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Cofiño-Fabres C, Boonen T, Rivera-Arbeláez JM, Rijpkema M, Blauw L, Rensen PCN, Schwach V, Ribeiro MC, Passier R. Micro-Engineered Heart Tissues On-Chip with Heterotypic Cell Composition Display Self-Organization and Improved Cardiac Function. Adv Healthc Mater 2024; 13:e2303664. [PMID: 38471185 DOI: 10.1002/adhm.202303664] [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] [Revised: 01/30/2024] [Indexed: 03/14/2024]
Abstract
Advanced in vitro models that recapitulate the structural organization and function of the human heart are highly needed for accurate disease modeling, more predictable drug screening, and safety pharmacology. Conventional 3D Engineered Heart Tissues (EHTs) lack heterotypic cell complexity and culture under flow, whereas microfluidic Heart-on-Chip (HoC) models in general lack the 3D configuration and accurate contractile readouts. In this study, an innovative and user-friendly HoC model is developed to overcome these limitations, by culturing human pluripotent stem cell (hPSC)-derived cardiomyocytes (CMs), endothelial (ECs)- and smooth muscle cells (SMCs), together with human cardiac fibroblasts (FBs), underflow, leading to self-organized miniaturized micro-EHTs (µEHTs) with a CM-EC interface reminiscent of the physiological capillary lining. µEHTs cultured under flow display enhanced contractile performance and conduction velocity. In addition, the presence of the EC layer altered drug responses in µEHT contraction. This observation suggests a potential barrier-like function of ECs, which may affect the availability of drugs to the CMs. These cardiac models with increased physiological complexity, will pave the way to screen for therapeutic targets and predict drug efficacy.
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Affiliation(s)
- Carla Cofiño-Fabres
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, 7522 NB, The Netherlands
| | - Tom Boonen
- River BioMedics B.V, Enschede, 7522 NB, The Netherlands
| | - José M Rivera-Arbeláez
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, 7522 NB, The Netherlands
- BIOS Lab-on-a-Chip Group, MESA+ Institute for Nanotechnology, Max Planck Institute for Complex Fluid Dynamics, University of Twente, Enschede, 7522 NB, The Netherlands
| | - Minke Rijpkema
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, 2300 RC, The Netherlands
| | - Lisanne Blauw
- River BioMedics B.V, Enschede, 7522 NB, The Netherlands
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, 2300 RC, The Netherlands
| | - Patrick C N Rensen
- Department of Medicine, Division of Endocrinology, and Einthoven Laboratory for Experimental Vascular Medicine, Leiden University Medical Center, Leiden, 2300 RC, The Netherlands
| | - Verena Schwach
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, 7522 NB, The Netherlands
| | - Marcelo C Ribeiro
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, 7522 NB, The Netherlands
- River BioMedics B.V, Enschede, 7522 NB, The Netherlands
| | - Robert Passier
- Department of Applied Stem Cell Technologies, TechMed Centre, University of Twente, Enschede, 7522 NB, The Netherlands
- Department of Anatomy and Embryology, Leiden University Medical Centre, Leiden, 2300 RC, The Netherlands
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2
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Liu Q, Zou J, Chen Z, He W, Wu W. Current research trends of nanomedicines. Acta Pharm Sin B 2023; 13:4391-4416. [PMID: 37969727 PMCID: PMC10638504 DOI: 10.1016/j.apsb.2023.05.018] [Citation(s) in RCA: 17] [Impact Index Per Article: 17.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Revised: 04/25/2023] [Accepted: 05/05/2023] [Indexed: 11/17/2023] Open
Abstract
Owing to the inherent shortcomings of traditional therapeutic drugs in terms of inadequate therapeutic efficacy and toxicity in clinical treatment, nanomedicine designs have received widespread attention with significantly improved efficacy and reduced non-target side effects. Nanomedicines hold tremendous theranostic potential for treating, monitoring, diagnosing, and controlling various diseases and are attracting an unfathomable amount of input of research resources. Against the backdrop of an exponentially growing number of publications, it is imperative to help the audience get a panorama image of the research activities in the field of nanomedicines. Herein, this review elaborates on the development trends of nanomedicines, emerging nanocarriers, in vivo fate and safety of nanomedicines, and their extensive applications. Moreover, the potential challenges and the obstacles hindering the clinical translation of nanomedicines are also discussed. The elaboration on various aspects of the research trends of nanomedicines may help enlighten the readers and set the route for future endeavors.
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Affiliation(s)
- Qiuyue Liu
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, China
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China
| | - Jiahui Zou
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Zhongjian Chen
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, China
| | - Wei He
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, China
- School of Pharmacy, China Pharmaceutical University, Nanjing 211198, China
| | - Wei Wu
- Shanghai Skin Disease Hospital, Tongji University School of Medicine, Shanghai 200443, China
- Shanghai Pudong Hospital, Fudan University Pudong Medical Center, Shanghai 201399, China
- Key Laboratory of Smart Drug Delivery of MOE, School of Pharmacy, Fudan University, Shanghai 201203, China
- Fudan Zhangjiang Institute, Shanghai 201203, China
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3
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Li J, Peng H, Ji W, Lu D, Wang N, Peng C, Zhang W, Li M, Li Y. Advances in surface-modified nanometal-organic frameworks for drug delivery. Int J Pharm 2023:123119. [PMID: 37302666 DOI: 10.1016/j.ijpharm.2023.123119] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2023] [Revised: 06/05/2023] [Accepted: 06/06/2023] [Indexed: 06/13/2023]
Abstract
Nanometal-organic frameworks (NMOFs) are porous network structures composed of metal ions or metal clusters through self-assembly. NMOFs have been considered as a promising nano-drug delivery system due to their unique properties such as pore and flexible structures, large specific surface areas, surface modifiability, non-toxic and degradable properties. However, NMOFs face a series complex environment during in vivo delivery. Therefore, surface functionalization of NMOFs is vital to ensure that the structure of NMOFs remain stable during delivery, and can overcome physiological barriers to deliver drugs more accurately to specific sites, and achieve controllable release. In this review, the first part summarizes the physiological barriers that NMOFs faced during drug delivery after intravenous injection and oral administration. The second part summarizes the current main ways to load drugs into NMOFs, mainly including pore adsorption, surface attachment, formation of covalent/coordination bonds between drug molecules and NMOFs, and in situ encapsulation. The third part is the main review part of this paper, which summarizes the surface modification methods of NMOFs used in recent years to overcome the physiological barriers and achieve effective drug delivery and disease therapy, which are mainly divided into physical modifications and chemical modifications. Finally, the full text is summarized and prospected, with the hope to provide ideas for the future development of NMOFs as drug delivery.
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Affiliation(s)
- Jiaxin Li
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Huan Peng
- Protein Science Key Laboratory of the Ministry of Education, School of Pharmaceutical Sciences, Tsinghua University, Beijing, 100084, China
| | - Weihong Ji
- Institute of Biomaterials and Tissue Engineering, Fujian Provincial Key Laboratory of Biochemical Technology, Huaqiao University, Xiamen, 361021, China
| | - Dengyang Lu
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Nan Wang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Chen Peng
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Wen Zhang
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Muzi Li
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
| | - Yan Li
- Beijing Key Laboratory for Bioengineering and Sensing Technology, School of Chemistry and Biological Engineering, University of Science and Technology Beijing, Beijing, 100083, China
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4
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Identification of Nanoparticle Properties for Optimal Drug Delivery across a Physiological Cell Barrier. Pharmaceutics 2023; 15:pharmaceutics15010200. [PMID: 36678829 PMCID: PMC9865979 DOI: 10.3390/pharmaceutics15010200] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Revised: 12/27/2022] [Accepted: 12/30/2022] [Indexed: 01/09/2023] Open
Abstract
Nanoparticles (NPs) represent an attractive strategy to overcome difficulties associated with the delivery of therapeutics. Knowing the optimal properties of NPs to address these issues could allow for improved in vivo responses. This work investigated NPs prepared from 5 materials of 3 sizes and 3 concentrations applied to a cell barrier model. The NPs permeability across a cell barrier and their effects on cell barrier integrity and cell viability were evaluated. The properties of these NPs, as determined in water (traditional) vs. media (realistic), were compared to cell responses. It was found that for all cellular activities, NP properties determined in media was the best predictor of the cell response. Notably, ZnO NPs caused significant alterations to cell viability across all 3 cell lines tested. Importantly, we report that the zeta potential of NPs correlates significantly with NP permeability and NP-induced changes in cell viability. NPs with physiological-based zeta potential of -12 mV result in good cell barrier penetration without considerable changes in cell viability.
