1
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Chen P, Demirji J, Ivleva VB, Horwitz J, Schwartz R, Arnold F. The transient expression of CHIKV VLP in large stirred tank bioreactors. Cytotechnology 2019; 71:1079-1093. [PMID: 31560090 DOI: 10.1007/s10616-019-00346-x] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2019] [Accepted: 09/19/2019] [Indexed: 01/06/2023] Open
Abstract
Transient gene expression (TGE) bioprocesses have been difficult to scale up in large stirred tank bioreactors with volumes of more than 1.5 L. Low production levels are often observed, but the causes have not been investigated (Gutierrez-Granados et al. in Crit Rev Biotechnol 38:918-940, 2018). Chikungunya Virus-like particle (VLP), expressed by DNA-PEI transient transfection, is a representative case study for these difficulties. Clinical materials were produced in shake flasks, but the process suffered when transferred to large stirred tank bioreactors. The resulting process was not operationally friendly nor cost effective. In this study, a systematic approach was used to investigate the root causes of the poor scale up performance. The transfection conditions were first screened in ambr® 15 high throughput mini bioreactors then examined in 3 L stirred-tank systems. The studies found that production level was negatively correlated with inoculum cell growth status (P < 0.05). The pH range, DNA and PEI levels, order of the reagent addition, and gas-sparging systems were also studied and found to affect process performance. Further hydromechanical characterizations (Re, energy dissipation rates, and P/V, etc.) of shake flasks, ambr® 15, and 3-L stirred tank systems were performed. Overall, the study discovered that the shear stress (caused by a microsparger) and PEI toxicity together were the root causes of scale-up failure. Once the microsparger was replaced by a macrosparger, the scale-up was successful.
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Affiliation(s)
- Peifeng Chen
- Vaccine Production Program, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 9 West Watkins Mill Rd, Gaithersburg, MD, 20878, USA.
| | - Jacob Demirji
- Vaccine Production Program, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 9 West Watkins Mill Rd, Gaithersburg, MD, 20878, USA
| | - Vera B Ivleva
- Vaccine Production Program, Vaccine Research Center, National Institute of Allergy and Infectious Diseases, National Institutes of Health, 9 West Watkins Mill Rd, Gaithersburg, MD, 20878, USA
| | - Joe Horwitz
- Amicus Therapeutics, 1 Cedarbrook Dr, Cranbury, NJ, 08512, USA
| | | | - Frank Arnold
- Tunnell Consulting, 900 E. 8th Ave, King of Prussia, PA, 19406, USA
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2
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Ex vivo pretreatment of human vessels with siRNA nanoparticles provides protein silencing in endothelial cells. Nat Commun 2017; 8:191. [PMID: 28775323 PMCID: PMC5543113 DOI: 10.1038/s41467-017-00297-x] [Citation(s) in RCA: 71] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2016] [Accepted: 06/19/2017] [Indexed: 12/31/2022] Open
Abstract
Human endothelial cells are initiators and targets of the rejection response. Pre-operative modification of endothelial cells by small interfering RNA transfection could shape the nature of the host response post-transplantation. Ablation of endothelial cell class II major histocompatibility complex molecules by small interfering RNA targeting of class II transactivator can reduce the capacity of human endothelial cells to recruit and activate alloreactive T cells. Here, we report the development of small interfering RNA-releasing poly(amine-co-ester) nanoparticles, distinguished by their high content of a hydrophobic lactone. We show that a single transfection of small interfering RNA targeting class II transactivator attenuates major histocompatibility complex class II expression on endothelial cells for at least 4 to 6 weeks after transplantation into immunodeficient mouse hosts. Furthermore, silencing of major histocompatibility complex class II reduces allogeneic T-cell responses in vitro and in vivo. These data suggest that poly(amine-co-ester) nanoparticles, potentially administered during ex vivo normothermic machine perfusion of human organs, could be used to modify endothelial cells with a sustained effect after transplantation. The use of gene silencing techniques in the treatment of post-transplantation host rejection is not long lasting and can have systemic effects. Here, the authors utilize a nanocarrier for siRNA for treatment of arteries ex vivo prior to implantation subsequently attenuating immune reaction in vivo.
