Results 41 to 50 of about 14,623 (258)

Leishmania (L.) amazonensis peptidase activities inside the living cells and in their lysates

Molecular and Biochemical Parasitology, 2012
In this study we investigated the peptidase activity in Leishmania (L.) amazonensis live amastigote by confocal microscopy using peptidyl-MCA as substrates, the hydrolysis of which releases the MCA fluorophore inside the cells. Cell pre-treatment with peptidase inhibitors indicated the presence of cysteine and serine peptidases.
Caroselli, Elide E., Assis, Diego M., Barbiéri, Clara L., Júdice, Wagner A.S., Juliano, Maria A., Gazarini, Marcos L., Juliano, Luiz   +6 more
openaire   +2 more sources

Emerging Role for the PERK/eIF2α/ATF4 in Human Cutaneous Leishmaniasis. [PDF]

, 2017
Leishmania parasites utilize adaptive evasion mechanisms in infected macrophages to overcome host defenses and proliferate. We report here that the PERK/eIF2α/ATF4 signaling branch of the integrated endoplasmic reticulum stress response (IERSR) is ...
Aktas, B.H., Calegari-Silva, T.C., Cavalcanti, Á., Dias-Teixeira, K.L., Fasel, N., Gomes, C.M., Lopes, U.G., Medina, J.M., Pereira, RMS, Real, F., Santana, AKM, Silva, J.S., Teteo, N., Vivarini, Á.C.   +13 more
core   +3 more sources

Sphingolipid degradation in Leishmania (Leishmania) amazonensis.

PLoS Neglected Tropical Diseases, 2012
BackgroundHuman leishmaniasis is caused by more than 20 Leishmania species and has a wide range of symptoms. Our recent studies have demonstrated the essential role of sphingolipid degradation in the virulence of Leishmania (Leishmania) major, a species ...
Agiesh Balakrishna Pillai, Wei Xu, Ou Zhang, Kai Zhang   +3 more
doaj   +1 more source

The Paradox of a Phagosomal Lifestyle: How Innate Host Cell-Leishmania amazonensis Interactions Lead to a Progressive Chronic Disease

Frontiers in Immunology, 2021
Intracellular phagosomal pathogens represent a formidable challenge for innate immune cells, as, paradoxically, these phagocytic cells can act as both host cells that support pathogen replication and, when properly activated, are the critical cells that ...
Matheus B. Carneiro, Nathan C. Peters
doaj   +1 more source

Changes to cholesterol trafficking in macrophages by Leishmania parasites infection [PDF]

, 2017
Leishmania spp. are protozoan parasites that are transmitted by sandfly vectors during blood sucking to vertebrate hosts and cause a spectrum of diseases called leishmaniases.
Anderson, Andrade-Neto, Antoine, Bansal, Berman, Blanchette-Mackie, Burack, Carstea, Carvalho, Chakraborty, Chattopadhyay, Collins, Coombs, Coppens, De Cicco, Desvergne, Duclos, Edwards, Ehrenman, Fernandes, Ghosh, Ghosh, Ghosh, Ginger, Ginger, Goldstein, Groener, Hamid, Hart, Ikonen, Infante, Johndrow, Kima, Kima, Kok, Kwon, Lal, Lecoeur, Lippuner, Livak, Majumder, Maxfield, McIntosh, Misslitz, Naureckiene, Neufeld, Osorio y Fortea, Ovalle-Bracho, Paape, Paape, Pereira, Portugal, Pucadyil, Rabhi, Redgrave, Roberts, Rosenzweig, Rub, Russell, Saunders, Sen, Shamshiev, Soares, Sorensen, Tetley, Tewary, Tontonoz, Weinheber   +67 more
core   +2 more sources

Impact of tumor necrosis factor receptor p55 deficiency in susceptibility of C57BL/6 mice to infection with Leishmania (Leishmania) amazonensis [PDF]

, 2014
Tumor necrosis factor (TNF) is involved in host resistance to several intracellular pathogens. Although the critical role of TNF receptor (TNFR)p55 in Leishmania (Leishmania) major infection has been demonstrated, the impact of TNFRp55 deficiency on L ...
Cargnelutti, Diego Esteban, Celedon, Verónica, Cuello Carrión, Fernando Darío, Di Genaro, María Silvia, Gea, Susana, Salomón, María Cristina, Scodeller, Eduardo   +6 more
core   +1 more source

