1
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Niloy KK, Lowe TL. Injectable systems for long-lasting insulin therapy. Adv Drug Deliv Rev 2023; 203:115121. [PMID: 37898336 DOI: 10.1016/j.addr.2023.115121] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2023] [Revised: 10/20/2023] [Accepted: 10/25/2023] [Indexed: 10/30/2023]
Abstract
Insulin therapy is the mainstay to treat diabetes characterizedd by hyperglycemia. However, its short half-life of only 4-6 min limits its effectiveness in treating chronic diabetes. Advances in recombinant DNA technology and protein engineering have led to several insulin analogue products that have up to 42 h of glycemic control. However, these insulin analogues still require once- or twice-daily injections for optimal glycemic control and have poor patient compliance and adherence issues. To achieve insulin release for more than one day, different injectable delivery systems including microspheres, in situ forming depots, nanoparticles and composite systems have been developed. Several of these delivery systems have advanced to clinical trials for once-weekly insulin injection. This review comprehensively summarizes the developments of injectable insulin analogs and delivery systems covering the whole field of injectable long-lasting insulin technologies from prototype design, preclinical studies, clinical trials to marketed products for the treatment of diabetes.
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Affiliation(s)
- Kumar Kulldeep Niloy
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Department of Pharmaceutical Sciences, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Tao L Lowe
- Department of Pharmaceutical Sciences, University of Tennessee Health Science Center, Memphis, TN 38163, USA; Department of Oral and Maxillofacial Surgery, School of Dentistry, University of Maryland, Baltimore, MD 21201, USA; Fischell Department of Bioengineering, A. James Clark School of Engineering, University of Maryland, College Park, MD 20742, USA.
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2
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Lui LH, Egbu R, Graver T, Williams GR, Brocchini S, Velayudhan A. Computational and Experimental Evaluation of the Stability of a GLP-1-like Peptide in Ethanol–Water Mixtures. Pharmaceutics 2022; 14:pharmaceutics14071462. [PMID: 35890357 PMCID: PMC9321252 DOI: 10.3390/pharmaceutics14071462] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2022] [Revised: 07/05/2022] [Accepted: 07/12/2022] [Indexed: 12/04/2022] Open
Abstract
Aggregation resulting from the self-association of peptide molecules remains a major challenge during preformulation. Whereas certain organic solvents are known to promote aggregation, ethanol (EtOH) is capable of disrupting interactions between peptide molecules. It is unclear whether it is beneficial or counterproductive to include EtOH in formulations of short peptides. Here, we employed molecular dynamics simulations using the DAFT protocol and MARTINI force field to predict the formation of self-associated dimers and to estimate the stability of a GLP-1-like peptide (G48) in 0–80% aqueous EtOH solutions. Both simulation and experimental data reveal that EtOH leads to a remarkable increase in the conformational stability of the peptide when stored over 15 days at 27 °C. In the absence of EtOH, dimerisation and subsequent loss in conformational stability (α-helix → random coil) were observed. EtOH improved conformational stability by reducing peptide–peptide interactions. The data suggest that a more nuanced approach may be applied in formulation decision making and, if the native state of the peptide is an α-helix organic solvent, such as EtOH, may enhance stability and improve prospects of long-term storage.
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Affiliation(s)
- Lok Hin Lui
- UCL School of Pharmacy, University College London, London WC1N 1AX, UK; (L.H.L.); (R.E.); (T.G.); (G.R.W.); (S.B.)
| | - Raphael Egbu
- UCL School of Pharmacy, University College London, London WC1N 1AX, UK; (L.H.L.); (R.E.); (T.G.); (G.R.W.); (S.B.)
| | - Thomas Graver
- UCL School of Pharmacy, University College London, London WC1N 1AX, UK; (L.H.L.); (R.E.); (T.G.); (G.R.W.); (S.B.)
| | - Gareth R. Williams
- UCL School of Pharmacy, University College London, London WC1N 1AX, UK; (L.H.L.); (R.E.); (T.G.); (G.R.W.); (S.B.)
| | - Steve Brocchini
- UCL School of Pharmacy, University College London, London WC1N 1AX, UK; (L.H.L.); (R.E.); (T.G.); (G.R.W.); (S.B.)
