651
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Iyer AK, Singh A, Ganta S, Amiji MM. Role of integrated cancer nanomedicine in overcoming drug resistance. Adv Drug Deliv Rev 2013; 65:1784-802. [PMID: 23880506 DOI: 10.1016/j.addr.2013.07.012] [Citation(s) in RCA: 233] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2013] [Revised: 06/19/2013] [Accepted: 07/15/2013] [Indexed: 12/18/2022]
Abstract
Cancer remains a major killer of mankind. Failure of conventional chemotherapy has resulted in recurrence and development of virulent multi drug resistant (MDR) phenotypes adding to the complexity and diversity of this deadly disease. Apart from displaying classical physiological abnormalities and aberrant blood flow behavior, MDR cancers exhibit several distinctive features such as higher apoptotic threshold, aerobic glycolysis, regions of hypoxia, and elevated activity of drug-efflux transporters. MDR transporters play a pivotal role in protecting the cancer stem cells (CSCs) from chemotherapy. It is speculated that CSCs are instrumental in reviving tumors after the chemo and radiotherapy. In this regard, multifunctional nanoparticles that can integrate various key components such as drugs, genes, imaging agents and targeting ligands using unique delivery platforms would be more efficient in treating MDR cancers. This review presents some of the important principles involved in development of MDR and novel methods of treating cancers using multifunctional-targeted nanoparticles. Illustrative examples of nanoparticles engineered for drug/gene combination delivery and stimuli responsive nanoparticle systems for cancer therapy are also discussed.
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652
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Wever D, Riemsma E, Picchioni F, Broekhuis A. Comb-like thermoresponsive polymeric materials: Synthesis and effect of macromolecular structure on solution properties. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.07.039] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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653
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Yu YC, Li G, Kim J, Youk JH. One-pot synthesis of poly(N-vinylcaprolactam)-based biocompatible block copolymers using a dual initiator for ROP and RAFT polymerization. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.09.013] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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654
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Saikia BJ, Das D, Boruah M, Dolui SK. Synthesis and fluorescence properties of star-shaped polymers carrying two fluorescent moieties. POLYM INT 2013. [DOI: 10.1002/pi.4609] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
| | - Dhaneswar Das
- Dept of chemical Sciences; Tezpur University; Napaam-784028
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655
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Kelley EG, Albert JNL, Sullivan MO, Epps TH. Stimuli-responsive copolymer solution and surface assemblies for biomedical applications. Chem Soc Rev 2013; 42:7057-71. [PMID: 23403471 PMCID: PMC3703495 DOI: 10.1039/c3cs35512h] [Citation(s) in RCA: 248] [Impact Index Per Article: 22.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Stimuli-responsive polymeric materials is one of the fastest growing fields of the 21st century, with the annual number of papers published more than quadrupling in the last ten years. The responsiveness of polymer solution assemblies and surfaces to biological stimuli (e.g. pH, reduction-oxidation, enzymes, glucose) and externally applied triggers (e.g. temperature, light, solvent quality) shows particular promise for various biomedical applications including drug delivery, tissue engineering, medical diagnostics, and bioseparations. Furthermore, the integration of copolymer architectures into stimuli-responsive materials design enables exquisite control over the locations of responsive sites within self-assembled nanostructures. The combination of new synthesis techniques and well-defined copolymer self-assembly has facilitated substantial developments in stimuli-responsive materials in recent years. In this tutorial review, we discuss several methods that have been employed to synthesize self-assembling and stimuli-responsive copolymers for biomedical applications, and we identify common themes in the response mechanisms among the targeted stimuli. Additionally, we highlight parallels between the chemistries used for generating solution assemblies and those employed for creating copolymer surfaces.
