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cutanous leishmaniasis

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https://www.readbyqxmd.com/read/28931602/an-anti-inflammatory-role-for-nlrp10-in-murine-cutaneous-leishmaniasis
#1
Gwendolyn M Clay, Diogo G Valadares, Joel W Graff, Tyler K Ulland, Richard E Davis, Breanna M Scorza, Bayan Sudan Zhanbolat, Yani Chen, Fayyaz S Sutterwala, Mary E Wilson
The role of the nucleotide-binding domain and leucine-rich repeat containing receptor NLRP10 in disease is incompletely understood. Using three mouse strains lacking the gene encoding NLRP10, only one of which had a coincidental mutation in DOCK8, we documented a role for NLRP10 as a suppressor of the cutaneous inflammatory response to Leishmania major infection. There was no evidence that the enhanced local inflammation was due to enhanced inflammasome activity. NLRP10/DOCK8-deficient mice harbored lower parasite burdens at the cutaneous site of inoculation compared with wild-type controls, whereas NLRP10-deficient mice and controls had similar parasite loads, suggesting that DOCK8 promotes local growth of parasites in the skin, whereas NLRP10 does not...
September 20, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28930253/in-vitro-and-in-vivo-evaluation-of-essential-oil-from-artemisia-absinthium-l-formulated-in-nanocochleates-against-cutaneous-leishmaniasis
#2
Beatriz Tamargo, Lianet Monzote, Abel Piñón, Laura Machín, Marley García, Ramón Scull, William N Setzer
Background: Leishmaniasis is a zoonotic disease caused by protozoan parasites from Leishmania genus. Currently, there are no effective vaccines available and the available therapies are far from ideal. In particular, the development of new therapeutic strategies to reduce the infection caused by Leishmania amazonensis could be considered desirable. Different plant-derived products have demonstrated antileishmanial activity, including the essential oil (EO) from Artemisia absinthium L. (EO-Aa), Asteraceae. Methods: In the present study, the EO-Aa formulated in nanocochleates (EO-Aa-NC) was investigated in vitro against intracellular amastigotes of L...
June 9, 2017: Medicines (Basel, Switzerland)
https://www.readbyqxmd.com/read/28929123/in-vitro-immunomodulatory-activity-of-a-transition-state-analog-inhibitor-of-human-purine-nucleoside-phosphorylase-in-cutaneous-leishmaniasis
#3
Natália Barbosa Carvalho, Fernanda Ventin de Oliveira Prates, Rafael de Castro da Silva, Mayra Elizabeth Ferreira Dourado, Camila Farias Amorim, Paulo Roberto Lima Machado, Fernanda Grendene Pacheco, Temis Weber Furlanetto Corte, Pablo Machado, Diógenes Santiago Santos, Edgar Marcelino de Carvalho
Cutaneous leishmaniasis (CL) is the most common clinical form of American tegumentary leishmaniasis caused by Leishmania (Viannia) braziliensis. CL is associated with a strong Th1 immune response. This exacerbated inflammatory response is correlated with severity of disease and delays the healing time of the ulcer. The fourth-generation immucillin derivative (DI4G), a potent inhibitor of purine nucleoside phosphorylase, has been proposed as a promising agent in the treatment of diseases associated with T cell activation...
2017: Journal of Immunology Research
https://www.readbyqxmd.com/read/28928941/computational-design-of-molecular-motors-as-nanocircuits-in-leishmaniasis
#4
Dipali Kosey, Shailza Singh
Cutaneous leishmaniasis is the most common form of leishmaniasis, caused by Leishmania major and is spread by the bite of a sandfly .This species infects the macrophages and dendritic cells Due to multi-drug resistance, there is a need for a new therapeutic technique. Recently, a novel molecular motor of Leishmania, Myosin XXI, was classified and characterized. In addition, the drug resistance in this organism has been linked with the overexpression of ABC transporters. Systems biology aims to study the simulation and modeling of natural biological systems whereas synthetic biology deals with building novel and artificial biological parts and devices  Together they have contributed enormously to drug discovery, vaccine design and development, infectious disease detection and diagnostics...
