1
|
Fernandes DC, Eto SF, Baldassi AC, Balbuena TS, Charlie-Silva I, de Andrade Belo MA, Pizauro JM. Meningitis caused by Aeromonas hydrophila in Oreochromis niloticus: Proteomics and druggability of virulence factors. FISH & SHELLFISH IMMUNOLOGY 2024; 151:109687. [PMID: 38866348 DOI: 10.1016/j.fsi.2024.109687] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/18/2024] [Revised: 05/30/2024] [Accepted: 06/08/2024] [Indexed: 06/14/2024]
Abstract
Meningitis caused by Gram-negative bacteria is a serious public health problem, causing morbidity and mortality in both children and adults. Here, we propose a novel experimental model using Nile tilapia (Oreochromis niloticus) to study neuroinflammation. The fish were infected with Aeromonas hydrophila, and the course of infection was monitored in the peripheral blood. Septicemia was obvious in the blood, while in the brain tissue, infection of the meninges was present. The histopathological examination showed suppurative meningitis, and the cellular immune response in the brain tissue during infection was mediated by microglia. These cells were morphologically characterized and phenotyped by MHC class II markers and CD68. The increased production of TNF-α, IL-1β and iNOS supported the infiltration of these cells during the neuroinflammatory process. In the proteomic analysis of A. hydrophila isolated from brain tissue, we found chemotactic and transport proteins, proteolytic enzymes and enzymes associated with the dismutation of nitric oxide (NO), as well as motor proteins and those responsible for cell division. After characterizing the most abundant proteins during the course of infection, we investigated the druggability index of these proteins and identified promising peptide sequences as molecular targets that are similar among bacteria. Thus, these findings deepened the understanding of the pathophysiology of meningitis caused by A. hydrophila. Moreover, through the proteomics analysis, important mechanisms and pathways used by the pathogen to subvert the host response were revealed, providing insights for the development of novel antibiotics and vaccines.
Collapse
Affiliation(s)
- Dayanne Carla Fernandes
- Institute of Chemistry, São Paulo State University (Unesp), Araraquara, Sao Paulo, SP, Brazil.
| | - Silas Fernandes Eto
- Laboratory Center of Excellence in New Target Discovery (CENTD) Special Laboratory, Butantan Institute, São Paulo, SP, Brazil
| | - Amanda Cristina Baldassi
- Department of Technology, School of Agrarian and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, Sao Paulo, SP, Brazil
| | - Thiago Santana Balbuena
- Department of Technology, School of Agrarian and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, Sao Paulo, SP, Brazil
| | - Ives Charlie-Silva
- Institute of Chemistry, São Paulo State University (Unesp), Araraquara, Sao Paulo, SP, Brazil
| | | | - João Martins Pizauro
- Department of Technology, School of Agrarian and Veterinary Sciences, São Paulo State University (Unesp), Jaboticabal, Sao Paulo, SP, Brazil
| |
Collapse
|
2
|
You YF, Chen M, Tang Y, Yu WX, Pang XW, Chu YH, Zhang H, Shang K, Deng G, Zhou LQ, Yang S, Wang W, Xiao J, Tian DS, Qin C. TREM2 deficiency inhibits microglial activation and aggravates demyelinating injury in neuromyelitis optica spectrum disorder. J Neuroinflammation 2023; 20:89. [PMID: 37013543 PMCID: PMC10069075 DOI: 10.1186/s12974-023-02772-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2023] [Accepted: 03/27/2023] [Indexed: 04/05/2023] Open
Abstract
Neuromyelitis optica spectrum disorder (NMOSD) is an inflammatory demyelinating disorder of the central nervous system (CNS) triggered by autoimmune mechanisms. Microglia are activated and play a pivotal role in response to tissue injury. Triggering receptor expressed on myeloid cells 2 (TREM2) is expressed by microglia and promotes microglial activation, survival and phagocytosis. Here, we identify a critical role for TREM2 in microglial activation and function during AQP4-IgG and complement-induced demyelination. TREM2-deficient mice had more severe tissue damage and neurological impairment, as well as fewer oligodendrocytes with suppressed proliferation and maturation. The number of microglia clustering in NMOSD lesions and their proliferation were reduced in TREM2-deficient mice. Moreover, morphology analysis and expression of classic markers showed compromised activation of microglia in TREM2-deficient mice, which was accompanied by suppressed phagocytosis and degradation of myelin debris by microglia. These results overall indicate that TREM2 is a key regulator of microglial activation and exert neuroprotective effects in NMOSD demyelination.
