Lipophosphoglycan 3 From Leishmania infantum chagasi Binds Heparin With Micromolar Affinity.

In this study, we identified the product with an HSP90 (heat shock protein 90) domain encoded by lipophosphoglycan (LPG3) gene as a L infantum chagasi HBP (HBPLc). Structural analysis using the LPG3 recombinant protein suggests that it is organized as a tetramer. Binding analysis confirms that it is capable of binding heparin with micromolar affinity. Inhibition of adenosine triphosphatase activity in the presence of heparin, molecular modeling, and in silico docking analysis suggests that heparin-binding site superimposes with the adenosine triphosphate-binding site. Together, these results show new properties of LPG3 and suggest an important role in leishmaniasis. PMID: 29568220 [PubMed]
Source: Bioinformatics and Biology Insights - Category: Bioinformatics Authors: Tags: Bioinform Biol Insights Source Type: research

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Publication date: Available online 15 August 2019Source: Veterinary ParasitologyAuthor(s): Ana Vitória Verde Oliveira Rocha, Brenda Fernanda Sodré Moreno, Aline Diniz Cabral, Nayara Mendes Louzeiro, Leandro Macedo Miranda, Vivian Magalhães Brandão dos Santos, Francisco Borges Costa, Rita de Maria Seabra Nogueira, Arlei Marcili, Márcia Aparecida Sperança, Andréa Pereira da CostaAbstractVisceral leishmaniasis is a zoonotic disease caused by Leishmania infantum for which dogs are the main reservoir. In South America, presence of this disease is expanding along with increasing d...
Source: Veterinary Parasitology - Category: Veterinary Research Source Type: research
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Source: Frontiers in Immunology - Category: Allergy & Immunology Source Type: research
In this study we analyzed the potential of the association of meglumine antimoniate (MA) with the oxiranes epoxy-α-lapachone (LAP) or epoxymethyl-lawsone (LAW). Results demonstrated that association between these drugs enhanced leishmanicidal activity on Leishmania (Leishmania) amazonensis infection. The compounds were tested in monotherapy or in combinations (3:1; 1:1 and 1:3) and reduced intracellular parasite numbers, measured by the endocytic index, in all tested conditions. The most effective combination regimens were MA/LAP or MA/LAW in 3:1 ratio, which achieved a reduction of 98.3% and 93.6% in the endocytic i...
Source: International Journal for Parasitology: Drugs and Drug Resistance - Category: Parasitology Source Type: research
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Source: Journal of Trace Elements in Medicine and Biology - Category: Biochemistry Source Type: research
In this study, a 502 bp segment of NT4 gene sequence was selected and designed as antisense transcripts after insertion in the parasite. The NT4 construct was transfected into L. major promastigotes for in vitro study of gene expression. Then, BALB/c mice infected with transgenic Leishmania and wild-type strain along with the number and size of lesions were studied in vivo. Results: The study showed that relative expression of NT4 gene in mutant Leishmania was lower than in the control on Day 3 to 20. The percentages and the number of amastigotes in infected macrophages with wild-type strain L. major were more than inf...
Source: Journal of Vector Borne Diseases - Category: Infectious Diseases Tags: J Vector Borne Dis Source Type: research
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Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
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Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
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Source: Mol Biol Cell - Category: Molecular Biology Authors: Tags: Methods Mol Biol Source Type: research
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Source: International Journal for Parasitology - Category: Parasitology Authors: Tags: Int J Parasitol Source Type: research
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Source: Parasitology International - Category: Parasitology Source Type: research
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