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5
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Pandey M, Ting JSS, Gorain B, Jain N, Mayuren J. Miniaturized Polymeric Systems for the Intravaginal Gene Therapies: Recent Update on Unconventional Delivery. Curr Pharm Des 2023; 29:3254-3262. [PMID: 37438899 DOI: 10.2174/1381612829666230712162540] [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: 01/25/2023] [Revised: 04/01/2023] [Accepted: 04/14/2023] [Indexed: 07/14/2023]
Abstract
The prevalence of vaginal infection is increasing among women, especially at reproductive age. For proper eradication of infection, the effective concentration of a drug is required at the infection site. Therefore, local delivery is recommended to exert a direct therapeutic effect at the site action that causes a reduction in dose and side effects. The main focus of vaginal drug delivery is to enhance retention time and patient compliance. The high recurrence rate of vaginal infection due to the lack of effective treatment strategies opens the door for new therapeutic approaches. To combat these setbacks, intravaginal gene therapies have been investigated. High attention has been gained by vaginal gene therapy, especially for sexually transmitted infection treatment. Despite much research, no product is available in the market, although in vitro and preclinical data support the vaginal route as an effective route for gene administration. The main focus of this review is to discuss the recent advancement in miniaturized polymeric systems for intravaginal gene therapies to treat local infections. An overview of different barriers to vaginal delivery and challenges of vaginal infection treatment are also summarised.
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Affiliation(s)
- Manisha Pandey
- Department of Pharmaceutical Sciences, Central University of Haryana, Haryana 123031, India
- Department of Pharmaceutical Technology, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia
| | | | - Bapi Gorain
- Department of Pharmaceutical Sciences and Technology, Birla Institute of Technology, Mesra, Ranchi 835215, India
| | - Neha Jain
- Department of Pharmaceutics, Amity Institute of Pharmacy, Amity University, Noida, India
| | - Jayashree Mayuren
- Department of Pharmaceutical Technology, School of Pharmacy, International Medical University, Kuala Lumpur 57000, Malaysia
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6
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Rousou C, de Maar J, Qiu B, van der Wurff-Jacobs K, Ruponen M, Urtti A, Oliveira S, Moonen C, Storm G, Mastrobattista E, Deckers R. The Effect of Microbubble-Assisted Ultrasound on Molecular Permeability across Cell Barriers. Pharmaceutics 2022; 14:494. [PMID: 35335871 PMCID: PMC8949944 DOI: 10.3390/pharmaceutics14030494] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/16/2022] [Accepted: 02/22/2022] [Indexed: 02/06/2023] Open
Abstract
The combination of ultrasound and microbubbles (USMB) has been applied to enhance drug permeability across tissue barriers. Most studies focused on only one physicochemical aspect (i.e., molecular weight of the delivered molecule). Using an in vitro epithelial (MDCK II) cell barrier, we examined the effects of USMB on the permeability of five molecules varying in molecular weight (182 Da to 20 kDa) and hydrophilicity (LogD at pH 7.4 from 1.5 to highly hydrophilic). Treatment of cells with USMB at increasing ultrasound pressures did not have a significant effect on the permeability of small molecules (molecular weight 259 to 376 Da), despite their differences in hydrophilicity (LogD at pH 7.4 from -3.2 to 1.5). The largest molecules (molecular weight 4 and 20 kDa) showed the highest increase in the epithelial permeability (3-7-fold). Simultaneously, USMB enhanced intracellular accumulation of the same molecules. In the case of the clinically relevant anti- C-X-C Chemokine Receptor Type 4 (CXCR4) nanobody (molecular weight 15 kDa), USMB enhanced paracellular permeability by two-fold and increased binding to retinoblastoma cells by five-fold. Consequently, USMB is a potential tool to improve the efficacy and safety of the delivery of drugs to organs protected by tissue barriers, such as the eye and the brain.
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Affiliation(s)
- Charis Rousou
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands; (C.R.); (B.Q.); (K.v.d.W.-J.); (S.O.); (G.S.)
- Imaging and Oncology Division, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands; (J.d.M.); (C.M.); (R.D.)
| | - Josanne de Maar
- Imaging and Oncology Division, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands; (J.d.M.); (C.M.); (R.D.)
| | - Boning Qiu
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands; (C.R.); (B.Q.); (K.v.d.W.-J.); (S.O.); (G.S.)
| | - Kim van der Wurff-Jacobs
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands; (C.R.); (B.Q.); (K.v.d.W.-J.); (S.O.); (G.S.)
| | - Marika Ruponen
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Yliopistonranta 1 C, 70210 Kuopio, Finland; (M.R.); (A.U.)
| | - Arto Urtti
- School of Pharmacy, Faculty of Health Sciences, University of Eastern Finland, Yliopistonranta 1 C, 70210 Kuopio, Finland; (M.R.); (A.U.)
- Division of Pharmaceutical Biosciences, Faculty of Pharmacy, University of Helsinki, Yliopistonkatu 4, 00100 Helsinki, Finland
- Institute of Chemistry, Saint Petersburg State University, Lieutenant Schmidt emb., 11/2, 199034 Saint Petersburg, Russia
| | - Sabrina Oliveira
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands; (C.R.); (B.Q.); (K.v.d.W.-J.); (S.O.); (G.S.)
- Cell Biology, Neurobiology and Biophysics, Department of Biology, Faculty of Science, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands
| | - Chrit Moonen
- Imaging and Oncology Division, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands; (J.d.M.); (C.M.); (R.D.)
| | - Gert Storm
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands; (C.R.); (B.Q.); (K.v.d.W.-J.); (S.O.); (G.S.)
- Department of Surgery, Yong Loo Lin School of Medicine, National University of Singapore, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore
- Department of Biomaterials Science and Technology, University of Twente, Drienerlolaan 5, 7522 NB Enschede, The Netherlands
| | - Enrico Mastrobattista
- Department of Pharmaceutical Sciences, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Heidelberglaan 8, 3584 CS Utrecht, The Netherlands; (C.R.); (B.Q.); (K.v.d.W.-J.); (S.O.); (G.S.)
| | - Roel Deckers
- Imaging and Oncology Division, University Medical Center Utrecht, Heidelberglaan 100, 3584 CX Utrecht, The Netherlands; (J.d.M.); (C.M.); (R.D.)
