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Serafino A, Bertinat YA, Bueno J, Pittaluga JR, Birnberg Weiss F, Milillo MA, Barrionuevo P. Beyond its preferential niche: Brucella abortus RNA down-modulates the IFN-γ-induced MHC-I expression in epithelial and endothelial cells. PLoS One 2024; 19:e0306429. [PMID: 38980867 PMCID: PMC11232970 DOI: 10.1371/journal.pone.0306429] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2024] [Accepted: 06/17/2024] [Indexed: 07/11/2024] Open
Abstract
Brucella abortus (Ba) is a pathogen that survives inside macrophages. Despite being its preferential niche, Ba infects other cells, as shown by the multiple signs and symptoms humans present. This pathogen can evade our immune system. Ba displays a mechanism of down-modulating MHC-I on monocytes/macrophages in the presence of IFN-γ (when Th1 response is triggered) without altering the total expression of MHC-I. The retained MHC-I proteins are located within the Golgi Apparatus (GA). The RNA of Ba is one of the PAMPs that trigger this phenomenon. However, we acknowledged whether this event could be triggered in other cells relevant during Ba infection. Here, we demonstrate that Ba RNA reduced the surface expression of MHC-I induced by IFN-γ in the human bronchial epithelium (Calu-6), the human alveolar epithelium (A-549) and the endothelial microvasculature (HMEC) cell lines. In Calu-6 and HMEC cells, Ba RNA induces the retention of MHC-I in the GA. This phenomenon was not observed in A-549 cells. We then evaluated the effect of Ba RNA on the secretion of IL-8, IL-6 and MCP-1, key cytokines in Ba infection. Contrary to our expectations, HMEC, Calu-6 and A-549 cells treated with Ba RNA had higher IL-8 and IL-6 levels compared to untreated cells. In addition, we showed that Ba RNA down-modulates the MHC-I surface expression induced by IFN-γ on human monocytes/macrophages via the pathway of the Epidermal Growth Factor Receptor (EGFR). So, cells were stimulated with an EGFR ligand-blocking antibody (Cetuximab) and Ba RNA. Neutralization of the EGFR to some extent reversed the down-modulation of MHC-I mediated by Ba RNA in HMEC and A-549 cells. In conclusion, this is the first study exploring a central immune evasion strategy, such as the downregulation of MHC-I surface expression, beyond monocytes and could shed light on how it persists effectively within the host, enduring unseen and escaping CD8+ T cell surveillance.
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Affiliation(s)
- Agustina Serafino
- Instituto de Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, Academia Nacional de Medicina; Buenos Aires, Argentina
| | - Yasmín A. Bertinat
- Instituto de Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, Academia Nacional de Medicina; Buenos Aires, Argentina
| | - Jorgelina Bueno
- Instituto de Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, Academia Nacional de Medicina; Buenos Aires, Argentina
| | - José R. Pittaluga
- Instituto de Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, Academia Nacional de Medicina; Buenos Aires, Argentina
| | - Federico Birnberg Weiss
- Instituto de Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, Academia Nacional de Medicina; Buenos Aires, Argentina
| | - M. Ayelén Milillo
- Universidad Nacional de Río Negro. Instituto de Estudios en Ciencia, Tecnología, Cultura y Desarrollo. Río Negro, Argentina
- Consejo Nacional de Investigaciones Científicas y Técnicas. Argentina
| | - Paula Barrionuevo
- Instituto de Medicina Experimental-Consejo Nacional de Investigaciones Científicas y Técnicas, Academia Nacional de Medicina; Buenos Aires, Argentina
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2
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Wang D, Ding D, Liu Y, Shi X. Open surgery for the infected pseudoaneurysm of common carotid artery: A case report. Asian J Surg 2024; 47:1806-1808. [PMID: 38155078 DOI: 10.1016/j.asjsur.2023.12.106] [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: 11/12/2023] [Accepted: 12/15/2023] [Indexed: 12/30/2023] Open
Abstract
OBJECTIVE To report a patient of pseudoaneurysm of carotid artery caused by brucellosis infection and improve the recognition, diagnosis and treatment of this disease. METHODS The etiology, clinical data and treatment of false aneurysm were reviewed A 75-year-old man with a high probability of pseudoaneurysm of the left common carotid artery was found by enhanced CT. Open surgery was performed. Bacterial culture return was Brucella. After regular oral drug treatment, the patient recovered well. RESULTS The patient recovered well after surgery and took oral medication regularly for 3 months without recurrence. CONCLUSION Pseudoaneurysms of the carotid artery caused by brucella infection are very rare, and correct diagnosis and open surgery combined with drug therapy are the best choices.
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Affiliation(s)
- Dong Wang
- Hebei General Hospital (Department of Vascular Surgery), Shijiazhuang, Hebei, 050051, PR China; Hebei North University (School of Clinical Medicine), Zhangjiakou, Hebei, 075031, PR China
| | - Dianzhu Ding
- Hebei General Hospital (Department of Vascular Surgery), Shijiazhuang, Hebei, 050051, PR China
| | - Yuhang Liu
- Hebei General Hospital (Department of Vascular Surgery), Shijiazhuang, Hebei, 050051, PR China; Hebei Medical University (School of Clinical Medicine), Shijiazhuang, Hebei, 050051, PR China
| | - Xiaoming Shi
- Hebei General Hospital (Department of Vascular Surgery), Shijiazhuang, Hebei, 050051, PR China.
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3
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Carvalho TP, Toledo FAO, Bautista DFA, Silva MF, Oliveira JBS, Lima PA, Costa FB, Ribeiro NQ, Lee JY, Birbrair A, Paixão TA, Tsolis RM, Santos RL. Pericytes modulate endothelial inflammatory response during bacterial infection. mBio 2024; 15:e0325223. [PMID: 38289074 PMCID: PMC10936204 DOI: 10.1128/mbio.03252-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2023] [Accepted: 12/13/2023] [Indexed: 03/14/2024] Open
Abstract
Pericytes are located around blood vessels, in close contact with endothelial cells. We discovered that pericytes dampen pro-inflammatory endothelial cell responses. Endothelial cells co-cultured with pericytes had markedly reduced expression of adhesion molecules (PECAM-1 and ICAM-1) and proinflammatory cytokines (CCL-2 and IL-6) in response to bacterial stimuli (Brucella ovis, Listeria monocytogenes, or Escherichia coli lipopolysaccharide). Pericyte-depleted mice intraperitoneally inoculated with either B. ovis, a stealthy pathogen that does not trigger detectable inflammation, or Listeria monocytogenes, developed peritonitis. Further, during Citrobacter rodentium infection, pericyte-depleted mice developed severe intestinal inflammation, which was not evident in control mice. The anti-inflammatory effect of pericytes required connexin 43, as either chemical inhibition or silencing of connexin 43 abrogated pericyte-mediated suppression of endothelial inflammatory responses. Our results define a mechanism by which pericytes modulate inflammation during infection, which shifts our understanding of pericyte biology: from a structural cell to a pro-active player in modulating inflammation. IMPORTANCE A previously unknown mechanism by which pericytes modulate inflammation was discovered. The absence of pericytes or blocking interaction between pericytes and endothelium through connexin 43 results in stronger inflammation, which shifts our understanding of pericyte biology, from a structural cell to a player in controlling inflammation.
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Affiliation(s)
- Thaynara P. Carvalho
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
| | - Frank A. O. Toledo
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Diego F. A. Bautista
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Monique F. Silva
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jefferson B. S. Oliveira
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Pâmela A. Lima
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Fabíola B. Costa
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Noelly Q. Ribeiro
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Jee-Yon Lee
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
| | - Alexander Birbrair
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Dermatology, School of Medicine and Public Health, University of Wisconsin-Madison, Madison, Wisconsin, USA
| | - Tatiane A. Paixão
- Departamento de Patologia Geral, Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
| | - Reneé M. Tsolis
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
| | - Renato L. Santos
- Departamento de Clínica e Cirurgia Veterinárias, Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Minas Gerais, Brazil
- Department of Medical Microbiology and Immunology, University of California, Davis, California, USA
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4
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Eidt JF, Parrott ME, Gucwa AL, B Chu TH, Bettacchi C, Mb Musser J. The Role of Feral Swine in Human Aortic Infection With Brucella Species. Vasc Endovascular Surg 2023; 57:941-948. [PMID: 37313853 DOI: 10.1177/15385744231183786] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Brucellosis is one of the most common zoonotic infections in the world. Human infections are the result of direct exposure to infected animals or ingestion of unprocessed dairy products. While Brucella sp. infection has largely been eliminated from commercial cattle and swine with aggressive vaccination, there is a significant prevalence of Brucella sp. infection in the expanding population of feral swine in the US. We report the surgical treatment of a ruptured mycotic aneurysm of the abdominal aorta due to Brucella suis in a woman living in a rural community with a large population of feral swine. Vascular surgeons should be aware that brucellosis can result in arterial infection and should be considered in the differential diagnosis in patients with a history of exposure to feral swine or the ingestion of unprocessed dairy products.
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Affiliation(s)
- John F Eidt
- Baylor Scott and White Heart and Vascular Hospital, Texas A&M Health Science University, Dallas, TX, USA
| | - Megan E Parrott
- General Surgery Residency Program, Baylor University Medical Center, Dallas, TX, USA
| | - Angela L Gucwa
- Doctors Community Medical Center, Luminis Health, Annapolis, MD, USA
| | - Tuan-Hung B Chu
- Baylor Scott and White Heart and Vascular Hospital, Texas A&M Health Science University, Dallas, TX, USA
| | - Chris Bettacchi
- North Texas Infectious Disease Consultants, Division of Infectious Disease, Baylor University Medical Center, Dallas, TX, USA
| | - Jeffrey Mb Musser
- Department of Veterinary Pathobiology, Texas A&M University College of Veterinary Medicine, College Station TX, USA
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5
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de Carvalho TP, da Silva LA, Castanheira TLL, de Souza TD, da Paixão TA, Lazaro-Anton L, Tsolis RM, Santos RL. Cell and Tissue Tropism of Brucella spp. Infect Immun 2023; 91:e0006223. [PMID: 37129522 PMCID: PMC10187126 DOI: 10.1128/iai.00062-23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2023] Open
Abstract
Brucella spp. are facultatively intracellular bacteria that can infect, survive, and multiply in various host cell types in vivo and/or in vitro. The genus Brucella has markedly expanded in recent years with the identification of novel species and hosts, which has revealed additional information about the cell and tissue tropism of these pathogens. Classically, Brucella spp. are considered to have tropism for organs that contain large populations of phagocytes such as lymph nodes, spleen, and liver, as well as for organs of the genital system, including the uterus, epididymis, testis, and placenta. However, experimental infections of several different cultured cell types indicate that Brucella may actually have a broader cell tropism than previously thought. Indeed, recent studies indicate that certain Brucella species in particular hosts may display a pantropic distribution in vivo. This review discusses the available knowledge on cell and tissue tropism of Brucella spp. in natural infections of various host species, as well as in experimental animal models and cultured cells.
