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Fernandes JCR, Zamboni DS. Mechanisms regulating host cell death during Leishmania infection. mBio 2024:e0198023. [PMID: 39392429 DOI: 10.1128/mbio.01980-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/12/2024] Open
Abstract
Parasites from the Leishmania genus are the causative agents of leishmaniasis and primarily reside within macrophages during mammalian infection. Their ability to establish intracellular infection provides a secure niche for proliferation while evading detection. However, successful multiplication within mammalian cells requires the orchestration of multiple mechanisms that control host cell viability. In contrast, innate immune cells, such as macrophages, can undergo different forms of cell death in response to pathogenic intracellular microbes. Thus, modulation of these different forms of host cell death is crucial for Leishmaniasis development. The regulation of host cell apoptosis, a form of programmed cell death, is crucial for sustaining parasites within viable host cells. Accordingly, several studies have demonstrated evasion of apoptosis induced by dermotropic and viscerotropic Leishmania species. Conversely, the prevention of pyroptosis, an inflammatory form of cell death, ensures the establishment of infection by silencing the release of mediators that could trigger massive proinflammatory responses. This manuscript explores how Leishmania regulates various host cell death pathways and overviews seminal studies on regulating host cell apoptosis by different Leishmania species.
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Affiliation(s)
- Juliane C R Fernandes
- Department of Cell Biology, School of Medicine of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
| | - Dario S Zamboni
- Department of Cell Biology, School of Medicine of Ribeirão Preto, University of São Paulo, São Paulo, Brazil
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Palomino-Cano C, Moreno E, Irache JM, Espuelas S. Targeting and activation of macrophages in leishmaniasis. A focus on iron oxide nanoparticles. Front Immunol 2024; 15:1437430. [PMID: 39211053 PMCID: PMC11357945 DOI: 10.3389/fimmu.2024.1437430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2024] [Accepted: 07/16/2024] [Indexed: 09/04/2024] Open
Abstract
Macrophages play a pivotal role as host cells for Leishmania parasites, displaying a notable functional adaptability ranging from the proinflammatory, leishmanicidal M1 phenotype to the anti-inflammatory, parasite-permissive M2 phenotype. While macrophages can potentially eradicate amastigotes through appropriate activation, Leishmania employs diverse strategies to thwart this activation and redirect macrophages toward an M2 phenotype, facilitating its survival and replication. Additionally, a competition for iron between the two entities exits, as iron is vital for both and is also implicated in macrophage defensive oxidative mechanisms and modulation of their phenotype. This review explores the intricate interplay between macrophages, Leishmania, and iron. We focus the attention on the potential of iron oxide nanoparticles (IONPs) as a sort of immunotherapy to treat some leishmaniasis forms by reprogramming Leishmania-permissive M2 macrophages into antimicrobial M1 macrophages. Through the specific targeting of iron in macrophages, the use of IONPs emerges as a promising strategy to finely tune the parasite-host interaction, endowing macrophages with an augmented antimicrobial arsenal capable of efficiently eliminating these intrusive microbes.
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Affiliation(s)
- Carmen Palomino-Cano
- Department of Pharmaceutical Sciences, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
| | - Esther Moreno
- Department of Pharmaceutical Sciences, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
| | - Juan M. Irache
- Department of Pharmaceutical Sciences, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Navarra Medical Research Institute (IdiSNA), Pamplona, Spain
| | - Socorro Espuelas
- Department of Pharmaceutical Sciences, School of Pharmacy and Nutrition, University of Navarra, Pamplona, Spain
- Navarra Medical Research Institute (IdiSNA), Pamplona, Spain
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Na J, Engwerda C. The role of CD4 + T cells in visceral leishmaniasis; new and emerging roles for NKG7 and TGFβ. Front Cell Infect Microbiol 2024; 14:1414493. [PMID: 38881737 PMCID: PMC11176485 DOI: 10.3389/fcimb.2024.1414493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2024] [Accepted: 05/21/2024] [Indexed: 06/18/2024] Open
Abstract
Visceral leishmaniasis is a potentially devastating neglected tropical disease caused by the protozoan parasites Leishmania donovani and L. infantum (chagasi). These parasites reside in tissue macrophages and survive by deploying a number of mechanisms aimed at subverting the host immune response. CD4+ T cells play an important role in controlling Leishmania parasites by providing help in the form of pro-inflammatory cytokines to activate microbiocidal pathways in infected macrophages. However, because these cytokines can also cause tissue damage if over-produced, regulatory immune responses develop, and the balance between pro-inflammatory and regulatory CD4+ T cells responses determines the outcomes of infection. Past studies have identified important roles for pro-inflammatory cytokines such as IFNγ and TNF, as well as regulatory co-inhibitory receptors and the potent anti-inflammatory cytokine IL-10. More recently, other immunoregulatory molecules have been identified that play important roles in CD4+ T cell responses during VL. In this review, we will discuss recent findings about two of these molecules; the NK cell granule protein Nkg7 and the anti-inflammatory cytokine TGFβ, and describe how they impact CD4+ T cell functions and immune responses during visceral leishmaniasis.
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Affiliation(s)
- Jinrui Na
- QIMR Berghofer Medical Research Institute, Brisbane, QLD, Australia
- School of Medicine, University of Queensland, Brisbane, QLD, Australia
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Amani S, Alinejad S, Asadi N, Yousefi E, Khademvatan S, Howarth GS. Anti-Leishmania major activity of Calotropis procera extract by increasing ROS production and upregulating TNF-α, IFN-γ and iNOS mRNA expression under in vitro conditions. Trop Med Health 2024; 52:16. [PMID: 38303082 PMCID: PMC10832188 DOI: 10.1186/s41182-024-00578-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Accepted: 01/10/2024] [Indexed: 02/03/2024] Open
Abstract
BACKGROUND Leishmaniasis, caused by protozoan parasites of the genus Leishmania, is a neglected tropical disease with 700,000 to 1,000,000 global new cases annually. Adverse effects associated with expense, long-term treatment and drug resistance have made conventional therapies unfavorable, encouraging the search for alternative drugs based on plant products. In this study, the effect of Calotropis procera (Asclepiadaceae) extract against viability of promastigotes and amastigotes of Leishmania major was evaluated in vitro. METHODS The extract from the leaves of C. procera seedlings was prepared using a methanol maceration method. The colorimetric cell viability 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay was used to determine the growth-inhibitory effect of the extract on promastigotes. The level of reactive oxygen species (ROS) in promastigote cultures was determined after treatment with the extract using the 2',7'-dichlorofluorescein diacetate (DCFH-DA) method and compared with untreated cultures (control). After exposure to the extract the expression levels of tumor necrosis factor-α (TNF-α), interferon gamma (IFN-γ) and inducible nitric oxide synthase (iNOS) genes were determined and compared to control in peripheral blood mononuclear cells (PBMCs) infected with L. major. RESULTS Based on the MTT assay, the C. procera extract significantly reduced the proliferation of L. major promastigotes with IC50 values of 377.28 and 222.44 μg/mL for 24 and 72 h, respectively (p < 0.01). After treatment with 222.44 and 377.28 μg/mL of C. procera extract, ROS production in L. major promastigote cultures increased 1.2- to 1.65-fold and 2- to 4-fold compared to the control, respectively (p < 0.05). C. procera extract induced significant increases in gene expression of TNF-α (2.76-14.83 fold), IFN-γ (25.63-threefold) and iNOS (16.32-3.97 fold) in infected PBMCs compared to control (p < 0.01). CONCLUSIONS On the basis of its anti-leishmanial activity, C. procera can be considered as a promising new plant source for the potential treatment of leishmaniasis.
