1
|
Badawi AH, Mohamad NA, Stanslas J, Kirby BP, Neela VK, Ramasamy R, Basri H. In Vitro Blood-Brain Barrier Models for Neuroinfectious Diseases: A Narrative Review. Curr Neuropharmacol 2024; 22:1344-1373. [PMID: 38073104 PMCID: PMC11092920 DOI: 10.2174/1570159x22666231207114346] [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: 09/12/2022] [Revised: 11/04/2022] [Accepted: 11/25/2022] [Indexed: 05/16/2024] Open
Abstract
The blood-brain barrier (BBB) is a complex, dynamic, and adaptable barrier between the peripheral blood system and the central nervous system. While this barrier protects the brain and spinal cord from inflammation and infection, it prevents most drugs from reaching the brain tissue. With the expanding interest in the pathophysiology of BBB, the development of in vitro BBB models has dramatically evolved. However, due to the lack of a standard model, a range of experimental protocols, BBB-phenotype markers, and permeability flux markers was utilized to construct in vitro BBB models. Several neuroinfectious diseases are associated with BBB dysfunction. To conduct neuroinfectious disease research effectively, there stems a need to design representative in vitro human BBB models that mimic the BBB's functional and molecular properties. The highest necessity is for an in vitro standardised BBB model that accurately represents all the complexities of an intact brain barrier. Thus, this in-depth review aims to describe the optimization and validation parameters for building BBB models and to discuss previous research on neuroinfectious diseases that have utilized in vitro BBB models. The findings in this review may serve as a basis for more efficient optimisation, validation, and maintenance of a structurally- and functionally intact BBB model, particularly for future studies on neuroinfectious diseases.
Collapse
Affiliation(s)
- Ahmad Hussein Badawi
- Department of Neurology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Nur Afiqah Mohamad
- Department of Neurology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
- Centre for Foundation Studies, Lincoln University College, 47301, Petaling Jaya, Selangor, Malaysia
| | - Johnson Stanslas
- Department of Medicine, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Brian Patrick Kirby
- School of Pharmacy and Biomolecular Sciences, RCSI University of Medicine and Health Sciences, Dublin, Ireland
| | - Vasantha Kumari Neela
- Department of Medical Microbiology and Parasitology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Rajesh Ramasamy
- Department of Pathology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| | - Hamidon Basri
- Department of Neurology, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, 43400, Serdang, Selangor, Malaysia
| |
Collapse
|
2
|
Hu Y, Cui F, Wang S, Liu C, Zhang S, Wang R, Song J, Zhang Y. MicroRNA expression profile of human umbilical vein endothelial cells in response to coxsackievirus A10 infection reveals a potential role of miR-143-3p in maintaining the integrity of the blood-brain barrier. Front Cell Infect Microbiol 2023; 13:1217984. [PMID: 37577373 PMCID: PMC10419304 DOI: 10.3389/fcimb.2023.1217984] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2023] [Accepted: 07/12/2023] [Indexed: 08/15/2023] Open
Abstract
Coxsackievirus A10 (CV-A10) has been one of the main etiologies of hand, foot, and mouth disease (HFMD) epidemics in recent years and can cause mild to severe illness and even death. Most of these severe and fatal cases were closely associated with neurological impairments, but the potential mechanism of neuropathological injury triggered by CV-A10 infection has not been elucidated. MicroRNAs (miRNAs), implicated in the regulation of gene expression in a post-transcriptional manner, play a vital role in the pathogenesis of various central nervous system (CNS) diseases; therefore, they serve as diagnostic biomarkers and are emerging as novel therapeutic targets for CNS injuries. To gain insights into the CV-A10-induced regulation of host miRNA-processing machinery, we employed high-throughput sequencing to identify differentially expressed miRNAs in CV-A10-infected human umbilical vein endothelial cells (HUVECs) and further analyzed the potential functions of these miRNAs during CV-A10 infection. The results showed that CV-A10 infection could induce 189 and 302 significantly differentially expressed miRNAs in HUVECs at 24 and 72 hpi, respectively, compared with the uninfected control. Moreover, the expression of four selected miRNAs and their relevant mRNAs was determined to verify the sequencing data by quantitative reverse transcription-polymerase chain reaction (RT-qPCR) methods. After that, gene target prediction and functional annotation revealed that the targets of these dysregulated miRNAs were mostly enriched in cell proliferation, signal transduction, cAMP signalling pathway, cellular response to interleukin-6, ventral spinal cord interneuron differentiation, negative regulation of glial cell differentiation, neuron migration, positive regulation of neuron projection development, etc., which were primarily involved in the processes of basic physiology, host immunity, and neurological impairments and further reflected vital regulatory roles of miRNA in viral pathogenicity. Finally, the construction of a miRNA-regulated network also suggested that the complex regulatory mechanisms mediated by miRNAs might be involved in viral pathogenesis and virus-host interactions during CV-A10 infection. Furthermore, among these dysregulated miRNAs, miR-143-3p was demonstrated to be involved in the maintenance of blood-brain barrier (BBB) integrity.
