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Kim JH, Ryu CH, Chon CH, Kim S, Lee S, Maharjan R, Kim NA, Jeong SH. Three months extended-release microspheres prepared by multi-microchannel microfluidics in beagle dog models. Int J Pharm 2021; 608:121039. [PMID: 34450228 DOI: 10.1016/j.ijpharm.2021.121039] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2021] [Revised: 08/19/2021] [Accepted: 08/22/2021] [Indexed: 02/06/2023]
Abstract
To evaluate in vivo drug release profiles in beagle dogs, finasteride-loaded PLGA microspheres were prepared using a novel method of IVL-PPF Microsphere® microfluidic device. Briefly, the dispersed phase (PLGA and finasteride in dichloromethane) was mixed with the continuous phase (0.25% w/v PVA aqueous solution) in the parallelized microchannels. After lyophilization, the diameter of the microspheres was around 40 μm (PLGA 7502A or 5002A) and around 30 µm (PLGA/PLA02A mixture). Their CV and span values suggested a narrow size distribution in repeated batch preparations. The in vivo drug release from the PLGA microspheres exhibited three substantial phases: an initial burst, a moderate release, and then a plateau. The microspheres based on PLGA 7502A (75:25 co-polymer) demonstrated extended drug release for around 1 month with a minimized initial burst release compared to PLGA 5002A (50:50 co-polymer). Moreover, the in vivo drug release profile in beagle dogs was proportionally related to the amount of drug loading. Furthermore, the addition of PLA02A into the fabrication of the microsphere synergistically extended the drug release up to 3 months. These results demonstrated the value of this method to achieve uniform microspheres and extend the drug release properties with interpretative in vivo PK profiles.
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Affiliation(s)
- Ju Hee Kim
- Inventage Lab Inc, Seongnam, Gyeonggi 13438, Republic of Korea.
| | - Choong Ho Ryu
- Inventage Lab Inc, Seongnam, Gyeonggi 13438, Republic of Korea.
| | - Chan Hee Chon
- Inventage Lab Inc, Seongnam, Gyeonggi 13438, Republic of Korea.
| | - Seyeon Kim
- Inventage Lab Inc, Seongnam, Gyeonggi 13438, Republic of Korea.
| | - Sangno Lee
- Inventage Lab Inc, Seongnam, Gyeonggi 13438, Republic of Korea.
| | - Ravi Maharjan
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University, Gyeonggi 10326, Republic of Korea.
| | - Nam Ah Kim
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University, Gyeonggi 10326, Republic of Korea.
| | - Seong Hoon Jeong
- BK21 FOUR Team and Integrated Research Institute for Drug Development, College of Pharmacy, Dongguk University, Gyeonggi 10326, Republic of Korea.
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Alotaibi BS, Buabeid M, Ibrahim NA, Kharaba ZJ, Ijaz M, Murtaza G. Recent strategies driving oral biologic administration. Expert Rev Vaccines 2021; 20:1587-1601. [PMID: 34612121 DOI: 10.1080/14760584.2021.1990044] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
INTRODUCTION High patient compliance, noninvasiveness, and self-administration are the leading features of vaccine delivery through the oral route. The implementation of swift mass vaccination campaigns in pandemic outbreaks fascinates the use of oral vaccination. This approach can elicit both mucosal and systemic immune responses to protect against infection at the surface of the mucosa. AREA COVERED As pathogen entry and spread mainly occurs through the gastrointestinal tract (GIT) mucosal surfaces, oral vaccination may protect and limit disease spread. Oral vaccines target various potential mucosal inductive sites in the GIT, such as the oral cavity, gastric area, and small intestine. Orally delivered vaccines having subunit and nucleic acid pass through various GIT-associated risks, such as the biodegradation of biologics and their reduced absorption. This article presents a summarized review of the existing technologies and prospects for oral vaccination. EXPERT OPINION The intestinal mucosa focuses on current approaches, while future strategies target new mucosal sites, i.e. oral cavity and stomach. Recent developments in biologic delivery through the oral route and their potential use in future oral vaccination are mainly considered.
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Affiliation(s)
- Badriyah Shadid Alotaibi
- Department of Pharmaceutical Sciences, College of Pharmacy, Princess Nourah Bint Abdulrahman University, Riyadh, Saudi Arabia
| | - Manal Buabeid
- Department of Clinical Sciences, Ajman University, Ajman, 346, UAE.,Medical and Bio-allied Health Sciences Research Centre, Ajman University, Ajman, United Arab Emirates
| | - Nihal Abdalla Ibrahim
- Department of Clinical Sciences, Ajman University, Ajman, 346, UAE.,Medical and Bio-allied Health Sciences Research Centre, Ajman University, Ajman, United Arab Emirates
| | - Zelal Jaber Kharaba
- Department of Clinical Sciences, College of Pharmacy, Al-Ain University of Science and Technology, Abu Dhabi, United Arab Emirates
| | - Munazza Ijaz
- Institute of Molecular Biology and Biotechnology, The University of Lahore, Lahore, Pakistan
| | - Ghulam Murtaza
- Department of Pharmacy, COMSATS University Islamabad, Lahore, 54000, Pakistan
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Coffey JW, Gaiha GD, Traverso G. Oral Biologic Delivery: Advances Toward Oral Subunit, DNA, and mRNA Vaccines and the Potential for Mass Vaccination During Pandemics. Annu Rev Pharmacol Toxicol 2021; 61:517-540. [PMID: 32466690 PMCID: PMC8057107 DOI: 10.1146/annurev-pharmtox-030320-092348] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Oral vaccination enables pain-free and self-administrable vaccine delivery for rapid mass vaccination during pandemic outbreaks. Furthermore, it elicits systemic and mucosal immune responses. This protects against infection at mucosal surfaces, which may further enhance protection and minimize the spread of disease. The gastrointestinal (GI) tract presents a number of prospective mucosal inductive sites for vaccine targeting, including the oral cavity, stomach, and small intestine. However, currently available oral vaccines are effectively limited to live-attenuated and inactivated vaccines against enteric diseases. The GI tract poses a number of challenges,including degradative processes that digest biologics and mucosal barriers that limit their absorption. This review summarizes the approaches currently under development and future opportunities for oral vaccine delivery to established (intestinal) and relatively new (oral cavity, stomach) mucosal targets. Special consideration is given to recent advances in oral biologic delivery that offer promise as future platforms for the administration of oral vaccines.