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Affiliation(s)
- Shahla Amani
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute & Department of Medical Parasitology and Mycology, Urmia University of Medical Sciences, Urmia, Iran
| | - Soheila Alinejad
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute & Department of Medical Parasitology and Mycology, Urmia University of Medical Sciences, Urmia, Iran
| | - Negar Asadi
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute & Department of Medical Parasitology and Mycology, Urmia University of Medical Sciences, Urmia, Iran
| | - Elham Yousefi
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute & Department of Medical Parasitology and Mycology, Urmia University of Medical Sciences, Urmia, Iran
| | - Shahram Khademvatan
- Cellular and Molecular Research Center, Cellular and Molecular Medicine Institute & Department of Medical Parasitology and Mycology, Urmia University of Medical Sciences, Urmia, Iran.
| | - Gordon Stanley Howarth
- School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, South Australia, Australia
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Reyaz E, Puri N, Selvapandiyan A. Global Remodeling of Host Proteome in Response to Leishmania Infection. ACS Infect Dis 2024; 10:5-19. [PMID: 38084821 DOI: 10.1021/acsinfecdis.3c00492] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
The protozoan parasite Leishmania possesses an intrinsic ability to modulate a multitude of pathways in the host, toward aiding its own proliferation. In response, the host reprograms its cellular, immunological, and metabolic machinery to evade the parasite's lethal impact. Besides inducing various antioxidant signaling pathways to counter the elevated stress response proteins like heme oxygenase-1 (HO-1), Leishmania also attempts to delay host cell apoptosis by promoting anti-apoptotic proteins like Bcl-2. The downstream modulation of apoptotic proteins is regulated by effector pathways, including the PI3K/Akt survival pathway, the mitogen-activated protein kinases (MAPKs) signaling pathway, and STAT phosphorylation. In addition, Leishmania assists in its infection in a time-dependent manner by modulating the level of various proteins of autophagic machinery. Immune effector cells, such as mast cells and neutrophils, entrap and kill the pathogen by secreting various granular proteins. In contrast, the host macrophages exert their leishmanicidal effect by secreting various cytokines, such as IL-2, IL-12, etc. An interplay of various signaling pathways occurs in an organized network that is highly specific to both pathogen and host species. This Review analyzes the modulation of expression of proteins, including the cytokines, providing a realistic approach toward understanding the pathophysiology of disease and predicting some prominent markers for disease intervention and vaccine support strategies.
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Affiliation(s)
- Enam Reyaz
- Department of Molecular Medicine, Jamia Hamdard, New Delhi 110062, India
| | - Niti Puri
- School of Life Sciences, Jawaharlal Nehru University, New Delhi 110067, India
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Rodríguez-González J, Gutiérrez-Kobeh L. Apoptosis and its pathways as targets for intracellular pathogens to persist in cells. Parasitol Res 2023; 123:60. [PMID: 38112844 PMCID: PMC10730641 DOI: 10.1007/s00436-023-08031-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2023] [Accepted: 11/10/2023] [Indexed: 12/21/2023]
Abstract
Apoptosis is a finely programmed process of cell death in which cells silently dismantle and actively participate in several operations such as immune response, differentiation, and cell growth. It can be initiated by three main pathways: the extrinsic, the perforin granzyme, and the intrinsic that culminate in the activation of several proteins in charge of tearing down the cell. On the other hand, apoptosis represents an ordeal for pathogens that live inside cells and maintain a strong dependency with them; thus, they have evolved multiple strategies to manipulate host cell apoptosis on their behalf. It has been widely documented that diverse intracellular bacteria, fungi, and parasites can interfere with most steps of the host cell apoptotic machinery to inhibit or induce apoptosis. Indeed, the inhibition of apoptosis is considered a virulence property shared by many intracellular pathogens to ensure productive replication. Some pathogens intervene at an early stage by interfering with the sensing of extracellular signals or transduction pathways. Others sense cellular stress or target the apoptosis regulator proteins of the Bcl-2 family or caspases. In many cases, the exact molecular mechanisms leading to the interference with the host cell apoptotic cascade are still unknown. However, intense research has been conducted to elucidate the strategies employed by intracellular pathogens to modulate host cell death. In this review, we summarize the main routes of activation of apoptosis and present several processes used by different bacteria, fungi, and parasites to modulate the apoptosis of their host cells.
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Affiliation(s)
- Jorge Rodríguez-González
- Unidad de Investigación UNAM-INC, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México-Instituto Nacional de Cardiología "Ignacio Chávez,", Juan Badiano No. 1, Col. Belisario Domínguez, Sección XVI, Delegación Tlalpan, C.P. 14080, Ciudad de México, México
- Laboratorio de Estudios Epidemiológicos, Clínicos, Diseños Experimentales e Investigación, Facultad de Ciencias Químicas, Universidad Autónoma "Benito Juárez" de Oaxaca, Oaxaca, Mexico
| | - Laila Gutiérrez-Kobeh
- Unidad de Investigación UNAM-INC, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México-Instituto Nacional de Cardiología "Ignacio Chávez,", Juan Badiano No. 1, Col. Belisario Domínguez, Sección XVI, Delegación Tlalpan, C.P. 14080, Ciudad de México, México.
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Lago T, Medina L, Lago J, Santana N, Cardoso T, Rocha A, Leal-Calvo T, Carvalho EM, Castellucci LC. MicroRNAs regulating macrophages infected with Leishmania L. ( V.) Braziliensis isolated from different clinical forms of American tegumentary leishmaniasis. Front Immunol 2023; 14:1280949. [PMID: 38143766 PMCID: PMC10748487 DOI: 10.3389/fimmu.2023.1280949] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2023] [Accepted: 11/20/2023] [Indexed: 12/26/2023] Open
Abstract
Background Leishmaniasis is an infectious disease caused by protozoa of the genus Leishmania. There are still no vaccines, and therapeutic options are limited, indicating the constant need to understand the fine mechanisms of its pathophysiology. An approach that has been explored in leishmaniasis is the participation of microRNAs (miRNAs), a class of small non-coding RNAs that act, in most cases, to repress gene expression. miRNAs play a role in the complex and plastic interaction between the host and pathogens, either as part of the host's immune response to neutralize infection or as a molecular strategy employed by the pathogen to modulate host pathways to its own benefit. Methods Monocyte-derived macrophages from healthy subjects were infected with isolates of three clinical forms of L. braziliensis: cutaneous (CL), mucosal (ML), and disseminated (DL) leishmaniasis. We compared the expression of miRNAs that take part in the TLR/NFkB pathways. Correlations with parasite load as well as immune parameters were analyzed. Results miRNAs -103a-3p, -21-3p, 125a-3p -155-5p, -146a-5p, -132- 5p, and -147a were differentially expressed in the metastatic ML and DL forms, and there was a direct correlation between miRNAs -103a-3p, -21-3p, -155-5p, -146a-5p, -132-5p, and -9-3p and parasite load with ML and DL isolates. We also found a correlation between the expression of miR-21-3p and miR-146a-5p with the antiapoptotic gene BCL2 and the increase of viable cells, whereas miR-147a was indirectly correlated with CXCL-9 levels. Conclusion The expression of miRNAs is strongly correlated with the parasite load and the inflammatory response, suggesting the participation of these molecules in the pathogenesis of the different clinical forms of L. braziliensis.
