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McCloskey MC, Kasap P, Trempel M, Widom LP, Kuebel J, Chen K, Gaborski TR, Engelhardt B, McGrath JL. Use of the MicroSiM (µSiM) Barrier Tissue Platform for Modeling the Blood-Brain Barrier. J Vis Exp 2024:10.3791/65258. [PMID: 38284519 PMCID: PMC11293877 DOI: 10.3791/65258] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2024] Open
Abstract
The microSiM (µSiM) is a membrane-based culture platform for modeling the blood-brain barrier (BBB). Unlike conventional membrane-based platforms, the µSiM provides experimentalists with new capabilities, including live cell imaging, unhindered paracrine signaling between 'blood' and 'brain' chambers, and the ability to directly image immunofluorescence without the need for the extraction/remounting of membranes. Here we demonstrate the basic use of the platform to establish monoculture (endothelial cells) and co-culture (endothelial cells and pericytes) models of the BBB using ultrathin nanoporous silicon-nitride membranes. We demonstrate compatibility with both primary cell cultures and human induced pluripotent stem cell (hiPSC) cultures. We provide methods for qualitative analysis of BBB models via immunofluorescence staining and demonstrate the use of the µSiM for the quantitative assessment of barrier function in a small molecule permeability assay. The methods provided should enable users to establish their barrier models on the platform, advancing the use of tissue chip technology for studying human tissues.
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Affiliation(s)
| | - Pelin Kasap
- Theodor Kocher Institute, University of Bern
| | | | - Louis P Widom
- Department of Biomedical Engineering, Rochester Institute of Technology
| | - Julia Kuebel
- Department of Biomedical Engineering, University of Rochester
| | - Kaihua Chen
- Department of Biomedical Engineering, University of Rochester
| | - Thomas R Gaborski
- Department of Biomedical Engineering, Rochester Institute of Technology
| | | | - James L McGrath
- Department of Biomedical Engineering, University of Rochester;
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Markovich Z, Abreu A, Sheng Y, Han SM, Xiao R. Deciphering internal and external factors influencing intestinal junctional complexes. Gut Microbes 2024; 16:2389320. [PMID: 39150987 PMCID: PMC11332634 DOI: 10.1080/19490976.2024.2389320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2024] [Revised: 07/29/2024] [Accepted: 08/01/2024] [Indexed: 08/18/2024] Open
Abstract
The intestinal barrier, an indispensable guardian of gastrointestinal health, mediates the intricate exchange between internal and external environments. Anchored by evolutionarily conserved junctional complexes, this barrier meticulously regulates paracellular permeability in essentially all living organisms. Disruptions in intestinal junctional complexes, prevalent in inflammatory bowel diseases and irritable bowel syndrome, compromise barrier integrity and often lead to the notorious "leaky gut" syndrome. Critical to the maintenance of the intestinal barrier is a finely orchestrated network of intrinsic and extrinsic factors that modulate the expression, composition, and functionality of junctional complexes. This review navigates through the composition of key junctional complex components and the common methods used to assess intestinal permeability. It also explores the critical intracellular signaling pathways that modulate these junctional components. Lastly, we delve into the complex dynamics between the junctional complexes, microbial communities, and environmental chemicals in shaping the intestinal barrier function. Comprehending this intricate interplay holds paramount importance in unraveling the pathophysiology of gastrointestinal disorders. Furthermore, it lays the foundation for the development of precise therapeutic interventions targeting barrier dysfunction.