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Affiliation(s)
- Jacob William Coffey
- Department of Chemical Engineering and David H. Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Microbiology and Immunology, Peter Doherty Institute for Infection and Immunology, University of Melbourne, Victoria, 3000, Australia
| | - Gaurav Das Gaiha
- Ragon Institute of MGH, MIT and Harvard, Cambridge, Massachusetts 02139, USA
- Gastrointestinal Unit, Massachusetts General Hospital, Boston, Massachusetts 02114, USA
| | - Giovanni Traverso
- Division of Gastroenterology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts 02115, USA
- Department of Mechanical Engineering, Massachusetts Institute of Technology, Cambridge, Massachusetts 02139, USA;
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Wang S, Feng X, Liu P, Wei Y, Xiao B. Blending of PLGA-PEG-PLGA for Improving the Erosion and Drug Release Profile of PCL Microspheres. Curr Pharm Biotechnol 2020; 21:1079-1087. [PMID: 31893987 DOI: 10.2174/1389201021666200101104116] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2019] [Revised: 12/10/2019] [Accepted: 12/26/2019] [Indexed: 11/22/2022]
Abstract
BACKGROUND PCL has a long history as an industrialized biomaterial for preparing microspheres, but its hydrophobic property and slow degradation rate often cause drug degeneration, quite slow drug release rate and undesirable tri-phasic release profile. MATERIALS AND METHODS In this study, we used the blending material of PLGA-PEG-PLGA and PCL to prepare microspheres. The microspheres degradation and drug release behaviors were evaluated through their molecular weight reduction rate, mass loss rate, morphology erosion and drug release profile. The hydrophilic PLGA-PEG-PLGA is expected to improve the degradation and drug release behaviors of PCL microspheres. RESULTS Microspheres in blending materials exhibited faster erosion rates than pure PCL microspheres, forming holes much quickly on the particle's surface for the drug to diffuse out. A higher proportion of PLGA-PEG-PLGA caused faster degradation and erosion rates. The blending microspheres showed much faster drug release rates than pure PCL microspheres. CONCLUSION With blending of 25wt% PLGA-PEG-PLGA, the release rate of microspheres speeded up significantly, while, with a further increase of PLGA-PEG-PLGA proportion (50%, 75%, 100%), it accelerated a little. The microspheres with PCL/PLGA-PEG-PLGA of 1/1 exhibited a linear-like drug release profile. The results could be a guideline for preparing microspheres based on blending materials to obtain a desirable release.
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Affiliation(s)
- Siyuan Wang
- Department of Orthopaedics, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430077, China
| | - Xiaobo Feng
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430022, China
| | - Ping Liu
- Department of Orthopaedics, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430077, China
| | - Youxiu Wei
- Department of Orthopaedics, Liyuan Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430077, China
| | - Baojun Xiao
- Department of Orthopaedics, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology (HUST), Wuhan 430022, China
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Yang L, Liu Y, Shou X, Ni D, Kong T, Zhao Y. Bio-inspired lubricant drug delivery particles for the treatment of osteoarthritis. NANOSCALE 2020; 12:17093-17102. [PMID: 32785325 DOI: 10.1039/d0nr04013d] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/25/2023]
Abstract
Osteoarthritis is a chronic and irreversible degenerative disease that often occurs in middle-aged and elderly people. Although many clinical therapeutics like intra-articular drug injection have been widely used for treating osteoarthritis, there are still some shortcomings that need to be overcome such as frequent injection, inflammatory response, and potential overdose. Inspired by the natural biocompatible lubricant substances, hyaluronic acid (HA), a novel bio-inspired lubricant drug delivery microcarrier with pathological-state responsive switches, was developed for osteoarthritis treatment. In this system, a temperature-responsive hydrogel was used to form an inverse opal-structured microsphere scaffold to increase the drug loading efficiency, while HA was employed as a vehicle to encapsulate drugs. Due to the properties of the scaffold, the loaded lubricant and encapsulated drugs can be released when temperature rises in the joint cavity during exercise or osteoarthritis. In contrast, the delivery system will be locked and the drug release process will stop when the arthritis lessens or exercise is stopped. Thus, the designed microcarrier is endowed with the ability of intelligently releasing drugs and lubricants for curing osteoarthritis, demonstrating its great potential in biomedical applications.
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Affiliation(s)
- Lei Yang
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China. and Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Clinical College of Xuzhou Medical University, Nanjing 210008, P. R. China. and State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yuxiao Liu
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Clinical College of Xuzhou Medical University, Nanjing 210008, P. R. China. and State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Xin Shou
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China. and Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Clinical College of Xuzhou Medical University, Nanjing 210008, P. R. China. and State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Dong Ni
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Tiantian Kong
- Guangdong Key Laboratory for Biomedical Measurements and Ultrasound Imaging, Department of Biomedical Engineering, Shenzhen University, Shenzhen 518060, China.
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, Clinical College of Xuzhou Medical University, Nanjing 210008, P. R. China. and State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
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John G, Nagarajan S, Vemula PK, Silverman JR, Pillai C. Natural monomers: A mine for functional and sustainable materials – Occurrence, chemical modification and polymerization. Prog Polym Sci 2019. [DOI: 10.1016/j.progpolymsci.2019.02.008] [Citation(s) in RCA: 51] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Yildirim I, Weber C, Schubert US. Old meets new: Combination of PLA and RDRP to obtain sophisticated macromolecular architectures. Prog Polym Sci 2018. [DOI: 10.1016/j.progpolymsci.2017.07.010] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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8
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He Y, Liu P, Shi C, Liu Y, Liu S, Feng X, Fu D. The influence of hydrophilic mPEG segment on formation, morphology, and properties of PCL-mPEG microspheres. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21887] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Affiliation(s)
- Yu He
- Department of Orthopaedics; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
| | - Ping Liu
- Department of Orthopaedics; Li Yuan Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
| | - Chen Shi
- Department of Pharmacy; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
| | - Yongwei Liu
- Department of Orthopaedics; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
| | - Songxiang Liu
- Department of Orthopaedics; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
| | - Xiaobo Feng
- Department of Orthopaedics; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
| | - Dehao Fu
- Department of Orthopaedics; Union Hospital; Tongji Medical College; Huazhong University of Science and Technology (HUST); Wuhan China
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Li J, Ding J, Liu T, Liu JF, Yan L, Chen X. Poly(lactic acid) Controlled Drug Delivery. INDUSTRIAL APPLICATIONS OF POLY(LACTIC ACID) 2017. [DOI: 10.1007/12_2017_11] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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10
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Effects of the molecular weight of PLGA on degradation and drug release in vitro from an mPEG-PLGA nanocarrier. Chem Res Chin Univ 2016. [DOI: 10.1007/s40242-016-6155-x] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Shi C, Feng S, Liu P, Liu X, Feng X, Fu D. A novel study on the mechanisms of drug release in PLGA-mPEG microspheres with fluorescent drug. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2016; 27:854-64. [DOI: 10.1080/09205063.2016.1166727] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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12
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Gu B, Sun X, Papadimitrakopoulos F, Burgess DJ. Seeing is believing, PLGA microsphere degradation revealed in PLGA microsphere/PVA hydrogel composites. J Control Release 2016; 228:170-178. [PMID: 26965956 DOI: 10.1016/j.jconrel.2016.03.011] [Citation(s) in RCA: 64] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2015] [Revised: 02/28/2016] [Accepted: 03/06/2016] [Indexed: 12/23/2022]
Abstract
The aim of this study was to understand the polymer degradation and drug release mechanism from PLGA microspheres embedded in a PVA hydrogel. Two types of microspheres were prepared with different molecular weight PLGA polymers (approximately 25 and 7 kDa) to achieve different drug release profiles, with a 9-day lag phase and without a lag phase, respectively. The kinetics of water uptake into the microspheres coincided with the drug release profiles for both formulations. For the 25 kDa microspheres, minimal water uptake was observed in the early part of the lag phase followed by substantial water uptake at the later stages and in the drug release phase. For the 7 kDa microspheres, water uptake occurred simultaneously with drug release. Water uptake was approximately 2-3 times that of the initial microsphere weight for both formulations. The internal structure of the PLGA microspheres was evaluated using low temperature scanning electron microscopy (cryo-SEM). Burst drug release occurred followed by pore forming from the exterior to the core of both microspheres. A well-defined hydrogel/microsphere interface was observed. For the 25 kDa microspheres, internal pore formation and swelling occurred before the second drug release phase. The surface layer of the microspheres remained intact whereas swelling, and degradation of the core continued throughout the drug release period. In addition, microsphere swelling reduced glucose transport through the coatings in PBS media and this was considered to be a as a consequence of the increased thickness of the coatings. The combination of the swelling and microdialysis results provides a fresh understanding on the competing processes affecting molecular transport of bioanalytes (i.e. glucose) through these composite coatings during prolonged exposure in PBS.
