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Xing D, Tang L, Yang H, Yan M, Yuan P, Wu Y, Zhang Y, Yin T, Wang Y, Gou J, Tang X, He H. Effect of mPEG-PLGA on Drug Crystallinity and Release of Long-Acting Injection Microspheres: In Vitro and In Vivo Perspectives. Pharm Res 2024; 41:1271-1284. [PMID: 38839720 DOI: 10.1007/s11095-024-03717-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2024] [Accepted: 05/16/2024] [Indexed: 06/07/2024]
Abstract
PURPOSE Traditional progesterone (PRG) injections require long-term administration, leading to poor patient compliance. The emergence of long-acting injectable microspheres extends the release period to several days or even months. However, these microspheres often face challenges such as burst release and incomplete drug release. This study aims to regulate drug release by altering the crystallinity of the drug during the release process from the microspheres. METHODS This research incorporates methoxy poly(ethylene glycol)-b-poly(lactide-co-glycolide) (mPEG-PLGA) into poly(lactide-co-glycolide) (PLGA) microspheres to enhance their hydrophilicity, thus regulating the release rate and drug morphology during release. This modification aims to address the issues of burst and incomplete release in traditional PLGA microspheres. PRG was used as the model drug. PRG/mPEG-PLGA/PLGA microspheres (PmPPMs) were prepared via an emulsification-solvent evaporation method. Scanning electron microscopy (SEM), powder X-ray diffraction (PXRD), and differential scanning calorimetry (DSC) were employed to investigate the presence of PRG in PmPPMs and its physical state changes during release. RESULTS The addition of mPEG-PLGA altered the crystallinity of the drug within the microspheres at different release stages. The crystallinity correlated positively with the amount of mPEG-PLGA incorporated; the greater the amount, the faster the drug release from the formulation. The bioavailability and muscular irritation of the long-acting injectable were assessed through pharmacokinetic and muscle irritation studies in Sprague-Dawley (SD) rats. The results indicated that PmPPMs containing mPEG-PLGA achieved low burst release and sustained release over 7 days, with minimal irritation and self-healing within this period. PmPPMs with 5% mPEG-PLGA showed a relative bioavailability (Frel) of 146.88%. IN CONCLUSION In summary, adding an appropriate amount of mPEG to PLGA microspheres can alter the drug release process and enhance bioavailability.
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Affiliation(s)
- Dandan Xing
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Lihua Tang
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Hongyu Yang
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Mingjiao Yan
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Panao Yuan
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Yulan Wu
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Yu Zhang
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Tian Yin
- Department of Functional Food and Wine, Shenyang Pharmaceutical University, Shenyang, 110016, China
| | - Yanjiao Wang
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Jingxin Gou
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Xing Tang
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China
| | - Haibing He
- Department of Pharmaceutics Science, Shenyang Pharmaceutical University, Wenhua Road 103, Shenyang, 110016, People's Republic of China.
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Marcello E, Chiono V. Biomaterials-Enhanced Intranasal Delivery of Drugs as a Direct Route for Brain Targeting. Int J Mol Sci 2023; 24:ijms24043390. [PMID: 36834804 PMCID: PMC9964911 DOI: 10.3390/ijms24043390] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2022] [Revised: 01/22/2023] [Accepted: 02/02/2023] [Indexed: 02/11/2023] Open
Abstract
Intranasal (IN) drug delivery is a non-invasive and effective route for the administration of drugs to the brain at pharmacologically relevant concentrations, bypassing the blood-brain barrier (BBB) and minimizing adverse side effects. IN drug delivery can be particularly promising for the treatment of neurodegenerative diseases. The drug delivery mechanism involves the initial drug penetration through the nasal epithelial barrier, followed by drug diffusion in the perivascular or perineural spaces along the olfactory or trigeminal nerves, and final extracellular diffusion throughout the brain. A part of the drug may be lost by drainage through the lymphatic system, while a part may even enter the systemic circulation and reach the brain by crossing the BBB. Alternatively, drugs can be directly transported to the brain by axons of the olfactory nerve. To improve the effectiveness of drug delivery to the brain by the IN route, various types of nanocarriers and hydrogels and their combinations have been proposed. This review paper analyzes the main biomaterials-based strategies to enhance IN drug delivery to the brain, outlining unsolved challenges and proposing ways to address them.
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Affiliation(s)
- Elena Marcello
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Turin, Italy
- Interuniversity Center for the Promotion of 3Rs Principles in Teaching and Research, Centro 3R, 56122 Pisa, Italy
| | - Valeria Chiono
- Department of Mechanical and Aerospace Engineering, Politecnico di Torino, Corso Duca Degli Abruzzi 24, 10129 Turin, Italy
- Interuniversity Center for the Promotion of 3Rs Principles in Teaching and Research, Centro 3R, 56122 Pisa, Italy
- Institute for Chemical-Physical Processes, National Research Council (CNR-IPCF), 56124 Pisa, Italy
- Correspondence:
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Wang Y, Liu X, Quan X, Qin X, Zhou Y, Liu Z, Chao Z, Jia C, Qin H, Zhang H. Pigment epithelium-derived factor and its role in microvascular-related diseases. Biochimie 2022; 200:153-171. [DOI: 10.1016/j.biochi.2022.05.019] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2021] [Revised: 05/19/2022] [Accepted: 05/30/2022] [Indexed: 01/02/2023]
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Zhou YL, Yang QQ, Yan YY, Zhang L, Wang QH, Ju F, Tang JB. Gene-Loaded Nanoparticle-Coated Sutures Provide Effective Gene Delivery to Enhance Tendon Healing. Mol Ther 2019; 27:1534-1546. [PMID: 31278034 DOI: 10.1016/j.ymthe.2019.05.024] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2018] [Revised: 05/18/2019] [Accepted: 05/28/2019] [Indexed: 12/31/2022] Open
Abstract
How to accelerate tendon healing remains a clinical challenge. In this study, a suture carrying nanoparticle/pEGFP-basic fibroblast growth factor (bFGF) and pEGFP-vascular endothelial growth factor A (VEGFA) complexes was developed to transfer the growth factor genes into injured tendon tissues to promote healing. Polydopamine-modified sutures can uniformly and tightly absorb nanoparticle/plasmid complexes. After tendon tissues were sutured, the nanoparticle/plasmid complexes still existed on the suture surface. Further, we found that the nanoparticle/plasmid complexes delivered into tendon tissues could diffuse from sutures to tendon tissues and effectively transfect genes into tendon cells, significantly increasing the expression of growth factors in tendon tissues. Finally, biomechanical tests showed that nanoparticle/pEGFP-bFGF and pEGFP-VEGFA complex-coated sutures could significantly increase the ultimate strengths of repaired tendons, especially at 4 weeks after operation. Two kinds of nanoparticle/plasmid complex-coated sutures significantly increased flexor tendon healing strength by 3.7 times for Ethilon and 5.8 times for PDS II, respectively, compared with the corresponding unmodified sutures. In the flexor tendon injury model, at 6 weeks after surgery, compared with the control suture, the nanoparticle/plasmid complex-coated sutures can significantly increase the gliding excursions of the tendon and inhibit the formation of adhesion. These results indicate that this nanoparticle/plasmid complex-coated suture is a promising tool for the treatment of injured tendons.