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3
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Englert C, Trützschler AK, Raasch M, Bus T, Borchers P, Mosig AS, Traeger A, Schubert US. Crossing the blood-brain barrier: Glutathione-conjugated poly(ethylene imine) for gene delivery. J Control Release 2016; 241:1-14. [DOI: 10.1016/j.jconrel.2016.08.039] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 08/24/2016] [Accepted: 08/28/2016] [Indexed: 01/27/2023]
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4
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Rawat J, Gadgil M. Shear stress increases cytotoxicity and reduces transfection efficiency of liposomal gene delivery to CHO-S cells. Cytotechnology 2016; 68:2529-2538. [PMID: 27130551 DOI: 10.1007/s10616-016-9974-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/04/2016] [Accepted: 04/19/2016] [Indexed: 11/26/2022] Open
Abstract
Animal cells in suspension experience shear stress in different situations such as in vivo due to hemodynamics, or in vitro due to agitation in large-scale bioreactors. Shear stress is known to affect cell physiology, including binding and uptake of extracellular cargo. In adherent cells the effects of exposure to shear stress on particle binding kinetics and uptake have been studied. There are however no reports on the effect of shear stress on extracellular cargo delivery to suspension cells. In this study, we have evaluated the effect of shear stress on transfection of CHO-S cells using Lipofectamine 2000 in a simple flow apparatus. Our results show decreased cell growth and transfection efficiency upon lipoplex assisted transfection of CHO-S while being subjected to shear stress. This effect is not seen to the same extent when cells are exposed to shear stress in absence of the lipoplex complex and subsequently transfected, or if the lipoplex is subjected to shear stress and subsequently used to transfect the cells. It is also not seen to the same extent when cells are exposed to shear stress in presence of liposome alone, suggesting that the observed effect is dependent on interaction of the lipoplex with cells in the presence of shear stress. These results suggest that studies involving liposomal DNA delivery in presence of shear stress such as large scale transient protein expression should account for the effect of shear during lipoplex assisted DNA delivery.
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Affiliation(s)
- Jyoti Rawat
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411008, India
| | - Mugdha Gadgil
- Chemical Engineering and Process Development Division, CSIR-National Chemical Laboratory, Pune, 411008, India.
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5
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Kang T, Park C, Choi JS, Cui JH, Lee BJ. Effects of shear stress on the cellular distribution of polystyrene nanoparticles in a biomimetic microfluidic system. J Drug Deliv Sci Technol 2016. [DOI: 10.1016/j.jddst.2015.12.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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6
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Broda E, Mickler FM, Lächelt U, Morys S, Wagner E, Bräuchle C. Assessing potential peptide targeting ligands by quantification of cellular adhesion of model nanoparticles under flow conditions. J Control Release 2015; 213:79-85. [PMID: 26134072 DOI: 10.1016/j.jconrel.2015.06.030] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Revised: 06/18/2015] [Accepted: 06/22/2015] [Indexed: 10/23/2022]
Abstract
Sophisticated drug delivery systems are coated with targeting ligands to improve the specific adhesion to surface receptors on diseased cells. In our study, we developed a method with which we assessed the potential of peptide ligands to specifically bind to receptor overexpressing target cells. Therefore, a microfluidic setup was used where the cellular adhesion of nanoparticles with ligand and of control nanoparticles was observed in parallel under the same experimental conditions. The effect of the ligand on cellular binding was quantified by counting the number of adhered nanoparticles with ligand and differently labeled control nanoparticles on single cells after incubation under flow conditions. To provide easy-to-synthesize, stable and reproducible nanoparticles which mimic the surface characteristics of drug delivery systems and meet the requirements for quantitative analysis, latex beads based on amine-modified polystyrene were used as model nanoparticles. Two short peptides were tested to serve as targeting ligand on the beads by increasing the specific binding to HuH7 cells. The c-Met binding peptide cMBP2 was used for hepatocyte growth factor receptor (c-Met) targeting and the peptide B6 for transferrin receptor (TfR) targeting. The impact of the targeting peptide on binding was investigated by comparing the beads with ligand to different internal control beads: 1) without ligand and tailored surface charge (electrostatic control) and 2) with scrambled peptide and similar surface charge, but a different amino acid sequence (specificity control). Our results demonstrate that the method is very useful to select suitable targeting ligands for specific nanoparticle binding to receptor overexpressing tumor cells. We show that the cMBP2 ligand specifically enhances nanoparticle adhesion to target cells, whereas the B6 peptide mediates binding to tumor cells mainly by nonspecific interactions. All together, we suggest that cMBP2 is a suitable choice for specific receptor targeting whereas the peptide B6 should not be considered as specific targeting moiety.
