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Schwing A, Pisani DF, Pomares C, Majoor A, Lacas-Gervais S, Jager J, Lemichez E, Marty P, Boyer L, Michel G. Identification of adipocytes as target cells for Leishmania infantum parasites. Sci Rep 2021; 11:21275. [PMID: 34711872 PMCID: PMC8553825 DOI: 10.1038/s41598-021-00443-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2021] [Accepted: 09/29/2021] [Indexed: 11/30/2022] Open
Abstract
Leishmania infantum is the causative agent of visceral leishmaniasis transmitted by the bite of female sand flies. According to the WHO, the estimated annual incidence of leishmaniasis is one million new cases, resulting in 30,000 deaths per year. The recommended drugs for treating leishmaniasis include Amphotericin B. But over the course of the years, several cases of relapses have been documented. These relapses cast doubt on the efficiency of actual treatments and raise the question of potential persistence sites. Indeed, Leishmania has the ability to persist in humans for long periods of time and even after successful treatment. Several potential persistence sites have already been identified and named as safe targets. As adipose tissue has been proposed as a sanctuary of persistence for several pathogens, we investigated whether Leishmania infantum could be found in this tissue. We demonstrated both in cell cultures and in vivo that Leishmania infantum was able to infect adipocytes. Altogether our results suggest adipocytes as a 'safe target' for Leishmania infantum parasites.
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Affiliation(s)
- Aurélie Schwing
- Université Côte d'Azur, CHU, Inserm, C3M, Nice, France
- Université Côte d'Azur, Inserm, C3M, Nice, France
- Université Aix-Marseille, Marseille, France
| | | | - Christelle Pomares
- Université Côte d'Azur, CHU, Inserm, C3M, Nice, France
- Université Côte d'Azur, Inserm, C3M, Nice, France
| | | | | | | | - Emmanuel Lemichez
- Institut Pasteur, CNRS UMR2001, Unité des Toxines Bactériennes, 75015, Paris, France
| | - Pierre Marty
- Université Côte d'Azur, CHU, Inserm, C3M, Nice, France
- Université Côte d'Azur, Inserm, C3M, Nice, France
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Schwing A, Pomares C, Majoor A, Boyer L, Marty P, Michel G. Leishmania infection: Misdiagnosis as cancer and tumor-promoting potential. Acta Trop 2019; 197:104855. [PMID: 30529443 DOI: 10.1016/j.actatropica.2018.12.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2018] [Revised: 12/03/2018] [Accepted: 12/06/2018] [Indexed: 12/17/2022]
Abstract
Given the prevalence of cancer and leishmaniasis worldwide, the presence of these two pathologies in the same tissue sample may be merely fortuitous. The clinical outcome of both diseases is under the control of innate and adaptive immunity, and in both cases these progressive diseases are characterized by an impaired host Th1 response. As a consequence, the Th2 cytokine microenvironment occurring in progressive leishmaniasis may potentially promote tumor cell proliferation and vice versa. On the other hand, clinical aspects of subclinical cutaneous or visceral leishmaniasis sometimes closely resemble those observed in various neoplasms thus leading to misdiagnosis. In this review, we present recent findings on the association between leishmaniasis and malignant disorders. Our review includes HIV positive, HIV negative subjects and patients whose HIV status has not been established. Leishmaniasis mimicking a malignant disorder was confirmed and extended to unreported neoplastic disorders including squamous cell carcinoma, T-cell and B-cell lymphoma, oral and intranasal tumors and granulomas. Thus, leishmaniasis should be considered in the differential diagnosis and course of various cancers in Leishmania endemic areas or in patients with travel history to these areas. We also listed recent reports showing that Leishmania can promote cancer development in immunocompromised as well as in immunocompetent patients. The potential mechanisms supporting this promoting effect are discussed.
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Brakni R, Ali Ahmed M, Burger P, Schwing A, Michel G, Pomares C, Hasseine L, Boyer L, Fernandez X, Landreau A, Michel T. UHPLC-HRMS/MS Based Profiling of Algerian Lichens and Their Antimicrobial Activities. Chem Biodivers 2018; 15:e1800031. [PMID: 29505125 DOI: 10.1002/cbdv.201800031] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/26/2018] [Accepted: 03/01/2018] [Indexed: 12/29/2022]
Abstract
Lichens are complex symbiotic organisms able to produce a vast array of compounds. The Algerian lichen diversity has only prompted little interest even given the 1085 species listed. Herein, the chemodiversity of four Algerian lichens including Cladonia rangiformis, Ramalina farinaceae, R. fastigiata, and Roccella phycopsis was investigated. A dereplication strategy, using ultra high performance liquid chromatography-high resolution-electrospray ionization-mass spectrometry (UHPLC-HRMS/MS), was carried out for a comprehensive characterization of their substances including phenolics, depsides, depsidones, depsones, dibenzofurans, and aliphatic acids. Some known compounds were identified for the first time in some species. Additionally, the lichenic extracts were evaluated for their antifungal and antimicrobial activities on human pathogenic strains (Candida albicans, C. glabrata, Aspergillus fumigatus, Staphylococcus aureus, and Escherichia coli). Cyclohexane extracts were found particularly active against human pathogenic fungi with MIC80 values ranging from 8 to 62.5 μg/mL, without cytotoxicity. This study highlights the therapeutic and prophylactic potential of lichenic extracts as antibacterial and antifungal agents.
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Affiliation(s)
- Rafika Brakni
- Département de Biologie, Laboratoire de Biologie Végétale et Environnement, Université Badji-Mokhtar, BP 23000, Annaba, Algeria
| | - Monia Ali Ahmed
- Département de Biologie, Laboratoire de Biologie Végétale et Environnement, Université Badji-Mokhtar, BP 23000, Annaba, Algeria
| | - Pauline Burger
- Université Côte d'Azur, CNRS, Institut de Chimie de Nice, UMR 7272, Parc Valrose, 06108, Nice Cedex 2, France
| | - Aurélie Schwing
- Université Côte d'Azur, C3M Inserm, U1065, 06204, Nice Cedex 3, France
| | - Grégory Michel
- Université Côte d'Azur, C3M Inserm, U1065, 06204, Nice Cedex 3, France
| | - Christelle Pomares
- Université Côte d'Azur, C3M Inserm, U1065, 06204, Nice Cedex 3, France.,Service de Parasitologie-Mycologie, Centre Hospitalier Universitaire de Nice, 06202, Nice Cedex 3, France
| | - Lillia Hasseine
- Service de Parasitologie-Mycologie, Centre Hospitalier Universitaire de Nice, 06202, Nice Cedex 3, France
| | - Laurent Boyer
- Université Côte d'Azur, C3M Inserm, U1065, 06204, Nice Cedex 3, France.,Service de Parasitologie-Mycologie, Centre Hospitalier Universitaire de Nice, 06202, Nice Cedex 3, France
| | - Xavier Fernandez
- Université Côte d'Azur, CNRS, Institut de Chimie de Nice, UMR 7272, Parc Valrose, 06108, Nice Cedex 2, France
| | - Anne Landreau
- Université Côte d'Azur, CNRS, Institut de Chimie de Nice, UMR 7272, Parc Valrose, 06108, Nice Cedex 2, France.,Université d'Angers, Université Bretagne - Loire, Faculté de santé, Département pharmacie, 16 bd Daviers, 49045, Angers cedex 01, France
| | - Thomas Michel
- Université Côte d'Azur, CNRS, Institut de Chimie de Nice, UMR 7272, Parc Valrose, 06108, Nice Cedex 2, France
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