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Affiliation(s)
- Thaynara Parente de Carvalho
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Department of Medical Microbiology and Immunology, University of California – Davis, Davis, California, USA
| | - Laice Alves da Silva
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Thaís Larissa Lourenço Castanheira
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Instituto Federal de Educação Ciência e Tecnologia do Norte de Minas Gerais, Salinas, Brazil
| | - Tayse Domingues de Souza
- Escuela de Medicina Veterinaria, Facultad de Agronomía e Ingeniería Forestal, Facultad de Ciencias Biológicas y Facultad de Medicina, Pontificia Universidad Católica de Chile, Santiago, Chile
| | - Tatiane Alves da Paixão
- Instituto de Ciências Biológicas, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
| | - Leticia Lazaro-Anton
- Department of Medical Microbiology and Immunology, University of California – Davis, Davis, California, USA
| | - Renee M. Tsolis
- Department of Medical Microbiology and Immunology, University of California – Davis, Davis, California, USA
| | - Renato Lima Santos
- Escola de Veterinária, Universidade Federal de Minas Gerais, Belo Horizonte, Brazil
- Department of Medical Microbiology and Immunology, University of California – Davis, Davis, California, USA
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6
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Li X, Wang Q, Zhang Y, Sun X, Yin H, Zhang H, Luo SX, Wang Z, Yu Q, Chen Z, Cheng Z. Treatment of abdominal aortic pseudoaneurysm caused by brucellosis with endovascular aneurysm repair. Front Bioeng Biotechnol 2023; 11:1122997. [PMID: 36741757 PMCID: PMC9892713 DOI: 10.3389/fbioe.2023.1122997] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Accepted: 01/06/2023] [Indexed: 01/20/2023] Open
Abstract
Peripheral vascular disease caused by brucellosis is rarely seen around the world; thus, it is easily ignored by patients and doctors, leading to a lack of corresponding screening and delayed comprehensive treatment. Currently, there is no standard or guideline for diagnosing and treating peripheral arterial disease caused by brucellosis. From June 2021 to December 2022, four cases of abdominal aortic pseudoaneurysm caused by brucellosis disease were treated with endovascular aneurysm repair This study reported treatment results as follows and reviewed the incidence, treatment, and prognosis of abdominal aortic pseudoaneurysm caused by brucellosis.
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Affiliation(s)
- Xiao Li
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Qilong Wang
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Yang Zhang
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Xiwei Sun
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Hang Yin
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Hua Zhang
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Sean X. Luo
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Zhongying Wang
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Qi Yu
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China
| | - Zhiming Chen
- Department of Forensic Medicine, Basic Medical College, Jilin University, Changchun, China,*Correspondence: Zhihua Cheng, ; Zhiming Chen,
| | - Zhihua Cheng
- Department of Vascular Surgery, General Surgery Center, The First Hospital of Jilin University, Changchun, China,*Correspondence: Zhihua Cheng, ; Zhiming Chen,
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7
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Infection and Immunity. Clin Immunol 2023. [DOI: 10.1016/b978-0-12-818006-8.00007-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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8
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Xiao X, Li Y, Li L, Xiong YQ. Identification of Methicillin-Resistant Staphylococcus aureus (MRSA) Genetic Factors Involved in Human Endothelial Cells Damage, an Important Phenotype Correlated with Persistent Endovascular Infection. Antibiotics (Basel) 2022; 11:antibiotics11030316. [PMID: 35326779 PMCID: PMC8944730 DOI: 10.3390/antibiotics11030316] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 02/18/2022] [Accepted: 02/24/2022] [Indexed: 01/18/2023] Open
Abstract
Methicillin-resistant Staphylococcus aureus (MRSA) is a leading cause of life-threatening endovascular infections. Endothelial cell (EC) damage is a key factor in the pathogenesis of these syndromes. However, genetic factors related to the EC damage have not been well studied. This study aims to identify genetic determinants that impact human EC damage by screening the genome-wide Nebraska Transposon Mutant Library (NTML). A well-established MTT assay was used to test the in vitro damage of human EC cell line (HMEC-1) caused by each mutant strain in the NTML. We first confirmed some global regulators and genes positively impact the EC damage, which is consistent with published results. These data support the utility of the high-throughput approach. Importantly, we demonstrated 317 mutants significantly decreased the EC damage, while only 6 mutants enhanced the EC damage vs. parental JE2 strain. The majority of these genes have not been previously defined to affect human EC damage. Interestingly, many of these newly identified genes are involved in metabolism, genetic and environmental information processing, and cellular processes. These results advance our knowledge of staphylococcal genetic factors related to human EC damage which may provide novel targets for the development of effective agents against MRSA endovascular infection.
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Affiliation(s)
- Xia Xiao
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA 90502, USA; (X.X.); (Y.L.); (L.L.)
- College of Veterinary Medicine, Yangzhou University, Yangzhou 225009, China
| | - Yi Li
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA 90502, USA; (X.X.); (Y.L.); (L.L.)
| | - Liang Li
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA 90502, USA; (X.X.); (Y.L.); (L.L.)
- Center for Devices and Radiological Health, U.S. Food and Drug Administration, Silver Spring, MD 20993, USA
| | - Yan Q. Xiong
- The Lundquist Institute for Biomedical Innovation at Harbor-UCLA Medical Center, Torrance, CA 90502, USA; (X.X.); (Y.L.); (L.L.)
- David Geffen School of Medicine at UCLA, Los Angeles, CA 90095, USA
- Correspondence: ; Tel.: +1-310-222-3545
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9
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Gowe I, Parsons C, Vickery S, Best M, Prechter S, Haskell MG, Parsons E. Venous thrombosis, peripheral aneurysm formation, and fever in a feral pig hunter with Brucellosis. IDCases 2022; 27:e01449. [PMID: 35198390 PMCID: PMC8844863 DOI: 10.1016/j.idcr.2022.e01449] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Revised: 02/09/2022] [Accepted: 02/09/2022] [Indexed: 01/18/2023] Open
Abstract
Brucellosis is a systemic bacterial zoonotic disease with potential endovascular complications including endocarditis, although multifocal vasculopathy is rare. Moreover, swine-associated human infections are less common since brucellosis was eradicated in commercial swine in U.S. states and territories. However, feral swine continue to serve as a reservoir for Brucella suis. We describe the case of a feral swine hunter who presented with fever and respiratory symptoms and was diagnosed with pulmonary embolus. Blood cultures revealed growth of Brucella, later confirmed as Brucella suis. Despite initial appropriate antimicrobial therapy, he maintained fever with worsening knee pain, and magnetic resonance imaging and two-dimensional echocardiography subsequently confirmed the presence of a thrombosed popliteal artery aneurysm and mitral valve vegetation, respectively. To our knowledge, this is the first report of contemporaneous venous and arterial thromboembolism attributable to B. suis infection.
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Affiliation(s)
- Ivan Gowe
- Infection Prevention and Control Department, Margaret R Pardee Hospital, 800 North Justice Street, Hendersonville, NC 28791, USA
| | - Christopher Parsons
- Pardee Hospital Center for Infectious Diseases, 705 6th Avenue West, Suite D, Hendersonville, NC 28739, USA
| | - Stephen Vickery
- Wingate University School of Pharmacy, 805 6th Avenue West, Suite 200, Hendersonville, NC 28739, USA
| | - Michael Best
- Department of Microbiology, Margaret R. Pardee Memorial Hospital, 800 North Justice Street, Hendersonville, NC 28791, USA
| | - Scott Prechter
- Department of Radiology, Margaret R. Pardee Memorial Hospital, 800 North Justice Street, Hendersonville, NC 28791, USA
| | | | - Eveline Parsons
- Department of Animal Science, Berry College, P.O. Box 493259, Mount Berry, GA 30149, USA
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10
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Li S, Wang Q. Brucellosis relapse causing thoracic aortic ulcers and aneurysm formation: a case report. BMC Infect Dis 2022; 22:43. [PMID: 35012454 PMCID: PMC8751343 DOI: 10.1186/s12879-021-07005-7] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Accepted: 12/22/2021] [Indexed: 01/18/2023] Open
Abstract
Background Brucellosis is an infectious disease caused by Brucella spp, which can involve the cardiovascular, digestive, and respiratory systems. Cardiovascular involvement is a rare occurrence, it has an extremely high mortality rate. Case presentation A 67-year-old Chinese man presented with thoracic aortic multiple ulcers and partial aneurysm formation that caused symptoms of left waist and left buttock pain. The man was admitted to our hospital due to abdominal aorta pseudoaneurysms 5 years ago. The diagnosis was made by thoracic computed tomography angiography (CTA), previous history, and positive culture of Brucella, and the patient was successfully treated by thoracic aortic covered stent-graft implantation and specific medical treatment. Conclusions People who have a history of contact with cattle and sheep, should beware of the possibility of Brucella infection. If chest and abdominal pain occur, timely medical treatment is recommended, aortic aneurysm, the disease with a high risk of death, can be identified or excluded by CTA. Early treatment and prevention of disease progression are more beneficial to patients.
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Affiliation(s)
- Shuai Li
- Department of Infectious Disease, Shanxi Provincial People's Hospital, Taiyuan, China
| | - Qiang Wang
- Department of Infectious Disease, Shanxi Provincial People's Hospital, Taiyuan, China.
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11
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Stranahan LW, Arenas-Gamboa AM. When the Going Gets Rough: The Significance of Brucella Lipopolysaccharide Phenotype in Host-Pathogen Interactions. Front Microbiol 2021; 12:713157. [PMID: 34335551 PMCID: PMC8319746 DOI: 10.3389/fmicb.2021.713157] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2021] [Accepted: 06/22/2021] [Indexed: 01/18/2023] Open
Abstract
Brucella is a facultatively intracellular bacterial pathogen and the cause of worldwide zoonotic infections, infamous for its ability to evade the immune system and persist chronically within host cells. Despite the frequent association with attenuation in other Gram-negative bacteria, a rough lipopolysaccharide phenotype is retained by Brucella canis and Brucella ovis, which remain fully virulent in their natural canine and ovine hosts, respectively. While these natural rough strains lack the O-polysaccharide they, like their smooth counterparts, are able to evade and manipulate the host immune system by exhibiting low endotoxic activity, resisting destruction by complement and antimicrobial peptides, entering and trafficking within host cells along a similar pathway, and interfering with MHC-II antigen presentation. B. canis and B. ovis appear to have compensated for their roughness by alterations to their outer membrane, especially in regards to outer membrane proteins. B. canis, in particular, also shows evidence of being less proinflammatory in vivo, suggesting that the rough phenotype may be associated with an enhanced level of stealth that could allow these pathogens to persist for longer periods of time undetected. Nevertheless, much additional work is required to understand the correlates of immune protection against the natural rough Brucella spp., a critical step toward development of much-needed vaccines. This review will highlight the significance of rough lipopolysaccharide in the context of both natural disease and host–pathogen interactions with an emphasis on natural rough Brucella spp. and the implications for vaccine development.