Collapse
Affiliation(s)
- Yun-Fan You
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Man Chen
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yue Tang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Wen-Xiang Yu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Xiao-Wei Pang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Yun-Hui Chu
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Hang Zhang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Ke Shang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Gang Deng
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Luo-Qi Zhou
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Sheng Yang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Wei Wang
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China
| | - Jun Xiao
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China.
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Dai-Shi Tian
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China.
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China.
| | - Chuan Qin
- Department of Neurology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, 430030, People's Republic of China.
- Hubei Key Laboratory of Neural Injury and Functional Reconstruction, Huazhong University of Science and Technology, Wuhan, 430030, China.
| |
Collapse
|
3
|
Giammalva GR, Brunasso L, Paolini F, Costanzo R, Bonosi L, Benigno UE, Ferini G, Sava S, Colarossi C, Umana GE, Gerardi RM, Sturiale CL, Albanese A, Iacopino DG, Maugeri R. The Long and Winding Road: An Overview of the Immunological Landscape of Intracranial Meningiomas. Cancers (Basel) 2022; 14:cancers14153639. [PMID: 35892898 PMCID: PMC9367534 DOI: 10.3390/cancers14153639] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2022] [Revised: 07/22/2022] [Accepted: 07/23/2022] [Indexed: 12/26/2022] Open
Abstract
Simple Summary The tumor microenvironment represents the essential basis for characterizing oncological cells and supporting their growth. Along with genomic sequencing, the study of the tumor microenvironment represents a big step forward in oncological research and in the customization of treatments. Compared to gliomas, for which research has discovered greater results, the correlation between the microenvironment and tumor phenotype, and consequent prognostic implications, are still incompletely understood for intracranial meningioma. Recently, studies about the immunogenetic landscape of meningiomas have been promoted, and it is now clear that understanding the multifactorial pathogenesis of meningioma and its correlation with other specific signs (i.e., PTBE) could lead to the development of new targeted therapies, and significantly affect meningioma patients’ prognosis. Abstract The role of immunotherapy is gaining ever-increasing interest in the neuro-oncological field, and this is also expanding to the management of intracranial meningioma. Meningiomas are still the most common primary adult tumor of the CNS, and even though surgery and/or radiotherapy still represent cornerstones of their treatment, recent findings strongly support the potential role of specific immune infiltrate cells, their features and genomics, for the application of personalized treatments and prognostic implications. According to the PRISMA guidelines, systematic research in the most updated platform was performed in order to provide a descriptive and complete overview about the characteristics, role and potential implications of immunology in meningioma tumors. Seventy articles were included and analyzed in the present paper. The meningioma microenvironment reveals complex immune tumor-immune cells interactions that may definitely influence tumor progression, as well as offering unexpected opportunities for treatment.
Collapse
Affiliation(s)
- Giuseppe Roberto Giammalva
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
- Correspondence: (G.R.G.); (L.B.); Tel.: +39-0916554656 (G.R.G.)
| | - Lara Brunasso
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
- Correspondence: (G.R.G.); (L.B.); Tel.: +39-0916554656 (G.R.G.)
| | - Federica Paolini
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| | - Roberta Costanzo
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| | - Lapo Bonosi
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| | - Umberto Emanuele Benigno
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| | - Gianluca Ferini
- Department of Radiation Oncology, REM Radioterapia Srl, 95125 Catania, Italy;
| | - Serena Sava
- Department of Medical Oncology, Istituto Oncologico del Mediterraneo, 95029 Viagrande, Italy;
| | - Cristina Colarossi
- Pathology Unit, Department of Experimental Oncology, Mediterranean Institute of Oncology, 95029 Viagrande, Italy;
| | - Giuseppe Emmanuele Umana
- Department of Neurosurgery, Cannizzaro Hospital, Trauma Center, Gamma Knife Center, 95125 Catania, Italy;
| | - Rosa Maria Gerardi
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| | - Carmelo Lucio Sturiale
- Department of Neurosurgery, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (C.L.S.); (A.A.)