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Affiliation(s)
- You Lang Zhou
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China.
| | - Qian Qian Yang
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China
| | - Ying Ying Yan
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China
| | - Luzhong Zhang
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China
| | - Qiu Hong Wang
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China
| | - Fei Ju
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China
| | - Jin Bo Tang
- The Nanomedicine Research Laboratory, Research for Frontier Medicine and Hand Surgery Research Center, Department of Hand Surgery, Affiliated Hospital of Nantong University, Nantong 226001, Jiangsu, China.
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Liu J, Xu Y, Wang Y, Ren H, Meng Z, Liu K, Liu Z, Huang H, Li X. Proton Oriented-"Smart Depot" for Responsive Release of Ca 2+ to Inhibit Peptide Acylation in PLGA Microspheres. Pharm Res 2019; 36:119. [PMID: 31165279 DOI: 10.1007/s11095-019-2640-5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2018] [Accepted: 05/06/2019] [Indexed: 12/17/2022]
Abstract
PURPOSE The purpose of this study was to characterize and detail the mechanism of a smart Ca2+ release depot (Ca3(PO4)2) about its ability for sustainable inhibition on peptide acylation within PLGA microspheres. METHODS The octreotide acetate release and acylation kinetics were analyzed by RP-HPLC. Changes of Ca2+ concentration and adsorption behavior were determined by a Calcium Colorimetric Assay Kit. The inner pH changes were delineated by a classic pH sensitive probe, Lysosensor yellow/ blue® dextran. Morphological changes of microspheres, adsorption between polymer and additive, transformation of Ca3(PO4)2 were characterized using SEM, FTIR and SSNMR separately. RESULTS Before and after microspheres formulation, the property and effectiveness of Ca3(PO4)2 were investigated. Compared with a commonly used calcium salt (CaCl2), high encapsulation efficiency (96.56%) of Ca3(PO4)2 guarantees lasting effectiveness. In an increasingly acidic environment that simulated polymer degradation, the poorly water-soluble Ca3(PO4)2 could absorb protons and transform into the more and more soluble CaHPO4 and Ca(H2PO4)2 to produce sufficient Ca2+ according to severity of acylation. The corresponding Ca2+ produce capacity fully met the optimum inhibition requirement since the real-time adsorption sites (water-soluble carboxylic acids) inside the degrading microspheres were rare. A sustained retention of three switchable calcium salts and slow release of Ca2+ were observed during the microsphere incubation. FTIR results confirmed the long-term inhibition effect induced by Ca3(PO4)2 on the adsorption between drug and polymer. CONCLUSIONS With the presence of the smart Ca2+ depot (Ca3(PO4)2) in the microspheres, a sustainable and long-term inhibition of peptide acylation was achieved.
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Affiliation(s)
- Jiwei Liu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Yan Xu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Yonglu Wang
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Hao Ren
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Zhengjie Meng
- School of Biotechnology and Pharmaceutical Engineering, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Kuntang Liu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - Zhe Liu
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China
| | - He Huang
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China.
| | - Xueming Li
- School of Pharmaceutical Science, Nanjing Tech University, No. 30 Puzhu South Road, Nanjing, 211816, China.
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Lee PW, Pokorski JK. Poly(lactic-co-glycolic acid) devices: Production and applications for sustained protein delivery. WILEY INTERDISCIPLINARY REVIEWS. NANOMEDICINE AND NANOBIOTECHNOLOGY 2018; 10:e1516. [PMID: 29536634 PMCID: PMC6136991 DOI: 10.1002/wnan.1516] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/14/2017] [Revised: 01/30/2018] [Accepted: 02/14/2018] [Indexed: 12/12/2022]
Abstract
Injectable or implantable poly(lactic-co-glycolic acid) (PLGA) devices for the sustained delivery of proteins have been widely studied and utilized to overcome the necessity of repeated administrations for therapeutic proteins due to poor pharmacokinetic profiles of macromolecular therapies. These devices can come in the form of microparticles, implants, or patches depending on the disease state and route of administration. Furthermore, the release rate can be tuned from weeks to months by controlling the polymer composition, geometry of the device, or introducing additives during device fabrication. Slow-release devices have become a very powerful tool for modern medicine. Production of these devices has initially focused on emulsion-based methods, relying on phase separation to encapsulate proteins within polymeric microparticles. Process parameters and the effect of additives have been thoroughly researched to ensure protein stability during device manufacturing and to control the release profile. Continuous fluidic production methods have also been utilized to create protein-laden PLGA devices through spray drying and electrospray production. Thermal processing of PLGA with solid proteins is an emerging production method that allows for continuous, high-throughput manufacturing of PLGA/protein devices. Overall, polymeric materials for protein delivery remain an emerging field of research for the creation of single administration treatments for a wide variety of disease. This review describes, in detail, methods to make PLGA devices, comparing traditional emulsion-based methods to emerging methods to fabricate protein-laden devices. This article is categorized under: Biology-Inspired Nanomaterials > Protein and Virus-Based Structures Implantable Materials and Surgical Technologies > Nanomaterials and Implants Biology-Inspired Nanomaterials > Peptide-Based Structures.
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Affiliation(s)
- Parker W. Lee
- Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
| | - Jonathan K. Pokorski
- Department of Macromolecular Science and Engineering, School of Engineering, Case Western Reserve University, Cleveland, Ohio 44106, United States
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7
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Bokharaei M, Saatchi K, Häfeli UO. A single microfluidic chip with dual surface properties for protein drug delivery. Int J Pharm 2017; 521:84-91. [DOI: 10.1016/j.ijpharm.2017.02.026] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2016] [Revised: 01/25/2017] [Accepted: 02/09/2017] [Indexed: 10/20/2022]
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8
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Rietscher R, Schröder M, Janke J, Czaplewska J, Gottschaldt M, Scherließ R, Hanefeld A, Schubert US, Schneider M, Knolle PA, Lehr CM. Antigen delivery via hydrophilic PEG-b-PAGE-b-PLGA nanoparticles boosts vaccination induced T cell immunity. Eur J Pharm Biopharm 2016; 102:20-31. [PMID: 26940132 DOI: 10.1016/j.ejpb.2016.02.014] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 02/16/2016] [Accepted: 02/19/2016] [Indexed: 01/01/2023]
Abstract
Here, we evaluate the use of hydrophilic PEG-b-PAGE-b-PLGA (PPP) for the preparation of antigen loaded nanoparticles (NPs) as a platform for prophylactic vaccination. To investigate the suitability of PPP-NPs for antigen delivery, we used the double emulsion evaporation technique to prepare NPs of different sizes, antigen-loading efficiencies and -release kinetics for the model antigen Ovalbumin (OVA). Prior to applying the PPP-NPs in biological in vitro or in vivo models, all materials were tested for absence of cytotoxicity and endotoxins. While the uptake of NPs in antigen presenting cells was size but not polymer dependent, the efficiency of cross presentation of NP-associated antigen on MHC I molecules for CD8 T cell activation depended on the polymer type. T cell activation by antigen-presenting cells was significantly increased in vitro if antigen was delivered via PPP NPs compared to PLGA NPs or soluble OVA, although antigen content was the same in all tested formulations. Subcutaneous application of PPP-OVA-NPs even without adjuvants led to generation of potent CD8 T cell-mediated OVA-specific cytotoxicity in vivo that was more pronounced than after application of OVA alone or PLGA-OVA-NPs. Our data suggest that PPP-NPs can serve as platform for antigen-delivery in future vaccination formulations. Although PPP-NPs already bear intrinsic adjuvant-function, the complementation with TLR ligands loaded inside NPs may further strengthen the immune response to a point, where it might be possible to use it as a therapeutic vaccine to break immune tolerance in chronic disease states.