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Affiliation(s)
- Tainã Lago
- Serviço de Imunologia da Universidade Federal da Bahia, Salvador, Brazil
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Ministério da Ciência, Tecnologia, Inovações e Comunicações, CNPq, Brasília, DF, Brazil
| | - Lilian Medina
- Serviço de Imunologia da Universidade Federal da Bahia, Salvador, Brazil
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
| | - Jamile Lago
- Serviço de Imunologia da Universidade Federal da Bahia, Salvador, Brazil
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Ministério da Ciência, Tecnologia, Inovações e Comunicações, CNPq, Brasília, DF, Brazil
| | - Nadja Santana
- Serviço de Imunologia da Universidade Federal da Bahia, Salvador, Brazil
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
| | - Thiago Cardoso
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Ministério da Ciência, Tecnologia, Inovações e Comunicações, CNPq, Brasília, DF, Brazil
- Laboratório de Pesquisas Clínicas (LAPEC), Instituto Gonçalo Moniz-FIOCRUZ, Sakvador, Bahia, Brazil
| | - Alan Rocha
- Laboratório de Pesquisas Clínicas (LAPEC), Instituto Gonçalo Moniz-FIOCRUZ, Sakvador, Bahia, Brazil
| | | | - Edgar M. Carvalho
- Serviço de Imunologia da Universidade Federal da Bahia, Salvador, Brazil
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Ministério da Ciência, Tecnologia, Inovações e Comunicações, CNPq, Brasília, DF, Brazil
- Laboratório de Pesquisas Clínicas (LAPEC), Instituto Gonçalo Moniz-FIOCRUZ, Sakvador, Bahia, Brazil
| | - Léa Cristina Castellucci
- Serviço de Imunologia da Universidade Federal da Bahia, Salvador, Brazil
- Programa de Pós-graduação em Ciências da Saúde da Universidade Federal da Bahia, Salvador, Brazil
- Instituto Nacional de Ciência e Tecnologia em Doenças Tropicais (INCT-DT), Ministério da Ciência, Tecnologia, Inovações e Comunicações, CNPq, Brasília, DF, Brazil
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Kot K, Kupnicka P, Tarnowski M, Tomasiak P, Kosik-Bogacka D, Łanocha-Arendarczyk N. The role of apoptosis and oxidative stress in the pathophysiology of Acanthamoeba spp. infection in the kidneys of hosts with different immunological status. Parasit Vectors 2023; 16:445. [PMID: 38041167 PMCID: PMC10693070 DOI: 10.1186/s13071-023-06052-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2023] [Accepted: 11/10/2023] [Indexed: 12/03/2023] Open
Abstract
BACKGROUND Acanthamoeba spp. are opportunistic pathogens that cause inflammation, mostly in the brain, lungs and cornea. Recent reports indicate kidney dysfunction in hosts with systemic acanthamoebiasis. The aim of the study was to analyze the gene expression and protein concentration of NADPH oxidase 2 and 4 (NOX2 and NOX4, respectively) and nuclear erythroid 2-related factor (Nrf2) in the kidneys of hosts with systemic acanthamoebiasis. We also aimed to determine the protein and gene expressions of Bcl2, Bax, caspases 3 and 9. METHODS Mice were divided into four groups based on their immunological status and Acanthamoeba sp. infection: A, immunocompetent Acanthamoeba sp.-infected mice; AS, immunosuppressed Acanthamoeba sp.- infected mice; C, immunocompetent uninfected mice; CS, immunosuppressed uninfected mice. NOX2, NOX4 and Nrf2 were analyzed by quantitative reverse transcription PCR (qRT-PCR) and ELISA methods, while pro-apoptotic and anti-apoptotic proteins (Bax and Bcl-2, respectively), Cas9, Cas3 were analyzed by qRT-PCR and western blot methods. RESULTS: Increased gene expression and/or protein concentration of NOX2 and NOX4 were found in both immunocompetent and immunosuppressed mice infected with Acanthamoeba sp. (groups A and AS, respectively). Gene expression and/or protein concentration of Nrf2 were higher in group A than in control animals. Compared to control mice, in the AS group the expression of the Nrf2 gene was upregulated while the concentration of Nrf2 protein was decreased. Additionally in A group, higher gene and protein expression of Bcl-2, and lower gene as well as protein expression of Bax, caspases 3 and 9 were noted. In contrast, the AS group showed lower gene and protein expression of Bcl-2, and higher gene as well as protein expression of Bax, caspases 3 and 9. CONCLUSIONS This study is the first to address the mechanisms occurring in the kidneys of hosts infected with Acanthamoeba sp. The contact of Acanthamoeba sp. with the host cell surface and/or the oxidative burst caused by elevated levels of NOXs lead to an antioxidant response enhanced by the Nrf2 pathway. Acanthamoeba sp. have various strategies concerning apoptosis. In immunocompetent hosts, amoebae inhibit the apoptosis of kidney cells, and in immunosuppressed hosts, they lead to increased apoptosis by the intrinsic pathway and thus to a more severe course of the disease.
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Affiliation(s)
- Karolina Kot
- Department of Biology and Medical Parasitology, Pomeranian Medical University in Szczecin, Szczecin, Poland.
| | - Patrycja Kupnicka
- Department of Biochemistry, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Maciej Tarnowski
- Department of Physiology in Health Sciences, Pomeranian Medical University in Szczecin, Szczecin, Poland
| | - Patrycja Tomasiak
- Institute of Physical Culture Sciences, University of Szczecin, Szczecin, Poland
| | - Danuta Kosik-Bogacka
- Independent Laboratory of Pharmaceutical Botany, Department of Biology and Medical Parasitology, Pomeranian Medical University in Szczecin, Szczecin, Poland
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Giambra V, Pagliari D, Rio P, Totti B, Di Nunzio C, Bosi A, Giaroni C, Gasbarrini A, Gambassi G, Cianci R. Gut Microbiota, Inflammatory Bowel Disease, and Cancer: The Role of Guardians of Innate Immunity. Cells 2023; 12:2654. [PMID: 37998389 PMCID: PMC10669933 DOI: 10.3390/cells12222654] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2023] [Revised: 11/14/2023] [Accepted: 11/17/2023] [Indexed: 11/25/2023] Open
Abstract
Inflammatory bowel diseases (IBDs) are characterized by a persistent low-grade inflammation that leads to an increased risk of colorectal cancer (CRC) development. Several factors are implicated in this pathogenetic pathway, such as innate and adaptive immunity, gut microbiota, environment, and xenobiotics. At the gut mucosa level, a complex interplay between the immune system and gut microbiota occurs; a disequilibrium between these two factors leads to an alteration in the gut permeability, called 'leaky gut'. Subsequently, an activation of several inflammatory pathways and an alteration of gut microbiota composition with a proliferation of pro-inflammatory bacteria, known as 'pathobionts', take place, leading to a further increase in inflammation. This narrative review provides an overview on the principal Pattern Recognition Receptors (PRRs), including Toll-like receptors (TLRs) and NOD-like receptors (NLRs), focusing on their recognition mechanisms, signaling pathways, and contributions to immune responses. We also report the genetic polymorphisms of TLRs and dysregulation of NLR signaling pathways that can influence immune regulation and contribute to the development and progression of inflammatory disease and cancer.
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Affiliation(s)
- Vincenzo Giambra
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy; (V.G.); (B.T.); (C.D.N.)
| | - Danilo Pagliari
- Medical Officer of the Carabinieri Corps, Health Service of the Carabinieri General Headquarters, 00197 Rome, Italy;
| | - Pierluigi Rio
- Department of Translational Medicine and Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Catholic University of Rome, 00168 Rome, Italy; (P.R.); (A.G.); (G.G.)
| | - Beatrice Totti
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy; (V.G.); (B.T.); (C.D.N.)
| | - Chiara Di Nunzio
- Institute for Stem Cell Biology, Regenerative Medicine and Innovative Therapies (ISBReMIT), Fondazione IRCCS “Casa Sollievo della Sofferenza”, 71013 San Giovanni Rotondo, Italy; (V.G.); (B.T.); (C.D.N.)
| | - Annalisa Bosi
- Department of Medicine and Technological Innovation, University of Insubria, via H Dunant 5, 21100 Varese, Italy; (A.B.); (C.G.)
| | - Cristina Giaroni
- Department of Medicine and Technological Innovation, University of Insubria, via H Dunant 5, 21100 Varese, Italy; (A.B.); (C.G.)
| | - Antonio Gasbarrini
- Department of Translational Medicine and Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Catholic University of Rome, 00168 Rome, Italy; (P.R.); (A.G.); (G.G.)
| | - Giovanni Gambassi
- Department of Translational Medicine and Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Catholic University of Rome, 00168 Rome, Italy; (P.R.); (A.G.); (G.G.)
| | - Rossella Cianci
- Department of Translational Medicine and Surgery, Fondazione Policlinico Universitario A. Gemelli IRCCS, Catholic University of Rome, 00168 Rome, Italy; (P.R.); (A.G.); (G.G.)
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Pessôa-Pereira D, Scorza BM, Cyndari KI, Beasley EA, Petersen CA. Modulation of Macrophage Redox and Apoptotic Processes to Leishmania infantum during Coinfection with the Tick-Borne Bacteria Borrelia burgdorferi. Pathogens 2023; 12:1128. [PMID: 37764937 PMCID: PMC10537792 DOI: 10.3390/pathogens12091128] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 09/01/2023] [Accepted: 09/02/2023] [Indexed: 09/29/2023] Open
Abstract
Canine leishmaniosis (CanL) is a zoonotic disease caused by protozoan Leishmania infantum. Dogs with CanL are often coinfected with tick-borne bacterial pathogens, including Borrelia burgdorferi in the United States. These coinfections have been causally associated with hastened disease progression and mortality. However, the specific cellular mechanisms of how coinfections affect microbicidal responses against L. infantum are unknown. We hypothesized that B. burgdorferi coinfection impacts host macrophage effector functions, prompting L. infantum intracellular survival. In vitro experiments demonstrated that exposure to B. burgdorferi spirochetes significantly increased L. infantum parasite burden and pro-inflammatory responses in DH82 canine macrophage cells. Induction of cell death and generation of mitochondrial ROS were significantly decreased in coinfected DH82 cells compared to uninfected and L. infantum-infected cells. Ex vivo stimulation of PBMCs from L. infantum-seronegative and -seropositive subclinical dogs with spirochetes and/or total Leishmania antigens promoted limited induction of IFNγ. Coexposure significantly induced expression of pro-inflammatory cytokines and chemokines associated with Th17 differentiation and neutrophilic and monocytic recruitment in PBMCs from L. infantum-seropositive dogs. Excessive pro-inflammatory responses have previously been shown to cause CanL pathology. This work supports effective tick prevention and risk management of coinfections as critical strategies to prevent and control L. infantum progression in dogs.