| | - Alessio Albanese
- Department of Neurosurgery, Fondazione Policlinico Universitario “A. Gemelli” IRCCS, Università Cattolica del Sacro Cuore, 00168 Rome, Italy; (C.L.S.); (A.A.)
| | - Domenico Gerardo Iacopino
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| | - Rosario Maugeri
- Neurosurgical Clinic, AOUP “Paolo Giaccone”, Post Graduate Residency Program in Neurologic Surgery, Department of Biomedicine Neurosciences and Advanced Diagnostics, School of Medicine, University of Palermo, 90127 Palermo, Italy; (F.P.); (R.C.); (L.B.); (U.E.B.); (R.M.G.); (D.G.I.); (R.M.)
| |
Collapse
|
4
|
Ube2c-inhibition alleviated amyloid pathology and memory deficits in APP/PS1 mice model of AD. Prog Neurobiol 2022; 215:102298. [PMID: 35671859 DOI: 10.1016/j.pneurobio.2022.102298] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2021] [Revised: 04/24/2022] [Accepted: 06/01/2022] [Indexed: 11/21/2022]
Abstract
Autophagy is a major intracellular degradation pathway for the clearance of damaged organelles and misfolded peptides. Previous studies have indicated that autophagy is involved in the pathogenesis of neurodegenerative disease including Alzheimer's disease (AD). Defective autophagy and highly expressed ubiquitin-conjugating enzyme 2C (Ube2c) have been found in AD patients and mouse. However, little is known about the regulation of autophagy in AD. The association of Ube2c with autophagy, amyloid pathology and cognitive deficits in AD remains unclear. In the present study, we characterized over expression of Ube2c and declined autophagy in amyloid β (Aβ)-treated microglia and demonstrated the protective effects of agomelatine (AGO) in APP/PS1 mice. We found that knockdown of Ube2c with AAV2 encoding shUbe2c resulted in an obvious enhancement of autophagy in BV2 microglia cells, and an alleviation of Aβ pathology and memory deficits in APP/PS1 mice. Further, pharmacological inhibition of Ube2c by AGO significantly reduced Aβ plaques, improved synaptic plasticity and cognitive behaviors in APP/PS1 mice, as well as promoted autophagy in microglia. Our findings uncover a potent role of Ube2c over-expression and autophagy decline in the pathogenesis of AD, and suggest that regulation of Ube2c and autophagy may provide an important clue and a potential target for the novel therapeutics of AD.
Collapse
|
5
|
Eto SF, Fernandes DC, Baldassi AC, Balbuena TS, da Costa Alecrim JV, Almeida de Carvalho FC, Lima C, Lopes-Ferreira M, Pizauro JM. Proteomic analysis capsule synthesis and redox mechanisms in the intracellular survival of group B Streptococcus in fish microglia. FISH & SHELLFISH IMMUNOLOGY 2021; 118:34-50. [PMID: 34464686 DOI: 10.1016/j.fsi.2021.08.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/21/2021] [Revised: 06/20/2021] [Accepted: 08/18/2021] [Indexed: 06/13/2023]
Abstract
Group B Streptococcus (GBS) causes meningitis in neonates and Nile tilapia (Oreochromis niloticus). The molecular mechanisms regulating the intracellular survival of this pathogen in the host cell are complex and crucial for the progression of infection. Thus, we propose the use of GBS-infected Nile tilapia microglia as an in vitro model system simulating infection caused by homologous bacteria in humans. We used this model to evaluate the phagocytic activity, as well as the functional aspects of the capsular proteins A, B, C, and D and the major redox enzymes, and the synergistic role of mechanisms/proteins involved in blocking phagocytic process. We observed that in the intracellular phase, GBS showed enhanced synthesis of the polysaccharide capsule and used superoxide dismutase, thioredoxin, NADH oxidase, and alkyl hydroperoxide reductase to scavenge reactive oxygen species and reactive nitrogen species produced by the host cell. Furthermore, although these virulence mechanisms were effective during the initial hours of infection, they were not able to subvert microglial responses, which partially neutralized the infection. Altogether, our findings provided important information regarding the intracellular survival mechanisms of GBS and perspectives for the production of new drugs and vaccines, through the druggability analysis of specific proteins. In conclusion, tilapia microglia serve as a potent in vitro experimental model for the study of meningitis.