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Affiliation(s)
- René Rietscher
- Department of Drug Delivery (DDEL), Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research, Saarland University, Saarbrücken, Germany
| | - Matthias Schröder
- BioMed X Innovation Center, Heidelberg, Germany; Institute of Molecular Immunology, Technische Universität München, Munich, Germany
| | - Julia Janke
- Department of Pharmaceutics and Biopharmaceutics, Christian Albrecht University Kiel, Kiel, Germany
| | - Justyna Czaplewska
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich-Schiller University, Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich-Schiller University, Jena, Germany
| | - Michael Gottschaldt
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich-Schiller University, Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich-Schiller University, Jena, Germany
| | - Regina Scherließ
- Department of Pharmaceutics and Biopharmaceutics, Christian Albrecht University Kiel, Kiel, Germany
| | | | - Ulrich S Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC), Friedrich-Schiller University, Jena, Germany; Jena Center for Soft Matter (JCSM), Friedrich-Schiller University, Jena, Germany
| | - Marc Schneider
- Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, Saarbrücken, Germany
| | - Percy A Knolle
- Institute of Molecular Immunology, Technische Universität München, Munich, Germany
| | - Claus-Michael Lehr
- Department of Drug Delivery (DDEL), Helmholtz Institute for Pharmaceutical Research Saarland (HIPS), Helmholtz Center for Infection Research, Saarland University, Saarbrücken, Germany; Department of Pharmacy, Biopharmaceutics and Pharmaceutical Technology, Saarland University, Saarbrücken, Germany.
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Caolo V, Vries M, Zupancich J, Houben M, Mihov G, Wagenaar A, Swennen G, Nossent Y, Quax P, Suylen D, Dijkgraaf I, Molin D, Hackeng T, Post M. CXCL1 microspheres: a novel tool to stimulate arteriogenesis. Drug Deliv 2015; 23:2919-2926. [PMID: 26651867 DOI: 10.3109/10717544.2015.1120366] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
CONTEXT After arterial occlusion, diametrical growth of pre-existing natural bypasses around the obstruction, i.e. arteriogenesis, is the body's main coping mechanism. We have shown before that continuous infusion of chemokine (C-X-C motif) ligand 1 (CXCL1) promotes arteriogenesis in a rodent hind limb ischemia model. OBJECTIVE For clinical translation of these positive results, we developed a new administration strategy of local and sustained delivery. Here, we investigate the therapeutic potential of CXCL1 in a drug delivery system based on microspheres. MATERIALS AND METHODS We generated poly(ester amide) (PEA) microspheres loaded with CXCL1 and evaluated them in vitro for cellular toxicity and chemokine release characteristics. In vivo, murine femoral arteries were ligated and CXCL1 was administered either intra-arterially via osmopump or intramuscularly encapsulated in biodegradable microspheres. Perfusion recovery was measured with Laser-Doppler. RESULTS The developed microspheres were not cytotoxic and displayed a sustained chemokine release up to 28 d in vitro. The amount of released CXCL1 was 100-fold higher than levels in native ligated hind limb. Also, the CXCL1-loaded microspheres significantly enhanced perfusion recovery at day 7 after ligation compared with both saline and non-loaded conditions (55.4 ± 5.0% CXCL1-loaded microspheres versus 43.1 ± 4.5% non-loaded microspheres; n = 8-9; p < 0.05). On day 21 after ligation, the CXCL1-loaded microspheres performed even better than continuous CXCL1 administration (102.1 ± 4.4% CXCL1-loaded microspheres versus 85.7 ± 4.8% CXCL1 osmopump; n = 9; p < 0.05). CONCLUSION Our results demonstrate a proof of concept that sustained, local delivery of CXCL1 encapsulated in PEA microspheres provides a new tool to stimulate arteriogenesis in vivo.
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Affiliation(s)
- Vincenza Caolo
- a Department of Physiology , CARIM, Maastricht University , The Netherlands
| | - Mark Vries
- a Department of Physiology , CARIM, Maastricht University , The Netherlands
| | | | | | | | - Allard Wagenaar
- a Department of Physiology , CARIM, Maastricht University , The Netherlands
| | - Geertje Swennen
- a Department of Physiology , CARIM, Maastricht University , The Netherlands
| | - Yaël Nossent
- d Department of Surgery , Leiden University Medical Center , The Netherlands , and
| | - Paul Quax
- d Department of Surgery , Leiden University Medical Center , The Netherlands , and
| | - Dennis Suylen
- e Department of Biochemistry , CARIM, Maastricht University , The Netherlands
| | - Ingrid Dijkgraaf
- e Department of Biochemistry , CARIM, Maastricht University , The Netherlands
| | - Daniel Molin
- a Department of Physiology , CARIM, Maastricht University , The Netherlands
| | - Tilman Hackeng
- e Department of Biochemistry , CARIM, Maastricht University , The Netherlands
| | - Mark Post
- a Department of Physiology , CARIM, Maastricht University , The Netherlands
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Schadock-Hewitt AJ, Bruce TF, Marcus RK. Evidence for the Intercalation of Lipid Acyl Chains into Polypropylene Fiber Matrices. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10418-10425. [PMID: 26381380 DOI: 10.1021/acs.langmuir.5b01964] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Headgroup-functionalized lipids are being developed as ligand tethers for high selectivity separations on polypropylene capillary-channeled polymer fiber stationary phases. Surface modification is affected under ambient conditions from aqueous solution. This basic methodology has promise in many areas where robust modifications are desired on hydrophobic surfaces. In order to understand the mode of adsorption of the lipid tail to the polypropylene surface, lipids labeled with the environmentally sensitive 7-nitro-2-1,3-benzoxadiazol-4-yl (NBD) fluorophore were used, with NBD covalently attached to the headgroup (NBD-PE) or the acyl chain (acyl NBD-PE) of the lipid. When modified with the acyl NBD-PE, fluorescence imaging of the fiber at excitation wavelengths increasing from 470 to 510 nm caused a 32 nm shift in emission toward the red edge of the absorption band, indicating that the NBD molecule (and thus the lipid tail) is motionally restricted. Fluorescence imaging on fibers modified with NBD-PE or the free NBD-Cl dye molecule yields no change in the emission response. The results of these imaging studies provide evidence that the acyl chain portions of the lipids intercalate into free volume of the polypropylene fiber structure, yielding a robust means of surface modification and the potential for high ligand densities.