| | - Ajoy Velayudhan
- Department of Biochemical Engineering, University College London, London WC1E 6BT, UK
- Correspondence:
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3
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Singh U, Saifi Z, Kumar M, Reimers A, Krishnananda SD, Adelung R, Baum M. Role of structural specificity of ZnO particles in preserving functionality of proteins in their corona. Sci Rep 2021; 11:15945. [PMID: 34354203 PMCID: PMC8342705 DOI: 10.1038/s41598-021-95540-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2021] [Accepted: 07/12/2021] [Indexed: 11/09/2022] Open
Abstract
Reconfiguration of protein conformation in a micro and nano particle (MNP) protein corona due to interaction is an often-overlooked aspect in drug design and nano-medicine. Mostly, MNP-Protein corona studies focus on the toxicity of nano particles (NPs) in a biological environment to analyze biocompatibility. However, preserving functional specificity of proteins in an NP corona becomes critical for effective translation of nano-medicine. This paper investigates the non-classical interaction between insulin and ZnO MNPs using a classical electrical characterization technique at GHz frequency with an objective to understand the effect of the micro particle (MP) and nanoparticle (NP) morphology on the electrical characteristics of the MNP-Protein corona and therefore the conformation and functional specificity of protein. The MNP-Protein corona was subjected to thermal and enzymatic (papain) perturbation to study the denaturation of the protein. Experimental results demonstrate that the morphology of ZnO particles plays an important role in preserving the electrical characteristics of insulin.
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Affiliation(s)
- Urvashi Singh
- Microwave Physics Lab, Department of Physics and Computer Science, Dayalbagh Educational Institute (Deemed to be University), Dayalbagh, Agra, India
| | - Zeeshan Saifi
- Microwave Physics Lab, Department of Physics and Computer Science, Dayalbagh Educational Institute (Deemed to be University), Dayalbagh, Agra, India
| | - Mridul Kumar
- Microwave Physics Lab, Department of Physics and Computer Science, Dayalbagh Educational Institute (Deemed to be University), Dayalbagh, Agra, India
| | - Armin Reimers
- Functional Nanomaterial Group, Institute for Material Science, Kiel University, Kiel, Germany
| | - Soami Daya Krishnananda
- Microwave Physics Lab, Department of Physics and Computer Science, Dayalbagh Educational Institute (Deemed to be University), Dayalbagh, Agra, India.
| | - Rainer Adelung
- Functional Nanomaterial Group, Institute for Material Science, Kiel University, Kiel, Germany
| | - Martina Baum
- Functional Nanomaterial Group, Institute for Material Science, Kiel University, Kiel, Germany
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4
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Pelegri-O'Day EM, Bhattacharya A, Theopold N, Ko JH, Maynard HD. Synthesis of Zwitterionic and Trehalose Polymers with Variable Degradation Rates and Stabilization of Insulin. Biomacromolecules 2020; 21:2147-2154. [PMID: 32369347 PMCID: PMC8259896 DOI: 10.1021/acs.biomac.0c00133] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Polymers that stabilize biomolecules are important as excipients in protein formulation. Herein, we describe a class of degradable polymers that have tunable degradation rates depending on the polymer backbone and can stabilize proteins to aggregation. Specifically, zwitterion- and trehalose-substituted polycaprolactone, polyvalerolactone, polycarbonate, and polylactide were prepared and characterized with regards to their hydrolytic degradation and ability to stabilize insulin to mechanical agitation during heat. Ring-opening polymerization (ROP) of allyl-substituted monomers was performed by using organocatalysis, resulting in well-defined alkene-substituted polymers with good control over molecular weight and dispersity. The polymers were then modified by using photocatalyzed thiol-ene reactions to install protein-stabilizing carboxybetaine and trehalose side chains. The resulting polymers were water-soluble and exhibited a wide range of half-lives, from 12 h to more than 3 months. The polymers maintained the ability to stabilize the therapeutic protein insulin from activity loss due to aggregation, demonstrating their potential as degradable excipients for protein formulation.
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Affiliation(s)
- Emma M Pelegri-O'Day
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Arvind Bhattacharya
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Nik Theopold
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Jeong Hoon Ko
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
| | - Heather D Maynard
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, United States
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5
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Chen X, Yang D. Functional zwitterionic biomaterials for administration of insulin. Biomater Sci 2020; 8:4906-4919. [DOI: 10.1039/d0bm00986e] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
This review summarizes the structures and biomedical applications of zwitterionic biomaterials in the administration of insulin.