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Affiliation(s)
- Lauren W Stranahan
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
| | - Angela M Arenas-Gamboa
- Department of Veterinary Pathobiology, College of Veterinary Medicine and Biomedical Sciences, Texas A&M University, College Station, TX, United States
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12
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Roop RM, Barton IS, Hopersberger D, Martin DW. Uncovering the Hidden Credentials of Brucella Virulence. Microbiol Mol Biol Rev 2021; 85:e00021-19. [PMID: 33568459 PMCID: PMC8549849 DOI: 10.1128/mmbr.00021-19] [Citation(s) in RCA: 47] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Bacteria in the genus Brucella are important human and veterinary pathogens. The abortion and infertility they cause in food animals produce economic hardships in areas where the disease has not been controlled, and human brucellosis is one of the world's most common zoonoses. Brucella strains have also been isolated from wildlife, but we know much less about the pathobiology and epidemiology of these infections than we do about brucellosis in domestic animals. The brucellae maintain predominantly an intracellular lifestyle in their mammalian hosts, and their ability to subvert the host immune response and survive and replicate in macrophages and placental trophoblasts underlies their success as pathogens. We are just beginning to understand how these bacteria evolved from a progenitor alphaproteobacterium with an environmental niche and diverged to become highly host-adapted and host-specific pathogens. Two important virulence determinants played critical roles in this evolution: (i) a type IV secretion system that secretes effector molecules into the host cell cytoplasm that direct the intracellular trafficking of the brucellae and modulate host immune responses and (ii) a lipopolysaccharide moiety which poorly stimulates host inflammatory responses. This review highlights what we presently know about how these and other virulence determinants contribute to Brucella pathogenesis. Gaining a better understanding of how the brucellae produce disease will provide us with information that can be used to design better strategies for preventing brucellosis in animals and for preventing and treating this disease in humans.
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Affiliation(s)
- R Martin Roop
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Ian S Barton
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Dariel Hopersberger
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
| | - Daniel W Martin
- Department of Microbiology and Immunology, Brody School of Medicine, East Carolina University, Greenville, North Carolina, USA
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13
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Li L, Acioglu C, Heary RF, Elkabes S. Role of astroglial toll-like receptors (TLRs) in central nervous system infections, injury and neurodegenerative diseases. Brain Behav Immun 2021; 91:740-755. [PMID: 33039660 PMCID: PMC7543714 DOI: 10.1016/j.bbi.2020.10.007] [Citation(s) in RCA: 132] [Impact Index Per Article: 44.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2020] [Revised: 09/22/2020] [Accepted: 10/06/2020] [Indexed: 02/07/2023] Open
Abstract
Central nervous system (CNS) innate immunity plays essential roles in infections, neurodegenerative diseases, and brain or spinal cord injuries. Astrocytes and microglia are the principal cells that mediate innate immunity in the CNS. Pattern recognition receptors (PRRs), expressed by astrocytes and microglia, sense pathogen-derived or endogenous ligands released by damaged cells and initiate the innate immune response. Toll-like receptors (TLRs) are a well-characterized family of PRRs. The contribution of microglial TLR signaling to CNS pathology has been extensively investigated. Even though astrocytes assume a wide variety of key functions, information about the role of astroglial TLRs in CNS disease and injuries is limited. Because astrocytes display heterogeneity and exhibit phenotypic plasticity depending on the effectors present in the local milieu, they can exert both detrimental and beneficial effects. TLRs are modulators of these paradoxical astroglial properties. The goal of the current review is to highlight the essential roles played by astroglial TLRs in CNS infections, injuries and diseases. We discuss the contribution of astroglial TLRs to host defense as well as the dissemination of viral and bacterial infections in the CNS. We examine the link between astroglial TLRs and the pathogenesis of neurodegenerative diseases and present evidence showing the pivotal influence of astroglial TLR signaling on sterile inflammation in CNS injury. Finally, we define the research questions and areas that warrant further investigations in the context of astrocytes, TLRs, and CNS dysfunction.
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Affiliation(s)
- Lun Li
- The Reynolds Family Spine Laboratory, Department of Neurosurgery, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, United States
| | - Cigdem Acioglu
- The Reynolds Family Spine Laboratory, Department of Neurosurgery, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, United States
| | - Robert F. Heary
- Department of Neurological Surgery, Hackensack Meridian School of Medicine, Nutley, NJ 07110, United States
| | - Stella Elkabes
- The Reynolds Family Spine Laboratory, Department of Neurosurgery, New Jersey Medical School, Rutgers, The State University of New Jersey, Newark, NJ 07103, United States.
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14
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Bialer MG, Sycz G, Muñoz González F, Ferrero MC, Baldi PC, Zorreguieta A. Adhesins of Brucella: Their Roles in the Interaction with the Host. Pathogens 2020; 9:E942. [PMID: 33198223 PMCID: PMC7697752 DOI: 10.3390/pathogens9110942] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2020] [Revised: 11/03/2020] [Accepted: 11/05/2020] [Indexed: 01/30/2023] Open
Abstract
A central aspect of Brucella pathogenicity is its ability to invade, survive, and replicate in diverse phagocytic and non-phagocytic cell types, leading to chronic infections and chronic inflammatory phenomena. Adhesion to the target cell is a critical first step in the invasion process. Several Brucella adhesins have been shown to mediate adhesion to cells, extracellular matrix components (ECM), or both. These include the sialic acid-binding proteins SP29 and SP41 (binding to erythrocytes and epithelial cells, respectively), the BigA and BigB proteins that contain an Ig-like domain (binding to cell adhesion molecules in epithelial cells), the monomeric autotransporters BmaA, BmaB, and BmaC (binding to ECM components, epithelial cells, osteoblasts, synoviocytes, and trophoblasts), the trimeric autotransporters BtaE and BtaF (binding to ECM components and epithelial cells) and Bp26 (binding to ECM components). An in vivo role has also been shown for the trimeric autotransporters, as deletion mutants display decreased colonization after oral and/or respiratory infection in mice, and it has also been suggested for BigA and BigB. Several adhesins have shown unipolar localization, suggesting that Brucella would express an adhesive pole. Adhesin-based vaccines may be useful to prevent brucellosis, as intranasal immunization in mice with BtaF conferred high levels of protection against oral challenge with B. suis.
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Affiliation(s)
- Magalí G. Bialer
- Fundación Instituto Leloir (FIL), IIBBA (CONICET-FIL), Buenos Aires 1405, Argentina; (M.G.B.); (G.S.)
| | - Gabriela Sycz
- Fundación Instituto Leloir (FIL), IIBBA (CONICET-FIL), Buenos Aires 1405, Argentina; (M.G.B.); (G.S.)
| | - Florencia Muñoz González
- Cátedra de Inmunología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (F.M.G.); (M.C.F.)
- Instituto de Estudios de la Inmunidad Humoral (IDEHU), CONICET-Universidad de Buenos Aires, Buenos Aires 1113, Argentina
| | - Mariana C. Ferrero
- Cátedra de Inmunología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (F.M.G.); (M.C.F.)
- Instituto de Estudios de la Inmunidad Humoral (IDEHU), CONICET-Universidad de Buenos Aires, Buenos Aires 1113, Argentina
| | - Pablo C. Baldi
- Cátedra de Inmunología, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (F.M.G.); (M.C.F.)
- Instituto de Estudios de la Inmunidad Humoral (IDEHU), CONICET-Universidad de Buenos Aires, Buenos Aires 1113, Argentina
| | - Angeles Zorreguieta
- Fundación Instituto Leloir (FIL), IIBBA (CONICET-FIL), Buenos Aires 1405, Argentina; (M.G.B.); (G.S.)
- Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires 1428, Argentina
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15
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Pathogenesis and immune response in Brucella infection acquired by the respiratory route. Microbes Infect 2020; 22:407-415. [DOI: 10.1016/j.micinf.2020.06.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2020] [Revised: 05/25/2020] [Accepted: 06/02/2020] [Indexed: 01/18/2023]
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16
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Rodríguez AM, Trotta A, Melnyczajko AP, Miraglia MC, Kim KS, Delpino MV, Barrionuevo P, Giambartolomei GH. Brucella abortus-Stimulated Platelets Activate Brain Microvascular Endothelial Cells Increasing Cell Transmigration through the Erk1/2 Pathway. Pathogens 2020; 9:pathogens9090708. [PMID: 32867217 PMCID: PMC7558107 DOI: 10.3390/pathogens9090708] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 08/14/2020] [Accepted: 08/25/2020] [Indexed: 01/18/2023] Open
Abstract
Central nervous system invasion by bacteria of the genus Brucella results in an inflammatory disorder called neurobrucellosis. A common feature associated with this pathology is blood-brain barrier (BBB) activation. However, the underlying mechanisms involved with such BBB activation remain unknown. The aim of this work was to investigate the role of Brucella abortus-stimulated platelets on human brain microvascular endothelial cell (HBMEC) activation. Platelets enhanced HBMEC activation in response to B. abortus infection. Furthermore, supernatants from B. abortus-stimulated platelets also activated brain endothelial cells, inducing increased secretion of IL-6, IL-8, CCL-2 as well as ICAM-1 and CD40 upregulation on HBMEC compared with supernatants from unstimulated platelets. Outer membrane protein 19, a B. abortus lipoprotein, recapitulated B. abortus-mediated activation of HBMECs by platelets. In addition, supernatants from B. abortus-activated platelets promoted transendothelial migration of neutrophils and monocytes. Finally, using a pharmacological inhibitor, we demonstrated that the Erk1/2 pathway is involved in the endothelial activation induced by B. abortus-stimulated platelets and also in transendothelial migration of neutrophils. These results describe a mechanism whereby B. abortus-stimulated platelets induce endothelial cell activation, promoting neutrophils and monocytes to traverse the BBB probably contributing to the inflammatory pathology of neurobrucellosis.