Collapse
Affiliation(s)
- Silas Fernandes Eto
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista, 69310-000, Brazil.
| | - Dayanne Carla Fernandes
- Immunochemistry Laboratory, Butantan Institute, (CeTICs/FAPESP), Vital Brazil Avenue, 1500, Butantã, 05503-009, São Paulo, Brazil
| | - Amanda Cristina Baldassi
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal, 14884-900, Sao Paulo/ SP, Brazil
| | - Thiago Santana Balbuena
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal, 14884-900, Sao Paulo/ SP, Brazil
| | - João Victor da Costa Alecrim
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista, 69310-000, Brazil
| | | | - Carla Lima
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CeTICs/FAPESP), Butantan Institute, Vital Brazil Avenue, 1500, Butantã, 05503-009, São Paulo, Brazil
| | - Monica Lopes-Ferreira
- Immunoregulation Unit of the Laboratory of Applied Toxinology (CeTICs/FAPESP), Butantan Institute, Vital Brazil Avenue, 1500, Butantã, 05503-009, São Paulo, Brazil
| | - João Martins Pizauro
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal, 14884-900, Sao Paulo/ SP, Brazil
| |
Collapse
|
6
|
Eto SF, Fernandes DC, Funnicelli MIG, Alecrim JVC, Souza PG, Carvalho FCA, Belo MAA, Pizauro JM. Microglia extracellular traps in Oreochromis niloticus infected with Weissella cibaria. FISH & SHELLFISH IMMUNOLOGY 2021; 113:148-153. [PMID: 33838222 DOI: 10.1016/j.fsi.2021.03.020] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/11/2021] [Revised: 03/08/2021] [Accepted: 03/29/2021] [Indexed: 06/12/2023]
Abstract
The mechanism of extracellular traps (ETs) is important in the cellular response against bacteria. Thus, in the present study, we describe for the first time the capacity of the Nile tilapia (Oreochromis niloticus) microglia in the formation of ETs in Weissella cibaria in vitro infection. Thus, we evaluated the ultrastructure of the microglia culture and observed the formation of ETs 6 h after stimulation with lipopolysaccharide (LPS) and during the course of infection. Our results shed light on the mechanism of formation of ETs in the microglia of teleost fish and the ability of W. cibaria to infect these cells.
Collapse
Affiliation(s)
- Silas F Eto
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), 69310-000, Boa Vista, Brazil.
| | - Dayanne C Fernandes
- Immunochemistry Laboratory, Butantan Institute, (CeTICS/FAPESP), 05503-900, São Paulo, Brazil
| | - Michelli I G Funnicelli
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), 14884-900, Jaboticabal, São Paulo, Brazil
| | - João V C Alecrim
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), 69310-000, Boa Vista, Brazil
| | - Pedro G Souza
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), 69310-000, Boa Vista, Brazil
| | - Fabíola C A Carvalho
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), 69310-000, Boa Vista, Brazil
| | - Marco A A Belo
- Laboratory of Animal Pharmacology and Toxicology, University of Brazil, 13690-000, Descalvado, Brazil; Department of Preventive Veterinary Medicine of Unesp, School of Agrarian and Veterinary Sciences, São Paulo State University (Unesp), 14884-900, Jaboticabal, Brazil
| | - João M Pizauro
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), 14884-900, Jaboticabal, São Paulo, Brazil
| |
Collapse
|
7
|
Eto SF, Fernandes DC, de Moraes AC, Alecrim JVDC, de Souza PG, de Carvalho FCA, Charlie-Silva I, Belo MADA, Pizauro JM. Meningitis Caused by Streptococcus agalactiae in Nile Tilapia ( Oreochromis niloticus): Infection and Inflammatory Response. Animals (Basel) 2020; 10:ani10112166. [PMID: 33233716 PMCID: PMC7699960 DOI: 10.3390/ani10112166] [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: 09/27/2020] [Revised: 11/01/2020] [Accepted: 11/02/2020] [Indexed: 12/12/2022] Open
Abstract
Simple Summary Streptococcus agalactiae (group B Streptococcus, GBS) is the main pathological agent in meningitis in Nile tilapia (Oreochromis niloticus). In this study, we describe the mechanism of infection and the immune response in the brain tissue of experimentally infected tilapia. This study understanding of the pathophysiology of meningitis in this species and bring the possibility of using tilapia as a study model for meningitis. Abstract Streptococcus agalactiae (Sta) of Lancefield group B is the primary etiological agent of bacterial meningitis in Nile tilapia and newborn humans. Thus, the study of this disease is of fundamental importance for aquaculture and human medicine. Additionally, elucidation of the mechanisms involved in the host–pathogenic response is important for the success of new therapies. In the present study, we elucidated important aspects of the innate immune response in the brain tissue of Nile tilapia (Oreochromis niloticus) infected by Sta. The neuroinflammatory process in the meninges started with the migration of MHC class II and CD68 + cells, production of TNF-alpha, and the effective immune response to Sta was mediated by the increased iNOs+. In conclusion, the present study brings a partial understanding of the pathophysiological and neuroinflammatory mechanisms in meningitis in Sta infected tilapia, enabling important advances in the therapy of this disease as well as the possibility of using this biological model to understand human meningitis.
