Rio de Janeiro, Brazil.
| | - Giovanni Bussotti
- Institut Pasteur-Bioinformatics and Biostatistics Hub-C3BI, USR 3756 IP CNRS, 75015, Paris, France.,Department of Parasites and Insect Vectors, Institut Pasteur, INSERM U1201, Unité de Parasitology moléculaire et Signalisation, 75015, Paris, France
| | - Arne Jacobs
- School of Life Sciences, Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, G12 8QQ, Glasgow, UK
| | - Bjorn Andersson
- Department of Cell and Molecular Biology, Science for Life Laboratory, Karolinska Institutet, Biomedicum 9C, 171 77, Stockholm, Sweden
| | - Otacilio Moreira
- Laboratório de Biologia Molecular e Doenças Endêmicas, Instituto Oswaldo Cruz, Fiocruz, 21040-365, Rio de Janeiro, RJ, Brazil
| | - Anita L Freitas-Mesquita
- Instituto de Bioquímica Médica Leopoldo de Meis (IBqM), Universidade Federal do Rio de Janeiro (UFRJ), 21941-590, Rio de Janeiro, RJ, Brazil
| | - Jose Roberto Meyer-Fernandes
- Instituto de Bioquímica Médica Leopoldo de Meis (IBqM), Universidade Federal do Rio de Janeiro (UFRJ), 21941-590, Rio de Janeiro, RJ, Brazil
| | - Erich L Telleria
- Laboratório de Biologia Molecular de Parasitas e Vetores, Instituto Oswaldo Cruz, 21040-365, Rio de Janeiro, Brazil.,Faculty of Science, Department of Parasitology, Charles University, 128 44, Prague, Czech Republic
| | - Yara Traub-Csekö
- Laboratório de Biologia Molecular de Parasitas e Vetores, Instituto Oswaldo Cruz, 21040-365, Rio de Janeiro, Brazil
| | - Slavica Vaselek
- Faculty of Science, Department of Parasitology, Charles University, 128 44, Prague, Czech Republic
| | - Tereza Leštinová
- Faculty of Science, Department of Parasitology, Charles University, 128 44, Prague, Czech Republic
| | - Petr Volf
- Faculty of Science, Department of Parasitology, Charles University, 128 44, Prague, Czech Republic
| | - Fernanda N Morgado
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, FIOCRUZ, 21040-365, Rio de Janeiro, Brazil
| | - Renato Porrozzi
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, FIOCRUZ, 21040-365, Rio de Janeiro, Brazil
| | - Martin Llewellyn
- School of Life Sciences, Institute of Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, G12 8QQ, Glasgow, UK
| | - Gerald F Späth
- Department of Parasites and Insect Vectors, Institut Pasteur, INSERM U1201, Unité de Parasitology moléculaire et Signalisation, 75015, Paris, France
| | - Elisa Cupolillo
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, FIOCRUZ, 21040-365, Rio de Janeiro, Brazil
| |
Collapse
|
3
|
Boité MC, Späth GF, Bussotti G, Porrozzi R, Morgado FN, Llewellyn M, Schwabl P, Cupolillo E. Trans-Atlantic Spill Over: Deconstructing the Ecological Adaptation of Leishmania infantum in the Americas. Genes (Basel) 2019; 11:E4. [PMID: 31861501 PMCID: PMC7017240 DOI: 10.3390/genes11010004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2019] [Revised: 12/13/2019] [Accepted: 12/17/2019] [Indexed: 12/13/2022] Open
Abstract
Pathogen fitness landscapes change when transmission cycles establish in non-native environments or spill over into new vectors and hosts. The introduction of Leishmania infantum in the Americas into the Neotropics during European colonization represents a unique case study to investigate the mechanisms of ecological adaptation of this important parasite. Defining the evolutionary trajectories that drive L. infantum fitness in this new environment are of great public health importance as they will allow unique insight into pathways of host/pathogen co-evolution and their consequences for region-specific changes in disease manifestation. This review summarizes current knowledge on L. infantum genetic and phenotypic diversity in the Americas and its possible role in the unique epidemiology of visceral leishmaniasis (VL) in the New World. We highlight the importance of appreciating adaptive molecular mechanisms in L. infantum to understand the parasites' successful establishment on the continent.