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Affiliation(s)
- Danielle Pessôa-Pereira
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA; (D.P.-P.); (B.M.S.); (E.A.B.)
- Center for Emerging Infectious Diseases, University of Iowa, Iowa City, IA 52242, USA;
| | - Breanna M. Scorza
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA; (D.P.-P.); (B.M.S.); (E.A.B.)
- Center for Emerging Infectious Diseases, University of Iowa, Iowa City, IA 52242, USA;
| | - Karen I. Cyndari
- Center for Emerging Infectious Diseases, University of Iowa, Iowa City, IA 52242, USA;
- Department of Emergency Medicine, University of Iowa Hospitals and Clinics, Iowa City, IA 52242, USA
| | - Erin A. Beasley
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA; (D.P.-P.); (B.M.S.); (E.A.B.)
- Center for Emerging Infectious Diseases, University of Iowa, Iowa City, IA 52242, USA;
| | - Christine A. Petersen
- Department of Epidemiology, College of Public Health, University of Iowa, Iowa City, IA 52242, USA; (D.P.-P.); (B.M.S.); (E.A.B.)
- Center for Emerging Infectious Diseases, University of Iowa, Iowa City, IA 52242, USA;
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11
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Baars I, Jaedtka M, Dewitz LA, Fu Y, Franz T, Mohr J, Gintschel P, Berlin H, Degen A, Freier S, Rygol S, Schraven B, Kahlfuß S, van Zandbergen G, Müller AJ. Leishmania major drives host phagocyte death and cell-to-cell transfer depending on intracellular pathogen proliferation rate. JCI Insight 2023; 8:e169020. [PMID: 37310793 PMCID: PMC10443809 DOI: 10.1172/jci.insight.169020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2023] [Accepted: 06/05/2023] [Indexed: 06/15/2023] Open
Abstract
The virulence of intracellular pathogens relies largely on the ability to survive and replicate within phagocytes but also on release and transfer into new host cells. Such cell-to-cell transfer could represent a target for counteracting microbial pathogenesis. However, our understanding of the underlying cellular and molecular processes remains woefully insufficient. Using intravital 2-photon microscopy of caspase-3 activation in the Leishmania major-infected (L. major-infected) live skin, we showed increased apoptosis in cells infected by the parasite. Also, transfer of the parasite to new host cells occurred directly without a detectable extracellular state and was associated with concomitant uptake of cellular material from the original host cell. These in vivo findings were fully recapitulated in infections of isolated human phagocytes. Furthermore, we observed that high pathogen proliferation increased cell death in infected cells, and long-term residency within an infected host cell was only possible for slowly proliferating parasites. Our results therefore suggest that L. major drives its own dissemination to new phagocytes by inducing host cell death in a proliferation-dependent manner.
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Affiliation(s)
- Iris Baars
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Moritz Jaedtka
- Division of Immunology, Paul Ehrlich Institute, Langen, Germany
- Institute for Immunology, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Leon-Alexander Dewitz
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Yan Fu
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Tobias Franz
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Juliane Mohr
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Patricia Gintschel
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Hannes Berlin
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Angelina Degen
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Sandra Freier
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Stefan Rygol
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Burkhart Schraven
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Sascha Kahlfuß
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
- Institute of Molecular and Clinical Immunology, Medical Faculty, Otto von Guericke University Magdeburg, Magdeburg, Germany
| | - Ger van Zandbergen
- Division of Immunology, Paul Ehrlich Institute, Langen, Germany
- Institute for Immunology, University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
- Research Center for Immunotherapy (FZI), University Medical Center, Johannes Gutenberg University Mainz, Mainz, Germany
| | - Andreas J. Müller
- Experimental Immunodynamics, Institute of Molecular and Clinical Immunology, Medical Faculty, and
- Health Campus Immunology, Infectiology and Inflammation (GCI3), Medical Faculty and Center for Health and Medical Prevention (CHaMP), Otto von Guericke University Magdeburg, Magdeburg, Germany
- Helmholtz Centre for Infection Research, Braunschweig, Germany
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12
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Mirzaee F, Faridnia R, Fakhar M, Kalani H, Shahani S. In Vitro Anti-Leishmanial Activity of Glucosinolate Fraction from Alyssum linifolium Steph. ex Willd (Brassicaceae). Turk J Pharm Sci 2023; 20:16-22. [PMID: 36862022 PMCID: PMC9986943 DOI: 10.4274/tjps.galenos.2022.78027] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
Objectives The intracellular parasitic protozoan, Leishmania spp., causes several forms of diseases in humans. Cytotoxicity and emergence of new strains resistance to the current anti-leishmanial drugs have encouraged researchers to focus on new resources. Glucosinolates (GSL) are found mainly in the Brassicaceae family with potential cytotoxic and anti-parasitic properties. The present study reports in vitro antileishmanial activity of the GSL fraction from Alyssum linifolium seeds against Leishmania major. Materials and Methods The GSL fraction was prepared by ion-exchange and reversed-phase chromatography. For the assessment of antileishmanial activity, the promastigotes and amastigotes of L. major were treated with different concentrations of the fraction (75-625 μg/mL). Results The IC50 was 245 µg/mL for anti-promastigote effect of the GSL fraction and 250 µg/mL for its anti-amastigote effect that had a significant difference (p<0.05) with both glucantime and amphotericin B. The selectivity index of the GSL fraction (15.8), to glucantime and amphotericin B, was greater than 10, indicating the selective effect of this fraction against L. major amastigotes. Glucoiberverin was the major constituent of the GSL fraction characterized using nuclear magnetic resonance and electron ionization-mass spectrometry spectra. Based on gas chromatography-mass spectrometry data, iberverin and iberverin nitrile, the hydrolysis constituents from glucoiberverin, included 76.91% of the total seed volatiles. Conclusion The results suggest that GSLs like glucoiberverin could be considered a new promising candidate for further studies on antileishmanial activity.
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Affiliation(s)
- Fatemeh Mirzaee
- Mazandaran University of Medical Sciences, Medicinal Plants Research Center, Sari, Iran
| | - Roghiyeh Faridnia
- Golestan University of Medical Sciences, Laboratory Sciences Research Center, Gorgan, Iran
| | - Mahdi Fakhar
- Mazandaran University of Medical Sciences, Imam Khomeini Hospital, Iranian National Registry Center for Lophomoniasis and Toxoplasmosis, Sari, Iran
| | - Hamed Kalani
- Golestan University of Medical Sciences, Infectious Diseases Research Center, Gorgan, Iran
| | - Somayeh Shahani
- Mazandaran University of Medical Sciences, Medicinal Plants Research Center, Sari, Iran.,Mazandaran University of Medical Sciences, Faculty of Pharmacy, Department of Pharmacognosy and Biotechnology, Sari, Iran
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13
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Mahor H, Mukherjee A, Sarkar A, Saha B. Anti-leishmanial therapy: Caught between drugs and immune targets. Exp Parasitol 2023; 245:108441. [PMID: 36572088 DOI: 10.1016/j.exppara.2022.108441] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2022] [Revised: 08/12/2022] [Accepted: 12/01/2022] [Indexed: 12/24/2022]
Abstract
Leishmaniasis is an enigmatic disease that has very restricted options for chemotherapy and none for prophylaxis. As a result, deriving therapeutic principles for curing the disease has been a major objective in Leishmania research for a long time. Leishmania is a protozoan parasite that lives within macrophages by subverting or switching cell signaling to the pathways that ensure its intracellular survival. Therefore, three groups of molecules aimed at blocking or eliminating the parasite, at least, in principle, include blockers of macrophage receptor- Leishmania ligand interaction, macrophage-activating small molecules, peptides and cytokines, and signaling inhibitors or activators. Macrophages also act as an antigen-presenting cell, presenting antigen to the antigen-specific T cells to induce activation and differentiation of the effector T cell subsets that either execute or suppress anti-leishmanial functions. Three groups of therapeutic principles targeting this sphere of Leishmania-macrophage interaction include antibodies that block pro-leishmanial response of T cells, ligands that activate anti-leishmanial T cells and the antigens for therapeutic vaccines. Besides these, prophylactic vaccines have been in clinical trials but none has succeeded so far. Herein, we have attempted to encompass all these principles and compose a comprehensive review to analyze the feasibility and adoptability of different therapeutics for leishmaniasis.
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Affiliation(s)
- Hima Mahor
- National Centre for Cell Science, Ganeshkhind, Pune, 411007, India
| | - Arka Mukherjee
- Trident Academy of Creative Technology, Bhubaneswar, 751024, Odisha, India
| | - Arup Sarkar
- Trident Academy of Creative Technology, Bhubaneswar, 751024, Odisha, India
| | - Bhaskar Saha
- National Centre for Cell Science, Ganeshkhind, Pune, 411007, India; Trident Academy of Creative Technology, Bhubaneswar, 751024, Odisha, India.