Collapse
Affiliation(s)
- Silas Fernandes Eto
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista 69310-000, Brazil; (J.V.d.C.A.); (P.G.d.S.); (F.C.A.d.C.)
- Correspondence:
| | | | | | - João Victor da Costa Alecrim
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista 69310-000, Brazil; (J.V.d.C.A.); (P.G.d.S.); (F.C.A.d.C.)
| | - Pedro Galdino de Souza
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista 69310-000, Brazil; (J.V.d.C.A.); (P.G.d.S.); (F.C.A.d.C.)
| | - Fabíola Christian Almeida de Carvalho
- Department of Postgraduate in Health Sciences-PROCISA, Federal University of Roraima (UFRR), Boa Vista 69310-000, Brazil; (J.V.d.C.A.); (P.G.d.S.); (F.C.A.d.C.)
| | - Ives Charlie-Silva
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, ICB-USP, São Paulo 01222-010, Brazil;
| | - Marco Antonio de Andrade Belo
- Department of Preventive Veterinary Medicine of Unesp, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal 14884-900, Brazil;
- Laboratory of Animal Pharmacology and Toxicology, University of Brazil, Descalvado 13690-000, Brazil
| | - João Martins Pizauro
- Department of Technology, School of Agrarian and Veterinary Sciences, Sao Paulo State University (Unesp), Jaboticabal 14884-900, Brazil;
| |
Collapse
|
8
|
Furlan JC, Liu Y, Dietrich WD, Norenberg MD, Fehlings MG. Age as a determinant of inflammatory response and survival of glia and axons after human traumatic spinal cord injury. Exp Neurol 2020; 332:113401. [PMID: 32673621 DOI: 10.1016/j.expneurol.2020.113401] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 06/20/2020] [Accepted: 07/09/2020] [Indexed: 01/09/2023]
Abstract
Despite the shift in the demographics of traumatic spinal cord injury (SCI) with increased proportion of injuries in the elderly, little is known on the potential effects of old age on the pathobiology of SCI. Since there is an assumption that age adversely affects neural response to SCI, this study examines the clinically relevant question on whether age is a key determinant of inflammatory response, oligodendroglial apoptosis and axonal survival after traumatic SCI. This unique study includes post-mortem spinal cord tissue from 64 cases of SCI (at cervical or high-thoracic levels) and 38 control cases without CNS injury. Each group was subdivided into subgroups of younger and elderly individuals (65 years of age or older at the SCI onset). The results of this study indicate that age at the SCI onset does not adversely affect the cellular inflammatory response to, oligodendroglial apoptosis and axonal survival after SCI. These results support the conclusion that elderly individuals have similar neurobiological responses to SCI as younger people and, hence, treatment decisions should be based on an assessment of the individual patient and not an arbitrary assumption that "advanced age" should exclude patients with an acute SCI from access to advanced care and translational therapies.