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Affiliation(s)
- Xingyu Chen
- College of Medicine
- Southwest Jiaotong University
- Chengdu 610031
- China
| | - Dongqiong Yang
- College of Medicine
- Southwest Jiaotong University
- Chengdu 610031
- China
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6
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Kisley L, Miller KA, Davis CM, Guin D, Murphy EA, Gruebele M, Leckband DE. Soluble Zwitterionic Poly(sulfobetaine) Destabilizes Proteins. Biomacromolecules 2018; 19:3894-3901. [PMID: 30064224 DOI: 10.1021/acs.biomac.8b01120] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The widespread interest in neutral, water-soluble polymers such as poly(ethylene glycol) (PEG) and poly(zwitterions) such as poly(sulfobetaine) (pSB) for biomedical applications is due to their widely assumed low protein binding. Here we demonstrate that pSB chains in solution can interact with proteins directly. Moreover, pSB can reduce the thermal stability and increase the protein folding cooperativity relative to proteins in buffer or in PEG solutions. Polymer-dependent changes in the tryptophan fluorescence spectra of three structurally-distinct proteins reveal that soluble, 100 kDa pSB interacts directly with all three proteins and changes both the local polarity near tryptophan residues and the protein conformation. Thermal denaturation studies show that the protein melting temperatures decrease by as much as ∼1.9 °C per weight percent of polymer and that protein folding cooperativity increases by as much as ∼130 J mol-1 K-1 per weight percent of polymer. The exact extent of the changes is protein-dependent, as some proteins exhibit increased stability, whereas others experience decreased stability at high soluble pSB concentrations. These results suggest that pSB is not universally protein-repellent and that its efficacy in biotechnological applications will depend on the specific proteins used.
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7
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Pelegri-O’Day EM, Paluck SJ, Maynard HD. Substituted Polyesters by Thiol-Ene Modification: Rapid Diversification for Therapeutic Protein Stabilization. J Am Chem Soc 2017; 139:1145-1154. [PMID: 28079370 PMCID: PMC5509517 DOI: 10.1021/jacs.6b10776] [Citation(s) in RCA: 67] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
Many proteins, especially those used as therapeutics, are unstable to storage and shipping temperatures, leading to increased costs in research and industry. Therefore, the design and synthesis of novel stabilizers is an important area of investigation. Herein we report new degradable polymers that stabilize proteins to environmental stressors such as refrigeration and elevated temperature. Specifically, polycaprolactones with different pendant groups were synthesized and surveyed for their ability to stabilize an important therapeutic protein to storage and shipping conditions. Ring-opening polymerization (ROP) of an allyl-substituted caprolactone monomer was carried out using the organocatalyst 1,5,7-triazabicyclo[4.4.0]dec-5-ene (TBD) to yield a well-defined, alkene-substituted degradable polymer, which was used as a common backbone to control for the degree of polymerization. Relevant side chains such as trehalose, lactose, glucose, carboxybetaine, and oligo(ethylene glycol) were installed via postpolymerization thiol-ene reactions. These degradable polymers were then employed as excipients for the stabilization of the therapeutic protein granulocyte colony-stimulating factor (G-CSF) against storage at 4 °C and shipping temperatures of 60 °C. The best stabilization was observed using the trehalose- and zwitterion- substituted polyesters. Both the trehalose- and carboxybetaine-substituted pCL were further investigated with regard to molecular weight dependence, and it was found that the molecular weight was minimally important for stabilization to refrigeration, but critical for G-CSF stabilization at elevated temperatures. Both high performing zwitterionic and trehalose polyesters were also degraded, and the polymers and degradation products were shown to be noncytotoxic. This work provides potential biocompatible polymers for stabilization of the important therapeutic G-CSF, as well as a general platform for the future discovery of new polymeric protein stabilizers.