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Affiliation(s)
- Zachary Markovich
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, USA
- Graduate Program in Biomedical Sciences, College of Medicine, University of Florida, Gainesville, FL, USA
- Center for Smell and Taste, University of Florida, Gainesville, FL, USA
| | - Adriana Abreu
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Yi Sheng
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Sung Min Han
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, USA
| | - Rui Xiao
- Department of Physiology and Aging, College of Medicine, University of Florida, Gainesville, FL, USA
- Center for Smell and Taste, University of Florida, Gainesville, FL, USA
- Institute on Aging, University of Florida, Gainesville, FL, USA
- Genetics Institute, University of Florida, Gainesville, FL, USA
- UF Health Cancer Center, University of Florida, Gainesville, FL, USA
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Effah F, Adragna J, Luglio D, Bailey A, Marczylo T, Gordon T. Toxicological assessment of E-cigarette flavored E-liquids aerosols using Calu-3 cells: A 3D lung model approach. Toxicology 2023; 500:153683. [PMID: 38013136 PMCID: PMC10826471 DOI: 10.1016/j.tox.2023.153683] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2023] [Revised: 11/19/2023] [Accepted: 11/22/2023] [Indexed: 11/29/2023]
Abstract
Scientific progress and ethical considerations are increasingly shifting the toxicological focus from in vivo animal models to in vitro studies utilizing physiologically relevant cell cultures. Consequently, we evaluated and validated a three-dimensional (3D) model of the human lung using Calu-3 cells cultured at an air-liquid interface (ALI) for 28 days. Assessment of seven essential genes of differentiation and transepithelial electrical resistance (TEER) measurements, in conjunction with mucin (MUC5AC) staining, validated the model. We observed a time-dependent increase in TEER, genetic markers of mucus-producing cells (muc5ac, muc5b), basal cells (trp63), ciliated cells (foxj1), and tight junctions (tjp1). A decrease in basal cell marker krt5 levels was observed. Subsequently, we utilized this validated ALI-cultured Calu-3 model to investigate the adversity of the aerosols generated from three flavored electronic cigarette (EC) e-liquids: cinnamon, vanilla tobacco, and hazelnut. These aerosols were compared against traditional cigarette smoke (3R4F) to assess their relative toxicity. The aerosols generated from PG/VG vehicle control, hazelnut and cinnamon e-liquids, but not vanilla tobacco, significantly decreased TEER and increased lactate dehydrogenase (LDH) release compared to the incubator and air-only controls. Compared to 3R4F, there were no significant differences in TEER or LDH with the tested flavored EC aerosols other than vanilla tobacco. This starkly contrasted our expectations, given the common perception of e-liquids as a safer alternative to cigarettes. Our study suggests that these results depend on flavor type. Therefore, we strongly advocate for further research, increased user awareness regarding flavors in ECs, and rigorous regulatory scrutiny to protect public health.
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Affiliation(s)
- Felix Effah
- Pharmacology Section, St George's University of London, Cranmer Terrace, SW17 0RE London, UK; UK Health Security Agency, Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxfordshire OX11 ORQ, UK.
| | - John Adragna
- Division of Environmental Medicine, New York University Langone Health, New York, NY, USA
| | - David Luglio
- Division of Environmental Medicine, New York University Langone Health, New York, NY, USA
| | - Alexis Bailey
- Pharmacology Section, St George's University of London, Cranmer Terrace, SW17 0RE London, UK
| | - Tim Marczylo
- UK Health Security Agency, Radiation, Chemical and Environmental Hazards, Chilton, Didcot, Oxfordshire OX11 ORQ, UK
| | - Terry Gordon
- Division of Environmental Medicine, New York University Langone Health, New York, NY, USA
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Liu J, Fu L, Yin F, Yin L, Song X, Guo H, Liu J. Diosmetin Maintains Barrier Integrity by Reducing the Expression of ABCG2 in Colonic Epithelial Cells. