Leishmania tropica
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA170214 | ENA |
REPOSITORIES: ENA
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Project description:Leishmania amazonensis is a protozoan that primarily infects macrophages and causes cutaneous leishmaniasis in humans. MicroRNAs (miRNAs) are small noncoding RNAs that regulate gene expression at posttranscriptional levels. Previous work demonstrated changes in miRNA profile of host cells favoring parasite survivel. Thus, here we demonstrate that human macrophages upregulate several miRNAs on the initial time points of infection, including the hsa-miR-372, hsa-miR-373, and hsa-miR-520d, which present the same seed. Further functional analysis demonstrated that inhibition of the miR-372 impaired Leishmania survival in THP-1 macrophages and the effect was further enhanced with combinatorial inhibition of the miR-372/373/520d family, pointing to a cooperative mechanism. Our study demonstrated miRNA-dependent modulation of polyamines production, establishing permissive conditions for intracellular parasite survival.Our findings suggest that the miR-372/373/520d family may represent a potential target for the development of new therapeutic strategies against cutaneous leishmaniasis.
2023-09-11 | GSE242513 | GEO
Project description:In this study employed a systems analysis approach to study molecular signatures of cutaneous leishmaniasis (CL) caused by Leishmania tropica (L. tropica) in the skin lesions of ulcerativeCL (UCL) and non-ulcerative CL( NUCL) patients. Results from RNA-seq analysis determined shared and unique functional transcriptional pathways in the lesions of the UCL and Nucl patients. Several transcriptional pathways involved in inflammatory response were positively enriched in the CL lesions. These results enhance our understanding of human skin response to CL caused by L. tropica.
2022-11-01 | GSE216638 | GEO
Project description:As a vector-borne disease, leishmaniasis is caused by a parasitic protozoans of leishmania genus and transmitted by female Phlebotomine sandflies. Depending on the body location where immotile form of the parasite namely amastigote is proliferated, three main clinical forms as cutaneous, muco-cutaneous and visceral leishmaniases are defined. While manifestation of cutaneous leishmaniasis is skin lesions on the exposed part of the body, enlarged lymph nodes, spleen or liver along with fever, fatigue and weight loss are the symptoms of visceral leishmaniasis. The most dangerous form is visceral leishmaniasis since it may end up with fatalities if patients are not treated. The purpose of this study was to investigate the difference between the protein expression profiles of leishmania isolates obtained from visceral and cutaneous leishmaniasis patients. To compare two sample groups to each other genetically, L.infantum was chosen since it causes both visceral and cutaneous leishmaniasis. Additionally, another sample group as cutaneous leishmaniasis caused by L.tropica was included to make the comparison both intra- and interspecies level. For protein profiling, both gel-based and gel-free proteomic approaches were carried out. In brief, a total of 15 samples, 5 from each group, were separated on pI 3-10 2D-PAGE gel. Additionally, 9 of those 15 samples, 3 from each group, were analyzed according to qualitative shotgun proteomics method and differential proteins were determined by drawing venn diagram.
2022-01-14 | PXD016333 | Pride
Project description:A flagellated protozoan that is the etiological agent of cutaneous, mucocutaneous and/or visceral leishmaniasis.
| PRJNA9528 | ENA
Project description:The host immune response plays a critical role not only in protection from human leishmaniasis, but also in promoting disease severity. Although candidate gene approaches in mouse models of leishmaniasis have been extremely informative, a global understanding of the immune pathways active in lesions from human patients is lacking. To address this issue, genome-wide transcriptional profiling of Leishmania braziliensis-infected cutaneous lesions and normal skin controls was carried out. A signature of the L. braziliensis skin lesion was defined that includes over 2,000 differentially regulated genes. Pathway-level analysis of this transcriptional response revealed key biological pathways, as well as specific genes, associated with cutaneous pathology, generating a testable 'metapathway' model of immune-driven lesion pathology, and providing new insights for treatment of human leishmaniasis. Thirty-five skin biopsies were analyzed, including 10 normal skin biopsies (2 from North America and 8 from non-endemic area in Brazil), and 25 skin lesion biopsies (8 early cutaneous lesions, 17 late cutaneous lesions) obtained from Leishmania brazilensis-infected patients presenting at the Corte de Pedra Health Post in Corte de Pedra, Bahia, Brazil.
2014-03-07 | E-GEOD-55664 | biostudies-arrayexpress