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Affiliation(s)
- Emma M. Pelegri-O’Day
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
| | - Samantha J. Paluck
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
| | - Heather D. Maynard
- Department of Chemistry and Biochemistry and California NanoSystems Institute, University of California, Los Angeles, 607 Charles E. Young Drive East, Los Angeles, California 90095, USA
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8
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Raja MA, Arif M, Feng C, Zeenat S, Liu CG. Synthesis and evaluation of pH-sensitive, self-assembled chitosan-based nanoparticles as efficient doxorubicin carriers. J Biomater Appl 2017; 31:1182-1195. [PMID: 28081668 DOI: 10.1177/0885328216681184] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
A novel pH-responsive polymer based on amphiphilic N-acetyl histidine and arginine-grafted chitosan was synthesized using N-acetyl histidine as hydrophobic segment and arginine as hydrophilic segment by 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide-mediated coupling reactions as anticancer drug delivery system for doxorubicin. The structure of the synthesized polymer was confirmed by Fourier transform infrared and 1H nuclear magnetic resonance analysis. Due to self-association behavior, N-acetyl histidine and arginine-grafted chitosan structured nanoparticles with in size range of 204 nm. N-acetyl histidine and arginine-grafted chitosan with different substitution degree of N-acetyl histidine were initially prepared and characterized. The critical micelle concentration decreased with increasing substitution degree of N-acetyl histidine. Furthermore, N-acetyl histidine and arginine-grafted chitosan nanoparticles exhibited an acidic pH-triggered aggregation and disassembling nature. The doxorubicin-encapsulated nanoparticles based on synthesized conjugate ( N-acetyl histidine and arginine-grafted chitosan/doxorubicin nanoparticles) showed a sustained drug release pattern, which could be hastened under acidic pH conditions but delayed with increasing substitution degree of N-acetyl histidine. Anticancer effects demonstrated that N-acetyl histidine and arginine-grafted chitosan/doxorubicin nanoparticles could suppress both sensitive and resistant human breast tumor cell line (MCF-7) efficiently in a dose- and time-dependent pattern. Confocal microscopy results evidenced increased cellular uptake and enhanced retention of the synthesized nanoparticles in drug-resistant cells demonstrating better efficacy of nanoparticles over native doxorubicin. These results suggest that N-acetyl histidine and arginine-grafted chitosan/doxorubicin nanoparticles might be promising carriers for delivery of hydrophobic drug doxorubicin against drug-resistant tumors.
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Affiliation(s)
- Mazhar Ali Raja
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Muhammad Arif
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Chao Feng
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Shah Zeenat
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
| | - Chen-Guang Liu
- College of Marine Life Sciences, Ocean University of China, Qingdao, PR China
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9
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Addition of Zinc Improves the Physical Stability of Insulin in the Primary Emulsification Step of the Poly(lactide-co-glycolide) Microsphere Preparation Process. Polymers (Basel) 2015. [DOI: 10.3390/polym7050836] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
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10
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Silva MA, Chuong M, Kerr S, Cabrera A. Stability of Two Long-Acting Insulin Formulations after 28 Days. JOURNAL OF PHARMACY PRACTICE AND RESEARCH 2015. [DOI: 10.1002/j.2055-2335.2013.tb00213.x] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
| | | | | | - Adriana Cabrera
- School of Pharmacy; Massachusetts College of Pharmacy and Health Sciences; Worcester Massachusetts
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11
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Akash MSH, Rehman K, Chen S. Polymeric-based particulate systems for delivery of therapeutic proteins. Pharm Dev Technol 2015; 21:367-78. [DOI: 10.3109/10837450.2014.999785] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Affiliation(s)
- Muhammad Sajid Hamid Akash
- Institute of Pharmacology, Toxicology, and Biochemical Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China,
- Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan, and
| | - Kanwal Rehman
- Faculty of Pharmaceutical Sciences, Government College University Faisalabad, Faisalabad, Pakistan, and
- Department of Toxicology, School of Medicine and Public Health, Zhejiang University, Hangzhou, China
| | - Shuqing Chen
- Institute of Pharmacology, Toxicology, and Biochemical Pharmaceutics, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, China,
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12
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Han F, Zhou F, Yang X, Zhao J, Zhao Y, Yuan X. Facile preparation of PLGA microspheres with diverse internal structures by modified double-emulsion method for controlled release. POLYM ENG SCI 2014. [DOI: 10.1002/pen.23957] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Fengxuan Han
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 China
| | - Fang Zhou
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 China
| | - Xiaoling Yang
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 China
| | - Jin Zhao
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 China
| | - Yunhui Zhao
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 China
| | - Xiaoyan Yuan
- School of Materials Science and Engineering, and Tianjin Key Laboratory of Composite and Functional Materials; Tianjin University; Tianjin 300072 China
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13