2017: F1000Research
https://www.readbyqxmd.com/read/28926630/efficacy-of-pentavalent-antimoniate-intralesional-infiltration-therapy-for-cutaneous-leishmaniasis-a-systematic-review
#5
Nayara Castelano Brito, Ana Rabello, Gláucia Fernandes Cota
BACKGROUND: The mainstays of cutaneous leishmaniasis (CL) treatment, in several world regions, are pentavalent antimony (Sbv) compounds administered parenterally, despite their recognized toxicity, which requires frequent laboratory monitoring and complicates their use in areas with scarce infrastructure. As result of these drawbacks, the WHO Expert Committee on leishmaniasis has expanded the recommendations for the use of local therapies, including Sbv intralesional infiltration (IL-Sbv), as CL therapy alternatives even in the New World...
2017: PloS One
https://www.readbyqxmd.com/read/28916732/il-4-producing-b-cells-regulate-t-helper-cell-dichotomy-in-type-1-and-type-2-controlled-diseases
#6
Ramona Hurdayal, Hlumani H Ndlovu, Mélanie Revaz-Breton, Suraj P Parihar, Justin Komguep Nono, Melissa Govender, Frank Brombacher
Interleukin-4 (IL-4)-induced T helper (Th) 2 cells promote susceptibility to the protozoan parasite Leishmania major, while conferring immunity to the intestinal trematode Schistosoma mansoni Here, we report that abrogation of IL-4 receptor alpha (IL-4Rα) signaling on B cells in BALB/c mice (mb1(cre)IL-4Rα(-/lox)) transformed nonhealer BALB/c to a healer phenotype with an early type 1 and dramatically reduced type 2 immune response and an absence of ulceration and necrosis during cutaneous leishmaniasis. From adoptive reconstitution and mixed bone-marrow chimera studies in B cell-deficient (µMT) mice, we reveal a central role for B cell-derived IL-4 and IL-4Rα in the optimal induction of the susceptible type 2 phenotype to L...
September 15, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28914333/-acute-skin-infections-and-their-imitators-in-children-a-photo-quiz
#7
REVIEW
M Theiler, A Schwieger-Briel, L Weibel
BACKGROUND: Skin infections account for 40% of emergency visits in pediatric dermatology. It is important to promptly recognize skin infections with potential complications and initiate treatment. However some characteristic skin findings may imitate skin infections and are often misdiagnosed. OBJECTIVES: To illustrate frequent pediatric skin infections and pitfalls in view of imitators and differential diagnoses. MATERIALS AND METHODS: A photo quiz is presented with the discussion of a selection of acute pediatric skin infections in comparison to their infectious or noninfectious differential diagnoses...
September 15, 2017: Der Hautarzt; Zeitschrift Für Dermatologie, Venerologie, und Verwandte Gebiete
https://www.readbyqxmd.com/read/28912944/photodynamic-therapy-with-bengal-rose-and-derivatives-against-leishmania-amazonensis
#8
Taisa Rocha Navasconi, Vanessa Nesi Dos Reis, Camila Fabiano Freitas, Paulo Cesar de Souza Pereira, Wilker Caetano, Noboru Hioka, Maria Valdrinez Campana Lonardoni, Sandra Mara Alessi Aristides, Thaís Gomes Verzignassi Silveira
Introduction: The treatment of cutaneous leishmaniasis (CL) is based primarily on the use of pentavalent antimonials, which may lead to many side effects limiting their use. Photodynamic therapy (PDT) is an alternative for the treatment of CL, and some xanthene dyes have the potential for use in PDT. Methods: The xanthenes rose bengal B (RB) and its derivatives rose bengal methyl ester (RBMET), and butyl ester (RBBUT) were analyzed for leishmanicidal activity against promastigotes and intracellular amastigotes of Leishmania amazonensis...