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Affiliation(s)
- Ana María Rodríguez
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), CONICET, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires C1120AAD, Argentina; (A.M.R.); (A.P.M.); (M.C.M.); (M.V.D.)
| | - Aldana Trotta
- Instituto de Medicina Experimental (IMEX) (CONICET-Academia Nacional de Medicina), Buenos Aires C1425ASU, Argentina; (A.T.); (P.B.)
| | - Agustina P. Melnyczajko
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), CONICET, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires C1120AAD, Argentina; (A.M.R.); (A.P.M.); (M.C.M.); (M.V.D.)
| | - M. Cruz Miraglia
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), CONICET, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires C1120AAD, Argentina; (A.M.R.); (A.P.M.); (M.C.M.); (M.V.D.)
| | - Kwang Sik Kim
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA;
| | - M. Victoria Delpino
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), CONICET, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires C1120AAD, Argentina; (A.M.R.); (A.P.M.); (M.C.M.); (M.V.D.)
| | - Paula Barrionuevo
- Instituto de Medicina Experimental (IMEX) (CONICET-Academia Nacional de Medicina), Buenos Aires C1425ASU, Argentina; (A.T.); (P.B.)
| | - Guillermo Hernán Giambartolomei
- Instituto de Inmunología, Genética y Metabolismo (INIGEM), CONICET, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires C1120AAD, Argentina; (A.M.R.); (A.P.M.); (M.C.M.); (M.V.D.)
- Correspondence:
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Zavattieri L, Ferrero MC, Alonso Paiva IM, Sotelo AD, Canellada AM, Baldi PC. Brucella abortus Proliferates in Decidualized and Non-Decidualized Human Endometrial Cells Inducing a Proinflammatory Response. Pathogens 2020; 9:pathogens9050369. [PMID: 32408491 PMCID: PMC7281465 DOI: 10.3390/pathogens9050369] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/17/2020] [Accepted: 04/17/2020] [Indexed: 01/18/2023] Open
Abstract
Brucella spp. have been associated with abortion in humans and animals. Although the mechanisms involved are not well established, it is known that placental Brucella infection is accompanied by inflammatory phenomena. The ability of Brucella abortus to infect and survive in human endometrial stromal cells (T-HESC cell line) and the cytokine response elicited were evaluated. B. abortus was able to infect and proliferate in both non-decidualized and decidualized T-HESC cells. Intracellular proliferation depended on the expression of a functional virB operon in the pathogen. B. abortus internalization was inhibited by cytochalasin D and to a lower extent by colchicine, but was not affected by monodansylcadaverine. The infection did not induce cytotoxicity and did not alter the decidualization status of cells. B. abortus infection elicited the secretion of IL-8 and MCP-1 in either decidualized or non-decidualized T-HESC, a response also induced by heat-killed B. abortus and outer membrane vesicles derived from this bacterium. The stimulation of T-HESC with conditioned media from Brucella-infected macrophages induced the production of IL-6, MCP-1 and IL-8 in a dose-dependent manner, and this effect was shown to depend on IL-1β and TNF-α. The proinflammatory responses of T-HESC to B. abortus and to factors produced by infected macrophages may contribute to the gestational complications of brucellosis.
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Affiliation(s)
- Lucía Zavattieri
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (L.Z.); (M.C.F.); (I.M.A.P.); (A.D.S.); (A.M.C.)
- CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Buenos Aires 1033, Argentina
| | - Mariana C. Ferrero
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (L.Z.); (M.C.F.); (I.M.A.P.); (A.D.S.); (A.M.C.)
- CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Buenos Aires 1033, Argentina
| | - Iván M. Alonso Paiva
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (L.Z.); (M.C.F.); (I.M.A.P.); (A.D.S.); (A.M.C.)
- CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Buenos Aires 1033, Argentina
| | - Agustina D. Sotelo
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (L.Z.); (M.C.F.); (I.M.A.P.); (A.D.S.); (A.M.C.)
- CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Buenos Aires 1033, Argentina
| | - Andrea M. Canellada
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (L.Z.); (M.C.F.); (I.M.A.P.); (A.D.S.); (A.M.C.)
- CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Buenos Aires 1033, Argentina
| | - Pablo C. Baldi
- Facultad de Farmacia y Bioquímica, Cátedra de Inmunología, Universidad de Buenos Aires, Buenos Aires 1113, Argentina; (L.Z.); (M.C.F.); (I.M.A.P.); (A.D.S.); (A.M.C.)
- CONICET-Universidad de Buenos Aires, Instituto de Estudios de la Inmunidad Humoral (IDEHU), Buenos Aires 1033, Argentina
- Correspondence: ; Tel.: +54-11-5287-4419
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18
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Li F, Zhai D, Wu Z, Zhao Y, Qiao D, Zhao X. Impairment of the Cell Wall Ligase, LytR-CpsA-Psr Protein (LcpC), in Methicillin Resistant Staphylococcus aureus Reduces Its Resistance to Antibiotics and Infection in a Mouse Model of Sepsis. Front Microbiol 2020; 11:557. [PMID: 32425893 PMCID: PMC7212477 DOI: 10.3389/fmicb.2020.00557] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2020] [Accepted: 03/16/2020] [Indexed: 01/18/2023] Open
Abstract
Staphylococcus aureus is a major opportunistic pathogen, infecting animals, and human beings. The bacterial cell wall plays a crucial role in antimicrobial resistance and its infection to host cells. Peptidoglycans (PGs) are a major component of the cell wall in S. aureus, which is heavily decorated with wall teichoic acids (WTAs) and capsular polysaccharides (CPs). The ligation of WTAs and CPs to PGs is catalyzed by LytR-CpsA-Psr (LCP) family proteins, including LcpA, LcpB, and LcpC. However, the involvement of LcpC in antimicrobial resistance of S. aureus and its infection to host cells remains unknown. By creating the LcpC-knockout strains, we showed that the deficiency in LcpC decreased the antimicrobial resistance to β-lactams and glycopeptides and impeded the binding to various epithelial cells. These changes were accompanied by the morphological changes in bacterial cell wall. More importantly, the knockout of LcpC significantly reduced the pathogenicity of methicillin-resistant S. aureus (MRSA) in mice. Our results suggest that LcpC might be an appealing target for developing a therapeutic approach against MRSA infections.
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Affiliation(s)
- Fan Li
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Dongsheng Zhai
- Department of Pharmacology, School of Pharmacy, Fourth Military Medical University, Xi'an, China
| | - Zhaowei Wu
- College of Animal Science and Technology, Northwest A&F University, Yangling, China.,School of Physical Science and Technology, ShanghaiTech University, Shanghai, China
| | - Yan Zhao
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Dandan Qiao
- College of Animal Science and Technology, Northwest A&F University, Yangling, China
| | - Xin Zhao
- College of Animal Science and Technology, Northwest A&F University, Yangling, China.,Department of Animal Science, McGill University, Montreal, QC, Canada
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Sezgin M, Aydın M, Karakeçili F, Çıkman A, Gülhan B, Arslan YK. Bruselloz Hastalarında Asimetrik Dimetilarjinin (ADMA) Düzeylerinin Araştırılması. DICLE MEDICAL JOURNAL 2019. [DOI: 10.5798/dicletip.620502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
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20
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Miraglia MC, Rodriguez AM, Barrionuevo P, Rodriguez J, Kim KS, Dennis VA, Delpino MV, Giambartolomei GH. Brucella abortus Traverses Brain Microvascular Endothelial Cells Using Infected Monocytes as a Trojan Horse. Front Cell Infect Microbiol 2018; 8:200. [PMID: 29963502 PMCID: PMC6011031 DOI: 10.3389/fcimb.2018.00200] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2018] [Accepted: 05/29/2018] [Indexed: 01/18/2023] Open
Abstract
Neurobrucellosis is an inflammatory disease caused by the invasion of Brucella spp. to the central nervous system (CNS). The pathogenesis of the disease is not well characterized; however, for Brucella to gain access to the brain parenchyma, traversing of the blood-brain barrier (BBB) must take place. To understand the CNS determinants of the pathogenesis of B. abortus, we have used the in vitro BBB model of human brain microvascular endothelial cells (HBMEC) to study the interactions between B. abortus and brain endothelial cells. In this study, we showed that B. abortus is able to adhere and invade HBMEC which was dependent on microtubules, microfilaments, endosome acidification and de novo protein synthesis. After infection, B. abortus rapidly escapes the endosomal compartment of HBMEC and forms a replicative Brucella-containing vacuole that involves interactions with the endoplasmic reticulum. Despite the ability of B. abortus to invade and replicate in HBMEC, the bacterium was unable by itself to traverse HBMEC, but could traverse polarized HBMEC monolayers within infected monocytes. Importantly, infected monocytes that traversed the HBMEC monolayer were a bacterial source for de novo infection of glial cells. This is the first demonstration of the mechanism whereby B. abortus is able to traverse the BBB and infect cells of the CNS. These results may have important implications in our understanding of the pathogenesis of neurobrucellosis.
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Affiliation(s)
- María C Miraglia
- Instituto de Inmunología, Genética y Metabolismo, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Ana M Rodriguez
- Instituto de Inmunología, Genética y Metabolismo, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Paula Barrionuevo
- Instituto de Medicina Experimental, Consejo Nacional de Investigaciones Científicas y Técnicas-Academia Nacional de Medicina, Buenos Aires, Argentina
| | - Julia Rodriguez
- Instituto de Inmunología, Genética y Metabolismo, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Kwang S Kim
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD, United States
| | - Vida A Dennis
- Center for NanoBiotechnology Research and Department of Biological Sciences, Alabama State University, Montgomery, AL, United States
| | - M Victoria Delpino
- Instituto de Inmunología, Genética y Metabolismo, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Guillermo H Giambartolomei
- Instituto de Inmunología, Genética y Metabolismo, Consejo Nacional de Investigaciones Científicas y Técnicas, Universidad de Buenos Aires, Buenos Aires, Argentina
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Wang S, Wang Q, Liu H, Sun S, Sun X, Zhang Y, Wang Z, Cheng Z. Endovascular treatment of thoracic aortic pseudoaneurysm due to brucellosis: a rare case report. BMC Infect Dis 2017; 17:387. [PMID: 28576116 PMCID: PMC5457607 DOI: 10.1186/s12879-017-2485-7] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2016] [Accepted: 05/22/2017] [Indexed: 01/18/2023] Open
Abstract
BACKGROUND Arterial damage is a known complication of brucellosis, but the occurrence of a thoracic aortic pseudoaneurysm secondary to brucellosis has not been previously reported. CASE PRESENTATION A 65-year-old Chinese man presented with a pseudoaneurysm in the descending segment of the thoracic aorta that caused symptoms of chest pain and intermittent fever. He was diagnosed with a thoracic aortic pseudoaneurysm secondary to brucellosis based on a positive brucella serology test (standard-tube agglutination test) and imaging examination (computed tomography angiography). Anti-brucellosis treatment and covered stent graft implantation were attempted to eliminate the brucellosis and pseudoaneurysm, respectively, and were ultimately successful, with no symptoms after 6 months of follow-up. CONCLUSION Endovascular repair may be effective and safe for treating a thoracic aortic pseudoaneurysm resulting from brucellosis.