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2023. [PMID: 37269551 DOI: 10.1021/acs.jafc.3c00912] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Crohn's disease (CD) is a relapsing and chronic inflammatory bowel disease. Recent advances have highlighted that dysfunction of the barrier function formed by a polarized monolayer of columnar epithelial cells plays a crucial role in the pathophysiology of CD. At present, we reported that diosmetin increased cell viability by reducing the levels of TNFα and IL-6 in lipopolysaccharide (LPS)-treated colonic epithelial Caco-2 cells. Meanwhile, diosmetin conferred a direct effect on maintaining barrier integrity by reducing epithelial permeability and increasing the expression of proteins associated with tight junctions, including zonula occludens-l (ZO-1), occludin, and claudin-1, in LPS-treated Caco-2 cells and in 2,4,6-trinitrobenzene sulfonic acid-induced CD mice. Additionally, diosmetin decreased the protein content of adenosine triphosphate-binding cassette efflux transporter G2 (ABCG2) in vitro and in vivo. Over-expression of ABCG2 had an important impact on the epithelial permeability and barrier-related protein levels induced by LPS in Caco-2 cells. At the same time, Ko143, a specific ABCG2 inhibitor, dramatically enhanced the role of diosmetin in ZO-1 and occludin proteins in LPS-treated Caco-2 cells. Mechanically, diosmetin significantly attenuated the role of LPS in the phosphorylation of adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK), phosphatidylinositol-3-kinase (PI3K)/protein kinase B (PKB/AKT), and cAMP-response element binding protein (CREB) in Caco-2 cells. The AMPK inhibitor Compound C obviously prevented the effect of diosmetin on ZO-1 and occludin expression in LPS-treated Caco-2 cells. Taken together, the results of this study suggest that AMPK/AKT/CREB-mediated ABCG2 expression plays a crucial role in diosmetin, improving the barrier dysfunction in CD.
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Affiliation(s)
- Jinfan Liu
- Chongqing Key Laboratory of Medicinal Chemistry & Molecular Pharmacology, Chongqing University of Technology, Chongqing 400054, China
| | - Lu Fu
- Chongqing Key Laboratory of Medicinal Chemistry & Molecular Pharmacology, Chongqing University of Technology, Chongqing 400054, China
| | - Fei Yin
- Chongqing Key Laboratory of Medicinal Chemistry & Molecular Pharmacology, Chongqing University of Technology, Chongqing 400054, China
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China
| | - Li Yin
- Chongqing Key Laboratory of Medicinal Chemistry & Molecular Pharmacology, Chongqing University of Technology, Chongqing 400054, China
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China
| | - Xiaomei Song
- Department of Gastroenterology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 401147, People's Republic of China
| | - Hong Guo
- Department of Gastroenterology, Chongqing General Hospital, University of Chinese Academy of Sciences, Chongqing 401147, People's Republic of China
| | - Jianhui Liu
- Chongqing Key Laboratory of Medicinal Chemistry & Molecular Pharmacology, Chongqing University of Technology, Chongqing 400054, China
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing 400054, People's Republic of China
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Xia J, Li J, Deng M, Yin F, Liu J, Wang J. Diosmetin alleviates acute lung injury caused by lipopolysaccharide by targeting barrier function. Inflammopharmacology 2023:10.1007/s10787-023-01228-7. [PMID: 37074600 PMCID: PMC10113986 DOI: 10.1007/s10787-023-01228-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Accepted: 04/10/2023] [Indexed: 04/20/2023]
Abstract
Acute lung injury (ALI) is an acute and devastating disease caused by systemic inflammation e.g. patients infected with bacteria and viruses such as SARS-CoV-2 have an unacceptably high mortality rate. It has been well documented that endothelial cell damage and repair play a central role in the pathogenesis of ALI because of its barrier function. Nevertheless, the leading compounds that effectively accelerate endothelial cell repair and improve barrier dysfunction in ALI are largely unknown. In the present study, we found that diosmetin had promising characteristics to inhibit the inflammatory response and accelerate the repair of endothelial cells. Our results indicated that diosmetin accelerated wound healing and barrier repair by improving the expression of the barrier-related proteins, including zonula occludens-l (ZO-1) and occludin, in human umbilical vein endothelial cells (HUVECs) treated with lipopolysaccharide (LPS). Meanwhile, diosmetin administration significantly inhibited inflammatory response by decreasing the content of TNFα and IL-6 in the serum, alleviated lung injury by reducing lung wet/dry (W/D) ratio and histologic score, improved endothelial hyperpermeability by decreasing protein levels and neutrophil infiltration in the bronchoalveolar lavage fluid (BALF) and increasing ZO-1 and occludin expression in the lung tissues of LPS-treated mice. Mechanistically, diosmetin also mediated the expression of Rho A and ROCK1/2 in HUVECs treated with LPS, and fasudil, a Rho A inhibitor remarkably inhibited the role of diosmetin in ZO-1 and occludin proteins. All these findings of this study revealed that diosmetin can be an effective protector of lung injury and the Rho A/ROCK1/2 signal pathway plays a pivotal role in diosmetin accelerating barrier repair in ALI.
