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Characterizing the Proliferation Patterns of Representative Microsporidian Species Enlightens Future Studies of Infection Mechanisms. Pathogens 2022; 11:pathogens11111352. [DOI: 10.3390/pathogens11111352] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2022] [Revised: 11/10/2022] [Accepted: 11/12/2022] [Indexed: 11/17/2022] Open
Abstract
Background: Microsporidia are a group of pathogens that infect all kinds of animals, such as humans, silkworms, honeybees, and shrimp; they, therefore, pose a severe threat to public health and the economy. There are over 1500 species of microsporidia that have been reported, among which Encephalitozoon hellem and Nosema bombycis are the representative zoonotic and insect-infecting species, respectively. Investigating their cell infection patterns is of great significance for understanding their infection mechanisms. Methods: Specific probes were designed for the ribosomal RNA sequences of microsporidia. Fluorescence in situ hybridization (FISH) was used to trace the proliferation cycle of the pathogens in different cells. Results: Here, two rRNA large subunit gene (LSUrRNA) probes specifically labeling N. bombycis were obtained. The life cycle of N. bombycis in silkworm cells and E. hellem in three kinds of host cells was graphically drawn. N. bombycis meronts were first observed at 30 hours post-infection (hpi), and they began merogony. Sporonts were observed at 42 hpi, and the first entire proliferation cycle was completed at 48 hpi. The proliferation cycle of E. hellem in RK13 and HEK293 epithelial cells was almost the same, completing the first life cycle after 24 hpi, but it was significantly delayed to 32 hpi in RAW264.7. Conclusions: Specific FISH probes were established for labeling microsporidia in multiple host cells. The proliferation characteristics of representative zoonotic and insect-infecting microsporidian species were clarified. This study provides an experimental pattern for future analyses of microsporidian infection mechanisms.
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Moysés CRS, Alvares-Saraiva AM, Perez EC, Spadacci-Morena DD, Vidôto da Costa LF, Xavier JG, Lallo MA. Mice with genetic and induced B-cell deficiency as a model for disseminated encephalitozoonosis. Comp Immunol Microbiol Infect Dis 2022; 81:101742. [PMID: 35074660 DOI: 10.1016/j.cimid.2021.101742] [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: 06/10/2021] [Revised: 12/13/2021] [Accepted: 12/14/2021] [Indexed: 11/19/2022]
Abstract
Encephalitozoon cuniculi, an intracellular pathogen, lives in a balanced relationship with immunocompetent individuals based on the activity of T lymphocytes. We previously highlighted the greater susceptibility of B-1 cell-deficient mice (XID mice) to encephalitozoonosis. This study aimed to develop a model of disseminated and severe encephalitozoonosis in mice with combined immunodeficiency to elucidate the role of B cells. To address this objective, cyclophosphamide (Cy)-treated BALB/c and XID mice were inoculated with E. cuniculi, followed by the evaluation of the immune response and histopathological lesions. Immunosuppressed BALB/c mice manifested no clinical signs with an increase in the populations of T lymphocytes and macrophages in the spleen. Immunosuppressed and infected XID mice revealed elevated T cells, macrophages populations, and pro-inflammatory cytokines levels (IFN-γ, TNF-α, and IL-6) with the presence of abdominal effusion and lesions in multiple organs. These clinical characteristics are associated with extensive and severe encephalitozoonosis. The symptoms and lesion size were reduced, whereas B-2 and CD4+ T cells populations were increased in the spleen by transferring B-2 cells adoptive to XID mice. Moreover, B-1 cells adoptive transfer upregulated the peritoneal populations of B-2 cells and macrophages but not T lymphocytes and decreased the symptoms. Herein, we speculated the consistency in the development of severe and disseminated encephalitozoonosis in mice with genetic deficiency of Bruton's tyrosine kinase (Btk) associated with Cy immunosuppression develop with that of the models with T cell deficiency. Taken together, these data emphasized the crucial role of B cells in the protective immune response against encephalitozoonosis.
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Affiliation(s)
- Carla Renata Serantoni Moysés
- Programa de Pós-Graduação em Patologia Ambiental e Experimental, Universidade Paulista - Unip, Rua José Maria Whitaker 290, CEP 05622-001 São Paulo, SP, Brazil
| | - Anuska Marcelino Alvares-Saraiva
- Programa de Pós-Graduação em Patologia Ambiental e Experimental, Universidade Paulista - Unip, Rua José Maria Whitaker 290, CEP 05622-001 São Paulo, SP, Brazil; Laboratório de Fisiopatologia, Instituto Butantan, Av. Vital Brasil 1500, CEP 05503-900 São Paulo, SP, Brazil; Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Cruzeiro do Sul, Rua Galvão Bueno, 868, CEP 01506-000 São Paulo, SP, Brazil
| | - Elizabeth Cristina Perez
- Programa de Pós-Graduação em Patologia Ambiental e Experimental, Universidade Paulista - Unip, Rua José Maria Whitaker 290, CEP 05622-001 São Paulo, SP, Brazil
| | | | - Lidiana Flora Vidôto da Costa
- Programa de Pós-Graduação em Patologia Ambiental e Experimental, Universidade Paulista - Unip, Rua José Maria Whitaker 290, CEP 05622-001 São Paulo, SP, Brazil
| | - José Guilherme Xavier
- Programa de Pós-Graduação em Patologia Ambiental e Experimental, Universidade Paulista - Unip, Rua José Maria Whitaker 290, CEP 05622-001 São Paulo, SP, Brazil
| | - Maria Anete Lallo
- Programa de Pós-Graduação em Patologia Ambiental e Experimental, Universidade Paulista - Unip, Rua José Maria Whitaker 290, CEP 05622-001 São Paulo, SP, Brazil.