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14
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A Novel Role of Secretory Cytosolic Tryparedoxin Peroxidase in Delaying Apoptosis of Leishmania-Infected Macrophages. Mol Cell Biol 2022; 42:e0008122. [PMID: 36073913 PMCID: PMC9583715 DOI: 10.1128/mcb.00081-22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
The cytosolic tryparedoxin peroxidase (cTXNPx) of Leishmania donovani is a defensive enzyme. Apart from the nonsecretory form, the cTXNPx is released in the spent media of Leishmania cultures and also in the host cell cytosol. The secretory form of the enzyme from the parasite interacts with multiple proteins in the host cell cytosol, the apoptosis-inducing factor (AIF) being one of them. Immunoprecipitation with anti-cTXNPx and anti-AIF antibodies suggests a strong interaction between AIF and cTXNPx. Consequent to parasite invasion, the migration of AIF to the nucleus to precipitate apoptosis is inhibited in the presence of recombinant cTXNPx expressed in the host cell. This inhibition of AIF movement results in lesser host cell death, giving an advantage to the parasite for continued survival. Staurosporine-induced AIF migration to the nucleus was also inhibited in the presence of recombinant cTXNPx in the host cell. Therefore, this study demonstrates the ability of a Leishmania parasite enzyme, cTXNPx, to interfere with the migration of the host AIF protein, providing a survival advantage to the Leishmania parasite.
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15
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Gupta AK, Das S, Kamran M, Ejazi SA, Ali N. The Pathogenicity and Virulence of Leishmania - interplay of virulence factors with host defenses. Virulence 2022; 13:903-935. [PMID: 35531875 PMCID: PMC9154802 DOI: 10.1080/21505594.2022.2074130] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
Abstract
Leishmaniasis is a group of disease caused by the intracellular protozoan parasite of the genus Leishmania. Infection by different species of Leishmania results in various host immune responses, which usually lead to parasite clearance and may also contribute to pathogenesis and, hence, increasing the complexity of the disease. Interestingly, the parasite tends to reside within the unfriendly environment of the macrophages and has evolved various survival strategies to evade or modulate host immune defense. This can be attributed to the array of virulence factors of the vicious parasite, which target important host functioning and machineries. This review encompasses a holistic overview of leishmanial virulence factors, their role in assisting parasite-mediated evasion of host defense weaponries, and modulating epigenetic landscapes of host immune regulatory genes. Furthermore, the review also discusses the diagnostic potential of various leishmanial virulence factors and the advent of immunomodulators as futuristic antileishmanial drug therapy.
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Affiliation(s)
- Anand Kumar Gupta
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
| | - Sonali Das
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
| | - Mohd Kamran
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
| | - Sarfaraz Ahmad Ejazi
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
| | - Nahid Ali
- Infectious Diseases and Immunology Division, CSIR-Indian Institute of Chemical Biology, Kolkata 700032, India
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16
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Rodríguez-González J, Wilkins-Rodríguez AA, Gutiérrez-Kobeh L. Involvement of Akt and the antiapoptotic protein Bcl-xL in the inhibition of apoptosis of dendritic cells by Leishmania mexicana. Parasite Immunol 2022; 44:e12917. [PMID: 35340042 DOI: 10.1111/pim.12917] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Revised: 03/21/2022] [Accepted: 03/23/2022] [Indexed: 11/29/2022]
Abstract
The intracellular parasite Leishmania mexicana inhibits camptothecin (CPT)-induced apoptosis of monocyte-derived dendritic cells (moDC) through the down-regulation of p38 and JNK phosphorylation, while the kinase Akt is maintained active for 24 hours. In addition, the infection of moDC with L. mexicana promastigotes increases the protein presence of the antiapoptotic protein Bcl-xL. In the present work we aimed to investigate the role of Akt in the inhibition of apoptosis of moDC by L. mexicana and in the modulation of the expression of the antiapoptotic proteins Bcl-2, Mcl-1, and Bcl-xL. moDC were infected with L. mexicana metacyclic promastigotes and treated with CPT, an Akt inhibitor, or both and the MOMP and protein presence of active caspase 3, Bcl-2, Mcl-1, and Bcl-xL were evaluated. Our results show that the specific inhibition of Akt reverts the apoptosis protective effect exerted by L. mexicana on moDC reflected by a reduction in MOMP, caspase 3 activation, and upregulation of Bcl-xL. Interestingly, we also found that the infection of moDC with L. mexicana promastigotes induces a decrease in Bcl-2 along with an isoform change of Mcl-1, this independently to Akt activity. We demonstrated that Akt is deeply involved in the inhibition of apoptosis of moDC by L. mexicana.
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Affiliation(s)
- Jorge Rodríguez-González
- Unidad de Investigación UNAM-INC, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México.,Posgrado en Ciencias Biológicas, Facultad de Medicina, Unidad de Posgrado, Ciudad Universitaria, Ciudad de México, México
| | - Arturo A Wilkins-Rodríguez
- Unidad de Investigación UNAM-INC, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
| | - Laila Gutiérrez-Kobeh
- Unidad de Investigación UNAM-INC, División de Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México. Ciudad de México, México
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17
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Das S, Saha T, Shaha C. Tissue/Biofluid Specific Molecular Cartography of Leishmania donovani Infected BALB/c Mice: Deciphering Systemic Reprogramming. Front Cell Infect Microbiol 2021; 11:694470. [PMID: 34395309 PMCID: PMC8358651 DOI: 10.3389/fcimb.2021.694470] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Accepted: 06/30/2021] [Indexed: 12/12/2022] Open
Abstract
Pathophysiology of visceral leishmaniasis (VL) is not fully understood and it has been widely accepted that the parasitic components and host immune response both contribute to the perpetuation of the disease. Host alterations during leishmaniasis is a feebly touched area that needs to be explored more to better understand the VL prognosis and diagnosis, which are vital to reduce mortality and post-infection sequelae. To address this, we performed untargeted metabolomics of Leishmania donovani (Ld) infected, uninfected and treated BALB/c mice’s tissues and biofluids to elucidate the host metabolome changes using gas chromatography–mass spectrometry. Univariate and multivariate data treatments provided numerous significant differential hits in several tissues like the brain, liver, spleen and bone marrow. Differential modulations were also observed in serum, urine and fecal samples of Ld-infected mice, which could be further targeted for biomarker and diagnostic validations. Several metabolic pathways were found to be upregulated/downregulated in infected (TCA, glycolysis, fatty acids, purine and pyrimidine, etcetera) and treated (arginine, fumaric acid, orotic acid, choline succinate, etcetera) samples. Results also illustrated several metabolites with different pattern of modulations in control, infected and treated samples as well as in different tissues/biofluids; for e.g. glutamic acid identified in the serum samples of infected mice. Identified metabolites include a range of amino acids, saccharides, energy-related molecules, etcetera. Furthermore, potential biomarkers have been identified in various tissues—arginine and fumaric acid in brain, choline in liver, 9-(10) EpOME in spleen and bone marrow, N-acetyl putrescine in bone marrow, etcetera. Among biofluids, glutamic acid in serum, hydrazine and deoxyribose in urine and 3-Methyl-2-oxo pentanoic acid in feces are some of the potential biomarkers identified. These metabolites could be further looked into for their role in disease complexity or as a prognostic marker. The presented profiling approach allowed us to attain a metabolic portrait of the individual tissue/biofluid modulations during VL in the host and represent a valuable system readout for further studies. Our outcomes provide an improved understanding of perturbations of the host metabolome interface during VL, including identification of many possible potential diagnostic and therapeutic targets.