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Affiliation(s)
- Ellen Broda
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, D-81377 München, Germany
| | - Frauke Martina Mickler
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, D-81377 München, Germany
| | - Ulrich Lächelt
- Department of Pharmacy and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, D-81377 München, Germany
| | - Stephan Morys
- Department of Pharmacy and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, D-81377 München, Germany
| | - Ernst Wagner
- Department of Pharmacy and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, D-81377 München, Germany
| | - Christoph Bräuchle
- Department of Chemistry and Center for NanoScience (CeNS), Ludwig-Maximilians-Universität München, Butenandtstr. 5-13, D-81377 München, Germany.
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7
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Fejerskov B, Jensen NBS, Teo BM, Städler B, Zelikin AN. Biocatalytic polymer coatings: on-demand drug synthesis and localized therapeutic effect under dynamic cell culture conditions. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2014; 10:1314-1324. [PMID: 24376172 DOI: 10.1002/smll.201303101] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/25/2013] [Revised: 11/05/2013] [Indexed: 06/03/2023]
Abstract
Biocatalytic surface coatings are prepared herein for localized synthesis of drugs and their on-demand, site-specific delivery to adhering cells. This novel approach is based on the incorporation of an enzyme into multilayered polymer coatings to accomplish enzyme-prodrug therapy (EPT). The build-up of enzyme-containing multilayered coatings is characterized and correlations are drawn between the multilayer film assembly conditions and the enzymatic activity of the resulting coatings. Therapeutic effect elicited by the substrate mediated EPT (SMEPT) strategy is investigated using a prodrug for an anticancer agent, SN-38. The performance of biocatalytic coatings under flow conditions is investigated and it is demonstrated that EPT allows synthesizing the drugs on-demand, at the time desired and in a controllable amount to suit particular applications. Finally, using cells cultured in sequentially connected flow chambers, it is demonstrated that SMEPT affords a site-specific drug delivery, that is, exerts a higher therapeutic effect in cells adhering directly to the biocatalytic coatings than in the cells cultured "downstream". Taken together, these data illustrate biomedical opportunities made possible by engineering tools of EPT into multilayered polymer coatings and present a novel, highly versatile tool for surface mediated drug delivery.
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Affiliation(s)
- Betina Fejerskov
- Department of Chemistry, Aarhus University, Aarhus, 8000, Denmark
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8
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Lima WC, Vinet A, Pieters J, Cosson P. Role of PKD2 in rheotaxis in Dictyostelium. PLoS One 2014; 9:e88682. [PMID: 24520414 PMCID: PMC3919814 DOI: 10.1371/journal.pone.0088682] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2013] [Accepted: 01/08/2014] [Indexed: 11/18/2022] Open
Abstract
The sensing of mechanical forces modulates several cellular responses as adhesion, migration and differentiation. Transient elevations of calcium concentration play a key role in the activation of cells following mechanical stress, but it is still unclear how eukaryotic cells convert a mechanical signal into an ion flux. In this study, we used the model organism Dictyostelium discoideum to assess systematically the role of individual calcium channels in mechanosensing. Our results indicate that PKD2 is the major player in the cell response to rheotaxis (i.e., shear-flow induced mechanical motility), while other putative calcium channels play at most minor roles. Mutant pkd2 KO cells lose the ability to orient relative to a shear flow, whereas their ability to move towards a chemoattractant is unaffected. PKD2 is also important for calcium-induced lysosome exocytosis: WT cells show a transient, 2-fold increase in lysosome secretion upon sudden exposure to high levels of extracellular calcium, but pkd2 KO cells do not. In Dictyostelium, PKD2 is specifically localized at the plasma membrane, where it may generate calcium influxes in response to mechanical stress or extracellular calcium changes.