2017: Journal of Lasers in Medical Sciences
https://www.readbyqxmd.com/read/28903998/shape-form-function-and-leishmania-pathogenicity-from-textbook-descriptions-to-biological-understanding
#9
REVIEW
Jack Sunter, Keith Gull
The shape and form of protozoan parasites are inextricably linked to their pathogenicity. The evolutionary pressure associated with establishing and maintaining an infection and transmission to vector or host has shaped parasite morphology. However, there is not a 'one size fits all' morphological solution to these different pressures, and parasites exhibit a range of different morphologies, reflecting the diversity of their complex life cycles. In this review, we will focus on the shape and form of Leishmania spp...
September 2017: Open Biology
https://www.readbyqxmd.com/read/28903890/human-parasitic-diseases-in-bulgaria-2013-2014
#10
Iskra Rainova, Rumen Harizanov, Iskren Kaftandjiev, Nina Tsvetkova, Ognyan Mikov, Eleonora Kaneva
BACKGROUND: In Bulgaria, more than 20 autochthonous human parasitic infections have been described and some of them are widespread. Over 50 imported protozoan and helminthic infections represent diagnostic and therapeutic challenge and pose epidemiological risk due to the possibility of local transmission. AIMS: To establish the distribution of autochthonous and imported parasitic diseases among the population of the country and to evaluate their significance for the public health system...
September 13, 2017: Balkan Medical Journal
https://www.readbyqxmd.com/read/28902290/effect-of-secondary-infection-on-epithelialisation-and-total-healing-of-cutaneous-leishmaniasis-lesions
#11
Liliane de Fátima Antonio, Marcelo Rosandiski Lyra, Maurício Naoto Saheki, Armando de Oliveira Schubach, Luciana de Freitas Campos Miranda, Maria de Fátima Madeira, Maria Cristina da Silva Lourenço, Aline Fagundes, Érica Aparecida Dos Santos Ribeiro, Leonardo Barreto, Maria Inês Fernandes Pimentel
BACKGROUND: Cutaneous leishmaniasis (CL) generally presents with a single or several localised cutaneous ulcers without involvement of mucous membranes. Ulcerated lesions are susceptible to secondary contamination that may slow the healing process. OBJECTIVE: This study verified the influence of non-parasitic wound infection on wound closure (epithelialisation) and total healing. METHODS: Twenty-five patients with a confirmed diagnosis of CL and ulcerated lesions underwent biopsy of ulcer borders...
September 2017: Memórias do Instituto Oswaldo Cruz
https://www.readbyqxmd.com/read/28902258/phlebotomines-in-an-area-endemic-for-american-cutaneous-leishmaniasis-in-northeastern-coast-of-brazil
#12
Ana Patricia Oliveira da Silva, Débora Elienai de Oliveira Miranda, Marcos Antônio Bezerra Santos, Neurisvan Ramos Guerra, Silvia Rafaelli Marques, Leucio Câmara Alves, Rafael Antonio Nascimento Ramos, Gílcia Aparecida de Carvalho
Phlebotomines have worldwide distribution with many species present in Brazil, including the northeastern region, where the fauna is very diverse. The aim of this study was to identify the sandfly fauna in an area endemic for American cutaneous leishmaniasis (ACL) in the state of Pernambuco. Sandflies were caught on three consecutive nights every month from October 2015 to September 2016, from 5 pm to 5 am, using seven light traps of Centers for Disease Control (CDC) type. Females were identified and used for molecular Leishmania detection...