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Affiliation(s)
- Bing Gu
- University of Connecticut, School of Pharmacy, Storrs 06269, USA
| | - Xuanhao Sun
- University of Connecticut, Bioscience Electron Microscopy Laboratory, Storrs 06269, USA
| | | | - Diane J Burgess
- University of Connecticut, School of Pharmacy, Storrs 06269, USA.
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Ajiro H, Kuroda A, Kan K, Akashi M. Stereocomplex Film Using Triblock Copolymers of Polylactide and Poly(ethylene glycol) Retain Paxlitaxel on Substrates by an Aqueous Inkjet System. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2015; 31:10583-10589. [PMID: 26343286 DOI: 10.1021/acs.langmuir.5b03169] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
The stereocomplex formation of poly(L,L-lactide) (PLLA) and poly(D,D-lactide) (PDLA) using an inkjet system was expanded to the amphiphilic copolymers, using poly(ethylene glycol) (PEG) as a hydrophilic polymer. The diblock copolymers, which are composed of PEG and PLLA (MPEG-co-PLLA) and PEG and PDLA (MPEG-co-PDLA), were employed for thin-film preparation using an aqueous inkjet system. The solvent and temperature conditions were optimized for the stereocomplex formation between MPEG-co-PLLA and MPEG-co- PDLA. As a result, the stereocomplex was adequately formed in acetonitrile/water (1:1, v/v) at 40 °C. The aqueous conditions improved the stereocomplex film preparation, which have suffered from clogging when using the organic solvents in previous work. The triblock copolymers, PLLA-co-PEG-co-PLLA and PDLA-co-PEG-co-PDLA, were employed for square patterning with the inkjet system, which produced thin films. The amphiphilic polymer film was able to retain hydrophobic compounds inside. The present result contributed to the rapid film preparation by inkjet, retaining drugs with difficult solubility in water, such as paclitaxel within the films.
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Affiliation(s)
- Hiroharu Ajiro
- Department of Applied Chemistry, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- The Center for Advanced Medical Engineering and Informatics, Osaka University , 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan
- Precursory Research for Embryonic Science and Technology (PRESTO), Japan Science and Technology Agency (JST) , 4-1-8 Honcho, Kawaguchi, Saitama 332-0012, Japan
| | - Ayaka Kuroda
- Department of Applied Chemistry, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
| | | | - Mitsuru Akashi
- Department of Applied Chemistry, Osaka University , 2-1 Yamada-oka, Suita, Osaka 565-0871, Japan
- The Center for Advanced Medical Engineering and Informatics, Osaka University , 2-2 Yamada-oka, Suita, Osaka 565-0871, Japan
- Graduate School of Frontier Biosciences, Osaka University , 1-3 Yamada-oka, Suita, Osaka 565-0871, Japan
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Feng SB, Fu DH, Nie L, Zou P, Suo JP. A detailed view of PLGA-mPEG microsphere formation by double emulsion solvent evaporation method. CHINESE JOURNAL OF POLYMER SCIENCE 2015. [DOI: 10.1007/s10118-015-1660-9] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Gainza G, Villullas S, Pedraz JL, Hernandez RM, Igartua M. Advances in drug delivery systems (DDSs) to release growth factors for wound healing and skin regeneration. NANOMEDICINE-NANOTECHNOLOGY BIOLOGY AND MEDICINE 2015; 11:1551-73. [PMID: 25804415 DOI: 10.1016/j.nano.2015.03.002] [Citation(s) in RCA: 167] [Impact Index Per Article: 18.6] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 10/10/2014] [Revised: 03/03/2015] [Accepted: 03/03/2015] [Indexed: 12/23/2022]
Abstract
UNLABELLED Current advances in novel drug delivery systems (DDSs) to release growth factors (GFs) represent a great opportunity to develop new therapies or enhance the effectiveness of available medical treatments. These advances are particularly relevant to the field of regenerative medicine, challenging healthcare issues such as wound healing and skin repair. To this end, biocompatible biomaterials have been extensively studied to improve in vivo integration of DDSs, to enhance the bioactivity of the released drugs and to deliver bioactive molecules in a localised and controlled manner. Thus, this review presents an overview of DDSs to release GFs for skin regeneration, particularly emphasising on (i) polymeric micro and nanospheres, (ii) lipid nanoparticles, (iii) nanofibrous structures, (iv) hydrogels and (v) scaffolds. In addition, this review summarises the current animal models available for studying wound healing and the clinical trials and marketed medications based on GF administration indicated for chronic wound treatment. FROM THE CLINICAL EDITOR Chronic wounds currently pose a significant burden worldwide. With advances in science, novel drug delivery systems have been developed for growth factors delivery. In this comprehensive review, the authors highlighted current drug delivery systems for the enhancement of wound healing and their use in clinical settings.
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Affiliation(s)
- Garazi Gainza
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country, Vitoria, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria, Spain
| | | | - José Luis Pedraz
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country, Vitoria, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria, Spain
| | - Rosa Maria Hernandez
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country, Vitoria, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria, Spain
| | - Manoli Igartua
- NanoBioCel Group, Laboratory of Pharmaceutics, School of Pharmacy, University of the Basque Country, Vitoria, Spain; Biomedical Research Networking Centre in Bioengineering, Biomaterials and Nanomedicine (CIBER-BBN), Vitoria, Spain.