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Affiliation(s)
- Jiying Xia
- Chongqing Key Laboratory of Medicinal Chemistry and Molecular Pharmacology, Chongqing University of Technology, Hongguang Road 69, Ba'nan District, Chongqing, 400054, People's Republic of China
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, 400054, People's Republic of China
| | - Junhong Li
- Chongqing Key Laboratory of Medicinal Chemistry and Molecular Pharmacology, Chongqing University of Technology, Hongguang Road 69, Ba'nan District, Chongqing, 400054, People's Republic of China
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, 400054, People's Republic of China
| | - Mengsheng Deng
- Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China
| | - Fei Yin
- Chongqing Key Laboratory of Medicinal Chemistry and Molecular Pharmacology, Chongqing University of Technology, Hongguang Road 69, Ba'nan District, Chongqing, 400054, People's Republic of China
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, 400054, People's Republic of China
| | - Jianhui Liu
- Chongqing Key Laboratory of Medicinal Chemistry and Molecular Pharmacology, Chongqing University of Technology, Hongguang Road 69, Ba'nan District, Chongqing, 400054, People's Republic of China.
- College of Pharmacy and Bioengineering, Chongqing University of Technology, Chongqing, 400054, People's Republic of China.
| | - Jianmin Wang
- Research Institute of Surgery, Daping Hospital, Army Medical University, Chongqing, 400042, People's Republic of China.
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Ta W, Li X, Song J, Hua R, Zheng Y, Lu W. Customizable Dual-Fluorescent Nanoparticles for Tracing and Quantifying of Cell Transport. Int J Nanomedicine 2023; 18:1823-1834. [PMID: 37041817 PMCID: PMC10083028 DOI: 10.2147/ijn.s394953] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Accepted: 03/07/2023] [Indexed: 04/08/2023] Open
Abstract
Purpose Nanotechnology-based drug delivery systems (nano-DDS) have been developed to be a promising strategy to improve the efficacy, safety, physicochemical and pharmacokinetic/pharmacodynamics properties of drugs. It is very necessary to elucidate the delivery process in vivo or in cells for the rational design and accurate preparation of nano-DDS. The aim of this study was to construct a nano-DDS to visualize and quantify the intracellular behavior of the loaded cargo and carrier in such a system. Methods A carboxyl-terminal end of poly(lactic-co-glycolic acid) polymer was fluorescently labeled with rhodamine B by conjugation of ethylenediamine. Dual-fluorescent nanoparticles (DFPs) were prepared from this fluorescently labeled polymer to encapsulate a fluorescent cargo, coumarin 6. The carrier and cargo of DFPs were monitored by confocal fluorescence microscopy during cellular uptake. Furthermore, the transcellular transportation of DFPs was evaluated quantitatively by measuring the fluorescence intensity. Results The obtained fluorescent polymer showed stable and quantifiable characteristics. DFPs could be customized in terms of coumarin 6 content (97.7±1.0%), size (367.3±1.7 nm) and dual-emission fluorescence (green cargo and red carrier). DFPs did not significantly affect cell viability, the integrity of cell monolayers and the microscopic morphology at concentrations below 0.7 mg/mL within 3 h of co-incubation with Caco-2 cells. Multichannel fluorescence monitoring revealed that the fluorescence intensity of the carrier and cargo increased with time, but not synchronously. By calculating the residual, intracellular, and transport amounts of DFPs, the material balance between the total amount of cellular transport and the dose administered was obtained. Conclusion Based on the advantages of dual fluorescent labeling, the differential behavior of cell trafficking can be visualized and quantitatively analyzed for the cargo and carrier of DFPs. These results provide insights into the cellular transport process of holistic nanoparticles and complement our understanding of the biological behaviors of nano-DDS.
