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PEGylation: a promising strategy to overcome challenges to cancer-targeted nanomedicines: a review of challenges to clinical transition and promising resolution. Drug Deliv Transl Res 2019; 9:721-734. [DOI: 10.1007/s13346-019-00631-4] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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52
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Viitala L, Pajari S, Gentile L, Määttä J, Gubitosi M, Deska J, Sammalkorpi M, Olsson U, Murtomäki L. Shape and Phase Transitions in a PEGylated Phospholipid System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2019; 35:3999-4010. [PMID: 30789270 PMCID: PMC6727609 DOI: 10.1021/acs.langmuir.8b03829] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2018] [Revised: 02/18/2019] [Indexed: 05/23/2023]
Abstract
Poly(ethylene glycol) (PEG) polymers and PEG-conjugated lipids are widely used in bioengineering and drug transport applications. A PEG layer in a drug carrier increases hydrophilic repulsion, inhibits membrane fusion and serum opsonin interactions, and prolongs the storage and circulation time. It can also change the carrier shape and have an influence on many properties related to the content release of the carrier. In this paper, we focus on the physicochemical effects of PEGylation in the lipid bilayer. We introduce laurdanC as a fluorophore for shape recognition and phase transition detection. Together with laurdanC, cryogenic transmission electron microscopy, differential scanning calorimetry, molecular dynamics simulations, and small-angle X-ray scattering/wide-angle X-ray scattering, we acquire information of the particle/bilayer morphology and phase behavior in systems containing 1,2-dipalmitoyl- sn-glycero-3-phosphocholine:1,2-distearoyl- sn-glycero-3-phosphoethanolamine-PEG(2000) with different fractions. We find that PEGylation leads to two important and potentially usable features of the system. (1) Spherical vesicles present a window of elevated chain-melting temperatures and (2) lipid packing shape-controlled liposome-to-bicelle transition. The first finding is significant for targets requiring multiple release sequences and the second enables tuning the release by composition and the PEG polymer length. Besides drug delivery systems, the findings can be used in other smart soft materials with trigger-polymers as well.
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Affiliation(s)
- Lauri Viitala
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Saija Pajari
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Luigi Gentile
- Physical
Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
- Department
of Biology, MEMEG Unit, Lund University, Sölvegatan 37, SE-223 62 Lund, Sweden
- PRPDepartment
of Chemistry, University of Bari Aldo Moro, Via Orabona 4, 70126 Bari, Italy
| | - Jukka Määttä
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Marta Gubitosi
- Physical
Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Jan Deska
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Maria Sammalkorpi
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
| | - Ulf Olsson
- Physical
Chemistry, Lund University, P.O. Box 124, SE-221 00 Lund, Sweden
| | - Lasse Murtomäki
- Department
of Chemistry and Materials Science, Aalto
University, P.O. Box 16100, FI-00076 Aalto, Finland
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53
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van Ballegooie C, Man A, Win M, Yapp DT. Spatially Specific Liposomal Cancer Therapy Triggered by Clinical External Sources of Energy. Pharmaceutics 2019; 11:E125. [PMID: 30884786 PMCID: PMC6470770 DOI: 10.3390/pharmaceutics11030125] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2019] [Revised: 03/12/2019] [Accepted: 03/13/2019] [Indexed: 11/25/2022] Open
Abstract
This review explores the use of energy sources, including ultrasound, magnetic fields, and external beam radiation, to trigger the delivery of drugs from liposomes in a tumor in a spatially-specific manner. Each section explores the mechanism(s) of drug release that can be achieved using liposomes in conjunction with the external trigger. Subsequently, the treatment's formulation factors are discussed, highlighting the parameters of both the therapy and the medical device. Additionally, the pre-clinical and clinical trials of each triggered release method are explored. Lastly, the advantages and disadvantages, as well as the feasibility and future outlook of each triggered release method, are discussed.
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Affiliation(s)
- Courtney van Ballegooie
- Experimental Therapeutics, BC Cancer, Vancouver, BC V5Z 1L3, Canada.
- Faculty of Medicine, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
| | - Alice Man
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
| | - Mi Win
- Department of Chemistry, Simon Fraser University, Burnaby, BC V5A 1S6, Canada.
| | - Donald T Yapp
- Experimental Therapeutics, BC Cancer, Vancouver, BC V5Z 1L3, Canada.
- Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, BC V6T 1Z3, Canada.
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54
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Zheng H, Li J, Wang M, Luo X, Qiu Q, Hu L, Li C, Song Y, Deng Y. Exhausting tumor associated macrophages with sialic acid-polyethyleneimine-cholesterol modified liposomal doxorubicin for enhancing sarcoma chemotherapy. Int J Pharm 2019; 558:187-200. [PMID: 30654062 DOI: 10.1016/j.ijpharm.2019.01.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2018] [Revised: 12/13/2018] [Accepted: 01/01/2019] [Indexed: 02/03/2023]
Abstract
To overstep the dilemma of chemical drug degradation within powerful lysosomes of tumor associated macrophages (TAMs), a sialic acid-polyethylenimine-cholesterol (SA-PEI-CH) modified liposomal doxorubicin (DOX-SPCL) was designed with both TAMs targeting and smart lysosomal trafficking. The modified liposome DOX-SPCL performed particle size as 103.2 ± 3.1 nm and zeta potential as -4.5 ± 0.9 mV with encapsulation efficiency as 95.8 ± 0.5%. In in vitro cell experiments, compared with conventional liposomal doxorubicin (DOX-CL) and PEGylated liposomal doxorubicin (DOX-PL), DOX-SPCL showed a selective binding on TAMs and a mere lysosomal concentration. In pharmacokinetic study, DOX-SPCL effectively impeded/delayed the disposition of mononuclear phagocyte system (MPS) with a value of AUC0-t as 796.03 ± 66.93 mg L-1 h. In S180 sarcomas bearing mice, DOX-SPCL showed the greatest tumor inhibition rate (92.7% ± 3.6%) compared with DOX-CL (46.4% ± 2.0%) or DOX-PL (58.8% ± 7.6%). The <0.5% positive region of TAMs in tumor section indicated a super TAMs exhaustion for DOX-SPCL treatment. Conclusively, DOX-SPCL was supposed as a safe and effective liposomal preparation for clinical sarcoma treatment via TAMs targeting/deletion delivery strategy.
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Affiliation(s)
- Huangliang Zheng
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Jiaqi Li
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Mengjing Wang
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Xiang Luo
- College of Chemistry and Chemical Engineering, Shaoxing University, No. 508 Huancheng West Road, Shaoxing, Zhejiang 312000, China
| | - Qiujun Qiu
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Ling Hu
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Cong Li
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China
| | - Yanzhi Song
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China.
| | - Yihui Deng
- School of Pharmacy, Shenyang Pharmaceutical University, No. 103 Wenhua Road, Shenyang, Liaoning 110016, China.
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55
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Kilic S, Bolukcu ES. Phase behavior of DSPC/PEG40St mixtures at higher emulsifier contents. Colloids Surf B Biointerfaces 2018; 171:368-376. [DOI: 10.1016/j.colsurfb.2018.07.046] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2018] [Revised: 06/23/2018] [Accepted: 07/23/2018] [Indexed: 12/23/2022]
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56
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Abstract
Medical imaging technology using nanoparticles has several advantages from it varies functional properties. As we described previous chapters, mesoporous silica nanoparticles demonstrated great contribution for nanomedicine progress and it has been expected to cause an innovation in medical field. Recently we developed a novel type of silica nanoparticles, organosilica nanoparticles. Organosilica nanoparticles are both structurally and functionally different from common silica nanoparticles by including mesoporous silica nanoparticles. The organosilica nanoparticles are inherent organic-inorganic hybrid nanomaterials. The interior and exterior functionalities of organosilica nanoparticles are effective for their internal and surface functionalization. Medical imaging using organosilica nanoparticles is making a new field of nano-medical imaging. Multifunctionalizations peculiar to organosilica nanoparticles enable to construct novel medical imaging system. In this chapter we will introduce organosilica nanoparticles, and its applications on advanced medical imaging.