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Affiliation(s)
- Elizabeth G. Kelley
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA. Tel: +1 302 831 0215; Fax: +1 302 831 1048
| | - Julie N. L. Albert
- Department of Chemical and Biomolecular Engineering, North Carolina State University, Raleigh, NC 27695, USA
| | - Millicent O. Sullivan
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA. Tel: +1 302 831 0215; Fax: +1 302 831 1048
| | - Thomas H. Epps
- Department of Chemical and Biomolecular Engineering, University of Delaware, Newark, DE 19716, USA. Tel: +1 302 831 0215; Fax: +1 302 831 1048
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656
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pH- and temperature-responsive poly(aspartic acid)-l-poly(N-isopropylacrylamide) conetwork hydrogel. Eur Polym J 2013. [DOI: 10.1016/j.eurpolymj.2013.02.015] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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657
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Maeng JH, So JW, Kim J, Kim IA, Jung JH, Min K, Lee DH, Yang SG. rhEGF-containing thermosensitive and mucoadhesive polymeric sol–gel for endoscopic treatment of gastric ulcer and bleeding. J Biomater Appl 2013; 28:1113-21. [DOI: 10.1177/0885328213499948] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Gastrointestinal endoscopy is a standard diagnostic tool for gastrointestinal ulcers and cancer. In this study, we have developed recombinant human epidermal growth factor-containing ulcer-coating polymeric sol–gel for endoscopic application. Chitosan and pluronic F127 were employed for their thermoresponsive and bioadhesive properties. At temperatures below 21℃, polymeric sol–gel remains liquid during endoscopic application and transforms to gel at body temperature after application on ulcers. In an in vitro cellular wounding assay, recombinant human epidermal growth factor sol–gel significantly enhanced the cell migration and decreased the wounding area (68%) compared to nontreated, recombinant human epidermal growth factor solution, and sol–gel without recombinant human epidermal growth factor (42, 49, and 32 % decreased at day 1). The in vivo ulcer-healing study was performed in an acetic acid-induced gastric ulcer rat model and proved that our recombinant human epidermal growth factor endoscopic sol–gel facilitated the ulcer-healing process more efficiently than the other treatments. Ulcer sizes in the recombinant human epidermal growth factor sol–gel group were decreased 2.9- and 2.1-fold compared with those in the nontreated group on days 1 and 3 after ulceration, respectively. The mucosal thickness in the recombinant human epidermal growth factor sol–gel group was significantly increased compared to that in the nontreated group (3.2- and 6.9-fold on days 1 and 3 after ulceration, respectively). In a gastric retention study, recombinant human epidermal growth factor sol–gel stayed on the gastric mucosa more than 2 h after application. The present study suggests that recombinant human epidermal growth factor sol–gel is a prospective candidate for treating gastric ulcers via endoscopic application.
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Affiliation(s)
- Jin Hee Maeng
- Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, Korea
| | - Jung Won So
- CG Bio Research Institute, Sungnam, Republic of Korea
| | - Jungju Kim
- CG Bio Research Institute, Sungnam, Republic of Korea
| | - In Ae Kim
- Life Science Research Institute, Daewoong Pharmaceutical Co., Ltd., Yongin, Korea
| | - Ji Hoon Jung
- Life Science Research Institute, Daewoong Pharmaceutical Co., Ltd., Yongin, Korea
| | - Kyunghyun Min
- Life Science Research Institute, Daewoong Pharmaceutical Co., Ltd., Yongin, Korea
| | - Don Haeng Lee
- Utah-Inha DDS and Advanced Therapeutics Research Center, Incheon, Korea
- Division of Gastroenterology and Hepatology, Department of Internal Medicine, Inha University Hospital, Incheon, Korea
- Department of new drug development and NCEED, School of Medicine, Inha University, Incheon, Korea
| | - Su-Geun Yang
- Department of new drug development and NCEED, School of Medicine, Inha University, Incheon, Korea
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658
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Zhu Y, Quek JY, Lowe AB, Roth PJ. Thermoresponsive (Co)polymers through Postpolymerization Modification of Poly(2-vinyl-4,4-dimethylazlactone). Macromolecules 2013. [DOI: 10.1021/ma401096r] [Citation(s) in RCA: 43] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Yicheng Zhu
- Centre for
Advanced Macromolecular Design (CAMD), School
of Chemical Engineering, University of New South Wales, UNSW Sydney NSW 2052, Australia
| | - Jing Yang Quek
- Centre for
Advanced Macromolecular Design (CAMD), School
of Chemical Engineering, University of New South Wales, UNSW Sydney NSW 2052, Australia
| | - Andrew B. Lowe
- Centre for
Advanced Macromolecular Design (CAMD), School
of Chemical Engineering, University of New South Wales, UNSW Sydney NSW 2052, Australia
| | - Peter J. Roth
- Centre for
Advanced Macromolecular Design (CAMD), School
of Chemical Engineering, University of New South Wales, UNSW Sydney NSW 2052, Australia
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659