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Affiliation(s)
- Wenjing Ta
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Xingyue Li
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Jihong Song
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Ruochen Hua
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Yuting Zheng
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
| | - Wen Lu
- School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, People’s Republic of China
- Correspondence: Wen Lu, School of Pharmacy, Health Science Center, Xi’an Jiaotong University, Xi’an, 710061, People’s Republic of China, Email
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Krishnakumar A, Kadian S, Heredia Rivera U, Chittiboyina S, Lelièvre SA, Rahimi R. Organ-on-a-Chip Platform with an Integrated Screen-Printed Electrode Array for Real-Time Monitoring Trans-Epithelial Barrier and Bubble Formation. ACS Biomater Sci Eng 2023; 9:1620-1628. [PMID: 36763005 DOI: 10.1021/acsbiomaterials.2c00494] [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] [Indexed: 02/11/2023]
Abstract
Cellular tight junctions play a key role in establishing a barrier between different compartments of the body by regulating the selective passage of different solutes across epithelial and endothelial tissues. Over the past decade, significant efforts have been conducted to develop more clinically relevant "organ-on-a-chip" models with integrated trans-epithelial electrical resistance (TEER) monitoring systems to help better understand the fundamental underpinnings of epithelial tissue physiology upon exposure to different substances. However, most of these platforms require the use of high-cost and time-consuming photolithography processes, which limits their scalability and practical implementation in clinical research. To address this need, we have developed a low-cost microfluidic platform with an integrated electrode array that allows continuous real-time monitoring of TEER and the risk of bubble formation in the microfluidic system by using scalable manufacturing technologies such as screen printing and laser processing. The integrated printed electrode array exhibited excellent stability (with less than ∼0.02 Ω change in resistance) even after long-term exposure to a complex culture medium. As a proof of concept, the fully integrated platform was tested with HMT3522 S1 epithelial cells to evaluate the tight barrier junction formation through TEER measurement and validated with standard immunostaining procedures for Zonula occludens-1 protein. This platform could be regarded as a stepping stone for the fabrication of disposable and low-cost organ and tissue-on-a-chip models with integrated sensors to facilitate studying the dynamic response of epithelial tissues to different substances in more physiologically relevant conditions.
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Affiliation(s)
- Akshay Krishnakumar
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sachin Kadian
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Ulisses Heredia Rivera
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
| | - Shirisha Chittiboyina
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
- Department of Basic Medical Sciences, Purdue University, West Lafayette, Indiana 47907, United States
| | - Sophie A Lelièvre
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
- Department of Basic Medical Sciences, Purdue University, West Lafayette, Indiana 47907, United States
| | - Rahim Rahimi
- School of Electrical and Computer Engineering, Purdue University, West Lafayette, Indiana 47907, United States
- Birck Nanotechnology Center, Purdue University, West Lafayette, Indiana 47907, United States
- School of Materials Engineering, Purdue University, West Lafayette, Indiana 47907, United States
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Thomas DP, Zhang J, Nguyen NT, Ta HT. Microfluidic Gut-on-a-Chip: Fundamentals and Challenges. BIOSENSORS 2023; 13:bios13010136. [PMID: 36671971 PMCID: PMC9856111 DOI: 10.3390/bios13010136] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 01/10/2023] [Accepted: 01/11/2023] [Indexed: 06/03/2023]
Abstract
The human gut is responsible for food digestion and absorption. Recently, growing evidence has shown its vital role in the proper functioning of other organs. Advances in microfluidic technologies have made a significant impact on the biomedical field. Specifically, organ-on-a-chip technology (OoC), which has become a popular substitute for animal models, is capable of imitating complex systems in vitro and has been used to study pathology and pharmacology. Over the past decade, reviews published focused more on the applications and prospects of gut-on-a-chip (GOC) technology, but the challenges and solutions to these limitations were often overlooked. In this review, we cover the physiology of the human gut and review the engineering approaches of GOC. Fundamentals of GOC models including materials and fabrication, cell types, stimuli and gut microbiota are thoroughly reviewed. We discuss the present GOC model applications, challenges, possible solutions and prospects for the GOC models and technology.