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Multi-arm histidine copolymer for controlled release of insulin from poly(lactide-co-glycolide) microsphere. Biomaterials 2012; 33:8848-57. [DOI: 10.1016/j.biomaterials.2012.08.042] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Accepted: 08/17/2012] [Indexed: 11/23/2022]
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14
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Wu JL, Liu CG, Wang XL, Huang ZH. Preparation and characterization of nanoparticles based on histidine-hyaluronic acid conjugates as doxorubicin carriers. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2012; 23:1921-1929. [PMID: 22580754 DOI: 10.1007/s10856-012-4665-8] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/16/2011] [Accepted: 04/26/2012] [Indexed: 05/31/2023]
Abstract
Histidine-hyaluronic acid (His-HA) conjugates were synthesized using hyaluronic acid (HA) as a hydrophilic segment and histidine (His) as hydrophobic segment by 1-ethyl-3(3-dimethylaminopropyl)carbodiimide (EDC) mediated coupling reactions. The structural characteristics of the His-HA conjugates were investigated using (1)H NMR. His-HA nanoparticles (HH-NPs) were prepared based on His-HA conjugates, and the characteristics of HH-NPs were investigated using dynamic light scattering, transmission electron microscopy (TEM), scanning electron microscopy (SEM), and fluorescence spectroscopy. The particles were between 342 and 732 nm in size, depending on the degree of substitution (DS) of the His. TEM and SEM images indicated that the morphology of HH-NPs was spherical in shape. The critical aggregation concentrations of HH-NPs ranged from 0.034 to 0.125 mg/ml, which decreased with an increase in the DS of the His. Images of fluorescence microscopy indicate that HH-NPs were taken up by the cancer cell line (MCF-7), and significantly decreased by competition inhibition of free HA. From the cytotoxicity test, it was found that DOX-loaded HH-NPs exhibited similar dose and time-dependent cytotoxicity against MCF-7 cells with free DOX.
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Affiliation(s)
- Jing-liang Wu
- College of Marine Life Science, Ocean University of China, Qingdao, People's Republic of China
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15
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Chu MKL, Chen J, Gordijo CR, Chiang S, Ivovic A, Koulajian K, Giacca A, Wu XY, Sun Y. In vitro and in vivo testing of glucose-responsive insulin-delivery microdevices in diabetic rats. LAB ON A CHIP 2012; 12:2533-2539. [PMID: 22565220 DOI: 10.1039/c2lc40139h] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
We have developed glucose-responsive implantable microdevices for closed-loop delivery of insulin and conducted in vivo testing of these devices in diabetic rats. The microdevices consist of an albumin-based bioinorganic membrane that utilizes glucose oxidase (GOx), catalase (CAT) and manganese dioxide (MnO(2)) nanoparticles to convert a change in the environmental glucose level to a pH stimulus, which regulates the volume of pH-sensitive hydrogel nanoparticles and thereby the permeability of the membrane. The membrane is integrated with microfabricated PDMS (polydimethylsiloxane) structures to form compact, stand-alone microdevices, which do not require tethering wires or tubes. During in vitro testing, the microdevices showed glucose-responsive insulin release over multiple cycles at clinically relevant glucose concentrations. In vivo, the microdevices were able to counter hyperglycemia in diabetic rats over a one-week period. The in vitro and in vivo testing results demonstrated the efficacy of closed-loop biosensing and rapid response of the 'smart' insulin delivery devices.
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Affiliation(s)
- Michael K L Chu
- Mechanical and Industrial Engineering, University of Toronto, Toronto, Ontario, Canada
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16
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Nanoscaled buffering zone of charged (PLGA)n-b-bPEI micelles in acidic microclimate for potential protein delivery application. J Control Release 2012; 160:440-50. [PMID: 22405902 DOI: 10.1016/j.jconrel.2012.02.024] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2011] [Revised: 02/06/2012] [Accepted: 02/26/2012] [Indexed: 11/23/2022]
Abstract
Poly(lactide-co-glycolide) (PLGA) has most often been employed for the controlled release of protein formulations because of its safety profile with non-toxic degradation products. Nevertheless, such formulations have been plagued by a local acidic microenvironment and protein-polymer interactions, which result in chemical and physical denaturation of loaded proteins and often unfavorable release profiles. This study investigated the pH change of inner PLGA microsphere (MS) using charged (PLGA)(n)-b-branched polyethyleneimine (bPEI) micelles. The designed micelles can be transformed into either micelle or reverse micelle (RM) depending on the solvent and RM can form microspheres. In addition, (PLGA)(n)-b-bPEI can be modified into (PLGA)(n)-b-(carboxylated bPEI) via carboxylation of the primary amines. Cationic micelle (CM) or anionic micelle (AM) was complexed with counter-charged proteins leading to nanosized particles (approximately 100nm). In the micelle/protein complexes, the micelles mostly maintained their proton buffering capacity, and consequently, prevented or delayed the typical decrease in pH caused by degradation of PLGA in aqueous solution. Reconstitutable micelle/protein complexes allowed for increased and fine-tuned protein loading (~20wt.% when using CM1 (CM prepared from PLGA(36kDa)-b-bPEI(25kDa))/insulin complexes) in PLGA MS. In CM2 (CM prepared from (PLGA(36kDa))(2)-b-bPEI(25kDa))/insulin (4 of weight ratio (WR) of micelle to protein; WR4)-loaded PLGA MS, CM2 strongly prevented the micellar nanoenvironmental pH (pH 6.6 within 5days and then approximately pH 8.5) to be acidified in PLGA MS for 9weeks, unlike CM2-free PLGA MS. In conclusion, our findings propose that the proton buffering capacity and protein loading in PLGA MS can be tuned by controlling the complexation ratios of micelles and proteins, polymeric architectures of (PLGA)(n)-b-bPEI copolymers and WR of micelle/protein complexes and PLGA (or RM).
