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Pang B, Wu L, Peng Y. In vitro modelling of the neurovascular unit for ischemic stroke research: Emphasis on human cell applications and 3D model design. Exp Neurol 2024; 381:114942. [PMID: 39222766 DOI: 10.1016/j.expneurol.2024.114942] [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: 03/15/2024] [Revised: 07/16/2024] [Accepted: 08/29/2024] [Indexed: 09/04/2024]
Abstract
Ischemic stroke has garnered global medical attention as one of the most serious cerebrovascular diseases. The mechanisms involved in both the development and recovery phases of ischemic stroke are complex, involving intricate interactions among different types of cells, each with its own unique functions. To better understand the possible pathogenesis, neurovascular unit (NVU), a concept comprising neurons, endothelial cells, mural cells, glial cells, and extracellular matrix components, has been used in analysing various brain diseases, particularly in ischemic stroke, aiming to depict the interactions between cerebral vasculature and neural cells. While in vivo models often face limitations in terms of reproducibility and the ability to precisely mimic human pathophysiology, it is now important to establish in vitro NVU models for ischemic stroke research. In order to accurately portray the pathological processes occurring within the brain, a diverse array of NVU 2D and 3D in vitro models, each possessing unique characteristics and advantages, have been meticulously developed. This review presents a comprehensive overview of recent advancements in in vitro models specifically tailored for investigating ischemic stroke. Through a systematic categorization of these developments, we elucidate the intricate links between NVU components and the pathogenesis of ischemic stroke. Furthermore, we explore the distinct advantages offered by innovative NVU models, notably 3D models, which closely emulate in vivo conditions. Additionally, an examination of current therapeutic modalities for ischemic stroke developed utilizing in vitro NVU models is provided. Serving as a valuable reference, this review aids in the design and implementation of effective in vitro models for ischemic stroke research.
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Affiliation(s)
- Bo Pang
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Lei Wu
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China
| | - Ying Peng
- State Key Laboratory of Bioactive Substances and Functions of Natural Medicines, Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing 100050, China.
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2
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Lu S, Zhao Q, Guan Y, Sun Z, Li W, Guo S, Zhang A. The communication mechanism of the gut-brain axis and its effect on central nervous system diseases: A systematic review. Biomed Pharmacother 2024; 178:117207. [PMID: 39067168 DOI: 10.1016/j.biopha.2024.117207] [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: 05/13/2024] [Revised: 07/15/2024] [Accepted: 07/23/2024] [Indexed: 07/30/2024] Open
Abstract
Gut microbiota is involved in intricate and active metabolic processes the host's brain function, especially its role in immune responses, secondary metabolism, and symbiotic connections with the host. Gut microbiota can promote the production of essential metabolites, neurotransmitters, and other neuroactive chemicals that affect the development and treatment of central nervous system diseases. This article introduces the relevant pathways and manners of the communication between the brain and gut, summarizes a comprehensive overview of the current research status of key gut microbiota metabolites that affect the functions of the nervous system, revealing those adverse factors that affect typical communication between the brain-gut axis, and outlining the efforts made by researchers to alleviate these neurological diseases through targeted microbial interventions. The relevant pathways and manners of communication between the brain and gut contribute to the experimental design of new treatment plans and drug development. The factors that may cause changes in gut microbiota and affect metabolites, as well as current intervention methods are summarized, which helps improve gut microbiota brain dialogue, prevent adverse triggering factors from interfering with the gut microbiota system, and minimize neuropathological changes.
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Affiliation(s)
- Shengwen Lu
- Department of Pharmaceutical Analysis, GAP Center, Heilongjiang University of Chinese Medicine, Heping Road 24, Harbin 150040, China
| | - Qiqi Zhao
- Department of Pharmaceutical Analysis, GAP Center, Heilongjiang University of Chinese Medicine, Heping Road 24, Harbin 150040, China
| | - Yu Guan
- Department of Pharmaceutical Analysis, GAP Center, Heilongjiang University of Chinese Medicine, Heping Road 24, Harbin 150040, China
| | - Zhiwen Sun
- Department of Gastroenterology, The First Affiliated Hospital of Heilongjiang University of Chinese Medicine, Heping Road 24, Harbin 150040, China
| | - Wenhao Li
- School of Basic Medical Science of Heilongjiang University of Chinese Medicine, Heping Road 24, Harbin 150040, China
| | - Sifan Guo
- International Advanced Functional Omics Platform, Scientific Experiment Center, Hainan Medical University, Xueyuan Road 3, Haikou 571199, China
| | - Aihua Zhang
- International Advanced Functional Omics Platform, Scientific Experiment Center, Hainan Medical University, Xueyuan Road 3, Haikou 571199, China; Graduate School, Heilongjiang University of Chinese Medicine, Harbin 150040, China; INTI International University, Nilai 71800, Malaysia.