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Affiliation(s)
- Shuai Wang
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Qi Wang
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Han Liu
- Department of Respiration, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Siqiao Sun
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Xiwei Sun
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Yang Zhang
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Zhongying Wang
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
| | - Zhihua Cheng
- Department of Vascular Surgery, the First Hospital of Jilin University, Xinmin Street 71, Changchun, Jilin, China
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22
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Wang M, Zhu Q, Yang Q, Li W, Wang X, Liu W, Zhou B, Li Z, Yang H. Intestinal brucellosis associated with celiac artery and superior mesenteric artery stenosis and with ileum mucosa and submucosa thickening: A case report. Medicine (Baltimore) 2017; 96:e5893. [PMID: 28079834 PMCID: PMC5266196 DOI: 10.1097/md.0000000000005893] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023] Open
Abstract
RATIONALE Brucellosis is a multisystem infection found worldwide that has a broad range of characteristics, which range from acute fever and hepatomegaly to chronic infections that most commonly affect the central nervous system, cardiovascular system, or skeletal system. Gastrointestinal and splanchnic artery involvements in brucellosis are relatively uncommon. PATIENT CONCERNS We report a case of brucellosis in an adolescent presenting as intermittent abdominal pain, diarrhea, and fever, with intestinal tract involvement. And stenosis of the celiac artery and the superior mesenteric artery was found after exposed to risk factors of Brucella infection. Splanchnic vessels stenosis and an endothelial lesion may exacerbate the prevalent symptom of abdominal pain, as a form of colic pain, occurring after eating. DIAGNOSES The patient was diagnosed as brucellosis. The narrowing of the SMA and CA was suspected to be vasculitis secondary to the brucellosis. INTERVENTIONS The patient was treated with minocycline and rifampicin for 12 weeks totally. OUTCOMES The gastrointestinal manifestations of brucellosis recovered rapidly under intensive treatment. However, follow-up imaging revealed that the superior mesenteric artery and celiac artery stenosis was unimproved. LESSONS In brucellosis, gastrointestinal manifestations may be the only observable features of the disease. Splanchnic arterial stenosis is a rare complication of brucellosis. Sonography and computed tomography may be useful for both diagnosis and follow-up.
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Affiliation(s)
- Miaoqian Wang
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | - Qingli Zhu
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | - Qian Yang
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | - Wenbo Li
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | | | - Wei Liu
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | - Baotong Zhou
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | - Zhenghong Li
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
| | - Hong Yang
- Peking Union Medical College Hospital, Chinese Academy of Medical Sciences
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Abstract
Brucellosis can affect any organ system and result in possible complications. We present an adolescent male who had brucellar aortitis and meningitis simultaneously. Brucellar aortic involvement is a rare complication of brucellosis and can occur without concomitant endocarditis. Here, the patient was managed with prolonged antibiotic therapy without any surgery.
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Miraglia MC, Costa Franco MM, Rodriguez AM, Bellozi PMQ, Ferrari CC, Farias MI, Dennis VA, Barrionuevo P, de Oliveira ACP, Pitossi F, Kim KS, Delpino MV, Oliveira SC, Giambartolomei GH. Glial Cell-Elicited Activation of Brain Microvasculature in Response to Brucella abortus Infection Requires ASC Inflammasome-Dependent IL-1β Production. THE JOURNAL OF IMMUNOLOGY 2016; 196:3794-805. [PMID: 26983788 DOI: 10.4049/jimmunol.1500908] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/17/2015] [Accepted: 02/18/2016] [Indexed: 01/18/2023]
Abstract
Blood-brain barrier activation and/or dysfunction are a common feature of human neurobrucellosis, but the underlying pathogenic mechanisms are largely unknown. In this article, we describe an immune mechanism for inflammatory activation of human brain microvascular endothelial cells (HBMEC) in response to infection with Brucella abortus Infection of HBMEC with B. abortus induced the secretion of IL-6, IL-8, and MCP-1, and the upregulation of CD54 (ICAM-1), consistent with a state of activation. Culture supernatants (CS) from glial cells (astrocytes and microglia) infected with B. abortus also induced activation of HBMEC, but to a greater extent. Although B. abortus-infected glial cells secreted IL-1β and TNF-α, activation of HBMEC was dependent on IL-1β because CS from B. abortus-infected astrocytes and microglia deficient in caspase-1 and apoptosis-associated speck-like protein containing a CARD failed to induce HBMEC activation. Consistently, treatment of CS with neutralizing anti-IL-1β inhibited HBMEC activation. Both absent in melanoma 2 and Nod-like receptor containing a pyrin domain 3 are partially required for caspase-1 activation and IL-1β secretion, suggesting that multiple apoptosis-associated speck-like protein containing CARD-dependent inflammasomes contribute to IL-1β-induced activation of the brain microvasculature. Inflammasome-mediated IL-1β secretion in glial cells depends on TLR2 and MyD88 adapter-like/TIRAP. Finally, neutrophil and monocyte migration across HBMEC monolayers was increased by CS from Brucella-infected glial cells in an IL-1β-dependent fashion, and the infiltration of neutrophils into the brain parenchyma upon intracranial injection of B. abortus was diminished in the absence of Nod-like receptor containing a pyrin domain 3 and absent in melanoma 2. Our results indicate that innate immunity of the CNS set in motion by B. abortus contributes to the activation of the blood-brain barrier in neurobrucellosis and IL-1β mediates this phenomenon.
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Affiliation(s)
- M Cruz Miraglia
- Institute of Immunology, Genetics and Metabolism (National Scientific and Technical Research Council/University of Buenos Aires), Clinical Hospital José de San Martín, Faculty of Medicine, University of Buenos Aires, Buenos Aires C1120AAR, Argentina
| | - Miriam M Costa Franco
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-Minas Gerais 31270-901, Brazil
| | - Ana M Rodriguez
- Institute of Immunology, Genetics and Metabolism (National Scientific and Technical Research Council/University of Buenos Aires), Clinical Hospital José de San Martín, Faculty of Medicine, University of Buenos Aires, Buenos Aires C1120AAR, Argentina
| | - Paula M Q Bellozi
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-Minas Gerais 31270-901, Brazil
| | - Carina C Ferrari
- Leloir Institute Foundation, Biochemical Research Institute of Buenos Aires/National Scientific and Technical Research Council, Buenos Aires C1405BWE, Argentina
| | - Maria I Farias
- Leloir Institute Foundation, Biochemical Research Institute of Buenos Aires/National Scientific and Technical Research Council, Buenos Aires C1405BWE, Argentina
| | - Vida A Dennis
- Center for NanoBiotechnology Research, Alabama State University, Montgomery, AL 36104; and
| | - Paula Barrionuevo
- Institute of Immunology, Genetics and Metabolism (National Scientific and Technical Research Council/University of Buenos Aires), Clinical Hospital José de San Martín, Faculty of Medicine, University of Buenos Aires, Buenos Aires C1120AAR, Argentina
| | - Antonio C P de Oliveira
- Department of Pharmacology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-Minas Gerais 31270-901, Brazil
| | - Fernando Pitossi
- Leloir Institute Foundation, Biochemical Research Institute of Buenos Aires/National Scientific and Technical Research Council, Buenos Aires C1405BWE, Argentina
| | - Kwang Sik Kim
- Division of Pediatric Infectious Diseases, Department of Pediatrics, Johns Hopkins University School of Medicine, Baltimore, MD 21287
| | - M Victoria Delpino
- Institute of Immunology, Genetics and Metabolism (National Scientific and Technical Research Council/University of Buenos Aires), Clinical Hospital José de San Martín, Faculty of Medicine, University of Buenos Aires, Buenos Aires C1120AAR, Argentina
| | - Sergio Costa Oliveira
- Department of Biochemistry and Immunology, Institute of Biological Sciences, Federal University of Minas Gerais, Belo Horizonte-Minas Gerais 31270-901, Brazil
| | - Guillermo H Giambartolomei
- Institute of Immunology, Genetics and Metabolism (National Scientific and Technical Research Council/University of Buenos Aires), Clinical Hospital José de San Martín, Faculty of Medicine, University of Buenos Aires, Buenos Aires C1120AAR, Argentina;
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Hielpos MS, Ferrero MC, Fernández AG, Bonetto J, Giambartolomei GH, Fossati CA, Baldi PC. CCL20 and Beta-Defensin 2 Production by Human Lung Epithelial Cells and Macrophages in Response to Brucella abortus Infection. PLoS One 2015; 10:e0140408. [PMID: 26448160 PMCID: PMC4598116 DOI: 10.1371/journal.pone.0140408] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2015] [Accepted: 09/24/2015] [Indexed: 01/18/2023] Open
Abstract
Both CCL20 and human β-defensin 2 (hBD2) interact with the same membrane receptor and display chemotactic and antimicrobial activities. They are produced by airway epithelia in response to infectious agents and proinflammatory cytokines. Whereas Brucella spp. can infect humans through inhalation, their ability to induce CCL20 and hBD2 in lung cells is unknown. Here we show that B. abortus induces CCL20 expression in human alveolar (A549) or bronchial (Calu-6) epithelial cell lines, primary alveolar epithelial cells, primary human monocytes, monocyte-derived macrophages and the monocytic cell line THP-1. CCL20 expression was mainly mediated by JNK1/2 and NF-kB in both Calu-6 and THP-1 cells. CCL20 secretion was markedly induced in A549, Calu-6 and THP-1 cells by heat-killed B. abortus or a model Brucella lipoprotein (L-Omp19) but not by the B. abortus lipopolysaccharide (LPS). Accordingly, CCL20 production by B. abortus-infected cells was strongly TLR2-dependent. Whereas hBD2 expression was not induced by B. abortus infection, it was significantly induced in A549 cells by conditioned media from B. abortus-infected THP-1 monocytes (CMB). A similar inducing effect was observed on CCL20 secretion. Experiments using blocking agents revealed that IL-1β, but not TNF-α, was involved in the induction of hBD2 and CCL20 secretion by CMB. In the in vitro antimicrobial assay, the lethal dose (LD) 50 of CCL20 for B. abortus (>50 μg/ml) was markedly higher than that against E. coli (1.5 μg/ml) or a B. abortus mutant lacking the O polysaccharide in its LPS (8.7 ug/ml). hBD2 did not kill any of the B. abortus strains at the tested concentrations. These results show that human lung epithelial cells secrete CCL20 and hBD2 in response to B. abortus and/or to cytokines produced by infected monocytes. Whereas these molecules do not seem to exert antimicrobial activity against this pathogen, they could recruit immune cells to the infection site.