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Affiliation(s)
- Dimple Palanilkunnathil Thomas
- Queensland Micro- and Nanotechnology, Griffith University, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Jun Zhang
- Queensland Micro- and Nanotechnology, Griffith University, Nathan, QLD 4111, Australia
| | - Nam-Trung Nguyen
- Queensland Micro- and Nanotechnology, Griffith University, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
| | - Hang Thu Ta
- Queensland Micro- and Nanotechnology, Griffith University, Nathan, QLD 4111, Australia
- School of Environment and Science, Griffith University, Nathan, QLD 4111, Australia
- Australian Institute for Bioengineering and Nanotechnology, The University of Queensland, St. Lucia, QLD 4072, Australia
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Groestlinger J, Seidl C, Varga E, Del Favero G, Marko D. Combinatory Exposure to Urolithin A, Alternariol, and Deoxynivalenol Affects Colon Cancer Metabolism and Epithelial Barrier Integrity in vitro. Front Nutr 2022; 9:882222. [PMID: 35811943 PMCID: PMC9263571 DOI: 10.3389/fnut.2022.882222] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2022] [Accepted: 04/15/2022] [Indexed: 12/13/2022] Open
Abstract
The human gastrointestinal tract is an important site of nutrient absorption and a crucial barrier against xenobiotics. It regularly faces “chemical cocktails” composed of food constituents, their human and microbial metabolites, and foodborne contaminants, such as mycotoxins. Hence, the colonic epithelium adapts to dietary molecules tuning its immune response, structural integrity, and metabolism to maintain intestinal homeostasis. While gut microbiota metabolites of berry ellagitannins, such as urolithin A (Uro A) might contribute to physiological epithelial barrier integrity, foodborne co-contaminating mycotoxins like alternariol (AOH) and deoxynivalenol (DON) could hamper epithelial function. Hence, we investigated the response of differentiated Caco-2 cells (clone C2BBe1) in vitro to the three compounds alone or in binary mixtures. In virtue of the possible interactions of Uro A, AOH, and DON with the aryl hydrocarbon receptor (AhR) pathway, potential effects on phase-I-metabolism enzymes and epithelial structural integrity were taken as endpoints for the evaluation. Finally, Liquid chromatography tandem mass spectrometry measurements elucidated the absorption, secretion, and metabolic capacity of the cells under single and combinatory exposure scenarios. Uro A and AOH as single compounds, and as a binary mixture, were capable to induce CYP1A1/1A2/1B1 enzymes triggered by the AhR pathway. In light of its ribosome inhibiting capacity, the trichothecene suppressed the effects of both dibenzo-α-pyrones. In turn, cellular responsiveness to Uro A and AOH could be sustained when co-exposed to DON-3-sulfate, instead of DON. Colonic epithelial structural integrity was rather maintained after incubation with Uro A and AOH: this was reinforced in the combinatory exposure scenario and disrupted by DON, an effect, opposed in combination. Passage through the cells as well as the metabolism of Uro A and AOH were rather influenced by co-exposure to DON, than by interaction with each other. Therefore, we conclude that although single foodborne bioactive substances individually could either support or disrupt the epithelial structure and metabolic capacity of colon cancer, exposure to chemical mixtures changes the experimental outcome and calls for the need of combinatory investigations for proper risk assessment.