Leishmania amazonensis promastigotes present two distinct modes of nucleus and kinetoplast segregation during cell cycle. [PDF]

, 2015
: Here, we show the morphological events associated with organelle segregation and their timing in the cell cycle of a reference strain of Leishmania (L.) amazonensis promastigotes, the main causative agent of Tegumentary leishmaniasis in the Americas ...
Cano, Maria Isabel Nogueira, da Silva, Marcelo Santos, Elias, Maria Carolina, Freitas-Júnior, Lúcio de Holanda, Monteiro, Jomar Patrício, Nunes, Vinícius Santana, Perez, Arina Marina, Vasconcelos, Elton José   +7 more
core   +2 more sources

Leishmania mexicana in Proechimys iheringi denigratus Moojen (Rodentia, Echimyidae) in a region endemic for American cutaneous leishmaniasis

Revista da Sociedade Brasileira de Medicina Tropical, 1985
Three isolates of Leishmania were recovered from five of 27 specimens of the rodent Proechimys iheringi denigratus Moojen captured near Três Braços in the Atlantic Forest region of Bahia, Brazil.
Air C. Barretto, Norman E. Peterson, Ednaldo Lago, Ana C. Rosa, Rosely S.M. Braga, Cesar A.C. Cuba, Julio A. Vexenat, Philip D. Marsden   +7 more
doaj   +3 more sources

Contribution of microscopy for understanding the mechanism of action against trypanosomatids [PDF]

, 2018
Transmission electron microscopy (TEM) has proved to be a useful tool to study the ultrastructural alterations and the target organelles of new antitrypanosomatid drugs.
A Martinez-Palomo, A Montalvetti, A Rassi, AB Penissi, AE Eakin, AH Kolien, AJ Solari, AM Sánchez, Ana Yecê das Neves Pinto, C Brack, CF Silva Da, D Gonzalez-Pacanowska, DA Campbell, DA Johnston, DJ Hammond, DV Andrade, E Bontempi, E Lozano, E Lozano, E Lozano, EO Ogbadoiyi, ES Garcia, ES Lozano, F Dos Reis, FR Opperdoes, FR Opperdoes, FR Opperdoes, FS Laranja, H Meyer, H Meyer, J Aldunate, J Lukes, J McKerrow, J Mottram, JA Urbina, JA Urbina, JA Urbina, JA Urbina, JC Engel, JC Linder, JCP Dias, JCP Dias, JD Bergstrom, JD Maya, JF Turrens, JJ Marr, JL Avila, JL Avila, Juliano de Toledo, K Lazardi, K Miranda, K Miranda, KH Lee, L Simpson, LV Muschietti, M Meirelles, M Nieto, MC Elias, MCQB Elias, MR Ariyanayagam, MR Ariyanayagam, NM Sayed El, O Campetella, OS Giordano, OS Giordano, P Barrera, P Webster, PF Pimenta, R Docampo, S Sepúlveda-Boza, SD Brengio, SR Wilkinson, T Souto-Padron, T Souto-Padron, T Souto-Padron, T Souto-Padron, TA Shapiro, TS Tiuman, V Jimenez-Ortiz, V Sülsen, VP Sülsen, VP Sülsen, VV Costantino, W Souza De, W Souza De, W Souza De, W Souza De, W Souza De, W Souza De, Wanderley de Souza, WE Gutteridge   +90 more
core   +1 more source

Role of protein kinase R in the killing of Leishmania major by macrophages in response to neutrophil elastase and TLR4 via TNF and IFN [PDF]

, 2014
In cutaneous leishmaniasis, Leishmania amazonensis activates macrophage double-stranded, RNA-activated protein kinase R (PKR) to promote parasite growth. In our study, Leishmania major grew normally in RAW cells, RAW-expressing dominant-negative PKR (PKR-
Abu-Dayyeh I., Aislan de Carvalho Vivarini, Ana Paula C. A. Lima, Da Silva R., Danelli M. G., Jeremy C. Mottram, Marilia S. Faria, Nylen S., Tereza C. Calegari‐Silva, Ulisses Gazos Lopes, Vivarini Ade C.   +10 more
core   +1 more source