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Affiliation(s)
- Michihiro Nakamura
- Department of Organ Anatomy & Nanomedicine, Yamaguchi University Graduate School of Medicine, Ube, Japan.
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57
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Kilic S. Quantification of PEG40St squeeze out from DSPC/PEG40St monolayers at higher molar ratios. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.05.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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58
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Membrane structural change of dimyristoylphosphatidylcholine liposome on the interaction with polyethyleneimine. Colloids Surf B Biointerfaces 2018; 167:509-515. [DOI: 10.1016/j.colsurfb.2018.04.054] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 04/02/2018] [Accepted: 04/26/2018] [Indexed: 11/21/2022]
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59
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Gelman D, Drezner H, Kraytsberg A, Starosvetsky D, Ein-Eli Y. Enhanced zinc corrosion mitigation via a tuned thermal pretreatment in an alkaline solution containing an organic inhibitor. J Solid State Electrochem 2018. [DOI: 10.1007/s10008-018-3922-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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60
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Kakimoto Y, Tachihara Y, Okamoto Y, Miyazawa K, Fukuma T, Tero R. Morphology and Physical Properties of Hydrophilic-Polymer-Modified Lipids in Supported Lipid Bilayers. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2018; 34:7201-7209. [PMID: 29788718 DOI: 10.1021/acs.langmuir.8b00870] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Lipid molecules such as glycolipids that are modified with hydrophilic biopolymers participate in the biochemical reactions occurring on cell membranes. Their functions and efficiency are determined by the formation of microdomains and their physical properties. We investigated the morphology and properties of domains induced by the hydrophilic-polymer-modified lipid applying a polyethylene glycol (PEG)-modified lipid as a model modified lipid. We formed supported lipid bilayers (SLBs) using a 0-10 mol % range of PEG-modified lipid concentration ( CPEG). We studied their morphology and fluidity by fluorescence microscopy, the fluorescence recovery after photobleaching method, and atomic force microscopy (AFM). Fluorescence images showed that domains rich in the PEG-modified lipid appeared and SLB fluidity decreased when CPEG ≥ 5%. AFM topographies showed that clusters of the PEG-modified lipid appeared prior to domain formation and the PEG-lipid-rich domains were observed as depressions. Frequency-modulation AFM revealed a force-dependent appearance of the PEG-lipid-rich domain.
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Affiliation(s)
- Yasuhiro Kakimoto
- Department of Environmental and Life Sciences , Toyohashi University of Technology , Toyohashi , Aichi 441-8580 , Japan
| | - Yoshihiro Tachihara
- Department of Environmental and Life Sciences , Toyohashi University of Technology , Toyohashi , Aichi 441-8580 , Japan
| | - Yoshiaki Okamoto
- Department of Environmental and Life Sciences , Toyohashi University of Technology , Toyohashi , Aichi 441-8580 , Japan
| | - Keisuke Miyazawa
- Division of Electrical Engineering and Computer Science , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Takeshi Fukuma
- Division of Electrical Engineering and Computer Science , Kanazawa University , Kakuma-machi, Kanazawa 920-1192 , Japan
- Nano Life Science Institute (WPI-NanoLSI) , Kakuma-machi, Kanazawa 920-1192 , Japan
| | - Ryugo Tero
- Department of Environmental and Life Sciences , Toyohashi University of Technology , Toyohashi , Aichi 441-8580 , Japan
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61
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Shabana AM, Monda UK, Alam MR, Spoon T, Ross CA, Madesh M, Supuran CT, Ilies MA. pH-Sensitive Multiligand Gold Nanoplatform Targeting Carbonic Anhydrase IX Enhances the Delivery of Doxorubicin to Hypoxic Tumor Spheroids and Overcomes the Hypoxia-Induced Chemoresistance. ACS APPLIED MATERIALS & INTERFACES 2018; 10:17792-17808. [PMID: 29733576 PMCID: PMC6338346 DOI: 10.1021/acsami.8b05607] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Hypoxia is a common feature of solid tumors contributing to resistance to chemotherapy. Selective delivery of chemotherapeutic drugs to hypoxic tumor niche remains an unsolved issue. For this purpose, we constructed a gold nanoplatform targeting carbonic anhydrase IX (CA IX) epitope, which is overexpressed in hypoxic tumor cells versus in normal tissues. We designed compatible low-molecular weight carbonic anhydrase inhibitor (CAI) ligands and doxorubicin (Dox) ligands and optimized protocols for efficient decoration of gold nanoparticles (Au NPs) to achieve both good targeting ligand density and optimum drug loading, while preserving colloidal stability. The optimized Dox-HZN-DTDP@Au NPs-LA-PEG2000-CAI (THZN) nanoplatform was proved to be very efficient toward killing HT-29 tumor cells, especially under hypoxic conditions, as compared with the nontargeting nanoplatform. This also mediated the effective release of doxorubicin in the lysosomes following internalization, as revealed by confocal microscopy. Furthermore, using tumor spheroids as a representative model for hypoxic solid tumors, our THZN nanoplatform enhanced the selective delivery of doxorubicin up to 2.5 times and minimized chemoresistance, showing better tumor drug penetration as compared to that in free drug treatment. Our technology is the first CA IX-targeting gold nanoplatform for efficient delivery of doxorubicin to hypoxic tumors in a controlled fashion, with the perspective to improve the therapy of solid tumors and minimize chemoresistance.
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Affiliation(s)
- Ahmed M. Shabana
- Department of Pharmaceutical Sciences and Moulder Center of Drug Discovery Research, Temple University School of Pharmacy, 3307 N Broad Street, Philadelphia, PA-19140
| | - Utpal K. Monda
- Department of Pharmaceutical Sciences and Moulder Center of Drug Discovery Research, Temple University School of Pharmacy, 3307 N Broad Street, Philadelphia, PA-19140
| | - Md. Raqibul Alam
- Department of Pharmaceutical Sciences and Moulder Center of Drug Discovery Research, Temple University School of Pharmacy, 3307 N Broad Street, Philadelphia, PA-19140
| | - Taylor Spoon
- College of Science and Technology, Temple University, 1803 N Broad Street, Philadelphia, PA-19122
| | - Codee Alicia Ross
- College of Science and Technology, Temple University, 1803 N Broad Street, Philadelphia, PA-19122
| | - Muniswamy Madesh
- Department of Biochemistry, Temple University School of Medicine, 3500 N Broad Street, Philadelphia, PA-19140, USA
| | - Claudiu T. Supuran
- NEUROFARBA Department, Pharmaceutical Sciences Section, Universita degli Studi di Firenze, Polo Scientifico, Via Ugo Schiff no. 6, 50019 Sesto Fiorentino (Florence), Italy
| | - Marc A. Ilies
- Department of Pharmaceutical Sciences and Moulder Center of Drug Discovery Research, Temple University School of Pharmacy, 3307 N Broad Street, Philadelphia, PA-19140
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62
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Watanabe A, Niu J, Lunn DJ, Lawrence J, Knight AS, Zhang M, Hawker CJ. PET‐RAFT as a facile strategy for preparing functional lipid–polymer conjugates. ACTA ACUST UNITED AC 2018. [DOI: 10.1002/pola.29007] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Akira Watanabe
- Materials Research LaboratoryUniversity of CaliforniaSanta Barbara California93106
| | - Jia Niu
- Department of ChemistryBoston CollegeChestnut Hill Massachusetts02467
- California NanoSystems Institute, University of CaliforniaSanta Barbara California93106
| | - David J. Lunn
- Materials Research LaboratoryUniversity of CaliforniaSanta Barbara California93106
- Department of ChemistryUniversity of OxfordOxfordOX1 3TA United Kingdom
| | - Jimmy Lawrence
- Materials Research LaboratoryUniversity of CaliforniaSanta Barbara California93106
| | - Abigail S. Knight
- Materials Research LaboratoryUniversity of CaliforniaSanta Barbara California93106
| | - Mengwen Zhang
- Department of Chemical EngineeringUniversity of CaliforniaSanta Barbara California93106
| | - Craig J. Hawker
- Materials Research LaboratoryUniversity of CaliforniaSanta Barbara California93106
- California NanoSystems Institute, University of CaliforniaSanta Barbara California93106
- Materials DepartmentUniversity of CaliforniaSanta Barbara California93106