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Affiliation(s)
- Wanessa C. Lima
- Department of Cell Physiology and Metabolism, Centre Médical Universitaire, University of Geneva, Geneva, Switzerland
- * E-mail:
| | - Adrien Vinet
- Biozentrum, University of Basel, Basel, Switzerland
| | - Jean Pieters
- Biozentrum, University of Basel, Basel, Switzerland
| | - Pierre Cosson
- Department of Cell Physiology and Metabolism, Centre Médical Universitaire, University of Geneva, Geneva, Switzerland
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9
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Teo BM, van der Westen R, Hosta-Rigau L, Städler B. Cell response to PEGylated poly(dopamine) coated liposomes considering shear stress. Biochim Biophys Acta Gen Subj 2013; 1830:4838-47. [DOI: 10.1016/j.bbagen.2013.06.022] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2013] [Revised: 06/06/2013] [Accepted: 06/17/2013] [Indexed: 12/13/2022]
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10
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Hosta-Rigau L, Städler B. Shear Stress and Its Effect on the Interaction of Myoblast Cells with Nanosized Drug Delivery Vehicles. Mol Pharm 2013; 10:2707-12. [DOI: 10.1021/mp4001298] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
| | - Brigitte Städler
- iNANO Interdisciplinary
Nanoscience Centre, Aarhus
University, Denmark
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11
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Computational study of particle size effects on selective binding of nanoparticles in arterial stenosis. Comput Biol Med 2013; 43:417-24. [PMID: 23566388 DOI: 10.1016/j.compbiomed.2013.02.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Revised: 05/02/2012] [Accepted: 02/09/2013] [Indexed: 11/22/2022]
Abstract
In order to elucidate particle size and wall shear effects on the selective binding of nanoparticles to vessel wall, particle binding to the wall of arterial stenosis was computationally analyzed using a transport and reaction model. The attachment rate constant was modeled as a function of shear rate and particle size. The results showed that it had a positive correlation with the shear rate for particles smaller than 600 nm and a negative correlation with the shear rate for particles larger than 800 nm. Small size particles showed high binding selectivity in the stenosis region for the normal and shear-activated wall, whereas large particles showed high binding selectivity in the low and oscillatory zone for the shear-activated wall.
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12
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Khiati S, Pierre N, Andriamanarivo S, Grinstaff MW, Arazam N, Nallet F, Navailles L, Barthélémy P. Anionic nucleotide--lipids for in vitro DNA transfection. Bioconjug Chem 2009; 20:1765-72. [PMID: 19711898 DOI: 10.1021/bc900163s] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
A family of new anionic nucleotide based lipids featuring thymidine-3'-monophosphate as nucleotide and 1,2-diacyl-sn-glycerol as lipid moiety for in vitro delivery of nucleic acids is described. The nucleotide lipids were prepared in three steps starting from 1,2-diacyl-sn-glycerols and 2'-deoxythymidine-3'-phosphoramidite. Gel electrophoresis experiments show that nucleotide-based lipid-DNA complexes are observed at Ca(2+) concentration higher than 1 mM. The transfection experiments carried out on mammalian Hek cell lines clearly demonstrate that the nucleotide moiety enhances the transfection efficacy of the natural anionic DPPA and DPPG lipids. SAXS studies indicate that the enhancement in transfection for nucleotide-based lipid formulations compared to those of the abasic natural derivative (DPPA) is likely due to the presence of the 2D columnar inverted hexagonal phase (H(II)) with a unit cell parameter a = 69.1 A in the nucleotide lipid formulations. The cytotoxicity studies of lipoplexes, evaluated against Hek cells using an MTS assay, revealed that palmitoyl nucleotide derivative complexes were not toxic even after 4 h of incubation, thus indicating that the anionic nucleotide lipids presented in this work offer an alternative to cationic transfection reagents.
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13
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Rafat M, Raad DR, Rowat AC, Auguste DT. Fabrication of reversibly adhesive fluidic devices using magnetism. LAB ON A CHIP 2009; 9:3016-9. [PMID: 19789760 DOI: 10.1039/b907957b] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
Fluidic devices are often made by irreversibly bonding a polydimethylsiloxane (PDMS) mold to itself or a glass substrate by plasma treatment. This method limits the range of materials for fluidic device fabrication and utility for subsequent processing. Here, we present a simple and inexpensive method to fabricate fluidic devices using magnets to reversibly adhere PDMS and other polymer matrices to glass or gel substrates. This approach enables fluidic devices to be fabricated from a variety of materials other than PDMS and glass. Moreover, this method can be used to fabricate composite devices, three-dimensional scaffolds and hydrogel-based fluidic devices.