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3
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Deli MA, Porkoláb G, Kincses A, Mészáros M, Szecskó A, Kocsis AE, Vigh JP, Valkai S, Veszelka S, Walter FR, Dér A. Lab-on-a-chip models of the blood-brain barrier: evolution, problems, perspectives. LAB ON A CHIP 2024; 24:1030-1063. [PMID: 38353254 DOI: 10.1039/d3lc00996c] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/28/2024]
Abstract
A great progress has been made in the development and use of lab-on-a-chip devices to model and study the blood-brain barrier (BBB) in the last decade. We present the main types of BBB-on-chip models and their use for the investigation of BBB physiology, drug and nanoparticle transport, toxicology and pathology. The selection of the appropriate cell types to be integrated into BBB-on-chip devices is discussed, as this greatly impacts the physiological relevance and translatability of findings. We identify knowledge gaps, neglected engineering and cell biological aspects and point out problems and contradictions in the literature of BBB-on-chip models, and suggest areas for further studies to progress this highly interdisciplinary field. BBB-on-chip models have an exceptional potential as predictive tools and alternatives of animal experiments in basic and preclinical research. To exploit the full potential of this technique expertise from materials science, bioengineering as well as stem cell and vascular/BBB biology is necessary. There is a need for better integration of these diverse disciplines that can only be achieved by setting clear parameters for characterizing both the chip and the BBB model parts technically and functionally.
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Affiliation(s)
- Mária A Deli
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - Gergő Porkoláb
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
- Doctoral School of Biology, University of Szeged, Hungary
| | - András Kincses
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - Mária Mészáros
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - Anikó Szecskó
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
- Doctoral School of Biology, University of Szeged, Hungary
| | - Anna E Kocsis
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - Judit P Vigh
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
- Doctoral School of Biology, University of Szeged, Hungary
| | - Sándor Valkai
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - Szilvia Veszelka
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - Fruzsina R Walter
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
| | - András Dér
- HUN-REN Biological Research Centre, Institute of Biophysics, Szeged, Hungary.
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4
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Balestri W, Sharma R, da Silva VA, Bobotis BC, Curle AJ, Kothakota V, Kalantarnia F, Hangad MV, Hoorfar M, Jones JL, Tremblay MÈ, El-Jawhari JJ, Willerth SM, Reinwald Y. Modeling the neuroimmune system in Alzheimer's and Parkinson's diseases. J Neuroinflammation 2024; 21:32. [PMID: 38263227 PMCID: PMC10807115 DOI: 10.1186/s12974-024-03024-8] [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: 10/26/2023] [Accepted: 01/16/2024] [Indexed: 01/25/2024] Open
Abstract
Parkinson's disease (PD) and Alzheimer's disease (AD) are neurodegenerative disorders caused by the interaction of genetic, environmental, and familial factors. These diseases have distinct pathologies and symptoms that are linked to specific cell populations in the brain. Notably, the immune system has been implicated in both diseases, with a particular focus on the dysfunction of microglia, the brain's resident immune cells, contributing to neuronal loss and exacerbating symptoms. Researchers use models of the neuroimmune system to gain a deeper understanding of the physiological and biological aspects of these neurodegenerative diseases and how they progress. Several in vitro and in vivo models, including 2D cultures and animal models, have been utilized. Recently, advancements have been made in optimizing these existing models and developing 3D models and organ-on-a-chip systems, holding tremendous promise in accurately mimicking the intricate intracellular environment. As a result, these models represent a crucial breakthrough in the transformation of current treatments for PD and AD by offering potential for conducting long-term disease-based modeling for therapeutic testing, reducing reliance on animal models, and significantly improving cell viability compared to conventional 2D models. The application of 3D and organ-on-a-chip models in neurodegenerative disease research marks a prosperous step forward, providing a more realistic representation of the complex interactions within the neuroimmune system. Ultimately, these refined models of the neuroimmune system aim to aid in the quest to combat and mitigate the impact of debilitating neuroimmune diseases on patients and their families.