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Prajapati VD, Jani GK, Kapadia JR. Current knowledge on biodegradable microspheres in drug delivery. Expert Opin Drug Deliv 2015; 12:1283-99. [DOI: 10.1517/17425247.2015.1015985] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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17
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WANG CUIWEI, YANG SHIPING, HU HE, DU JING, LI FENGHUA. Synthesis, characterization and in vitro and in vivo investigation of C3F8-filled poly(lactic-co-glycolic acid) nanoparticles as an ultrasound contrast agent. Mol Med Rep 2014; 11:1885-90. [DOI: 10.3892/mmr.2014.2938] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2014] [Accepted: 09/29/2014] [Indexed: 11/06/2022] Open
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Feng S, Nie L, Zou P, Suo J. Effects of drug and polymer molecular weight on drug release from PLGA-mPEG microspheres. J Appl Polym Sci 2014. [DOI: 10.1002/app.41431] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Shuibin Feng
- State Key Laboratory of Mould Technology; College of Materials Science and Engineering, Huazhong University of Science and Technology (HUST); Wuhan 430074 People's Republic of China
| | - Lei Nie
- State Key Laboratory of Mould Technology; College of Materials Science and Engineering, Huazhong University of Science and Technology (HUST); Wuhan 430074 People's Republic of China
| | - Peng Zou
- State Key Laboratory of Mould Technology; College of Materials Science and Engineering, Huazhong University of Science and Technology (HUST); Wuhan 430074 People's Republic of China
| | - Jinping Suo
- State Key Laboratory of Mould Technology; College of Materials Science and Engineering, Huazhong University of Science and Technology (HUST); Wuhan 430074 People's Republic of China
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Parlato M, Johnson A, Hudalla G, Murphy W. Adaptable poly(ethylene glycol) microspheres capable of mixed-mode degradation. Acta Biomater 2013; 9:9270-80. [PMID: 23958780 DOI: 10.1016/j.actbio.2013.08.011] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2013] [Revised: 07/31/2013] [Accepted: 08/09/2013] [Indexed: 10/26/2022]
Abstract
A simple, degradable poly(ethylene glycol) (PEG) microsphere system formed from a water-in-water emulsion process is presented. Microsphere network degradation and erosion were controlled by adjusting the number of hydrolytically labile sites, by varying the PEG molecular weight, and by adjusting the emulsion conditions. Microsphere size was also controllable by adjusting the polymer formulation. Furthermore, it is demonstrated that alternative degradation and erosion mechanisms, such as proteolytic degradation, can be incorporated into PEG microspheres, resulting in mixed-mode degradation. Owing to the adaptability of this approach, it may serve as an attractive option for emerging tissue engineering, drug delivery and gene delivery applications.
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Zhang W, Wang L, Liu Y, Chen X, Li J, Yang T, An W, Ma X, Pan R, Ma G. Comparison of PLA microparticles and alum as adjuvants for H5N1 influenza split vaccine: adjuvanticity evaluation and preliminary action mode analysis. Pharm Res 2013; 31:1015-31. [PMID: 24170280 DOI: 10.1007/s11095-013-1224-z] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2013] [Accepted: 10/03/2013] [Indexed: 01/10/2023]
Abstract
PURPOSE To compare the adjuvanticity of polymeric particles (new-generation adjuvant) and alum (the traditional and FDA-approved adjuvant) for H5N1 influenza split vaccine, and to investigate respective action mode. METHODS Vaccine formulations were prepared by incubating lyophilized poly(lactic acid) (PLA) microparticles or alum within antigen solution. Antigen-specific immune responses in mice were evaluated using ELISA, ELISpot, and flow cytometry assay. Adjuvants' action modes were investigated by determining antigen persistence at injection sites, local inflammation response, antigen transport into draining lymph node, and activation of DCs in secondary lymphoid organs (SLOs). RESULTS Alum promoted antigen-specific humoral immune response. PLA microparticles augmented both humoral immune response and cell-mediated-immunity which might enhance cross-protection of influenza vaccine. With regard to action mode, alum adjuvant functions by improving antigen persistence at injection sites, inducing severe local inflammation, slightly improving antigen transport into draining lymph nodes, and improving the expression of MHC II on DCs in SLOs. PLA microparticles function by slightly improving antigen transport into draining lymph nodes, and promoting the expression of both MHC molecules and co-stimulatory molecules on DCs in SLOs. CONCLUSIONS Considering the adjuvanticity and side effects (local inflammation) of both adjuvants, we conclude that PLA microparticles are promising alternative adjuvant for H5N1 influenza split vaccine.
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Affiliation(s)
- Weifeng Zhang
- National Key Laboratory of Biochemical Engineering PLA Key Laboratory of Biopharmaceutical Production & Formulation Engineering, Institute of Process Engineering Chinese Academy of Sciences, Bei-Er-Jie No.1, Zhong-Guan-Cun, Haidian District, Beijing, 100190, People's Republic of China
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Kutikov AB, Song J. An amphiphilic degradable polymer/hydroxyapatite composite with enhanced handling characteristics promotes osteogenic gene expression in bone marrow stromal cells. Acta Biomater 2013; 9:8354-64. [PMID: 23791675 PMCID: PMC3745304 DOI: 10.1016/j.actbio.2013.06.013] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2013] [Revised: 05/31/2013] [Accepted: 06/10/2013] [Indexed: 01/13/2023]
Abstract
Electrospun polymer/hydroxyapatite (HA) composites combining biodegradability with osteoconductivity are attractive for skeletal tissue engineering applications. However, most biodegradable polymers such as poly(lactic acid) (PLA) are hydrophobic and do not blend with adequate interfacial adhesion with HA, compromising the structural homogeneity, mechanical integrity and biological performance of the composite. To overcome this challenge, we combined a hydrophilic polyethylene glycol (PEG) block with poly(d,l-lactic acid) to improve the adhesion of the degradable polymer with HA. The amphiphilic triblock copolymer PLA-PEG-PLA (PELA) improved the stability of HA-PELA suspension at 25wt.% HA content, which was readily electrospun into HA-PELA composite scaffolds with uniform fiber dimensions. HA-PELA was highly extensible (failure strain>200% vs. <40% for HA-PLA), superhydrophilic (∼0° water contact angle vs. >100° for HA-PLA), and exhibited an 8-fold storage modulus increase (unlike deterioration for HA-PLA) upon hydration, owing to the favorable interaction between HA and PEG. HA-PELA also better promoted osteochondral lineage commitment of bone marrow stromal cells in unstimulated culture and supported far more potent osteogenic gene expression upon induction than HA-PLA. We demonstrate that the chemical incorporation of PEG is an effective strategy to improve the performance of degradable polymer/HA composites for bone tissue engineering applications.
