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Leishmania braziliensis

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https://www.readbyqxmd.com/read/28602279/an-elisa-immunoassay-employing-a-conserved-leishmania-hypothetical-protein-for-the-serodiagnosis-of-visceral-and-tegumentary-leishmaniasis-in-dogs-and-humans
#1
Ana Maria R S Carvalho, Lourena E Costa, Beatriz C S Salles, Thaís T O Santos, Fernanda F Ramos, Mariana P Lima, Miguel A Chávez-Fumagalli, Bruna T Silvestre, Áquila S B Portela, Bruno M Roatt, Julia A G Silveira, Denise U Gonçalves, Danielle F Magalhães-Soares, Mariana C Duarte, Daniel Menezes-Souza, Eduardo A F Coelho
In the present study, a conserved Leishmania hypothetical protein, namely LiHypA, was evaluated for the serodiagnosis of visceral and tegumentary leishmaniasis in dogs and humans. This protein showed a high amino acid sequence homology between viscerotropic and cutaneotropic Leishmania species. An enzyme-linked immunosorbent assay (ELISA) was developed using the recombinant antigen (rLiHypA), in addition to the A2 protein and two parasite antigenic preparations, which were used as controls. Regarding human diagnosis, results showed that rLiHypA was more sensitive and specific than ELISA-L...
June 8, 2017: Cellular Immunology
https://www.readbyqxmd.com/read/28600554/seroconversion-to-lutzomyia-intermedia-linb-13-as-a-biomarker-for-developing-cutaneous-leishmaniasis
#2
Augusto M Carvalho, Kiyoshi F Fukutani, Rohit Sharma, Rebecca P Curvelo, José Carlos Miranda, Aldina Barral, Edgar M Carvalho, Jesus G Valenzuela, Fabiano Oliveira, Camila I de Oliveira
Sand flies inject saliva while feeding in the vertebrate host and anti-saliva antibodies can be used as biomarkers of exposure to Leishmania vectors. We expressed recombinant salivary proteins from Lutzomyia intermedia, a vector of Leishmania braziliensis, and evaluated the seroreactivity in exposed individuals in search for exposure markers. We found a strong correlation among positive serology to recombinant proteins LinB-13, 26, 15, 21 and to salivary proteins: rLinB-13 was the top performing molecule; IgG4 was the most predominant antibody subclass and antibodies to rLinB-13 did not cross react with Lu...
June 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28591265/disseminated-cutaneous-leishmaniasis-caused-by-leishmania-braziliensis-in-southern-brazil
#3
Norberto Assis Membrive, Flávio Jun Kazuma, Thaís Gomes Verzignassi Silveira, Jorge Juarez Vieira Teixeira, Kárin Rosi Reinhold-Castro, Ueslei Teodoro
The authors report a case of disseminated cutaneous leishmaniasis caused by Leishmania (Viannia) braziliensis, in a 55 years old patient with 1,119 lesions distributed throughout the body. The patient resides in Sabáudia municipality, North of Paraná State, Southern Brazil, where there was no previous report of this form of leishmaniasis. Treatment with meglumine antimoniate was successful, although the diagnosis was made only five months later.
June 1, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28591261/sporotrichoid-leishmaniasis-a-cross-sectional-clinical-epidemiological-and-laboratory-study-in-rio-de-janeiro-state-brazil
#4
Livia Martins Veloso de Carvalho, Maria Inês Fernandes Pimentel, Fátima Conceição-Silva, Érica de Camargo Ferreira E Vasconcellos, Cláudia Maria Valete-Rosalino, Marcelo Rosandiski Lyra, Mariza de Matos Salgueiro, Maurício Naoto Saheki, Maria de Fátima Madeira, Eliame Mouta-Confort, Liliane de Fátima Antonio, Aline Fagundes da Silva, Leonardo Pereira Quintella, Sandro Javier Bedoya-Pacheco, Armando de Oliveira Schubach
Background: Atypical presentations of cutaneous leishmaniasis include sporotrichoid leishmaniasis (SL), which is clinically described as a primary ulcer combined with lymphangitis and nodules and/or ulcerated lesions along its pathway. Aims: To assess the differences between patients with sporotrichoid leishmaniasis and typical cutaneous leishmaniasis (CL). Methods: From January 2004 to December 2010, 23 cases of SL (4.7%) were detected among 494 CL patients diagnosed at a reference center for the disease in Rio de Janeiro State, Brazil...