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17
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Malik R, Roy I. Probing the mechanism of insulin aggregation during agitation. Int J Pharm 2011; 413:73-80. [DOI: 10.1016/j.ijpharm.2011.04.024] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 04/12/2011] [Accepted: 04/14/2011] [Indexed: 11/28/2022]
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18
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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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19
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Tantipolphan R, Romeijn S, Engelsman JD, Torosantucci R, Rasmussen T, Jiskoot W. Elution behavior of insulin on high-performance size exclusion chromatography at neutral pH. J Pharm Biomed Anal 2010; 52:195-202. [PMID: 20129751 DOI: 10.1016/j.jpba.2010.01.014] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2009] [Revised: 01/08/2010] [Accepted: 01/08/2010] [Indexed: 11/30/2022]
Abstract
The pharmacopoeia protocol for HP-SEC of insulin, using an acidic non-physiological eluent, does not represent insulin's association state in the formulation. This study aimed to evaluate insulin's elution behavior in HP-SEC in a "physiological" (aqueous, neutral pH) eluent, using on-line UV absorption and multi-angle laser light scattering detection. The effect of insulin concentration and association state in the formulation (monitored by circular dichroism) and eluent composition (zinc ion, arginine) on its elution behavior was assessed. We showed that the elution behavior of insulin in "physiological" HP-SEC is affected by both dynamic association-dissociation of insulin molecules and insulin-column interactions. Insulin molecules re-equilibrated in the HP-SEC eluent, making its elution behavior practically insensitive to the association state of insulin in the formulation. Zinc ions in the eluent promoted association of insulin to hexamers, whereas arginine overruled the effect of zinc ions and induced on-column dissociation of insulin to dimers and monomers. Combined results from "physiological" and compendial HP-SEC were shown to provide a better view of the aggregation state of heat-stressed insulin than either of the single methods. The insights obtained with this study are crucial for a proper evaluation of HP-SEC data of insulin.
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Affiliation(s)
- Ruedeeporn Tantipolphan
- Division of Drug Delivery Technology, Leiden/Amsterdam Center for Drug Research, Leiden University, PO Box 9502, 2300 RA, Leiden, The Netherlands
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Dermatan sulfate as a stabilizer for protein stability in poly(lactide-co-glycolide) depot. BIOTECHNOL BIOPROC E 2009. [DOI: 10.1007/s12257-009-0058-3] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Jorgensen L, Hostrup S, Moeller EH, Grohganz H. Recent trends in stabilising peptides and proteins in pharmaceutical formulation – considerations in the choice of excipients. Expert Opin Drug Deliv 2009; 6:1219-30. [DOI: 10.1517/17425240903199143] [Citation(s) in RCA: 94] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Park W, Na K. Polyelectrolyte complex of chondroitin sulfate and peptide with lower pI value in poly(lactide-co-glycolide) microsphere for stability and controlled release. Colloids Surf B Biointerfaces 2009; 72:193-200. [PMID: 19414243 DOI: 10.1016/j.colsurfb.2009.04.002] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2009] [Revised: 04/01/2009] [Accepted: 04/01/2009] [Indexed: 10/20/2022]
Abstract
A polyelectrolyte complex between a therapeutic peptide and chargeable polymer was applied to prevent peptide denaturation in poly(lactide-co-glycolide) (PLGA) microspheres. Chondroitin sulfate A (CsA) was employed as a polymeric additive for the formation of an ionic complex with insulin (InS). The complex prepared at pH 3.0 evidenced a nano-size in the range of 100-400 nm with a mono distribution. The stability of InS in the complex in an organic/water (O/W) interface was verified via RP-HPLC. The insulin in the complex evidenced a retention time almost identical to native InS, whereas free insulin did not evidence such a retention time. On the basis of these studies, PLGA microspheres including a complex with various CsA/InS ratios were prepared via a double-emulsion method (PLGA/CsA MS). InS loading efficiency in the system is higher than that of the microspheres without CsA. The system evidenced a lower initial burst and, following the initial burst, continuous release kinetics for 30 days. Circular dichroism (CD) spectra demonstrated that the insulin in PLGA/CsA MS is more stable than the PLGA-only microspheres (PLGA/only MS) for 20 days. These results indicate that the complex system with CsA is useful for the long-term delivery of peptides with lower pI values.