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7
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Lechner K, Zeeshana M, Noack M, Ali H, Neurath M, Weigmanna B. Small but powerful: Will nanoparticles be the future state‐of‐the‐art therapy for IBD? Expert Opin Drug Deliv 2022; 19:235-245. [DOI: 10.1080/17425247.2022.2043847] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Kristina Lechner
- Medical Clinic I, University Hospital Erlangen, Research Campus, Hartmannstr.14, 91052, Erlangen, 91052 Erlangen, Germany
| | - Mahira Zeeshana
- Department of Pharmacy, Faculty of Biological Sciences, Quaid‐i‐Azam University, Islamabad, 45320, Pakistan
| | - Maxi Noack
- Medical Clinic I, University Hospital Erlangen, Research Campus, Hartmannstr.14, 91052, Erlangen, 91052 Erlangen, Germany
| | - Hussain Ali
- Department of Pharmacy, Faculty of Biological Sciences, Quaid‐i‐Azam University, Islamabad, 45320, Pakistan
| | - Markus Neurath
- Medical Clinic I, University Hospital Erlangen, Ulmenweg 14, 91054 Erlangen, Germany
- Deutsches Zentrum Immuntherapie (DZI), Ulmenweg 18, 91054 Erlangen, Germany
| | - Benno Weigmanna
- Medical Immunology Campus Erlangen, Medical Clinic 1, Friedrich‐Alexander University, Erlangen‐Nürnberg, Erlangen, Germany
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Lieberth K, Romele P, Torricelli F, Koutsouras DA, Brückner M, Mailänder V, Gkoupidenis P, Blom PWM. Current-Driven Organic Electrochemical Transistors for Monitoring Cell Layer Integrity with Enhanced Sensitivity. Adv Healthc Mater 2021; 10:e2100845. [PMID: 34309226 DOI: 10.1002/adhm.202100845] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2021] [Revised: 07/06/2021] [Indexed: 01/28/2023]
Abstract
In this progress report an overview is given on the use of the organic electrochemical transistor (OECT) as a biosensor for impedance sensing of cell layers. The transient OECT current can be used to detect changes in the impedance of the cell layer, as shown by Jimison et al. To circumvent the application of a high gate bias and preventing electrolysis of the electrolyte, in case of small impedance variations, an alternative measuring technique based on an OECT in a current-driven configuration is developed. The ion-sensitivity is larger than 1200 mV V-1 dec-1 at low operating voltage. It can be even further enhanced using an OECT based complementary amplifier, which consists of a p-type and an n-type OECT connected in series, as known from digital electronics. The monitoring of cell layer integrity and irreversible disruption of barrier function with the current-driven OECT is demonstrated for an epithelial Caco-2 cell layer, showing the enhanced ion-sensitivity as compared to the standard OECT configuration. As a state-of-the-art application of the current-driven OECT, the in situ monitoring of reversible tight junction modulation under the effect of drug additives, like poly-l-lysine, is discussed. This shows its potential for in vitro and even in vivo toxicological and drug delivery studies.
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Affiliation(s)
- Katharina Lieberth
- Max Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany
| | - Paolo Romele
- Department of Information Engineering University of Brescia Via Branze 38 Brescia 25123 Italy
| | - Fabrizio Torricelli
- Department of Information Engineering University of Brescia Via Branze 38 Brescia 25123 Italy
| | | | - Maximilian Brückner
- Max Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany
- Dermatology Clinic University Medical Center of the Johannes Gutenberg‐University Mainz Langenbeckstr. 1 Mainz 55131 Germany
| | - Volker Mailänder
- Max Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany
- Dermatology Clinic University Medical Center of the Johannes Gutenberg‐University Mainz Langenbeckstr. 1 Mainz 55131 Germany
| | | | - Paul W. M. Blom
- Max Planck Institute for Polymer Research Ackermannweg 10 Mainz 55128 Germany
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Finbloom JA, Sousa F, Stevens MM, Desai TA. Engineering the drug carrier biointerface to overcome biological barriers to drug delivery. Adv Drug Deliv Rev 2020; 167:89-108. [PMID: 32535139 PMCID: PMC10822675 DOI: 10.1016/j.addr.2020.06.007] [Citation(s) in RCA: 80] [Impact Index Per Article: 20.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2020] [Revised: 06/04/2020] [Accepted: 06/05/2020] [Indexed: 02/06/2023]
Abstract
Micro and nanoscale drug carriers must navigate through a plethora of dynamic biological systems prior to reaching their tissue or disease targets. The biological obstacles to drug delivery come in many forms and include tissue barriers, mucus and bacterial biofilm hydrogels, the immune system, and cellular uptake and intracellular trafficking. The biointerface of drug carriers influences how these carriers navigate and overcome biological barriers for successful drug delivery. In this review, we examine how key material design parameters lead to dynamic biointerfaces and improved drug delivery across biological barriers. We provide a brief overview of approaches used to engineer key physicochemical properties of drug carriers, such as morphology, surface chemistry, and topography, as well as the development of dynamic responsive materials for barrier navigation. We then discuss essential biological barriers and how biointerface engineering can enable drug carriers to better navigate and overcome these barriers to drug delivery.
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Affiliation(s)
- Joel A Finbloom
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, USA
| | - Flávia Sousa
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Molly M Stevens
- Department of Materials, Department of Bioengineering and Institute of Biomedical Engineering, Imperial College London, London SW7 2AZ, United Kingdom
| | - Tejal A Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, CA, USA.
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Lee DF, Stewart GR, Chambers MA. Modelling early events in Mycobacterium bovis infection using a co-culture model of the bovine alveolus. Sci Rep 2020; 10:18495. [PMID: 33116165 PMCID: PMC7595104 DOI: 10.1038/s41598-020-75113-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2020] [Accepted: 09/21/2020] [Indexed: 01/01/2023] Open
Abstract
Bovine tuberculosis (bTB), a zoonosis mainly caused by Mycobacterium bovis has severe socio-economic consequences and impact on animal health. Host-pathogen interactions during M. bovis infection are poorly understood, especially early events which are difficult to follow in vivo. This study describes the utilisation of an in vitro co-culture model, comprising immortalised bovine alveolar type II (BATII) epithelial cells and bovine pulmonary arterial endothelial cells (BPAECs). When cultured at air-liquid interface, it was possible to follow the migration of live M. bovis Bacille Calmette-Guérin (BCG) and to observe interactions with each cell type, alongside cytokine release. Infection with BCG was shown to exert a detrimental effect primarily upon epithelial cells, with corresponding increases in IL8, TNFα, IL22 and IL17a cytokine release, quantified by ELISA. BCG infection increased expression of CD54, MHC Class I and II molecules in endothelial but not epithelial cells, which exhibited constitutive expression. The effect of peripheral blood mononuclear cell conditioned medium from vaccinated cattle upon apical-basolateral migration of BCG was examined by quantifying recovered BCG from the apical, membrane and basolateral fractions over time. The numbers of recovered BCG in each fraction were unaffected by the presence of PBMC conditioned medium, with no observable differences between vaccinated and naïve animals.
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Affiliation(s)
- Diane Frances Lee
- School of Veterinary Medicine, University of Surrey, Guildford, Surrey, UK.
| | | | - Mark Andrew Chambers
- School of Veterinary Medicine, University of Surrey, Guildford, Surrey, UK
- School of Biosciences and Medicine, University of Surrey, Guildford, Surrey, UK
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11
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Zhang M, Merlin D. Nanoparticle-Based Oral Drug Delivery Systems Targeting the Colon for Treatment of Ulcerative Colitis. Inflamm Bowel Dis 2018; 24:1401-1415. [PMID: 29788186 PMCID: PMC6085987 DOI: 10.1093/ibd/izy123] [Citation(s) in RCA: 91] [Impact Index Per Article: 15.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Indexed: 12/17/2022]
Abstract
10.1093/ibd/izy123_video1izy123.video15786481867001.
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Affiliation(s)
- Mingzhen Zhang
- Institute for Biomedical Sciences, Digestive Diseases Research Group, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia
| | - Didier Merlin
- Institute for Biomedical Sciences, Digestive Diseases Research Group, Center for Diagnostics and Therapeutics, Georgia State University, Atlanta, Georgia
- Alanta Veterans Affairs Medical Center, Decatur, Georgia
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12
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Zeiadeh I, Najjar A, Karaman R. Strategies for Enhancing the Permeation of CNS-Active Drugs through the Blood-Brain Barrier: A Review. Molecules 2018; 23:molecules23061289. [PMID: 29843371 PMCID: PMC6100436 DOI: 10.3390/molecules23061289] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 05/22/2018] [Accepted: 05/24/2018] [Indexed: 01/03/2023] Open
Abstract
Background: The blood brain barrier (BBB) is a dynamic and functional structure which poses a vast challenge in the development of drugs acting on the central nervous system (CNS). While most substances are denied BBB crossing, selective penetration of substances mainly occurs through diffusion, carrier mediated transport, or receptor mediated transcytosis. Methods: Strategies in enhancing BBB penetration have been reviewed and summarized in accordance with their type of formulation. Highlights in monoclonal antibodies, peptide-vectors, nanoparticles, and simple prodrugs were included. Conclusion: Nanoparticles and simple prodrugs, for example, can be used for efficient BBB penetration through inhibition of efflux mechanisms, however, monoclonal antibodies are the most promising strategy in BBB penetration. Close follow-up of future development in this area should confirm our expectation.
