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Rodriguez Rodrigues C, Remes Lenicov F, Jancic C, Sabatté J, Cabrini M, Ceballos A, Merlotti A, Gonzalez H, Ostrowski M, Geffner J. Candida albicans delays HIV-1 replication in macrophages. PLoS One 2013; 8:e72814. [PMID: 24009706 PMCID: PMC3751824 DOI: 10.1371/journal.pone.0072814] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2013] [Accepted: 07/21/2013] [Indexed: 11/19/2022] Open
Abstract
Macrophages are one of the most important HIV-1 target cells. Unlike CD4(+) T cells, macrophages are resistant to the cytophatic effect of HIV-1. They are able to produce and harbor the virus for long periods acting as a viral reservoir. Candida albicans (CA) is a commensal fungus that colonizes the portals of HIV-1 entry, such as the vagina and the rectum, and becomes an aggressive pathogen in AIDS patients. In this study, we analyzed the ability of CA to modulate the course of HIV-1 infection in human monocyte-derived macrophages. We found that CA abrogated HIV-1 replication in macrophages when it was evaluated 7 days after virus inoculation. A similar inhibitory effect was observed in monocyte-derived dendritic cells. The analysis of the mechanisms responsible for the inhibition of HIV-1 production in macrophages revealed that CA efficiently sequesters HIV-1 particles avoiding its infectivity. Moreover, by acting on macrophages themselves, CA diminishes their permissibility to HIV-1 infection by reducing the expression of CD4, enhancing the production of the CCR5-interacting chemokines CCL3/MIP-1α, CCL4/MIP-1β, and CCL5/RANTES, and stimulating the production of interferon-α and the restriction factors APOBEC3G, APOBEC3F, and tetherin. Interestingly, abrogation of HIV-1 replication was overcome when the infection of macrophages was evaluated 2-3 weeks after virus inoculation. However, this reactivation of HIV-1 infection could be silenced by CA when added periodically to HIV-1-challenged macrophages. The induction of a silent HIV-1 infection in macrophages at the periphery, where cells are continuously confronted with CA, might help HIV-1 to evade the immune response and to promote resistance to antiretroviral therapy.
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Affiliation(s)
- Christian Rodriguez Rodrigues
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Federico Remes Lenicov
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Carolina Jancic
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), Hospital de Clínicas “José de San Martín”, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Juan Sabatté
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Mercedes Cabrini
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Ana Ceballos
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Antonela Merlotti
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Heidi Gonzalez
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Matías Ostrowski
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
| | - Jorge Geffner
- Instituto de Investigaciones Médicas en Retrovirus y SIDA (INBIRS), Facultad de Medicina, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), Hospital de Clínicas “José de San Martín”, Universidad de Buenos Aires, Ciudad de Buenos Aires, Argentina
- * E-mail:
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Kothavade RJ, Kura MM, Valand AG, Panthaki MH. Candida tropicalis: its prevalence, pathogenicity and increasing resistance to fluconazole. J Med Microbiol 2010; 59:873-880. [PMID: 20413622 DOI: 10.1099/jmm.0.013227-0] [Citation(s) in RCA: 189] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
Abstract
Candida tropicalis has been identified as the most prevalent pathogenic yeast species of the Candida-non-albicans group. Historically, Candida albicans has been the major species responsible for causing candidiasis in immunocompromised and immunocompetent patients. However, infections (candidiasis) due to C. tropicalis have increased dramatically on a global scale thus proclaiming this organism to be an emerging pathogenic yeast. The reasons for this organism's dominance and its resistance to fluconazole have been difficult to elucidate. In addition, the mechanism of this organism's pathogenicity and the consequent immune response remain to be clarified. This paper describes certain predisposing factors potentially responsible for these characteristics and presents a 'root cause analysis' to explain the increasing prevalence of C. tropicalis in developed and undeveloped countries, as well as the organism's acquired drug resistance. Control measures against fluconazole resistance in clinical management have also been discussed.
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Affiliation(s)
- Rajendra J Kothavade
- Microbiology Section, WQA Laboratory, EPCOR, 9469 Rossdale Rd NW, Edmonton, AB T5K 0S5, Canada
| | - M M Kura
- Department of Dermatology, Grant Medical College and Sir J. J. Group of Hospitals, Mumbai 400 008, India
| | - Arvind G Valand
- Department of Pathology, Grant Medical College and Sir J. J. Group of Hospitals, Mumbai 400 008, India
| | - M H Panthaki
- Department of Immunocytobiology and Pathology, Sir H. N. Hospital and Medical Research Centre, Mumbai 400 004, India
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Henriques M, Azeredo J, Oliveira R. Candida species adhesion to oral epithelium: factors involved and experimental methodology used. Crit Rev Microbiol 2007; 32:217-26. [PMID: 17123906 DOI: 10.1080/10408410601023524] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Due to the increasing prevalence and emergence of Non-Candida albicans Candida (NCAC) species, especially in immunosupressed patients, it is becoming urgent to deepen the current knowledge about virulence factors of these species. Adhesion of cells to epithelium is considered one of the major virulence factors of Candida species. However, relatively little is known concerning the adhesion mechanisms of NCAC species to epithelium, as well as about the factors affecting the adhesion process. This review focuses both the mechanisms that regulate the adhesion interactions and the factors involved and the description of the experimental methodology that has been used to perform the adhesion assays.
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Affiliation(s)
- Mariana Henriques
- Centre of Biological Engineering, University of Minho, Braga, Portugal.
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Tosun I, Aydin F, Kaklikkaya N, Erturk M. Induction of secretory aspartyl proteinase of Candida albicans by HIV-1 but not HSV-2 or some other microorganisms associated with vaginal environment. Mycopathologia 2005; 159:213-8. [PMID: 15770446 DOI: 10.1007/s11046-004-2226-5] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2004] [Accepted: 06/08/2004] [Indexed: 10/25/2022]
Abstract
The most common type of candidiasis involves mucosal sites such as the oral cavity, the gastrointestinal tract and the vagina. Among many of virulence factors, the production of secretory aspartyl proteinase (Sap) by Candida albicans (C. albicans) has gained much attention, and factors leading to Sap induction are thus under intense study. The aim of this study was to examine whether some microorganisms such as Lactobacillus, Gardnerella vaginalis (G. vaginalis), human immunodeficiency virus type-1 (HIV-1) and human herpes simplex virus type-2 (HSV-2) had any Sap inducing effect on C. albicans. Here we showed that among the microorganisms tested in vitro only HIV-1 induced Sap production from C. albicans.
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Affiliation(s)
- Ilknur Tosun
- Department of Microbiology, School of Medicine, Karadeniz Technical University, 61080, Trabzon, Turkey
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Current awareness on yeast. Yeast 2003; 20:1227-34. [PMID: 14609010 DOI: 10.1002/yea.950] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
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