1
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Abdelgawad MS, Haward SJ, Shen AQ, Rosti ME. From yield stress to elastic instabilities: Tuning the extensional behavior of elastoviscoplastic fluids. PNAS NEXUS 2024; 3:pgae227. [PMID: 38911595 PMCID: PMC11192060 DOI: 10.1093/pnasnexus/pgae227] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/06/2024] [Accepted: 05/30/2024] [Indexed: 06/25/2024]
Abstract
In this study, we delve into the intricacies of elastoviscoplastic (EVP) fluids, particularly focusing on how polymer additives influence their extensional behavior. Our findings reveal that polymer additives significantly alter the extensional properties of the EVP fluids, such as relaxation time and extensional stresses while having negligible impact on the shear rheology. Interestingly, the modified fluids exhibit a transition from yield stress-like behavior to viscoelastic-like behavior under high extensional rates, ultimately leading to destabilization under extreme deformation. This research enhances the fundamental understanding of EVP fluids and highlights potential advancements in applications, especially in precision-demanding fields like 3D printing.
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Affiliation(s)
- Mohamed S Abdelgawad
- Complex Fluids and Flows Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Simon J Haward
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Amy Q Shen
- Micro/Bio/Nanofluidics Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
| | - Marco E Rosti
- Complex Fluids and Flows Unit, Okinawa Institute of Science and Technology Graduate University, Onna, Okinawa 904-0495, Japan
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2
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The Progress of Non-Viral Materials and Methods for Gene Delivery to Skeletal Muscle. Pharmaceutics 2022; 14:pharmaceutics14112428. [DOI: 10.3390/pharmaceutics14112428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 10/27/2022] [Accepted: 11/02/2022] [Indexed: 11/12/2022] Open
Abstract
Since Jon A. Wolff found skeletal muscle cells being able to express foreign genes and Russell J. Mumper increased the gene transfection efficiency into the myocytes by adding polymers, skeletal muscles have become a potential gene delivery and expression target. Different methods have been developing to deliver transgene into skeletal muscles. Among them, viral vectors may achieve potent gene delivery efficiency. However, the potential for triggering biosafety risks limited their clinical applications. Therefore, non-viral biomaterial-mediated methods with reliable biocompatibility are promising tools for intramuscular gene delivery in situ. In recent years, a series of advanced non-viral gene delivery materials and related methods have been reported, such as polymers, liposomes, cell penetrating peptides, as well as physical delivery methods. In this review, we summarized the research progresses and challenges in non-viral intramuscular gene delivery materials and related methods, focusing on the achievements and future directions of polymers.
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3
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Toscanini MA, Limeres MJ, Garrido AV, Cagel M, Bernabeu E, Moretton MA, Chiappetta DA, Cuestas ML. Polymeric micelles and nanomedicines: Shaping the future of next generation therapeutic strategies for infectious diseases. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102927] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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4
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Sainz-Ramos M, Villate-Beitia I, Gallego I, AL Qtaish N, Menéndez M, Lagartera L, Grijalvo S, Eritja R, Puras G, Pedraz JL. Correlation between Biophysical Properties of Niosomes Elaborated with Chloroquine and Different Tensioactives and Their Transfection Efficiency. Pharmaceutics 2021; 13:pharmaceutics13111787. [PMID: 34834203 PMCID: PMC8623750 DOI: 10.3390/pharmaceutics13111787] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Revised: 10/21/2021] [Accepted: 10/22/2021] [Indexed: 01/22/2023] Open
Abstract
Lipid nanocarriers, such as niosomes, are considered attractive candidates for non-viral gene delivery due to their suitable biocompatibility and high versatility. In this work, we studied the influence of incorporating chloroquine in niosomes biophysical performance, as well as the effect of non-ionic surfactant composition and protocol of incorporation in their biophysical performance. An exhaustive comparative evaluation of three niosome formulations differing in these parameters was performed, which included the analysis of their thermal stability, rheological behavior, mean particle size, dispersity, zeta potential, morphology, membrane packing capacity, affinity to bind DNA, ability to release and protect the genetic material, buffering capacity and ability to escape from artificially synthesized lysosomes. Finally, in vitro biological studies were, also, performed in order to determine the compatibility of the formulations with biological systems, their transfection efficiency and transgene expression. Results revealed that the incorporation of chloroquine in niosome formulations improved their biophysical properties and the transfection efficiency, while the substitution of one of the non-ionic surfactants and the phase of addition resulted in less biophysical variations. Of note, the present work provides several biophysical parameters and characterization strategies that could be used as gold standard for gene therapy nanosystems evaluation.
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Affiliation(s)
- Myriam Sainz-Ramos
- Laboratory of Pharmacy and Pharmaceutical Technology, NanoBioCel Research Group, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (M.S.-R.); (I.V.-B.); (I.G.); (N.A.Q.)
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Bioaraba, NanoBioCel Research Group, Calle Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - Ilia Villate-Beitia
- Laboratory of Pharmacy and Pharmaceutical Technology, NanoBioCel Research Group, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (M.S.-R.); (I.V.-B.); (I.G.); (N.A.Q.)
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Bioaraba, NanoBioCel Research Group, Calle Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - Idoia Gallego
- Laboratory of Pharmacy and Pharmaceutical Technology, NanoBioCel Research Group, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (M.S.-R.); (I.V.-B.); (I.G.); (N.A.Q.)
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Bioaraba, NanoBioCel Research Group, Calle Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
| | - Nuseibah AL Qtaish
- Laboratory of Pharmacy and Pharmaceutical Technology, NanoBioCel Research Group, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (M.S.-R.); (I.V.-B.); (I.G.); (N.A.Q.)
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
| | - Margarita Menéndez
- Rocasolano Physical Chemistry Institute, Superior Council of Scientific Investigations (IQFR-CSIC), Calle Serrano 119, 28006 Madrid, Spain;
- Biomedical Research Networking Centre in Respiratory Diseases (CIBERES), Av. Monforte de Lemos 3–5, 28029 Madrid, Spain
| | - Laura Lagartera
- Institute of Medicinal Chemistry (IQM-CSIC), Calle Juan de la Cierva 3, 28006 Madrid, Spain;
| | - Santiago Grijalvo
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Calle Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Ramón Eritja
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Institute of Advanced Chemistry of Catalonia (IQAC-CSIC), Calle Jordi Girona 18-26, 08034 Barcelona, Spain
| | - Gustavo Puras
- Laboratory of Pharmacy and Pharmaceutical Technology, NanoBioCel Research Group, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (M.S.-R.); (I.V.-B.); (I.G.); (N.A.Q.)
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Bioaraba, NanoBioCel Research Group, Calle Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
- Correspondence: (G.P.); (J.L.P.); Tel.: +34-945014539 (G.P.); +34-945013091 (J.L.P.)
| | - José Luis Pedraz
- Laboratory of Pharmacy and Pharmaceutical Technology, NanoBioCel Research Group, Faculty of Pharmacy, University of the Basque Country (UPV/EHU), Paseo de la Universidad 7, 01006 Vitoria-Gasteiz, Spain; (M.S.-R.); (I.V.-B.); (I.G.); (N.A.Q.)
- Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Institute of Health Carlos III, Av. Monforte de Lemos 3–5, 28029 Madrid, Spain; (S.G.); (R.E.)
- Bioaraba, NanoBioCel Research Group, Calle Jose Atxotegi, s/n, 01009 Vitoria-Gasteiz, Spain
- Correspondence: (G.P.); (J.L.P.); Tel.: +34-945014539 (G.P.); +34-945013091 (J.L.P.)
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Sahu S, Karan P, Mishra AK. Nature of Saccharide-Induced F127 Micellar Dehydration: An Insight with FDAPT (2-Formyl-5-(4'- N, N-dimethylaminophenyl)thiophene), a Multiparametric Fluorescent Probe. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2021; 37:3067-3074. [PMID: 33650876 DOI: 10.1021/acs.langmuir.0c03284] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
FDAPT (2-formyl-5-(4'-N,N-dimethylaminophenyl)thiophene) is an efficient environment-sensitive fluorescent probe, which senses the alteration of its microenvironment with six different fluorescent parameters, namely, emission intensity, wavelength, fluorescence anisotropy, and corresponding three time-dependent parameters fluorescence lifetime, time-resolved emission spectrum, and anisotropy decay. In the present work, the nature of saccharide-induced dehydration of a F127 polymeric micelle is investigated in detail with FDAPT emission. Using a multiparametric fluorescence approach, it is observed that the saccharide molecules not only decrease the critical micellization temperature of the F127 solution but also strongly alter the physical properties inside the micellar structures. The local polarity and fluidity significantly decrease in the saccharide-induced micelle as compared to the normal F127 micelle. The probe solvation dynamics study reveals that the water content in the core as well as corona domain diminishes significantly in the saccharide-induced micelle as compared to the normal micelle. More precisely, dehydration occurs more in the core region than in the corona region. Also, the saccharide-induced dehydration alters the relative size of the core and corona regions. The extent of dehydration varies with different saccharide molecules. It is also found that the dehydration efficiency order is trisaccharide (raffinose) > disaccharide (sucrose) > monosaccharide (glucose and fructose).
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Affiliation(s)
- Saugata Sahu
- Department of Chemistry, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, Chennai 600036, India
| | - Pulak Karan
- Department of Chemistry, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, Chennai 600036, India
| | - Ashok Kumar Mishra
- Department of Chemistry, Indian Institute of Technology Madras, Sardar Patel Road, Adyar, Chennai 600036, India
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6
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Ma SM, Zhao L, Wang YL, Zhu YL, Lu ZY. The coarse-grained models of poly(ethylene oxide) and poly(propylene oxide) homopolymers and poloxamers in big multipole water (BMW) and MARTINI frameworks. Phys Chem Chem Phys 2020; 22:15976-15985. [PMID: 32632434 DOI: 10.1039/d0cp01006e] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Polyethylene oxide (PEO) and poly(propylene oxide) (PPO), especially their tri-block copolymers PEO-PPO-PEO (poloxamers), have a broad range of applications in biotechnology and medical science. Understanding their specific interactions with biomembranes is the key to unveil the unique features of poloxamers either as membrane-healing or membrane pore-forming agents. Based on the coarse-graining convention of the MARTINI force field and the big multipole water (BMW) model, which has a three charged site topology and can reproduce the correct dipole moment of four-water clusters, we generated coarse-grained (CG) models with analytical and numerical potentials for PEO and PPO homopolymers and poloxamers in dilute solution. The effective bonded interaction potentials between CG beads were determined from the probability distributions of bond lengths, angles and dihedrals that are determined from atomistic simulations. The nonbonded interaction parameters were fine-tuned to reproduce the conformational properties of atomistic PEO and PPO homopolymers and poloxamers via extensive CG simulations of PEO and PPO homopolymers and poloxamers in a BMW water environment. The reported CG models provide a promising framework for a comprehensive understanding of the microstructural, conformational, and dynamic properties of poloxamers and their delicate interactions with other species in an explicit water environment.
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Affiliation(s)
- Su-Min Ma
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
| | - Li Zhao
- College of Life Sciences, Jilin University, Changchun 130012, China
| | - Yong-Lei Wang
- Department of Materials and Environmental Chemistry, Arrhenius Laboratory, Stockholm University, SE-10691, Stockholm, Sweden.
| | - You-Liang Zhu
- State Key Laboratory of Polymer Physics and Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun 130022, China
| | - Zhong-Yuan Lu
- State Key Laboratory of Supramolecular Structure and Materials, Institute of Theoretical Chemistry, Jilin University, Changchun 130023, China.