- Department of Chemistry & BiochemistryUniversity of CaliforniaSanta Barbara California93106
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63
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Albumin-Encapsulated Liposomes: A Novel Drug Delivery Carrier With Hydrophobic Drugs Encapsulated in the Inner Aqueous Core. J Pharm Sci 2018; 107:436-445. [DOI: 10.1016/j.xphs.2017.08.003] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2017] [Revised: 08/04/2017] [Accepted: 08/08/2017] [Indexed: 12/13/2022]
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64
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Giansanti L, Bozzuto G, Fracassi A, Bombelli C, Stringaro A, Molinari A, Piozzi A, Sennato S, Mancini G. Effect of preparation protocol on physicochemical features and biointeractions of pegylated liposomes. Colloids Surf A Physicochem Eng Asp 2017. [DOI: 10.1016/j.colsurfa.2017.04.037] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
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65
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Lin J, Zhang H, Morovati V, Dargazany R. PEGylation on mixed monolayer gold nanoparticles: Effect of grafting density, chain length, and surface curvature. J Colloid Interface Sci 2017; 504:325-333. [DOI: 10.1016/j.jcis.2017.05.046] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2017] [Accepted: 05/15/2017] [Indexed: 01/28/2023]
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66
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Cosco D, Tsapis N, Nascimento TL, Fresta M, Chapron D, Taverna M, Arpicco S, Fattal E. Polysaccharide-coated liposomes by post-insertion of a hyaluronan-lipid conjugate. Colloids Surf B Biointerfaces 2017; 158:119-126. [DOI: 10.1016/j.colsurfb.2017.06.029] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 06/19/2017] [Accepted: 06/20/2017] [Indexed: 12/16/2022]
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67
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Mkhwanazi NK, de Koning CB, van Otterlo WAL, Ariatti M, Singh M. PEGylation potentiates hepatoma cell targeted liposome-mediated in vitro gene delivery via the asialoglycoprotein receptor. ACTA ACUST UNITED AC 2017; 72:293-301. [PMID: 28063265 DOI: 10.1515/znc-2016-0172] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2016] [Accepted: 11/24/2016] [Indexed: 01/04/2023]
Abstract
Hepatocellular carcinoma is a burgeoning health issue in sub-Saharan Africa and East Asia where it is most prevalent. The search for gene medicine treatment modalities for this condition represents a novel departure from current treatment options and is gaining momentum. Here we report on nonPEGylated and on sterically stabilized PEGylated cationic liposomes decorated with D-galacto moieties linked to 24.1 Å spacers for asialoglycoprotein receptor (ASGP-R)-targeted vehiculation of pCMV-luc plasmid DNA. Cargo DNA is fully liposome associated at N/P ratio=3:1 and is partially protected from the effects of serum nucleases. Moreover, at this ratio, lipoplex dimensions (89-97 nm) are compatible with the requirements for extravasation in vivo. Ethidium displacement assays show that the reporter DNA is in a less condensed state when bound to PEGylated liposomes than with nonPEGylated liposomes. PEGylated lipoplexes were well tolerated by both HEK293 (ASGP-R-negative) and HepG2 (ASGP-R-positive) cell lines and delivered DNA to the human hepatoma cell line HepG2 by ASGP-R mediation at levels three-fold greater than nonPEGylated lipoplexes. PEGylated ASGP-R-targeted liposomes reported in this study possess the required characteristics for hepatotropic gene delivery and may be considered for further application in vivo.
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Affiliation(s)
- Nkosiyethu K Mkhwanazi
- Non-viral Gene Delivery Laboratory, Discipline of Biochemistry, Westville Campus, University of KwaZulu-Natal, P. Bag X54001, Durban, 4000, South Africa
| | - Charles B de Koning
- Molecular Sciences Institute, Department of Chemistry, University of the Witwatersrand, P. Bag 3, Wits 2050, South Africa
| | - Willem A L van Otterlo
- Department of Chemistry and Polymer Sciences, Stellenbosch University, P. Bag X1, Matieland 7602, South Africa
| | - Mario Ariatti
- Non-viral Gene Delivery Laboratory, Discipline of Biochemistry, Westville Campus, University of KwaZulu-Natal, P. Bag X54001, Durban, 4000, South Africa, Phone: +27 31 2607981, Fax: +27 31 2607942
| | - Moganavelli Singh
- Non-viral Gene Delivery Laboratory, Discipline of Biochemistry, Westville Campus, University of KwaZulu-Natal, P. Bag X54001, Durban, 4000, South Africa
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68
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Sakamoto Y, Kikuchi K, Umeda K, Nakanishi H. Effects of various spacers between biotin and the phospholipid headgroup on immobilization and sedimentation of biotinylated phospholipid-containing liposomes facilitated by avidin-biotin interactions. J Biochem 2017; 162:221-226. [PMID: 28444248 DOI: 10.1093/jb/mvx016] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2016] [Accepted: 02/22/2017] [Indexed: 11/13/2022] Open
Abstract
Immobilization and sedimentation of liposomes (lipid vesicles) are used in liposome-protein binding assays, facilitated by avidin/streptavidin/NeutrAvidin and biotinylated phospholipid-containing liposomes. Here, we examined the effects of three spacers [six-carbon (X), polyethylene glycol (PEG) 180 (molecular weight 180) and PEG2000 (molecular weight 2,000)] between biotin and the phospholipid headgroup on the immobilization and sedimentation of small unilamellar liposomes/vesicles (SUVs). PEG180 and PEG2000 showed more efficient immobilization of biotinylated SUVs on NeutrAvidin-coated plates than X, but X and PEG180 showed more efficient sedimentation of biotinylated SUVs upon NeutrAvidin addition than PEG2000. Thus, the most appropriate spacers differed between immobilization and sedimentation. A spacer for biotinylated SUVs must be selected according to the particular liposome-protein binding assays examined.
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Affiliation(s)
- Yasuhisa Sakamoto
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Koji Kikuchi
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Kazuaki Umeda
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
| | - Hiroyuki Nakanishi
- Department of Molecular Pharmacology, Graduate School of Medical Sciences, Kumamoto University, 1-1-1 Honjo, Kumamoto 860-8556, Japan
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69
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Smith MC, Crist RM, Clogston JD, McNeil SE. Zeta potential: a case study of cationic, anionic, and neutral liposomes. Anal Bioanal Chem 2017; 409:5779-5787. [PMID: 28762066 DOI: 10.1007/s00216-017-0527-z] [Citation(s) in RCA: 207] [Impact Index Per Article: 29.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 07/10/2017] [Accepted: 07/14/2017] [Indexed: 01/17/2023]
Abstract
Zeta potential is often used to approximate a nanoparticle's surface charge, i.e., cationic, anionic, or neutral character, and has become a standard characterization technique to evaluate nanoparticle surfaces. While useful, zeta potential values provide only very general conclusions about surface charge character. Without a thorough understanding of the measurement parameters and limitations of the technique, these values can become meaningless. This case study attempts to explore the sensitivity of zeta potential measurement using specifically formulated cationic, anionic, and neutral liposomes. This study examines zeta potential dependence on pH and ionic strength, resolving power, and highlights the sensitivity of zeta potential to charged liposomes. Liposomes were prepared with cholesterol, 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC), and varying amounts of 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP) or 1,2-dioleoyl-sn-glycero-3-phospho-L-serine (DOPS). A strong linear relationship was noted between zeta potential values and the mole percentage of charged lipids within a liposome (e.g., cationic DOTAP or anionic DOPS). This finding could be used to formulate similar liposomes to a specific zeta potential, potentially of importance for systems sensitive to highly charged species. In addition, cationic and anionic liposomes were titrated with up to two mole percent of the neutral lipid 1,2-distearoyl-sn-glycero-3-phosphoethanolamine-N-[methoxy(polyethylene glycol)-2000] (lipid-PEG; LP). Very small amounts of the lipid-PEG (<0.2 mol%) were found to impart stability to the DOTAP- and DOPS-containing liposomes without significantly affecting other physicochemical properties of the formulation, providing a simple approach to making stable liposomes with cationic and anionic surface charge.