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Affiliation(s)
- Artem B. Kutikov
- Department of Orthopedics & Physical Rehabilitation, Department of Cell and Developmental Biology. University of Massachusetts Medical School, 55 Lake Ave North, Worcester, MA 01655, USA
| | - Jie Song
- Department of Orthopedics & Physical Rehabilitation, Department of Cell and Developmental Biology. University of Massachusetts Medical School, 55 Lake Ave North, Worcester, MA 01655, USA
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Scheler S. The polymer free volume as a controlling factor for drug release from poly(lactide-co-glycolide) microspheres. J Appl Polym Sci 2013. [DOI: 10.1002/app.39740] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Stefan Scheler
- Sandoz GmbH; Sandoz Development Center Austria; Austria Kundl 6250 Austria
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Jazayeri SD, Ideris A, Zakaria Z, Shameli K, Moeini H, Omar AR. Cytotoxicity and immunological responses following oral vaccination of nanoencapsulated avian influenza virus H5 DNA vaccine with green synthesis silver nanoparticles. J Control Release 2012; 161:116-23. [PMID: 22549012 DOI: 10.1016/j.jconrel.2012.04.015] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Revised: 03/14/2012] [Accepted: 04/10/2012] [Indexed: 12/11/2022]
Abstract
DNA formulations provide the basis for safe and cost effective vaccine. Low efficiency is often observed in the delivery of DNA vaccines. In order to assess a new strategy for oral DNA vaccine formulation and delivery, plasmid encoding hemagglutinin (HA) gene of avian influenza virus, A/Ck/Malaysia/5858/04 (H5N1) (pcDNA3.1/H5) was formulated using green synthesis of sliver nanoparticles (AgNP) with polyethylene glycol (PEG). AgNP were successfully synthesized uniformly dispersed with size in the range of 4 to 18 nm with an average size of 11 nm. Cytotoxicity of the prepared AgNP was investigated in vitro and in vivo using MCF-7 cells and cytokine expression, respectively. At the concentration of -5 log₁₀AgNP, no cytotoxic effects were detected in MCF-7 cells with 9.5% cell death compared to the control. One-day-old specific pathogen-free (SPF) chicks immunized once by oral gavage with 10 μl of pcDNA3.1/H5 (200 ng/ml) nanoencapsulated with 40 μl AgNP (3.7×10⁻² μg of Ag) showed no clinical manifestations. PCR successfully detect the AgNP/H5 plasmid from the duodenum of the inoculated chicken as early as 1h post-immunization. Immunization of chickens with AgNP/H5 enhanced both pro inflammatory and Th1-like expressions, although no significant differences were recorded in the chickens inoculated with AgNP, AgNP/pcDNA3.1 and the control. In addition, serum samples collected from immunized chickens with AgNP/H5 showed rapidly increasing antibody against H5 on day 14 after immunization. The highest average antibody titres were detected on day 35 post-immunization at 51.2±7.5. AgNP/H5 also elicited both CD4+ and CD8+ T cells in the immunized chickens as early as day 14 after immunization, at 7.5±2.0 and 20±1.9 percentage, respectively. Hence, single oral administrations of AgNP/H5 led to induce both the antibody and cell-mediated immune responses as well as enhanced cytokine production.
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Affiliation(s)
- Seyed Davoud Jazayeri
- Institute of Bioscience, Universiti Putra Malaysia, 43400 Serdang, Selangor, Malaysia
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24
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Niu Y, Zhang P, Zhang J, Xiao L, Yang K, Wang Y. Poly(p-dioxanone)–poly(ethylene glycol) network: synthesis, characterization, and its shape memory effect. Polym Chem 2012. [DOI: 10.1039/c2py20311a] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Lim YT, Shim SM, Noh YW, Lee KS, Choi DY, Uyama H, Bae HH, Kim JH, Hong KS, Sung MH, Poo H. Bioderived polyelectrolyte nanogels for robust antigen loading and vaccine adjuvant effects. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2011; 7:3281-3286. [PMID: 22009658 DOI: 10.1002/smll.201101836] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Indexed: 05/31/2023]
Abstract
An easy but robust strategy for the synthesis of bioderived polyelectrolyte nanogels for protein antigen loading and vaccine adjuvant systems that can improve both humoral (Th2) and cellular immunity (Th1) is presented. The synthesized polyelectrolyte nanogels promote the uptake of antigens into antigen-presenting cells and strongly induce ovalbumin-specific INF-γ producing cells, cytotoxic T cell activity, and antibody production.
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Affiliation(s)
- Yong Taik Lim
- Graduate School and Department of Analytical Science and Technology, Chungnam National University, Daejeon 305-764, South Korea
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Zhou Q, Zhang Z, Chen T, Guo X, Zhou S. Preparation and characterization of thermosensitive pluronic F127-b-poly(ɛ-caprolactone) mixed micelles. Colloids Surf B Biointerfaces 2011; 86:45-57. [PMID: 21489759 DOI: 10.1016/j.colsurfb.2011.03.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2010] [Revised: 02/28/2011] [Accepted: 03/15/2011] [Indexed: 02/04/2023]
Abstract
The mixed micelles composed of pluronic F127-b-poly(ɛ-caprolactone) (F127-CL) and bovine serum albumin (BSA) or polylactic acid (PLA) were fabricated for application as promising drug carriers. F127-CL copolymers were characterized by (1)H NMR, FT-IR, GPC, DSC, XRD and POM. They can self-assemble into micelles in water by solvent evaporation method. The thermo-responsivities of the pure and mixed micelles were investigated. The drug release behaviors were investigated in phosphate-buffered solution (PBS) and acetate buffer solution (ABS), respectively, at 37°C. The hemolysis and coagulation assay and the tumor cell growth inhibition assays were further evaluated. The morphologies of pure micelles underwent from the coexistence of the rods and spheres to the spheres with increasing the lengths of CL. The micelle behaviors were influenced with the addition of BSA and PLA. Both pure and mixed micelles of F127-CL with CL length of 200 show thermo-responsivities from 25 to 45°C, while form larger aggregations at high temperature. The hemolysis and coagulation assays showed that the micelles possess good blood compatibility. The cytotoxicity results showed that the copolymer was a safe carrier and the encapsulated doxorubicind.HCl remained its potent anti-tumor effect. The in vitro release profiles displayed a sustained release of DOX.HCl from the micelles. The block copolymers can be great potential as a nanocontainer in drug delivery systems.
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Affiliation(s)
- Qi Zhou
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China
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27
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Biodegradable Polymeric Assemblies for Biomedical Materials. POLYMERS IN NANOMEDICINE 2011. [DOI: 10.1007/12_2011_160] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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28
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Sun L, Huang C, Gong T, Zhou S. A biocompatible approach to surface modification: Biodegradable polymer functionalized super-paramagnetic iron oxide nanoparticles. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2010. [DOI: 10.1016/j.msec.2010.02.009] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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29
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Xu B, Dou H, Tao K, Sun K, Lu R, Shi W. Influence of experimental parameters and the copolymer structure on the size control of nanospheres in double emulsion method. JOURNAL OF POLYMER RESEARCH 2010. [DOI: 10.1007/s10965-010-9399-z] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Zhao K, Li GX, Jin YY, Wei HX, Sun QS, Huang TT, Wang YF, Tong GZ. Preparation and immunological effectiveness of a Swine influenza DNA vaccine encapsulated in PLGA microspheres. J Microencapsul 2010; 27:178-86. [DOI: 10.3109/02652040903059239] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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31
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Balasubramanian V, Onaca O, Enea R, Hughes DW, Palivan CG. Protein delivery: from conventional drug delivery carriers to polymeric nanoreactors. Expert Opin Drug Deliv 2009; 7:63-78. [DOI: 10.1517/17425240903394520] [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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32
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Yun J, Kim HI. Preparation of poly(vinyl alcohol)/poly(acrylic acid) microcapsules and microspheres and their pH-responsive release behavior. J IND ENG CHEM 2009. [DOI: 10.1016/j.jiec.2009.09.021] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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33
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Sun L, Zhou S, Wang W, Su Q, Li X, Weng J. Preparation and characterization of protein-loaded polyanhydride microspheres. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2009; 20:2035-2042. [PMID: 19424777 DOI: 10.1007/s10856-009-3765-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/04/2008] [Accepted: 04/24/2009] [Indexed: 05/27/2023]
Abstract
Poly(1,3-bis-(p-carboxyphenoxy propane)-co-(sebacic anhydride) (P(CPP-SA)) have the anhydride bonds in copolymer backbone, which are available for degradation on the base of passive hydrolysis. This chemical structure made it degraded within a short time in linear degradation rate. For this property, polyanhydrides are one of the most suitable biodegradable polymers employed as drug carriers. This paper aimed at researching the erosion and degradation of P(CPP-SA) microspheres with CPP/SA monomer ratios of 20:80, 35:65 and 50:50. In vitro protein release from the microspheres was also investigated in this paper. Human serum albumin (HSA) was used as the model protein. In this research, the microspheres degradation and drug release rate from microspheres can be adjusted by altering the CPP/SA ratios of P(CPP-SA). The features of surface erosion were observed in SEM. The structural integrity of HSA extracted from microspheres was detected by gel permeation chromatography, compared with native HSA. The results showed HSA remained its molecule weight after encapsulated.