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7
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Le Guen YT, Le Gall T, Midoux P, Guégan P, Braun S, Montier T. Gene transfer to skeletal muscle using hydrodynamic limb vein injection: current applications, hurdles and possible optimizations. J Gene Med 2020; 22:e3150. [PMID: 31785130 DOI: 10.1002/jgm.3150] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2019] [Revised: 11/27/2019] [Accepted: 11/27/2019] [Indexed: 11/06/2022] Open
Abstract
Hydrodynamic limb vein injection is an in vivo locoregional gene delivery method. It consists of administrating a large volume of solution containing nucleic acid constructs in a limb with both blood inflow and outflow temporarily blocked using a tourniquet. The fast, high pressure delivery allows the musculature of the whole limb to be reached. The skeletal muscle is a tissue of choice for a variety of gene transfer applications, including gene therapy for Duchenne muscular dystrophy or other myopathies, as well as for the production of antibodies or other proteins with broad therapeutic effects. Hydrodynamic limb vein delivery has been evaluated with success in a large range of animal models. It has also proven to be safe and well-tolerated in muscular dystrophy patients, thus supporting its translation to the clinic. However, some possible limitations may occur at different steps of the delivery process. Here, we have highlighted the interests, bottlenecks and potential improvements that could further optimize non-viral gene transfer following hydrodynamic limb vein injection.
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Affiliation(s)
| | - Tony Le Gall
- Univ Brest, INSERM, EFS, UMR 1078, GGB, F-29200, Brest, France
| | - Patrick Midoux
- Centre de Biophysique Moléculaire, CNRS UPR 4301, Université d'Orléans, France
| | - Philippe Guégan
- Laboratoire de chimie des polymères, Sorbonne Université, CNRS UMR 8232, UPMC Paris 06, F-75005, Paris, France
| | - Serge Braun
- AFM Telethon, 1 rue de l'Internationale, BP59, 91002 Evry, France
| | - Tristan Montier
- Univ Brest, INSERM, EFS, UMR 1078, GGB, F-29200, Brest, France.,Service de Génétique Médicale et Biologie de la Reproduction, Centre de référence des maladies rares 'Maladies neuromusculaires', CHRU de Brest, F-29200, Brest, France
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8
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Rasolonjatovo B, Illy N, Bennevault V, Mathé J, Midoux P, Le Gall T, Haudebourg T, Montier T, Lehn P, Pitard B, Cheradame H, Huin C, Guégan P. Temperature‐Sensitive Amphiphilic Non‐Ionic Triblock Copolymers for Enhanced In Vivo Skeletal Muscle Transfection. Macromol Biosci 2020; 20:e1900276. [DOI: 10.1002/mabi.201900276] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 10/30/2019] [Indexed: 01/23/2023]
Affiliation(s)
- Bazoly Rasolonjatovo
- LAMBE, CNRS, Université Evry, CEAUniversité Paris–Saclay 91025 Evry France
- LAMBE, UCPUniversité Paris–Seine 91025 Evry France
| | - Nicolas Illy
- Equipe Chimie des Polymères, Institut Parisien de Chimie Moléculaire, CNRS, Sorbonne Université 4 Place Jussieu 75005 Paris France
| | - Véronique Bennevault
- Equipe Chimie des Polymères, Institut Parisien de Chimie Moléculaire, CNRS, Sorbonne Université 4 Place Jussieu 75005 Paris France
- Université Evry 91025 Evry France
| | - Jérôme Mathé
- LAMBE, CNRS, Université Evry, CEAUniversité Paris–Saclay 91025 Evry France
- LAMBE, UCPUniversité Paris–Seine 91025 Evry France
| | - Patrick Midoux
- Centre de Biophysique MoléculaireCNRS UPR4301 45071 Orléans Cedex 02 France
| | - Tony Le Gall
- Groupe – Transfert de Gènes et Thérapie Génique, UMR 1078 – Génétique, Génomique Fonctionnelle et BiotechnologiesUniversité de Brest, INSERM, CHU de Brest 22 Avenue Camille Desmoulins 29238 Brest Cedex France
| | - Thomas Haudebourg
- CRCINA, INSERMUniversity of Angers, University of Nantes 49000 and 44000 Nantes France
| | - Tristan Montier
- Groupe – Transfert de Gènes et Thérapie Génique, UMR 1078 – Génétique, Génomique Fonctionnelle et BiotechnologiesUniversité de Brest, INSERM, CHU de Brest 22 Avenue Camille Desmoulins 29238 Brest Cedex France
| | - Pierre Lehn
- Groupe – Transfert de Gènes et Thérapie Génique, UMR 1078 – Génétique, Génomique Fonctionnelle et BiotechnologiesUniversité de Brest, INSERM, CHU de Brest 22 Avenue Camille Desmoulins 29238 Brest Cedex France
| | - Bruno Pitard
- CRCINA, INSERMUniversity of Angers, University of Nantes 49000 and 44000 Nantes France
| | - Herve Cheradame
- LAMBE, CNRS, Université Evry, CEAUniversité Paris–Saclay 91025 Evry France
- LAMBE, UCPUniversité Paris–Seine 91025 Evry France
| | - Cécile Huin
- Equipe Chimie des Polymères, Institut Parisien de Chimie Moléculaire, CNRS, Sorbonne Université 4 Place Jussieu 75005 Paris France
- Université Evry 91025 Evry France
| | - Philippe Guégan
- Equipe Chimie des Polymères, Institut Parisien de Chimie Moléculaire, CNRS, Sorbonne Université 4 Place Jussieu 75005 Paris France
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Gene delivery to the rat retina by non-viral vectors based on chloroquine-containing cationic niosomes. J Control Release 2019; 304:181-190. [PMID: 31071372 DOI: 10.1016/j.jconrel.2019.05.010] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 02/15/2019] [Accepted: 05/04/2019] [Indexed: 01/14/2023]
Abstract
The incorporation of chloroquine within nano formulations, rather than as a co-treatment of the cells, could open a new avenue for in vivo retinal gene delivery. In this manuscript, we evaluated the incorporation of chloroquine diphosphate into the cationic niosome formulation composed of poloxamer 188, polysorbate 80 non-ionic surfactants, and 2,3-di (tetradecyloxy) propan-1-amine (hydrochloride salt) cationic lipid, to transfect rat retina. Niosome formulations without and with chloroquine diphosphate (DPP80, and DPP80-CQ, respectively) were prepared by the reverse phase evaporation technique and characterized in terms of size, PDI, zeta potential, and morphology. After the incorporation of the pCMS-EGFP plasmid, the resultant nioplexes -at different cationic lipid/DNA mass ratios- were further evaluated to compact, liberate, and secure the DNA against enzymatic digestion. In vitro procedures were achieved in ARPE-19 cells to assess transfection efficacy and intracellular transportation. Both nioplexes formulations transfected efficiently ARPE-19 cells, although the cell viability was clearly better in the case of DPP80-CQ nioplexes. After subretinal and intravitreal injections, DPP80 nioplexes were not able to transfect the rat retina. However, chloroquine containing vector showed protein expression in many retinal cells, depending on the administration route. These data provide new insights for retinal gene delivery based on chloroquine-containing niosome non-viral vectors.
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10
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Lao Y, Li M, Gao MA, Shao D, Chi C, Huang D, Chakraborty S, Ho T, Jiang W, Wang H, Wang S, Leong KW. HPV Oncogene Manipulation Using Nonvirally Delivered CRISPR/Cas9 or Natronobacterium gregoryi Argonaute. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2018; 5:1700540. [PMID: 30027026 PMCID: PMC6051382 DOI: 10.1002/advs.201700540] [Citation(s) in RCA: 64] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Revised: 03/01/2018] [Indexed: 05/25/2023]
Abstract
CRISPR/Cas9 technology enables targeted gene editing; yet, the efficiency and specificity remain unsatisfactory, particularly for the nonvirally delivered, plasmid-based CRISPR/Cas9 system. To tackle this, a self-assembled micelle is developed and evaluated for human papillomavirus (HPV) E7 oncogene disruption. The optimized micelle enables effective delivery of Cas9 plasmid with a transient transgene expression profile, benefiting the specificity of Cas9 recognition. Furthermore, the feasibility of using the micelle is explored for another nucleic acid-guided nuclease system, Natronobacterium gregoryi Argonaute (NgAgo). Both systems are tested in vitro and in vivo to evaluate their therapeutic potential. Cas9-mediated E7 knockout leads to significant inhibition of HPV-induced cancerous activity both in vitro and in vivo, while NgAgo does not show significant E7 inhibition on the xenograft mouse model. Collectively, this micelle represents an efficient delivery system for nonviral gene editing, adding to the armamentarium of gene editing tools to advance safe and effective precision medicine-based therapeutics.
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Affiliation(s)
- Yeh‐Hsing Lao
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Mingqiang Li
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Madeleine A. Gao
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Dan Shao
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Chun‐Wei Chi
- Department of Biomedical EngineeringCUNY—City College of New YorkNew YorkNY10031USA
| | - Dantong Huang
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | | | - Tzu‐Chieh Ho
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Weiqian Jiang
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Hong‐Xia Wang
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
| | - Sihong Wang
- Department of Biomedical EngineeringCUNY—City College of New YorkNew YorkNY10031USA
| | - Kam W. Leong
- Department of Biomedical EngineeringColumbia UniversityNew YorkNY10027USA
- Department of Systems BiologyColumbia University Medical CenterNew YorkNY10032USA
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11
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Rey-Rico A, Cucchiarini M. PEO-PPO-PEO Tri-Block Copolymers for Gene Delivery Applications in Human Regenerative Medicine-An Overview. Int J Mol Sci 2018. [PMID: 29518011 PMCID: PMC5877636 DOI: 10.3390/ijms19030775] [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] [Indexed: 01/15/2023] Open
Abstract
Lineal (poloxamers or Pluronic®) or X-shaped (poloxamines or Tetronic®) amphiphilic tri-block copolymers of poly(ethylene oxide) and poly(propylene oxide) (PEO-PPO-PEO) have been broadly explored for controlled drug delivery in different regenerative medicine approaches. The ability of these copolymers to self-assemble as micelles and to undergo sol-to-gel transitions upon heating has endowed the denomination of “smart” or “intelligent” systems. The use of PEO-PPO-PEO copolymers as gene delivery systems is a powerful emerging strategy to improve the performance of classical gene transfer vectors. This review summarizes the state of art of the application of PEO-PPO-PEO copolymers in both nonviral and viral gene transfer approaches and their potential as gene delivery systems in different regenerative medicine approaches.
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Affiliation(s)
- Ana Rey-Rico
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg/Saar, Germany.
- Centro de Investigacións Científicas Avanzadas (CICA), Universidade da Coruña, Campus de A Coruña, 15071 A Coruña, Spain.
| | - Magali Cucchiarini
- Center of Experimental Orthopaedics, Saarland University Medical Center, Kirrbergerstr. Bldg 37, D-66421 Homburg/Saar, Germany.