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Serrano-Ruiz D, Alonso-Cristobal P, Laurenti M, Frick B, López-Cabarcos E, Rubio-Retama J. Influence of the inter-chain hydrogen bonds on the thermoresponsive swelling behavior of UCST-like microgels. POLYMER 2013. [DOI: 10.1016/j.polymer.2013.06.057] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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660
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Affiliation(s)
- Stéphanie Deshayes
- Department of Bioengineering; University of California; Los Angeles California 90095
| | - Andrea M. Kasko
- Department of Bioengineering; University of California; Los Angeles California 90095
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661
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Hao J, Cheng Y, Ranatunga RJKU, Senevirathne S, Biewer MC, Nielsen SO, Wang Q, Stefan MC. A Combined Experimental and Computational Study of the Substituent Effect on Micellar Behavior of γ-Substituted Thermoresponsive Amphiphilic Poly(ε-caprolactone)s. Macromolecules 2013. [DOI: 10.1021/ma400855z] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
Affiliation(s)
- Jing Hao
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas 75080,
United States
| | - Yixing Cheng
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United
States
| | | | - Suchithra Senevirathne
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas 75080,
United States
| | - Michael C. Biewer
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas 75080,
United States
| | - Steven O. Nielsen
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas 75080,
United States
| | - Qian Wang
- Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South Carolina 29208, United
States
| | - Mihaela C. Stefan
- Department of Chemistry, University of Texas at Dallas, Richardson, Texas 75080,
United States
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662
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Bashari A, Hemmatinejad N, Pourjavadi A. Surface modification of cotton fabric with dual-responsive PNIPAAm/chitosan nano hydrogel. POLYM ADVAN TECHNOL 2013. [DOI: 10.1002/pat.3145] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- A. Bashari
- Textile Engineering Department; Amirkabir University of Technology; Hafez Avenue Tehran Iran
| | - N. Hemmatinejad
- Textile Engineering Department; Amirkabir University of Technology; Hafez Avenue Tehran Iran
| | - A. Pourjavadi
- Polymer Research Laboratory, Department of Chemistry; Sharif University of Technology; Azadi Avenue Tehran Iran
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663
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Fitzpatrick SD, Fitzpatrick LE, Thakur A, Mazumder MAJ, Sheardown H. Temperature-sensitive polymers for drug delivery. Expert Rev Med Devices 2013; 9:339-51. [PMID: 22905838 DOI: 10.1586/erd.12.24] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
Abstract
The ability to undergo rapid changes in response to subtle environmental cues make stimuli- responsive materials attractive candidates for minimally invasive, targeted and personalized drug delivery applications. This special report aims to highlight and provide a brief description of several of the significant natural and synthetic temperature-responsive materials that have clinical relevance for drug delivery applications. This report examines the advantages and disadvantages of natural versus synthetic materials and outlines various scaffold architectures that can be utilized with temperature-sensitive drug delivery materials. The authors provide a commentary on the current state of the field and provide their insight into future expectations for temperature-sensitive drug delivery, emphasizing the importance of the emergence of dual and multiresponsive systems capable of responding precisely to an expanding set of stimuli, thereby allowing the development of disease-specific drug delivery vehicles.
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Affiliation(s)
- Scott D Fitzpatrick
- School of Biomedical Engineering, McMaster University, 1280 Main Street West, Hamilton, ON, L8S 4L7, Canada
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664
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Krasia-Christoforou T, Georgiou TK. Polymeric theranostics: using polymer-based systems for simultaneous imaging and therapy. J Mater Chem B 2013; 1:3002-3025. [PMID: 32261003 DOI: 10.1039/c3tb20191k] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Polymer-based nanomedicine is a large and fast growing field. Polymer-based systems have been extensively used as therapeutic carriers as well as bioimaging agents for example in tumour diagnosis. However, fewer polymeric systems have been able to combine both therapy and imaging in a new field that is called theranostics (theragnostics). This review aims to summarise the recent developments and trends on polymeric theranostics. Four different types of therapies/treatments are examined namely drug delivery, gene delivery, photodynamic therapy and hyperthermia treatment combined with different imaging moieties like magnetic resonance imaging agents, fluorescent agents and microbubbles for ultrasound imaging.
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Affiliation(s)
- Theodora Krasia-Christoforou
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus.