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Affiliation(s)
- Lin Sun
- Key Laboratory of Advanced Technologies of Materials, Ministry of Education, School of Materials Science and Engineering, Southwest Jiaotong University, 610031 Chengdu, People's Republic of China
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34
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Leung BO, Hitchcock AP, Cornelius R, Brash JL, Scholl A, Doran A. X-ray Spectromicroscopy Study of Protein Adsorption to a Polystyrene−Polylactide Blend. Biomacromolecules 2009; 10:1838-45. [DOI: 10.1021/bm900264w] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Bonnie O. Leung
- BIMR and School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1, and Advanced Light Source, Berkeley Lab, Berkeley, California 94720
| | - Adam P. Hitchcock
- BIMR and School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1, and Advanced Light Source, Berkeley Lab, Berkeley, California 94720
| | - Rena Cornelius
- BIMR and School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1, and Advanced Light Source, Berkeley Lab, Berkeley, California 94720
| | - John L. Brash
- BIMR and School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1, and Advanced Light Source, Berkeley Lab, Berkeley, California 94720
| | - Andreas Scholl
- BIMR and School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1, and Advanced Light Source, Berkeley Lab, Berkeley, California 94720
| | - Andrew Doran
- BIMR and School of Biomedical Engineering, McMaster University, Hamilton, Ontario, Canada L8S 4M1, and Advanced Light Source, Berkeley Lab, Berkeley, California 94720
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McCullough KC, Summerfield A. Targeting the porcine immune system--particulate vaccines in the 21st century. DEVELOPMENTAL AND COMPARATIVE IMMUNOLOGY 2009; 33:394-409. [PMID: 18771683 PMCID: PMC7103233 DOI: 10.1016/j.dci.2008.07.015] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/19/2008] [Revised: 07/11/2008] [Accepted: 07/11/2008] [Indexed: 05/15/2023]
Abstract
During the last decade, the propagation of immunological knowledge describing the critical role of dendritic cells (DC) in the induction of efficacious immune responses has promoted research and development of vaccines systematically targeting DC. Based on the promise for the rational design of vaccine platforms, the current review will provide an update on particle-based vaccines of both viral and synthetic origin, giving examples of recombinant virus carriers such as adenoviruses and biodegradable particulate carriers. The viral carriers carry pathogen-associated molecular patterns (PAMP), used by the original virus for targeting DC, and are particularly efficient and versatile gene delivery vectors. Efforts in the field of synthetic vaccine carriers are focussing on decorating the particle surface with ligands for DC receptors such as heparan sulphate glycosaminoglycan structures, integrins, Siglecs, galectins, C-type lectins and toll-like receptors. The emphasis of this review will be placed on targeting the porcine immune system, but reference will be made to advances with murine and human vaccine delivery systems where information on DC targeting is available.
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Affiliation(s)
- Kenneth C McCullough
- Institute of Virology and Immunoprophylaxis, Sensemattstrasse 293, CH-3147 Mittelhäusern, Switzerland.
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36
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Wattendorf U, Merkle HP. PEGylation as a tool for the biomedical engineering of surface modified microparticles. J Pharm Sci 2009; 97:4655-69. [PMID: 18306270 DOI: 10.1002/jps.21350] [Citation(s) in RCA: 155] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Microparticles are of considerable interest for drug delivery, vaccination and diagnostic imaging. In order to obtain microparticles with long circulation times, or to provide the prerequisite for tissue specific targeting through decoration with suitable ligands, their surfaces need to be modified such that they become repellent to the adsorption of opsonic proteins and resistant to unspecific phagocytosis. The currently most considered strategy relies on the immobilisation of a poly(ethylene glycol) (PEG) corona onto the microparticles' surface. In the first chapter of this review, we discuss the unique physicochemical properties of PEG, which make it the polymer of choice to render the surfaces of microparticles repellent to the adsorption of proteins and resistant to cellular recognition. Furthermore, we present various technologies for the preparation of microparticles with PEGylated surfaces. Another aspect is the decoration of the PEGylated surfaces with suitable ligands for cell specific recognition and targeting. Finally, we review miscellaneous applications of PEGylated microparticles, mainly focusing on the fields of drug delivery, targeting and vaccination. Although still in its infancy, the PEGylation of microparticles holds promise towards future biomedical applications.
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Affiliation(s)
- Uta Wattendorf
- Institute of Pharmaceutical Sciences, ETH Zurich, 8093 Zurich, Switzerland
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37
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Hamidi M, Zarei N, Zarrin A, Mohammadi-Samani S. Preparation and Validation of Carrier Human Erythrocytes Loaded by Bovine Serum Albumin as a Model Antigen/Protein. Drug Deliv 2008; 14:295-300. [PMID: 17613017 DOI: 10.1080/10717540701203000] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
Erythrocytes as the most readily available and abundant cells within the body have been studied extensively for their potential application as drug delivery carries. In this study, human erythrocytes were loaded by bovine serum albumin (BSA) as a model antigen/protein using hypotonic preswelling method for targeted delivery of this antigen-to antigen-presenting cells. The average loaded amount, efficiency of entrapment, and cell recovery upon loading procedure were 1979.25 +/- 9.4 microg, 30.06 +/- 0.20%, and 87.53 +/- 0.66%, respectively. The total BSA recovery upon loading procedure was 97.20 +/- 4.90%. The apparent mechanism of entrapment was simple concentration-based gradient in/out the cells with some minor limiting factors against protein entry into the cells. We have shown that the intra- and intersubject variations of the method were interestingly low (i.e., less than 5% in all cases).
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Affiliation(s)
- Mehrdad Hamidi
- Department of Pharmaceutics, Faculty of Pharmacy, Shiraz University of Medical Sciences, Shiraz, Iran.