June 1, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28573463/detection-and-identification-of-leishmania-spp-application-of-two-hsp70-based-pcr-rflp-protocols-to-clinical-samples-from-the-new-world
#5
Ana M Montalvo, Jorge Fraga, Dídier Tirado, Gustavo Blandón, Annia Alba, Gert Van der Auwera, Iván Darío Vélez, Carlos Muskus
Leishmaniasis is highly prevalent in New World countries, where several methods are available for detection and identification of Leishmania spp. Two hsp70-based PCR protocols (PCR-N and PCR-F) and their corresponding restriction fragment length polymorphisms (RFLP) were applied for detection and identification of Leishmania spp. in clinical samples recruited in Colombia, Guatemala, and Honduras. A total of 93 cases were studied. The samples were classified into positive or suspected of leishmaniasis according to parasitological criteria...
July 2017: Parasitology Research
https://www.readbyqxmd.com/read/28570640/aspects-of-the-ecology-of-phlebotomine-sand-flies-diptera-psychodidae-in-the-private-natural-heritage-reserve-sanctuary-cara%C3%A3-a
#6
Gabriel Barbosa Tonelli, Aline Tanure, Felipe Dutra Rêgo, Gustavo Mayr de Lima Carvalho, Taynãna César Simões, José Dilermando Andrade Filho
Leishmaniases are a set of parasitic diseases of zoonotic origin that are transmitted by sandfly vectors in wild, rural and urban environments. Their distribution is dependent not only the distribution of vectors, but also on the distribution of mammalian reservoirs. Only by understanding the transmission cycle of these diseases, such as knowing the participating vectors and reservoirs, can one can understand the epidemiology and ecological relationships of leishmaniases. Ecotourism has become an important area of economic growth in Brazil...
2017: PloS One
https://www.readbyqxmd.com/read/28558061/low-versus-high-dose-of-antimony-for-american-cutaneous-leishmaniasis-a-randomized-controlled-blind-non-inferiority-trial-in-rio-de-janeiro-brazil
#7
Mauricio Naoto Saheki, Marcelo Rosandiski Lyra, Sandro Javier Bedoya-Pacheco, Liliane de Fátima Antônio, Maria Inês Fernandes Pimentel, Mariza de Matos Salgueiro, Érica de Camargo Ferreira E Vasconcellos, Sonia Regina Lambert Passos, Ginelza Peres Lima Dos Santos, Madelon Novato Ribeiro, Aline Fagundes, Maria de Fátima Madeira, Eliame Mouta-Confort, Mauro Célio de Almeida Marzochi, Cláudia Maria Valete-Rosalino, Armando de Oliveira Schubach
BACKGROUND: Although high dose of antimony is the mainstay for treatment of American cutaneous leishmaniasis (ACL), ongoing major concerns remain over its toxicity. Whether or not low dose antimony regimens provide non-inferior effectiveness and lower toxicity has long been a question of dispute. METHODS: A single-blind, non-inferiority, randomized controlled trial was conducted comparing high dose with low dose of antimony in subjects with ACL treated at a referral center in Rio de Janeiro, an endemic area of Leishmania (Viannia) braziliensis transmission...