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Affiliation(s)
- Wooram Park
- Department of Biotechnology, The Catholic University of Korea, 43-1 Yeokkok2-dong, Wonmi-gu, Bucheon-si, Gyeonggi-do, 420-743, Republic of Korea
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van der Walle CF, Sharma G, Ravi Kumar MNV. Current approaches to stabilising and analysing proteins during microencapsulation in PLGA. Expert Opin Drug Deliv 2009; 6:177-86. [DOI: 10.1517/17425240802680169] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Kim BS, Oh JM, Hyun H, Kim KS, Lee SH, Kim YH, Park K, Lee HB, Kim MS. Insulin-Loaded Microcapsules for In Vivo Delivery. Mol Pharm 2009; 6:353-65. [DOI: 10.1021/mp800087t] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Byung Soo Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Jae Min Oh
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Hoon Hyun
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Kyung Sook Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Sang Hyo Lee
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Yu Han Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Kinam Park
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Hai Bang Lee
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
| | - Moon Suk Kim
- Fusion Biotechnology Research Center, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong, Daejeon 305-600, Korea, and Departments of Biomedical Engineering and Pharmaceutics, Purdue University, 206 S. Intramural Drive, West Lafayette, Indiana 47907-1791
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Abstract
Here we describe the preparation of BSA-FITC-loaded microcapsules as a model protein system for in vivo delivery. BSA-FITC-loaded microcapsules were prepared using a mono-axial nozzle ultrasonic atomizer, varying a number of parameters to determine optimal conditions. The preparation method chosen resulted in a BSA-FITC encapsulation efficiency of approximately 60% and a particle size of approximately 50 microm. An analysis of the microcapsules showed a BSA-FITC core surrounded by a poly(D,L-lactic-co-glycolic acid) (PLGA) shell. Injection of BSA-FITC-loaded microcapsules into rats resulted in a sustained release of BSA-FITC that maintained increased concentrations of BSA-FITC in plasma for up to 2 weeks. In contrast, the concentration of BSA-FITC in plasma after injection of BSA-FITC-only solution reached near-zero levels within 3 days. Fluorescence images of microcapsules removed at various times after implantation showed a gradual decrease of BSA-FITC in BSA-FITC-loaded microcapsules, confirming a sustained in vivo release of BSA-FITC. The duration of in vivo release and plasma concentration of BSA-FITC was correlated with the initial dose of BSA-FITC. BSA-FITC-loaded microcapsules maintained their structure for at least 4 weeks in the rat. The inflammatory response observed initially after injection declined over time. In conclusion, BSA-FITC-loaded microcapsules achieved sustained release of BSA-FITC, suggesting that microcapsules manufactured as described may be useful for in vivo delivery of pharmacologically active proteins.
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Role of a novel multifunctional excipient poly(ethylene glycol)-block-oligo(vinyl sulfadimethoxine) in controlled release of lysozyme from PLGA microspheres. Int J Pharm 2008; 358:50-9. [DOI: 10.1016/j.ijpharm.2008.02.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2007] [Revised: 02/04/2008] [Accepted: 02/11/2008] [Indexed: 11/17/2022]
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Taluja A, Youn YS, Bae YH. Novel approaches in microparticulate PLGA delivery systems encapsulating proteins. ACTA ACUST UNITED AC 2007. [DOI: 10.1039/b706939a] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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