Collapse
Affiliation(s)
- Mariana C. Boité
- Laboratory of Research on Leishmaniasis, Oswaldo Cruz Institute, FIOCRUZ, 21040-360 Rio de Janeiro, Brazil; (R.P.); (F.N.M.); (E.C.)
| | - Gerald F. Späth
- Department of Parasites and Insect Vectors, Laboratory of Molecular Parasitology and Signaling, Institut Pasteur, INSERN U1201, 75015 Paris, France; (G.F.S.); (G.B.)
| | - Giovanni Bussotti
- Department of Parasites and Insect Vectors, Laboratory of Molecular Parasitology and Signaling, Institut Pasteur, INSERN U1201, 75015 Paris, France; (G.F.S.); (G.B.)
- Institut Pasteur-Bioinformatics and Biostatistics Hub-C3BI, USR 3756 IP CNRS, 75015 Paris, France
| | - Renato Porrozzi
- Laboratory of Research on Leishmaniasis, Oswaldo Cruz Institute, FIOCRUZ, 21040-360 Rio de Janeiro, Brazil; (R.P.); (F.N.M.); (E.C.)
| | - Fernanda N. Morgado
- Laboratory of Research on Leishmaniasis, Oswaldo Cruz Institute, FIOCRUZ, 21040-360 Rio de Janeiro, Brazil; (R.P.); (F.N.M.); (E.C.)
| | - Martin Llewellyn
- Institute of Biodiversity, Animal Health & Comparative Medicine, University of Glasgow, G128QQ Glasgow, UK; (M.L.); (P.S.)
| | - Philipp Schwabl
- Institute of Biodiversity, Animal Health & Comparative Medicine, University of Glasgow, G128QQ Glasgow, UK; (M.L.); (P.S.)
| | - Elisa Cupolillo
- Laboratory of Research on Leishmaniasis, Oswaldo Cruz Institute, FIOCRUZ, 21040-360 Rio de Janeiro, Brazil; (R.P.); (F.N.M.); (E.C.)
| |
Collapse
|
4
|
Cavalcanti AS, Ribeiro-Alves M, Pereira LDOR, Mestre GL, Ferreira ABR, Morgado FN, Boité MC, Cupolillo E, Moraes MO, Porrozzi R. Parasite load induces progressive spleen architecture breakage and impairs cytokine mRNA expression in Leishmania infantum-naturally infected dogs. PLoS One 2015; 10:e0123009. [PMID: 25875101 PMCID: PMC4395300 DOI: 10.1371/journal.pone.0123009] [Citation(s) in RCA: 48] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 02/26/2015] [Indexed: 11/18/2022] Open
Abstract
Canine Visceral Leishmaniasis (CVL) shares many aspects with the human disease and dogs are considered the main urban reservoir of L. infantum in zoonotic VL. Infected dogs develop progressive disease with a large clinical spectrum. A complex balance between the parasite and the genetic/immunological background of the host are decisive for infection evolution and clinical outcome. This study comprised 92 Leishmania infected mongrel dogs of various ages from Mato Grosso, Brazil. Spleen samples were collected for determining parasite load, humoral response, cytokine mRNA expression and histopathology alterations. By real-time PCR for the ssrRNA Leishmania gene, two groups were defined; a low (lowP, n = 46) and a high parasite load groups (highP, n = 42). When comparing these groups, results show variable individual humoral immune response with higher specific IgG production in infected animals but with a notable difference in CVL rapid test optical densities (DPP) between highP and lowP groups. Splenic architecture disruption was characterized by disorganization of white pulp, more evident in animals with high parasitism. All cytokine transcripts in spleen were less expressed in highP than lowP groups with a large heterogeneous variation in response. Individual correlation analysis between cytokine expression and parasite load revealed a negative correlation for both pro-inflammatory cytokines: IFNγ, IL-12, IL-6; and anti-inflammatory cytokines: IL-10 and TGFβ. TNF showed the best negative correlation (r2 = 0.231; p<0.001). Herein we describe impairment on mRNA cytokine expression in leishmania infected dogs with high parasite load associated with a structural modification in the splenic lymphoid micro-architecture. We also discuss the possible mechanism responsible for the uncontrolled parasite growth and clinical outcome.