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Affiliation(s)
- Sanchita Das
- Cell Death and Differentiation Laboratory, National Institute of Immunology, New Delhi, India
| | - Tanaya Saha
- Cell Death and Differentiation Laboratory, National Institute of Immunology, New Delhi, India
| | - Chandrima Shaha
- Cell Death and Differentiation Laboratory, National Institute of Immunology, New Delhi, India
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18
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Thapa R, Mondal S, Riikonen J, Rantanen J, Näkki S, Nissinen T, Närvänen A, Lehto VP. Biogenic nanoporous silicon carrier improves the efficacy of buparvaquone against resistant visceral leishmaniasis. PLoS Negl Trop Dis 2021; 15:e0009533. [PMID: 34185780 PMCID: PMC8274846 DOI: 10.1371/journal.pntd.0009533] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2020] [Revised: 07/12/2021] [Accepted: 06/02/2021] [Indexed: 12/05/2022] Open
Abstract
Visceral leishmaniasis is a vector-borne protozoan infection that is fatal if untreated. There is no vaccination against the disease, and the current chemotherapeutic agents are ineffective due to increased resistance and severe side effects. Buparvaquone is a potential drug against the leishmaniases, but it is highly hydrophobic resulting in poor bioavailability and low therapeutic efficacy. Herein, we loaded the drug into silicon nanoparticles produced from barley husk, which is an agricultural residue and widely available. The buparvaquone-loaded nanoparticles were several times more selective to kill the intracellular parasites being non-toxic to macrophages compared to the pure buparvaquone and other conventionally used anti-leishmanial agents. Furthermore, the in vivo results revealed that the intraperitoneally injected buparvaquone-loaded nanoparticles suppressed the parasite burden close to 100%. By contrast, pure buparvaquone suppressed the burden only by 50% with corresponding doses. As the conclusion, the biogenic silicon nanoparticles are promising carriers to significantly improve the therapeutic efficacy and selectivity of buparvaquone against resistant visceral leishmaniasis opening a new avenue for low-cost treatment against this neglected tropical disease threatening especially the poor people in developing nations.
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Affiliation(s)
- Rinez Thapa
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Subhasish Mondal
- School of Pharmacy, The Neotia University, Sarisa, West Bengal, India
| | - Joakim Riikonen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Jimi Rantanen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Simo Näkki
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Tuomo Nissinen
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
| | - Ale Närvänen
- School of Pharmacy, University of Eastern Finland, Kuopio, Finland
| | - Vesa-Pekka Lehto
- Department of Applied Physics, University of Eastern Finland, Kuopio, Finland
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19
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Solano-Gálvez SG, Álvarez-Hernández DA, Gutiérrez-Kobeh L, Vázquez-López R. Leishmania: manipulation of signaling pathways to inhibit host cell apoptosis. Ther Adv Infect Dis 2021; 8:20499361211014977. [PMID: 34104433 PMCID: PMC8165860 DOI: 10.1177/20499361211014977] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2020] [Accepted: 04/13/2021] [Indexed: 11/17/2022] Open
Abstract
The maintenance of homeostasis in living systems requires the elimination of unwanted cells which is performed, among other mechanisms, by type I cell death or apoptosis. This type of programmed cell death involves several morphological changes such as cytoplasm shrinkage, chromatin condensation (pyknosis), nuclear fragmentation (karyorrhexis), and plasma membrane blebbing that culminate with the formation of apoptotic bodies. In addition to the maintenance of homeostasis, apoptosis also represents an important defense mechanism for cells against intracellular microorganisms. In counterpart, diverse intracellular pathogens have developed a wide array of strategies to evade apoptosis and persist inside cells. These strategies include the manipulation of signaling pathways involved in the inhibition of apoptosis where mitogen-activated protein kinase (MAPK) and phosphoinositide 3-kinase (PI3K) play a key role. Leishmania is an intracellular protozoan parasite that causes a wide spectrum of diseases known as leishmaniasis. This parasite displays different strategies, including apoptosis inhibition, to down-regulate host cell defense mechanisms in order to perpetuate infection.
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Affiliation(s)
- Sandra-Georgina Solano-Gálvez
- Unidad de Investigación UNAM-INC, División Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Instituto Nacional de Cardiología, Mexico City, Mexico
| | - Diego-Abelardo Álvarez-Hernández
- Departamento de Microbiología, Centro de Investigación en Ciencias de la Salud, CICSA Facultad de Ciencias de la Salud, Universidad Anáhuac México Campus Norte, Huixquilucán Estado de México, México
- Faculty of Infectious and Tropical Diseases, London School of Hygiene & Tropical Medicine, Bloomsbury, London, UK
| | - Laila Gutiérrez-Kobeh
- Unidad de Investigación UNAM-INC, División Investigación, Facultad de Medicina, Universidad Nacional Autónoma de México, Instituto Nacional de Cardiología, Mexico City, Mexico
| | - Rosalino Vázquez-López
- Departamento de Microbiología, Centro de Investigación en Ciencias de la Salud, Facultad de Ciencias de la Salud, Universidad Anáhuac México Campus Norte, Av. Universidad Anáhuac 46, Col. Lomas Anáhuac, Huixquilucán Estado de México, Naucalpan, 52786, México
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20
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Pitale DM, Kaur G, Baghel M, Kaur KJ, Shaha C. Halictine-2 antimicrobial peptide shows promising anti-parasitic activity against Leishmania spp. Exp Parasitol 2020; 218:107987. [PMID: 32891601 DOI: 10.1016/j.exppara.2020.107987] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 08/19/2020] [Accepted: 08/30/2020] [Indexed: 12/27/2022]
Abstract
The protozoan parasite Leishmania spp. causes leishmaniases, a group of diseases creating serious health problems in many parts of the world with significant resistance to existing drugs. Insect derived antimicrobial peptides are promising alternatives to conventional drugs against several human disease-causing pathogens because they do not generate resistance. Halictine-2, a novel antimicrobial peptide from the venom of eusocial honeybee, Halictus sexcinctus showed significant anti-leishmanial activity in vitro, towards two life forms of the dimorphic parasite, the free-swimming infective metacyclic promastigotes and the intracellular amastigotes responsible for the systemic infection. The anti-leishmanial activity of the native peptide (P5S) was significantly enhanced by serine to threonine substitution at position 5 (P5T). The peptide showed a propensity to form α-helices after substitution at position-5, conferring amphipathicity. Distinct pores observed on the promastigote membrane after P5T exposure suggested a mechanism of disruption of cellular integrity. Biochemical alterations in the promastigotes after P5T exposure included generation of increased oxygen radicals with mitochondrial Ca2+ release, loss of mitochondrial membrane potential, reduction in total ATP content and increased mitochondrial mass, resulting in quick bioenergetic and chemiosmotic collapse leading to cell death characterized by DNA fragmentation. P5T was able to reduce intracellular amastigote burden in an in vitro model of Leishmania infection but did not alter the proinflammatory cytokines like TNF-α and IL-6. The ability of the P5T peptide to kill the Leishmania parasite with negligible haemolytic activity towards mouse macrophages and human erythrocytes respectively, demonstrates its potential to be considered as a future antileishmanial drug candidate.
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Affiliation(s)
- Durgesh Manohar Pitale
- Cell Death and Differentiation Research Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Gagandeep Kaur
- Structural Biology Unit, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Madhu Baghel
- Metabolic Research Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India
| | - Kanwal J Kaur
- Structural Biology Unit, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
| | - Chandrima Shaha
- Cell Death and Differentiation Research Laboratory, National Institute of Immunology, Aruna Asaf Ali Marg, New Delhi, 110067, India.
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21
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Paik D, Pramanik PK, Chakraborti T. Curative efficacy of purified serine protease inhibitor PTF3 from potato tuber in experimental visceral leishmaniasis. Int Immunopharmacol 2020; 85:106623. [PMID: 32504996 DOI: 10.1016/j.intimp.2020.106623] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2020] [Revised: 05/04/2020] [Accepted: 05/18/2020] [Indexed: 10/24/2022]
Abstract
To overcome the drug toxicity and frequent resistance of parasites against the conventional drugs for the healing of human visceral leishmaniasis, innovative plant derived antileishmanial components are very imperative. Fuelled by the complications of clinically available antileishmanial drugs, a novel potato serine protease inhibitor was identified with its efficacy on experimental visceral leishmaniasis (VL). The serine protease inhibitors from potato tuber extract (PTEx) bearing molecular mass of 39 kDa (PTF1), 23 kDa (PTF2) and 17 kDa (PTF3) were purified and identified. Among them, PTF3 was selected as the most active inhibitor (IC50 143.5 ± 2.4 µg/ml) regarding its antileishmanial property. Again, intracellular amastigote load was reduced upto 83.1 ± 1.7% in pre-treated parasite and 88.5 ± 0.5% in in vivo model with effective dose of PTF3. Protective immune response by PTF3 was noted with increased production of antimicrobial substances and up-regulation of pro-inflammatory cytokines. Therapeutic potency of PTF3 is also followed by 80% survival in infected hamster. The peptide mass fingerprint (MALDI-TOF) results showed similarity of PTF3 with serine protease inhibitors database. Altogether, these results strongly propose the effectiveness of PTF3 as potent immunomodulatory therapeutics for controlling VL.