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Affiliation(s)
- Mackensie C Smith
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA
| | - Rachael M Crist
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA
| | - Jeffrey D Clogston
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA.
| | - Scott E McNeil
- Nanotechnology Characterization Laboratory, Cancer Research Technology Program, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, MD, 21702, USA
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Paolino D, Accolla ML, Cilurzo F, Cristiano MC, Cosco D, Castelli F, Sarpietro MG, Fresta M, Celia C. Interaction between PEG lipid and DSPE/DSPC phospholipids: An insight of PEGylation degree and kinetics of de-PEGylation. Colloids Surf B Biointerfaces 2017; 155:266-275. [PMID: 28460301 DOI: 10.1016/j.colsurfb.2017.04.018] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2017] [Revised: 04/06/2017] [Accepted: 04/10/2017] [Indexed: 11/27/2022]
Abstract
The degree to which liposomes are PEGylated is the feature, which most influences the length of the presence of stealth liposomes in the bloodstream. In order to thoroughly investigate the maximum amount of DSPE-PEG2000 that can be used to stabilize stealth liposomes, these were synthesized at different concentrations of DSPE-PEG2000 and their physicochemical properties were investigated by using differential scanning calorimetry (DSC). The kinetics of PEGylation and de-PEGylation were performed by incubating non-stealth liposomes in a DSPE-PEG2000 suspension at different incubation times, and then analyzing the data using DSC and dynamic light scattering (DLS) techniques. The results demonstrated that DSPE-PEG2000 was self-assembled in the phospholipid bilayers, thus forming stealth liposomes. The different amounts of DSPE-PEG2000 in the bilayer triggered a de-PEGylation phenomenon, resulting in mixed nanoaggregates, which derived from the detergent-like properties of the PEGylated phospholipids.
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Affiliation(s)
- Donatella Paolino
- Department of Experimental and Clinical Medicine, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy; IRC-FSH-Interregional Research Center for Food Safety & Health, University of Catanzaro "Magna Græcia", Building of BioSciences, V.le Europa, I- 88100 Germaneto, Catanzaro, CZ, Italy
| | - Maria Lorena Accolla
- Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy; Department of Drug Sciences, University of Catania, V.le A. Doria 6, I - 95125 Catania, Italy
| | - Felisa Cilurzo
- Department of Pharmacy, University of Chieti - Pescara "G. d'Annunzio", Via dei Vestini 31, I - 66100 Chieti, Italy
| | - Maria Chiara Cristiano
- Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy
| | - Donato Cosco
- IRC-FSH-Interregional Research Center for Food Safety & Health, University of Catanzaro "Magna Græcia", Building of BioSciences, V.le Europa, I- 88100 Germaneto, Catanzaro, CZ, Italy; Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy
| | - Francesco Castelli
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, I - 95125 Catania, Italy
| | - Maria Grazia Sarpietro
- Department of Drug Sciences, University of Catania, V.le A. Doria 6, I - 95125 Catania, Italy
| | - Massimo Fresta
- IRC-FSH-Interregional Research Center for Food Safety & Health, University of Catanzaro "Magna Græcia", Building of BioSciences, V.le Europa, I- 88100 Germaneto, Catanzaro, CZ, Italy; Department of Health Sciences, University of Catanzaro "Magna Graecia", Building of BioSciences, V.le Europa, I - 88100 Germaneto, Catanzaro, CZ, Italy
| | - Christian Celia
- Department of Pharmacy, University of Chieti - Pescara "G. d'Annunzio", Via dei Vestini 31, I - 66100 Chieti, Italy; Department of Nanomedicine, Houston Methodist Research Institute, 6670 Bertner Avenue, Houston, TX 77030, USA.
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71
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Shriver-Lake LC, Anderson GP, Taitt CR. Effect of Linker Length on Cell Capture by Poly(ethylene glycol)-Immobilized Antimicrobial Peptides. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:2878-2884. [PMID: 28253616 DOI: 10.1021/acs.langmuir.6b04481] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
Development of antimicrobial peptide (AMP)-functionalized materials has renewed interest in using poly(ethylene glycol) (PEG)-mediated linking to minimize unwanted interactions while engendering the peptides with sufficient flexibility and freedom of movement to interact with the targeted cell types. While PEG-based linkers have been used in many AMP-based materials, the role of the tether length has been minimally explored. Here, we assess the impact of varying the length of PEG-based linkers on the binding of bacterial cells by surface-immobilized AMPs. While higher surface densities of immobilized AMPs were observed using shorter PEG linkers, the increased density was insufficient to fully account for the increased binding activity of peptides. Furthermore, effects were specific to both the peptide and cell type tested. These results suggest that simple alterations in linking strategies-such as changing tether length-may result in large differences in the surface properties of the immobilized AMPs that are not easily predictable.
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Affiliation(s)
- Lisa C Shriver-Lake
- Center for Biomolecular Science & Engineering, Naval Research Laboratory , 4555 Overlook Avenue, SW, Washington, DC 20375, United States
| | - George P Anderson
- Center for Biomolecular Science & Engineering, Naval Research Laboratory , 4555 Overlook Avenue, SW, Washington, DC 20375, United States
| | - Chris Rowe Taitt
- Center for Biomolecular Science & Engineering, Naval Research Laboratory , 4555 Overlook Avenue, SW, Washington, DC 20375, United States
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72
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Oroskar P, Jameson CJ, Murad S. Molecular dynamics simulations reveal how characteristics of surface and permeant affect permeation events at the surface of soft matter. MOLECULAR SIMULATION 2017. [DOI: 10.1080/08927022.2016.1268259] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Priyanka Oroskar
- Department of Chemical Engineering, University of Illinois at Chicago, Chicago, IL, USA
| | - Cynthia J. Jameson
- Department of Chemistry, University of Illinois at Chicago, Chicago, IL, USA
| | - Sohail Murad
- Department of Chemical Engineering, Illinois Institute of Technology, Chicago, IL, USA
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73
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Bozó T, Mészáros T, Mihály J, Bóta A, Kellermayer MS, Szebeni J, Kálmán B. Aggregation of PEGylated liposomes driven by hydrophobic forces. Colloids Surf B Biointerfaces 2016; 147:467-474. [DOI: 10.1016/j.colsurfb.2016.06.056] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 06/23/2016] [Accepted: 06/27/2016] [Indexed: 12/26/2022]
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74
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Liposomal drug delivery systems for targeted cancer therapy: is active targeting the best choice? Future Med Chem 2016; 8:2091-2112. [PMID: 27774793 DOI: 10.4155/fmc-2016-0135] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023] Open
Abstract
Liposomes are biodegradable and biocompatible self-forming spherical lipid bilayer vesicles. They can encapsulate and deliver one or more hydrophobic and hydrophilic therapeutic agents with poor therapeutic indices to tumor sites. Properties such as lipid bilayer fluidity, charge, size and surface hydration can be modified to extend liposome circulation time in the bloodstream and enhance efficacy. The focus of this review is on ligand-conjugated liposomes and their potential application in tumor-targeted delivery. Ligand-conjugated liposomes are designed to target receptors which are overexpressed on tumor cells to decrease drugs side effects by enhancing their selective delivery to tumor site. Despite the extensive research in this area, no small molecule ligand-conjugated liposome has been approved up to date for cancer therapy.