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Affiliation(s)
- Abby J Schadock-Hewitt
- Department of Chemistry, Biosystems Research Complex, and ‡Clemson Light Imaging Facility, Life Sciences Building, Clemson University , Clemson, South Carolina 29634, United States
| | - Terri F Bruce
- Department of Chemistry, Biosystems Research Complex, and ‡Clemson Light Imaging Facility, Life Sciences Building, Clemson University , Clemson, South Carolina 29634, United States
| | - R Kenneth Marcus
- Department of Chemistry, Biosystems Research Complex, and ‡Clemson Light Imaging Facility, Life Sciences Building, Clemson University , Clemson, South Carolina 29634, United States
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11
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Pagels RF, Prud'homme RK. Polymeric nanoparticles and microparticles for the delivery of peptides, biologics, and soluble therapeutics. J Control Release 2015; 219:519-535. [PMID: 26359125 DOI: 10.1016/j.jconrel.2015.09.001] [Citation(s) in RCA: 102] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2015] [Revised: 09/02/2015] [Accepted: 09/03/2015] [Indexed: 01/10/2023]
Abstract
Biologically derived therapeutics, or biologics, are the most rapidly growing segment of the pharmaceutical marketplace. However, there are still unmet needs in improving the delivery of biologics. Injectable polymeric nanoparticles and microparticles capable of releasing proteins and peptides over time periods as long as weeks or months have been a major focus in the effort to decrease the frequency of administration. These particle systems fit broadly into two categories: those composed of hydrophilic and those composed of hydrophobic polymeric scaffolds. Here we review the factors that contribute to the slow and controlled release from each class of particle, as well as the effects of synthesis parameters and product design on the loading, encapsulation efficiency, biologic integrity, and release profile. Generally, hydrophilic scaffolds are ideal for large proteins while hydrophobic scaffolds are more appropriate for smaller biologics without secondary structure. Here we also introduce a Flash NanoPrecipitation method that has been adopted for encapsulating biologics in nanoparticles (40-200nm) at high loadings (50-75wt.%) and high encapsulation efficiencies. The hydrophilic gel interior and hydrophobic shell provide an opportunity to combine the best of both classes of injectable polymeric depots.
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Affiliation(s)
- Robert F Pagels
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, United States
| | - Robert K Prud'homme
- Department of Chemical and Biological Engineering, Princeton University, Princeton, NJ 08544, United States.
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Byeon HJ, Kim I, Choi JS, Lee ES, Shin BS, Youn YS. PEGylated apoptotic protein-loaded PLGA microspheres for cancer therapy. Int J Nanomedicine 2015; 10:739-48. [PMID: 25632232 PMCID: PMC4304599 DOI: 10.2147/ijn.s75821] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
The aim of the current study was to investigate the antitumor potential of poly (D,L-lactic-co-glycolic acid) microspheres (PLGA MSs) containing polyethylene glycol (PEG)-conjugated (PEGylated) tumor necrosis factor–related apoptosis-inducing ligand (PEG-TRAIL). PEG-TRAIL PLGA MSs were prepared by using a water-in-oil-in-water double-emulsion method, and the apoptotic activities of supernatants released from the PLGA MSs at days 1, 3, and 7 were examined. The antitumor effect caused by PEG-TRAIL PLGA MSs was evaluated in pancreatic Mia Paca-2 cell-xenografted mice. PEG-TRAIL PLGA MS was found to be spherical and 14.4±1.06 μm in size, and its encapsulation efficiency was significantly greater than that of TRAIL MS (85.7%±4.1% vs 43.3%±10.9%, respectively). The PLGA MS gradually released PEG-TRAIL for 14 days, and the released PEG-TRAIL was shown to have clear apoptotic activity in Mia Paca-2 cells, whereas TRAIL released after 1 day had a negligible activity. Finally, PEG-TRAIL PLGA MS displayed remarkably greater antitumor efficacy than blank or TRAIL PLGA MS in Mia Paca-2 cell-xenografted mice in terms of tumor volume and weight, apparently due to increased stability and well-retained apoptotic activity of PEG-TRAIL in PLGA MS. We believe that this PLGA MS system, combined with PEG-TRAIL, should be considered a promising candidate for treating pancreatic cancer.
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Affiliation(s)
- Hyeong Jun Byeon
- Department of Pharmaceutical Sciences, School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Insoo Kim
- Department of Pharmaceutical Sciences, School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Ji Su Choi
- Department of Pharmaceutical Sciences, School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
| | - Eun Seong Lee
- Division of Biotechnology, The Catholic University of Korea, Bucheon-si, Republic of Korea
| | - Beom Soo Shin
- Department of Pharmacy, College of Pharmacy, Catholic University of Daegu, Gyeongsan-si, Republic of Korea
| | - Yu Seok Youn
- Department of Pharmaceutical Sciences, School of Pharmacy, Sungkyunkwan University, Suwon, Republic of Korea
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Bai Y, Zhao M, Zhang C, Li S, Qi Y, Wang B, Huang L, Li X. Anti-angiogenic effects of a mutant endostatin: a new prospect for treating retinal and choroidal neovascularization. PLoS One 2014; 9:e112448. [PMID: 25380141 PMCID: PMC4224489 DOI: 10.1371/journal.pone.0112448] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2014] [Accepted: 10/07/2014] [Indexed: 12/26/2022] Open
Abstract
Purpose Pathological fundus angiogenesis is a major cause of vision loss in retina diseases. Endostatin, a C-terminal fragment of collagen XVIII, is an endogenous anti-angiogenic protein. The present study aimed to investigate the in vitro and in vivo anti-angiogenic properties of two proteins: an N-terminal H1D/H3D mutant endostatin (M-ES) and a polyethylene glycol propionaldehyde (PEG) covalent M-ES (PEG-M-ES). Methods M-ES and PEG-M-ES properties were characterized in vitro using a zinc ion binding assay and a stability test. Activity assays, including migration, proliferation, and tube formation assays, were performed with human retinal microvascular endothelial cells (HRMECs) and human umbilical vein endothelial cells (HUVECs). Mouse oxygen-induced retinopathy (OIR) and choroidal neovascularization (CNV) models were used to evaluate in vivo anti-angiogenic effects. In addition, a rabbit model was used to study the retinal pharmacokinetic profile following an intravitreal injection. Results The results indicated that the H1D/H3D mutations of endostatin reduced the zinc binding capacity of M-ES and facilitated PEG covalent binding. PEG-M-ES was more stable and persisted longer in the retina compared with M-ES. The in vitro studies demonstrated that M-ES and PEG-M-ES inhibited HRMEC and HUVEC proliferation, migration, and tube formation more efficiently than ES. In vivo, a single intravitreal injection of M-ES and PEG-M-ES significantly decreased neovascularization in both the OIR and CNV animal models. Conclusion The present study demonstrated for the first time that PEG-M-ES exhibits a long-term inhibitory effect on neovascularization in vitro and in vivo. These data suggest that PEG-M-ES may represent an innovative therapeutic strategy to prevent fundus neovascularization.