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Affiliation(s)
- Isra' Zeiadeh
- Department of Bioorganic & Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Quds University, Jerusalem P.O. Box 20002, Palestine.
| | - Anas Najjar
- Department of Bioorganic & Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Quds University, Jerusalem P.O. Box 20002, Palestine.
| | - Rafik Karaman
- Department of Bioorganic & Pharmaceutical Chemistry, Faculty of Pharmacy, Al-Quds University, Jerusalem P.O. Box 20002, Palestine.
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Strong P, Ito K, Murray J, Rapeport G. Current approaches to the discovery of novel inhaled medicines. Drug Discov Today 2018; 23:1705-1717. [PMID: 29775668 DOI: 10.1016/j.drudis.2018.05.017] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2018] [Revised: 04/11/2018] [Accepted: 05/10/2018] [Indexed: 01/16/2023]
Abstract
Inhaled administration is underutilised because the drug discovery process is viewed as challenging, risky, and expensive. However, unmet medical need continues to grow, and significant opportunities exist to discover novel inhaled medicines delivering the required lung concentrations while minimising systemic exposure. This profile could be achieved by a combination of properties, including lung retention and low oral bioavailability. Property-based rules exist for orally administered compounds, but there has been limited progress defining in silico predictors to guide the discovery of novel inhaled drugs. Recently, the use of informative cell- and tissue-based screens has greatly facilitated the identification of compounds with optimal characteristics for inhaled delivery. Here, we address opportunities for novel inhaled drugs, and the key challenges and uncertainties hampering progress.
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Affiliation(s)
- Peter Strong
- Pulmocide Ltd, 52 Princes Gate, Exhibition Road, London SW7 2 PG, UK
| | - Kazuhiro Ito
- Pulmocide Ltd, 52 Princes Gate, Exhibition Road, London SW7 2 PG, UK
| | - John Murray
- Pulmocide Ltd, 52 Princes Gate, Exhibition Road, London SW7 2 PG, UK
| | - Garth Rapeport
- Pulmocide Ltd, 52 Princes Gate, Exhibition Road, London SW7 2 PG, UK.
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Lind JU, Yadid M, Perkins I, O'Connor BB, Eweje F, Chantre CO, Hemphill MA, Yuan H, Campbell PH, Vlassak JJ, Parker KK. Cardiac microphysiological devices with flexible thin-film sensors for higher-throughput drug screening. LAB ON A CHIP 2017; 17:3692-3703. [PMID: 28976521 PMCID: PMC5810940 DOI: 10.1039/c7lc00740j] [Citation(s) in RCA: 86] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/07/2023]
Abstract
Microphysiological systems and organs-on-chips promise to accelerate biomedical and pharmaceutical research by providing accurate in vitro replicas of human tissue. Aside from addressing the physiological accuracy of the model tissues, there is a pressing need for improving the throughput of these platforms. To do so, scalable data acquisition strategies must be introduced. To this end, we here present an instrumented 24-well plate platform for higher-throughput studies of engineered human stem cell-derived cardiac muscle tissues that recapitulate the laminar structure of the native ventricle. In each well of the platform, an embedded flexible strain gauge provides continuous and non-invasive readout of the contractile stress and beat rate of an engineered cardiac tissue. The sensors are based on micro-cracked titanium-gold thin films, which ensure that the sensors are highly compliant and robust. We demonstrate the value of the platform for toxicology and drug-testing purposes by performing 12 complete dose-response studies of cardiac and cardiotoxic drugs. Additionally, we showcase the ability to couple the cardiac tissues with endothelial barriers. In these studies, which mimic the passage of drugs through the blood vessels to the musculature of the heart, we regulate the temporal onset of cardiac drug responses by modulating endothelial barrier permeability in vitro.
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Affiliation(s)
- Johan U Lind
- Disease Biophysics Group, John A. Paulson School of Engineering and Applied Sciences, Wyss Institute for Biologically Inspired Engineering, Harvard University, 29 Oxford St., Pierce Hall 321, Cambridge, Massachusetts 02138, USA.
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15
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Wilkinson EL, Sidaway JE, Cross MJ. Statin regulated ERK5 stimulates tight junction formation and reduces permeability in human cardiac endothelial cells. J Cell Physiol 2017. [PMID: 28639275 PMCID: PMC5655747 DOI: 10.1002/jcp.26064] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The MEKK3/MEK5/ERK5 signaling axis is required for cardiovascular development in vivo. We analyzed the physiological role of ERK5 in cardiac endothelial cells and the consequence of activation of this kinase by the statin class of HMG Co‐A reductase inhibitor drugs. We utilized human cardiac microvascular endothelial cells (HCMECs) and altered ERK5 expression using siRNA mediated gene silencing or overexpression of constitutively active MEK5 and ERK5 to reveal a role for ERK5 in regulating endothelial tight junction formation and cell permeability. Statin treatment of HCMECs stimulated activation of ERK5 and translocation to the plasma membrane resulting in co‐localization with the tight junction protein ZO‐1 and a concomitant reduction in endothelial cell permeability. Statin mediated activation of ERK5 was a consequence of reduced isoprenoid synthesis following HMG Co‐A reductase inhibition. Statin pretreatment could overcome the effect of doxorubicin in reducing endothelial tight junction formation and prevent increased permeability. Our data provide the first evidence for the role of ERK5 in regulating endothelial tight junction formation and endothelial cell permeability. Statin mediated ERK5 activation and the resulting decrease in cardiac endothelial cell permeability may contribute to the cardioprotective effects of statins in reducing doxorubicin‐induced cardiotoxicity.
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Affiliation(s)
- Emma L Wilkinson
- Department of Molecular and Clinical Pharmacology, MRC Centre for Drug Safety Science, University of Liverpool, Liverpool, UK
| | - James E Sidaway
- Department of Molecular and Clinical Pharmacology, MRC Centre for Drug Safety Science, University of Liverpool, Liverpool, UK
| | - Michael J Cross
- Department of Molecular and Clinical Pharmacology, MRC Centre for Drug Safety Science, University of Liverpool, Liverpool, UK
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16
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Mathematical Modeling and Experimental Validation of Nanoemulsion-Based Drug Transport across Cellular Barriers. Pharm Res 2017; 34:1416-1427. [PMID: 28389708 DOI: 10.1007/s11095-017-2158-7] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2017] [Accepted: 04/03/2017] [Indexed: 12/17/2022]
Abstract
PURPOSE Nanoemulsions have shown potential in delivering drug across epithelial and endothelial cell barriers, which express efflux transporters. However, their transport mechanisms are not entirely understood. Our goal was to investigate the cellular permeability of nanoemulsion-encapsulated drugs and apply mathematical modeling to elucidate transport mechanisms and sensitive nanoemulsion attributes. METHODS Transport studies were performed in Caco-2 cells, using fish oil nanoemulsions and a model substrate, rhodamine-123. Permeability data was modeled using a semi-mechanistic approach, capturing the following cellular processes: endocytotic uptake of the nanoemulsion, release of rhodamine-123 from the nanoemulsion, efflux and passive permeability of rhodamine-123 in aqueous solution. RESULTS Nanoemulsions not only improved the permeability of rhodamine-123, but were also less sensitive to efflux transporters. The model captured bidirectional permeability results and identified sensitive processes, such as the release of the nanoemulsion-encapsulated drug and cellular uptake of the nanoemulsion. CONCLUSIONS Mathematical description of cellular processes, improved our understanding of transport mechanisms, such as nanoemulsions don't inhibit efflux to improve drug permeability. Instead, their endocytotic uptake, results in higher intracellular drug concentrations, thereby increasing the concentration gradient and transcellular permeability across biological barriers. Modeling results indicated optimizing nanoemulsion attributes like the droplet size and intracellular drug release rate, may further improve drug permeability.