Collapse
Affiliation(s)
- Amanda S. Cavalcanti
- Laboratório de Pesquisas em Leishmaniose, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
- * E-mail:
| | - Marcelo Ribeiro-Alves
- Laboratório de Pesquisa Clínica em DST-AIDS, Instituto de Pesquisa Clínica Evandro Chagas, Fiocruz, Rio de Janeiro, Brasil
| | - Luiza de O. R. Pereira
- Laboratório Interdisciplinar de Pesquisas Médicas, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
| | | | | | - Fernanda N. Morgado
- Laboratório de Pesquisas em Leishmaniose, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
| | - Mariana C. Boité
- Laboratório de Pesquisas em Leishmaniose, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
| | - Elisa Cupolillo
- Laboratório de Pesquisas em Leishmaniose, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
| | - Milton O. Moraes
- Laboratório de Hanseníase, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
| | - Renato Porrozzi
- Laboratório de Pesquisas em Leishmaniose, Instituto Oswaldo Cruz, Fiocruz, Rio de Janeiro, Brasil
| |
Collapse
|
5
|
Cássia-Pires R, Boité MC, D'Andrea PS, Herrera HM, Cupolillo E, Jansen AM, Roque ALR. Distinct Leishmania species infecting wild caviomorph rodents (Rodentia: Hystricognathi) from Brazil. PLoS Negl Trop Dis 2014; 8:e3389. [PMID: 25503973 PMCID: PMC4263410 DOI: 10.1371/journal.pntd.0003389] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2014] [Accepted: 10/31/2014] [Indexed: 11/19/2022] Open
Abstract
Background Caviomorph rodents, some of the oldest Leishmania spp. hosts, are widely dispersed in Brazil. Despite both experimental and field studies having suggested that these rodents are potential reservoirs of Leishmania parasites, not more than 88 specimens were analyzed in the few studies of natural infection. Our hypothesis was that caviomorph rodents are inserted in the transmission cycles of Leishmania in different regions, more so than is currently recognized. Methodology We investigated the Leishmania infection in spleen fragments of 373 caviomorph rodents from 20 different species collected in five Brazilian biomes in a period of 13 years. PCR reactions targeting kDNA of Leishmania sp. were used to diagnose infection, while Leishmania species identification was performed by DNA sequencing of the amplified products obtained in the HSP70 (234) targeting. Serology by IFAT was performed on the available serum of these rodents. Principal findings In 13 caviomorph rodents, DNA sequencing analyses allowed the identification of 4 species of the subgenus L. (Viannia): L. shawi, L. guyanensis, L. naiffi, and L. braziliensis; and 1 species of the subgenus L. (Leishmania): L. infantum. These include the description of parasite species in areas not previously included in their known distribution: L. shawi in Thrichomys inermis from Northeastern Brazil and L. naiffi in T. fosteri from Western Brazil. From the four other positive rodents, two were positive for HSP70 (234) targeting but did not generate sequences that enabled the species identification, and another two were positive only in kDNA targeting. Conclusions/Significance The infection rate demonstrated by the serology (51.3%) points out that the natural Leishmania infection in caviomorph rodents is much higher than that observed in the molecular diagnosis (4.6%), highlighting that, in terms of the host species responsible for maintaining Leishmania species in the wild, our current knowledge represents only the “tip of the iceberg.” Leishmaniasis is a major public health problem expanding in Brazil and one of the reasons is that we still have poor knowledge of some aspects of the biology and epidemiology of Leishmania species, including the role of wild mammals. Caviomorph rodents, some of the oldest Leishmania spp. hosts, are widely dispersed in Brazil and reported as potential reservoirs of Leishmania