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Affiliation(s)
- Yujing Bai
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Min Zhao
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Chunfang Zhang
- Clinical Epidemiology & Biostatistics, Peking University People's Hospital, Beijing, People's Republic of China
| | - Shanshan Li
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Yun Qi
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Bin Wang
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
| | - Lvzhen Huang
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
- * E-mail: (LH); (XL)
| | - Xiaoxin Li
- Key Laboratory of Vision Loss and Restoration, Ministry of Education, Beijing Key Laboratory for the Diagnosis and Treatment of Retinal and Choroid Diseases, Department of Ophthalmology, Peking University People's Hospital, Beijing, People's Republic of China
- * E-mail: (LH); (XL)
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Elahy M, Baindur-Hudson S, Cruzat VF, Newsholme P, Dass CR. Mechanisms of PEDF-mediated protection against reactive oxygen species damage in diabetic retinopathy and neuropathy. J Endocrinol 2014; 222:R129-39. [PMID: 24928938 DOI: 10.1530/joe-14-0065] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pigment epithelium-derived factor (PEDF) is a pluripotent glycoprotein belonging to the serpin family. PEDF can stimulate several physiological processes such as angiogenesis, cell proliferation, and survival. Oxidative stress plays an important role in the occurrence of diabetic retinopathy (DR), which is the major cause of blindness in young diabetic adults. PEDF plays a protective role in DR and there is accumulating evidence of the neuroprotective effect of PEDF. In this paper, we review the role of PEDF and the mechanisms involved in its antioxidative, anti-inflammatory, and neuroprotective properties.
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Affiliation(s)
- Mina Elahy
- College of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, Australia
| | - Swati Baindur-Hudson
- College of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, Australia
| | - Vinicius F Cruzat
- College of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, AustraliaCollege of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, Australia
| | - Philip Newsholme
- College of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, AustraliaCollege of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, Australia
| | - Crispin R Dass
- College of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, AustraliaCollege of Health and BiomedicineVictoria University, St Albans, Victoria 3021, AustraliaSchool of Biomedical SciencesBiosciences Research PrecinctSchool of PharmacyCurtin University, Bentley, Perth, Western Australia 6102, Australia
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15
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Reineke JJ, Cho DY, Dingle YT, Morello AP, Jacob J, Thanos CG, Mathiowitz E. Unique insights into the intestinal absorption, transit, and subsequent biodistribution of polymer-derived microspheres. Proc Natl Acad Sci U S A 2013; 110:13803-8. [PMID: 23922388 PMCID: PMC3752225 DOI: 10.1073/pnas.1305882110] [Citation(s) in RCA: 57] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Polymeric microspheres (MSs) have received attention for their potential to improve the delivery of drugs with poor oral bioavailability. Although MSs can be absorbed into the absorptive epithelium of the small intestine, little is known about the physiologic mechanisms that are responsible for their cellular trafficking. In these experiments, nonbiodegradable polystyrene MSs (diameter range: 500 nm to 5 µm) were delivered locally to the jejunum or ileum or by oral administration to young male rats. Following administration, MSs were taken up rapidly (≤ 5 min) by the small intestine and were detected by transmission electron microscopy and confocal laser scanning microscopy. Gel permeation chromatography confirmed that polymer was present in all tissue samples, including the brain. These results confirm that MSs (diameter range: 500 nm to 5 µm) were absorbed by the small intestine and distributed throughout the rat. After delivering MSs to the jejunum or ileum, high concentrations of polystyrene were detected in the liver, kidneys, and lungs. The pharmacologic inhibitors chlorpromazine, phorbol 12-myristate 13-acetate, and cytochalasin D caused a reduction in the total number of MSs absorbed in the jejunum and ileum, demonstrating that nonphagocytic processes (including endocytosis) direct the uptake of MSs in the small intestine. These results challenge the convention that phagocytic cells such as the microfold cells solely facilitate MS absorption in the small intestine.
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Affiliation(s)
- Joshua J. Reineke
- Department of Pharmaceutical Sciences, Eugene Applebaum College of Pharmacy and Health Sciences, Wayne State University, Detroit, MI 48202; and
| | - Daniel Y. Cho
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912
| | - Yu-Ting Dingle
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912
| | - A. Peter Morello
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912
| | - Jules Jacob
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912
| | - Christopher G. Thanos
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912
| | - Edith Mathiowitz
- Department of Molecular Pharmacology, Physiology and Biotechnology, Brown University, Providence, RI 02912
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16
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Amiram M, Luginbuhl KM, Li X, Feinglos MN, Chilkoti A. A depot-forming glucagon-like peptide-1 fusion protein reduces blood glucose for five days with a single injection. J Control Release 2013; 172:144-151. [PMID: 23928357 DOI: 10.1016/j.jconrel.2013.07.021] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/19/2013] [Accepted: 07/25/2013] [Indexed: 01/04/2023]
Abstract
Peptide drugs are an exciting class of pharmaceuticals for the treatment of a variety of diseases; however, their short half-life dictates multiple and frequent injections causing undesirable side effects. Herein, we describe a novel peptide delivery system that seeks to combine the attractive features of prolonged circulation time with a prolonged release formulation. This system consists of glucagon-like peptide-1, a type-2 diabetes drug fused to a thermally responsive, elastin-like-polypeptide (ELP) that undergoes a soluble-insoluble phase transition between room temperature and body temperature, thereby forming an injectable depot. We synthesized a set of GLP-1-ELP fusions and verified their proteolytic stability and potency in vitro. Significantly, a single injection of depot forming GLP-1-ELP fusions reduced blood glucose levels in mice for up to 5 days, 120 times longer than an injection of the native peptide. These findings demonstrate the unique advantages of using ELPs to release peptide-ELP fusions from a depot combined with enhanced systemic circulation to create a tunable peptide delivery system.
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Affiliation(s)
- M Amiram
- Department of Biomedical Engineering, Duke University, Durham 27708, USA
| | - K M Luginbuhl
- Department of Biomedical Engineering, Duke University, Durham 27708, USA
| | - X Li
- Department of Biomedical Engineering, Duke University, Durham 27708, USA
| | - M N Feinglos
- Division of Endocrinology, Metabolism, and Nutrition, Duke University Medical Center, Durham 27710, USA
| | - A Chilkoti
- Department of Biomedical Engineering, Duke University, Durham 27708, USA.
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17
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Mittal A, Raber AS, Schaefer UF, Weissmann S, Ebensen T, Schulze K, Guzmán CA, Lehr CM, Hansen S. Non-invasive delivery of nanoparticles to hair follicles: A perspective for transcutaneous immunization. Vaccine 2013; 31:3442-51. [DOI: 10.1016/j.vaccine.2012.12.048] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2012] [Revised: 11/23/2012] [Accepted: 12/18/2012] [Indexed: 10/27/2022]
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18
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Taghdisi SM, Danesh NM, Sarreshtehdar Emrani A, Tabrizian K, Zandkarimi M, Ramezani M, Abnous K. Targeted delivery of Epirubicin to cancer cells by PEGylated A10 aptamer. J Drug Target 2013; 21:739-44. [PMID: 23815443 DOI: 10.3109/1061186x.2013.812095] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Clinical administrations of anthracyclines are limited by cardiotoxicity and myelosuppression. Targeted delivery of anticancer agents is especially important in reducing their side effects. In this work, A10 (Apt), an aptamer for prostate-specific membrane anytigen (PSMA), was applied for targeted delivery of Epirubicin (Epi) to LNCaP cells (PSMA(+)). Flow cytometry analysis showed that PEG-Apt-Epi complex was internalized effectively to LNCaP cells (PSMA(+)), but not to PC3 cells (PSMA(-)). This fact was confirmed by less cytotoxicity of PEG-Apt-Epi complex in PC3 cells in comparison with Epi alone. No significant change in viability between Epi- and complex-treated LNCaP cells was observed. In conclusion, PEG-Apt-Epi complex is an efficient and simple system for specific delivery of drug to PSMA-expressing cell lines.