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665
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Ta T, Porter TM. Thermosensitive liposomes for localized delivery and triggered release of chemotherapy. J Control Release 2013; 169:112-25. [PMID: 23583706 DOI: 10.1016/j.jconrel.2013.03.036] [Citation(s) in RCA: 230] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2012] [Revised: 03/29/2013] [Accepted: 03/30/2013] [Indexed: 01/07/2023]
Abstract
Liposomes are a promising class of nanomedicine with the potential to provide site-specific chemotherapy, thus improving the quality of cancer patient care. First-generation liposomes have emerged as one of the first nanomedicines used clinically for localized delivery of chemotherapy. Second-generation liposomes, i.e. stimuli-responsive liposomes, have the potential to not only provide site-specific chemotherapy, but also triggered drug release and thus greater spatial and temporal control of therapy. Temperature-sensitive liposomes are an especially attractive option, as tumors can be heated in a controlled and predictable manner with external energy sources. Traditional thermosensitive liposomes are composed of lipids that undergo a gel-to-liquid phase transition at several degrees above physiological temperature. More recently, temperature-sensitization of liposomes has been demonstrated with the use of lysolipids and synthetic temperature-sensitive polymers. The design, drug release behavior, and clinical potential of various temperature-sensitive liposomes, as well as the various heating modalities used to trigger release, are discussed in this review.
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Affiliation(s)
- Terence Ta
- Department of Biomedical Engineering, Boston University, 44 Cummington St., Room 403, Boston, USA.
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666
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Thermoresponsive gels based on ABA triblock copolymers: Does the asymmetry matter? ACTA ACUST UNITED AC 2013. [DOI: 10.1002/pola.26674] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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667
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Kostova B, Ivanova-Mileva K, Rachev D, Christova D. Study of the potential of amphiphilic conetworks based on poly(2-ethyl-2-oxazoline) as new platforms for delivery of drugs with limited solubility. AAPS PharmSciTech 2013; 14:352-9. [PMID: 23325383 DOI: 10.1208/s12249-013-9923-7] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2012] [Accepted: 01/07/2013] [Indexed: 12/30/2022] Open
Abstract
Thermoresponsive amphiphilic conetworks comprising poly(2-ethyl-2-oxazoline) (PEtOx), 2-hydroxyethyl methacrylate, and 2-hydroxypropyl acrylate segments have been studied as new platforms for delivery of drug with limited solubility. Series of conetworks of varied composition were synthesized and swelling kinetics in aqueous media and ethanol were followed. The platforms were loaded with the hydrophobic drug ibuprofen by swelling in its ethanol solution. The structure and properties of the drug carriers were investigated by scanning electron microscopy and differential scanning calorimetry. The release kinetics profiles of ibuprofen from the studied platform were established. The investigation proved the feasibility of the PEtOx-based amphiphilic conetworks as highly effective platforms for sustained ibuprofen delivery.
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668
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Han X, Zhang X, Yin Q, Hu J, Liu H, Hu Y. Thermoresponsive Diblock Copolymer with Tunable Soluble-Insoluble and Soluble-Insoluble-Soluble Transitions. Macromol Rapid Commun 2013; 34:574-80. [DOI: 10.1002/marc.201200785] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2012] [Revised: 12/28/2012] [Indexed: 12/16/2022]
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669
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Heterogeneous mesoporous SBA-15 silica as catalyst towards the synthesis of various biodegradable aliphatic polyesters. Macromol Res 2013. [DOI: 10.1007/s13233-013-1101-y] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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670
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Sensenig R, Sapir Y, MacDonald C, Cohen S, Polyak B. Magnetic nanoparticle-based approaches to locally target therapy and enhance tissue regeneration in vivo. Nanomedicine (Lond) 2013; 7:1425-42. [PMID: 22994959 DOI: 10.2217/nnm.12.109] [Citation(s) in RCA: 134] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Magnetic-based systems utilizing superparamagnetic nanoparticles and a magnetic field gradient to exert a force on these particles have been used in a wide range of biomedical applications. This review is focused on drug targeting applications that require penetration of a cellular barrier as well as strategies to improve the efficacy of targeting in these biomedical applications. Another focus of this review is regenerative applications utilizing tissue engineered scaffolds prepared with the aid of magnetic particles, the use of remote actuation for release of bioactive molecules and magneto-mechanical cell stimulation, cell seeding and cell patterning.