Collapse
Affiliation(s)
- Julio C Furlan
- Department of Medicine, Division of Physical Medicine and Rehabilitation, University of Toronto, Toronto, Ontario, Canada; Lyndhurst Centre, KITE - Toronto Rehabilitation Institute, University Health Network, Toronto, Ontario, Canada; Krembil Research Institute, University Health Network, Toronto, Ontario, Canada.
| | - Yang Liu
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada
| | - W Dalton Dietrich
- Department of Neurological Surgery, Neurology, and Cell Biology & Anatomy, University of Miami, Miami, Florida, USA; Miami Project to Cure Paralysis, Miami, Florida, USA
| | - Michael D Norenberg
- Miami Project to Cure Paralysis, Miami, Florida, USA; Department of Neuropathology, University of Miami, Leonard M. Miller School of Medicine, Miami, Florida, USA
| | - Michael G Fehlings
- Krembil Research Institute, University Health Network, Toronto, Ontario, Canada; Department of Surgery, Division of Neurosurgery, University of Toronto, Toronto, Ontario, Canada
| |
Collapse
|
9
|
Bi WL, Wu WW, Santagata S, Reardon DA, Dunn IF. Checkpoint inhibition in meningiomas. Immunotherapy 2017; 8:721-31. [PMID: 27197540 DOI: 10.2217/imt-2016-0017] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Meningiomas are increasingly appreciated to share similar features with other intra-axial central nervous system neoplasms as well as systemic cancers. Immune checkpoint inhibition has emerged as a promising therapy in a number of cancers, with durable responses of years in a subset of patients. Several lines of evidence support a role for immune-based therapeutic strategies in the management of meningiomas, especially high-grade subtypes. Meningiomas frequently originate juxtaposed to venous sinuses, where an anatomic conduit for lymphatic drainage resides. Multiple populations of immune cells have been observed in meningiomas. PD-1/PD-L1 mediated immunosuppression has been implicated in high-grade meningiomas, with association between PD-L1 expression with negative prognostic outcome. These data point to the promise of future combinatorial therapeutic strategies in meningioma.
Collapse
Affiliation(s)
- Wenya Linda Bi
- Department of Neurosurgery, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Winona W Wu
- Department of Neurosurgery, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - Sandro Santagata
- Department of Pathology, Division of Neuropathology, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
| | - David A Reardon
- Center for Neuro-Oncology, Dana-Farber Cancer Institute, Harvard Medical School, Boston, MA, USA
| | - Ian F Dunn
- Department of Neurosurgery, Brigham & Women's Hospital, Harvard Medical School, Boston, MA, USA
| |
Collapse
|
10
|
Abstract
Although activation of the innate and adaptive arms of the immune system are undoubtedly involved in the pathophysiology of neurodegenerative diseases, it is unclear whether immune system activation is a primary or secondary event. Increasingly, published studies link primary metabolic stress to secondary inflammatory responses inside and outside of the nervous system. In this study, we show that the metabolic stress pathway known as the unfolded protein response (UPR) leads to secondary activation of the immune system. First, we observe innate immune system activation in autopsy specimens from Pelizaeus-Merzbacher disease (PMD) patients and mouse models stemming from PLP1 gene mutations. Second, missense mutations in mildly- and severely-affected Plp1-mutant mice exhibit immune-associated expression profiles with greater disease severity causing an increasingly proinflammatory environment. Third, and unexpectedly, we find little evidence for dysregulated expression of major antioxidant pathways, suggesting that the unfolded protein and oxidative stress responses are separable. Together, these data show that UPR activation can precede innate and/or adaptive immune system activation and that neuroinflammation can be titrated by metabolic stress in oligodendrocytes. Whether or not such activation leads to autoimmune disease in humans is unclear, but the case report of steroid-mitigated symptoms in a PMD patient initially diagnosed with multiple sclerosis lends support.
Collapse
|
11
|
Hoozemans JJM, Rozemuller AJM, van Haastert ES, Eikelenboom P, van Gool WA. Neuroinflammation in Alzheimer's disease wanes with age. J Neuroinflammation 2011; 8:171. [PMID: 22152162 PMCID: PMC3248382 DOI: 10.1186/1742-2094-8-171] [Citation(s) in RCA: 68] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2011] [Accepted: 12/07/2011] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Inflammation is a prominent feature in Alzheimer's disease (AD). It has been proposed that aging has an effect on the function of inflammation in the brain, thereby contributing to the development of age-related diseases like AD. However, the age-dependent relationship between inflammation and clinical phenotype of AD has never been investigated. METHODS In this study we have analysed features of the neuroinflammatory response in clinically and pathologically confirmed AD and control cases in relation to age (range 52-97 years). The mid-temporal cortex of 19 controls and 19 AD cases was assessed for the occurrence of microglia and astrocytes by immunohistochemistry using antibodies directed against CD68 (KP1), HLA class II (CR3/43) and glial fibrillary acidic protein (GFAP). RESULTS By measuring the area density of immunoreactivity we found significantly more microglia and astrocytes in AD cases younger than 80 years compared to older AD patients. In addition, the presence of KP1, CR3/43 and GFAP decreases significantly with increasing age in AD. CONCLUSION Our data suggest that the association between neuroinflammation and AD is stronger in relatively young patients than in the oldest patients. This age-dependent relationship between inflammation and clinical phenotype of AD has implications for the interpretation of biomarkers and treatment of the disease.