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12
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Cambón A, Villar-Alvarez E, Alatorre-Meda M, Pardo A, Hiram B, Barbosa S, Taboada P, Mosquera V. Characterization of the complexation phenomenon and biological activity in vitro of polyplexes based on Tetronic T901 and DNA. J Colloid Interface Sci 2018; 519:58-70. [PMID: 29482097 DOI: 10.1016/j.jcis.2018.02.051] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Revised: 02/15/2018] [Accepted: 02/16/2018] [Indexed: 12/31/2022]
Abstract
The complexation process and underlying mechanisms that rule the interaction of DNA with the cationic block copolymer Tetronic T901 to form polyplexes and their potential transfection efficiency have been studied under different solution conditions. We noted that T901 favors the formation of self-assembled structures with partially condensed DNA at smaller polymer concentrations than other Pluronic™/Tetronic™-type copolymers previously analysed. The observed polyplexes display sizes from the nano- to the micro- range as derived from DLS, electronic and optical microscopies. Also, copolymer micelles are observed at concentrations below the copolymer critical micellar concentration (cmc) induced by the presence of DNA. The complexation process is dependent on solution conditions, with electrostatic and ionic interactions being more important at acidic pH thanks to the predominant diprotonated form of the block copolymer which is less aggregation-prone, whilst dispersive forces are increasingly enhanced under basic conditions or when rising the solution temperature. Whatever the case, the complexation is mainly governed by entropic contributions, as denoted from ITC data. In vitro transfection experiments after complexing T901 with a pDNA encoding the expression of green fluorescein protein, GFP, show a relative successful fluorescence of transfected HeLa cells, which confirms the uptake, internalization and release of the genetic material within the cells at suitable [N]/[P] ratios with relatively low cytotoxicity. Despite the observed successful outcomes, the obtained transfection efficacies are slightly lower than those obtained with Lipofectamine2000, so further optimization of the polyplex formation conditions is envisaged in future studies.
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Affiliation(s)
- Adriana Cambón
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Eva Villar-Alvarez
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Manuel Alatorre-Meda
- CONACyT-Instituto Tecnológico de Tijuana, Centro de Graduados e Investigación en Química, Blvd. Alberto Limón Padilla S/N, 22510 Tijuana, B.C., Mexico
| | - Alberto Pardo
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Baltazar Hiram
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain; Departamento de Física, Universidad de Sonora, Rosales y Transversal, 83000 Hermosillo, Sonora, Mexico
| | - Silvia Barbosa
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
| | - Pablo Taboada
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain.
| | - Víctor Mosquera
- Colloids and Polymers Physics Group, Department of Particle Physics, Universidade de Santiago de Compostela, Santiago de Compostela 15782, Spain
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Chang PY, Huang Y, Hung TY, Chong KY, Chang YS, Chao CCK, Chow KPN. Spontaneous metastases in immunocompetent mice harboring a primary tumor driven by oncogene latent membrane protein 1 from Epstein-Barr virus. Biomed J 2016; 39:261-271. [PMID: 27793268 PMCID: PMC6139811 DOI: 10.1016/j.bj.2015.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2015] [Accepted: 12/09/2015] [Indexed: 02/07/2023] Open
Abstract
Background In vitro and clinical studies suggest that the oncogene LMP1 (latent membrane protein 1) encoded by Epstein–Barr virus (EBV) plays a role in the development of nasopharyngeal carcinoma (NPC) and the formation of metastases in immunocompetent individuals. However, whether LMP1 itself is sufficient to drive these events in immunocompetent hosts remains elusive due to the lack of appropriate experimental models. The aim of this study was to study LMP1-dependent tumorigenesis and metastasis in BALB/c mice inoculated with BALB/c-3T3 cells expressing N-LMP1 (a Taiwanese NPC variant). Methods Following cancer cell inoculation, metastasis formation was monitored over time using PCR analysis of LMP1 as tumor marker. We also used a luciferase (Luc)-containing N-LMP1 and bioluminescent imaging (BLI) to monitor metastasis formation in a non-invasive manner. Results N-LMP1 appeared early in draining lymph nodes and in various distant organs before the rapid growth of the primary tumor. Lung metastasis was observed by BLI and further confirmed by histological examination. Furthermore, we detected luciferase signals in the lungs, even before the animals were sacrificed. Conclusions Our results demonstrate the high metastatic character of N-LMP1 in immunocompetent hosts. Systemic tumor dissemination occurs even before aggressive tumor growth at the primary site, suggesting that early treatment of primary LMP1-associated tumors and distant micro-metastases is critical to achieve positive results.
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Affiliation(s)
- Pu-Yuan Chang
- Tumor Biology Laboratory, Department of Biochemistry and Molecular Biology, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yenlin Huang
- Department of Anatomic Pathology, Chang Gung Memorial Hospital at Linkou, Chang Gung University College of Medicine, Taoyuan, Taiwan
| | - Tzu-Yuan Hung
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Kowit-Yu Chong
- Department of Medical Biotechnology and Laboratory Science, College of Medicine, Chang Gung University, Taoyuan, Taiwan
| | - Yu-Sun Chang
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Molecular Medical Research Center, Chang Gung University, Taoyuan, Taiwan
| | - Chuck C-K Chao
- Tumor Biology Laboratory, Department of Biochemistry and Molecular Biology, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
| | - Kai-Ping N Chow
- Graduate Institute of Biomedical Sciences, College of Medicine, Chang Gung University, Taoyuan, Taiwan; Department of Microbiology and Immunology, College of Medicine, Chang Gung University, Taoyuan, Taiwan.
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14
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Wang M, Wu B, Tucker JD, Lu P, Lu Q. Poly(ester amine) constructed from polyethylenimine and pluronic for gene delivery in vitro and in vivo. Drug Deliv 2016; 23:3224-3233. [PMID: 26960992 DOI: 10.3109/10717544.2016.1162877] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023] Open
Abstract
A series of poly (ester amines) (PEAs) constructed from low molecular weight polyethyleneimine (LPEI, Mw: 0.8k, 1.2k Da) and Pluronic (different molecular weight (Mw) and hydrophilic-lipophilic-balance (HLB)) components were synthesized, and evaluated in vitro and in vivo as gene delivery carriers. Most PEA polymers were able to bind and condense plasmid DNA effectively into particles of approximately 150 nm in solution at the polymer/DNA ratio of 5 and above. Transfection efficiency of the PEA polymers depends on particle size of the polymer/DNA complex, molecular weight and HLB of the Pluronics and the size of PEI within PEA composition, as well as the cell type. Significant improvement in gene delivery efficacy was achieved with PEA01/04/05 composed of Pluronic size (Mw: 3000-5000 Da), and HLB (12-18) in CHO, C2C12 and HSkM cell lines; and the effective transfection was reflected with PEA 01/04/07 composed of Pluronics with size (2000-5000 Da) and HLB (12-23) in mdx mice. The best formulation for pDNA delivery was obtained with PEA 01 producing transgene expression efficiency 5, 19-folds of that of PEI 25k in vitro and in vivo, respectively. These results potent some of these PEA polymers as attractive vehicles for gene or oligonucleotide delivery.
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Affiliation(s)
- Mingxing Wang
- a McColl-Lockwood Laboratory for Muscular Dystrophy Research, Carolinas Medical Center , Charlotte , NC , USA
| | - Bo Wu
- a McColl-Lockwood Laboratory for Muscular Dystrophy Research, Carolinas Medical Center , Charlotte , NC , USA
| | - Jason D Tucker
- a McColl-Lockwood Laboratory for Muscular Dystrophy Research, Carolinas Medical Center , Charlotte , NC , USA
| | - Peijuan Lu
- a McColl-Lockwood Laboratory for Muscular Dystrophy Research, Carolinas Medical Center , Charlotte , NC , USA
| | - Qilong Lu
- a McColl-Lockwood Laboratory for Muscular Dystrophy Research, Carolinas Medical Center , Charlotte , NC , USA
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15
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Mahajan V, Gaymalov Z, Alakhova D, Gupta R, Zucker IH, Kabanov AV. Horizontal gene transfer from macrophages to ischemic muscles upon delivery of naked DNA with Pluronic block copolymers. Biomaterials 2015; 75:58-70. [PMID: 26480472 DOI: 10.1016/j.biomaterials.2015.10.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2015] [Revised: 09/30/2015] [Accepted: 10/01/2015] [Indexed: 12/31/2022]
Abstract
Intramuscular administration of plasmid DNA (pDNA) with non-ionic Pluronic block copolymers increases gene expression in injected muscles and lymphoid organs. We studied the role of immune cells in muscle transfection upon inflammation. Local inflammation in murine hind limb ischemia model (MHLIM) drastically increased DNA, RNA and expressed protein levels in ischemic muscles injected with pDNA/Pluronic. The systemic inflammation (MHLIM or peritonitis) also increased expression of pDNA/Pluronic in the muscles. When pDNA/Pluronic was injected in ischemic muscles the reporter gene, Green Fluorescent Protein (GFP) co-localized with desmin(+) muscle fibers and CD11b(+) macrophages (MØs), suggesting transfection of MØs along with the muscle cells. P85 enhanced (∼ 4 orders) transfection of MØs with pDNA in vitro. Moreover, adoptively transferred MØs were shown to pass the transgene to inflamed muscle cells in MHLIM. Using a co-culture of myotubes (MTs) and transfected MØs expressing a reporter gene under constitutive (cmv-luciferase) or muscle specific (desmin-luciferase) promoter we demonstrated that P85 enhances horizontal gene transfer from MØ to MTs. Therefore, MØs can play an important role in muscle transfection with pDNA/Pluronic during inflammation, with both inflammation and Pluronic contributing to the increased gene expression. pDNA/Pluronic has potential for therapeutic gene delivery in muscle pathologies that involve inflammation.
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Affiliation(s)
- Vivek Mahajan
- Division of Molecular Pharmaceutics, Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA; Department of Pathology and Microbiology, University of Nebraska Medical Center, Omaha, NE 68198-5850, USA
| | - Zagit Gaymalov
- Division of Molecular Pharmaceutics, Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA; Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5850, USA
| | - Daria Alakhova
- Division of Molecular Pharmaceutics, Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Richa Gupta
- Division of Molecular Pharmaceutics, Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Irving H Zucker
- Department of Cellular and Integrative Physiology, University of Nebraska Medical Center, Omaha, NE 68198-5850, USA
| | - Alexander V Kabanov
- Division of Molecular Pharmaceutics, Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA; Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5850, USA; Laboratory of Chemical Design of Bionanomaterials, Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119899 Moscow, Russia.
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He Z, Miao L, Jordan R, S-Manickam D, Luxenhofer R, Kabanov AV. A Low Protein Binding Cationic Poly(2-oxazoline) as Non-Viral Vector. Macromol Biosci 2015; 15:1004-20. [PMID: 25846127 PMCID: PMC4893346 DOI: 10.1002/mabi.201500021] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2015] [Revised: 03/12/2015] [Indexed: 01/01/2023]
Abstract
Developing safe and efficient non-viral gene delivery systems remains a major challenge. We present a new cationic poly(2-oxazoline) (CPOx) block copolymer for gene therapy that was synthesized by sequential polymerization of non-ionic 2-methyl-2-oxazoline and a new 2-oxazoline monomer, 2-(N-methyl, N-Boc-amino)-methyl-2-oxazoline, followed by deprotection of the pendant secondary amine groups. Upon mixing with plasmid DNA (pDNA), CPOx forms small (diameter ≈80 nm) and narrowly dispersed polyplexes (PDI <0.2), which are stable upon dilution in saline and against thermal challenge. These polyplexes exhibited low plasma protein binding and very low cytotoxicity in vitro compared to the polyplexes of pDNA and poly(ethylene glycol)-b-poly(L-lysine) (PEG-b-PLL). CPOx/pDNA polyplexes at N/P = 5 bound considerably less plasma protein compared to polyplexes of PEG-b-PLL at the same N/P ratio. This is a unique aspect of the developed polyplexes emphasizing their potential for systemic delivery in vivo. The transfection efficiency of the polyplexes in B16 murine melanoma cells was low after 4 h, but increased significantly for 10 h exposure time, indicative of slow internalization of polyplexes. Addition of Pluronic P85 boosted the transfection using CPOx/pDNA polyplexes considerably. The low protein binding of CPOx/pDNA polyplexes is particularly interesting for the future development of targeted gene delivery.