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Affiliation(s)
- M Soledad Hielpos
- Instituto de Estudios de la Inmunidad Humoral (IDEHU, CONICET-UBA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Mariana C Ferrero
- Instituto de Estudios de la Inmunidad Humoral (IDEHU, CONICET-UBA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Andrea G Fernández
- Instituto de Estudios de la Inmunidad Humoral (IDEHU, CONICET-UBA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Josefina Bonetto
- Instituto de Estudios de la Inmunidad Humoral (IDEHU, CONICET-UBA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Guillermo H Giambartolomei
- Instituto de Inmunología, Genética y Metabolismo (INIGEM, CONICET-UBA), Hospital de Clínicas "José de San Martín", Buenos Aires, Argentina
| | - Carlos A Fossati
- Instituto de Estudios Inmunológicos y Fisiopatológicos (IIFP, CONICET-UNLP), Facultad de Ciencias Exactas, Universidad Nacional de La Plata, La Plata, Argentina
| | - Pablo C Baldi
- Instituto de Estudios de la Inmunidad Humoral (IDEHU, CONICET-UBA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Buenos Aires, Argentina
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Sabzi F, Vaziri S, Faraji R. Silent Fistula of the Ascending Aorta to Pericardium by Brucella Endocarditis. J Cardiovasc Thorac Res 2015; 7:129-31. [PMID: 26430503 PMCID: PMC4586601 DOI: 10.15171/jcvtr.2015.28] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
We report the case of a 26-year-old male patient with 2-week history of Brucella aortic valve endocarditis that was referred from general hospital to our hospital emergency room with pallor of the skin and mucous membranes accompanied by systemic hypotension and chest pain. Trans esophageal echocardiography (TEE) revealed a 30-mm ascending aorta at the pulmonary trunk with no evidence of the false lumen or intimal flap. TEE also showed a large vegetation of the aortic valve that limited to noncoronary sinus with moderate pericardial effusion. TEE did not showed fistula tract of nonaortic coronary sinus ring to intra mural of aorta and to pericardial cavity. The patient underwent open heart surgery with resection of destructed aortic valve and vegetation and replacement of aortic valve with prosthetic valve (Carbomedics, Sorin group. 23 mm sizes) with separated pledged suture. Debridement of aortic intra mural fistula tract and its replacement with fresh pericardial patch than performed. The pericardial cavity had moderate bloody effusion. The patient recovered uneventfully and was discharged in the 15th postoperative day. In this case, we report a rare silent clinical presentation of aortic wall fistula by vegetation and aortic ring abscess and periaortic wall hematoma, and reviewed its medical and surgical treatment.
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Affiliation(s)
- Feridoun Sabzi
- Preventive Cardiovascular Research Center Kermanshah, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Siavoosh Vaziri
- Department of Infectious Diseases and Tropical Medicine, Imam Reza Hospital, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Reza Faraji
- Yazd Cardiovascular Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Acute Brucellosis with Splenic Infarcts: A Case Report from a Tertiary Care Hospital in Saudi Arabia. Case Rep Infect Dis 2015; 2015:940537. [PMID: 26246924 PMCID: PMC4515537 DOI: 10.1155/2015/940537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2015] [Accepted: 07/02/2015] [Indexed: 01/18/2023] Open
Abstract
Splenic infarction is an extremely rare and unique presentation of brucellosis. Only few cases have been reported worldwide. We here report a case of a young man, presenting with acute onset of fever, left hypochondial pain, and vomiting. Further evaluation revealed multiple splenic infarcts and positive blood culture for brucellosis despite negative transesophageal echocardiography for endocarditis. Significant improvement in clinical symptoms and splenic lesions was achieved after six weeks of combination therapy against brucellosis.
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28
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Tolaj I, Mehmeti M, Ramadani H, Tolaj J, Dedushi K, Fejza H. Brucellosis associated with deep vein thrombosis. Infect Dis Rep 2014; 6:5441. [PMID: 25568754 PMCID: PMC4274400 DOI: 10.4081/idr.2014.5441] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2014] [Revised: 10/12/2014] [Accepted: 10/12/2014] [Indexed: 01/18/2023] Open
Abstract
Over the past 10 years more than 700 cases of brucellosis have been reported in Kosovo, which is heavily oriented towards agriculture and animal husbandry. Here, brucellosis is still endemic and represents an uncontrolled public health problem. Human brucellosis may present with a broad spectrum of clinical manifestations; among them, vascular complications are uncommon. Hereby we describe the case of a 37-year-old male patient with brucellosis complicated by deep vein thrombosis on his left leg.
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Affiliation(s)
- Ilir Tolaj
- Department of Infectious Diseases, University Clinical Center of Kosovo , Prishtina, Kosovo
| | - Murat Mehmeti
- Department of Infectious Diseases, University Clinical Center of Kosovo , Prishtina, Kosovo
| | - Hamdi Ramadani
- Department of Infectious Diseases, University Clinical Center of Kosovo , Prishtina, Kosovo
| | - Jasmina Tolaj
- Department of Obstetrics and Gynecology, University Clinical Center of Kosovo , Prishtina, Kosovo
| | - Kreshnike Dedushi
- Department of Radiology, University Clinical Center of Kosovo , Prishtina, Kosovo
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29
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Mengeloglu Z, Sünnetcioglu M, Tosun M, Kücükbayrak A, Ceylan MR, Baran AI, Karahocagil M, Akdeniz H. High asymmetric dimethylarginine (ADMA) levels in patients with brucellosis. Inflammation 2014; 37:127-31. [PMID: 23978912 DOI: 10.1007/s10753-013-9720-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Asymmetric dimethylarginine (ADMA) is the main endogenous inhibitor of nitric oxide synthase and is considered to be associated with endothelial dysfunction. Brucellosis, a zoonotic disease caused by Brucella spp., can manifest as vasculopathy. The present study was performed to investigate the relationship between ADMA and brucellosis. Serum samples from 39 patients with an accurate diagnosis of brucellosis and from 18 healthy control individuals were included in this study. ADMA levels were significantly higher in the patient group than the controls (P < 0.001). Receiver operating characteristic (ROC) curve analysis indicated that ADMA level ≥ 0.61 had a sensitivity of 79.5 %, specificity of 88.9 %, positive predictive value of 93.9 %, and negative predictive value of 66.7 %. This is the first report of an association between brucellosis and high levels of ADMA. In conclusion, ADMA levels should be tested in brucellosis cases and that further studies to clarify the mechanism underlying the association between ADMA and brucellosis are required.
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Affiliation(s)
- Zafer Mengeloglu
- Department of Medical Microbiology, Abant Izzet Baysal University School of Medicine, Bolu, Turkey,
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30
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Manade VV, Kakrani A, Gadage SN, Misra R. Brucella endocarditis in a non-endemic area presenting as pyrexia of unknown origin. BMJ Case Rep 2014; 2014:bcr-2014-203555. [PMID: 25239983 DOI: 10.1136/bcr-2014-203555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
A 67-year-old man with type 2 diabetes mellitus and hypertension since 7 years presented with a 3-month history of low-grade fever and malaise. Cardiac auscultation revealed the presence of an ejection systolic murmur in the primary aortic area. Most of the investigations for febrile illness were reported normal. His two-dimensional (2D) echocardiogram revealed a calcified aortic valve with mild aortic stenosis. In view of the prolonged fever and calcified aortic valve with mild aortic stenosis, a transoesophageal echocardiogram was performed, which showed small vegetation noted on right coronary cusp about 2.2 mm with free independent mobility. Blood culture was positive for Brucella spp from all the three venepuncture sites. Medical therapy for brucellosis was given with ciprofloxacin, doxycycline, co-trimoxazole and streptomycin, resulting in complete recovery. Brucella endocarditis is a rare, mostly ignored and missed clinical infection. It requires a high index of clinical suspicion for prompt diagnosis and treatment.
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Affiliation(s)
- Vivek Vilas Manade
- Department of Medicine, Padmashree Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, India
| | - Arjun Kakrani
- Department of Medicine, Padmashree Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, India
| | - Siddharth Narayan Gadage
- Department of Medicine, Padmashree Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, India
| | - Rabindra Misra
- Department of Microbiology, Padmashree Dr. D. Y. Patil Medical College, Hospital and Research Centre, Pune, Maharashtra, India
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Herrick JA, Lederman RJ, Sullivan B, Powers JH, Palmore TN. Brucella arteritis: clinical manifestations, treatment, and prognosis. THE LANCET. INFECTIOUS DISEASES 2014; 14:520-6. [PMID: 24480149 PMCID: PMC4498663 DOI: 10.1016/s1473-3099(13)70270-6] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Brucellosis is the most common bacterial zoonosis, and causes a considerable burden of disease in endemic countries. Cardiovascular involvement is the main cause of mortality due to infection with Brucella spp, and most commonly manifests as endocarditis, peripheral and cerebrovascular aneurysms, or arterial and venous thromboses. We report a case of brucellosis presenting as bacteraemia and aortic endarteritis 18 years after the last known exposure to risk factors for brucella infection. The patient was treated with doxycycline, rifampicin, and gentamicin, and underwent surgical repair of a penetrating aortic ulcer, with a good clinical recovery. We review the signs and symptoms, diagnostic approach, prognosis, and treatment of brucella arteritis. We draw attention to the absence of consensus about the optimum therapy for vascular brucellosis, and the urgent need for additional studies and renewed scientific interest in this major pathogen.