Collapse
Affiliation(s)
- Jeroen JM Hoozemans
- Department of Pathology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Annemieke JM Rozemuller
- Department of Pathology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Elise S van Haastert
- Department of Pathology, VU University Medical Center, P.O. Box 7057, 1007 MB Amsterdam, The Netherlands
| | - Piet Eikelenboom
- Department of Psychiatry, VU University Medical Center, Valeriusplein 9, 1075 BG Amsterdam, The Netherlands
- Department of Neurology, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands
| | - Willem A van Gool
- Department of Neurology, Academic Medical Center, University of Amsterdam, P.O. Box 22660, 1100 DD Amsterdam, The Netherlands
| |
Collapse
|
12
|
Kim JE, Ryu HJ, Yeo SI, Kang TC. P2X7 receptor regulates leukocyte infiltrations in rat frontoparietal cortex following status epilepticus. J Neuroinflammation 2010; 7:65. [PMID: 20939924 PMCID: PMC2964655 DOI: 10.1186/1742-2094-7-65] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2010] [Accepted: 10/12/2010] [Indexed: 11/18/2022] Open
Abstract
BACKGROUND In the present study, we investigated the roles of P2X7 receptor in recruitment and infiltration of neutrophil during epileptogenesis in rat epilepsy models. METHODS Status epilepticus (SE) was induced by pilocarpine in rats that were intracerebroventricularly infused with either saline, 2',3'-O-(4-benzoylbenzoyl)-adenosine 5'-triphosphate (BzATP), adenosine 5'-triphosphate-2',3'-dialdehyde (OxATP), or IL-1Ra (interleukin 1 receptor antagonist) prior to SE induction. Thereafter, we performed immunohistochemical studies for myeloperoxidase (MPO), CD68, interleukin-1β (IL-1β), monocyte chemotactic protein-1 (MCP-1) and macrophage inflammatory protein-2 (MIP-2). RESULTS In saline-infused animals, neutrophils and monocytes were observed in frontoparietal cortex (FPC) at 1 day and 2 days after SE, respectively. In BzATP-infused animals, infiltrations of neutrophils and monocytes into the FPC were detected at 12 hr and 1 day after SE, respectively. In OxATP-infused animals, neutrophils and monocytes infiltrated into the FPC at 1 day and 2 days after SE, respectively. However, the numbers of both classes of leukocytes were significantly lower than those observed in the saline-infused group. In piriform cortex (PC), massive leukocyte infiltration was detected in layers III/IV of saline-infused animals at 1-4 days after induction of SE. BzATP or OxATP infusion did not affect neutrophil infiltration in the PC. In addition, P2X7 receptor-mediated MCP-1 (released from microglia)/MIP-2 (released from astrocytes) regulation was related to SE-induced leukocyte infiltration in an IL-1β-independent manner. CONCLUSIONS Our findings suggest that selective regulation of P2X7 receptor-mediated neutrophil infiltration may provide new therapeutic approaches to SE or epilepsy.