2017: PloS One
https://www.readbyqxmd.com/read/28530056/-cutaneous-leishmaniasis-in-israel-2016-an-update
#8
REVIEW
Michal Solomon, Eli Schwartz
Leishmaniasis is endemic in Israel and is increasing in its frequency. The pathogens that cause cutaneous leishmaniasis (CL) in Israel are Leishmania major (L. major) and Leishmania tropica (L. tropica). In recent years, there have been significant changes in the distribution of these species. L. major is endemic mainly in the Negev, Arava and the Beit She'an Valley. L. tropica is endemic in Tiberias, northern Sea of Galilee, Samaria and in the vicinity of Jerusalem such as at Kfar Adumim, Ma'ale Adumim and Anathoth (north-east of Jerusalem)...
October 2016: Harefuah
https://www.readbyqxmd.com/read/28511704/the-use-of-kdna-minicircle-subclass-relative-abundance-to-differentiate-between-leishmania-l-infantum-and-leishmania-l-amazonensis
#9
Marcello Ceccarelli, Luca Galluzzi, Aurora Diotallevi, Francesca Andreoni, Hailie Fowler, Christine Petersen, Fabrizio Vitale, Mauro Magnani
BACKGROUND: Leishmaniasis is a neglected disease caused by many Leishmania species, belonging to subgenera Leishmania (Leishmania) and Leishmania (Viannia). Several qPCR-based molecular diagnostic approaches have been reported for detection and quantification of Leishmania species. Many of these approaches use the kinetoplast DNA (kDNA) minicircles as the target sequence. These assays had potential cross-species amplification, due to sequence similarity between Leishmania species. Previous works demonstrated discrimination between L...
May 16, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28502644/leishmania-v-braziliensis-infecting-bats-from-pantanal-wetland-brazil-first-records-for-platyrrhinus-lineatus-and-artibeus-planirostris
#10
Eduardo de Castro Ferreira, Agnes Antônio Sampaio Pereira, Maurício Silveira, Carina Margonari, Glaucia Elisete Barbosa Marcon, Adriana de Oliveira França, Ludiele Souza Castro, Marcelo Oscar Bordignon, Erich Fischer, Walfrido Moraes Tomas, Maria Elizabeth Cavalheiros Dorval, Célia Maria Ferreira Gontijo
In the New World genus Leishmania parasites are etiological agents of neglected zoonoses known as leishmaniasis. Its epidemiology is very complex due to the participation of several species of sand fly vectors and mammalian hosts, and man is an accidental host. Control is very difficult because of the different epidemiological patterns of transmission observed. Studies about Leishmania spp. infection in bats are so scarce, which represents a large gap in knowledge about the role of these animals in the transmission cycle of these pathogens, especially when considering that Chiroptera is one of the most abundant and diverse orders among mammals...
May 11, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28500815/oral-pentoxifylline-associated-with-pentavalent-antimony-a-randomized-trial-for-cutaneous-leishmaniasis
#11
Graça Brito, Mayra Dourado, Luiz Henrique Guimarães, Everson Meireles, Albert Schriefer, Edgar Marcelino de Carvalho, Paulo Roberto Lima Machado
AbstractCutaneous leishmaniasis (CL) by Leishmania braziliensis is associated with decreasing cure rates in Brazil. Standard treatment with pentavalent antimony (Sb(v)) cures only 50-60% of the cases. The immunopathogenesis of CL ulcer is associated with high interferon-γ and tumor necrosis factor (TNF) production. Pentoxifylline, a TNF inhibitor, has been successfully used in association with Sb(v) in mucosal and cutaneous leishmaniasis. This randomized, double-blind, and placebo-controlled trial aimed to evaluate the efficacy and safety of oral pentoxifylline plus Sb(v) versus placebo plus Sb(v) in patients with CL in Bahia, Brazil...