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Affiliation(s)
- Seyed Mohammad Taghdisi
- Department of Pharmaceutical Biotechnology, Zabol University of Medical Sciences, Zabol, Iran
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19
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Injectable protease-operated depots of glucagon-like peptide-1 provide extended and tunable glucose control. Proc Natl Acad Sci U S A 2013; 110:2792-7. [PMID: 23359691 DOI: 10.1073/pnas.1214518110] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
Peptide drugs are an exciting class of pharmaceuticals increasingly used for the treatment of a variety of diseases; however, their main drawback is a short half-life, which dictates multiple and frequent injections and an undesirable "peak-and-valley" pharmacokinetic profile, which can cause undesirable side-effects. Synthetic prolonged release formulations can provide extended release of biologically active native peptide, but their synthetic nature can be an obstacle to production and utilization. Motivated by these limitations, we have developed a new and entirely genetically encoded peptide delivery system--Protease Operated Depots (PODs)--to provide sustained and tunable release of a peptide drug from an injectable s.c. depot. We demonstrate proof-of-concept of PODs, by fusion of protease cleavable oligomers of glucagon-like peptide-1, a type-2 diabetes drug, and a thermally responsive, depot-forming elastin-like-polypeptide that undergoes a thermally triggered inverse phase transition below body temperature, thereby forming an injectable depot. We constructed synthetic genes for glucagon-like peptide-1 PODs and demonstrated their high-yield expression in Escherichia coli and facile purification by a nonchromatographic scheme we had previously developed. Remarkably, a single injection of glucagon-like peptide-1 PODs was able to reduce blood glucose levels in mice for up to 5 d, 120 times longer than an injection of the native peptide drug. These findings demonstrate that PODs provide the first genetically encoded alternative to synthetic peptide encapsulation schemes for sustained delivery of peptide therapeutics.
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20
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Choi AWT, Louie MW, Li SPY, Liu HW, Chan BTN, Lam TCY, Lin ACC, Cheng SH, Lo KKW. Emissive Behavior, Cytotoxic Activity, Cellular Uptake, and PEGylation Properties of New Luminescent Rhenium(I) Polypyridine Poly(ethylene glycol) Complexes. Inorg Chem 2012. [DOI: 10.1021/ic301948d] [Citation(s) in RCA: 72] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Affiliation(s)
- Alex Wing-Tat Choi
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Man-Wai Louie
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Steve Po-Yam Li
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Hua-Wei Liu
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Bruce Ting-Ngok Chan
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Tonlex Chun-Ying Lam
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Alex Chun-Chi Lin
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Shuk-Han Cheng
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
| | - Kenneth Kam-Wing Lo
- Department of Biology and Chemistry, City University of Hong Kong, Tat Chee Avenue, Kowloon, Hong Kong, P.R.
China
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21
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Vugmeyster Y, Entrican CA, Joyce AP, Lawrence-Henderson RF, Leary BA, Mahoney CS, Patel HK, Raso SW, Olland SH, Hegen M, Xu X. Pharmacokinetic, biodistribution, and biophysical profiles of TNF nanobodies conjugated to linear or branched poly(ethylene glycol). Bioconjug Chem 2012; 23:1452-62. [PMID: 22731748 DOI: 10.1021/bc300066a] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Covalent attachment of poly(ethylene glycol) (PEG) to therapeutic proteins has been used to prolong in vivo exposure of therapeutic proteins. We have examined pharmacokinetic, biodistribution, and biophysical profiles of three different tumor necrosis factor alpha (TNF) Nanobody-40 kDa PEG conjugates: linear 1 × 40 KDa, branched 2 × 20 kDa, and 4 × 10 kDa conjugates. In accord with earlier reports, the superior PK profile was observed for the branched versus linear PEG conjugates, while all three conjugates had similar potency in a cell-based assay. Our results also indicate that (i) a superior PK profile of branched versus linear PEGs is likely to hold across species, (ii) for a given PEG size, the extent of PEG branching affects the PK profile, and (iii) tissue penetration may differ between linear and branched PEG conjugates in a tissue-specific manner. Biophysical analysis (R(g)/R(h) ratio) demonstrated that among the three protein-PEG conjugates the linear PEG conjugate had the most extended time-average conformation and the most exposed surface charges. We hypothesized that these biophysical characteristics of the linear PEG conjugate accounts for relatively less optimal masking of sites involved in elimination of the PEGylated Nanobodies (e.g., intracellular uptake and proteolysis), leading to lower in vivo exposure compared to the branched PEG conjugates. However, additional studies are needed to test this hypothesis.
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Affiliation(s)
- Yulia Vugmeyster
- Department of Pharmacokinetics, Dynamics, and Metabolism, Pfizer Inc., Andover, MA, USA.
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22
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Bai YJ, Huang LZ, Xu XL, Du W, Zhou AY, Yu WZ, Li XX. Polyethylene Glycol-Modified Pigment Epithelial-Derived Factor: New Prospects for Treatment of Retinal Neovascularization. J Pharmacol Exp Ther 2012; 342:131-9. [DOI: 10.1124/jpet.112.192575] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
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23
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Han L, Fu Y, Cole AJ, Liu J, Wang J. Co-encapsulation and sustained-release of four components in ginkgo terpenes from injectable PELGE nanoparticles. Fitoterapia 2012; 83:721-31. [PMID: 22414318 DOI: 10.1016/j.fitote.2012.02.014] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2011] [Revised: 02/23/2012] [Accepted: 02/25/2012] [Indexed: 11/30/2022]
Abstract
It is difficult to develop injectable sustained delivery systems for herbal medicines because of their composition complexity. Encapsulating various compounds with different physiochemical properties and achieving their synchronized and sustained release seem too hard to realize. In this paper, an injectable nanoparticulate system based on an mPEG-PLGA-mPEG (PELGE) platform was prepared for co-encapsulation and sustained release of four active components (ginkgolides A, B, C and bilobalide) in Ginkgo biloba extract. Different carriers were screened by macrophage uptake experiment for their ability to be long-circulation. Drug loaded nanoparticles were prepared with 10% PEG(2000) modified PLGA by a co-precipitation method. The encapsulation efficiency of the total ginkgo terpenes (GT) in the optimal formulation was 78.84±2.06% with a loading dose of 11.90±0.31mg/150mg PELGE. The particles exhibited a spherical shape with a mean diameter of 123.3±44.0nm and zeta potential of -30.86±2.49mV. Sustained and synchronized release of the four components from PELGE nanoparticles was observed both in vitro and in vivo, which was mainly contributed to the long circulation of PEGylated nanoparticles and the slow degradation of PLGA. The half-life time of the four terpenoid compounds were also significantly improved by incorporation into PELGE nanoparticles. The results indicate that a PELGE nanoparticle is a promising carrier system for sustained and synchronized release of herbal medicines containing multiple components.