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Affiliation(s)
- Zhijian He
- Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Lei Miao
- Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Rainer Jordan
- Department Chemie, Technische Universität Dresden, Mommsenstr. 4, 01069 Dresden, Germany
| | - Devika S-Manickam
- Center for Nanotechnology in Drug Delivery, Division of Molecular Pharmaceutics, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, NC 27599, USA
| | - Robert Luxenhofer
- Functional Polymer Materials, Chair for Chemical Technology of Materials Synthesis, Universität Würzburg, 97070 Würzburg, Germany.
| | - Alexander V Kabanov
- Laboratory for Chemical Design of Bionanomaterials, Faculty of Chemistry, M.V. Lomonosov Moscow State University, Moscow 119899, Russia.
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17
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Chen J, Luo J, Zhao Y, Pu L, Lu X, Gao R, Wang G, Gu Z. Increase in transgene expression by pluronic L64-mediated endosomal/lysosomal escape through its membrane-disturbing action. ACS APPLIED MATERIALS & INTERFACES 2015; 7:7282-7293. [PMID: 25786540 DOI: 10.1021/acsami.5b00486] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
For efficient transgene delivery and expression, internalized nucleic acids should quickly escape from cellular endosomes and lysosomes to avoid enzymatic destruction and degradation. Here, we report a novel strategy for safe and efficient endosomal/lysosomal escape of transgenes mediated by Pluronic L64, a neutral amphiphilic triblock copolymer. L64 enhanced the permeability of biomembranes by structural disturbance and pore formation in a concentration- and time-dependent manner. When applied at optimal concentration, it rapidly reached the endosome/lysosome compartments, where it facilitated escape of the transfection complex from the compartments and dissociation of the complex. Therefore, when applied properly, L64 not only significantly increased polyethylenimine- and liposome-mediated transgene expression, but also decreased the cytotoxicity occasioned by transfection process. Our studies revealed the function and mechanism of neutral amphiphilic triblock copolymer as potent mediator for safe and efficient gene delivery.
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Affiliation(s)
- Jianlin Chen
- †Key Laboratory for Bio-Resource and Eco-Environment of Ministry Education, Key Laboratory for Animal Disease Prevention and Food Safety of Sichuan Province, College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China
- ‡National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, China
| | - Jing Luo
- †Key Laboratory for Bio-Resource and Eco-Environment of Ministry Education, Key Laboratory for Animal Disease Prevention and Food Safety of Sichuan Province, College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China
- ‡National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, China
| | - Ying Zhao
- §College of Acupuncture and Massage, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610075, China
| | - Linyu Pu
- ‡National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, China
| | - Xuejing Lu
- §College of Acupuncture and Massage, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 610075, China
| | - Rong Gao
- †Key Laboratory for Bio-Resource and Eco-Environment of Ministry Education, Key Laboratory for Animal Disease Prevention and Food Safety of Sichuan Province, College of Life Science, Sichuan University, Chengdu, Sichuan 610064, China
| | - Gang Wang
- ‡National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, China
| | - Zhongwei Gu
- ‡National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, Sichuan 610064, China
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18
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García Daza FA, Colville AJ, Mackie AD. Mean-field coarse-grained model for poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) triblock copolymer systems. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:3596-3604. [PMID: 25746687 DOI: 10.1021/la504884m] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The microscopic modeling of surfactant systems is of the utmost importance in understanding the mechanisms related to the micellization process because it allows for prediction and comparison with experimental data of diverse equilibrium system properties. In this work, we present a coarse-grained model for Pluronics, a trademarked type of triblock copolymer, from simulations based on a single-chain mean-field theory (SCMF). This microscopic model is used to quantify the micellization process of these nonionic surfactants at 37 °C and has been shown to be able to quantitatively reproduce experimental data of the critical micelle concentration (CMC) along with other equilibrium properties. In particular, these results correctly capture the experimental behavior with respect to the lengths of the hydrophobic and hydrophilic moieties of the surfactants for low and medium hydrophobicities. However, for the more highly hydrophobic systems with low CMCs, a deviation is found which has been previously attributed to nonequilibrium effects in the experimental data (Garcı́a Daza, F. A.; Mackie, A. D. Low Critical Micelle Concentration Discrepancy between Theory and Experiment. J. Phys. Chem. Lett. 2014, 5, 2027-2032).
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Affiliation(s)
- Fabián A García Daza
- †Departament d'Enginyeria Química, ETSEQ, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, 43007 Tarragona, Spain
| | - Alexander J Colville
- ‡Department of Chemical Engineering, Northeastern University, 360 Huntington Avenue, Boston, Massachusetts 02115-5000, United States
| | - Allan D Mackie
- †Departament d'Enginyeria Química, ETSEQ, Universitat Rovira i Virgili, Avinguda dels Països Catalans 26, 43007 Tarragona, Spain
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19
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Hamad MIK, Krause M, Wahle P. Improving AM ester calcium dye loading efficiency. J Neurosci Methods 2014; 240:48-60. [PMID: 25448382 DOI: 10.1016/j.jneumeth.2014.11.010] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2014] [Revised: 11/11/2014] [Accepted: 11/12/2014] [Indexed: 11/25/2022]
Abstract
BACKGROUND Calcium imaging has unraveled the calcium-dependent mechanisms underlying neuronal function. Acetoxymethyl ester (AM) dyes are widely employed for calcium imaging. Pluronic F127 (PF127) as a surfactant and dimethyl sulfoxide (DMSO) as a solvent are used to dissolve the dyes, but concentrations vary between protocols. How these substances affect loading efficiency is not well characterized. NEW METHOD We aimed to characterize dye loading in slice cultures. We determined minimum concentrations of surfactant, solvent and dye. The current study shows that the efficiency of AM dye loading depends on the initial stock concentration of PF127. Lowering the PF127 and DMSO concentrations can improve the loading efficiency. RESULTS Both, pluronic and DMSO are required for successful dye loading. However, dissolving the dyes in lower concentrations of PF127 yielded better staining efficiency. Moreover, lowering the DMSO concentration to ∼0.25% improves the efficiency. The strategy allows standard two-photon or confocal microscope monitoring of neuronal activity. The labeled cells display spontaneous and evoked calcium transients, and repetitive measurements for up to 24h after loading indicate that the method is not deleterious to neuronal function. COMPARISON WITH EXISTING METHOD(S) Dissolving the AM dyes in lower concentrations of PF127 combines the advantages of high loading efficiency, preserves cell viability and functional integrity, and allows repetitive measures over hours and days. Moreover, we found that the dye itself can be diluted to a final concentration of 1μM which reduces the experimental costs. CONCLUSION The method is optimal for calcium imaging in slice cultures.
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Affiliation(s)
- Mohammad I K Hamad
- AG Entwicklungsneurobiologie, Fakultät für Biologie, Ruhr Universität Bochum, D-44780 Bochum, Germany.
| | - Martin Krause
- Lehrstuhl für Allgemeine Zoologie und Neurobiologie, Ruhr Universität Bochum, D-44780 Bochum, Germany
| | - Petra Wahle
- AG Entwicklungsneurobiologie, Fakultät für Biologie, Ruhr Universität Bochum, D-44780 Bochum, Germany
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20
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Bouyon S, Roussel V, Fromes Y. SERCA2a gene therapy can improve symptomatic heart failure in δ-sarcoglycan-deficient animals. Hum Gene Ther 2014; 25:694-704. [PMID: 24645914 PMCID: PMC4137356 DOI: 10.1089/hum.2013.132] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Accepted: 03/18/2014] [Indexed: 11/13/2022] Open
Abstract
The loss of dystrophin or its associated proteins results in the development of muscle wasting frequently associated with cardiomyopathy. Contractile cardiac tissue is injured and replaced by fibrous tissue or fatty infiltrates, leading to a progressive decrease of the contractile force and finally to end-stage heart failure. At the time symptoms appear, restoration of a functional allele of the causative gene might not be sufficient to prevent disease progression. Alterations in Ca(2+) transport and intracellular calcium levels have been implicated in many types of pathological processes, especially in heart disease. On the basis of a gene transfer strategy, we analyzed the therapeutic efficacy of primary gene correction in a δ-sarcoglycan (δ-SG)-deficient animal model versus gene transfer of the Ca(2+) pump hSERCA2a (human sarco-endoplasmic reticulum calcium ATPase 2a), at a symptomatic stage of heart disease. Our results strongly suggest that restoration of δ-SG at this stage of disease will not lead to improved clinical outcome. However, restoration of proper Ca(2+) handling by means of amplifying SERCA2a expression in the myocardium can lead to functional improvement. Abnormalities in Ca(2+) handling play an important role in disease progression toward heart failure, and increased SERCA2a levels appear to significantly improve cardiac contraction and relaxation. Beneficial effects persist at least over a period of 6 months, and the evolution of cardiac functional parameters paralleled those of normal controls. Furthermore, we demonstrate that a plasmid formulation based on amphiphilic block copolymers can provide a safe and efficient platform for myocardial gene therapies. The use of synthetic formulations for myocardial gene transfer might thus overcome one of the major hurdles linked to viral vectors, that is, repeat administrations.
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Affiliation(s)
- Sophie Bouyon
- UPMC um76, INSERM u974, CNRS umr7215, Institut de Myologie, 75013 Paris, France
| | - Véronique Roussel
- UPMC um76, INSERM u974, CNRS umr7215, Institut de Myologie, 75013 Paris, France
| | - Yves Fromes
- UPMC um76, INSERM u974, CNRS umr7215, Institut de Myologie, 75013 Paris, France
- ONIRIS, Centre de Boisbonne, 44307 Nantes, France
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21
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Song H, Liu S, Li C, Geng Y, Wang G, Gu Z. Pluronic L64-mediated stable HIF-1α expression in muscle for therapeutic angiogenesis in mouse hindlimb ischemia. Int J Nanomedicine 2014; 9:3439-52. [PMID: 25092975 PMCID: PMC4113404 DOI: 10.2147/ijn.s65353] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022] Open
Abstract
Intramuscular injection of plasmid DNA (pDNA) to express a therapeutic protein is a promising method for the treatment of many diseases. However, the therapeutic applications are usually hindered by gene delivery efficiency and expression level. In this study, critical factors in a pDNA-based gene therapy system, such as gene delivery materials, a therapeutic gene, and its regulatory elements, were optimized to establish an integrated system for the treatment of mouse hindlimb ischemia. The results showed that Pluronic® L64 (L64) was an efficient and safe material for gene delivery into mouse skeletal muscle. It also showed intrinsic ability to promote in vivo angiogenesis in a concentration-dependent manner, which might be through the activation of nuclear factor kappa-light-chain-enhancer of activated B cell (NF-κB)-regulated angiogenic factors. The combination of 0.1% L64 with a hybrid gene promoter (pSC) increased the gene expression level, elongated the gene expression duration, and enhanced the number of transfected muscle fibers. In mice ischemic limbs, a gene medicine (pSC-HIF1αtri/L64) composed of L64 and pSC-based expression plasmid encoding hypoxia-inducible factor 1-alpha triple mutant (HIF-1αtri), improved the expression of stable HIF-1α, and in turn, the expression of multiple angiogenic factors. As a result, the ischemic limbs showed accelerated function recovery, reduced foot necrosis, faster blood reperfusion, and higher capillary density. These results indicated that the pSC-HIF1αtri/L64 combination presented a potential and convenient venue for the treatment of peripheral vascular diseases, especially critical limb ischemia.