Collapse
Affiliation(s)
- Yajie Hu
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
- Yunnan Provincial Key Laboratory of Clinical Virology, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Fengxian Cui
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- Department of Thoracic Surgery, The First People’s Hospital of Yunnan Province, Kunming, China
| | - Shenglan Wang
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Chen Liu
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Shengxiong Zhang
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Ruiqi Wang
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| | - Jie Song
- Institute of Medical Biology, Chinese Academy of Medical Science and Peking Union Medical College, Yunnan Key Laboratory of Vaccine Research and Development on Severe Infectious Diseases, Kunming, China
| | - Yunhui Zhang
- Department of Pulmonary and Critical Care Medicine, The First People’s Hospital of Yunnan Province, Kunming, China
- The Affiliated Hospital of Kunming University of Science and Technology, Kunming, Yunnan, China
| |
Collapse
|
3
|
Yang S, Jin H, Zhao Z. An ECV304 monoculture model for permeability assessment of blood-brain barrier. Neurol Res 2017; 40:117-121. [PMID: 29100486 DOI: 10.1080/01616412.2017.1398882] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
OBJECTIVE ECV304/C6 co-culture model is a widely used tool for BBB studies. However, cell source may influence the establishment of co-culture model and some C6 cells could damage the barrier integrity. Here, we established an ECV304 monoculture model and evaluated it in the respect of tightness, tight junction proteins and discriminative brain penetration. METHODS The tightness of ECV304 cell layers was evaluated by the measurement of permeability to hydrophilic marker Lucifer yellow. Immunofluorescence method was explored to detect the expression of tight junction proteins occludin, claudin-5 and ZO-1 in ECV304 cells. The discriminative brain penetration of the model was assessed by a permeability testing of compounds with different penetration rates, including digoxin, quinidine, and propranolol. RESULTS The ECV304 monolayers developed low permeability to Lucifer yellow (permeability coefficient: 0.31 ± 0.02 × 10-3 cm/min) and exhibited positive immunostaining of occludin, claudin-5 and ZO-1. The permeability coefficients of high permeable quinidine and propranolol across ECV304 cell layers were higher than that of low permeable digoxin by 3.6 and 2.8-fold, respectively. CONCLUSIONS The ECV304 monoculture model developed tight paracellular barrier and discriminated between compounds with different permeability, indicating it as a potential in vitro model for BBB permeability assessment.