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Affiliation(s)
- Limei Han
- Department of Pharmaceutics, School of Pharmacy, Fudan University, Shanghai 201203, PR China
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24
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Flores-Fernández GM, Griebenow K. Glycosylation improves α-chymotrypsin stability upon encapsulation in poly(lactic-co-glycolic)acid microspheres. RESULTS IN PHARMA SCIENCES 2012; 2:46-51. [PMID: 23419866 PMCID: PMC3572538 DOI: 10.1016/j.rinphs.2012.08.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Enhancing protein stability upon encapsulation and release from polymers is a key issue in sustained release applications. In addition, optimum drug dispersion in the polymer particles is critical for achieving release profiles with low unwanted initial “burst” release. Herein, we address both issues by formulating the model enzyme α-chymotrypsin (α-CT) as nanoparticles to improve drug dispersion and by covalently modifying it with glycans to afford improved stability during encapsulation in poly(lactic-co-glycolic) acid (PLGA) microspheres. α-CT was chemically modified with activated lactose (500 Da) to achieve molar ratios of 4.5 and 7.1 lactose-to-protein. The bioconjugates were co-lyophilized with methyl-β-cyclodextrin followed by suspension in ethyl acetate to afford nanoparticles. Nanoparticle formation did not significantly impact protein stability; less than 5% of the protein was aggregated and the residual activity remained above 90% for all formulations. Using a solid-in-oil-in-water (s/o/w) methodology developed in our laboratory for nanoparticles, we obtained a maximum encapsulation efficiency of 61%. Glycosylation completely prevented otherwise substantial protein aggregation and activity loss during encapsulation of the non-modified enzyme. Moreover, in vitro protein release was improved for glycosylated formulations. These results highlight the potential of chemical glycosylation to improve the stability of pharmaceutical proteins in sustained release applications.
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Affiliation(s)
- Giselle M Flores-Fernández
- Department of Chemistry, University of Puerto Rico, Río Piedras Campus, P.O. Box 23346, San Juan, Puerto Rico 00931-3346
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25
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Pai SS, Hammouda B, Hong K, Pozzo DC, Przybycien TM, Tilton RD. The Conformation of the Poly(ethylene glycol) Chain in Mono-PEGylated Lysozyme and Mono-PEGylated Human Growth Hormone. Bioconjug Chem 2011; 22:2317-23. [DOI: 10.1021/bc2003583] [Citation(s) in RCA: 75] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
| | - Boualem Hammouda
- NIST Center for Neutron Research, National Institute of Standards and Technology, Gaithersburg,
Maryland 20899, United States
| | - Kunlun Hong
- Center for Nanophase Materials
Sciences and Chemical Science Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, United States
| | - Danilo C. Pozzo
- Department of Chemical Engineering, University of Washington, Seattle, Washington 98195,
United States
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26
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Zhang XR, Zheng Y, Jin T, Chow AHL. Formulation of sustained-release microspheres of granulocyte macrophage colony stimulating factor by freezing-induced phase separation with dextran and encapsulation with blended polymers. J Microencapsul 2011; 28:743-51. [PMID: 21967463 DOI: 10.3109/02652048.2011.615950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study aimed to assess the potential merits of formulating sustained-release microspheres of recombinant human granulocyte macrophage colony stimulating factor (rhGM-CSF) via freezing-induced phase separation (FIPS) of the protein with dextran followed by encapsulation with binary mixture of poly(lactic-co-glycolic acid) (PLGA) 2A (MW∼12K) and 3A (MW∼47K) or of PLGA2A and polylactic acid (PLA; MW∼83K). The formulated dextran particles and microspheres were characterized in vitro for loading, aggregation, bioactivity and release behavior of the protein where appropriate. rhGM-CSF retained about 60% of bioactivity with no significant aggregation after each formulation step. Encapsulation of protein-loaded dextran particles attained only 80% with the PLGA2A and PLGA3A blend, but 100% with the PLGA2A and PLA mixture. The former formulation exhibited a triphasic in-vitro release profile typical of PLGA microspheres while the latter revealed a much lower initial burst followed by a steady and complete release of rhGM-CSF with preserved bioactivity over a 15-day period.
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Affiliation(s)
- Xin-ran Zhang
- School of Pharmacy, The Chinese University of Hong Kong, Hong Kong, China
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Makadia HK, Siegel SJ. Poly Lactic-co-Glycolic Acid (PLGA) as Biodegradable Controlled Drug Delivery Carrier. Polymers (Basel) 2011; 3:1377-1397. [PMID: 22577513 DOI: 10.3390/polym3031377] [Citation(s) in RCA: 2580] [Impact Index Per Article: 198.5] [Reference Citation Analysis] [Abstract] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
In past two decades poly lactic-co-glycolic acid (PLGA) has been among the most attractive polymeric candidates used to fabricate devices for drug delivery and tissue engineering applications. PLGA is biocompatible and biodegradable, exhibits a wide range of erosion times, has tunable mechanical properties and most importantly, is a FDA approved polymer. In particular, PLGA has been extensively studied for the development of devices for controlled delivery of small molecule drugs, proteins and other macromolecules in commercial use and in research. This manuscript describes the various fabrication techniques for these devices and the factors affecting their degradation and drug release.
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Affiliation(s)
- Hirenkumar K Makadia
- Materials Science and Engineering, University of Pennsylvania, Philadelphia, PA 19104, USA
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Pinholt C, Hartvig RA, Medlicott NJ, Jorgensen L. The importance of interfaces in protein drug delivery – why is protein adsorption of interest in pharmaceutical formulations? Expert Opin Drug Deliv 2011; 8:949-64. [DOI: 10.1517/17425247.2011.577062] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Rodríguez-Martínez JA, Rivera-Rivera I, Griebenow K. Prevention of benzyl alcohol-induced aggregation of chymotrypsinogen by PEGylation. ACTA ACUST UNITED AC 2011; 63:800-5. [PMID: 21585378 DOI: 10.1111/j.2042-7158.2011.01288.x] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Abstract
OBJECTIVES Addition of the antimicrobial preservative benzyl alcohol to reconstitution buffer promotes the formation of undesirable aggregates in multidose protein formulations. Herein we investigated the efficiency of PEGylation (attachment of poly(ethylene glycol)) to prevent benzyl alcohol-induced aggregation of the model protein α-chymotrypsinogen A (aCTgn). METHODS Various PEG-aCTgn conjugates were prepared using PEG with a molecular weight of either 700 or 5000 Da by varying the PEG-to-protein ratio during synthesis and the formation of insoluble aggregates was studied. The effect of benzyl alcohol on the thermodynamic stability and tertiary structure of aCTgn was also examined. KEY FINDINGS When the model protein was reconstituted in buffer containing 0.9% benzyl alcohol, copious amounts of buffer-insoluble aggregates formed within 24 h (>10%). Benzyl alcohol-induced aggregation was completely prevented when two or five molecules of PEG with a molecular weight of 5000 Da were attached to the protein, whereas two or four molecules of bound 700 Da PEG were completely inefficient in preventing aggregation. Mechanistic investigations excluded prevention of structural perturbations or increased thermodynamic stability by PEGylation from being responsible for the prevention of aggregation. Simple addition of PEG to the buffer was also inefficient and PEG had to be covalently linked to the protein to be efficient. CONCLUSIONS The most likely explanation for the protective effect of the 5000 Da PEG is shielding of exposed hydrophobic protein surface area and prevention of protein-protein contacts (molecular spacer effect).