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Affiliation(s)
- Julia Groestlinger
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Carina Seidl
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Elisabeth Varga
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
| | - Giorgia Del Favero
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Core Facility Multimodal Imaging, Faculty of Chemistry, University of Vienna, Vienna, Austria
- *Correspondence: Giorgia Del Favero,
| | - Doris Marko
- Department of Food Chemistry and Toxicology, Faculty of Chemistry, University of Vienna, Vienna, Austria
- Doris Marko,
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Choi J, Mathew S, Oerter S, Appelt-Menzel A, Hansmann J, Schmitz T. Online Measurement System for Dynamic Flow Bioreactors to Study Barrier Integrity of hiPSC-Based Blood-Brain Barrier In Vitro Models. Bioengineering (Basel) 2022; 9:bioengineering9010039. [PMID: 35049748 PMCID: PMC8773345 DOI: 10.3390/bioengineering9010039] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2021] [Revised: 01/11/2022] [Accepted: 01/11/2022] [Indexed: 12/31/2022] Open
Abstract
Electrochemical impedance spectroscopy (EIS) is a noninvasive, reliable, and efficient method to analyze the barrier integrity of in vitro tissue models. This well-established tool is used most widely to quantify the transendothelial/epithelial resistance (TEER) of Transwell-based models cultured under static conditions. However, dynamic culture in bioreactors can achieve advanced cell culture conditions that mimic a more tissue-specific environment and stimulation. This requires the development of culture systems that also allow for the assessment of barrier integrity under dynamic conditions. Here, we present a bioreactor system that is capable of the automated, continuous, and non-invasive online monitoring of cellular barrier integrity during dynamic culture. Polydimethylsiloxane (PDMS) casting and 3D printing were used for the fabrication of the bioreactors. Additionally, attachable electrodes based on titanium nitride (TiN)-coated steel tubes were developed to perform EIS measurements. In order to test the monitored bioreactor system, blood–brain barrier (BBB) in vitro models derived from human-induced pluripotent stem cells (hiPSC) were cultured for up to 7 days. We applied equivalent electrical circuit fitting to quantify the electrical parameters of the cell layer and observed that TEER gradually decreased over time from 2513 Ω·cm2 to 285 Ω·cm2, as also specified in the static control culture. Our versatile system offers the possibility to be used for various dynamic tissue cultures that require a non-invasive monitoring system for barrier integrity.
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Affiliation(s)
- Jihyoung Choi
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany; (S.M.); (J.H.); (T.S.)
- Correspondence: (J.C.); (A.A.-M.)
| | - Sanjana Mathew
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany; (S.M.); (J.H.); (T.S.)
| | - Sabrina Oerter
- Translational Center for Regenerative Therapies, Fraunhofer Institute for Silicate Research, Röntgenring 11, 97070 Würzburg, Germany;
| | - Antje Appelt-Menzel
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany; (S.M.); (J.H.); (T.S.)
- Translational Center for Regenerative Therapies, Fraunhofer Institute for Silicate Research, Röntgenring 11, 97070 Würzburg, Germany;
- Correspondence: (J.C.); (A.A.-M.)
| | - Jan Hansmann
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany; (S.M.); (J.H.); (T.S.)
- Faculty of Electronics, University of Applied Science Würzburg-Schweinfurt, Ignaz-Schön-Straße 11, 97421 Schweinfurt, Germany
| | - Tobias Schmitz
- Department of Tissue Engineering and Regenerative Medicine, University Hospital Würzburg, Röntgenring 11, 97070 Würzburg, Germany; (S.M.); (J.H.); (T.S.)
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Taatjes DJ, Roth J. In focus in HCB. Histochem Cell Biol 2021; 156:519-522. [PMID: 34854973 DOI: 10.1007/s00418-021-02050-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Affiliation(s)
- Douglas J Taatjes
- Department of Pathology and Laboratory Medicine, Larner College of Medicine, University of Vermont, Burlington, VT, 05405, USA.
| | - Jürgen Roth
- University of Zurich, CH-8091, Zurich, Switzerland
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