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17
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Fusi E, Giromini C, Rebucci R, Pinotti L, Caprarulo V, Cheli F, Vitari F, Domeneghini C, Baldi A. Ochratoxin A cytotoxicity on Madin-Darby canine kidney cells in the presence of alpha-tocopherol: Effects on cell viability and tight junctions. J Anim Physiol Anim Nutr (Berl) 2017; 102:350-355. [DOI: 10.1111/jpn.12682] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 12/26/2016] [Indexed: 12/11/2022]
Affiliation(s)
- E. Fusi
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | - C. Giromini
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | - R. Rebucci
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | - L. Pinotti
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | - V. Caprarulo
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | - F. Cheli
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | | | - C. Domeneghini
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
| | - A. Baldi
- Department of Health, Animal Science and Food Safety; Università degli Studi di Milano; Milano Italy
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18
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Wilkinson EL, Sidaway JE, Cross MJ. Cardiotoxic drugs Herceptin and doxorubicin inhibit cardiac microvascular endothelial cell barrier formation resulting in increased drug permeability. Biol Open 2016; 5:1362-1370. [PMID: 27543060 PMCID: PMC5087671 DOI: 10.1242/bio.020362] [Citation(s) in RCA: 49] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Cardiotoxicity induced by anti-cancer therapeutics is a severe, and potentially fatal, adverse reaction of the heart in response to certain drugs. Current in vitro approaches to assess cardiotoxicity have focused on analysing cardiomyocytes. More recently it has become apparent that non-cardiomyocyte cells of the heart can potentially contribute to cardiotoxicity. Herceptin and doxorubicin are known to induce cardiotoxicity in the clinic. The effect of these drugs on the endothelial tight junction barrier was tested by analysing tight junction formation and zona occludens-1 (ZO-1) levels, revealing that Herceptin and doxorubicin are able to induce barrier perturbment and decrease barrier function in human cardiac microvascular endothelial cells (HCMECs) leading to increased permeability. Herceptin treatment had no effect on the tight junction barrier function in human dermal and human brain microvascular endothelial cells. HCMECs showed detectable levels of HER2 compared with the other endothelial cells suggesting that Herceptin binding to HER2 in these cells may interfere with tight junction formation. Our data suggests that doxorubicin and Herceptin can affect tight junction formation in the cardiac microvasculature leading to increased drug permeability and adverse effects on the cardiac myocytes. Summary: The anti-cancer drugs doxorubicin and Herceptin can disrupt tight junction formation in cardiac microvascular endothelial cells resulting in increased permeability which could potentially contribute to drug-induced cardiotoxicity.
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Affiliation(s)
- Emma L Wilkinson
- MRC Centre for Drug Safety Science, Department of Molecular and Clinical Pharmacology, Sherrington Building, Ashton Street, The University of Liverpool, Liverpool, L69 3GE, UK
| | - James E Sidaway
- MRC Centre for Drug Safety Science, Department of Molecular and Clinical Pharmacology, Sherrington Building, Ashton Street, The University of Liverpool, Liverpool, L69 3GE, UK Molecular Toxicology, AstraZeneca, Alderley Park, Cheshire, SK10 4TG, UK
| | - Michael J Cross
- MRC Centre for Drug Safety Science, Department of Molecular and Clinical Pharmacology, Sherrington Building, Ashton Street, The University of Liverpool, Liverpool, L69 3GE, UK
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19
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Liao Z, Yang Z, Piontek A, Eichner M, Krause G, Li L, Piontek J, Zhang J. Specific binding of a mutated fragment of Clostridium perfringens enterotoxin to endothelial claudin-5 and its modulation of cerebral vascular permeability. Neuroscience 2016; 327:53-63. [PMID: 27095710 DOI: 10.1016/j.neuroscience.2016.04.013] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2015] [Revised: 04/08/2016] [Accepted: 04/09/2016] [Indexed: 10/21/2022]
Abstract
The vertebrate blood-brain barrier (BBB) creates an obstacle for central nervous system-related drug delivery. Claudin-5 (Cldn5), expressed in large quantities in BBB, plays a vital role in restricting BBB permeability. The C-terminal domain of Clostridium perfringens enterotoxin (cCPE) has been verified as binding to a subset of claudins (Cldns). The Cldn5-binding cCPE194-319 variant cCPEY306W/S313H was applied in this study to investigate its ability to modulate the permeability of zebrafish larval BBB. In vitro results showed that cCPEY306W/S313H is able to bind specifically to Cldn5 in murine brain vascular endothelial (bEnd.3) cells, and is transported along with Cldn5 from the cell membrane to the cytoplasm, which in turn results in a reduction in transendothelial electrical resistance (TEER). Conversely, this effect can be reversed by removal of cCPEY306W/S313H. In an in vivo experiment, this study estimates the capability of cCPEY306W/S313H to modulate Cldn5 using a rhodamine B-Dextran dye diffusion assay in zebrafish larval BBB. The results show that cCPEY306W/S313H co-localized with Cldn5 in zebrafish cerebral vascular cells and modulated BBB permeability, resulting in dye leakage. Taken together, this study suggests that cCPEY306W/S313H has the capability - both in vitro and in vivo - to modulate BBB permeability temporarily by specific binding to Cldn5.
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Affiliation(s)
- Zhuangbin Liao
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Zhenguo Yang
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, China
| | - Anna Piontek
- Leibniz Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Miriam Eichner
- Clinical Physiology & Nutritional Medicine, Department of Gastroenterology, Rheumatology & Infectious Diseases, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Gerd Krause
- Leibniz Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Longxuan Li
- Department of Neurology, Gongli Hospital, Pudong New Area, Shanghai, China
| | - Joerg Piontek
- Clinical Physiology & Nutritional Medicine, Department of Gastroenterology, Rheumatology & Infectious Diseases, Charité Universitätsmedizin Berlin, Berlin, Germany
| | - Jingjing Zhang
- Affiliated Hospital of Guangdong Medical University, Zhanjiang, China.
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20
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Sosnik A, Imperiale JC, Vázquez-González B, Raskin MM, Muñoz-Muñoz F, Burillo G, Cedillo G, Bucio E. Mucoadhesive thermo-responsive chitosan- g -poly( N -isopropylacrylamide) polymeric micelles via a one-pot gamma-radiation-assisted pathway. Colloids Surf B Biointerfaces 2015; 136:900-7. [DOI: 10.1016/j.colsurfb.2015.10.036] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Revised: 10/20/2015] [Accepted: 10/26/2015] [Indexed: 02/08/2023]
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21
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Kubbinga M, Nguyen MA, Staubach P, Teerenstra S, Langguth P. The Influence of Chitosan on the Oral Bioavailability of Acyclovir--a Comparative Bioavailability Study in Humans. Pharm Res 2015; 32:2241-9. [PMID: 25609011 PMCID: PMC4452255 DOI: 10.1007/s11095-014-1613-y] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 12/26/2014] [Indexed: 12/18/2022]
Abstract
PURPOSE The effects of chitosan hydrochloride on the oral absorption of acyclovir in humans were studied to confirm the absorption enhancing effects reported for in vitro and rat studies, respectively. METHODS A controlled, open-label, randomized, 3-phase study was conducted in 12 healthy human volunteers. Zovirax 200 mg dispersible tablets co-administered with doses of 400 and 1000 mg chitosan HCl were compared with Zovirax only. RESULTS The expected increased absorption of acyclovir was not observed. On the contrary, mean area under the plasma concentration-time curve (AUC0-12 h) and maximal plasma concentration (Cmax) decreased following concomitant chitosan intake (1402 versus 1017 and 982.0 ng ∙ h/ml and 373 versus 208 and 235 ng/ml, respectively). In addition, Tmax increased significantly in presence of 1000 mg of chitosan from 1 to 2 h. CONCLUSIONS The results of this study in human volunteers did not confirm an absorption enhancing effect of chitosan. Reference values were comparable to literature data, whereas addition of chitosan resulted in significant opposite effects on Cmax, Tmax and AUC. Additional studies are needed to investigate the cause of the discrepancy. The observed variability and complex potential interactions may complicate the use of chitosan HCl in oral pharmaceutical formulations.