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38
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In vitro degradation and release profiles for electrospun polymeric fibers containing paracetanol. Colloids Surf B Biointerfaces 2008; 66:206-12. [DOI: 10.1016/j.colsurfb.2008.06.021] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2008] [Revised: 05/19/2008] [Accepted: 06/20/2008] [Indexed: 11/20/2022]
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39
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Wei Q, Wei W, Tian R, Wang LY, Su ZG, Ma GH. Preparation of uniform-sized PELA microspheres with high encapsulation efficiency of antigen by premix membrane emulsification. J Colloid Interface Sci 2008; 323:267-73. [DOI: 10.1016/j.jcis.2008.04.058] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2008] [Revised: 04/17/2008] [Accepted: 04/19/2008] [Indexed: 11/28/2022]
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Zhang Z, Lee SH, Gan CW, Feng SS. In Vitro and In Vivo Investigation on PLA–TPGS Nanoparticles for Controlled and Sustained Small Molecule Chemotherapy. Pharm Res 2008; 25:1925-35. [DOI: 10.1007/s11095-008-9611-6] [Citation(s) in RCA: 92] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2008] [Accepted: 04/25/2008] [Indexed: 11/29/2022]
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41
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Ainslie KM, Tao SL, Popat KC, Desai TA. In vitro immunogenicity of silicon-based micro- and nanostructured surfaces. ACS NANO 2008; 2:1076-1084. [PMID: 19206506 DOI: 10.1021/nn800071k] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
The increasing use of micro- and nanostructured silicon-based devices for in vivo therapeutic or sensing applications highlights the importance of understanding the immunogenicity of these surfaces. Four silicon surfaces (nanoporous, microstructured, nanochanneled, and flat) were studied for their ability to provoke an immune response in human blood derived monocytes. The monocytes were incubated with the surfaces for 48 h and the immunogenicity was evaluated based on the viability, shape factors, and cytokine expression. Free radical oxygen formation was measured at 18 h to elicit a possible mechanism invoking immunogenicity. Although no cytokines were significantly different comparing the response of monocytes on the tissue culture polystyrene surfaces to those on the micropeaked surfaces, on average all cytokines were elevated on the micropeaked surface. The monocytes on the nanoporous surface also displayed an elevated cytokine response, overall, but not to the degree of those on the micropeaked surface. The nanochanneled surface response was similar to that of flat silicon. Overall, the immunogenicity and biocompatibility of flat, nanochanneled, and nanoporous silicon toward human monocytes are approximately equivalent to tissue culture polystyrene.
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Affiliation(s)
- Kristy M Ainslie
- Department of Bioengineering and Therapeutic Sciences, University of California, San Francisco, San Francisco, California 94158, USA
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42
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Xu Q, Czernuszka JT. Controlled release of amoxicillin from hydroxyapatite-coated poly(lactic-co-glycolic acid) microspheres. J Control Release 2008; 127:146-53. [DOI: 10.1016/j.jconrel.2008.01.017] [Citation(s) in RCA: 86] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2007] [Revised: 01/18/2008] [Accepted: 01/26/2008] [Indexed: 11/28/2022]
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43
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Giteau A, Venier-Julienne M, Aubert-Pouëssel A, Benoit J. How to achieve sustained and complete protein release from PLGA-based microparticles? Int J Pharm 2008; 350:14-26. [DOI: 10.1016/j.ijpharm.2007.11.012] [Citation(s) in RCA: 192] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2007] [Revised: 11/06/2007] [Accepted: 11/08/2007] [Indexed: 10/22/2022]
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Ebensen T, Link C, Riese P, Schulze K, Morr M, Guzmán CA. A pegylated derivative of alpha-galactosylceramide exhibits improved biological properties. THE JOURNAL OF IMMUNOLOGY 2007; 179:2065-73. [PMID: 17675464 DOI: 10.4049/jimmunol.179.4.2065] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The glycolipid alpha-galactosylceramide (alphaGalCer) has immunomodulatory properties, which have been exploited to combat cancer, chronic inflammatory diseases, and infections. However, its poor solubility makes alphaGalCer a suboptimal compound for in vivo applications. In this study, a pegylated derivative of alphaGalCer is characterized, which exhibits improved physical and biological properties. The new compound, alphaGalCerMPEG, is water-soluble and retains the specificity for the CD1d receptor of alphaGalCer. The in vitro stimulatory properties on immune cells (e.g., dendritic cells and splenocytes) are maintained intact, even when tested at a 33-fold lower concentration of the active moiety than alphaGalCer. NK cells isolated from mice treated with alphaGalCerMPEG also had stronger cytotoxic activity on YAC-1 cells than those obtained from animals receiving either alphaGalCer or CpG. Intranasal immunization studies performed in mice showed that alphaGalCerMPEG exerts stronger adjuvant activities than the parental compound alphaGalCer when tested at 0.35 vs 11.7 nM/dose. Coadministration of beta-galactosidase with alphaGalCerMPEG resulted not only in high titers of Ag-specific Abs in serum (i.e., 1:512,000), but also in the stimulation of stronger Th2 and secretory IgA responses, both at local and remote mucosal effector sites (i.e., nose, lung, and vagina). The new synthetic derivative alphaGalCerMPEG represents a promising tool for the development of immune interventions against infectious and noninfectious diseases.
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Affiliation(s)
- Thomas Ebensen
- Department of Vaccinology, Helmholtz Centre for Infection Research, Braunschweig, Germany
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46
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Ben-Shabat S, Kumar N, Domb AJ. PEG-PLA block copolymer as potential drug carrier: preparation and characterization. Macromol Biosci 2007; 6:1019-25. [PMID: 17128420 DOI: 10.1002/mabi.200600165] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Diblock and multiblock copolymers composed of a poly(D,L-lactide) (PLA) or poly(trimethylene carbonate) (PTMC) core with a hydrophilic chain of poly(ethylene glycol) (PEG) were prepared. These copolymers, in which the core is connected to PEG through a polyfunctional molecule such as citric, mucic, or tartaric acid, may be used to form nanoparticles for drug delivery applications. Branched copolymers were prepared by direct amidation between the polyfunctional acid and methoxy PEGamine, followed by ring-opening polymerization of lactide or trimethyl carbonate to form the PLA and PTMC block copolymers. In addition, a complex multiblock copolymer of biotin-PEG-poly[lactic-co-(glycolic acid)] (PLGA) for application in an avidin-biotin system was prepared for possible design of nanospheres with targeting properties. Studies of drug release from polymeric systems containing multiblock copolymers and studies of polymer degradation were also performed.