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Affiliation(s)
- Marjan Rafat
- School of Engineering and Applied Sciences, Harvard University, Cambridge, MA 02138, USA
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14
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Fillafer C, Ratzinger G, Neumann J, Guttenberg Z, Dissauer S, Lichtscheidl IK, Wirth M, Gabor F, Schneider MF. An acoustically-driven biochip - impact of flow on the cell-association of targeted drug carriers. LAB ON A CHIP 2009; 9:2782-8. [PMID: 19967114 DOI: 10.1039/b906006e] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/12/2023]
Abstract
The interaction of targeted drug carriers with epithelial and endothelial barriers in vivo is largely determined by the dynamics of the body fluids. To simulate these conditions in binding assays, a fully biocompatible in vitro model was developed which can accurately mimic a wide range of physiological flow conditions on a thumbnail-format cell-chip. This acoustically-driven microfluidic system was used to study the interaction characteristics of protein-coated particles with cells. Poly(D,L-lactide-co-glycolide) (PLGA) microparticles (2.9 +/- 1 microm) were conjugated with wheat germ agglutinin (WGA-MP, cytoadhesive protein) or bovine serum albumin (BSA-MP, non-specific protein) and their binding to epithelial cell monolayers was investigated under stationary and flow conditions. While mean numbers of 1500 +/- 307 mm(-2) WGA-MP and 94 +/- 64 mm(-2) BSA-MP respectively were detected to be cell-bound in the stationary setup, incubation at increasing flow velocities increasingly antagonized the attachment of both types of surface-modified particles. However, while binding of BSA-MP was totally inhibited by flow, grafting with WGA resulted in a pronounced anchoring effect. This was indicated by a mean number of 747 +/- 241 mm(-2) and 104 +/- 44 mm(-2) attached particles at shear rates of 0.2 s(-1) and 1 s(-1) respectively. Due to the compactness of the fluidic chip which favours parallelization, this setup represents a highly promising approach towards a screening platform for the performance of drug delivery vehicles under physiological flow conditions. In this regard, the flow-chip is expected to provide substantial information for the successful design and development of targeted micro- and nanoparticulate drug carrier systems.
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Affiliation(s)
- Christian Fillafer
- Department of Pharmaceutical Technology and Biopharmaceutics, University of Vienna, A-1090, Vienna, Austria
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15
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Shuvaev VV, Christofidou-Solomidou M, Scherpereel A, Simone E, Arguiri E, Tliba S, Pick J, Kennel S, Albelda SM, Muzykantov VR. Factors modulating the delivery and effect of enzymatic cargo conjugated with antibodies targeted to the pulmonary endothelium. J Control Release 2007; 118:235-44. [PMID: 17270308 PMCID: PMC1855632 DOI: 10.1016/j.jconrel.2006.12.025] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Revised: 12/14/2006] [Accepted: 12/20/2006] [Indexed: 01/28/2023]
Abstract
Vascular drug targeting may improve therapies, yet a thorough understanding of the factors that regulate effects of drugs directed to the endothelium is needed to translate this approach into the clinical domain. To define factors modulating the efficacy and effects of endothelial targeting, we used a model enzyme (glucose oxidase, GOX) coupled with monoclonal antibodies (anti-TM(34) or anti-TM(201)) to distinct epitopes of thrombomodulin, a surface determinant enriched in the pulmonary endothelium. GOX delivery results in conversion of glucose and oxygen into H(2)O(2) leading to lung damage, a clear physiologic endpoint. Results of in vivo studies in mice showed that the efficiency of cargo delivery and its effect are influenced by a number of factors including: 1) The level of pulmonary uptake of the targeting antibody (anti-TM(201) was more efficient than anti-TM(34)); 2) The amount of an active drug delivered to the target; 3) The amount of target antigen on the endothelium (animals with suppressed TM levels showed less targeting); and, 4) The substrate availability for the enzyme cargo in the target tissue (hyperoxia augmented GOX-induced injury). Therefore, both activities of the conjugates and biological factors control targeting and effects of enzymatic cargo. Understanding the nature of such "modulating biological factors" will hopefully allow optimization and ultimately applications of drug targeting for "individualized" pharmacotherapy.