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Affiliation(s)
- Dibyendu Paik
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani 741235, West Bengal, India
| | - Pijush Kanti Pramanik
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani 741235, West Bengal, India
| | - Tapati Chakraborti
- Department of Biochemistry and Biophysics, University of Kalyani, Kalyani 741235, West Bengal, India.
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Han IH, Song HO, Ryu JS. IL-6 produced by prostate epithelial cells stimulated with Trichomonas vaginalis promotes proliferation of prostate cancer cells by inducing M2 polarization of THP-1-derived macrophages. PLoS Negl Trop Dis 2020; 14:e0008126. [PMID: 32196489 PMCID: PMC7138318 DOI: 10.1371/journal.pntd.0008126] [Citation(s) in RCA: 49] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Revised: 04/07/2020] [Accepted: 02/10/2020] [Indexed: 12/12/2022] Open
Abstract
Trichomonas vaginalis (Tv), a protozoan parasite causing sexually-transmitted disease, has been detected in tissue of prostatitis, benign prostatic hyperplasia (BPH) and prostate cancer (PCa). IL-6, a mediator of chronic inflammation, induces the progression of prostate cancer, and influences the polarization of M2 macrophages, which are the main tumor-associated macrophages. We investigated whether IL-6 produced by human prostate epithelial cells stimulated with Tv induces the M2 polarization of THP-1-derived macrophages, which in turn promotes the progression of PCa. Conditioned medium was prepared from Tv-infected (TCM) and uninfected (CM) prostate epithelial cells (RWPE-1). Thereafter conditioned medium was prepared from macrophages after incubation with CM (M-CM) or TCM (M-TCM). RWPE-1 cells infected with Tv produced IL-6 and chemokines such as CCL2 and CXCL8. When human macrophages were treated with conditioned medium of RWPE-1 cells co-cultured with Tv (TCM), they became polarized to M2-like macrophages as indicated by the production of IL-10 and TGF-β, and the expression of CD36 and arginase-1, which are M2 macrophage markers. Moreover, proliferation of the M2-like macrophages was also increased by TCM. Blockade of IL-6 signaling with IL-6 receptor antibody and JAK inhibitor (Ruxolitinib) inhibited M2 polarization of THP-1-derived macrophages and proliferation of the macrophages. To assess the effect of crosstalk between macrophages and prostate epithelial cells inflamed by Tv infection on the growth of prostate cancer (PCa) cells, PC3, DU145 and LNCaP cells were treated with conditioned medium from THP-1-derived macrophages stimulated with TCM (M-TCM). Proliferation and migration of the PCa cells were significantly increased by the M-TCM. Our findings suggest that IL-6 produced in response to Tv infection of the prostate has an important effect on the tumor microenvironment by promoting progression of PCa cells following induction of M2 macrophage polarization. In male, T. vaginalis infection have been proposed to involve in several prostate diseases such as prostatitis, benign prostatic hyperplasia and prostate cancer. However, studies for these mechanisms have been rare. We have previously reported that T. vaginalis induce the production of inflammatory cytokines in prostate cells. Among these cytokines, IL-6 have been reported to play an important role in M2 macrophage polarization, which lead to formation of tumor microenvironment in various cancers. Here we show that IL-6 produced by T. vaginalis infection in prostate epithelial cells induces M2 polarization of macrophages and these macrophages promote proliferation of prostate cancer cells. These findings suggest that T. vaginalis indirectly induces progression of prostate cancer by creating a tumor microenvironment through an inflammatory response.
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Affiliation(s)
- Ik-Hwan Han
- Department of Environmental Biology and Medical Parasitology, Hanyang University College of Medicine, Seoul, Korea
| | - Hyun-Ouk Song
- Department of Parasitology, School of Medicine, Catholic University of Daegu, Daegu, Korea
| | - Jae-Sook Ryu
- Department of Environmental Biology and Medical Parasitology, Hanyang University College of Medicine, Seoul, Korea
- * E-mail:
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23
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de Oliveira VVG, Aranda de Souza MA, Cavalcanti RRM, de Oliveira Cardoso MV, Leite ACL, da Silva Junior VA, de Figueiredo RCBQ. Study of in vitro biological activity of thiazoles on Leishmania (Leishmania) infantum. J Glob Antimicrob Resist 2020; 22:414-421. [PMID: 32165288 DOI: 10.1016/j.jgar.2020.02.028] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2019] [Revised: 12/18/2019] [Accepted: 02/22/2020] [Indexed: 01/13/2023] Open
Abstract
OBJECTIVES In the prospection of possible agents against neglected diseases, thiazole compounds are presented as promising candidates and are known to have activity against trypanosomatid parasites. Thus, this work aimed to evaluate the effects of thiazole compounds on Leishmania infantum, the aetiological agent of visceral leishmaniasis. METHODS Thiazole compounds (five thiazoacetylpyridines [TAPs-01, -04, -05, -06, -09) and five thiazopyridines [TPs-01, -04, -05, -06, -09]) were tested regarding their leishmanicidal activity on both promastigote and amastigote forms of L. infantum. Cytotoxicity was tested using peritoneal macrophages of BALB/c mice. Ultrastructural analyses were performed to identify possible intracellular targets of the most effective compound on promastigote forms. To observe routes that can clarify the possible mechanism of action of the compounds on the intracellular amastigote forms, the nitrite dosage was performed. RESULTS All compounds inhibited the growth of promastigote and presented low cytotoxicity, being more selective to the parasite than to mammalian cells. All compounds tested were able to decrease macrophage infection. There was a significant decrease in the survival rate of the amastigote when compared with the untreated cells, with TAP-04 presenting the best index. TAP-04 induced ultrastructural changes that are related to cell death by apoptosis. None of the macrophage groups infected with L. infantum and subsequently treated showed increased nitrite release. CONCLUSIONS The low toxicity to mammalian cells and the leishmanicidal activity observed demonstrate that the synthesis of drugs based in thiosemicarbazone nucleus, thiazole and pyridine derivatives are promising for the treatment of visceral leishmaniasis.
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Affiliation(s)
- Vinícius Vasconcelos Gomes de Oliveira
- Departamento de Morfologia e Fisiologia Animal, Universidade Federal Rural de Pernambuco (UFRPE), Recife, Brazil; Centro Acadêmico de Vitória, Universidade Federal de Pernambuco (UFPE), Vitória de Santo Antão, Brazil.
| | - Mary Angela Aranda de Souza
- Departamento de Microbiologia, Centro de Pesquisas Aggeu Magalhães, Universidade Federal de Pernambuco (UFPE), Recife, Brazil
| | | | | | - Ana Cristina Lima Leite
- Departamento de Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Pernambuco, Recife, Brazil
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Negrão F, Fernandez-Costa C, Zorgi N, Giorgio S, Nogueira Eberlin M, Yates JR. Label-Free Proteomic Analysis Reveals Parasite-Specific Protein Alterations in Macrophages Following Leishmania amazonensis, Leishmania major, or Leishmania infantum Infection. ACS Infect Dis 2019; 5:851-862. [PMID: 30978002 DOI: 10.1021/acsinfecdis.8b00338] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Leishmania is an obligate intracellular parasite known to modulate the host cell to survive and proliferate. However, the complexity of host-parasite interactions remains unclear. Also, the outcome of the disease has been recognized to be species-specific and dependent on the host's immune responses. Proteomics has emerged as a powerful tool to investigate the host-pathogen interface, allowing us to deepen our knowledge about infectious diseases. Quantification of the relative amount of proteins in a sample can be achieved using label-free proteomics, and for the first time, we have used it to quantify Leishmania-specific protein alterations in macrophages. Protein extracts were obtained and digested, and peptides were identified and quantified using nano-LC coupled with tandem mass spectrometry analyses. Protein expression was validated by Western blot analysis. Integrated Proteomics Pipeline was used for peptide/protein identification and for quantification and data processing. Ingenuity Pathway Analysis was used for network analysis. In this work, we investigated how this intracellular parasite modulates protein expression on a host macrophage by comparing three different Leishmania species- L. amazonensis, one of the causative agents of cutaneous disease in the Amazon region; L. major, another causative agent of cutaneous leishmaniasis in Africa, the Middle East, China, and India; L. infantum, the causative agent of visceral leishmaniasis affecting humans and dogs in Latin America-and lipopolysaccharide stimulated macrophages as an in vitro inflammation model. Our results revealed that Leishmania infection downregulates apoptosis pathways while upregulating the activation of phagocytes/leukocytes and lipid accumulation.