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Tiulentino Sy-Go JP, Wegehaupt AK, Sethi S, Lieske JC, D’Costa MR. Microsporidium Infection–Associated Acute Kidney Injury in a Patient With HIV. Kidney Med 2022; 4:100390. [PMID: 35072050 PMCID: PMC8767129 DOI: 10.1016/j.xkme.2021.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Patients infected with HIV (human immunodeficiency virus) are at an increased risk of developing acute kidney injury (AKI) compared with patients without HIV infection. We report a rare case of disseminated Microsporidium infection–associated AKI affecting the native kidneys in a 30-year-old Asian woman with HIV infection. She initially presented to an outside institution with AKI after completing treatment with trimethoprim-sulfamethoxazole (Bactrim [Hoffmann-La Roche]) and prednisone for Pneumocystis pneumonia. She was empirically treated with prednisone for presumed acute interstitial nephritis due to Bactrim, and her serum creatinine concentration improved from 3.0 mg/dL to 1.8 mg/dL. She was subsequently initiated on antiretroviral therapy and was also treated with ganciclovir for cytomegalovirus viremia. Because of persistent fever, she was transferred to our institution and was diagnosed with a disseminated Mycobacterium avium complex infection and a disseminated Microsporidium infection. Her serum creatinine concentration increased to 4.2 mg/dL. A kidney biopsy was performed because of her worsening kidney function, which revealed plasma cell–rich acute interstitial nephritis associated with disseminated Microsporidium infection. She was maintained on antiretroviral therapy and was treated with albendazole. This case highlights the fact that there are various etiologies and kidney manifestations of AKI in patients infected with HIV with equally various implications for management; thus, performing a kidney biopsy is often crucial to help elucidate the underlying pathology and guide management.
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Dumond C, Aulagnon F, Etienne I, Heng AE, Bougnoux ME, Favennec L, Kamar N, Iriart X, Pereira B, Büchler M, Desoubeaux G, Kaminski H, Lussac-Sorton F, Gargala G, Anglicheau D, Poirier P, Scemla A, Garrouste C. Epidemiological and clinical study of microsporidiosis in French kidney transplant recipients from 2005 to 2019: TRANS-SPORE registry. Transpl Infect Dis 2021; 23:e13708. [PMID: 34324771 DOI: 10.1111/tid.13708] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/29/2021] [Accepted: 07/01/2021] [Indexed: 12/21/2022]
Abstract
INTRODUCTION Microsporidiosis is an emerging opportunistic infection in renal transplantation (RT) recipients. We aimed to describe its clinical presentation and treatment. MATERIALS AND METHODS We collected microsporidiosis cases identified in RT recipients between 2005 and 2019 in six French centers from the Crystal, Divat and Astre prospective databases. RESULTS We report 68 RT recipients with intestinal microsporidiosis; the patients were predominantly male (61.8%), with a median age of 58 (46-69) years. Infection occurred at a median time of 3 (0.8-6.8) years posttransplant. Only Enterocytozoon bieneusi was found. Microsporidiosis manifested as diarrhea (98.5% of patients) with weight loss (72.1%) and acute renal injury (57.4%) without inflammatory biological parameters. The therapeutic approaches were no treatment (N = 9), reduction of the immunosuppressive regimen (∆IS) (N = 22), fumagillin alone (N = 9), fumagillin and ∆IS (N = 19), and albendazole or nitazoxanide and ∆IS (N = 9). Overall clinical remission was observed in 60 patients (88.2%). We observed no acute kidney rejection, renal transplant failure, or death within 6 months after microsporidiosis. CONCLUSION E. bieneusi is an underestimated opportunistic pathogen in RT recipients, and infection with E. bieneusi leads to diarrhea with important dehydration and acute renal injury. The treatment is based on the reduction of the immunosuppressive regimen and the administration of fumagillin if available.