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Affiliation(s)
- Jesica A Herrick
- Laboratory of Parasitic Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA.
| | - Robert J Lederman
- Cardiovascular and Pulmonary Branch, National Heart Lung and Blood Institute, Bethesda, MD, USA
| | - Brigit Sullivan
- Office of Research Services, National Institutes of Health, Bethesda, MD, USA
| | - John H Powers
- Scientific Applications International Corporation in support of the Collaborative Clinical Research Branch, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA; George Washington University School of Medicine, Washington, DC, USA
| | - Tara N Palmore
- Laboratory of Clinical Infectious Diseases, National Institute of Allergy and Infectious Diseases, Bethesda, MD, USA
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Klebsiella pneumoniae induces an inflammatory response in an in vitro model of blood-retinal barrier. Infect Immun 2013; 82:851-63. [PMID: 24478098 DOI: 10.1128/iai.00843-13] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
Klebsiella pneumoniae has become an important pathogen in recent years. Although most cases of K. pneumoniae endogenous endophthalmitis occur via hematogenous spread, it is not yet clear which microbial and host factors are responsible for the ability of K. pneumoniae to cross the blood-retinal barrier (BRB). In the present study, we show that in an in vitro model of BRB based on coculturing primary bovine retinal endothelial cells (BREC) and primary bovine retinal pericytes (BRPC), K. pneumoniae infection determines changes of transendothelial electrical resistance (TEER) and permeability to sodium fluorescein. In the coculture model, bacteria are able to stimulate the enzyme activities of endothelial cytosolic and Ca(2+)-independent phospholipase A2s (cPLA2 and iPLA2). These results were confirmed by the incremental expression of cPLA2, iPLA2, cyclo-oxygenase-1 (COX1), and COX2 in BREC, as well as by cPLA2 phosphorylation. In supernatants of K. pneumoniae-stimulated cocultures, increases in prostaglandin E2 (PGE2), interleukin-6 (IL-6), IL-8, and vascular endothelial growth factor (VEGF) production were found. Incubation with K. pneumoniae in the presence of arachidonoyl trifluoromethyl ketone (AACOCF3) or bromoenol lactone (BEL) caused decreased PGE2 and VEGF release. Scanning electron microscopy and transmission electron microscopy images of BREC and BRPC showed adhesion of K. pneumoniae to the cells, but no invasion occurred. K. pneumoniae infection also produced reductions in pericyte numbers; transfection of BREC cocultured with BRPC and of human retinal endothelial cells (HREC) cocultured with human retinal pericytes (HRPC) with small interfering RNAs (siRNAs) targeted to cPLA2 and iPLA2 restored the pericyte numbers and the TEER and permeability values. Our results show the proinflammatory effect of K. pneumoniae on BREC, suggest a possible mechanism by which BREC and BRPC react to the K. pneumoniae infection, and may provide physicians and patients with new ways of fighting blinding diseases.
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Chang Q, Jing H, Sun M, Xu P. Exploring the role of short-course cyclosporin a therapy in preventing homograft valve calcification after transplantation. Cell Immunol 2013; 287:36-45. [PMID: 24374105 DOI: 10.1016/j.cellimm.2013.11.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2013] [Revised: 11/21/2013] [Accepted: 11/27/2013] [Indexed: 01/30/2023]
Abstract
This study was designed to explore the role of short-course cyclosporin A therapy in preventing calcification. Homograft valves heterotopically allografted onto abdominal aorta from SD to Wistar rats. The expression of CD25, CD40L, CD71, calcium content and morphological change were observed. In control group, expression of immune indices got maximal at early stage postoperatively, and then gradually declined, remained at low level 12 weeks afterwards. In test group with Cyclosporin A, the expression of immune indices were lower than that of control group at 2-4 weeks postoperatively, but no significant difference was found 8 weeks afterwards. The calcification began from 4 weeks postoperatively, increased gradually and reached highest level at 12 weeks. In test group calcium content was much lower from 4 to 16 weeks postoperatively. It is concluded that cyclosporine A treatment can prevent calcification of homograft valves because it inhibited immune response at early stage after transplantation.
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Affiliation(s)
- Qing Chang
- Cardiovascular Surgery Department, The Affiliated Hospital of Medical College, Qingdao University, 266003 Qingdao, China.
| | - Hui Jing
- Cardiovascular Surgery Department, The Affiliated Hospital of Medical College, Qingdao University, 266003 Qingdao, China
| | - Mingshu Sun
- Rheumatology Department, The Affiliated Hospital of Medical College, Qingdao University, 266003 Qingdao, China
| | - Ping Xu
- Cardiovascular Surgery Department, The Affiliated Hospital of Medical College, Qingdao University, 266003 Qingdao, China
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Lee KM, Chiu KB, Sansing HA, Didier PJ, Ficht TA, Arenas-Gamboa AM, Roy CJ, Maclean AG. Aerosol-induced brucellosis increases TLR-2 expression and increased complexity in the microanatomy of astroglia in rhesus macaques. Front Cell Infect Microbiol 2013; 3:86. [PMID: 24350061 PMCID: PMC3844859 DOI: 10.3389/fcimb.2013.00086] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2013] [Accepted: 11/07/2013] [Indexed: 01/18/2023] Open
Abstract
Brucella melitensis, a bacterial pathogen and agent of epizootic abortion causes multiple pathologies in humans as well as a number of agriculturally important animal species. Clinical human brucellosis manifests as a non-specific, chronic debilitating disease characterized by undulant fever, arthropathies, cardiomyopathies and neurological sequelae. These symptoms can occur acutely for a few weeks or persist for months to years. Within the brain, endothelial and glial cells can be infected leading to downstream activation events including matrix metalloprotease (MMP) and cytokine secretion and Toll-like receptor (TLR) signaling. These events are likely to lead to tissue remodeling, including morphologic changes in neuronal and glial cells, which are linked to neurological complications including depressive behavior, immune activation and memory loss. Our hypothesis was that B. melitensis infection and neurobrucellosis would lead to activation of astrocytes through upregulation of TLR2 and stimulate concurrent changes in the microanatomy. All six animals were infected via inhalation route. TLR2 expression was approximately doubled in white matter astrocytes of infected rhesus macaques. There was also a 50% increase in the number of astrocytes per unit area in subcortical white matter tracts suggesting increased innate immune activation. This coincided with dramatic increases in the length and complexity of the cell arbor of hypertrophic astrocytes in both cortical gray and white matter. Thus, aerosol-induced brucellosis results in dramatically increased innate immune activation of astrocytes in the absence of widespread neuroinflammation.
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Affiliation(s)
- Kim M Lee
- Program in Biomedical Science, Tulane School of Medicine New Orleans, LA, USA ; Divisions of Comparative Pathology and Microbiology, Tulane National Primate Research Center Covington, LA, USA
| | - Kevin B Chiu
- Department of Biomedical Science, Tulane University New Orleans, LA, USA
| | - Hope A Sansing
- Divisions of Comparative Pathology and Microbiology, Tulane National Primate Research Center Covington, LA, USA
| | - Peter J Didier
- Divisions of Comparative Pathology and Microbiology, Tulane National Primate Research Center Covington, LA, USA
| | - Thomas A Ficht
- Veterinary Pathobiology, Texas A&M University College Station, TX, USA
| | | | - Chad J Roy
- Program in Biomedical Science, Tulane School of Medicine New Orleans, LA, USA ; Divisions of Comparative Pathology and Microbiology, Tulane National Primate Research Center Covington, LA, USA ; Department of Microbiology & Immunology, Tulane School of Medicine New Orleans, LA, USA
| | - Andrew G Maclean
- Program in Biomedical Science, Tulane School of Medicine New Orleans, LA, USA ; Divisions of Comparative Pathology and Microbiology, Tulane National Primate Research Center Covington, LA, USA ; Department of Microbiology & Immunology, Tulane School of Medicine New Orleans, LA, USA
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35
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Brucella Endocarditis. ARCHIVES OF PEDIATRIC INFECTIOUS DISEASES 2013. [DOI: 10.5812/pedinfect.14249] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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36
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Weinhold M, Eisenblätter M, Jasny E, Fehlings M, Finke A, Gayum H, Rüschendorf U, Renner Viveros P, Moos V, Allers K, Schneider T, Schaible UE, Schumann RR, Mielke ME, Ignatius R. The Attenuated Brucella abortus Strain 19 Invades, Persists in, and Activates Human Dendritic Cells, and Induces the Secretion of IL-12p70 but Not IL-23. PLoS One 2013; 8:e65934. [PMID: 23805193 PMCID: PMC3689767 DOI: 10.1371/journal.pone.0065934] [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: 12/05/2012] [Accepted: 05/02/2013] [Indexed: 02/02/2023] Open
Abstract
BACKGROUND Bacterial vectors have been proposed as novel vaccine strategies to induce strong cellular immunity. Attenuated strains of Brucella abortus comprise promising vector candidates since they have the potential to induce strong CD4(+) and CD8(+) T-cell mediated immune responses in the absence of excessive inflammation as observed with other Gram-negative bacteria. However, some Brucella strains interfere with the maturation of dendritic cells (DCs), which is essential for antigen-specific T-cell priming. In the present study, we investigated the interaction of human monocyte-derived DCs with the smooth attenuated B. abortus strain (S) 19, which has previously been employed successfully to vaccinate cattle. METHODOLOGY/PRINCIPAL FINDINGS We first looked into the potential of S19 to hamper the cytokine-induced maturation of DCs; however, infected cells expressed CD25, CD40, CD80, and CD86 to a comparable extent as uninfected, cytokine-matured DCs. Furthermore, S19 activated DCs in the absence of exogeneous stimuli, enhanced the expression of HLA-ABC and HLA-DR, and was able to persist intracellularly without causing cytotoxicity. Thus, DCs provide a cellular niche for persisting brucellae in vivo as a permanent source of antigen. S19-infected DCs produced IL-12/23p40, IL-12p70, and IL-10, but not IL-23. While heat-killed bacteria also activated DCs, soluble mediators were not involved in S19-induced activation of human DCs. HEK 293 transfectants revealed cellular activation by S19 primarily through engagement of Toll-like receptor (TLR)2. CONCLUSIONS/SIGNIFICANCE Thus, as an immunological prerequisite for vaccine efficacy, B. abortus S19 potently infects and potently activates (most likely via TLR2) human DCs to produce Th1-promoting cytokines.
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Affiliation(s)
- Mario Weinhold
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Martin Eisenblätter
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Edith Jasny
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Michael Fehlings
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | | | - Hermine Gayum
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Ursula Rüschendorf
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Pablo Renner Viveros
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Institute of Tropical Medicine and International Health, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | - Verena Moos
- Medical Clinic I, Charité – Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - Kristina Allers
- Medical Clinic I, Charité – Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - Thomas Schneider
- Medical Clinic I, Charité – Universitätsmedizin Berlin, Campus Benjamin Franklin, Berlin, Germany
| | - Ulrich E. Schaible
- Research Center Borstel, Department of Molecular Infection Research, Borstel, Germany
| | - Ralf R. Schumann
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
| | | | - Ralf Ignatius
- Institute of Microbiology and Hygiene, Department of Infection Immunology, Charité – Universitätsmedizin Berlin, Berlin, Germany
- Institute of Tropical Medicine and International Health, Charité – Universitätsmedizin Berlin, Berlin, Germany
- * E-mail:
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Redundant effects of ketamine on the pathogenesis and severity of Brucella abortus infection. Comp Immunol Microbiol Infect Dis 2013; 36:71-81. [DOI: 10.1016/j.cimid.2012.10.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2012] [Revised: 09/13/2012] [Accepted: 10/03/2012] [Indexed: 01/18/2023]
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Barrionuevo P, Delpino MV, Pozner RG, Velásquez LN, Cassataro J, Giambartolomei GH. Brucella abortus induces intracellular retention of MHC-I molecules in human macrophages down-modulating cytotoxic CD8(+) T cell responses. Cell Microbiol 2012; 15:487-502. [PMID: 23107169 DOI: 10.1111/cmi.12058] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 10/15/2012] [Accepted: 10/22/2012] [Indexed: 01/18/2023]
Abstract
Brucella abortus elicits a vigorous Th1 immune response which activates cytotoxic T lymphocytes. However, B. abortus persists in its hosts in the presence of CD8(+) T cells, establishing a chronic infection. Here, we report that B. abortus infection of human monocytes/macrophages inhibited the IFN-γ-induced MHC-I cell surface expression. This phenomenon was dependent on metabolically active viable bacteria. MHC-I down-modulation correlated with the development of diminished CD8(+) cytotoxic T cell response as evidenced by the reduced expression of the activation marker CD107a on CD8(+) T lymphocytes and a diminished percentage of IFN-γ-producing CD8(+) T cells. Inhibition of MHC-I expression was not due to changes in protein synthesis. Rather, we observed that upon B. abortus infection MHC-I molecules were retained within the Golgi apparatus. Overall, these results describe a novel mechanism based on the intracellular sequestration of MHC-I molecules whereby B. abortus would avoid CD8(+) cytotoxic T cell responses, evading their immunological surveillance.