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Affiliation(s)
- Hongmei Song
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, People's Republic of China
| | - Sijia Liu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, People's Republic of China
| | - Caixia Li
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, People's Republic of China ; Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu, People's Republic of China
| | - Yanyan Geng
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, People's Republic of China ; Hebei University of Engineering, Handan, Hebei, People's Republic of China
| | - Gang Wang
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, People's Republic of China
| | - Zhongwei Gu
- National Engineering Research Center for Biomaterials, Sichuan University, Chengdu, People's Republic of China
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Mahindhoratep S, Bouda HA, El Shafey N, Scherman D, Kichler A, Pichon C, Midoux P, Mignet N, Bureau MF. NF-kB related transgene expression in mouse tibial cranial muscle after pDNA injection followed or not by electrotransfer. Biochim Biophys Acta Gen Subj 2014; 1840:3257-63. [PMID: 24973564 DOI: 10.1016/j.bbagen.2014.06.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2014] [Revised: 05/28/2014] [Accepted: 06/18/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND When activated, NF-κB can promote the nuclear import and transcription of DNA possessing NF-κB consensus sequences. Here, we investigated whether NF-κB is involved in the plasmid electrotransfer process. METHODS Mouse tibial cranial muscles were transfected with plasmids encoding luciferase bearing or not NF-κB consensus sequences. Luciferase transgene expression was evaluated noninvasively by luminescence imaging and the number of pDNA copies in the same muscles by qPCR. RT-PCR of heat shock protein HsP70 mRNA evidenced cell stress. Western blots of phosphorylated IkBα were studied as a marker of NF-κB activation. RESULTS Intra-muscular injection of a plasmid bearing a weak TATA-like promoter results in a very low muscle transfection level. Electrotransfer significantly increased both the number of pDNA copy and the transgene expression of this plasmid per DNA copy. Insertion of NF-κB consensus sequences into pDNA significantly increased the level of gene expression both with and without electrotransfer. Electrotransfer-induced cellular stress was evidenced by increased HsP70 mRNA. Phosphorylated IκBα was slightly increased by simple pDNA injection and a little more by electrotransfer. We also observed a basal level of phosphorylated IκBα and thus of free NF-κB in the absence of any stimulation. GENERAL SIGNIFICANCE pDNA electrotransfer can increase transgene expression independently of NF-κB. The insertion of NF-κB consensus sequences into pDNA bearing a weak TATA-like promoter leads to enhanced transgene expression in muscle with or without gene electrotransfer. Finally, our results suggest that the basal amount of free NF-κB in muscle might be sufficient to enhance the activity of pDNA bearing NF-κB consensus sequences.
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Affiliation(s)
- S Mahindhoratep
- U1022 INSERM, UMR8258 CNRS, Unité de Technologies Chimiques et Biologiques pour la Santé, Chimie ParisTech, Faculté de Pharmacie, 4 Avenue de l'Observatoire, 75006 Paris, France
| | - H Ait Bouda
- U1022 INSERM, UMR8258 CNRS, Unité de Technologies Chimiques et Biologiques pour la Santé, Chimie ParisTech, Faculté de Pharmacie, 4 Avenue de l'Observatoire, 75006 Paris, France
| | - Nelly El Shafey
- U1022 INSERM, UMR8258 CNRS, Unité de Technologies Chimiques et Biologiques pour la Santé, Chimie ParisTech, Faculté de Pharmacie, 4 Avenue de l'Observatoire, 75006 Paris, France
| | - D Scherman
- U1022 INSERM, UMR8258 CNRS, Unité de Technologies Chimiques et Biologiques pour la Santé, Chimie ParisTech, Faculté de Pharmacie, 4 Avenue de l'Observatoire, 75006 Paris, France
| | - A Kichler
- V-SAT, UMR7199 CNRS, Université de Strasbourg, Faculté de Pharmacie, 67401 Illkirch Cedex, France
| | - Ch Pichon
- UPR4301 CNRS, rue Charles Sadron, 45071 Orléans Cedex 02, France
| | - P Midoux
- UPR4301 CNRS, rue Charles Sadron, 45071 Orléans Cedex 02, France
| | - N Mignet
- U1022 INSERM, UMR8258 CNRS, Unité de Technologies Chimiques et Biologiques pour la Santé, Chimie ParisTech, Faculté de Pharmacie, 4 Avenue de l'Observatoire, 75006 Paris, France
| | - M F Bureau
- U1022 INSERM, UMR8258 CNRS, Unité de Technologies Chimiques et Biologiques pour la Santé, Chimie ParisTech, Faculté de Pharmacie, 4 Avenue de l'Observatoire, 75006 Paris, France
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Zhang J, Sen A, Cho E, Lee JS, Webb K. Poloxamine/fibrin hybrid hydrogels for non-viral gene delivery. J Tissue Eng Regen Med 2014; 11:246-255. [PMID: 24889259 DOI: 10.1002/term.1906] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2013] [Revised: 01/06/2014] [Accepted: 04/20/2014] [Indexed: 11/10/2022]
Abstract
Hydrogels have been widely investigated for localized, sustained gene delivery because of the similarity of their physical properties to native extracellular matrix and their ability to be formed under mild conditions amenable to the incorporation of bioactive molecules. The objective of this study was to develop bioactive hydrogels composed of macromolecules capable of enhancing the efficiency of non-viral vectors. Hybrid hydrogels were prepared by simultaneous enzymatic and Michael-type addition crosslinking of reduced fibrinogen and an acrylated amphiphilic block copolymer, Tetronic T904, in the presence of dithiothreitol (DTT) and thrombin. T904/fibrin hydrogels degraded by surface erosion in the presence of plasmin and provided sustained release of polyplex vectors up to an order of magnitude longer than pure fibrin gel control. In addition, the rate of gel degradation and time-course of polyplex vector release were readily controlled by varying the T904/fibrinogen ratio in the gel composition. When added to transfected neuroblastoma (N2A) cells, both native T904 itself and hydrogel degradation products significantly increased polyplex transfection efficiency with minimal effect on cell viability. To evaluate gel-based transfection, N2A cells encapsulated in small fibrin clusters were covered by or suspended within polyplex-loaded hydrogels. Cells progressively degraded and invaded the hybrid hydrogels, exhibiting increasing gene expression over 2 weeks and then diminishing but persistent gene expression for over 1 month. In conclusion, these results demonstrate that T904/fibrin hybrid hydrogels can be promising tissue engineering scaffolds that provide local, controlled release of non-viral vectors in combination with the generation of bioactive gel degradation products that actively enhance vector efficiency. Copyright © 2014 John Wiley & Sons, Ltd.
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Affiliation(s)
- Jeremy Zhang
- Microenvironmental Engineering Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - Atanu Sen
- Microenvironmental Engineering Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - Eunhee Cho
- Microenvironmental Engineering Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA.,St Jude Medical, St Paul, MN, USA
| | - Jeoung Soo Lee
- Microenvironmental Engineering Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
| | - Ken Webb
- Microenvironmental Engineering Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
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Zhang J, Bae S, Lee JS, Webb K. Efficacy and mechanism of poloxamine-assisted polyplex transfection. J Gene Med 2014; 15:271-81. [PMID: 23813893 DOI: 10.1002/jgm.2719] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 06/10/2013] [Accepted: 06/24/2013] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND Amphiphilic block copolymers acting as biological response modifiers provide an attractive approach for improving the transfection efficiency of polycationic polymer/DNA complexes (polyplexes) by altering cellular processes crucial for efficient transgene expression. METHODS The present study aimed to investigate the effect of the poloxamine Tetronic T904, a four-arm polyethylene oxide/polypropylene oxide block copolymer, on polyplex transfection and to determine its mechanism of action by analyzing the cellular uptake of polyplex, the nuclear localization of plasmid and RNA transcript production. RESULTS T904 significantly increased the transfection efficiency of polyplexes based on 25-kDa branched polyethylenimine in a dose-dependent manner in the presence of serum in C6 glioma cells, as well as human fibroblasts and mesenchymal stem cells. The activity of T904 was not promoter-dependent, increasing the expression of reporter genes under both cytomegalovirus and SV40 promoters. Although T904 did not affect the internalization or nuclear uptake of plasmid, mRNA expression levels from both promoters showed dose-dependent increases that closely paralleled increases in gene expression. CONCLUSIONS The present study demonstrates that T904 significantly increases polyplex transfection efficiency and suggests a mechanism of increased transcriptional activity. As a four-arm, hydroxyl-terminated polymer, T904 is amenable to a variety of end group functionalization and covalent cross-linking strategies that have been developed for preparing hydrogels from multi-arm polyethylene glycol, making it particularly attractive for scaffold-mediated gene delivery.
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Affiliation(s)
- Jeremy Zhang
- Microenvironmental Engineering Laboratory, Department of Bioengineering, Clemson University, Clemson, SC, USA
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25
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Nawaz S, Carbone P. Coarse-graining poly(ethylene oxide)-poly(propylene oxide)-poly(ethylene oxide) (PEO-PPO-PEO) block copolymers using the MARTINI force field. J Phys Chem B 2014; 118:1648-59. [PMID: 24446682 DOI: 10.1021/jp4092249] [Citation(s) in RCA: 63] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The MARTINI coarse-grain (CG) force field is extended for a class of triblock block copolymers known as Pluronics. Existing MARTINI bead types are used to model the non-bonded part of the potential while single chain properties for both homopolymers, poly(ethylene oxide) (PEO) and poly(propylene oxide) (PPO), are used to develop the bonded interactions. The new set of force field parameters reproduces structural and dynamical properties of high molecular weight homo- and copolymers. The CG model is moderately transferable in solvents of different polarity and concentration; however, the PEO homopolymer model presents a reduced thermodynamic transferability especially in water probably due to the lack of hydrogen bonds with the solvent. Our simulations of a monolayer of Pluronic L44 show polymer-brush-like characteristics for the PEO segments which protrude into the aqueous phase. Other membrane properties not easily accessible using experimental techniques such as its membrane thickness are also calculated.