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Affiliation(s)
- Fernanda Negrão
- Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road, SR302, La Jolla, California 92037, United States
- Department of Animal Biology, Institute of Biology, Rua Monteiro Lobato, 255, Campinas, Sao Paulo 13083-862, Brazil
- Department of Organic Chemistry, Institute of Chemistry, UNICAMP, Rua Josué de Castro SN, Room A111, Campinas, Sao Paulo 13083-862, Brazil
| | - Carolina Fernandez-Costa
- Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road, SR302, La Jolla, California 92037, United States
| | - Nahiara Zorgi
- Department of Animal Biology, Institute of Biology, Rua Monteiro Lobato, 255, Campinas, Sao Paulo 13083-862, Brazil
| | - Selma Giorgio
- Department of Animal Biology, Institute of Biology, Rua Monteiro Lobato, 255, Campinas, Sao Paulo 13083-862, Brazil
| | - Marcos Nogueira Eberlin
- Department of Organic Chemistry, Institute of Chemistry, UNICAMP, Rua Josué de Castro SN, Room A111, Campinas, Sao Paulo 13083-862, Brazil
| | - John R. Yates
- Department of Chemical Physiology, The Scripps Research Institute, 10550 North Torrey Pines Road, SR302, La Jolla, California 92037, United States
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Pitale DM, Gendalur NS, Descoteaux A, Shaha C. Leishmania donovani Induces Autophagy in Human Blood–Derived Neutrophils. THE JOURNAL OF IMMUNOLOGY 2019; 202:1163-1175. [DOI: 10.4049/jimmunol.1801053] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/31/2018] [Accepted: 12/10/2018] [Indexed: 12/19/2022]
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Saha A, Basu M, Ukil A. Recent advances in understanding Leishmania donovani
infection: The importance of diverse host regulatory pathways. IUBMB Life 2018; 70:593-601. [PMID: 29684241 DOI: 10.1002/iub.1759] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 04/02/2018] [Indexed: 02/03/2023]
Affiliation(s)
- Amrita Saha
- Department of Biochemistry; University of Calcutta; Kolkata West Bengal India
| | - Moumita Basu
- Department of Biochemistry; University of Calcutta; Kolkata West Bengal India
| | - Anindita Ukil
- Department of Biochemistry; University of Calcutta; Kolkata West Bengal India
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Functional Involvement of Leishmania donovani Tryparedoxin Peroxidases during Infection and Drug Treatment. Antimicrob Agents Chemother 2017; 62:AAC.00806-17. [PMID: 29061756 DOI: 10.1128/aac.00806-17] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2017] [Accepted: 10/18/2017] [Indexed: 01/22/2023] Open
Abstract
The parasite Leishmania donovani causes visceral leishmaniasis, a potentially fatal disease. The parasites survive within mammalian macrophages and express a unique set of enzymes, the tryparedoxin peroxidases, for their defense against oxidative stress generated by the host. In this study, we demonstrate different roles of two distinct enzymes, the mitochondrial tryparedoxin peroxidase (mTXNPx) and the cytosolic tryparedoxin peroxidase (cTXNPx), in defending the parasites against mitochondrial and exogenous oxidative stress during infection and drug treatment. Our findings indicate a greater increase in cTXNPx expression in response to exogenous oxidative stress and a higher elevation of mTXNPx expression in response to mitochondrial or endogenous stress created by respiratory chain complex inhibitors. Overexpression of cTXNPx in Leishmania showed improved protection against exogenous stress and enhanced protection against mitochondrial stress in parasites overexpressing mTXNPx. Further, parasites overexpressing cTXNPx infected host cells with increased efficiency at early times of infection compared to control parasites or parasites overexpressing mTXNPx. The mTXNPx-overexpressing parasites maintained higher infection at later times. Higher mTXNPx expression occurred in wild-type parasites on exposure to miltefosine, while treatment with antimony elevated cTXNPx expression. Parasites resistant to miltefosine or antimony demonstrated increased expression of mTXNPx, as well as cTXNPx. In summary, this study provides evidence of distinct roles of the two enzymes defined by virtue of their localization during infection and drug treatment.
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Resistance to apoptosis in Leishmania infantum-infected human macrophages: a critical role for anti-apoptotic Bcl-2 protein and cellular IAP1/2. Clin Exp Med 2017; 18:251-261. [PMID: 29218444 DOI: 10.1007/s10238-017-0482-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2017] [Accepted: 11/30/2017] [Indexed: 12/18/2022]
Abstract
Apoptosis is essential for maintaining tissue homoeostasis in multi-cellular organisms, also occurring as a defence mechanism against a number of infectious agents, such as parasites. Among intracellular protozoan parasites reported to interfere with the apoptotic machinery of the host cell, Leishmania (L.) sp. have been described, although the various species might activate different pathways in their host cells. Since until now it is not yet well clarified the signalling pathway involved in the apoptosis modulation by L. infantum, the aim of this work was to investigate the role of the anti-apoptotic protein, Bcl-2, and the inhibitors of apoptosis IAP1/2 (cIAP1/2) in cell death resistance showed in L. infantum-infected human macrophages. We observed that actinomycin D-induced apoptosis in U-937 cells, evaluated by Annexin V-CY3, DNA fragmentation and caspase-3, caspase-8, caspase-9 activation assays, was inhibited in the presence of L. infantum promastigotes and that, in these conditions, Bcl-2 protein expression resulted significantly upregulated. Interestingly, L. infantum infection in combination with the Bcl-2 inhibitor, ABT-737, significantly increased the apoptotic process in actinomycin D-treated cells, suggesting a role for Bcl-2 in the anti-apoptotic regulation of human macrophages induced by L. infantum infection. Moreover, Western blotting analysis demonstrated not only a significantly upregulation of cIAP1/2 in infected U-937 cells, but also that the inhibition of cIAPs, employing specific siRNAs, restored the apoptotic effect of actinomycin in infected macrophages. These results clearly support the hypothesis that Bcl-2 and cIAPs are strongly involved in the anti-apoptotic action played by L. infantum in human macrophages.
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da Silva MV, Ferreira França FB, Mota CM, de Macedo Júnior AG, Ramos ELP, Santiago FM, Mineo JR, Mineo TWP. Dectin-1 Compromises Innate Responses and Host Resistance against Neospora caninum Infection. Front Immunol 2017; 8:245. [PMID: 28326085 PMCID: PMC5339258 DOI: 10.3389/fimmu.2017.00245] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2016] [Accepted: 02/20/2017] [Indexed: 12/29/2022] Open
Abstract
Neospora caninum is an intracellular protozoan parasite that has drawn increasing interest due to its association with worldwide repetitive bovine abortions, which cause billionaire losses to the meat and dairy industries annually. Innate immunity plays an important role in infection control, and N. caninum activates the production of inflammatory mediators through toll-like receptors, NOD-like receptors, and mitogen-activated protein kinase signaling pathways. Advances in the knowledge of initial host–parasite interactions are desirable for the design of control measures against the infection, obliterating its pathogenesis. In that sense, we here aimed to describe the role of the innate C-type lectin receptor Dectin-1 during the infection by N. caninum. With that intent, we observed that the absence of Dectin-1, observed in genetically depleted (Dectin-1−/−) mice or competitively inhibited by an inert agonist [laminarin (LAM)], rescued 50% of the mice infected with lethal doses of N. caninum. Dectin-1−/− and LAM-treated mice also presented a reduction in the parasite load during acute and chronic phases, associated with decreased inflammatory scores in the central nervous system. Among all the cell phenotypes that migrated to the initial site of infection, dendritic cells and macrophages gained subpopulations with high Dectin-1 surface expression. The impairment of the receptor in these cells led to a decreased parasite burden, as well as augmented production of IL-12p40. We also found that Dectin-1+ cells produced less reactive oxygen species (ROS) at the initial site of the infection, while mice deficient in NADPH oxidase isoform 2 (NOX2−/−) were not able to control parasite replication and produce IL-12p40, even upon LAM treatment. Interestingly, the absence of functional Dectin-1 did not alter the susceptibility of mice against closely related Toxoplasma gondii. In conclusion, the gathered data suggest that Dectin-1 is involved in the parasite-induced downmodulation of ROS, and other key molecules triggered for the control of N. caninum infection and are a promising target for future development of protocols intended for intervention against neosporosis.
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Affiliation(s)
- Murilo Vieira da Silva
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - Flávia Batista Ferreira França
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - Caroline Martins Mota
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - Arlindo Gomes de Macedo Júnior
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - Eliézer Lucas Pires Ramos
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - Fernanda Maria Santiago
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - José Roberto Mineo
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
| | - Tiago Wilson Patriarca Mineo
- Laboratory of Immunoparasitology "Dr. Mário Endsfeldz Camargo", Department of Immunology, Institute of Biomedical Sciences, Federal University of Uberlândia , Uberlândia , Brazil
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