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75
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Elbaradei A, Brown SL, Miller JB, May S, Hobbie EK. Interaction of polymer-coated silicon nanocrystals with lipid bilayers and surfactant interfaces. Phys Rev E 2016; 94:042804. [PMID: 27841530 DOI: 10.1103/physreve.94.042804] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2016] [Indexed: 06/06/2023]
Abstract
We use photoluminescence (PL) microscopy to measure the interaction between polyethylene-glycol-coated (PEGylated) silicon nanocrystals (SiNCs) and two model surfaces: lipid bilayers and surfactant interfaces. By characterizing the photostability, transport, and size-dependent emission of the PEGylated nanocrystal clusters, we demonstrate the retention of red PL suitable for detection and tracking with minimal blueshift after a year in an aqueous environment. The predominant interaction measured for both interfaces is short-range repulsion, consistent with the ideal behavior anticipated for PEGylated phospholipid coatings. However, we also observe unanticipated attractive behavior in a small number of scenarios for both interfaces. We attribute this anomaly to defective PEG coverage on a subset of the clusters, suggesting a possible strategy for enhancing cellular uptake by controlling the homogeneity of the PEG corona. In both scenarios, the shape of the apparent potential is modeled through the free or bound diffusion of the clusters near the confining interface.
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Affiliation(s)
- Ahmed Elbaradei
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Samuel L Brown
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Joseph B Miller
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Sylvio May
- North Dakota State University, Fargo, North Dakota 58108, USA
| | - Erik K Hobbie
- North Dakota State University, Fargo, North Dakota 58108, USA
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76
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Kulkarni A, Pandey P, Rao P, Mahmoud A, Goldman A, Sabbisetti V, Parcha S, Natarajan SK, Chandrasekar V, Dinulescu D, Roy S, Sengupta S. Algorithm for Designing Nanoscale Supramolecular Therapeutics with Increased Anticancer Efficacy. ACS NANO 2016; 10:8154-68. [PMID: 27452234 DOI: 10.1021/acsnano.6b00241] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
In the chemical world, evolution is mirrored in the origin of nanoscale supramolecular structures from molecular subunits. The complexity of function acquired in a supramolecular system over a molecular subunit can be harnessed in the treatment of cancer. However, the design of supramolecular nanostructures is hindered by a limited atomistic level understanding of interactions between building blocks. Here, we report the development of a computational algorithm, which we term Volvox after the first multicellular organism, that sequentially integrates quantum mechanical energy-state- and force-field-based models with large-scale all-atomistic explicit water molecular dynamics simulations to design stable nanoscale lipidic supramolecular structures. In one example, we demonstrate that Volvox enables the design of a nanoscale taxane supramolecular therapeutic. In another example, we demonstrate that Volvox can be extended to optimizing the ratio of excipients to form a stable nanoscale supramolecular therapeutic. The nanoscale taxane supramolecular therapeutic exerts greater antitumor efficacy than a clinically used taxane in vivo. Volvox can emerge as a powerful tool in the design of nanoscale supramolecular therapeutics for effective treatment of cancer.
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Affiliation(s)
- Ashish Kulkarni
- Department of Medicine, Harvard Medical School , Boston, Massachusetts 02115, United States
- Harvard-MIT Division of Health Sciences and Technology , Cambridge, Massachusetts 02139, United States
| | - Prithvi Pandey
- India Innovation Research Center , Invictus Oncology, New Delhi 110092, India
| | | | | | - Aaron Goldman
- Department of Medicine, Harvard Medical School , Boston, Massachusetts 02115, United States
- Harvard-MIT Division of Health Sciences and Technology , Cambridge, Massachusetts 02139, United States
- Harvard Digestive Diseases Center , Boston, Massachusetts 02115, United States
| | - Venkata Sabbisetti
- Department of Medicine, Harvard Medical School , Boston, Massachusetts 02115, United States
| | | | | | | | | | - Sudip Roy
- India Innovation Research Center , Invictus Oncology, New Delhi 110092, India
| | - Shiladitya Sengupta
- Department of Medicine, Harvard Medical School , Boston, Massachusetts 02115, United States
- Harvard-MIT Division of Health Sciences and Technology , Cambridge, Massachusetts 02139, United States
- Dana Farber Cancer Institute , Boston, Massachusetts 02115, United States
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77
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Ang J, Ma D, Lund R, Keten S, Xu T. Internal Structure of 15 nm 3-Helix Micelle Revealed by Small-Angle Neutron Scattering and Coarse-Grained MD Simulation. Biomacromolecules 2016; 17:3262-3267. [DOI: 10.1021/acs.biomac.6b00986] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Dan Ma
- Department
of Civil and Environmental Engineering and Department of Mechanical
Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Reidar Lund
- Department
of Chemistry, University of Oslo, P.O. Box 1033, Blindern, N-0315 Oslo, Norway
| | - Sinan Keten
- Department
of Civil and Environmental Engineering and Department of Mechanical
Engineering, Northwestern University, Evanston, Illinois 60208, United States
| | - Ting Xu
- Material
Science Division, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States
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78
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The effect of monosialylganglioside mix modifying the PEGylated liposomal epirubicin on the accelerated blood clearance phenomenon. Asian J Pharm Sci 2016; 12:134-142. [PMID: 32104322 PMCID: PMC7032097 DOI: 10.1016/j.ajps.2016.06.005] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 05/25/2016] [Accepted: 06/21/2016] [Indexed: 02/03/2023] Open
Abstract
PEGylated liposomes are potential candidates to improve the pharmacokinetic characteristics of encapsulated drugs, to extend their circulation half-life and facilitate their passive accumulation at tumour sites. However, PEG-modified liposomes can induce accelerated blood clearance (ABC) upon repeated administration, and the extent of ABC phenomenon on the cytotoxic drugs-containing PEGylated liposomes is related to the dose of the cytotoxic drugs. In this study, EPI served as a model cytotoxic drug, a hydrophilic surfactant molecule, monosialylganglioside (GM1) was chosen and modified on the liposomes together with PEG. It was shown that upon mixed modification, when GM1 contents reached 10% or 15% mol, the ABC phenomenon of the PEGylated liposomal EPI significantly reduced. We also found that GM1 played an important role in abrogating the ABC phenomenon in both the induction phase and the effectuation phase. The results suggested that GM1 incorporation unfortunately did not avoid occurrence of ABC phenomenon completely, but GM1 modification on PEGylated liposomes may provide a significant improvement in clinical practice of PEGylated liposomes. Further study must be necessary.
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79
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Oroskar PA, Jameson CJ, Murad S. Simulated Permeation and Characterization of PEGylated Gold Nanoparticles in a Lipid Bilayer System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:7541-7555. [PMID: 27399834 DOI: 10.1021/acs.langmuir.6b01740] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
PEGylated gold nanoparticles are considered suitable nanocarriers for use in biomedical applications and targeted drug delivery systems. In our previous investigation with the alkanethiol-functionalized gold nanoparticle, we found that permeation across a protein-free phospholipid membrane resulted in damaging effects of lipid displacement and water and ion leakage. In the present study, we carry out a series of coarse-grained molecular simulations to explore permeation of lipid bilayer systems by a PEGylated gold nanoparticle, especially at the bulk-liquid-lipid interface as well as the interface between the two lipid leaflets. Initially, we examine molecular-level details of a PEGylated gold nanoparticle (constructed from cycled annealing) in water and find a distribution of ligand configurations (from mushroom to brush states) present in nanoparticles with medium to high surface coverage. We also find that the characteristic properties of the PEGylated gold nanoparticle do not change when it is placed in a salt solution. In our permeation studies, we investigate events of water and ion penetration as well as lipid translocation while varying the ligand length, nanoparticle surface coverage, and ion concentration gradient of our system. Results from our studies show the following: (1) The number of water molecules in the interior of the membrane during ligand-coated nanoparticle permeation increases with PEGn-SH surface coverage, ligand length, and permeation velocity but is not sensitive to the ion concentration gradient. (2) Lipid molecules do not leave the membrane; instead they complete trans-bilayer lipid flip-flop with longer ligands and higher surface coverages. (3) The lack of formation of stable water pores prevents ion translocation. (4) The PEGylated nanoparticle causes less damage to the membrane overall due to favorable interactions with the lipid headgroups which may explain why experimentalists observe endocytosis of PEGylated nanocarriers in vivo.