Collapse
Affiliation(s)
- Shu Yang
- a Department of Pharmacy, Beijing Tiantan Hospital , Capital Medical University , Beijing , China
| | - Hong Jin
- b Institute of Disease Prevention and Control of PLA , Beijing , China
| | - Zhigang Zhao
- a Department of Pharmacy, Beijing Tiantan Hospital , Capital Medical University , Beijing , China
| |
Collapse
|
4
|
Epi/perineural and Schwann Cells as Well as Perineural Sheath Integrity are Affected Following 2,4-D Exposure. Neurotox Res 2017; 32:624-638. [PMID: 28699141 DOI: 10.1007/s12640-017-9777-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2016] [Revised: 06/24/2017] [Accepted: 06/28/2017] [Indexed: 01/18/2023]
Abstract
2,4-dicholorophenoxy acetic acid (2,4-D) is a worldwide-known hormone herbicide. However, there are increasing concerns about its exposure and risks of developing pathological conditions for the peripheral nervous system. The aim of this study was to investigate the mechanism(s) involved in the toxicity of 2,4-D on peripheral nerve's cellular components. The epi/perineural and Schwann cells and a total of three cell lines were treated with 2,4-D. The viability of cells at different doses of 2,4-D was measured by MTT assay. The cell cycle analyses, cumulative cell counting, fluorescent staining, antioxidant and caspase enzymes activity were examined on epi/perineural and Schwann cells. The epi/perineural cells were assessed as having biological macromolecular changes. Some tight junction-related genes and proteins were also tested on explants of 2,4-D treated epi/perineural tissue. The viability of 2,4-D treated cells was reduced in a dose-dependent manner. Reduced growth rate and G1 cell cycle arrest were verified in 2,4-D treated epi/perineural and Schwann cells. The use of staining methods (acridine orange/ethidium bromide and DAPI) and caspase 3/7 activity assay along with malondialdehyde, glutathione peroxidase, and superoxide dismutase activity assays indicated the apoptotic and oxidant effects of 2,4-D on epi/perineural and Schwann cells. Data obtained from FTIR revealed changes in epi/perineural proteins and cell membrane lipids. Additionally, claudin-1, occludin, and ZO-1 gene/protein expression profiles were significantly reduced in 2,4-D-treated epi/perineural pieces. Our data indicated that oxidative stress, apoptosis of epi/perineural and Schwann cell and impaired blood-nerve barrier may have contributed to nerve damage following 2,4-D exposure.
Collapse
|
5
|
Namayanja M, Dai Y, Nerima B, Matovu E, Lun ZR, Lubega GW, Zhengjun C. Trypanosoma brucei brucei traverses different biological barriers differently and may modify the host plasma membrane in the process. Exp Parasitol 2016; 174:31-41. [PMID: 28011167 DOI: 10.1016/j.exppara.2016.12.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2016] [Revised: 12/07/2016] [Accepted: 12/16/2016] [Indexed: 10/20/2022]
Abstract
Trypanosoma brucei are extracellular hemoflagellate protozoan parasites and one of the causative agents of a devastating zoonotic disease called African Trypanosomiasis. In humans, the disease is caused by Trypanosoma brucei rhodensiense and Trypanosoma brucei gambiense, which cross the blood brain barrier (BBB) causing neurological disorders which culminate in death if untreated. In some domestic animals and laboratory rodents, Trypanosoma brucei brucei causes a disease similar to that in humans. The mechanism by which Trypanosoma brucei brucei invade biological barriers including the BBB has not been fully elucidated. To further address this issue, Mardin Dardy Canine Kidney II (MDCKII) and Human dermal microvascular endothelial cell (HDMEC) monolayers were grown to confluence on transwell inserts to constitute in vitro biological barriers. MDCKII cells were chosen for their ability to form tight junctions similar to those formed by the BBB endothelial cells. Labeled trypanosomes were placed in the upper chamber of transwell inserts layered with confluent MDCKII/HDMEC monolayers and their ability to cross the monolayer over time evaluated. Our results show that only 0.5-1.25% of Trypanosoma brucei brucei were able to migrate across the monolayers after 3 h. By employing immune-staining and confocal microscopic analysis we observed that trypanosomes were located at the tight junctions and inside the cell in the MDCK II monolayers indicating that they crossed the monolayer using both the paracellular and transcellular routes. Our observations also showed that there seemed to be no obvious degradation of junction proteins Zonula Ocludens-1, Occludin and Ecadherin. In the HDMEC cell monolayer, our scanning electron microscopy data showed that Trypanosoma brucei brucei is able to modulate the plasma membrane to form invaginations similar to cuplike structures formed by Tlymphocytes. However these structures seemed to be independent of vascular adhesion molecules suggesting that they could be more like the membrane ruffles formed by certain intracellular bacteria during invasion. Taken together, our data reveal a mechanism by which Trypanosoma brucei brucei is able to cross different biological barriers including the BBB without causing any obvious damage.