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Affiliation(s)
- Richard Sensenig
- Department of Surgery, Drexel University College of Medicine, PA 19102, USA
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671
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Hashimoto C, Nagamoto A, Maruyama T, Kariyama N, Irisa Y, Ikehata A, Ozaki Y. Hydration States of Poly(N-isopropylacrylamide) and Poly(N,N-diethylacrylamide) and Their Monomer Units in Aqueous Solutions with Lower Critical Solution Temperatures Studied by Infrared Spectroscopy. Macromolecules 2013. [DOI: 10.1021/ma302317m] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Chihiro Hashimoto
- Department of Applied Chemistry
and Biotechnology, Niihama National College of Technology, 7-1 Yakumo-cho, Niihama, Ehime 792-8580 Japan
| | - Akiyoshi Nagamoto
- Kohjin Co., Ltd., 4-1-21 Nihombashi Muromachi, Chuo-ku, Tokyo, 103-0022, Japan
| | - Takashi Maruyama
- Kohjin Co., Ltd., 4-1-21 Nihombashi Muromachi, Chuo-ku, Tokyo, 103-0022, Japan
| | - Naomi Kariyama
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo,
669-1337, Japan
| | - Yuma Irisa
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo,
669-1337, Japan
| | - Akifumi Ikehata
- National
Food Research Institute, National Agriculture and Food Research Organization, 2-1-12 Kannondai, Tsukuba, Ibaraki
305-8642, Japan
| | - Yukihiro Ozaki
- School of Science and Technology, Kwansei Gakuin University, 2-1 Gakuen, Sanda, Hyogo,
669-1337, Japan
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672
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De P, Sumerlin BS. Precision Control of Temperature Response by Copolymerization of Di(Ethylene Glycol) Acrylate and an Acrylamide Comonomer. MACROMOL CHEM PHYS 2013. [DOI: 10.1002/macp.201200416] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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673
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Mejia JS, Gillies ER. Triggered degradation of poly(ester amide)s via cyclization of pendant functional groups of amino acid monomers. Polym Chem 2013. [DOI: 10.1039/c3py21094d] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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674
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Li P, Xu R, Wang W, Li X, Xu Z, Yeung KW, Chu PK. Thermosensitive poly(N-isopropylacrylamide-co-glycidyl methacrylate) microgels for controlled drug release. Colloids Surf B Biointerfaces 2013; 101:251-5. [DOI: 10.1016/j.colsurfb.2012.07.009] [Citation(s) in RCA: 44] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2012] [Revised: 06/26/2012] [Accepted: 07/10/2012] [Indexed: 11/28/2022]
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675
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Ward MA, Georgiou TK. Multicompartment thermoresponsive gels: does the length of the hydrophobic side group matter? Polym Chem 2013. [DOI: 10.1039/c2py21032k] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
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676
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Huang J, Heise A. Stimuli responsive synthetic polypeptides derived from N-carboxyanhydride (NCA) polymerisation. Chem Soc Rev 2013; 42:7373-90. [DOI: 10.1039/c3cs60063g] [Citation(s) in RCA: 264] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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677
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678
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Temperature and pH dual-responsive coatings of oligoperoxide-graft-poly(N-isopropylacrylamide): Wettability, morphology, and protein adsorption. J Colloid Interface Sci 2012; 387:95-105. [DOI: 10.1016/j.jcis.2012.08.007] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2012] [Revised: 08/01/2012] [Accepted: 08/02/2012] [Indexed: 11/18/2022]
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679
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Sultana S, Khan MR, Kumar M, Kumar S, Ali M. Nanoparticles-mediated drug delivery approaches for cancer targeting: a review. J Drug Target 2012; 21:107-25. [PMID: 22873288 DOI: 10.3109/1061186x.2012.712130] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Cancer has become the leading cause of death among different populations of the world. The treatment is limited to chemotherapy, radiation, and surgery. Selective targeting to the tumor cells is possible by nanoparticles-based drug delivery system. It maximizes the drug concentration at the desired target and protects the surrounding healthy tissues at the same time. To improve the targeting potential of the anticancer drugs, nanoparticles were optimized for the size and surface characteristics to enhance their circulation time and targeting efficiency. Passive targeting involves surface modification with polyethylene glycol to avoid its elimination by natural body defense mechanism. Active targeting involves chemical interaction with certain antigen, receptors, and genes which are over expressed during progression of disease. In addition, the article highlights recent developments in "smart"-stimulus-responsive-drug carriers designed to enhance the localization and efficacy of therapeutic payloads as compared with free drug. Enhanced targeting potential, imaging, and controlled release of drugs or therapeutic molecules could be possible through multi-functional nanocarrier. Such multi-faceted, versatile nanocarriers and drug delivery systems promise a substantial increase in the efficacy of diagnostic and therapeutic applications in pharmaceutical sciences.