August 24, 2017: Revista Brasileira de Parasitologia Veterinária, Brazilian Journal of Veterinary Parasitology
https://www.readbyqxmd.com/read/28901553/total-leishmania-antigens-with-poly-i-c-induce-th1-protective-response
#13
Maria Victoria Sanchez, Ricardo Javier Eliçabe, María Silvia Di Genaro, María José Germanó, Susana Gea, María Fernanda García Bustos, María Cristina Salomón, Eduardo Alberto Scodeller, Diego Esteban Cargnelutti
AIMS: Our proposal was to develop a vaccine based on total Leishmania antigens (TLA) adjuvanted with polyinosinic-polycytidylic acid [Poly(I:C)] able to induce a Th1 response which can provide protection against Leishmania infection. METHODS AND RESULTS: Mice were vaccinated with two doses of TLA-Poly(I:C) administered by subcutaneous route at three week interval. Humoral and cellular immune responses induced by the immunization were measured. The protective efficacy of the vaccine was evaluated by challenging mice with infective promastigotes of Leishmania (Leishmania) amazonensis into the footpad...
September 13, 2017: Parasite Immunology
https://www.readbyqxmd.com/read/28900023/gene-expression-in-leishmania-is-regulated-predominantly-by-gene-dosage
#14
Stefano A Iantorno, Caroline Durrant, Asis Khan, Mandy J Sanders, Stephen M Beverley, Wesley C Warren, Matthew Berriman, David L Sacks, James A Cotton, Michael E Grigg
Leishmania tropica, a unicellular eukaryotic parasite present in North and East Africa, the Middle East, and the Indian subcontinent, has been linked to large outbreaks of cutaneous leishmaniasis in displaced populations in Iraq, Jordan, and Syria. Here, we report the genome sequence of this pathogen and 7,863 identified protein-coding genes, and we show that the majority of clinical isolates possess high levels of allelic diversity, genetic admixture, heterozygosity, and extensive aneuploidy. By utilizing paired genome-wide high-throughput DNA sequencing (DNA-seq) with RNA-seq, we found that gene dosage, at the level of individual genes or chromosomal "somy" (a general term covering disomy, trisomy, tetrasomy, etc...
September 12, 2017: MBio
https://www.readbyqxmd.com/read/28892183/histopathologic-features-of-cutaneous-leishmaniasis-and-use-of-cd1a-staining-for-amastigotes-in-old-world-and-new-world-leishmaniasis
#15
Lohini Sundharkrishnan, Jeffrey P North
BACKGROUND: Positive CD1a staining of leishmania has been reported in Old World leishmaniasis, but the sensitivity of such staining for other leishmania species is unknown. METHODS: A retrospective review was done on skin biopsies of proven cutaneous leishmaniasis based on histology, immunohistochemistry, culture, and/or PCR. We assessed the pattern of inflammation present and assessed for CD1a (MTB1 clone) positivity in amastigotes. Patients without a clearly documented travel history to delineate Old versus New World leishmaniasis and cases without tissue for CD1a staining were excluded...
September 11, 2017: Journal of Cutaneous Pathology
https://www.readbyqxmd.com/read/28889158/detection-and-identification-of-cutaneous-leishmaniasis-isolates-by-culture-polymerase-chain-reaction-and-sequence-analyses-in-syrian-and-central-anatolia-patients
#16
Yunus E Beyhan, Mehmet Karakus, Alper Karagoz, Mesut Mungan, Aysegul T Ozkan, Murat Hokelek
To characterize the cutaneous leishmaniasis (CL) isolates of Syrian and Central Anatolia patients at species levels. Methods: Skin scrapings of 3 patients (2 Syrian, 1 Turkish) were taken and examined by direct examination, culture in Novy-MacNeal-Nicole (NNN) medium, internal transcribed spacer polymerase chain reaction and sequence analysis (PCR). Results:According to microscopic examination, culture and PCR methods, 3 samples were detected positive. The sequencing results of all isolates in the study were identified as Leishmania tropica...