Collapse
Affiliation(s)
- Monica Namayanja
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-yang Road, 200031, Shanghai, China; Molecular Biology Laboratory, School of Biotechnical, Biosecurity and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, P. O. Box 7062, Kampala, Uganda.
| | - Yan Dai
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-yang Road, 200031, Shanghai, China
| | - Barbara Nerima
- Molecular Biology Laboratory, School of Biotechnical, Biosecurity and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, P. O. Box 7062, Kampala, Uganda
| | - Enock Matovu
- Molecular Biology Laboratory, School of Biotechnical, Biosecurity and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, P. O. Box 7062, Kampala, Uganda
| | - Zhao-Rong Lun
- Centre for Parasitic Organisms, School of Life Sciences, Sun Yat-Sen University, Guangzhou, 510276, China
| | - George W Lubega
- Molecular Biology Laboratory, School of Biotechnical, Biosecurity and Laboratory Sciences, College of Veterinary Medicine, Animal Resources and Biosecurity, Makerere University, P. O. Box 7062, Kampala, Uganda
| | - Chen Zhengjun
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Shanghai Institutes for Biological Sciences, Chinese Academy of Sciences, 320 Yue-yang Road, 200031, Shanghai, China
| |
Collapse
|
6
|
Laperchia C, Palomba M, Seke Etet PF, Rodgers J, Bradley B, Montague P, Grassi-Zucconi G, Kennedy PGE, Bentivoglio M. Trypanosoma brucei Invasion and T-Cell Infiltration of the Brain Parenchyma in Experimental Sleeping Sickness: Timing and Correlation with Functional Changes. PLoS Negl Trop Dis 2016; 10:e0005242. [PMID: 28002454 PMCID: PMC5217973 DOI: 10.1371/journal.pntd.0005242] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Revised: 01/06/2017] [Accepted: 12/07/2016] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND The timing of Trypanosoma brucei entry into the brain parenchyma to initiate the second, meningoencephalitic stage of human African trypanosomiasis or sleeping sickness is currently debated and even parasite invasion of the neuropil has been recently questioned. Furthermore, the relationship between neurological features and disease stage are unclear, despite the important diagnostic and therapeutic implications. METHODOLOGY Using a rat model of chronic Trypanosoma brucei brucei infection we determined the timing of parasite and T-cell neuropil infiltration and its correlation with functional changes. Parasite DNA was detected using trypanosome-specific PCR. Body weight and sleep structure alterations represented by sleep-onset rapid eye movement (SOREM) periods, reported in human and experimental African trypanosomiasis, were monitored. The presence of parasites, as well as CD4+ and CD8+ T-cells in the neuropil was assessed over time in the brain of the same animals by immunocytochemistry and quantitative analyses. PRINCIPAL FINDINGS Trypanosome DNA was present in the brain at day 6 post-infection and increased more than 15-fold by day 21. Parasites and T-cells were observed in the parenchyma from day 9 onwards. Parasites traversing blood vessel walls were observed in the hypothalamus and other brain regions. Body weight gain was reduced from day 7 onwards. SOREM episodes started in most cases early after infection, with an increase in number and duration after parasite neuroinvasion. CONCLUSION These findings demonstrate invasion of the neuropil over time, after an initial interval, by parasites and lymphocytes crossing the blood-brain barrier, and show that neurological features can precede this event. The data thus challenge the current clinical and cerebrospinal fluid criteria of disease staging.
Collapse
Affiliation(s)
- Claudia Laperchia
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Maria Palomba
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Paul F. Seke Etet
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Jean Rodgers
- Institute of Biodiversity Animal Health and Comparative Medicine, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Barbara Bradley
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Paul Montague
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Gigliola Grassi-Zucconi
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
| | - Peter G. E. Kennedy
- Institute of Infection, Immunity and Inflammation, University of Glasgow, Glasgow, Scotland, United Kingdom
| | - Marina Bentivoglio
- Department of Neuroscience, Biomedicine and Movement Sciences, University of Verona, Verona, Italy
- National Institute of Neuroscience (INN), Verona Unit, Verona, Italy
| |
Collapse
|
7
|