parasites. Spleen fragments of 373 brazilian caviomorph rodents from 20 species were investigated for Leishmania infection. The molecular algorithm proposed to diagnose the infection associate the sensitivity of a molecular target with multiple copies with the specificity of another marker with discriminatory taxonomic ability between species. These demonstrated their usefulness in identifying most of the parasite species infecting the rodents, including the description of species in previously unknown hosts and in areas not previously included in their known distribution, such as L. shawi in Thrichomys inermis from Northeastern Brazil and L. naiffi in T. fosteri from Western Brazil. Although the percent of infection by molecular diagnosis was 4.6%, the serology demonstrated that about 51% of them had been exposed to Leishmania parasites pointing that caviomorph rodents are inserted in enzootic cycles of Leishmania, to a higher extent than currently recognized.
Collapse
Affiliation(s)
- Renata Cássia-Pires
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Mariana C. Boité
- Laboratory of Leishmaniasis Research, Oswaldo Cruz Institute, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Paulo S. D'Andrea
- Laboratory of Biology and Parasitology of Wild Reservoir Mammals, Oswaldo Cruz Institute, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Heitor M. Herrera
- Dom Bosco Catholic University, Campo Grande, Mato Grosso do Sul, Brazil
| | - Elisa Cupolillo
- Laboratory of Leishmaniasis Research, Oswaldo Cruz Institute, Rio de Janeiro, Rio de Janeiro, Brazil
| | - Ana Maria Jansen
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Rio de Janeiro, Rio de Janeiro, Brazil
| | - André Luiz R. Roque
- Laboratory of Trypanosomatid Biology, Oswaldo Cruz Institute, Rio de Janeiro, Rio de Janeiro, Brazil
- * E-mail:
| |
Collapse
|
6
|
Marlow MA, Boité MC, Ferreira GEM, Steindel M, Cupolillo E. Multilocus sequence analysis for Leishmania braziliensis outbreak investigation. PLoS Negl Trop Dis 2014; 8:e2695. [PMID: 24551258 PMCID: PMC3923721 DOI: 10.1371/journal.pntd.0002695] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2013] [Accepted: 12/27/2013] [Indexed: 11/18/2022] Open
Abstract
With the emergence of leishmaniasis in new regions around the world, molecular epidemiological methods with adequate discriminatory power, reproducibility, high throughput and inter-laboratory comparability are needed for outbreak investigation of this complex parasitic disease. As multilocus sequence analysis (MLSA) has been projected as the future gold standard technique for Leishmania species characterization, we propose a MLSA panel of six housekeeping gene loci (6pgd, mpi, icd, hsp70, mdhmt, mdhnc) for investigating intraspecific genetic variation of L. (Viannia) braziliensis strains and compare the resulting genetic clusters with several epidemiological factors relevant to outbreak investigation. The recent outbreak of cutaneous leishmaniasis caused by L. (V.) braziliensis in the southern Brazilian state of Santa Catarina is used to demonstrate the applicability of this technique. Sequenced fragments from six genetic markers from 86 L. (V.) braziliensis strains from twelve Brazilian states, including 33 strains from Santa Catarina, were used to determine clonal complexes, genetic structure, and phylogenic networks. Associations between genetic clusters and networks with epidemiological characteristics of patients were investigated. MLSA revealed epidemiological patterns among L. (V.) braziliensis strains, even identifying strains from imported cases among the Santa Catarina strains that presented extensive homogeneity. Evidence presented here has demonstrated MLSA possesses adequate discriminatory power for outbreak investigation, as well as other potential uses in the molecular epidemiology of leishmaniasis.