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Affiliation(s)
- Selina Nawaz
- School of Chemical Engineering and Analytical Science, The University of Manchester , Oxford Road, Manchester, M13 9PL, United Kingdom
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26
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Wang M, Wu B, Lu P, Tucker JD, Milazi S, Shah SN, Lu QL. Pluronic-PEI copolymers enhance exon-skipping of 2'-O-methyl phosphorothioate oligonucleotide in cell culture and dystrophic mdx mice. Gene Ther 2013; 21:52-9. [PMID: 24131982 DOI: 10.1038/gt.2013.57] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 08/30/2013] [Accepted: 09/16/2013] [Indexed: 11/09/2022]
Abstract
A series of small-size polyethylenimine (PEI)-conjugated pluronic polycarbamates (PCMs) have been investigated for the ability to modulate the delivery of 2'-O-methyl phosphorothioate RNA (2'-OMePS) in vitro and in dystrophic mdx mice. The PCMs retain strong binding capacity to negatively charged oligomer as demonstrated by agarose gel retardation assay, with the formation of condensed polymer/oligomer complexes at a wide-range weight ratio from 1:1 to 20:1. The condensed polymer/oligomer complexes form 100-300 nm nanoparticles. Exon-skipping effect of 2'-OMePS was dramatically enhanced with the use of the most effective PCMs in comparison with 2'-OMePS alone in both cell culture and in vivo, respectively. More importantly, the effective PCMs, especially those composed of moderate size (2k-5kDa) and intermediate hydrophilic-lipophilic balance (7-23) of pluronics, enhanced exon-skipping of 2'-OMePS with low toxicity as compared with Lipofectamine-2000 in vitro or PEI 25k in vivo. The variability of individual PCM for delivery of antisense oligomer and plasmid DNA indicate the complexity of interaction between polymer and their cargos. Our data demonstrate the potential of PCMs to mediate delivery of modified antisense oligonucleotides to the muscle for treating muscular dystrophy or other appropriate myodegenerative diseases.
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Affiliation(s)
- M Wang
- Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA
| | - B Wu
- Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA
| | - P Lu
- Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA
| | - J D Tucker
- 1] Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA [2] Department of Biology, University of North Carolina, Charlotte, NC, USA
| | - S Milazi
- Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA
| | - S N Shah
- Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA
| | - Q L Lu
- Department of Neurology, McColl Lockwood Laboratory for Muscular Dystrophy Research, Neuromuscular/ALS Center, Carolinas Medical Center, Charlotte, NC, USA
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Qin L, Sun Y, Liu P, Wang Q, Han B, Duan Y. F127/Calcium phosphate hybrid nanoparticles: a promising vector for improving siRNA delivery and gene silencing. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2013; 24:1757-66. [PMID: 23746331 DOI: 10.1080/09205063.2013.801702] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Calcium phosphate-based transfection method had been used to transfer DNA into living cells. However, it had so far not been studied in detail to what extend siRNA delivery system. In this study, Pluronic F127/calcium phosphate hybrid nanoparticles (F127/CaP) were prepared by a facile room temperature method and employed as carriers to deliver siRNA to silence tumor cell. The morphology of the F127/CaP hybrid nanoparticles was investigated with TEM. In order to determine the ratio of F127 to CaP in the hybrid nanoparticles, TGA (the thermogravimetric analysis) was applied. MTT assays confirmed that the F127/CaP hybrid nanoparticles were quite safe. The hybrid F127/CaP nanoparticles obtained were 120-210 nm in diameter, and they were applied as siRNA carriers for siRNA loading and in vitro transfection. The siRNA encapsulating efficiency was 91.5 wt.% with a loading content of 6.5 wt.%. Compared to traditional CaP transfection method, the siRNA-loaded F127/CaP exhibited higher gene inhibition efficiency, and this was supported by fluorescence microscopy. Quantitative analysis of GFP silencing efficiency of various siRNA formulations was measured by using FACS flow cytometry analysis. Additionally, both custom CaP and F127/CaP are biocompatible and biodegradable, thus the as-prepared F127/CaP hybrid nanoparticles are promising for siRNA delivery.
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Affiliation(s)
- Liubin Qin
- a School of Medicine , Shanghai Cancer Institute, Renji Hospital, Shanghai Jiao Tong University , Shanghai , 200032 , China
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29
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Bédard AC, Collins SK. Influence of Poly(ethylene glycol) Structure in Catalytic Macrocyclization Reactions. ACS Catal 2013. [DOI: 10.1021/cs400050g] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Affiliation(s)
- Anne-Catherine Bédard
- Département de Chimie, Centre
for Green Chemistry and Catalysis, Université de Montréal, CP 6128 Station Downtown, Montréal,
Québec H3C 3J7, Canada
| | - Shawn K. Collins
- Département de Chimie, Centre
for Green Chemistry and Catalysis, Université de Montréal, CP 6128 Station Downtown, Montréal,
Québec H3C 3J7, Canada
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Sun J, Luo T, Sheng R, Li H, Chen S, Hu F, Cao A. Preparation of functional water-soluble low-cytotoxic poly(methacrylate)s with pendant cationic L-lysines for efficient gene delivery. Macromol Biosci 2012; 13:35-47. [PMID: 23225764 DOI: 10.1002/mabi.201200304] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2012] [Revised: 09/25/2012] [Indexed: 01/01/2023]
Abstract
In this work, we present the preparation of water-soluble poly(methacrylate)s with pendant cationic L-lysines PHMLs(6-30 K). Plasmid DNA binding affinity as well as particle sizes and zeta potentials of the polyplexes were examined for these PHML vectors, and their cytotoxicities were assayed with HeLa cells by CCK-8 and lactate dehydrogenase kits. Gene transfection efficacy and intracellular uptake of the polyplexes by the PHML vectors were also studied with HeLa cells. As a result, it was revealed that the low cytotoxic PHMLs tended to exhibit gene transfection efficiencies significantly higher than those of the linear structural PLL (15-30 K) control, in particular the molecular weight of a PHML vector remarkably influenced its pDNA binding affinity, transfection efficacy and intracellular uptake of the polyplexes.
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Affiliation(s)
- Jingjing Sun
- Laboratory for Polymer Materials, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 345 Lingling Road, Shanghai 200032, China
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31
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Polyethylenimine-modified pluronics (PCMs) improve morpholino oligomer delivery in cell culture and dystrophic mdx mice. Mol Ther 2012; 21:210-6. [PMID: 23164938 DOI: 10.1038/mt.2012.236] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
We investigated a series of small-sized polyethylenimine (PEI, 0.8/1.2 k)-conjugated pluronic copolymers (PCMs) for their potential to enhance delivery of an antisense phosphorodiamidate morpholino oligomer (PMO) in vitro and in dystrophic mdx mice. PCM polymers containing pluronics of molecular weight (Mw) ranging 2-6 k, with hydrophilic-lipophilic balance (HLB) 7-23, significantly enhanced PMO-induced exon-skipping in a green fluorescent protein (GFP) reporter-based myoblast culture system. Application of optimized formulations of PCMs with PMO targeted to dystrophin exon 23 demonstrated a significant increase in exon-skipping efficiency in dystrophic mdx mice. Consistent with our observations in vitro, optimization of molecular size and the HLB of pluronics are important factors for PCMs to achieve enhanced PMO delivery in vivo. Observed cytotoxicity of the PCMs was lower than Endo-porter and PEI 25 k. Tissue toxicity of PCMs in muscle was not clearly detected with the concentrations used, indicating the potential of the PCMs as effective and safe PMO carriers for treating diseases such as muscular dystrophy.
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32
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Chen F, Zhang Z, Cai M, Zhang X, Zhong Z, Zhuo R. Phenylboronic-acid-modified amphiphilic polyether as a neutral gene vector. Macromol Biosci 2012; 12:962-9. [PMID: 22517671 DOI: 10.1002/mabi.201100524] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Revised: 03/01/2012] [Indexed: 11/08/2022]
Abstract
A phenylboronic-acid-modified amphiphilic block polyether is prepared via reaction of polyglycidol-block-poly(ethylene oxide)-block-poly(propylene oxide)-block-poly(ethylene oxide)-block-polyglycidol (Pluronic-PG) with 2-(N,N-dimethylaminomethyl)-5-aminomethyl phenylboronic acid using phosgene as a coupling reagent. The boronic-acid-modified non-cationic polymer binds plasmid pGL3 effectively, forms sub-µm polymer/DNA complex particles, and greatly facilitates the cell uptake of the plasmid. The efficiency of the polymer as a gene vector is evaluated in vitro by transfection of pGL3 to HeLa, COS-7 and HepG2 cells. Pluronic-PG-BA enhances the transfection efficiency by 100 to 1000 times compared with Pluronic-PG. The presence of serum does not significantly affect the transfection efficiency.
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Affiliation(s)
- Fujie Chen
- Key Laboratory of Biomedical Polymers of Ministry of Education, Department of Chemistry, Wuhan University, Wuhan 430072, China
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33
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Relationship between the Affinity of PEO-PPO-PEO Block Copolymers for Biological Membranes and Their Cellular Effects. Pharm Res 2012; 29:1908-18. [DOI: 10.1007/s11095-012-0716-6] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Accepted: 02/20/2012] [Indexed: 11/26/2022]
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Liang W, Gong H, Yin D, Lu S, Fu Q. High-molecular-weight polyethyleneimine conjuncted pluronic for gene transfer agents. Chem Pharm Bull (Tokyo) 2012; 59:1094-101. [PMID: 21881251 DOI: 10.1248/cpb.59.1094] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In order to enhance the gene delivery efficiency and decrease cytotoxicity of polyplexes, copolymers consisting of branched polyethyleneimine (PEI) 25 kDa grafted with Pluronic (F127, F68, P105) were successfully synthesized using a simple two-step procedure. The copolymers were tested for cytotoxicity and DNA condensation and complexation properties. Their polyplexes with plasmid DNA were characterized in terms of DNA size and surface charge and transfection efficiency. The complex sizes were below 300 nm, which implicated their potential for intracellular delivery. The Pluronic-g-PEI exhibited better condensation and complexation properties than PEI 25 kDa. The cytotoxicity of PEI was strongly reduced after copolymerization. The Pluronic-g-PEI showed lower cytotoxicity in three different cell lines (Hela, MCF-7, and HepG2) than PEI 25 kDa. pGL3-lus was used as a reporter gene, and the transfection efficiency was in vitro measured in HeLa cells. Compared with unmodified PEI 25 kDa Pluronic-g-PEI showed much higher transfection efficiency. These results demonstrate that polyplexes prepared using a combined strategy of surface crosslinking and grafted with Pluronic seem to provide promising properties as stable, high transfection efficiency vectors.
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Affiliation(s)
- Wenqing Liang
- Department of Orthopaedics, Shaoxing People's Hospital, China
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35
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Wang M, Lu P, Wu B, Tucker JD, Cloer C, Lu Q. High efficiency and low toxicity of polyethyleneimine modified Pluronics (PEI–Pluronic) as gene delivery carriers in cell culture and dystrophic mdx mice. ACTA ACUST UNITED AC 2012. [DOI: 10.1039/c2jm15625c] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
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Lai TC, Kataoka K, Kwon GS. Pluronic-based cationic block copolymer for forming pDNA polyplexes with enhanced cellular uptake and improved transfection efficiency. Biomaterials 2011; 32:4594-603. [PMID: 21453964 DOI: 10.1016/j.biomaterials.2011.02.065] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2011] [Accepted: 02/24/2011] [Indexed: 01/11/2023]
Abstract
PEGylated cationic polymers have been extensively studied for substituting virus as gene delivery vehicles. These polymers can produce water-soluble polyionic complexes (polyplexes) with plasmid DNA (pDNA) and show enhanced stability compared to non-PEGylated polyplexes. However, PEGylation always diminishes the transfection efficiency of polyplexes probably due to poor cellular internalization of the particles and difficulty in releasing the pDNA cargo from the complexes intracellularly for gene expression. As non-ionic surfactants, Pluronic block copolymers have been shown to interact with plasma membrane and promote cellular uptake of various small molecules and biomacromolecules. To evaluate whether Pluronic could improve the transfection efficiency of polyplexes, Pluronic P85- and PEG-based cationomers comprising poly{N-[N-(2-aminoethyl)-2-aminoethyl] aspartamide (P[Asp(DET)]) cationic blocks were synthesized and tested for their transfection ability. In this study, it was demonstrated that although the stability of the PEG-based polyplexes was better than that of the P85-based polyplexes based cationic polymers, the P85-based polyplex could achieve significantly higher transfection than the PEG counterparts. The improvement of gene delivering ability was shown to be correlated with the enhanced cellular internalization of the P85-based polyplexes.