Bennani-Baiti B, Toegel S, Viernstein H, Urban E, Noe CR, Bennani-Baiti IM. Inflammation Modulates RLIP76/RALBP1 Electrophile-Glutathione Conjugate Transporter and Housekeeping Genes in Human Blood-Brain Barrier Endothelial Cells. PLoS One 2015; 10:e0139101. [PMID: 26406496 PMCID: PMC4583384 DOI: 10.1371/journal.pone.0139101] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2015] [Accepted: 09/09/2015] [Indexed: 12/22/2022] Open
Abstract
Endothelial cells are often present at inflammation sites. This is the case of endothelial cells of the blood-brain barrier (BBB) of patients afflicted with neurodegenerative disorders such as Alzheimer's, Parkinson's, or multiple sclerosis, as well as in cases of bacterial meningitis, trauma, or tumor-associated ischemia. Inflammation is a known modulator of gene expression through the activation of transcription factors, mostly NF-κB. RLIP76 (a.k.a. RALBP1), an ATP-dependent transporter of electrophile-glutathione conjugates, modulates BBB permeability through the regulation of tight junction function, cell adhesion, and exocytosis. Genes and pathways regulated by RLIP76 are transcriptional targets of tumor necrosis factor alpha (TNF-α) pro-inflammatory molecule, suggesting that RLIP76 may also be an inflammation target. To assess the effects of TNF-α on RLIP76, we faced the problem of choosing reference genes impervious to TNF-α. Since such genes were not known in human BBB endothelial cells, we subjected these to TNF-α, and measured by quantitative RT-PCR the expression of housekeeping genes commonly used as reference genes. We find most to be modulated, and analysis of several inflammation datasets as well as a metaanalysis of more than 5000 human tissue samples encompassing more than 300 cell types and diseases show that no single housekeeping gene may be used as a reference gene. Using three different algorithms, however, we uncovered a reference geneset impervious to TNF-α, and show for the first time that RLIP76 expression is induced by TNF-α and follows the induction kinetics of inflammation markers, suggesting that inflammation can influence RLIP76 expression at the BBB. We also show that MRP1 (a.k.a. ABCC1), another electrophile-glutathione transporter, is not modulated in the same cells and conditions, indicating that RLIP76 regulation by TNF-α is not a general property of glutathione transporters. The reference geneset uncovered herein should aid in future gene expression studies in inflammatory conditions of the BBB.
Collapse
Affiliation(s)
- Barbara Bennani-Baiti
- Department for Medicinal Chemistry, Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
- Department of Biomedical Imaging and Image-guided Therapy, Vienna General Hospital (AKH), Medical University of Vienna, Waehringer-Guertel 18–20, 1090 Vienna, Austria
| | - Stefan Toegel
- Karl Chiari Lab for Orthopaedic Biology, Department of Orthopaedics, Medical University of Vienna, Waehringer Guertel 18–20, 1090 Vienna, Austria
| | - Helmut Viernstein
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Ernst Urban
- Department for Medicinal Chemistry, Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | - Christian R. Noe
- Department for Medicinal Chemistry, Institute of Pharmaceutical Chemistry, University of Vienna, Althanstrasse 14, 1090 Vienna, Austria
| | | |
Collapse
|
8
|
Bergmann S, Steinert M. From Single Cells to Engineered and Explanted Tissues: New Perspectives in Bacterial Infection Biology. INTERNATIONAL REVIEW OF CELL AND MOLECULAR BIOLOGY 2015; 319:1-44. [PMID: 26404465 DOI: 10.1016/bs.ircmb.2015.06.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Cell culture techniques are essential for studying host-pathogen interactions. In addition to the broad range of single cell type-based two-dimensional cell culture models, an enormous amount of coculture systems, combining two or more different cell types, has been developed. These systems enable microscopic visualization and molecular analyses of bacterial adherence and internalization mechanisms and also provide a suitable setup for various biochemical, immunological, and pharmacological applications. The implementation of natural or synthetical scaffolds elevated the model complexity to the level of three-dimensional cell culture. Additionally, several transwell-based cell culture techniques are applied to study bacterial interaction with physiological tissue barriers. For keeping highly differentiated phenotype of eukaryotic cells in ex vivo culture conditions, different kinds of microgravity-simulating rotary-wall vessel systems are employed. Furthermore, the implementation of microfluidic pumps enables constant nutrient and gas exchange during cell cultivation and allows the investigation of long-term infection processes. The highest level of cell culture complexity is reached by engineered and explanted tissues which currently pave the way for a more comprehensive view on microbial pathogenicity mechanisms.