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Affiliation(s)
- Priyanka A Oroskar
- Department of Chemical Engineering, University of Illinois at Chicago , 810 South Clinton Street, Chicago, Illinois 60607, United States
| | - Cynthia J Jameson
- Department of Chemical Engineering, University of Illinois at Chicago , 810 South Clinton Street, Chicago, Illinois 60607, United States
- Department of Chemistry, University of Illinois at Chicago , 845 West Taylor Street, Chicago, Illinois 60607, United States
| | - Sohail Murad
- Department of Chemical Engineering, University of Illinois at Chicago , 810 South Clinton Street, Chicago, Illinois 60607, United States
- Department of Chemical and Biological Engineering, Illinois Institute of Technology , 3300 South Federal Street, Chicago, Illinois 60616, United States
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80
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Song SJ, Lee S, Lee Y, Choi JS. Enzyme-responsive destabilization of stabilized plasmid-lipid nanoparticles as an efficient gene delivery. Eur J Pharm Sci 2016; 91:20-30. [PMID: 27240779 DOI: 10.1016/j.ejps.2016.05.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Revised: 05/13/2016] [Accepted: 05/25/2016] [Indexed: 11/25/2022]
Abstract
Stabilized plasmid-lipid particles (SPLPs) have been developed to overcome the low stability issue of cationic liposomes, however, SPLPs that are too stable result in unsatisfactory transfection efficiency. In this article, we prepared enzyme-responsive SPLPs (eSPLPs) composed of 1,2-dioleoyl-3-trimethylammonium-propane (DOTAP), 1,2-dioleoyl-sn-glycero-3-phosphoethanolamine (DOPE), and mPEG-GLFG-K-(C16)2, a PEG lipid with an enzymatically-cleavable linker (glycine-phenylalanine-leucine-glycine, GFLG). eSPLPs were successfully prepared with plasmid DNA (pDNA) encapsulation efficiency of over 80%, using the detergent dialysis method. The PEG shell stabilized eSPLPs and maintained a hydrodynamic diameter of around 200nm. Although typical SPLPs were relatively intact in endosomal condition, the PEG shell of eSPLPs was cleaved following the degradation of the GFLG linker by cathepsin B in the endosome. Then, eSPLPs collapsed and induced endosomal disruption triggering the controlled release of the encapsulated pDNA into cytoplasm. Owing to the enzyme-responsive destabilization, eSPLPs showed a 10 to 100-fold higher transfection efficiency than control SPLPs, which was confirmed using luciferase assay. These results suggest that eSPLPs might be promising candidates for practical use as gene delivery systems, with both stability and high transfection efficiency for future in vivo applications.
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Affiliation(s)
- Su Jeong Song
- Department of Biochemistry, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Seulgi Lee
- Department of Biochemistry, Chungnam National University, Daejeon 305-764, Republic of Korea
| | - Yan Lee
- Department of Chemistry, Seoul National University, Seoul 157-742, Republic of Korea.
| | - Joon Sig Choi
- Department of Biochemistry, Chungnam National University, Daejeon 305-764, Republic of Korea.
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81
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Folate-targeted nanoparticles for rheumatoid arthritis therapy. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2016; 12:1113-1126. [DOI: 10.1016/j.nano.2015.12.365] [Citation(s) in RCA: 88] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Revised: 11/25/2015] [Accepted: 12/10/2015] [Indexed: 11/22/2022]
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82
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Wei X, Cohen R, Barenholz Y. Insights into composition/structure/function relationships of Doxil® gained from "high-sensitivity" differential scanning calorimetry. Eur J Pharm Biopharm 2016; 104:260-70. [PMID: 27106607 DOI: 10.1016/j.ejpb.2016.04.011] [Citation(s) in RCA: 50] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/21/2016] [Accepted: 04/18/2016] [Indexed: 12/11/2022]
Abstract
Thermotropic behavior of Doxil® and its generic, Lipodox®, was characterized using "high-sensitivity" differential scanning calorimetry (DSC). This is the first report that two distinct endotherms were observed in Doxil and Lipodox upon heating. The first (Tm at 51±2°C) is broad and of low enthalpy, representing the membrane lipid phase transition, which occurs despite having high (38mole%) cholesterol. The second (Tm at ∼70°C) is narrow, representing melting of the intraliposomal doxorubicin-sulfate nanocrystals. The thermograms of Doxil and Lipodox are practically identical. The membrane phase transition is similar to that of drug-free nanoliposomes of the same size and lipid composition as Doxil, suggesting lack of significant drug-membrane interaction. The melting endotherm of the intraliposomal nanocrystals is 2.0-2.5-fold narrower than that of the crystals formed in a solution of 250mM ammonium sulfate and >60mg/ml doxorubicin. This suggests that nanovolume of liposomes improves doxorubicin-sulfate crystallinity. Moreover, both phase transitions are reversible in cycled DSC scanning (15-90-15°C). This indicates an unexpected "non-leaky" phospholipid phase transition and excellent physical and chemical stabilities of Doxil after short exposure to high temperature. Reducing mole% of cholesterol results in a "leaky" membrane phase transition of higher enthalpy. Namely, high mole% cholesterol is essential for the resistance to drug leakage during phase transition. Pegylated liposomal doxorubicin in which HSPC was replaced by DPPC shows the same non-leaky phase transition but at a lower temperature, indicating this type of phase transition is not unique to Doxil. The presence of DSPE-PEG2k increases the cooperativity of the phase transition. High-sensitivity DSC helps illuminate composition/structure/function relationships of Doxil, and is useful for the equivalence/similarity studies.
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Affiliation(s)
- Xiaohui Wei
- Laboratory of Membrane and Liposome Research, The Hebrew University-Hadassah Medical School, IMRIC, Jerusalem, Israel; School of Pharmacy, Shanghai Jiao Tong University, Shanghai, China
| | - Rivka Cohen
- Laboratory of Membrane and Liposome Research, The Hebrew University-Hadassah Medical School, IMRIC, Jerusalem, Israel
| | - Yechezkel Barenholz
- Laboratory of Membrane and Liposome Research, The Hebrew University-Hadassah Medical School, IMRIC, Jerusalem, Israel.
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83
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Alizadeh Noghani M, Brooks DE. Progesterone binding nano-carriers based on hydrophobically modified hyperbranched polyglycerols. NANOSCALE 2016; 8:5189-5199. [PMID: 26878269 DOI: 10.1039/c5nr08175k] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Progesterone (Pro) is a potent neurosteroid and promotes recovery from moderate Traumatic Brain Injury but its clinical application is severely impeded by its poor water solubility. Here we demonstrate that reversibly binding Pro within hydrophobically modified hyperbranched polyglycerol (HPG-Cn-MPEG) enhances its solubility, stability and bioavailability. Synthesis, characterization and Pro loading into HPG-Cn-MPEG is described. The release kinetics are correlated with structural properties and the results of Differential Scanning Calorimetry studies of a family of HPG-Cn-MPEGs of varying molecular weight and alkylation. While the maximum amount of Pro bound correlates well with the amount of alkyl carbon per molecule contributing to its hydrophobicity, the dominant first order rate constant for Pro release correlates strongly with the amount of structured or bound water in the dendritic domain of the polymer. The results provide evidence to justify more detailed studies of interactions with biological systems, both single cells and in animal models.
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Affiliation(s)
- M Alizadeh Noghani
- Centre for Blood Research and Departments of Chemistry, University of British Columbia, Vancouver, BC, Canada V6T 1Z3
| | - D E Brooks
- Centre for Blood Research and Departments of Chemistry, University of British Columbia, Vancouver, BC, Canada V6T 1Z3 and Centre for Blood Research and Departments of Chemistry and of Pathology and Laboratory Medicine, University of British Columbia, Vancouver, BC, Canada V6T 1Z3.