September 2017: Saudi Medical Journal
https://www.readbyqxmd.com/read/28880944/spatiotemporal-and-molecular-epidemiology-of-cutaneous-leishmaniasis-in-libya
#17
Ahmad Amro, Hamida Al-Dwibe, Aisha Gashout, Olga Moskalenko, Marlena Galafin, Omar Hamarsheh, Marcus Frohme, Anja Jaeschke, Gabriele Schönian, Katrin Kuhls
BACKGROUND: Cutaneous leishmaniasis (CL) is a major public health problem in Libya. In this paper, we describe the eco-epidemiological parameters of CL during the armed conflict period from January 2011 till December 2012. Current spatiotemporal distributions of CL cases were explored and projected to the future using a correlative modelling approach. In addition the present results were compared with our previous data obtained for the time period 1995-2008. METHODOLOGY/PRINCIPAL FINDINGS: We investigated 312 CL patients who presented to the Dermatology Department at the Tripoli Central Hospital and came from 81 endemic areas distributed in 10 districts...
September 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28876416/considerations-of-potential-vectors-and-animal-reservoirs-in-an-emerging-cutaneous-leishmaniasis-area-in-s%C3%A3-o-domingos-ranch-paran%C3%A3-state-in-southearn-brazil
#18
Norberto Assis Membrive, Flora Hisatugo, Thaís Gomes Verzignassi Silveira, Jorge Juarez Vieira Teixeira, Kárin Rosi Reinhold-Castro, Ueslei Teodoro
The aim of this study was to better understand the dynamics of Leishmania sand flies and reservoirs in São Domingos ranch, Arapongas municipality, Paraná State, an anthropic environment in an endemic area of cutaneous leishmaniasis (CL). Sand flies were collected in wild animal burrows, residences and in the forest, with Falcão light trap (FA), Shannon trap (SH) and quadrangular pyramidal trap (QP). The search for Leishmania was made on sand flies, biological samples of wild rodents and dogs using PCR and culture; while parasite direct search (DS) was carried out on animal skin lesions; infection of gold hamsters; and indirect immunofluorescence (IIF) test in dog blood samples...
September 4, 2017: Revista do Instituto de Medicina Tropical de São Paulo
https://www.readbyqxmd.com/read/28874012/potential-resting-and-breeding-sites-of-sand-flies-diptera-psychodidae-and-their-habitat-characteristics-in-leishmaniasis-foci-of-dir-districts-khyber-pakhtunkhwa-pakistan
#19
Khurshaid Khan, Sobia Wahid, Nazma Habib Khan, Naheed Ali
Despite their medical importance, natural breeding sites of sand flies have been poorly explored. Detecting such sites is imperative in vector control strategies. This study aimed to identify potential breeding and resting microhabitats of sand flies and household risk factors associated with cutaneous leishmaniasis transmission in Dir districts, Khyber Pakhtunkhwa, Pakistan. Survey of indoor and outdoor habitats in four tehsils (subdistricts) of upper and lower Dir districts was carried out using sticky traps, flit method, and aspirator...
September 1, 2017: Journal of Medical Entomology
https://www.readbyqxmd.com/read/28873400/sisleish-a-multi-country-standardized-information-system-to-monitor-the-status-of-leishmaniasis-in-the-americas
#20
Ana N S Maia-Elkhoury, Samantha Y O B Valadas, Lia Puppim-Buzanovsky, Felipe Rocha, Manuel J Sanchez-Vazquez
BACKGROUND: In the Americas, leishmaniasis is endemic in 18 countries, and from 2001 through 2015, 17 countries reported 843,931 cases of cutaneous and mucocutaneous leishmaniasis, and 12 countries reported 52,176 cases of visceral leishmaniasis. A Regional Information System (SisLeish) was created in order to provide knowledge of the distribution and tendency of this disease to analyze and monitor the leishmaniasis status. This article analyses the performance and progress of SisLeish from 2012-2015...
September 2017: PLoS Neglected Tropical Diseases
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