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Affiliation(s)
- Tsz Chung Lai
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Wisconsin-Madison, Madison, WI 53705-2222, USA
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Chen YC, Jiang LP, Liu NX, Wang ZH, Hong K, Zhang QP. P85, Optison microbubbles and ultrasound cooperate in mediating plasmid DNA transfection in mouse skeletal muscles in vivo. ULTRASONICS SONOCHEMISTRY 2011; 18:513-519. [PMID: 20863738 DOI: 10.1016/j.ultsonch.2010.08.013] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2010] [Revised: 08/22/2010] [Accepted: 08/31/2010] [Indexed: 05/29/2023]
Abstract
Pluronic block copolymers, a kind of non-ionic surfactant, also known as poloxamers, and ultrasound-targeted microbubble destruction have been respectively investigated as vectors for gene delivery in vitro and in vivo. However, they are limited for clinical application due to the relatively low transfer efficiency of each individual vector. In the present study, we explored if the combination of P85, a pluronic block copolymer, Optison, a microbubble contrast agent and ultrasound enhances the transfection of plasmid DNA in vivo using mouse skeletal muscle models. Plasmid encoding green fluorescent protein (GFP) was respectively conjugated with 0.05%P85, 10%Optison, or 0.05%P85 plus 10%Optison, and injected into mouse tibialis anterior (TA) muscles with or without ultrasound irradiation (1 MHz, 1 W/cm(2), 2 min and 20% duty cycle). Mice were sacrificed 1 week after injection. The TA muscles were collected and cryo-sectioned into a series of 7 μm slices. To assess the efficiency of plasmid DNA transfection, tissue sections were counterstained with DAPI and scored by counting the number of GFP-positive fibers. Meanwhile the area of damaged muscles was measured based on the tissues stained with hematoxylin and eosin. Both P85 and Optison significantly enhanced the delivery of plasmid DNA in mouse TA skeletal muscles (P<0.01 and P<0.05 respectively, compared to saline control). In combination with Ultrasound irradiation, P85 (P<0.01, compared to P85 alone) but not Optison (P>0.05, compared to Optison alone) exerted a more pronounced effect on the transfection efficiency. Furthermore P85-induced gene delivery was higher than that by Optison regardless of the presence of ultrasound (P<0.01). The highest transfection efficiency was observed when P85, Optison and ultrasound irradiation were administrated together (P<0.01, compared to any other treatment in this study). The area of damaged muscles was enlarged by ultrasound irradiation in the presence of Optison microbubbles (P<0.01, compared to those groups without ultrasound irradiation). These results suggest that P85, microbubbles and ultrasound irradiation synergistically enhance plasmid DNA delivery in mouse skeletal muscles in vivo.
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Affiliation(s)
- Yun-Chao Chen
- Ultrasound Department, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China.
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Guiraud S, Alimi-Guez D, van Wittenberghe L, Scherman D, Kichler A. The reverse block copolymer Pluronic 25R2 promotes DNA transfection of skeletal muscle. Macromol Biosci 2011; 11:590-4. [PMID: 21337518 DOI: 10.1002/mabi.201000463] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Indexed: 11/06/2022]
Abstract
Muscle is an important and attractive target for gene therapy. Recent findings have shown that neutral amphiphilic triblock copolymers with a PEO-PPO-PEO arrangement significantly increase muscle transfection as compared to naked DNA. We were interested in evaluating whether reverse Pluronics (PPO-PEO-PPO) also possess transfection properties. Therefore, we measured the in vitro and in vivo transfection activity of 25R2 and 25R4, two copolymers that differ by their hydrophilic/hydrophobic balance. The results show that 25R2 significantly increases the transfection level in muscle compared to naked DNA. Taken together, this work demonstrates that the reverse Pluronic 25R2 possesses interesting properties for in vivo transfection.
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Chen YC, Jiang LP, Liu NX, Ding L, Liu XL, Wang ZH, Hong K, Zhang QP. Enhanced Gene Transduction into Skeletal Muscle of Mice In Vivo with Pluronic Block Copolymers and Ultrasound Exposure. Cell Biochem Biophys 2011; 60:267-73. [DOI: 10.1007/s12013-010-9149-1] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Won YW, Lim KS, Kim YH. Intracellular organelle-targeted non-viral gene delivery systems. J Control Release 2011; 152:99-109. [PMID: 21255626 DOI: 10.1016/j.jconrel.2011.01.013] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2010] [Revised: 12/30/2010] [Accepted: 01/07/2011] [Indexed: 10/18/2022]
Abstract
Gene therapy is a rapidly growing approach for the treatment of various diseases. To achieve successful gene therapy, a gene delivery system is necessary to overcome several barriers in the extracellular and intracellular spaces. Polymers, peptides, liposomes and nanoparticles developed as gene carriers have achieved efficient cellular uptake of genes. Among these carriers, cationic polymers and peptides have been further developed as intracellular organelle-targeted delivery systems. The cytoplasm, nucleus and mitochondria have been considered primary targets for gene delivery using targeting moieties or environment-responsive materials. In this review, we explore recently developed non-viral gene carriers based on reducible systems specialized to target the cytoplasm, nucleus and mitochondria.
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Affiliation(s)
- Young-Wook Won
- Department of Bioengineering, Institute for Bioengineering and Biopharmaceutical Research, and Institute of Aging Society, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, Republic of Korea
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Parra FJ, Rodríguez-Alonsob L, Marinich J, Herrero-Vanrell R, Fernández-Gutiérreza M, Vázquez B, Román JS. Random co-polymers based on the poloxamer Bayfit® 10WF15 for biomedical applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2010; 22:1895-916. [PMID: 20961494 DOI: 10.1163/092050610x529146] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Random co-polymers were prepared from the poloxamer Bayfit(®) 10WF15 and their thermal and biological properties analyzed. The poloxamer was characterized, functionalized with methacrylate groups (Bayfit-MA) and further co-polymerized with 2-hydroxyethyl methacrylate (HEMA) with Bayfit-MA feed contents of 1, 5 and 10 wt%. Co-polymers were partially soluble in organic solvents and exhibited a single glass transition temperature indicative of a random monomer distribution in the macromolecular chains. In thermogravimetric studies the co-polymers showed two degradation stages, around 210 and 350 °C, respectively. The thermosensitive behaviour of the poloxamer was studied by turbidimetry. Cloud point temperatures of aqueous solutions of Bayfit(®) 10WF15 (0.5-5 wt%) ranged from 15 to 18 °C and for Bayfit(®) 10WF15 methacrylate (0.5-1 wt%) from 6 to 7 °C. DSC thermograms of hydrated co-polymers showed the typical endothermic peaks with phase transition temperatures close to that of physiological medium. The biocompatibility of initial poloxamer and derivatives was analyzed with human fibroblasts cultures. The IC(50) value of Bayfit(®) 10WF15 was 1.4 mg/ml. Cellular extracts of the co-polymers were not cytotoxic and cellular proliferation and DNA content depended on co-polymer composition.
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Affiliation(s)
- F J Parra
- Institute of Polymer Science and Technology, CSIC, C/Juan de la Cierva 3, 28006 Madrid, Spain
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Chèvre R, Le Bihan O, Beilvert F, Chatin B, Barteau B, Mével M, Lambert O, Pitard B. Amphiphilic block copolymers enhance the cellular uptake of DNA molecules through a facilitated plasma membrane transport. Nucleic Acids Res 2010; 39:1610-22. [PMID: 20952409 PMCID: PMC3045598 DOI: 10.1093/nar/gkq922] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Amphiphilic block copolymers have been developed recently for their efficient, in vivo transfection activities in various tissues. Surprisingly, we observed that amphiphilic block copolymers such as Lutrol® do not allow the transfection of cultured cells in vitro, suggesting that the cell environment is strongly involved in their mechanism of action. In an in vitro model mimicking the in vivo situation we showed that pre-treatment of cells with Lutrol®, prior to their incubation with DNA molecules in the presence of cationic lipid, resulted in higher levels of reporter gene expression. We also showed that this improvement in transfection efficiency associated with the presence of Lutrol® was observed irrespective of the plasmid promoter. Considering the various steps that could be improved by Lutrol®, we concluded that the nucleic acids molecule internalization step is the most important barrier affected by Lutrol®. Microscopic examination of transfected cells pre-treated with Lutrol® confirmed that more plasmid DNA copies were internalized. Absence of cationic lipid did not impair Lutrol®-mediated DNA internalization, but critically impaired endosomal escape. Our results strongly suggest that in vivo, Lutrol® improves transfection by a physicochemical mechanism, leading to cellular uptake enhancement through a direct delivery into the cytoplasm, and not via endosomal pathways.
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Affiliation(s)
- Raphaël Chèvre
- INSERM, U915, l'institut du thorax, Nantes, F-44000, France
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Wasungu L, Marty AL, Bureau MF, Kichler A, Bessodes M, Teissie J, Scherman D, Rols MP, Mignet N. Pre-treatment of cells with pluronic L64 increases DNA transfection mediated by electrotransfer. J Control Release 2010; 149:117-25. [PMID: 20888380 DOI: 10.1016/j.jconrel.2010.09.022] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2010] [Revised: 09/21/2010] [Accepted: 09/24/2010] [Indexed: 11/26/2022]
Abstract
Gene transfer into muscle cells is a key issue in biomedical research. Indeed, it is important for the development of new therapy for many genetic disorders affecting this tissue and for the use of muscle tissue as a secretion platform of therapeutic proteins. Electrotransfer is a promising method to achieve gene expression in muscles. However, this method can lead to some tissue damage especially on pathologic muscles. Therefore there is a need for the development of new and less deleterious methods. Triblock copolymers as pluronic L64 are starting to be used to improve gene transfer mediated by several agents into muscle tissue. Their mechanism of action is still under investigation. The combination of electrotransfer and triblock copolymers, in allowing softening electric field conditions leading to efficient DNA transfection, could potentially represent a milder and more secure transfection method. In the present study, we addressed the possible synergy that could be obtained by combining the copolymer triblock L64 and electroporation. We have found that a pre-treatment of cells with L64 could improve the transfection efficiency. This pre-treatment was shown to increase cell viability and this is partly responsible for the improvement of transfection efficiency. We have then labelled the plasmid DNA and the pluronic L64 in order to gain some insights into the mechanism of transfection of the combined physical and chemical methods. These experiences allowed us to exclude an action of L64 either on membrane permeabilization or on DNA/membrane interaction. Using plasmids containing or not binding sequences for NF-κB and an inhibitor of NF-κB pathway activation we have shown that this beneficial effect was rather related to the NF-κB signalling pathway, as it is described for other pluronics. Finally we address here some mechanistic issues on electrically mediated transfection, L64 mediated membrane permeabilization and the combination of both for gene transfer.