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Affiliation(s)
- Clément Dumond
- Department of Nephrology, 3iHP, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
| | - Florence Aulagnon
- Department of Nephrology and Kidney Transplantation, Assistance Publique-Hôpitaux de Paris, Necker Hospital, Paris, France
| | - Isabelle Etienne
- Department of Nephrology, Rouen University Hospital, Rouen, France
| | - Anne-Elisabeth Heng
- Department of Nephrology, 3iHP, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
| | - Marie-Elisabeth Bougnoux
- Department of Parasitology, Necker Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Loic Favennec
- Department of Parasitology, Rouen University Hospital, University of Rouen, Mont-Saint-Aignan, France
| | - Nassim Kamar
- Department of Nephrology and Organ Transplantation, Toulouse Rangueil University Hospital, Center for Pathophysiology of Toulouse Purpan, Paul Sabatier University, Toulouse, France
| | - Xavier Iriart
- Service de Parasitologie-Mycologie, CHU Toulouse, Hôpital Purpan, Toulouse, France.,Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity), CNRS UMR5051, INSERM UMR1291, UPS, Université Toulouse, Toulouse, France
| | - Bruno Pereira
- Biostatistics Unit (DRCI), Clermont-Ferrand University Hospital, Clermont-Ferrand, France
| | - Mathias Büchler
- Department of Nephrology and Clinical Immunology, Tours University Hospital, Tours, France
| | - Guillaume Desoubeaux
- Department of Parasitology-Mycology- Tropical Medicine, Tours University Hospital, Tours, France
| | - Hannah Kaminski
- Department of Nephrology, Bordeaux University Hospital, Bordeaux, France
| | | | - Gilles Gargala
- Department of Parasitology, Rouen University Hospital, University of Rouen, Mont-Saint-Aignan, France
| | - Dany Anglicheau
- Department of Nephrology and Kidney Transplantation, Assistance Publique-Hôpitaux de Paris, Necker Hospital, Paris, France
| | - Philippe Poirier
- Department of Parasitology, Clermont-Ferrand University Hospital, 3iHP, Clermont-Ferrand, INSERM, Université Clermont Auvergne, Clermont-Ferrand, France
| | - Anne Scemla
- Department of Nephrology and Kidney Transplantation, Assistance Publique-Hôpitaux de Paris, Necker Hospital, Paris, France
| | - Cyril Garrouste
- Department of Nephrology, 3iHP, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
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- Department of Nephrology, 3iHP, Clermont-Ferrand University Hospital, Clermont-Ferrand, France
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Abstract
Microsporidia are obligate intracellular pathogens identified ∼150 years ago as the cause of pébrine, an economically important infection in silkworms. There are about 220 genera and 1,700 species of microsporidia, which are classified based on their ultrastructural features, developmental cycle, host-parasite relationship, and molecular analysis. Phylogenetic analysis suggests that microsporidia are related to the fungi, being grouped with the Cryptomycota as a basal branch or sister group to the fungi. Microsporidia can be transmitted by food and water and are likely zoonotic, as they parasitize a wide range of invertebrate and vertebrate hosts. Infection in humans occurs in both immunocompetent and immunodeficient hosts, e.g., in patients with organ transplantation, patients with advanced human immunodeficiency virus (HIV) infection, and patients receiving immune modulatory therapy such as anti-tumor necrosis factor alpha antibody. Clusters of infections due to latent infection in transplanted organs have also been demonstrated. Gastrointestinal infection is the most common manifestation; however, microsporidia can infect virtually any organ system, and infection has resulted in keratitis, myositis, cholecystitis, sinusitis, and encephalitis. Both albendazole and fumagillin have efficacy for the treatment of various species of microsporidia; however, albendazole has limited efficacy for the treatment of Enterocytozoon bieneusi. In addition, immune restoration can lead to resolution of infection. While the prevalence rate of microsporidiosis in patients with AIDS has fallen in the United States, due to the widespread use of combination antiretroviral therapy (cART), infection continues to occur throughout the world and is still seen in the United States in the setting of cART if a low CD4 count persists.
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Doshi N, Thet Z, Han T, Martin J. A Case of Intestinal Microsporidiosis in a Renal Transplant Recipient. J Med Cases 2019; 10:229-233. [PMID: 34434311 PMCID: PMC8383712 DOI: 10.14740/jmc3340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2019] [Accepted: 07/30/2019] [Indexed: 12/20/2022] Open
Abstract
Post-renal transplant diarrhea is a common clinical presentation. An extensive list of potential etiology adds to the diagnostic dilemma. In cases of prolonged or intractable diarrhea, invasive tests are often performed. Intestinal microsporidia can be diagnosed with simple non-invasive stool polymerase chain reaction (PCR). Based on this case, we propose an easy to follow flow chart and present a literature review on post-renal transplant diarrhea. Further multicenter validation testing is required for the proposed flow chart.
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Affiliation(s)
- Nidhi Doshi
- Department of General Medicine, Gold Coast University Hospital, QLD, Australia
| | - Zaw Thet
- Department of Nephrology, Central Queensland Hospital and Health Service, Rockhampton, QLD, Australia
| | - Thin Han
- Department of Nephrology, Central Queensland Hospital and Health Service, Rockhampton, QLD, Australia.,Rural Clinical School, University of Queensland, Rockhampton, QLD, Australia
| | - Julieanne Martin
- Department of Nephrology, Central Queensland Hospital and Health Service, Rockhampton, QLD, Australia
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