Collapse
Affiliation(s)
- Simone Bergmann
- Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| | - Michael Steinert
- Institute of Microbiology, Technische Universität Braunschweig, Braunschweig, Lower Saxony, Germany
| |
Collapse
|
9
|
Minami H, Tashiro K, Okada A, Hirata N, Yamaguchi T, Takayama K, Mizuguchi H, Kawabata K. Generation of Brain Microvascular Endothelial-Like Cells from Human Induced Pluripotent Stem Cells by Co-Culture with C6 Glioma Cells. PLoS One 2015; 10:e0128890. [PMID: 26061227 PMCID: PMC4464886 DOI: 10.1371/journal.pone.0128890] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Accepted: 05/02/2015] [Indexed: 11/30/2022] Open
Abstract
The blood brain barrier (BBB) is formed by brain microvascular endothelial cells (BMECs) and tightly regulates the transport of molecules from blood to neural tissues. In vitro BBB models from human pluripotent stem cell (PSCs)-derived BMECs would be useful not only for the research on the BBB development and function but also for drug-screening for neurological diseases. However, little is known about the differentiation of human PSCs to BMECs. In the present study, human induced PSCs (iPSCs) were differentiated into endothelial cells (ECs), and further maturated to BMECs. Interestingly, C6 rat glioma cell-conditioned medium (C6CM), in addition to C6 co-culture, induced the differentiation of human iPSC-derived ECs (iPS-ECs) to BMEC-like cells, increase in the trans-endothelial electrical resistance, decreased in the dextran transport and up-regulation of gene expression of tight junction molecules in human iPS-ECs. Moreover, Wnt inhibitors attenuated the effects of C6CM. In summary, we have established a simple protocol of the generation of BMEC-like cells from human iPSCs, and have demonstrated that differentiation of iPS-ECs to BMEC-like cells is induced by C6CM-derived signals, including canonical Wnt signals.
Collapse
Affiliation(s)
- Haruka Minami
- Laboratory of Stem Cell Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
- Laboratory of Biomedical Innovation, Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan
| | - Katsuhisa Tashiro
- Laboratory of Stem Cell Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
| | - Atsumasa Okada
- Laboratory of Stem Cell Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
| | - Nobue Hirata
- Laboratory of Stem Cell Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
| | - Tomoko Yamaguchi
- Laboratory of Stem Cell Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
| | - Kazuo Takayama
- Laboratory of Hepatocyte Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan
- iPS Cell-based Research Project on Hepatic Toxicity and Metabolism, Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan
| | - Hiroyuki Mizuguchi
- Laboratory of Hepatocyte Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
- Laboratory of Biochemistry and Molecular Biology, Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan
- iPS Cell-based Research Project on Hepatic Toxicity and Metabolism, Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan
- The Center for Advanced Medical Engineering and Informatics, Osaka University, 1–6, Yamadaoka, Suita, Osaka, 565–0871, Japan
| | - Kenji Kawabata
- Laboratory of Stem Cell Regulation, National Institute of Biomedical Innovation, 7-6-8, Saito-Asagi, Ibaraki, Osaka 567–0085, Japan
- Laboratory of Biomedical Innovation, Graduate School of Pharmaceutical Sciences, Osaka University, 1–6 Yamadaoka, Suita, Osaka 565–0871, Japan
- * E-mail:
| |
Collapse
|
10
|
Shwetank, Date OS, Carbone E, Manjunath R. Inhibition of ERK and proliferation in NK cell lines by soluble HLA-E released from Japanese encephalitis virus infected cells. Immunol Lett 2014; 162:94-100. [PMID: 25086398 DOI: 10.1016/j.imlet.2014.07.010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Revised: 07/18/2014] [Accepted: 07/21/2014] [Indexed: 01/10/2023]
Abstract
Productive infection of human endothelial cells with Japanese encephalitis virus (JEV), a single stranded RNA virus induces shedding of sHLA-E. We show here that sHLA-E that is released upon infection with this flavivirus can inhibit IL-2 and PMA mediated ERK 1/2 phosphorylation in two NK cell lines, Nishi and NKL. Virus infected or IFN-γ treated cell culture supernatants containing sHLA-E were found to partially inhibit IL-2 mediated induction of CD25 molecules on NKL cells. It was also found that sHLA-E could inhibit IL-2 induced [(3)H]-thymidine incorporation suggesting that, similar to cell surface expressed HLA-E, sHLA-E could also inhibit NK cell responses. Hence JEV-induced shedding of sHLA-E needs further investigation to better understand immune responses in JEV infections since it may have a role in viral evasion of NK cell responses.