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Affiliation(s)
- Wendy Balestri
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, UK
- Medical Technologies Innovation Facility, Nottingham Trent University, Nottingham, UK
| | - Ruchi Sharma
- Department of Mechanical Engineering, University of Victoria, Victoria, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
| | - Victor A da Silva
- Department of Mechanical Engineering, University of Victoria, Victoria, Canada
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
| | - Bianca C Bobotis
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
| | - Annabel J Curle
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Vandana Kothakota
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, UK
| | | | - Maria V Hangad
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
- Department of Chemistry, University of Victoria, Victoria, BC, Canada
| | - Mina Hoorfar
- Department of Mechanical Engineering, University of Victoria, Victoria, Canada
| | - Joanne L Jones
- Department of Clinical Neurosciences, University of Cambridge, Cambridge, UK
| | - Marie-Ève Tremblay
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada
- Neurosciences Axis, Centre de Recherche du CHU de Québec, Université Laval, Québec City, QC, Canada
- Department of Molecular Medicine, Université Laval, Québec City, QC, Canada
- Department of Biochemistry and Molecular Biology, The University of British Columbia, Vancouver, BC, Canada
- Department of Neurology and Neurosurgery, McGill University, Montréal, QC, Canada
- Institute On Aging and Lifelong Health, University of Victoria, Victoria, BC, Canada
| | - Jehan J El-Jawhari
- Department of Biosciences, School of Science and Technology, Nottingham Trent University, Nottingham, UK
- Department of Clinical Pathology, Faculty of Medicine, Mansoura University, Mansoura, Egypt
| | - Stephanie M Willerth
- Department of Mechanical Engineering, University of Victoria, Victoria, Canada.
- Division of Medical Sciences, University of Victoria, Victoria, BC, Canada.
- Centre for Advanced Materials and Related Technology (CAMTEC), University of Victoria, Victoria, BC, Canada.
- School of Biomedical Engineering, University of British Columbia, Vancouver, BC, Canada.
| | - Yvonne Reinwald
- Department of Engineering, School of Science and Technology, Nottingham Trent University, Nottingham, UK.
- Medical Technologies Innovation Facility, Nottingham Trent University, Nottingham, UK.
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Wang S, Bai L, Hu X, Yao S, Hao Z, Zhou J, Li X, Lu H, He J, Wang L, Li D. 3D Bioprinting of Neurovascular Tissue Modeling with Collagen-Based Low-Viscosity Composites. Adv Healthc Mater 2023; 12:e2300004. [PMID: 37264745 PMCID: PMC11469067 DOI: 10.1002/adhm.202300004] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Revised: 05/27/2023] [Indexed: 06/03/2023]
Abstract
In vitro neurovascular unit (NVU) models are valuable for investigating brain functions and developing drugs. However, it remains challenging to recapitulate the native architectural features and ultra-soft extracellular matrix (ECM) properties of the natural NVU. Cell-laden bioprinting is promising to prepare complex living tissues, but hard to balance the fidelity and cell growth. This study proposes a novel two-stage methodology for biomanufacturing functional 3D neurovascular constructs in vitro with low modulus of ECM. At the shaping stage, a low-viscosity alginate/collagen is printed through an embedded approach; at the culturing stage, the alginate is removed through targeted lysing. The low-viscosity and rapid crosslinking properties provide a printing resolution of ≈10 µm, and the lysis processing can decrease the hydrogels' modulus to ≈1 kPa and adjust the porosity of the microstructure, providing cells with an environment closing to the brain ECM. A 3D hollow coaxial neurovascular model is fabricated, in which the endothelial cells has expressed tight junction proteins and shown selective permeability, and the astrocytes outside of the endothelial layer are found to spread out with branches and directly interact with endothelial cells. The present study offers a promising modeling method for better understanding the NVU function and screening neuro-drugs.