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Affiliation(s)
- Marlies Kubbinga
- Centre for Health Protection, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University Mainz, Staudingerweg 5, 55128 Mainz, Germany
- Medicines Evaluation Board, Utrecht, The Netherlands
| | - Mai Anh Nguyen
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University Mainz, Staudingerweg 5, 55128 Mainz, Germany
| | - Petra Staubach
- Department of Dermatology, Clinical Research Center, University Medical Center, Mainz, Germany
| | | | - Peter Langguth
- Institute of Pharmacy and Biochemistry, Johannes Gutenberg University Mainz, Staudingerweg 5, 55128 Mainz, Germany
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22
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Zhang J, Ni C, Yang Z, Piontek A, Chen H, Wang S, Fan Y, Qin Z, Piontek J. Specific binding of Clostridium perfringens enterotoxin fragment to Claudin-b and modulation of zebrafish epidermal barrier. Exp Dermatol 2015; 24:605-10. [PMID: 25869230 DOI: 10.1111/exd.12728] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 04/09/2015] [Indexed: 12/24/2022]
Abstract
Claudins (Cldn) are the major components of tight junctions (TJs) sealing the paracellular cleft in tissue barriers of various organs. Zebrafish Cldnb, the homolog of mammalian Cldn4, is expressed at epithelial cell-cell contacts and is important for regulating epidermal permeability. The bacterial toxin Clostridium perfringens enterotoxin (CPE) has been shown to bind to a subset of mammalian Cldns. In this study, we used the Cldn-binding C-terminal domain of CPE (194-319 amino acids, cCPE 194-319 ) to investigate its functional role in modulating zebrafish larval epidermal barriers. In vitro analyses show that cCPE 194-319 removed Cldn4 from epithelial cells and disrupted the monolayer tightness, which could be rescued by the removal of cCPE 194-319. Incubation of zebrafish larvae with cCPE 194-319 removed Cldnb specifically from the epidermal cell membrane. Dye diffusion analysis with 4-kDa fluorescent dextran indicated that the permeability of the epidermal barrier increased due to cCPE 194-319 incubation. Electron microscopic investigation revealed reversible loss of TJ integrity by Cldnb removal. Collectively, these results suggest that cCPE 194-319 could be used as a Cldnb modulator to transiently open the epidermal barrier in zebrafish. In addition, zebrafish might be used as an in vivo system to investigate the capability of cCPE to enhance drug delivery across tissue barriers.
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Affiliation(s)
- Jingjing Zhang
- Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong, China.,Leibniz Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Chen Ni
- The First Affiliated Hospital of Zhengzhou University, No.1 Jianshe East Road, Zhengzhou, 450052, Henan Province, China
| | - Zhenguo Yang
- Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong, China
| | - Anna Piontek
- Leibniz Institut für Molekulare Pharmakologie, Berlin, Germany
| | - Huapu Chen
- Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong, China
| | - Sijie Wang
- Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong, China
| | - Yiming Fan
- Affiliated Hospital of Guangdong Medical College, Zhanjiang, Guangdong, China
| | - Zhihai Qin
- Key Laboratory of Protein and Peptide Pharmaceuticals, Chinese Academy of Sciences-University of Tokyo Joint Laboratory of Structural Virology and Immunology, Institute of Biophysics, Chinese Academy of Sciences, Beijing, China
| | - Joerg Piontek
- Institute of Clinical Physiology, Charité -Universitätsmedizin Berlin, Berlin, Germany
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23
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Wade JS, Desai TA. Planar microdevices enhance transport of large molecular weight molecules across retinal pigment epithelial cells. Biomed Microdevices 2014; 16:629-38. [PMID: 24789225 PMCID: PMC4082762 DOI: 10.1007/s10544-014-9865-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
Abstract
Large molecular weight drug delivery to the posterior eye is challenging due to cellular barriers that hinder drug transport. Understanding how to enhance transport across the retinal barrier is important for the design of new drug delivery systems. A novel mechanism to enhance drug transport is the use of geometric properties, which has not been extensively explored in the retina. Planar SU-8/Poly(ethyleneglycol)dimethacrylate microdevices were constructed using photolithography to deliver FITC dextran across an in vitro retinal model. The model consists of retinal pigment epithelial (RPE) cells grown to confluence on transwell inserts, which provides an environment to investigate the influence of geometry on paracellular and transcellular delivery of encapsulated large molecules. Planar microdevices enhanced transport of large molecular weight dextrans across different models of RPE in a size dependent fashion. Increased drug permeation across the RPE was observed with the addition of microdevices as compared to a traditional bolus of FITC dextran. This phenomena was initiated by a non-toxic interaction between the microdevices and the retinal tight junction proteins. Suggesting that increased drug transport occurs via a paracellular pathway. These experiments provide evidence to support the future use of planar unidirectional microdevices for delivery of biologics in ocular applications.
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Affiliation(s)
- Jennifer S. Wade
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, USA
| | - Tejal A. Desai
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, California 94158, USA
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24
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Washiyama M, Koizumi N, Fujii M, Kondoh M, Yagi K, Watanabe Y. Percolation analysis in electrical conductivity of Madin-Darby canine kidney and Caco-2 cells by permeation-enhancing agents. Biol Pharm Bull 2013; 36:384-9. [PMID: 23449326 DOI: 10.1248/bpb.b12-00786] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The control of permeability through the paracellular route has been paid great attention to for enhanced bioavailability of macromolecular and hydrophilic drugs. The paracellular permeability is controlled by tight junctions (TJ), and claudins are the major constituents of TJ. Despite numerous studies on TJ modulation, the dynamics is not well understood, although it could be crucial for clinical applications. Here, we studied the time (t) course of electrical conductivity (Σ) in a monolayer of Madin-Darby canine kidney (MDCK) and Caco-2 cells upon treatment with modulators, the C-terminus fragments of Clostridium perfringens enterotoxin (C-CPE) and sodium caprate (C10). For C-CPE treatment, Σ remains approximately constant, then starts increasing at t=tc (percolation threshold). For C10, on the other hand, Σ increases to 1.6-2.0 fold of the initial value, stays constant, and then starts increasing again for both MDCK and Caco-2 cells at t=tc. We find that this behavior can be explained within a framework of percolation, where Σ shows a logarithmic dependence on t-tc with the power of μ; μ denotes the critical exponent. We obtain μ=1.1-1.2 regardless of cell type or modulator. Notably, μ depends only on the dimensionality (d) of the system, and these values correspond to those for d=2. Percolation is thus the operative mechanism for the increase in Σ through TJ modulation. The findings provide fundamental knowledge, not only on controlled drug delivery, but also on bio-nanotechnologies including the fabrication of biological devices.
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Affiliation(s)
- Makiko Washiyama
- Department of Pharmaceutics and Biopharmaceutics, Showa Pharmaceutical University, 3–3165 Higashitamagawagakuen, Machida, Tokyo 194–8543, Japan
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25
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Lemmer HJR, Hamman JH. Paracellular drug absorption enhancement through tight junction modulation. Expert Opin Drug Deliv 2012; 10:103-14. [DOI: 10.1517/17425247.2013.745509] [Citation(s) in RCA: 73] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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26
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Rodrigues S, Dionísio M, López CR, Grenha A. Biocompatibility of chitosan carriers with application in drug delivery. J Funct Biomater 2012; 3:615-41. [PMID: 24955636 PMCID: PMC4030999 DOI: 10.3390/jfb3030615] [Citation(s) in RCA: 201] [Impact Index Per Article: 16.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2012] [Revised: 08/03/2012] [Accepted: 08/21/2012] [Indexed: 01/30/2023] Open
Abstract
Chitosan is one of the most used polysaccharides in the design of drug delivery strategies for administration of either biomacromolecules or low molecular weight drugs. For these purposes, it is frequently used as matrix forming material in both nano and micron-sized particles. In addition to its interesting physicochemical and biopharmaceutical properties, which include high mucoadhesion and a great capacity to produce drug delivery systems, ensuring the biocompatibility of the drug delivery vehicles is a highly relevant issue. Nevertheless, this subject is not addressed as frequently as desired and even though the application of chitosan carriers has been widely explored, the demonstration of systems biocompatibility is still in its infancy. In this review, addressing the biocompatibility of chitosan carriers with application in drug delivery is discussed and the methods used in vitro and in vivo, exploring the effect of different variables, are described. We further provide a discussion on the pros and cons of used methodologies, as well as on the difficulties arising from the absence of standardization of procedures.