Collapse
Affiliation(s)
- Shwetank
- Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Onkar Sanjay Date
- Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Ennio Carbone
- Department of Experimental and Clinical Medicine "G Salvatore", University of Catanzaro Magna Graecia, Catanzaro 88100, Italy.
| | | |
Collapse
|
11
|
Kumar G, Date OS, Kim KS, Manjunath R. Infection of human amniotic and endothelial cells by Japanese encephalitis virus: Increased expression of HLA-F. Virology 2014; 471-473:29-37. [PMID: 25461528 DOI: 10.1016/j.virol.2014.09.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2014] [Revised: 09/05/2014] [Accepted: 09/26/2014] [Indexed: 10/24/2022]
Abstract
Productive infection of human amniotic and endothelial cell lines with Japanese encephalitis virus (JEV) was established leading to the induction of NFκB and HLA-F, a non-classical MHC molecule. Induction of the HLA-F gene and protein in JEV-infected cells was shown to be NFκB dependent since it was blocked by inhibitors of NFκB activation. ShRNA targeting lentivirus-mediated stable knockdown of the p65 subunit of NFκB inhibited JEV-mediated induction of HLA-F both in the amniotic cell line, AV-3 as well as the human brain microendothelial cell line, HBMEC. The induction of HLA-F by treatment of AV-3 with TNF-α was also inhibited by ShRNA mediated knockdown of NFκB. TNF-α treatment of HEK293T cells that were transfected with reporter plasmids under the control of HLA-F enhancer A elements resulted in significant transactivation of the luciferase reporter gene. NFκB-mediated induction of HLA-F following JEV infection and TNF-α exposure is being suggested for the first time.
Collapse
Affiliation(s)
- Gaurav Kumar
- Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Onkar Sanjay Date
- Department of Biochemistry, Indian Institute of Science, Bangalore 560012, India.
| | - Kwang Sik Kim
- Department of pediatric infectious diseases, John Hopkins university school of medicine, Baltimore, MD 21287, USA.
| | | |
Collapse
|
12
|
Tryps and trips: cell trafficking across the 100-year-old blood-brain barrier. Trends Neurosci 2014; 37:325-33. [PMID: 24780507 PMCID: PMC4045197 DOI: 10.1016/j.tins.2014.03.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Revised: 03/27/2014] [Accepted: 03/28/2014] [Indexed: 01/03/2023]
Abstract
The blood–brain barrier (BBB) was discovered one century ago by the use of trypan dyes. The discovery initiated the targeted brain delivery of drugs. Trypan dyes were developed to kill African trypanosomes that cause sleeping sickness. Trypanosomes disclose cell trafficking in and out of the BBB. Disturbed gating at the BBB may cause neurodegeneration.
One hundred years ago, Edwin E. Goldmann discovered the blood–brain barrier (BBB) using trypan dyes. These dyes were developed and named by Paul Ehrlich during his search for drugs to kill African trypanosomes (extracellular parasites that cause sleeping sickness) while sparing host cells. For Ehrlich, this was the first strategy based on the ‘chemotherapy’ concept he had introduced. The discovery of the BBB revealed, however, the difficulties in drug delivery to the brain. Mechanisms by which parasites enter, dwell, and exit the brain currently provide novel views on cell trafficking across the BBB. These mechanisms also highlight the role of pericytes and endocytosis regulation in BBB functioning and in disrupted BBB gating, which may be involved in the pathogenesis of neurodegeneration.