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Affiliation(s)
- Sen Wang
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Luge Bai
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Xiaoxuan Hu
- Institute of NeurobiologySchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterXi'an710061China
- Key Laboratory of Ministry of Education for Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterXi'an710061China
| | - Siqi Yao
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Zhiyan Hao
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - JiaJia Zhou
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Xiao Li
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Haixia Lu
- Institute of NeurobiologySchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterXi'an710061China
- Key Laboratory of Ministry of Education for Environment and Genes Related to DiseasesXi'an Jiaotong University Health Science CenterXi'an710061China
- Department of Human Anatomy & HistoembryologySchool of Basic Medical SciencesXi'an Jiaotong University Health Science CenterXi'an710061China
| | - Jiankang He
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Ling Wang
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
| | - Dichen Li
- State Key Laboratory for Manufacturing System EngineeringXi'an Jiaotong UniversityXi'an710054China
- School of Mechanical EngineeringXi'an Jiaotong UniversityXi'an710054China
- NMPA Key Laboratory for Research and Evaluation of Additive Manufacturing Medical DevicesXi'an710054China
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6
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Brandl S, Reindl M. Blood-Brain Barrier Breakdown in Neuroinflammation: Current In Vitro Models. Int J Mol Sci 2023; 24:12699. [PMID: 37628879 PMCID: PMC10454051 DOI: 10.3390/ijms241612699] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2023] [Revised: 08/07/2023] [Accepted: 08/08/2023] [Indexed: 08/27/2023] Open
Abstract
The blood-brain barrier, which is formed by tightly interconnected microvascular endothelial cells, separates the brain from the peripheral circulation. Together with other central nervous system-resident cell types, including pericytes and astrocytes, the blood-brain barrier forms the neurovascular unit. Upon neuroinflammation, this barrier becomes leaky, allowing molecules and cells to enter the brain and to potentially harm the tissue of the central nervous system. Despite the significance of animal models in research, they may not always adequately reflect human pathophysiology. Therefore, human models are needed. This review will provide an overview of the blood-brain barrier in terms of both health and disease. It will describe all key elements of the in vitro models and will explore how different compositions can be utilized to effectively model a variety of neuroinflammatory conditions. Furthermore, it will explore the existing types of models that are used in basic research to study the respective pathologies thus far.
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Affiliation(s)
| | - Markus Reindl
- Clinical Department of Neurology, Medical University of Innsbruck, 6020 Innsbruck, Austria;
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Pérez-López A, Isabel Torres-Suárez A, Martín-Sabroso C, Aparicio-Blanco J. An overview of in vitro 3D models of the blood-brain barrier as a tool to predict the in vivo permeability of nanomedicines. Adv Drug Deliv Rev 2023; 196:114816. [PMID: 37003488 DOI: 10.1016/j.addr.2023.114816] [Citation(s) in RCA: 25] [Impact Index Per Article: 25.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2023] [Revised: 03/21/2023] [Accepted: 03/27/2023] [Indexed: 04/03/2023]
Abstract
The blood-brain barrier (BBB) prevents efficient drug delivery to the central nervous system. As a result, brain diseases remain one of the greatest unmet medical needs. Understanding the tridimensional structure of the BBB helps gain insight into the pathology of the BBB and contributes to the development of novel therapies for brain diseases. Therefore, 3D models with an ever-growing sophisticated complexity are being developed to closely mimic the human neurovascular unit. Among these 3D models, hydrogel-, spheroid- and organoid-based static BBB models have been developed, and so have microfluidic-based BBB-on-a-chip models. The different 3D preclinical models of the BBB, both in health and disease, are here reviewed, from their development to their application for permeability testing of nanomedicines across the BBB, discussing the advantages and disadvantages of each model. The validation with data from in vivo preclinical data is also discussed in those cases where provided.
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Affiliation(s)
- Alexandre Pérez-López
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain
| | - Ana Isabel Torres-Suárez
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain; Institute of Industrial Pharmacy, Complutense University of Madrid, Madrid, Spain.
| | - Cristina Martín-Sabroso
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain; Institute of Industrial Pharmacy, Complutense University of Madrid, Madrid, Spain
| | - Juan Aparicio-Blanco
- Department of Pharmaceutics and Food Technology, Faculty of Pharmacy, Complutense University of Madrid, Madrid, Spain; Institute of Industrial Pharmacy, Complutense University of Madrid, Madrid, Spain.