May 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28499458/evaluation-of-a-multilocus-sequence-typing-mlst-scheme-for-leishmania-viannia-braziliensis-and-leishmania-viannia-panamensis-in-colombia
#12
Giovanny Herrera, Carolina Hernández, Martha S Ayala, Carolina Flórez, Aníbal A Teherán, Juan David Ramírez
BACKGROUND: Leishmaniases are parasitic vector-borne diseases affecting more than 12 million people in 98 countries. In Colombia, leishmaniasis is widespread and the most common clinical manifestation is cutaneous, mainly caused by L. panamensis and L. braziliensis. Currently, the genetic diversity of these species in Colombia is unknown. To address this, we applied molecular techniques for their characterization, using multilocus sequence typing (MLST) to explore the genetic variability and phylodynamics of the disease...
May 12, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28482935/nerolidol-the-main-constituent-of-piper-aduncum-essential-oil-has-anti-leishmania-braziliensis-activity
#13
Ligia Fernanda Ceole, Maria DAS Graças Cardoso, Maurilio José Soares
Leishmania (Viannia) braziliensis is a protozoan that causes mucocutaneous leishmaniasis, which is an infectious disease that affects more than 12 million people worldwide. The available treatment is limited, has side-effects or is inefficient. In a search for alternative compounds of natural origin, we tested the microbicidal activity of Piper aduncum essential oil (PaEO) on this parasite. Our data showed that PaEO had an inhibitory effect on the growth of L. braziliensis promastigotes with an IC50/24 h=77·9 µg mL-1...
May 9, 2017: Parasitology
https://www.readbyqxmd.com/read/28481276/multi-anti-parasitic-activity-of-arylidene-ketones-and-thiazolidene-hydrazines-against-trypanosoma-cruzi-and-leishmania-spp
#14
Guzmán Álvarez, Cintya Perdomo, Cathia Coronel, Elena Aguilera, Javier Varela, Gonzalo Aparicio, Flavio R Zolessi, Nallely Cabrera, Celeste Vega, Miriam Rolón, Antonieta Rojas de Arias, Ruy Pérez-Montfort, Hugo Cerecetto, Mercedes González
A series of fifty arylideneketones and thiazolidenehydrazines was evaluated against Leishmania infantum and Leishmania braziliensis. Furthermore, new simplified thiazolidenehydrazine derivatives were evaluated against Trypanosoma cruzi. The cytotoxicity of the active compounds on non-infected fibroblasts or macrophages was established in vitro to evaluate the selectivity of their anti-parasitic effects. Seven thiazolidenehydrazine derivatives and ten arylideneketones had good activity against the three parasites...
May 7, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28472733/in-vitro-inhibition-of-leishmania-attachment-to-sandfly-midguts-and-ll-5-cells-by-divalent-metal-chelators-anti-gp63-and-phosphoglycans
#15
Rodrigo Pedro Soares, Ellen Cristina Félix Altoé, Vítor Ennes-Vidal, Simone M da Costa, Elizabeth Ferreira Rangel, Nataly Araújo de Souza, Vanderlei Campos da Silva, Petr Volf, Claudia Masini d'Avila-Levy
Leishmania braziliensis and Leishmania infantum are the causative agents of cutaneous and visceral leishmaniasis, respectively. Several aspects of the vector-parasite interaction involving gp63 and phosphoglycans have been individually assayed in different studies. However, their role under the same experimental conditions was not studied yet. Here, the roles of divalent metal chelators, anti-gp63 antibodies and purified type I phosphoglycans (PGs) were evaluated during in vitro parasite attachment to the midgut of the vector...
