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Mussismilia braziliensis

ABSTRACT: MussismiliaBraziliensisWP Transcriptome

PROVIDER: PRJNA543846 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR9166160.fastq.gz	Fastqsanger.gz
	SRR9166151.fastq.gz	Fastqsanger.gz
	SRR9166161.fastq.gz	Fastqsanger.gz
	SRR9166152.fastq.gz	Fastqsanger.gz
	SRR9166153.fastq.gz	Fastqsanger.gz

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Transcriptional remodeling of primary human monocytes exposed to Leishmania braziliensis

Project description:Trained immunity is a phenomenon whereby innate immune cells such as monocytes or macrophages undergo functional reprogramming after exposure to certain microbial components, altering their responses to future exposures. This study profiled the transcriptome of human monocytes trained with Leishmania braziliensis and then re-exposed to lipopolysaccharide.

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A mouse model of Leishmania braziliensis braziliensis infection produced by coinjection with sand fly saliva.

Project description:To development a reliable murine model of Leishmania braziliensis braziliensis infection, parasites were injected into BALB/c mice in the presence of phlebotomine sand fly salivary gland lysates, which have previously been shown to greatly increase the infectivity of L. major in mice. When injected with salivary gland lysates, L. braziliensis braziliensis produced progressively enlarging cutaneous nodules, containing many macrophages filled with Leishmania amastigotes. In contrast, L. braziliensis injected without gland extracts produced small and rapidly regressing lesions. Isoenzyme analysis, monoclonal antibodies, and the polymerase chain reaction with L. braziliensis-specific oligonucleotide primers and probes confirmed that parasites causing the lesions were L. braziliensis.

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Extreme inbreeding in Leishmania braziliensis.

Project description:Leishmania species of the subgenus Viannia and especially Leishmania braziliensis are responsible for a large proportion of New World leishmaniasis cases. The reproductive mode of Leishmania species has often been assumed to be predominantly clonal, but remains unsettled. We have investigated the genetic polymorphism at 12 microsatellite loci on 124 human strains of Leishmania braziliensis from 2 countries, Peru and Bolivia. There is substantial genetic diversity, with an average of 12.4 +/- 4.4 alleles per locus. There is linkage disequilibrium at a genome-wide scale, as well as a substantial heterozygote deficit (more than 50% the expected value from Hardy-Weinberg equilibrium), which indicates high levels of inbreeding. These observations are inconsistent with a strictly clonal model of reproduction, which implies excess heterozygosity. Moreover, there is large genetic heterogeneity between populations within countries (Wahlund effect), which evinces a strong population structure at a microgeographic scale. Our findings are compatible with the existence of population foci at a microgeographic scale, where clonality alternates with sexuality of an endogamic nature, with possible occasional recombination events between individuals of different genotypes. These findings provide key clues on the ecology and transmission patterns of Leishmania parasites.

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Project description:Leishmania braziliensis strain 2700 small RNA

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Project description:Orbital biopsy of nonspecific orbital inflammation, commonly referred to as "orbital pseudotumor," typically shows a combination of polyclonal lymphocytes, plasmocytes, leukocytes, macrophages, and variable degrees of collagen deposition. Herein, we report a patient with a positive history of mucocutaneous leishmaniasis who presented with an orbital mass with a histological profile of idiopathic orbital inflammation. Immunohistochemical and molecular analysis of the orbital specimens demonstrated that the orbital inflammation was associated with the presence of antigens of Leishmania braziliensis and DNA from the parasite.

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Multilocus sequence analysis for Leishmania braziliensis outbreak investigation.

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