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8
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Spitz S, Ko E, Ertl P, Kamm RD. How Organ-on-a-Chip Technology Can Assist in Studying the Role of the Glymphatic System in Neurodegenerative Diseases. Int J Mol Sci 2023; 24:2171. [PMID: 36768495 PMCID: PMC9916687 DOI: 10.3390/ijms24032171] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/17/2023] [Accepted: 01/18/2023] [Indexed: 01/25/2023] Open
Abstract
The lack of a conventional lymphatic system that permeates throughout the entire human brain has encouraged the identification and study of alternative clearance routes within the cerebrum. In 2012, the concept of the glymphatic system, a perivascular network that fluidically connects the cerebrospinal fluid to the lymphatic vessels within the meninges via the interstitium, emerged. Although its exact mode of action has not yet been fully characterized, the key underlying processes that govern solute transport and waste clearance have been identified. This review briefly describes the perivascular glial-dependent clearance system and elucidates its fundamental role in neurodegenerative diseases. The current knowledge of the glymphatic system is based almost exclusively on animal-based measurements, but these face certain limitations inherent to in vivo experiments. Recent advances in organ-on-a-chip technology are discussed to demonstrate the technology's ability to provide alternative human-based in vitro research models. Herein, the specific focus is on how current microfluidic-based in vitro models of the neurovascular system and neurodegenerative diseases might be employed to (i) gain a deeper understanding of the role and function of the glymphatic system and (ii) to identify new opportunities for pharmacological intervention.
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Affiliation(s)
- Sarah Spitz
- Faculty of Technical Chemistry, Vienna University of Technology, Getreidemarkt 9/163-164, 1060 Vienna, Austria
- Department of Mechanical Engineering and Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Eunkyung Ko
- Department of Mechanical Engineering and Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
| | - Peter Ertl
- Faculty of Technical Chemistry, Vienna University of Technology, Getreidemarkt 9/163-164, 1060 Vienna, Austria
| | - Roger D. Kamm
- Department of Mechanical Engineering and Biological Engineering, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
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9
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Fan Y, Lv X, Chen Z, Peng Y, Zhang M. m6A methylation: Critical roles in aging and neurological diseases. Front Mol Neurosci 2023; 16:1102147. [PMID: 36896007 PMCID: PMC9990872 DOI: 10.3389/fnmol.2023.1102147] [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: 11/29/2022] [Accepted: 02/02/2023] [Indexed: 02/23/2023] Open
Abstract
N6-methyladenosine (m6A) is the most abundant internal RNA modification in eukaryotic cells, which participates in the functional regulation of various biological processes. It regulates the expression of targeted genes by affecting RNA translocation, alternative splicing, maturation, stability, and degradation. As recent evidence shows, of all organs, brain has the highest abundance of m6A methylation of RNAs, which indicates its regulating role in central nervous system (CNS) development and the remodeling of the cerebrovascular system. Recent studies have shown that altered m6A levels are crucial in the aging process and the onset and progression of age-related diseases. Considering that the incidence of cerebrovascular and degenerative neurologic diseases increase with aging, the importance of m6A in neurological manifestations cannot be ignored. In this manuscript, we focus on the role of m6A methylation in aging and neurological manifestations, hoping to provide a new direction for the molecular mechanism and novel therapeutic targets.
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Affiliation(s)
- Yishu Fan
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Xinyi Lv
- Hunan Key Laboratory of Medical Epigenomics, Department of Dermatology, The Second Xiangya Hospital of Central South University, Changsha, China
| | - Zhuohui Chen
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Yanyi Peng
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
| | - Mengqi Zhang
- Department of Neurology, Xiangya Hospital, Central South University, Changsha, China.,National Clinical Research Center for Geriatric Disorders, Xiangya Hospital, Central South University, Changsha, Hunan, China
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10
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Jang M, Choi N, Kim HN. Hyperglycemic Neurovasculature-On-A-Chip to Study the Effect of SIRT1-Targeted Therapy for the Type 3 Diabetes "Alzheimer's Disease". ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2022; 9:e2201882. [PMID: 36073820 PMCID: PMC9731710 DOI: 10.1002/advs.202201882] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 06/28/2022] [Indexed: 05/22/2023]
Abstract
Diabetes mellitus (DM) is closely related to Alzheimer's disease (AD), but individual cellular changes and the possibilities of recovery through molecular level regulation have not been investigated. Here, a neurovasculature-on-a-chip (NV chip) model is presented in which the perfusable brain microvasculature is surrounded by the neurons. Under hyperglycemic conditions, the brain microvasculature shows disruption of barrier function and reduced expression of junctional markers. The neurons show Tau pathology and amyloid-beta (Aß) accumulation. Endothelial cells and neurons in the NV chip show sirtuin 1 (SIRT1) downregulation under hyperglycemic conditions, suggesting SIRT1 as a key regulator of hyperglycemia-induced AD. The recovery of glucose levels rescue SIRT1 expression, suggesting that this type of intervention may rescue the progression of hyperglycemia-mediated AD. Furthermore, the short hairpin RNA (shRNA)-, clustered regularly interspaced short palindromic repeats (CRISPR)-, and pharmaceutics-mediated regulation of SIRT1 regulate the pathophysiology of the brain endothelium and neurons at the functional and molecular levels.