July 2017: Protist
https://www.readbyqxmd.com/read/28468680/cd3-cd4-neg-cd8-neg-double-negative-t-lymphocytes-and-nkt-cells-as-the-main-cytotoxic-related-cd107a-cells-in-lesions-of-cutaneous-leishmaniasis-caused-by-leishmania-viannia-braziliensis
#16
Raquel Ferraz, Clarissa F Cunha, Maria Inês F Pimentel, Marcelo R Lyra, Tatiana Pereira-Da-Silva, Armando O Schubach, Alda Maria Da-Cruz, Alvaro Luiz Bertho
BACKGROUND: Cutaneous leishmaniasis (CL) is caused by Leishmania (Viannia) braziliensis, which infects dermal macrophages and dendritic cells, causing an intense immune-mediated-tissue inflammation and a skin ulcer with elevated borders that can heal spontaneously or after antimonial therapy. The resolution of lesions depends on an adaptive immune response, and cytotoxic cells seem to have a fundamental role in this process. The aim of this study is to better understand the role of cytotoxicity mediated mechanisms that occur during the immune response in the CL lesion milieu, considering distinct cytotoxic-related CD107a(+) cells, such as CD8(+), CD4(+), CD4(neg) CD8(neg) (double-negative, DN) and CD4(+)CD8(+) (double-positive, DP) T lymphocytes, as well as NK and NKT cells...
May 3, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28467433/correction-meta-transcriptome-profiling-of-the-human-leishmania-braziliensis-cutaneous-lesion
#17
Stephen M Christensen, Laura A L Dillon, Lucas P Carvalho, Sara Passos, Fernanda O Novais, V Keith Hughitt, Daniel P Beiting, Edgar M Carvalho, Phillip Scott, Najib M El-Sayed, David M Mosser
[This corrects the article DOI: 10.1371/journal.pntd.0004992.].
May 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28461312/knockdown-of-host-antioxidant-defense-genes-enhances-the-effect-of-glucantime-on-intracellular-leishmania-braziliensis-in-human-macrophages
#18
Jair Téllez, Ibeth Romero, Maurilio José Soares, Mario Steindel, Alvaro José Romanha
Leishmaniasis is a neglected tropical disease affecting millions of people worldwide and represents a major public health problem. Information on protein expression patterns and functional roles within the context of Leishmania-infected human monocyte-derived macrophages (MDMs) under drug treatment conditions are essential to understand the role of these cells in leishmaniasis treatment. We analyzed functional changes in expression of human MDM genes and proteins during in vitro infection by Leishmania braziliensis and treatment with Glucantime (Sb(V)) using quantitative polymerase chain reaction (qPCR) arrays, western blotting, confocal microscopy and short-interfering RNA (siRNA) human gene-inhibition assays...
May 1, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28457848/evaluation-of-methylene-blue-as-photosensitizer-in-promastigotes-of-leishmania-major-and-leishmania-braziliensis
#19
Juliana Guerra Pinto, Jaciara Fagundes, André Henrique Correia Pereira, Josane Mittmann, Leandro José Raniero, Juliana Ferreira-Strixino
The cutaneous leishmaniasis is caused by the protozoan of the genus Leishmania. It is considered by WHO as a public health issue and a neglected disease, which affects rural workers and it is also a risk to travelers in endemic areas. The conventional treatment is toxic and leads to severe side effects. The photodynamic therapy has been studied as an alternative treatment to cutaneous leishmaniasis. This study aimed to evaluate the methylene blue internalization and the impact of the PDT in the viability and morphology of Leishmania major and Leishmania braziliensis promastigote in culture medium...
April 27, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28397969/aim2-inflammasome-is-associated-with-disease-severity-in-tegumentary-leishmaniasis-caused-by-leishmania-v-braziliensis
#20
R B Moreira, C Pirmez, M P de Oliveira-Neto, L S Aguiar, A J S Gonçalves, L O R Pereira, L Abreu, M P De Oliveira
The inflammasome is a multiprotein signalling platform involved in the pathogenesis of various inflammatory skin diseases. Herein, we investigated gene and protein expression of the inflammasome molecules AIM2 and NLRP3 in active lesions from patients with L. (V.) braziliensis-associated tegumentary leishmaniasis (TL) and correlated these findings with the clinical presentations and responses to therapy. Real-time PCR assays showed a significantly higher AIM2 gene expression in mucosal leishmaniasis (ML) compared with that in cutaneous leishmaniasis (CL)...
April 11, 2017: Parasite Immunology
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