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84
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Shih R, Lee AP. Post-Formation Shrinkage and Stabilization of Microfluidic Bubbles in Lipid Solution. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2016; 32:1939-1946. [PMID: 26820229 DOI: 10.1021/acs.langmuir.5b03948] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Medical ultrasound imaging often employs ultrasound contrast agents (UCAs), injectable microbubbles stabilized by shells or membranes. In tissue, the compressible gas cores can strongly scatter acoustic signals, resonate, and emit harmonics. However, bubbles generated by conventional methods have nonuniform sizes, reducing the fraction that resonates with a given transducer. Microfluidic flow-focusing is an alternative production method which generates highly monodisperse bubbles with uniform constituents, enabling more-efficient contrast enhancement than current UCAs. Production size is tunable by adjusting gas pressure and solution flow rate, but solution effects on downstream stable size and lifetime have not been closely examined. This study therefore investigated several solution parameters, including the DSPC/DSPE-PEG2000 lipid ratio, concentration, viscosity, and preparation temperature to determine their effects on stabilization. It was found that bubble lifetime roughly correlated with stable size, which in turn was strongly influenced by primary-lipid-to-emulsifier ratio, analogous to its effects on conventional bubble yield and Langmuir-trough compressibility in existing studies. Raising DSPE-PEG2000 fraction in solution reduced bubble surface area in proportion to its reduction of lipid packing density at low compression in literature. In addition, the surface area was found to increase proportionately with lipid concentration above 2.1 mM. However, viscosities above or below 2.3-3.3 mPa·s seemed to reduce bubble size. Finally, lipid preparation at room temperature led to smaller bubbles compared to preparation near or above the primary lipid's phase transition point. Understanding these effects will further improve on postformation control over microfluidic bubble production, and facilitate size-tuning for optimal contrast enhancement.
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Affiliation(s)
- Roger Shih
- Department of Biomedical Engineering, University of California Irvine , 3406 Engineering Hall, Irvine, California 92697, United States
| | - Abraham P Lee
- Department of Biomedical Engineering, University of California Irvine , 3406 Engineering Hall, Irvine, California 92697, United States
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85
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Zan T, Wu F, Pei X, Jia S, Zhang R, Wu S, Niu Z, Zhang Z. Into the polymer brush regime through the "grafting-to" method: densely polymer-grafted rodlike viruses with an unusual nematic liquid crystal behavior. SOFT MATTER 2016; 12:798-805. [PMID: 26531814 DOI: 10.1039/c5sm02015h] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The current work reports an intriguing discovery of how the force exerted on protein complexes like filamentous viruses by the strong interchain repulsion of polymer brushes can induce subtle changes of the constituent subunits at the molecular scale. Such changes transform into the macroscopic rearrangement of the chiral ordering of the rodlike virus in three dimensions. For this, a straightforward "grafting-to" PEGylation method has been developed to densely graft a filamentous virus with poly(ethylene glycol) (PEG). The grafting density is so high that PEG is in the polymer brush regime, resulting in straight and thick rodlike particles with a thin viral backbone. Scission of the densely PEGylated viruses into fragments was observed due to the steric repulsion of the PEG brush, as facilitated by adsorption onto a mica surface. The high grafting density of PEG endows the virus with an isotropic-nematic (I-N) liquid crystal (LC) phase transition that is independent of the ionic strength and the densely PEGylated viruses enter into the nematic LC phase at much lower virus concentrations. Most importantly, while the intact virus and the one grafted with PEG of low grafting density can form a chiral nematic LC phase, the densely PEGylated viruses only form a pure nematic LC phase. This can be traced back to the secondary to tertiary structural change of the major coat protein of the virus, driven by the steric repulsion of the PEG brush. Quantitative parameters characterising the conformation of the grafted PEG derived from the grafting density or the I-N LC transition are elegantly consistent with the theoretical prediction.
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Affiliation(s)
- Tingting Zan
- School of Chemical Engineering and Technology, Tianjin University, Tianjin 300072, China.
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86
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Schilt Y, Berman T, Wei X, Barenholz Y, Raviv U. Using solution X-ray scattering to determine the high-resolution structure and morphology of PEGylated liposomal doxorubicin nanodrugs. Biochim Biophys Acta Gen Subj 2016; 1860:108-19. [DOI: 10.1016/j.bbagen.2015.09.012] [Citation(s) in RCA: 61] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Revised: 09/02/2015] [Accepted: 09/15/2015] [Indexed: 11/28/2022]
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87
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Wawro AM, Muraoka T, Kinbara K. Chromatography-free synthesis of monodisperse oligo(ethylene glycol) mono-p-toluenesulfonates and quantitative analysis of oligomer purity. Polym Chem 2016. [DOI: 10.1039/c6py00127k] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Oligo(ethylene glycol) monotosylates are prepared on a multigram scale and in high purity with a new chromatography-free process.
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Affiliation(s)
- Adam M. Wawro
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
| | - Takahiro Muraoka
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
- Graduate School of Bioscience and Biotechnology
| | - Kazushi Kinbara
- Institute of Multidisciplinary Research for Advanced Materials
- Tohoku University
- Sendai 980-8577
- Japan
- Graduate School of Bioscience and Biotechnology
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88
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Lopes AM, Oliveira-Nascimento LD, Ribeiro A, Tairum CA, Breyer CA, Oliveira MAD, Monteiro G, Souza-Motta CMD, Magalhães PDO, Avendaño JGF, Cavaco-Paulo AM, Mazzola PG, Rangel-Yagui CDO, Sette LD, Converti A, Pessoa A. Therapeuticl-asparaginase: upstream, downstream and beyond. Crit Rev Biotechnol 2015; 37:82-99. [DOI: 10.3109/07388551.2015.1120705] [Citation(s) in RCA: 85] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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89
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Hayashi K, Iwai H, Shimanouchi T, Umakoshi H, Iwasaki T, Kato A, Nakamura H. Formation of lens-like vesicles induced via microphase separations on a sorbitan monoester membrane with different headgroups. Colloids Surf B Biointerfaces 2015; 135:235-242. [DOI: 10.1016/j.colsurfb.2015.07.071] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/23/2015] [Revised: 07/23/2015] [Accepted: 07/27/2015] [Indexed: 12/23/2022]
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90
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Nogueira E, Gomes AC, Preto A, Cavaco-Paulo A. Design of liposomal formulations for cell targeting. Colloids Surf B Biointerfaces 2015; 136:514-26. [PMID: 26454541 DOI: 10.1016/j.colsurfb.2015.09.034] [Citation(s) in RCA: 114] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Revised: 09/16/2015] [Accepted: 09/18/2015] [Indexed: 01/04/2023]
Abstract
Liposomes have gained extensive attention as carriers for a wide range of drugs due to being both nontoxic and biodegradable as they are composed of substances naturally occurring in biological membranes. Active targeting for cells has explored specific modification of the liposome surface by functionalizing it with specific targeting ligands in order to increase accumulation and intracellular uptake into target cells. None of the Food and Drug Administration-licensed liposomes or lipid nanoparticles are coated with ligands or target moieties to delivery for homing drugs to target tissues, cells or subcellular organelles. Targeted therapies (with or without controlled drug release) are an emerging and relevant research area. Despite of the numerous liposomes reviews published in the last decades, this area is in constant development. Updates urgently needed to integrate new advances in targeted liposomes research. This review highlights the evolution of liposomes from passive to active targeting and challenges in the development of targeted liposomes for specific therapies.
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Affiliation(s)
- Eugénia Nogueira
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal; CEB-Centre of Biological Engineering, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Andreia C Gomes
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Ana Preto
- CBMA-Centre of Molecular and Environmental Biology, Department of Biology, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal
| | - Artur Cavaco-Paulo
- CEB-Centre of Biological Engineering, University of Minho, Campus of Gualtar, 4710-057 Braga, Portugal.