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Affiliation(s)
- Minjeong Jang
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Nakwon Choi
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science & TechnologyKIST SchoolRepublic of KoreaUniversity of Science and TechnologySeoul02792Republic of Korea
- KU‐KIST Graduate School of Converging Science and TechnologyKorea UniversitySeoul02841Republic of Korea
| | - Hong Nam Kim
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science & TechnologyKIST SchoolRepublic of KoreaUniversity of Science and TechnologySeoul02792Republic of Korea
- School of Mechanical EngineeringYonsei UniversitySeoul03722Republic of Korea
- Yonsei‐KIST Convergence Research InstituteYonsei UniversitySeoul03722Republic of Korea
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Development of Tumor-Vasculature Interaction on Chip Mimicking Vessel Co-Option of Glioblastoma. BIOCHIP JOURNAL 2022. [DOI: 10.1007/s13206-022-00090-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Kim D, Hwang KS, Seo EU, Seo S, Lee BC, Choi N, Choi J, Kim HN. Vascularized Lung Cancer Model for Evaluating the Promoted Transport of Anticancer Drugs and Immune Cells in an Engineered Tumor Microenvironment. Adv Healthc Mater 2022; 11:e2102581. [PMID: 35286780 PMCID: PMC11468795 DOI: 10.1002/adhm.202102581] [Citation(s) in RCA: 26] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2021] [Revised: 02/08/2022] [Indexed: 01/09/2023]
Abstract
The tumor microenvironment (TME) is the environment around the tumor, including blood vessels, immune cells, fibroblasts, signaling molecules, and the extracellular matrix (ECM). Owing to its component interactions, the TME influences tumor growth and drug delivery in a highly complex manner. Although several vascularized cancer models are developed to mimic the TME in vitro, these models cannot comprehensively reflect blood vessel-tumor spheroid interactions. Here, a method for inducing controlled tumor angiogenesis by engineering the microenvironment is presented. The interstitial flow direction regulates the direction of capillary sprouting, showing that angiogenesis occurs in the opposite direction of flow, while the existence of lung fibroblasts affects the continuity and lumen formation of sprouted capillaries. The vascularized tumor model shows enhanced delivery of anticancer drugs and immune cells to the tumor spheroids because of the perfusable vascular networks. The possibility of capillary embolism using anticancer drug-conjugated liquid metal nanoparticles is investigated using the vascularized tumor model. This vascularized tumor platform can aid in the development of effective anticancer drugs and cancer immunotherapy.
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Affiliation(s)
- Dasom Kim
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
| | - Kyeong Seob Hwang
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- School of Mechanical EngineeringYonsei UniversitySeoul03722Republic of Korea
| | - Eun U Seo
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science and TechnologyKIST SchoolKorea University of Science and Technology (UST)Seoul02792Republic of Korea
| | - Suyeong Seo
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Program in Nano Science and TechnologyGraduate School of Convergence Science and TechnologySeoul National UniversitySeoul08826Republic of Korea
| | - Byung Chul Lee
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science and TechnologyKIST SchoolKorea University of Science and Technology (UST)Seoul02792Republic of Korea
| | - Nakwon Choi
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- Division of Bio‐Medical Science and TechnologyKIST SchoolKorea University of Science and Technology (UST)Seoul02792Republic of Korea
- KU‐KIST Graduate School of Converging Science and TechnologyKorea UniversitySeoul02841Republic of Korea
| | - Jonghoon Choi
- School of Integrative EngineeringChung‐Ang UniversitySeoul06974Republic of Korea
| | - Hong Nam Kim
- Brain Science InstituteKorea Institute of Science and Technology (KIST)Seoul02792Republic of Korea
- School of Mechanical EngineeringYonsei UniversitySeoul03722Republic of Korea
- Division of Bio‐Medical Science and TechnologyKIST SchoolKorea University of Science and Technology (UST)Seoul02792Republic of Korea
- Yonsei‐KIST Convergence Research InstituteYonsei UniversitySeoul03722Republic of Korea
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13
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Ozgun A, Lomboni D, Arnott H, Staines WA, Woulfe J, Variola F. Biomaterial-based strategies for in vitro neural models. Biomater Sci 2022; 10:1134-1165. [PMID: 35023513 DOI: 10.1039/d1bm01361k] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
In vitro models have been used as a complementary tool to animal studies in understanding the nervous system's physiological mechanisms and pathological disorders, while also serving as platforms to evaluate the safety and efficiency of therapeutic candidates. Following recent advances in materials science, micro- and nanofabrication techniques and cell culture systems, in vitro technologies have been rapidly gaining the potential to bridge the gap between animal and clinical studies by providing more sophisticated models that recapitulate key aspects of the structure, biochemistry, biomechanics, and functions of human tissues. This was made possible, in large part, by the development of biomaterials that provide cells with physicochemical features that closely mimic the cellular microenvironment of native tissues. Due to the well-known material-driven cellular response and the importance of mimicking the environment of the target tissue, the selection of optimal biomaterials represents an important early step in the design of biomimetic systems to investigate brain structures and functions. This review provides a comprehensive compendium of commonly used biomaterials as well as the different fabrication techniques employed for the design of neural tissue models. Furthermore, the authors discuss the main parameters that need to be considered to develop functional platforms not only for the study of brain physiological functions and pathological processes but also for drug discovery/development and the optimization of biomaterials for neural tissue engineering.