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Pai SS, Przybycien TM, Tilton RD. Protein PEGylation attenuates adsorption and aggregation on a negatively charged and moderately hydrophobic polymer surface. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2010; 26:18231-18238. [PMID: 21067142 DOI: 10.1021/la102709y] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
Covalent grafting of poly(ethylene glycol) chains to proteins ("PEGylation") is emerging as an effective technique to increase the in vivo circulation time and efficacy of protein drugs. PEGylated protein adsorption at a variety of solid/aqueous interfaces is a critical aspect of their manufacture, storage, and delivery. A special category of block copolymer, PEGylated proteins have one or more water-soluble linear polymer (PEG) blocks and a single globular protein block that each exert distinct intermolecular and surface interaction forces. We report the impact of PEGylation on protein adsorption at the interface between aqueous solutions and solid films of poly(lactide-co-glycolide) (PLG), a moderately hydrophobic and negatively charged polymer. Using the model protein lysozyme with controlled degrees of PEGylation, we employ total internal reflection fluorescence techniques to measure adsorption isotherms, adsorption reversibility, and the extent of surface-induced aggregation. Lysozyme PEGylation reduces the extent of protein adsorption and surface-induced aggregation and increases the reversibility of adsorption compared to the unconjugated protein. Results are interpreted in terms of steric forces among grafted PEG chains and their effects on protein-protein interactions and protein orientation on the surface.
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Affiliation(s)
- Sheetal S Pai
- Center for Complex Fluids Engineering, Department of Chemical Engineering, Carnegie Mellon University, Pittsburgh, Pennsylvania 15213, United States
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31
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Chou HY, Lin XZ, Pan WY, Wu PY, Chang CM, Lin TY, Shen HH, Tao MH. Hydrogel-Delivered GM-CSF Overcomes Nonresponsiveness to Hepatitis B Vaccine through the Recruitment and Activation of Dendritic Cells. THE JOURNAL OF IMMUNOLOGY 2010; 185:5468-75. [DOI: 10.4049/jimmunol.1001875] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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Mansour HM, Sohn M, Al-Ghananeem A, Deluca PP. Materials for pharmaceutical dosage forms: molecular pharmaceutics and controlled release drug delivery aspects. Int J Mol Sci 2010; 11:3298-322. [PMID: 20957095 PMCID: PMC2956096 DOI: 10.3390/ijms11093298] [Citation(s) in RCA: 119] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2010] [Revised: 08/30/2010] [Accepted: 09/03/2010] [Indexed: 12/16/2022] Open
Abstract
Controlled release delivery is available for many routes of administration and offers many advantages (as microparticles and nanoparticles) over immediate release delivery. These advantages include reduced dosing frequency, better therapeutic control, fewer side effects, and, consequently, these dosage forms are well accepted by patients. Advances in polymer material science, particle engineering design, manufacture, and nanotechnology have led the way to the introduction of several marketed controlled release products and several more are in pre-clinical and clinical development.
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Affiliation(s)
- Heidi M Mansour
- Division of Pharmaceutical Sciences, College of Pharmacy, University of Kentucky, Lexington, KY 40536, USA; E-Mails: (M.S.); (A.A.-G.); (P.P.D)
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Immunogenicity, toxicology, pharmacokinetics and pharmacodynamics of growth hormone ligand-receptor fusions. Clin Sci (Lond) 2010; 119:483-91. [PMID: 20597861 DOI: 10.1042/cs20100241] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
A fundamental concern for all new biological therapeutics is the possibility of inducing an immune response. We have recently demonstrated that an LR-fusion (ligand-receptor fusion) of growth hormone generates a potent long-acting agonist; however, the immunogenicity and toxicity of these molecules have not been tested. To address these issues, we have designed molecules with low potential as immunogens and undertaken immunogenicity and toxicology studies in Macaca fascicularis and pharmacokinetic and pharmacodynamic studies in rats. Two variants of the LR-fusion, one with a flexible linker (GH-LRv2) and the other without (GH-LRv3), were tested. Comparison was made with native human GH (growth hormone). GH-LRv2 and GH-LRv3 demonstrated similar pharmacokinetics in rats, showing reduced clearance compared with native GH and potent agonist activity with respect to body weight gain in a hypophysectomized rat model. In M. fascicularis, a low level of antibodies to GH-LRv2 was found in one sample, but there was no other evidence of any immunogenic response to the other fusion protein. There were no toxic effects and specifically no changes in histology at injection sites after two repeated administrations. The pharmacokinetic profiles in monkeys confirmed long half-lives for both GH-LRv2 and GH-LRv3 representing exceptionally delayed clearance over rhGH (recombinant human GH). The results suggest that repeated administration of a GH LR-fusion is safe, non-toxic, and the pharmacokinetic profile suggests that two to three weekly administrations is a potential therapeutic regimen for humans.
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Chorny M, Hood E, Levy RJ, Muzykantov VR. Endothelial delivery of antioxidant enzymes loaded into non-polymeric magnetic nanoparticles. J Control Release 2010; 146:144-51. [PMID: 20483366 DOI: 10.1016/j.jconrel.2010.05.003] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2010] [Revised: 04/23/2010] [Accepted: 05/02/2010] [Indexed: 10/19/2022]
Abstract
Antioxidant enzymes have shown promise as a therapy for pathological conditions involving increased production of reactive oxygen species (ROS). However the efficiency of their use for combating oxidative stress is dependent on the ability to achieve therapeutically adequate levels of active enzymes at the site of ROS-mediated injury. Thus, the implementation of antioxidant enzyme therapy requires a strategy enabling both guided delivery to the target site and effective protection of the protein in its active form. To address these requirements we developed magnetically responsive nanoparticles (MNP) formed by precipitation of calcium oleate in the presence of magnetite-based ferrofluid (controlled aggregation/precipitation) as a carrier for magnetically guided delivery of therapeutic proteins. We hypothesized that antioxidant enzymes, catalase and superoxide dismutase (SOD), can be protected from proteolytic inactivation by encapsulation in MNP. We also hypothesized that catalase-loaded MNP applied with a high-gradient magnetic field can rescue endothelial cells from hydrogen peroxide toxicity in culture. To test these hypotheses, a family of enzyme-loaded MNP formulations were prepared and characterized with respect to their magnetic properties, enzyme entrapment yields and protection capacity. SOD- and catalase-loaded MNP were formed with average sizes ranging from 300 to 400 nm, and a protein loading efficiency of 20-33%. MNP were strongly magnetically responsive (magnetic moment at saturation of 14.3 emu/g) in the absence of magnetic remanence, and exhibited a protracted release of their cargo protein in plasma. Catalase stably associated with MNP was protected from proteolysis and retained 20% of its initial enzymatic activity after 24h of exposure to pronase. Under magnetic guidance catalase-loaded MNP were rapidly taken up by cultured endothelial cells providing increased resistance to oxidative stress (62+/-12% cells rescued from hydrogen peroxide induced cell death vs. 10+/-4% under non-magnetic conditions). We conclude that non-polymeric MNP formed using the controlled aggregation/precipitation strategy are a promising carrier for targeted antioxidant enzyme therapy, and in combination with magnetic guidance can be applied to protect endothelial cells from oxidative stress mediated damage. This protective effect of magnetically targeted MNP impregnated with antioxidant enzymes can be highly relevant for the treatment of cardiovascular disease and should be further investigated in animal models.
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Affiliation(s)
- Michael Chorny
- Department of Pediatrics, The Children's Hospital of Philadelphia, Abramson Research Bldg., Ste. 702, 3615 Civic Center Blvd., Philadelphia, PA 19104, USA.
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