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91
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Accardo A, Morelli G. Review peptide-targeted liposomes for selective drug delivery: Advantages and problematic issues. Biopolymers 2015; 104:462-79. [DOI: 10.1002/bip.22678] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2015] [Revised: 04/01/2015] [Accepted: 05/04/2015] [Indexed: 01/18/2023]
Affiliation(s)
- Antonella Accardo
- Department of Pharmacy; CIRPeB, University of Naples “Federico II” and Invectors srl; 80134 Napoli Italy
| | - Giancarlo Morelli
- Department of Pharmacy; CIRPeB, University of Naples “Federico II” and Invectors srl; 80134 Napoli Italy
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92
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Silva JM, Vandermeulen G, Oliveira VG, Pinto SN, Rodrigues C, Salgado A, Afonso CA, Viana AS, Jérôme C, Silva LC, Graca L, Préat V, Florindo HF. Development of functionalized nanoparticles for vaccine delivery to dendritic cells: a mechanistic approach. Nanomedicine (Lond) 2015; 9:2639-56. [PMID: 25529568 DOI: 10.2217/nnm.14.135] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023] Open
Abstract
AIM Produce biodegradable nanoparticles to target antigen-presenting cells (APCs) and evaluate their potential to be used as a vaccine delivery system. MATERIALS & METHODS Untargeted PEGylated poly(d,l-lactic-co-glycolide)-based nanoparticles and mannose-grafted nanoparticles were formulated and physicochemically characterized. Immortalized and primary APCs were used to study nanoparticle internalization patterns. The endocytic pathways and intracellular trafficking followed by nanoparticles were also investigated. RESULTS & DISCUSSION Nanoparticles displayed mannose residues available for binding at the nanoparticle surface. Different nanoparticle internalization patterns by immortalized and primary APCs were verified. Macropinocytosis, clathrin-mediated endocytosis, caveolin- and lipid raft-dependent endocytosis are involved in nanoparticles internalization. Nanoparticles demonstrate both endolysosomal and cytosolic localizations and a tendency to accumulate nearby the endoplasmic reticulum. CONCLUSION The developed nanoparticles might drive antigens to be presented through MHC class I and II molecules to both CD8(+) and CD4(+) T cells, favoring a complete and coordinated immune response.
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Affiliation(s)
- Joana M Silva
- Faculdade de Farmácia, Universidade de Lisboa, Instituto de Investigação do Medicamento (iMed.ULisboa), Lisbon, Portugal
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93
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Effects of the PEG molecular weight of a PEG-lipid and cholesterol on PEG chain flexibility on liposome surfaces. Colloids Surf A Physicochem Eng Asp 2015. [DOI: 10.1016/j.colsurfa.2015.03.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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94
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Dzieciuch M, Rissanen S, Szydłowska N, Bunker A, Kumorek M, Jamróz D, Vattulainen I, Nowakowska M, Róg T, Kepczynski M. PEGylated Liposomes as Carriers of Hydrophobic Porphyrins. J Phys Chem B 2015; 119:6646-57. [DOI: 10.1021/acs.jpcb.5b01351] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Monika Dzieciuch
- Faculty
of Chemistry, Jagiellonian University, Krakow 31-007, Poland
| | - Sami Rissanen
- Department
of Physics, Tampere University of Technology, Tampere 33720, Finland
| | | | - Alex Bunker
- Centre
for Drug Research, Faculty of Pharmacy, University of Helsinki, Helsinki 00100, Finland
| | - Marta Kumorek
- Faculty
of Chemistry, Jagiellonian University, Krakow 31-007, Poland
| | - Dorota Jamróz
- Faculty
of Chemistry, Jagiellonian University, Krakow 31-007, Poland
| | - Ilpo Vattulainen
- Department
of Physics, Tampere University of Technology, Tampere 33720, Finland
- MEMPHYS-Center
for Biomembrane Physics, University of Southern Denmark, Odense 5230, Denmark
| | - Maria Nowakowska
- Faculty
of Chemistry, Jagiellonian University, Krakow 31-007, Poland
| | - Tomasz Róg
- Department
of Physics, Tampere University of Technology, Tampere 33720, Finland
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95
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Nakamura M, Hayashi K, Nakano M, Kanadani T, Miyamoto K, Kori T, Horikawa K. Identification of polyethylene glycol-resistant macrophages on stealth imaging in vitro using fluorescent organosilica nanoparticles. ACS NANO 2015; 9:1058-1071. [PMID: 25629765 DOI: 10.1021/nn502319r] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
An in vitro imaging system to evaluate the stealth function of nanoparticles against mouse macrophages was established using fluorescent organosilica nanoparticles. Surface-functionalized organosilica nanoparticles with polyethylene glycol (PEG) were prepared by a one-step process, resulting in a brush-type PEG layer. A simultaneous dual-particle administration approach enabled us to evaluate the stealth function of nanoparticles with respect to single cells using time-lapse fluorescent microscopic imaging and flow cytometry analyses. Single-cell imaging and analysis revealed various patterns and kinetics of bare and PEGylated nanoparticle uptake. The PEGylated nanoparticles revealed a stealth function against most macrophages (PEG-sensitive macrophages); however, a stealth function against certain macrophages (PEG-insensitive macrophages) was not observed. We identified and characterized the PEG-resistant macrophages that could take up PEGylated nanoparticles at the same level as bare nanoparticles.
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Affiliation(s)
- Michihiro Nakamura
- Department of Anatomy and Cell Biology, The University of Tokushima Graduate School of Medical Sciences , 3-18-15 Kuramoto, Tokushima 770-8503, Japan
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96
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Yang Q, Lai SK. Anti-PEG immunity: emergence, characteristics, and unaddressed questions. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2015; 7:655-77. [PMID: 25707913 DOI: 10.1002/wnan.1339] [Citation(s) in RCA: 378] [Impact Index Per Article: 42.0] [Reference Citation Analysis] [Abstract] [Subscribe] [Scholar Register] [Received: 10/13/2014] [Revised: 01/07/2015] [Accepted: 01/18/2015] [Indexed: 12/22/2022]
Abstract
The modification of protein and nanoparticle therapeutics with polyethylene glycol (PEG), a flexible, uncharged, and highly hydrophilic polymer, is a widely adopted approach to reduce RES clearance, extend circulation time, and improve drug efficacy. Nevertheless, an emerging body of literature, generated by numerous research groups, demonstrates that the immune system can produce antibodies that specifically bind PEG, which can lead to the 'accelerated blood clearance' of PEGylated therapeutics. In animals, anti-PEG immunity is typically robust but short-lived and consists of a predominantly anti-PEG IgM response. Rodent studies suggest that the induction of anti-PEG antibodies (α-PEG Abs) primarily occurs through a type 2 T-cell independent mechanism. Although anti-PEG immunity is less well-studied in humans, the presence of α-PEG Abs has been correlated with reduced efficacy of PEGylated therapeutics in clinical trials. The prevalence of anti-PEG IgG and reports of memory immune responses, as well as the existence of α-PEG Abs in healthy untreated individuals, suggests that the mechanism(s) and features of human anti-PEG immune responses may differ from those of animal models. Many questions, including the incidence rate of pre-existing α-PEG Abs and immunological mechanism(s) of α-PEG Ab formation in humans, must be answered in order to fully address the potential complications of anti-PEG immunity.
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Affiliation(s)
- Qi Yang
- Division of Molecular Pharmaceutics, University of North Carolina, Chapel Hill, NC, USA
| | - Samuel K Lai
- Division of Molecular Pharmaceutics, University of North Carolina, Chapel Hill, NC, USA.,UNC/NCSU Joint Department of Biomedical Engineering, University of North Carolina, Chapel Hill, NC, USA
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97
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Nag OK, Yadav VR, Croft B, Hedrick A, Awasthi V. Liposomes Modified with Superhydrophilic Polymer Linked to a Nonphospholipid Anchor Exhibit Reduced Complement Activation and Enhanced Circulation. J Pharm Sci 2015; 104:114-23. [DOI: 10.1002/jps.24254] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2014] [Revised: 10/07/2014] [Accepted: 10/13/2014] [Indexed: 01/23/2023]
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98
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Kinnear C, Burnand D, Clift MJD, Kilbinger AFM, Rothen-Rutishauser B, Petri-Fink A. Polyvinylalkohol als biokompatibles Polymer zur Passivierung von Goldnanostäbchen. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201404100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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99
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100
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Impact of atomization technique on the stability and transport efficiency of nebulized liposomes harboring different surface characteristics. Eur J Pharm Biopharm 2014; 88:1076-85. [DOI: 10.1016/j.ejpb.2014.10.009] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2014] [Revised: 10/13/2014] [Accepted: 10/15/2014] [Indexed: 01/02/2023]
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