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Affiliation(s)
- Shimon Ben-Shabat
- Department of Pharmacology and School of Pharmacy, Faculty of Health Sciences, Ben Gurion University of the Negev, P.O. Box 653, Beer Sheva 84105, Israel
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Lee SH, Zhang Z, Feng SS. Nanoparticles of poly(lactide)-tocopheryl polyethylene glycol succinate (PLA-TPGS) copolymers for protein drug delivery. Biomaterials 2007; 28:2041-50. [PMID: 17250886 DOI: 10.1016/j.biomaterials.2007.01.003] [Citation(s) in RCA: 75] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2006] [Accepted: 01/01/2007] [Indexed: 10/23/2022]
Abstract
Nanoparticles (NPs) of poly(lactide)-tocopheryl polyethylene glycol succinate (PLA-TPGS) copolymers with various PLA:TPGS component ratios were prepared by the double emulsion technique for protein drug formulation with bovine serum albumin (BSA) as a model protein. Influence of the PLA:TPGS component ratio and the BSA loading level on the drug encapsulation efficiency (EE) and in vitro drug release behavior was investigated. The PLA-TPGS NPs achieved 16.7% protein drug loading and 75.6% EE, which exhibited a biphasic pattern of controlled protein release with higher initial burst for those NPs of more TPGS content. Furthermore, the released proteins retained good structural integrity for at least 35 days at 37 degrees C as indicated by sodium dodecyl sulfate-polyacrylamide gel electrophoresis (SDS-PAGE) and circular dichroism (CD) spectroscopy. Compared with other biodegradable polymeric NPs such as poly(D,L-lactide-co-glycolide) (PLGA) NPs, PLA-TPGS NPs could provide the encapsulated proteins a milder environment. Confocal laser scanning microscopy (CLSM) observation demonstrated the intracellular uptake of the PLA-TPGS NPs by NIH-3T3 fibroblast cells and Caco-2 cancer cells. This research suggests that PLA-TPGS NPs could be of great potential for clinical formulation of proteins and peptides.
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Affiliation(s)
- Sie Huey Lee
- NUS Nanoscience & Nanotechnology Initiative (NUSNNI), National University of Singapore, Block E5, #02-11, 4 Engineering Drive 4, Singapore 117576, Singapore
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Hamidi M, Zarei N, Zarrin AH, Mohammadi-Samani S. Preparation and in vitro characterization of carrier erythrocytes for vaccine delivery. Int J Pharm 2007; 338:70-8. [PMID: 17317049 DOI: 10.1016/j.ijpharm.2007.01.025] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/03/2006] [Revised: 01/11/2007] [Accepted: 01/16/2007] [Indexed: 10/23/2022]
Abstract
Erythrocytes as the most readily available and abundant cells within the body, have been studied extensively for their potential application as drug delivery carriers. In this study, human erythrocytes have been loaded by bovine serum albumin (BSA) as a model antigen/protein using hypotonic preswelling method for targeted delivery of this antigen to antigen-presenting cells (APCs). A series of in vitro tests have been carried out to characterize the carrier cells in vitro, including loading parameters, BSA and hemoglobin release kinetics, hematological indices, particle size distribution, SEM analysis, osmotic and turbulence fragility, and osmotic competency. BSA was loaded in erythrocytes with a loaded amount of 1.98+/-0.009mg with antigen release from carrier cells showing a zero-order kinetic consistent to that of the cell lysis. The apparent cell sizes, measured using laser scattering, were not significantly different from normal erythrocytes, but the real sizes, measured using SEM, and surface topologies were quite different between loaded and unloaded cells. The BSA-loaded cells were remarkably more fragile and less deformable compared to the normal cells. Totally, BSA-loaded erythrocytes seem to be a promising delivery system for reticuloendothelial system (RES) targeting of the antigens.
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Affiliation(s)
- M Hamidi
- Department of Pharmaceutics, Faculty of Pharmacy, Shiraz University of Medical Sciences, P.O. Box 71345-1583 Shiraz, Iran.
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Saupe A, McBurney W, Rades T, Hook S. Immunostimulatory colloidal delivery systems for cancer vaccines. Expert Opin Drug Deliv 2006; 3:345-54. [PMID: 16640495 DOI: 10.1517/17425247.3.3.345] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Cancer vaccine delivery is a multidisciplinary scientific field that is currently undergoing rapid development. An important component of cancer vaccines is the development of novel vaccine delivery strategies, such as colloidal immunostimulatory delivery systems. The importance of formulation strategies for cancer vaccines can be explained by the poor immunogenicity of tumour antigens. Colloidal vaccine delivery systems modify the kinetics, body distribution, uptake and release of the vaccine. This review explores recent research that is directed towards more targeted treatments of cancer through to colloidal vaccine delivery systems. Widely investigated carrier systems include polymeric micro- and nanoparticles, liposomes, archaeal lipid liposomes (archaeosomes), immune-stimulating complexes and virus-like particles. These systems are evaluated in terms of their formulation techniques, immunological mechanisms of action as well as the potential and limitations of such colloidal systems in the field of cancer vaccines.
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Affiliation(s)
- Anne Saupe
- School of Pharmacy, University of Otago, PO Box 913, Dunedin, New Zealand.
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Joseph A, Itskovitz-Cooper N, Samira S, Flasterstein O, Eliyahu H, Simberg D, Goldwaser I, Barenholz Y, Kedar E. A new intranasal influenza vaccine based on a novel polycationic lipid—ceramide carbamoyl-spermine (CCS). Vaccine 2006; 24:3990-4006. [PMID: 16516356 DOI: 10.1016/j.vaccine.2005.12.017] [Citation(s) in RCA: 70] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2005] [Accepted: 12/07/2005] [Indexed: 11/17/2022]
Abstract
Although most pathogens use the mucosal routes for invasion, the majority of currently available vaccines are administered parenterally. Injectable vaccines induce good systemic immunity but often unsatisfactory mucosal immunity. A non-injectable mucosal vaccine, which can be self-administered intranasally, may provide both effective systemic and mucosal immunity and can be used for vaccination of large populations within a short period of time in case of a sudden epidemic. Here, we report on a new intranasal (i.n.) influenza vaccine, based on a novel polycationic sphingolipid, N-palmitoyl D-erythro-sphingosyl carbamoyl-spermine (ceramide carbamoyl-spermine = CCS), having combined carrier and adjuvant activities, which elicits, in mice, strong systemic (serum) and local (lung and nasal) humoral and cellular responses, and provides protective immunity. In a comparative study, we show that both unmodified commercial vaccine and vaccine formulated with neutral or anionic liposomes were poorly immunogenic upon i.n. administration. Of five vaccine formulations based on well-established monocationic lipids in the form of unsized liposomes, three (DC-Chol, DDAB, and DSTAP-based) resulted in low serum and local responses, while two others (DMTAP and DOTAP-based vaccines) induced both systemic and local vigorous Th1+Th2 immune responses. However, only the vaccine formulated with CCS was equivalent or superior to the commercial vaccine co-administered with cholera toxin as an adjuvant. Furthermore, the CCS-based influenza vaccine was highly efficacious following a single or a repeated (x2) i.n. or a single i.m. administration, without an added adjuvant, in both young (2 months) and old (18 months) mice. It elicited high titers of strain cross-reactive hemagglutination inhibition (HI) antibodies, and the high antibody titers and protective immunity persisted for at least 9 months. No systemic adverse effects, and only a mild local inflammatory response, were observed in mice and rabbits vaccinated i.n. with the CCS vaccine formulation. A similar approach may prove efficacious for i.n. vaccination against other pathogens.
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Affiliation(s)
- Aviva Joseph
- The Lautenberg Center for General and Tumor Immunology, The Hebrew University-Hadassah Medical School, P.O. Box 12272, Jerusalem 91120, Israel
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