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680
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Glover AL, Nikles SM, Nikles JA, Brazel CS, Nikles DE. Polymer micelles with crystalline cores for thermally triggered release. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10653-60. [PMID: 22726124 PMCID: PMC3415377 DOI: 10.1021/la300895c] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Interest in the use of poly(ethylene glycol)-b-polycaprolactone diblock copolymers in a targeted, magnetically triggered drug delivery system has led to this study of the phase behavior of the polycaprolactone core. Four different diblock copolymers were prepared by the ring-opening polymerization of caprolactone from the alcohol terminus of poly(ethylene glycol) monomethylether, M(n) ≈ 2000. The critical micelle concentration depended on the degree of polymerization for the polycaprolactone block and was in the range of 2.9 to 41 mg/L. Differential scanning calorimetry curves for polymer solutions with a concentration above the critical micelle concentration showed a melting endotherm in the range of 40 to 45 °C, indicating the polycaprolactone core was semicrystalline. Pyrene was entrapped in the micelle core without interfering with the ability of the polycaprolactone to crystallize. When the polymer solution was heated above the melting point of the micelle core, the pyrene was free to leave the core. Temperature-dependent measurements of the critical micelle concentration and temperature-dependent dynamic light scattering showed that the micelles remain intact at temperatures above the melting point of the polycaprolactone core.
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Affiliation(s)
- Amanda L. Glover
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336
| | - Sarah M. Nikles
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336
| | - Jacqueline A. Nikles
- Department of Chemistry, University of Alabama at Birmingham, Birmingham, Alabama 35294-1240
| | - Christopher S. Brazel
- Department of Chemical & Biological Engineering, The University of Alabama, Tuscaloosa, Alabama 35487-0203
| | - David E. Nikles
- Department of Chemistry, The University of Alabama, Tuscaloosa, Alabama 35487-0336
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681
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Tabatabaei Rezaei SJ, Nabid MR, Niknejad H, Entezami AA. Multifunctional and thermoresponsive unimolecular micelles for tumor-targeted delivery and site-specifically release of anticancer drugs. POLYMER 2012. [DOI: 10.1016/j.polymer.2012.05.056] [Citation(s) in RCA: 56] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
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682
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Patel NG, Cavicchia JP, Zhang G, Zhang Newby BM. Rapid cell sheet detachment using spin-coated pNIPAAm films retained on surfaces by an aminopropyltriethoxysilane network. Acta Biomater 2012; 8:2559-67. [PMID: 22475785 DOI: 10.1016/j.actbio.2012.03.031] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2011] [Revised: 03/08/2012] [Accepted: 03/20/2012] [Indexed: 10/28/2022]
Abstract
The ability to harvest cell sheets grown on thermoresponsive polymers, such as poly(N-isopropylacrylamide) (pNIPAAm), has been widely studied for use in tissue engineering applications. pNIPAAm is of special interest because of the phase change that it undergoes in a physiologically relevant temperature range. Two primary approaches have been adopted to graft pNIPAAm chains covalently onto tissue culture polystyrene dishes: electron beam irradiation and plasma polymerization. These approaches often involve non-easily accessible (e.g. e-beam) facilities and complicated procedures that have hindered most tissue culture laboratories in adopting this technology for their specific applications. In this study, we developed a simple and cost-effective approach to create thermoresponsive surfaces using commercially available pNIPAAm. Using a simple spin-coating technique, thermoresponsive thin films were deposited on glass slides or silicon wafers using pNIPAAm blended with a small amount of 3-aminopropyltriethoxysilane (APTES), which enhances the retention of pNIPAAm on the surface. We found that the thermoresponsive films created using our method support cell attachment and proliferation without additional adhesive proteins as well as cell sheet detachment within minutes.
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683
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Oak M, Mandke R, Singh J. Smart polymers for peptide and protein parenteral sustained delivery. DRUG DISCOVERY TODAY. TECHNOLOGIES 2012; 9:e71-e174. [PMID: 24064273 DOI: 10.1016/j.ddtec.2012.05.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/02/2023]
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684
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Robinson JW, Schlaad H. A versatile polypeptoid platform based on N-allyl glycine. Chem Commun (Camb) 2012; 48:7835-7. [DOI: 10.1039/c2cc33881e] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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