Cutaneous leishmaniasis caused by parasites exhibits a wide range of clinical manifestations. Although parasites influence disease severity, cytolytic CD8 T cell responses mediate disease. While these responses originate in the lymph node, we find that expression of the cytolytic effector molecule granzyme B is restricted to lesional CD8 T cells in - infected mice, suggesting that local cues within inflamed skin induce cytolytic function. Expression of Blimp-1 ( ), a transcription factor necessary for cytolytic CD8 T cell differentiation, is driven by hypoxia within the inflamed skin. Hypoxia is further enhanced by the recruitment of neutrophils that consume oxygen to produce reactive oxygen species, ultimately increasing granzyme B expression in CD8 T cells. Importantly, lesions from cutaneous leishmaniasis patients exhibit hypoxia transcription signatures that correlate with the presence of neutrophils. Thus, targeting hypoxia-driven signals that support local differentiation of cytolytic CD8 T cells may improve the prognosis for patients with cutaneous leishmaniasis, as well as other inflammatory skin diseases where cytolytic CD8 T cells contribute to pathogenesis.
This study aims to identify the most sensitive colorimetric test for assessing intracellular drug susceptibility of Leishmania tropica to conventional antileishmanial drugs. To this end, the efficacy of four colorimetric methods-MTT, XTT, MTS, and WST-8-was compared using reference L. tropica promastigotes.
Cutaneous T-cell lymphomas (CTCLs) characterized by infiltration of the skin of T-cell lymphocytes represent an uncommon and rare subset of extranodal non-Hodgkin lymphomas. Primary CTCL, not otherwise specified, is among the most important subtypes of CTCLs characterized by rapid cutaneous dissemination and systemic involvement. Herein, we present a case of primary CTCL, not otherwise specified, diagnosed via 18F-FDG PET/CT after initial misdiagnosis of cutaneous leishmaniasis.
Department of Parasitology, Faculty of Medicine, Ege University, Izmir, Turkey; Department of Basic Oncology, Institute of Health Sciences, Ege University, Izmir, Turkey. Electronic address:
Leishmaniasis is a neglected infectious disease that affects millions of people worldwide. Visceral leishmaniasis (VL) caused by Leishmania infantum and cutaneous leishmaniasis (CL) caused by L. major/ L.
The study of extracellular vesicles has become an incredibly important field of study, but the inherent heterogeneity of these vesicles continues to make their study challenging. The genetic variability and well-documented protocols for the growth and vesicle isolation from parasites provide a unique opportunity to compare the heterogeneity of different populations secreted by clones. was cultured on solid SDM agar plates and 8 clonal colonies were selected.
Fundação Oswaldo Cruz, Instituto Nacional de Infectologia Evandro Chagas, Laboratório de Pesquisa Clínica e Vigilância em Leishmaniose, Rio de Janeiro, Rio de Janeiro, Brazil.
Diagnostic networks ensure efficiency in disease diagnosis. A descriptive study evaluated the network of public health laboratories (NPHL) in Minas Gerais State, Brazil, using diagnostic results for tegumentary leishmaniasis (TL) from the laboratory management system in 2017-2020. Out of 1,369 individuals analyzed, 704 (51.