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Affiliation(s)
- L Wasungu
- CNRS, IPBS (Institut de Pharmacologie et de Biologie Structurale), 205 route de Narbonne, F-31077 Toulouse, France
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Sahay G, Alakhova DY, Kabanov AV. Endocytosis of nanomedicines. J Control Release 2010; 145:182-95. [PMID: 20226220 PMCID: PMC2902597 DOI: 10.1016/j.jconrel.2010.01.036] [Citation(s) in RCA: 1481] [Impact Index Per Article: 105.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/18/2009] [Accepted: 01/21/2010] [Indexed: 02/07/2023]
Abstract
Novel nanomaterials are being developed to improve diagnosis and therapy of diseases through effective delivery of drugs, biopharmaceutical molecules and imaging agents to target cells in disease sites. Such diagnostic and therapeutic nanomaterials, also termed "nanomedicines", often require site-specific cellular entry to deliver their payload to sub-cellular locations hidden beneath cell membranes. Nanomedicines can employ multiple pathways for cellular entry, which are currently insufficiently understood. This review, first, classifies various mechanisms of endocytosis available to nanomedicines including phagocytosis and pinocytosis through clathrin-dependent and clathrin-independent pathways. Second, it describes the current experimental tools to study endocytosis of nanomedicines. Third, it provides specific examples from recent literature and our own work on endocytosis of nanomedicines. Finally, these examples are used to ascertain 1) the role of particle size, shape, material composition, surface chemistry and/or charge for utilization of a selected pathway(s); 2) the effect of cell type on the processing of nanomedicines; and 3) the effect of nanomaterial-cell interactions on the processes of endocytosis, the fate of the nanomedicines and the resulting cellular responses. This review will be useful to a diverse audience of students and scientists who are interested in understanding endocytosis of nanomedicines.
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Affiliation(s)
- Gaurav Sahay
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830
| | - Daria Y Alakhova
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830
| | - Alexander V Kabanov
- Department of Pharmaceutical Sciences and Center for Drug Delivery and Nanomedicine, College of Pharmacy, University of Nebraska Medical Center, Omaha, NE 68198-5830
- Faculty of Chemistry, M.V. Lomonosov Moscow State University, 119899 Moscow, Russia
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Alimi-Guez D, Leborgne C, Pembouong G, Van Wittenberghe L, Mignet N, Scherman D, Kichler A. Evaluation of the muscle gene transfer activity of a series of amphiphilic triblock copolymers. J Gene Med 2010; 11:1114-24. [PMID: 19757455 DOI: 10.1002/jgm.1396] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Amphiphilic triblock copolymers such as the polyethylene oxide-polypropylene oxide-polyethylene oxide L64 (PEO(13)-PPO(30)-PEO(13)) significantly increase transgene expression after injection of DNA/polymer mixtures into skeletal muscles. To better understand the way such copolymers act, we studied the behaviour of different poloxamers, including L64, both in vitro and in vivo. METHODS The in vitro and in vivo transfection activity of five copolymers that differ either by their molecular weight or by their hydrophilic/hydrophobic balance was evaluated. Furthermore, we also studied the membrane permeabilizing properties of the poloxamers. RESULTS The results obtained indicate that, after intramuscular administration of DNA/poloxamer formulations, all five compounds were able to significantly increase the expression levels of luciferase compared to an injection of naked DNA. Using a LacZ expression cassette, up to 30% of the muscle fibers expressed the reporter gene. Furthermore, we show that the effect can be obtained using different promoters. Finally, we document that, to some extent, all five poloxamers possess membrane permeabilizing properties. CONCLUSIONS Taken together, the results obtained in the present study show that there is a large flexibility in terms of molecular weight and EO/PO ratio for obtaining increased levels of transgene expression in vivo.
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Shaik N, Giri N, Elmquist WF. Investigation of the micellar effect of pluronic P85 on P-glycoprotein inhibition: cell accumulation and equilibrium dialysis studies. J Pharm Sci 2010; 98:4170-90. [PMID: 19283769 DOI: 10.1002/jps.21723] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The objective of this study was: (1) to characterize the P-gp inhibitory effect of different concentrations of Pluronic P85 on anti-HIV-1 drug cellular accumulation, and (2) to investigate the relationship between cellular accumulation and free fraction of drug. Cellular accumulation studies in MDCKII-WT and MDCKII-MDR1 cell monolayers showed a biphasic dose response characterized by decline in accumulation at Pluronic concentrations greater than the CMC. This phenomenon was independent of the inhibition of P-gp efflux by Pluronic. Cell-free equilibrium dialysis was used to determine the effect of Pluronic P85 on drug free fraction and the affinity of Pluronic micelles for drug was modeled. Nelfinavir and saquinavir associated extensively with micelles and equilibrium free fractions were low at P85 concentrations above the CMC, with association constants being in the order nelfinavir > saquinavir >>> abacavir. Abacavir, a P-gp substrate, showed no association with micelles yet showed a biphasic response in cellular accumulation. These data suggest that, above the CMC, inhibition of P-gp is not affected but rather factors such as micellar trapping could contribute to decreased accumulation. Therefore, the in vitro evaluation of the effect of Pluronic formulations on active transport should take into account both the physicochemical properties of drug and the composition of Pluronic.
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Affiliation(s)
- Naveed Shaik
- Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 308 Harvard St. SE, Minneapolis, Minnesota 55455, USA
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Shaik N, Pan G, Elmquist WF. Interactions of pluronic block copolymers on P-gp efflux activity: experience with HIV-1 protease inhibitors. J Pharm Sci 2009; 97:5421-33. [PMID: 18393290 DOI: 10.1002/jps.21372] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The objective was to examine the influence of Pluronic block-copolymers on the interaction between the drug efflux transporter, P-glycoprotein and HIV-1 protease inhibitors (PIs). The ATPase assay determined the effect of various Pluronics on PI-stimulated P-gp ATPase activity. Cellular accumulation studies were conducted using MDCKII and LLC-PK1 cells transfected with human MDR1 to assess Pluronic modulation of PI efflux. Pluronic P85 inhibited both basal and nelfinavir-stimulated P-gp ATPase activity, while Pluronic F127 had no effect. In cell accumulation studies, Pluronic P85 restored the accumulation of nelfinavir in MDCKII-MDR1 cells while Pluronic F127 and F88 had no effect. Pluronic P85 increased saquinavir accumulation in wild-type and MDR1-transfected cells in both the MDCKII and LLC-PK1 cell models, suggesting inhibition of multiple transporters, including MRPs. In conclusion, this study provides evidence that a block-copolymer, Pluronic P85, effectively inhibits the interaction of P-gp with nelfinavir and saquinavir. These data indicate that effective inhibition of HIV-1 PI efflux by Pluronic P85 may influence the distribution of antiretroviral agents to sites protected by efflux mechanisms, such as the blood-brain barrier, and possibly increase the brain exposure of these drugs resulting in suppression of viral replication and reduction in the incidence of drug resistant mutants.
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Affiliation(s)
- Naveed Shaik
- Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 308 Harvard St. SE, Room 9-125d, Weaver-Densford Hall, Minneapolis, Minnesota 55455, USA
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Gaymalov ZZ, Yang Z, Pisarev VM, Alakhov VY, Kabanov AV. The effect of the nonionic block copolymer pluronic P85 on gene expression in mouse muscle and antigen-presenting cells. Biomaterials 2008; 30:1232-45. [PMID: 19064283 DOI: 10.1016/j.biomaterials.2008.10.064] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2008] [Accepted: 10/31/2008] [Indexed: 11/29/2022]
Abstract
DNA vaccines can be greatly improved by polymer agents that simultaneously increase transgene expression and activate immunity. We describe here Pluronic P85 (P85), a triblock copolymer of ethylene oxide (EO) and propylene oxide (PO) EO(26)-PO(40)-EO(26). Using a mouse model we demonstrate that co-administration of a bacterial plasmid DNA with P85 in a skeletal muscle greatly increases gene expression in the injection site and distant organs, especially the draining lymph nodes and spleen. The reporter expression colocalizes with the specific markers of myocytes and keratinocytes in the muscle, as well as dendritic cells (DCs) and macrophages in the muscle, lymph nodes and spleen. Furthermore, DNA/P85 and P85 alone increase the systemic expansion of CD11c+ (DC), and local expansion of CD11c+, CD14+ (macrophages) and CD49b+ (natural killer) cell populations. DNA/P85 (but not P85) also increases maturation of local DC (CD11c+ CD86+, CD11c+ CD80 +, and CD11c+ CD40+. We suggest that DNA/P85 promotes the activation and recruitment of the antigen-presenting cells, which further incorporate, express and carry the transgene to the immune system organs.
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Affiliation(s)
- Zagit Z Gaymalov
- Center for Drug Delivery and Nanomedicine, Department of Pharmaceutical Sciences, College of Pharmacy, University of Nebraska Medical Center, 985830 Nebraska Medical Center, Omaha, NE 68198-5830, United States
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Govender S, Swart P. Surfactant formulations for multi-functional surface modification. Colloids Surf A Physicochem Eng Asp 2008. [DOI: 10.1016/j.colsurfa.2008.07.057] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Krupka TM, Dremann D, Exner AA. Time and dose dependence of pluronic bioactivity in hyperthermia-induced tumor cell death. Exp Biol Med (Maywood) 2008; 234:95-104. [PMID: 18997100 DOI: 10.3181/0807-rm-223] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Pluronic block copolymers have been shown to sensitize cancer cells resulting in an increased activity of antineoplastic agents. In the current study we examined a new application of Pluronic bioactivity in potentiating hyperthermia-induced cancer cell injury. DHD/K12/TRb rat adenocarcinoma cells were exposed to low-grade hyperthermia at 43 degrees C with or without Pluronic P85 or Pluronic L61. A range of Pluronic doses, pre-exposure and heat exposure durations were investigated, and the test conditions were optimized. Treatment efficacy was assessed by measurement of intracellular ATP and mitochondrial dehydrogenase activity. Both P85 and L61 in synergy with heat reduced cell viability appreciably compared to either heat or Pluronic alone. Under optimal conditions, P85 (10 mg/ml, 240 mins) combined with 15 mins heat reduced intracellular ATP to 60.1 +/- 3.5% of control, while heat alone and P85 without heat caused a negligible decrease in ATP of 1.2% and 3.8%, respectively. Similarly, cells receiving 120 mins pre-exposure of L61 (0.3 mg/ml) showed reduction in intracellular ATP to 14.1 +/- 2.1% of control. Again, heat or L61 pre-exposure alone caused a minor decrease in levels of intracellular ATP (1.5% and 4.4%, respectively). Comparable results were observed when viability was assessed by mitochondrial enzyme activity. Survival studies confirmed that the loss of viability translates to a long-term reduction in proliferative activity, particularly for L61 treated cells. Based on these results, we conclude that Pluronic is effective in improving hyperthermic cancer treatment in vitro by potentiating heat-induced cytotoxicity in a concentration and time dependent manner.
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Affiliation(s)
- Tianyi M Krupka
- Department of Radiology, Case Western Reserve University, Cleveland, OH 44106-5056, USA
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