Collapse
|
13
|
Shwetank, Date OS, Kim KS, Manjunath R. Infection of human endothelial cells by Japanese encephalitis virus: increased expression and release of soluble HLA-E. PLoS One 2013; 8:e79197. [PMID: 24236107 PMCID: PMC3827286 DOI: 10.1371/journal.pone.0079197] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2012] [Accepted: 09/19/2013] [Indexed: 11/19/2022] Open
Abstract
Japanese encephalitis virus (JEV) is a single stranded RNA virus that infects the central nervous system leading to acute encephalitis in children. Alterations in brain endothelial cells have been shown to precede the entry of this flavivirus into the brain, but infection of endothelial cells by JEV and their consequences are still unclear. Productive JEV infection was established in human endothelial cells leading to IFN-β and TNF-α production. The MHC genes for HLA-A, -B, -C and HLA-E antigens were upregulated in human brain microvascular endothelial cells, the endothelial-like cell line, ECV 304 and human foreskin fibroblasts upon JEV infection. We also report the release/shedding of soluble HLA-E (sHLA-E) from JEV infected human endothelial cells for the first time. This shedding of sHLA-E was blocked by an inhibitor of matrix metalloproteinases (MMP). In addition, MMP-9, a known mediator of HLA solubilisation was upregulated by JEV. In contrast, human fibroblasts showed only upregulation of cell-surface HLA-E. Addition of UV inactivated JEV-infected cell culture supernatants stimulated shedding of sHLA-E from uninfected ECV cells indicating a role for soluble factors/cytokines in the shedding process. Antibody mediated neutralization of TNF-α as well as IFNAR receptor together not only resulted in inhibition of sHLA-E shedding from uninfected cells, it also inhibited HLA-E and MMP-9 gene expression in JEV-infected cells. Shedding of sHLA-E was also observed with purified TNF-α and IFN-β as well as the dsRNA analog, poly (I:C). Both IFN-β and TNF-α further potentiated the shedding when added together. The role of soluble MHC antigens in JEV infection is hitherto unknown and therefore needs further investigation.
Collapse
Affiliation(s)
- Shwetank
- Department of Biochemistry, Indian Institute of Science, Bangalore, Karnataka, India
| | - Onkar S. Date
- Department of Biochemistry, Indian Institute of Science, Bangalore, Karnataka, India
| | - Kwang S. Kim
- Department of Pediatric Infectious Diseases, John Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | | |
Collapse
|
14
|
Frevert U, Movila A, Nikolskaia OV, Raper J, Mackey ZB, Abdulla M, McKerrow J, Grab DJ. Early invasion of brain parenchyma by African trypanosomes. PLoS One 2012; 7:e43913. [PMID: 22952808 PMCID: PMC3432051 DOI: 10.1371/journal.pone.0043913] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2012] [Accepted: 07/26/2012] [Indexed: 12/11/2022] Open
Abstract
Human African trypanosomiasis or sleeping sickness is a vector-borne parasitic disease that has a major impact on human health and welfare in sub-Saharan countries. Based mostly on data from animal models, it is currently thought that trypanosome entry into the brain occurs by initial infection of the choroid plexus and the circumventricular organs followed days to weeks later by entry into the brain parenchyma. However, Trypanosoma brucei bloodstream forms rapidly cross human brain microvascular endothelial cells in vitro and appear to be able to enter the murine brain without inflicting cerebral injury. Using a murine model and intravital brain imaging, we show that bloodstream forms of T. b. brucei and T. b. rhodesiense enter the brain parenchyma within hours, before a significant level of microvascular inflammation is detectable. Extravascular bloodstream forms were viable as indicated by motility and cell division, and remained detectable for at least 3 days post infection suggesting the potential for parasite survival in the brain parenchyma. Vascular inflammation, as reflected by leukocyte recruitment and emigration from cortical microvessels, became apparent only with increasing parasitemia at later stages of the infection, but was not associated with neurological signs. Extravascular trypanosomes were predominantly associated with postcapillary venules suggesting that early brain infection occurs by parasite passage across the neuroimmunological blood brain barrier. Thus, trypanosomes can invade the murine brain parenchyma during the early stages of the disease before meningoencephalitis is fully established. Whether individual trypanosomes can act alone or require the interaction from a quorum of parasites remains to be shown. The significance of these findings for disease development is now testable.
Collapse
Affiliation(s)
- Ute Frevert
- Division of Medical Parasitology, Department of Microbiology, New York University School of Medicine, New York, New York, United States of America
| | - Alexandru Movila
- Division of Medical Parasitology, Department of Microbiology, New York University School of Medicine, New York, New York, United States of America
| | - Olga V. Nikolskaia
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| | - Jayne Raper
- Department of Biological Sciences, Hunter College of CUNY, New York, New York, United States of America
| | - Zachary B. Mackey
- Department of Pathology, University of California San Francisco, San Francisco, California, United States of America
| | - Maha Abdulla
- Department of Pathology, University of California San Francisco, San Francisco, California, United States of America
| | - James McKerrow
- Department of Pathology, University of California San Francisco, San Francisco, California, United States of America
| | - Dennis J. Grab
- Department of Pathology, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
- Department of Pediatrics, The Johns Hopkins University School of Medicine, Baltimore, Maryland, United States of America
| |
Collapse
|