Collapse
Affiliation(s)
- Mariel A. Marlow
- Laboratório de Protozoologia, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Mariana C. Boité
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Gabriel Eduardo M. Ferreira
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Mario Steindel
- Laboratório de Protozoologia, Departamento de Microbiologia, Imunologia e Parasitologia, Universidade Federal de Santa Catarina, Florianópolis, Santa Catarina, Brazil
| | - Elisa Cupolillo
- Laboratório de Pesquisa em Leishmaniose, Instituto Oswaldo Cruz, Fundação Oswaldo Cruz, Rio de Janeiro, Brazil
- * E-mail:
| |
Collapse
|
7
|
Boité MC, Mauricio IL, Miles MA, Cupolillo E. New insights on taxonomy, phylogeny and population genetics of Leishmania (Viannia) parasites based on multilocus sequence analysis. PLoS Negl Trop Dis 2012; 6:e1888. [PMID: 23133690 PMCID: PMC3486886 DOI: 10.1371/journal.pntd.0001888] [Citation(s) in RCA: 65] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 09/17/2012] [Indexed: 11/18/2022] Open
Abstract
The Leishmania genus comprises up to 35 species, some with status still under discussion. The multilocus sequence typing (MLST)--extensively used for bacteria--has been proposed for pathogenic trypanosomatids. For Leishmania, however, a detailed analysis and revision on the taxonomy is still required. We have partially sequenced four housekeeping genes--glucose-6-phosphate dehydrogenase (G6PD), 6-phosphogluconate dehydrogenase (6PGD), mannose phosphate isomerase (MPI) and isocitrate dehydrogenase (ICD)--from 96 Leishmania (Viannia) strains and assessed their discriminatory typing capacity. The fragments had different degrees of diversity, and are thus suitable to be used in combination for intra- and inter-specific inferences. Species-specific single nucleotide polymorphisms were detected, but not for all species; ambiguous sites indicating heterozygosis were observed, as well as the putative homozygous donor. A large number of haplotypes were detected for each marker; for 6PGD a possible ancestral allele for L. (Viannia) was found. Maximum parsimony-based haplotype networks were built. Strains of different species, as identified by multilocus enzyme electrophoresis (MLEE), formed separated clusters in each network, with exceptions. NeighborNet of concatenated sequences confirmed species-specific clusters, suggesting recombination occurring in L. braziliensis and L. guyanensis. Phylogenetic analysis indicates L. lainsoni and L. naiffi as the most divergent species and does not support L. shawi as a distinct species, placing it in the L. guyanensis cluster. BURST analysis resulted in six clonal complexes (CC), corresponding to distinct species. The L. braziliensis strains evaluated correspond to one widely geographically distributed CC and another restricted to one endemic area. This study demonstrates the value of systematic multilocus sequence analysis (MLSA) for determining intra- and inter-species relationships and presents an approach to validate the species status of some entities. Furthermore, it contributes to the phylogeny of L. (Viannia) and might be helpful for epidemiological and population genetics analysis based on haplotype/diplotype determinations and inferences.
Collapse
Affiliation(s)
- Mariana C. Boité
- Laboratório de Pesquisa em Leishmaniose, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
| | - Isabel L. Mauricio
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
- Instituto de Higiene e Medicina Tropical/Unidade de Parasitologia e Microbiologia Médicas, Lisboa, Portugal
| | - Michael A. Miles
- Department of Pathogen Molecular Biology, Faculty of Infectious and Tropical Diseases, London School of Hygiene and Tropical Medicine, London, United Kingdom
| | - Elisa Cupolillo
- Laboratório de Pesquisa em Leishmaniose, Fundação Oswaldo Cruz, Instituto Oswaldo Cruz, Rio de Janeiro, Brazil
- * E-mail:
| |
Collapse
|