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Affiliation(s)
- Alp Ozgun
- Department of Mechanical Engineering, Faculty of Engineering, University of Ottawa, Ottawa, Canada. .,Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - David Lomboni
- Department of Mechanical Engineering, Faculty of Engineering, University of Ottawa, Ottawa, Canada. .,Ottawa-Carleton Institute for Biomedical Engineering (OCIBME), Ottawa, Canada
| | - Hallie Arnott
- Department of Mechanical Engineering, Faculty of Engineering, University of Ottawa, Ottawa, Canada. .,Ottawa-Carleton Institute for Biomedical Engineering (OCIBME), Ottawa, Canada
| | - William A Staines
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada
| | - John Woulfe
- Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada.,The Ottawa Hospital, Ottawa, Canada
| | - Fabio Variola
- Department of Mechanical Engineering, Faculty of Engineering, University of Ottawa, Ottawa, Canada. .,Department of Cellular and Molecular Medicine, Faculty of Medicine, University of Ottawa, Ottawa, Canada.,Ottawa-Carleton Institute for Biomedical Engineering (OCIBME), Ottawa, Canada.,The Ottawa Hospital, Ottawa, Canada.,Children's Hospital of Eastern Ontario (CHEO), Ottawa, Canada
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14
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Fan YY, Huo J. A1/A2 astrocytes in central nervous system injuries and diseases: Angels or devils? Neurochem Int 2021; 148:105080. [PMID: 34048845 DOI: 10.1016/j.neuint.2021.105080] [Citation(s) in RCA: 89] [Impact Index Per Article: 29.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/07/2021] [Accepted: 05/22/2021] [Indexed: 02/07/2023]
Abstract
Astrocytes play a pivotal role in maintaining the central nervous system (CNS) homeostasis and function. In response to CNS injuries and diseases, reactive astrocytes are triggered. By purifying and genetically profiling reactive astrocytes, it has been now found that astrocytes can be activated into two polarization states: the neurotoxic or pro-inflammatory phenotype (A1) and the neuroprotective or anti-inflammatory phenotype (A2). Although the simple dichotomy of the A1/A2 phenotypes does not reflect the wide range of astrocytic phenotypes, it facilitates our understanding of the reactive state of astrocytes in various CNS disorders. This article reviews the recent evidences regarding A1/A2 astrocytes, including (a) the specific markers and morphological characteristics, (b) the effects of A1/A2 astrocytes on the neurovascular unit, and (c) the molecular mechanisms involved in the phenotypic switch of astrocytes. Although many questions remain, a deeper understanding of different phenotypic astrocytes will eventually help us to explore effective strategies for neurological disorders by targeting astrocytes.
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Affiliation(s)
- Yan-Ying Fan
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China; Key Laboratory of Cellular Physiology, Ministry of Education, Shanxi Medical University, Taiyuan, 030001, China.
| | - Jing Huo
- Department of Pharmacology, Basic Medical Sciences Center, Shanxi Medical University, Taiyuan, 030001, China; Shanxi Provincial People's Hospital, Shanxi Medical University, Taiyuan, 030001, China
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