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Affiliation(s)
- Susana Rodrigues
- Centre for Molecular and Structural Biomedicine (CBME), Institute for Biotechnology and Bioengineering (IBB), Faculty of Sciences and Technology, University of Algarve, Campus de Gambelas, Faro 8005-139, Portugal.
| | - Marita Dionísio
- Centre for Molecular and Structural Biomedicine (CBME), Institute for Biotechnology and Bioengineering (IBB), Faculty of Sciences and Technology, University of Algarve, Campus de Gambelas, Faro 8005-139, Portugal.
| | - Carmen Remuñán López
- Department of Pharmacy and Pharmaceutical Technology, Faculty of Pharmacy, University of Santiago de Compostela, Campus Vida, Santiago de Compostela 15782, Spain.
| | - Ana Grenha
- Centre for Molecular and Structural Biomedicine (CBME), Institute for Biotechnology and Bioengineering (IBB), Faculty of Sciences and Technology, University of Algarve, Campus de Gambelas, Faro 8005-139, Portugal.
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27
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Effects of atelocollagen formulation containing oligonucleotide on endothelial permeability. JOURNAL OF DRUG DELIVERY 2012; 2012:245835. [PMID: 22506120 PMCID: PMC3312293 DOI: 10.1155/2012/245835] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/29/2011] [Revised: 12/11/2011] [Accepted: 12/12/2011] [Indexed: 01/15/2023]
Abstract
Atelocollagen is a major animal protein that is used as a highly biocompatible biomaterial. To date, atelocollagen has been used as an effective drug delivery technology to sustain the release of antitumor proteins and to enhance the antitumor activity of oligonucleotides in in vivo models. However, the biological effects of this technology are not fully understood. In the present study, we investigated the effects of atelocollagen on endothelial paracellular barrier function. An atelocollagen formulation containing oligonucleotides specifically increased the permeability of two types of endothelial cells, and the change was dependent on the molecular size, structure of the oligonucleotides used and the concentrations of the oligonucleotide and atelocollagen in the formulation. An immunohistochemical examination revealed that the formulation had effects on the cellular skeleton and intercellular structure although it did not affect the expression of adherens junction or tight junction proteins. These changes were induced through p38 MAP kinase signaling. It is important to elucidate the biological functions of atelocollagen in order to be able to exploit its drug delivery properties.
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Carr KE, Smyth SH, McCullough MT, Morris JF, Moyes SM. Morphological aspects of interactions between microparticles and mammalian cells: intestinal uptake and onward movement. ACTA ACUST UNITED AC 2012; 46:185-252. [DOI: 10.1016/j.proghi.2011.11.001] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
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29
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Lectin-functionalized carboxymethylated kappa-carrageenan microparticles for oral insulin delivery. Carbohydr Polym 2011. [DOI: 10.1016/j.carbpol.2011.04.070] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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Selg E, Acevedo F, Nybom R, Blomgren B, Ryrfeldt Å, Gerde P. Delivering Horseradish Peroxidase as a Respirable Powder to the Isolated, Perfused, and Ventilated Lung of the Rat: The Pulmonary Disposition of an Inhaled Model Biopharmaceutical. J Aerosol Med Pulm Drug Deliv 2010; 23:273-84. [DOI: 10.1089/jamp.2009.0790] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Ewa Selg
- Inhalation Sciences Sweden AB, Stockholm, Sweden
| | | | - Rolf Nybom
- Department of Neuroscience, Karolinska Institutet, Stockholm, Sweden
| | - Bo Blomgren
- Safety Assessment, AstraZeneca R&D, Södertälje, Sweden
| | - Åke Ryrfeldt
- Division of Physiology, The National Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Per Gerde
- Inhalation Sciences Sweden AB, Stockholm, Sweden
- Division of Physiology, The National Institute of Environmental Medicine, Karolinska Institutet, Stockholm, Sweden
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Impact of amino acid replacements on in vitro permeation enhancement and cytotoxicity of the intestinal absorption promoter, melittin. Int J Pharm 2010; 387:154-60. [DOI: 10.1016/j.ijpharm.2009.12.022] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2009] [Revised: 12/08/2009] [Accepted: 12/09/2009] [Indexed: 10/20/2022]
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Tight junctions: a barrier to the initiation and progression of breast cancer? J Biomed Biotechnol 2009; 2010:460607. [PMID: 19920867 PMCID: PMC2777242 DOI: 10.1155/2010/460607] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Accepted: 08/27/2009] [Indexed: 12/11/2022] Open
Abstract
Breast cancer is a complex and heterogeneous disease that arises from epithelial cells lining the breast ducts and lobules. Correct adhesion between adjacent epithelial cells is important in determining the normal structure and function of epithelial tissues, and there is accumulating evidence that dysregulated cell-cell adhesion is associated with many cancers. This review will focus on one cell-cell adhesion complex, the tight junction (TJ), and summarize recent evidence that TJs may participate in breast cancer development or progression. We will first outline the protein composition of TJs and discuss the functions of the TJ complex. Secondly we will examine how alterations in these functions might facilitate breast cancer initiation or progression; by focussing on the regulatory influence of TJs on cell polarity, cell fate and cell migration. Finally we will outline how pharmacological targeting of TJ proteins may be useful in limiting breast cancer progression. Overall we hope to illustrate that the relationship between TJ alterations and breast cancer is a complex one; but that this area offers promise in uncovering fundamental mechanisms linked to breast cancer progression.
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Fiandra L, Casartelli M, Cermenati G, Burlini N, Giordana B. The intestinal barrier in lepidopteran larvae: permeability of the peritrophic membrane and of the midgut epithelium to two biologically active peptides. JOURNAL OF INSECT PHYSIOLOGY 2009; 55:10-18. [PMID: 18948109 DOI: 10.1016/j.jinsphys.2008.09.005] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/15/2008] [Revised: 09/12/2008] [Accepted: 09/16/2008] [Indexed: 05/27/2023]
Abstract
Endogenous peptide regulators of insect physiology and development are presently being considered as potential biopesticides, but their efficacy by oral delivery cannot be easily anticipated because of the limited information on how the insect gut barrier handles these kind of molecules. We investigated, in Bombyx mori larvae, the permeability properties of the two components of the intestinal barrier, the peritrophic membrane (PM) and the midgut epithelium, separately isolated and perfused in conventional Ussing chambers. The PM discriminated compounds of different dimensions but was easily crossed by two small peptides recently proposed as bioinsecticides, the neuropeptide proctolin and Aedes aegypti Trypsin Modulating Oostatic Factor (Aea-TMOF), although their flux values indicated that the permeability was highly affected by their steric conformation. To date, there is very little functional data available on how peptides cross the insect intestinal epithelium, but it has been speculated that peptides could reach the haemocoel through the paracellular pathway. We characterized the permeability properties of this route to a number of organic molecules, showing that B. mori septate junction was highly selective to both the dimension and the charge of the permeant compound. Confocal images of whole-mount midguts incubated with rhodamine(rh)-proctolin or fluorescein isothiocyanate (FITC)-Aea-TMOF added to the mucosal side of the epithelium, revealed that rh-proctolin did not enter the cell and crossed the midgut only by the paracellular pathway, while FITC-Aea-TMOF did cross the cell apical membrane, permeating also through the transcellular route.
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Affiliation(s)
- L Fiandra
- Department of Biology, University of Milan, Italy.