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Affiliation(s)
- Paula Barrionuevo
- Instituto de Estudios de la Inmunidad Humoral (CONICET/UBA), Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires (UBA), Buenos Aires, Argentina; Instituto de Inmunología, Genética y Metabolismo, Hospital de Clínicas 'José de San Martín', (CONICET/UBA), Buenos Aires, Argentina
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Kim DH, Son BG, Lim JJ, Lee JJ, Kim DG, Lee HJ, Min W, Rhee MH, Kim KD, Chang HH, Kim S. The role of a Brucella abortus lipoprotein in intracellular replication and pathogenicity in experimentally infected mice. Microb Pathog 2012; 54:34-9. [PMID: 23006628 DOI: 10.1016/j.micpath.2012.09.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Revised: 08/11/2012] [Accepted: 09/10/2012] [Indexed: 01/18/2023]
Abstract
Brucella abortus, the causative agent of brucellosis, can survive and replicate within host cells. Understanding bacterial virulence factors and bacteria-host cell interactions is critical for controlling brucellosis. However, little is known regarding the pathogenic mechanisms of brucellosis. A lipoprotein mutant (Gene Bank ID: 3339351) of B. abortus showed a lower rate of intracellular replication than did the wild-type strain in HeLa cells and RAW 264.7 macrophages. The adherent activity of the lipoprotein mutant was slightly increased compared to that of the wild-type strain in HeLa cells. After infection into macrophages, the lipoprotein mutant co-localized with either late endosomes or lysosomes. In mice infected with the lipoprotein mutant, fewer lipoprotein mutants were recovered from the spleen at 8 weeks post-infection compared to the wild-type strain. The ability to protect the lipoprotein mutant against infection by the virulent B. abortus strain 544 was similar to that of strain RB51. Our results indicate that the B. abortus lipoprotein is an important factor for survival within phagocytes and mice, and the B. abortus lipoprotein mutant may help improve live vaccines used to control brucellosis.
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Affiliation(s)
- Dong Hyeok Kim
- College of Veterinary Medicine, Gyeongsang National University, Jinju 660-701, Republic of Korea
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A case of Brucella endocarditis in association with subclavian artery thrombosis. Case Rep Infect Dis 2012; 2012:581489. [PMID: 22844622 PMCID: PMC3400327 DOI: 10.1155/2012/581489] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2012] [Accepted: 06/21/2012] [Indexed: 01/18/2023] Open
Abstract
Brucellosis is a common zoonosis, endemic in Mediterranean countries, and caused by bacteria of Brucella genus. Brucellosis is a systemic infection and the clinical presentation varies widely from asymptomatic and mild to severe disease. Cardiovascular complications are extremely rare. We present a case of arterial thrombosis in a previously healthy young patient with Brucella endocarditis. Careful attention must be paid to any sign or symptom of thrombosis in patients affected by brucellosis, regardless of the presence of endocarditis and cardiovascular risk factors.
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Seidl K, Solis NV, Bayer AS, Hady WA, Ellison S, Klashman MC, Xiong YQ, Filler SG. Divergent responses of different endothelial cell types to infection with Candida albicans and Staphylococcus aureus. PLoS One 2012; 7:e39633. [PMID: 22745797 PMCID: PMC3382135 DOI: 10.1371/journal.pone.0039633] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2012] [Accepted: 05/27/2012] [Indexed: 01/18/2023] Open
Abstract
Endothelial cells are important in the pathogenesis of bloodstream infections caused by Candida albicans and Staphylococcus aureus. Numerous investigations have used human umbilical vein endothelial cells (HUVECs) to study microbial-endothelial cell interactions in vitro. However, the use of HUVECs requires a constant supply of umbilical cords, and there are significant donor-to-donor variations in these endothelial cells. The use of an immortalized endothelial cell line would obviate such difficulties. One candidate in this regard is HMEC-1, an immortalized human dermal microvascular endothelial cell line. To determine if HMEC-1 cells are suitable for studying the interactions of C. albicans and S. aureus with endothelial cells in vitro, we compared the interactions of these organisms with HMEC-1 cells and HUVECs. We found that wild-type C. albicans had significantly reduced adherence to and invasion of HMEC-1 cells as compared to HUVECs. Although wild-type S. aureus adhered to and invaded HMEC-1 cells similarly to HUVECs, an agr mutant strain had significantly reduced invasion of HMEC-1 cells, but not HUVECs. Furthermore, HMEC-1 cells were less susceptible to damage induced by C. albicans, but more susceptible to damage caused by S. aureus. In addition, HMEC-1 cells secreted very little IL-8 in response to infection with either organism, whereas infection of HUVECs induced substantial IL-8 secretion. This weak IL-8 response was likely due to the anatomic site from which HMEC-1 cells were obtained because infection of primary human dermal microvascular endothelial cells with C. albicans and S. aureus also induced little increase in IL-8 production above basal levels. Thus, C. albicans and S. aureus interact with HMEC-1 cells in a substantially different manner than with HUVECs, and data obtained with one type of endothelial cell cannot necessarily be extrapolated to other types.
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Affiliation(s)
- Kati Seidl
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
- University Hospital Zurich, University of Zurich, Zurich, Switzerland
| | - Norma V. Solis
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
| | - Arnold S. Bayer
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
- David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Wessam Abdel Hady
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
| | - Steven Ellison
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
- Department of Biology, California State University-Dominguez Hills, Carson, California, United States of America
| | - Meredith C. Klashman
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
| | - Yan Q. Xiong
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
- David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
| | - Scott G. Filler
- Los Angeles Biomedical Research Institute at Harbor-UCLA Medical Center, Torrance, California, United States of America
- David Geffen School of Medicine at UCLA, Los Angeles, California, United States of America
- * E-mail:
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Ferrero MC, Fossati CA, Rumbo M, Baldi PC. Brucella invasion of human intestinal epithelial cells elicits a weak proinflammatory response but a significant CCL20 secretion. ACTA ACUST UNITED AC 2012; 66:45-57. [PMID: 22553918 DOI: 10.1111/j.1574-695x.2012.00985.x] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Revised: 04/27/2012] [Accepted: 04/30/2012] [Indexed: 01/18/2023]
Abstract
In spite of the frequent acquisition of Brucella infection by the oral route in humans, the interaction of the bacterium with cells of the intestinal mucosa has been poorly studied. Here, we show that different Brucella species can invade human colonic epithelial cell lines (Caco-2 and HT-29), in which only smooth species can replicate efficiently. Infection with smooth strains did not produce a significant cytotoxicity, while the rough strain RB51 was more cytotoxic. Infection of Caco-2 cells or HT-29 cells with either smooth or rough strains of Brucella did not result in an increased secretion of TNF-α, IL-1β, MCP-1, IL-10 or TGF-β as compared with uninfected controls, whereas all the infections induced the secretion of IL-8 and CCL20 by both cell types. The MCP-1 response to flagellin from Salmonella typhimurium was similar in Brucella-infected or uninfected cells, ruling out a bacterial inhibitory mechanism as a reason for the weak proinflammatory response. Infection did not modify ICAM-1 expression levels in Caco-2 cells, but increased them in HT-29 cells. These results suggest that Brucella induces only a weak proinflammatory response in gut epithelial cells, but produces a significant CCL20 secretion. The latter may be important for bacterial dissemination given the known ability of Brucella to survive in dendritic cells.
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Affiliation(s)
- Mariana C Ferrero
- Instituto de Estudios de la Inmunidad Humoral, Facultad de Farmacia y Bioquímica, Universidad de Buenos Aires, Argentina
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Posadas DM, Ruiz-Ranwez V, Bonomi HR, Martín FA, Zorreguieta A. BmaC, a novel autotransporter of Brucella suis, is involved in bacterial adhesion to host cells. Cell Microbiol 2012; 14:965-82. [PMID: 22321605 DOI: 10.1111/j.1462-5822.2012.01771.x] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
Brucella is an intracellular pathogen responsible of a zoonotic disease called brucellosis. Brucella survives and proliferates within several types of phagocytic and non-phagocytic cells. Like in other pathogens, adhesion of brucellae to host surfaces was proposed to be an important step in the infection process. Indeed, Brucella has the capacity to bind to culture human cells and key components of the extracellular matrix, such as fibronectin. However, little is known about the molecular bases of Brucella adherence. In an attempt to identify bacterial genes encoding adhesins, a phage display library of Brucella suis was panned against fibronectin. Three fibronectin-binding proteins of B. suis were identified using this approach. One of the candidates, designated BmaC was a very large protein of 340 kDa that is predicted to belong to the type I (monomeric) autotransporter family. Microscopy studies showed that BmaC is located at one pole on the bacterial surface. The phage displaying the fibronectin-binding peptide of BmaC inhibited the attachment of brucellae to both, HeLa cells and immobilized fibronectin in vitro. In addition, a bmaC deletion mutant was impaired in the ability of B. suis to attach to immobilized fibronectin and to the surface of HeLa and A549 cells and was out-competed by the wild-type strain in co-infection experiments. Finally, anti-fibronectin or anti-BmaC antibodies significantly inhibited the binding of wild-type bacteria to HeLa cells. Our results highlight the role of a novel monomeric autotransporter protein in the adhesion of B. suis to the extracellular matrix and non-phagocytic cells via fibronectin binding.
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Affiliation(s)
- Diana M Posadas
- Fundación Instituto Leloir, IIBBA CONICET and FCEyN, Universidad de Buenos Aires, Patricias Argentinas 435, (C1405BWE) Buenos Aires, Argentina
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