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Affiliation(s)
- Vladimir V. Shuvaev
- Institute for Environmental Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Melpo Christofidou-Solomidou
- Pulmonary Critical Care Division, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Arnaud Scherpereel
- Institute for Environmental Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
- INSERM U774, Institute Pasteur de Lille, France
| | - Eric Simone
- Department of Bioengineering, School of Engineering, University of Pennsylvania
| | - Evguenia Arguiri
- Pulmonary Critical Care Division, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Samira Tliba
- Institute for Environmental Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Jeremy Pick
- Institute for Environmental Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Stephen Kennel
- University of Tennessee Graduate School of Medicine, Knoxville, TN 37920, USA
| | - Steven M. Albelda
- Pulmonary Critical Care Division, Department of Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
| | - Vladimir R. Muzykantov
- Institute for Environmental Medicine, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
- Department of Pharmacology and Program in Targeted Therapeutics, Institute of Translational Medicine and Therapeutics, University of Pennsylvania School of Medicine, Philadelphia, PA, 19104, USA
- Corresponding author. Institute for Environmental Medicine, University of Pennsylvania Medical Center, 1 John Morgan Building, 36 Street and Hamilton Walk, Philadelphia, PA 19104-6068. Phone: 215-898-9823, FAX: 215-898-0868, e-mail address:
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16
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Kieda C, Greferath R, Crola Da Silva C, Fylaktakidou KC, Lehn JM, Nicolau C. Suppression of hypoxia-induced HIF-1alpha and of angiogenesis in endothelial cells by myo-inositol trispyrophosphate-treated erythrocytes. Proc Natl Acad Sci U S A 2006; 103:15576-81. [PMID: 17028170 PMCID: PMC1622864 DOI: 10.1073/pnas.0607109103] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Allosteric regulation of oxygen delivery by RBCs may have significant effects on tumor growth. Indeed, angiogenesis, the formation of new blood vessels, is induced in growing tumors by low oxygen partial pressure. Hypoxia-inducible genes are switched on, among which are the VEGF gene and its receptors. Most important, under hypoxia, hypoxia-inducible factor 1alpha has a significantly prolonged half-life and up-regulates a number of hypoxia genes. Human microvascular endothelial cells (MECs), when subjected in vitro to hypoxia, align to form vessel-like structures as in the angiogenic process. We report here that, when cultured in hypoxic conditions in the presence of human RBCs loaded with a new membrane-permeant allosteric effector of Hb, myo-inositol trispyrophosphate (ITPP), endothelial cells (ECs) do not align, i.e., do not form "vessel"-like structures, because the "loaded" RBCs are capable of releasing under hypoxia more oxygen than their "normal" counterparts. Levels of VEGF and of hypoxia-inducible factor 1alpha, elevated in the human MECs under hypoxia, were dramatically reduced or even suppressed in the presence of the ITPP-loaded RBCs. Treatment of these ECs directly with free ITPP at different concentrations had no effect on their ability to undertake angiogenesis. Incubation with ITPP enhances the capacity of Hb to release bound oxygen, leading to higher oxygen tension in the hypoxic environment, thus inhibiting hypoxia-induced angiogenesis. These observations are suggestive of a potential in vivo role of ITPP-loaded, "low-O2-affinity" RBCs in cancer therapy.
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Affiliation(s)
- Claudine Kieda
- *Centre de Biophysique Moléculaire, Centre National de la Recherche Scientifique, Unité Propre de Recherche 4301, 45045 Orléans, France
| | - Ruth Greferath
- Oxyplus, Inc., 200 Boston Avenue, Medford, MA 02155; and
- Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France
| | - Claire Crola Da Silva
- *Centre de Biophysique Moléculaire, Centre National de la Recherche Scientifique, Unité Propre de Recherche 4301, 45045 Orléans, France
| | - Konstantina C. Fylaktakidou
- Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France
| | - Jean-Marie Lehn
- Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France
- To whom correspondence may be addressed. E-mail:
or
| | - Claude Nicolau
- Oxyplus, Inc., 200 Boston Avenue, Medford, MA 02155; and
- Institut de Science et d'Ingénierie Supramoléculaires, Université Louis Pasteur, 8 Allée Gaspard Monge, BP 70028, 67083 Strasbourg Cedex, France
- To whom correspondence may be addressed. E-mail:
or
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