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Jayagopal A, Sussman EM, Shastri VP. Functionalized solid lipid nanoparticles for transendothelial delivery. IEEE Trans Nanobioscience 2008; 7:28-34. [PMID: 18334453 DOI: 10.1109/tnb.2008.2000147] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The objectives of this study were to synthesize and characterize functionalized solid lipid nanoparticles (fSLN) to investigate their interaction with endothelial cell monolayers and to evaluate their transendothelial transport capabilities. fSLN bearing tetramethylrhodamine-isothiocyanate-labeled bovine serum albumin (TRITC-BSA) and Coumarin 6 were prepared using a single-step phase-inversion process that afforded concurrent surface modification with a variety of macromolecules such as polystyrene sulfonate (PSS), poly-L-lysine (PLL), heparin (Hep), polyacrylic acid (PAA), polyvinyl alcohol, and polyethylene glycol (PEG). TRITC-BSA/Coumarin 6 encapsulated in fSLN with composite surface functionality (PSS-PLL and PSS-PLL-Hep) were also investigated. Size and surface charge of fSLN were analyzed using dynamic light scattering and transmission electron microscopy. Transport across bovine aortic endothelial cell (BAEC) monolayers was assessed spectrophotometrically using a transwell assay, and fSLN localization at the level of the cell and permeable support was analyzed using fluorescence microscopy. fSLN with tunable size and surface functionality were successfully produced, and had significant effects on cell localization and transport. Specifically, fSLN with PSS-PLL-Hep composite surface functionalization was capable of translocating 53.2 +/- 8.7 mug of TRITC-BSA within 4 h, with fSLN-PEG, fSLN-PAA, and fSLN-PSS exhibiting near-complete apical, paracellular, and cytosolic localization, respectively. Coumarin 6 was released by fSLN as indicated by dye labeling of BAEC membranes. We have developed a rapid process for the production of fSLN bearing low- and high-molecular-weight payloads of varying physicochemical properties. These findings have impications for drug delivery and bioimaging applications, since due to tunable surface chemistry, fSLN internalization and/or translocation across intact endothelial cell monolayers is possible.
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Affiliation(s)
- A Jayagopal
- Department of Biomedical Engineering, Vanderbilt University, Nashville, TN 37240, USA. ash
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Di Colo G, Zambito Y, Zaino C. Polymeric Enhancers of Mucosal Epithelia Permeability: Synthesis, Transepithelial Penetration-Enhancing Properties, Mechanism of Action, Safety Issues. J Pharm Sci 2008; 97:1652-80. [PMID: 17828745 DOI: 10.1002/jps.21043] [Citation(s) in RCA: 82] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Transmucosal drug administration across nasal, buccal, and ocular mucosae is noninvasive, eliminates hepatic first-pass metabolism and harsh environmental conditions, allows rapid onset, and further, mucosal surfaces are readily accessible. Generally, however, hydrophilic drugs, such as peptides and proteins, are poorly permeable across the epithelium, which results in insufficient bioavailability. Therefore, reversible modifications of epithelial barrier structure by permeation enhancers are required. Low molecular weight enhancers generally have physicochemical characteristics favoring their own absorption, whereas polymeric enhancers are not absorbed, and this minimizes the risk of systemic toxicity. The above considerations have warranted the present survey of the studies on polymeric transmucosal penetration-enhancers that have appeared in the literature during the last decade. Studies on intestinal permeation enhancers are also reviewed as they give information on the mechanism of action and safety of polymers. The synthesis and characterization of polymers, their effectiveness in enhancing the absorption of different drugs across different epithelium types, their mechanism of action and structure-efficacy relationship, and the relevant safety issues are reviewed. The active polymers are classified into: polycations (chitosan and its quaternary ammonium derivatives, poly-L-arginine (poly-L-Arg), aminated gelatin), polyanions (N-carboxymethyl chitosan, poly(acrylic acid)), and thiolated polymers (carboxymethyl cellulose-cysteine, polycarbophil (PCP)-cysteine, chitosan-thiobutylamidine, chitosan-thioglycolic acid, chitosan-glutathione conjugates).
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Affiliation(s)
- Giacomo Di Colo
- Department of Bioorganic Chemistry and Biopharmaceutics, University of Pisa, Via Bonanno 33, 56126 Pisa, Italy.
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Cereijido M, Contreras RG, Shoshani L, Flores-Benitez D, Larre I. Tight junction and polarity interaction in the transporting epithelial phenotype. BIOCHIMICA ET BIOPHYSICA ACTA-BIOMEMBRANES 2007; 1778:770-93. [PMID: 18028872 DOI: 10.1016/j.bbamem.2007.09.001] [Citation(s) in RCA: 108] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/30/2007] [Revised: 08/28/2007] [Accepted: 09/03/2007] [Indexed: 12/21/2022]
Abstract
Development of tight junctions and cell polarity in epithelial cells requires a complex cellular machinery to execute an internal program in response to ambient cues. Tight junctions, a product of this machinery, can act as gates of the paracellular pathway, fences that keep the identity of plasma membrane domains, bridges that communicate neighboring cells. The polarization internal program and machinery are conserved in yeast, worms, flies and mammals, and in cell types as different as epithelia, neurons and lymphocytes. Polarization and tight junctions are dynamic features that change during development, in response to physiological and pharmacological challenges and in pathological situations like infection.
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Affiliation(s)
- Marcelino Cereijido
- Department of Physiology, Biophysics and Neurosciences, CINVESTAV, AP 14-740, México D.F. 07000, México.
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Moyes SM, Smyth SH, Shipman A, Long S, Morris JF, Carr KE. Parameters influencing intestinal epithelial permeability and microparticle uptake in vitro. Int J Pharm 2007; 337:133-41. [PMID: 17306478 DOI: 10.1016/j.ijpharm.2006.12.036] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/07/2006] [Revised: 12/21/2006] [Accepted: 12/23/2006] [Indexed: 10/23/2022]
Abstract
The hypothesis that, in vivo in situ, villous uptake of 2 microm latex microparticles involves changes at enterocyte tight junctions (TJs) was tested using Caco-2 cells on porous membranes. Epithelial permeability was measured by transepithelial resistance (TER) and particle numbers in surface, intraepithelial and sub-epithelial compartments by microscopy. Apical particle or medium addition initially closed TJs, but this was subsequently reversed in particle-treated groups. Peristaltic onward movement of a bolus was simulated by removing apical particles after an exposure period and leaving the remaining particles to interact with the epithelium: this produced marked TJ loosening during the interaction period. For particle exposure groups, the early similarity with particle numbers in vivo taken up in young adult rats became less marked with time, although bolus removal counteracted this tendency. The TJ response to vasoactive intestinal polypeptide (VIP) was time-dependent. Adsorbed and intraepithelial particle numbers increased with particle exposure time; epithelial-associated microparticle aggregation varied with treatment and submembranous particles were seen in all groups. Correlation between TER changes and particle numbers suggests TJ loosening may be important in microparticle uptake. This Caco-2 model gives epithelial particle numbers that approximate well to published figures for microparticle uptake in vivo and allows effective microenvironmental manipulation.
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Affiliation(s)
- S M Moyes
- Department of Physiology, Anatomy and Genetics, Le Gros Clark Building, University of Oxford, South Parks Road, Oxford OX1 3QX, United Kingdom.
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Flores-Benítez D, Ruiz-Cabrera A, Flores-Maldonado C, Shoshani L, Cereijido M, Contreras RG. Control of tight junctional sealing: role of epidermal growth factor. Am J Physiol Renal Physiol 2007; 292:F828-36. [PMID: 17077385 DOI: 10.1152/ajprenal.00369.2006] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2023] Open
Abstract
Epithelia can adjust the permeability of their paracellular permeation route to physiological requirements, pathological conditions, and pharmacological challenges. This is reflected by a transepithelial electrical resistance (TER) ranging from a few tenth to several thousands Ω·cm2, depending on the degree of sealing of the tight junction (TJ). The present work is part of an effort to understand the causes and mechanisms underlying these adaptations. We observed that an extract of human urine (hDLU) increases TER in a concentration- and time-dependent manner and is more effective when added from the basolateral side of cultured monolayers of Madin-Darby canine kidney cells than from the apical one. We found that its main TER-increasing component is epidermal growth factor (hEGF), as depletion of this peptide with specific antibodies, or inhibition of its receptor with PD153035, abolishes its effect. Since the permeability of the TJ depends on the expression of several species of membrane proteins, chiefly claudins, we explored whether hDLU can affect five members of the claudin family, the three known members of the ZO family, and occludin. EGF present in hDLU decreases the content of claudins-1 and -2 as well as delocalizes them from the TJ and increases the content of claudin-4. As expected from the fact that the degree of sealing of the TJ must be a physiologically regulated parameter, besides of hEGF, we also found that hDLU appears to contain also other components that decrease TER, claudin-4 and -7, and that seem to act with different kinetics than the TER-increasing ones.
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Affiliation(s)
- D Flores-Benítez
- Department of Physiology, Universidad Nacional Autónoma de México, México
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