Collapse
Affiliation(s)
- Ji-Eun Kim
- Department of Anatomy and Neurobiology, Institute of Epilepsy Research, College of Medicine, Hallym University, Chunchon 200-702, South Korea
| | - Hea Jin Ryu
- Department of Anatomy and Neurobiology, Institute of Epilepsy Research, College of Medicine, Hallym University, Chunchon 200-702, South Korea
| | - Seong-Il Yeo
- Department of Anatomy and Neurobiology, Institute of Epilepsy Research, College of Medicine, Hallym University, Chunchon 200-702, South Korea
| | - Tae-Cheon Kang
- Department of Anatomy and Neurobiology, Institute of Epilepsy Research, College of Medicine, Hallym University, Chunchon 200-702, South Korea
| |
Collapse
|
13
|
Caffo M, Caruso G, Galatioto S, Meli F, Cacciola F, Germanò A, Alafaci C, Tomasello F. Immunohistochemical study of the extracellular matrix proteins laminin, fibronectin and type IV collagen in secretory meningiomas. J Clin Neurosci 2008; 15:806-11. [PMID: 18474427 DOI: 10.1016/j.jocn.2007.05.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2007] [Revised: 04/28/2007] [Accepted: 05/29/2007] [Indexed: 11/19/2022]
Abstract
The extracellular matrix plays a pivotal role in numerous cellular functions during normal and pathological processes. Secretory meningiomas are rare histological meningioma subtypes that have benign behavior, are highly vascularized and are frequently accompanied by massive peritumoral edema. The aim of this study was to assess in secretory meningiomas the immunohistochemical expression of laminin, fibronectin and type IV collagen, proteins found in the extracellular matrix. Extracellular matrix proteins were evaluated in samples from six secretory meningiomas using a semiquantitative scale ranging from not detected (0) to marked (3). Laminin expression was not detected in two cases, but was minimal in one, moderate in one and marked in the remaining cases. Fibronectin expression was absent in two cases, minimal in two, moderate in one and marked with generalized distribution in the remaining case. Type IV collagen expression was minimal in three cases, moderate in two and marked with generalized distribution in the remaining case. Our results are indicative of significant neoangiogenic activity. Meningiomas increase in size through increased production of extracellular matrix; furthermore, the proliferation of cells typically associated with neoplasia requires considerable interaction with the extracellular matrix.
Collapse
Affiliation(s)
- Mariella Caffo
- Neurosurgical Clinic, Department of Neuroscience, Psychiatry and Anesthesiology, School of Medicine, University of Messina, A.O.U. Policlinico G. Martino Via Consolare Valeria, 1, 98125 Messina, Italy
| | | | | | | | | | | | | | | |
Collapse
|
14
|
Lemstra AW, Groen in't Woud JCM, Hoozemans JJM, van Haastert ES, Rozemuller AJM, Eikelenboom P, van Gool WA. Microglia activation in sepsis: a case-control study. J Neuroinflammation 2007; 4:4. [PMID: 17224051 PMCID: PMC1783646 DOI: 10.1186/1742-2094-4-4] [Citation(s) in RCA: 151] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 01/15/2007] [Indexed: 02/02/2023] Open
Abstract
Background infection induces an acute phase response that is accompanied by non-specific symptoms collectively named sickness behavior. Recent observations suggest that microglial cells play a role in mediating behavioral changes in systemic infections. In animal models for sepsis it has been shown that after inducing lipopolysaccharide, LPS, microglia in the brain were activated. The aim of this study was to investigate whether activation of microglia can be detected in patients who died of sepsis. Methods in a case-control study brain tissue of 13 patients who died with sepsis was compared with that of 17 controls. Activated microglia were identified by expression of MHC-class II antigens and CD68. Microglia activation was analyzed by a semiquantitative score combining both the number of the immunoreactive cells and their morphology. Results in patients who died with sepsis there was a significant increase in activated microglia in the grey matter when stained with CD68 compared to controls. This effect was independent of the effect of age. Conclusion this study shows for the first time in human brain tissue an association between a systemic infection and activation of microglia in the brain. Activated microglia during sepsis could play a role in behavioral changes associated with systemic infection.
Collapse
Affiliation(s)
- Afina W Lemstra
- Department of Neurology, Academic Medical Centre, PO Box 22660, 1100DDAmsterdam, The Netherlands
| | | | - Jeroen JM Hoozemans
- Department of Neuropathology, Academic Medical Centre, PO Box 22660, 1100DDAmsterdam, The Netherlands
| | - Elise S van Haastert
- Department of Neuropathology, Academic Medical Centre, PO Box 22660, 1100DDAmsterdam, The Netherlands
| | - Annemiek JM Rozemuller
- Department of Neuropathology, Academic Medical Centre, PO Box 22660, 1100DDAmsterdam, The Netherlands
| | - Piet Eikelenboom
- Department of Neurology, Academic Medical Centre, PO Box 22660, 1100DDAmsterdam, The Netherlands
| | - Willem A van Gool
- Department of Neurology, Academic Medical Centre, PO Box 22660, 1100DDAmsterdam, The Netherlands
| |
Collapse
|