1
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Zhao X, Shan P, Liu H, Li D, Cai P, Li Z, Li Z. Poly(ethylene glycol)s With a Single Cinnamaldehyde Acetal Unit for Fabricating Acid-Degradable Hydrogel. Front Chem 2020; 8:839. [PMID: 33102441 PMCID: PMC7522333 DOI: 10.3389/fchem.2020.00839] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2020] [Accepted: 08/11/2020] [Indexed: 11/20/2022] Open
Abstract
A synthetic route to prepare a poly(ethylene glycol) with a single cinnamaldehyde acetal unit in the polymer chain, was successfully established using a newly synthesized cinnamaldehyde acetal diethylene glycol (CADEG) as initiator. This HO-PEG(ca)-OH is non-toxic and would be degraded into a cinnamaldehyde and two PEG diols in acid environment. A whole polyethylene glycol based hydrogel was easily fabricated by thiol-ene “click” reaction in alkalescence aqueous solution using acrylate-PEG(ca)-acrylate and 4-arm PEG-SH as raw materials at room temperature. The gel time was dependent on the pH of the solution and its alkalinity can promote gel. The hydrogel can be degradable in acidic conditions and the stronger the acidity, the faster the degradation. This HO-PEG(ca)-OH also can be used in synthesis of cinnamaldehyde containing PEG derivatives, block copolymers or other acid degradable materials.
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Affiliation(s)
- Xinyue Zhao
- State Key Laboratory of Optometry & Vision Science, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
| | - Pengfei Shan
- State Key Laboratory of Optometry & Vision Science, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Haiwei Liu
- The Department of Neurology, The First Affiliated Hospital of Wenzhou Medical University, Wenzhou, China
| | - Daai Li
- State Key Laboratory of Optometry & Vision Science, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China.,College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Peihan Cai
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Zhongyu Li
- College of Chemistry and Materials Engineering, Wenzhou University, Wenzhou, China
| | - Zhihui Li
- State Key Laboratory of Optometry & Vision Science, School of Optometry and Ophthalmology and Eye Hospital, Wenzhou Medical University, Wenzhou, China
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2
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Yardley RE, Rabiee Kenaree A, Liang X, Gillies ER. Transesterification of Poly(ethyl glyoxylate): A Route to Structurally Diverse Polyglyoxylates. Macromolecules 2020. [DOI: 10.1021/acs.macromol.0c01197] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rebecca E. Yardley
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
| | - Amir Rabiee Kenaree
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
| | - Xiaoli Liang
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
| | - Elizabeth R. Gillies
- Department of Chemistry and Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B7, Canada
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario N6A 5B9, Canada
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3
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4
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5
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Sirianni QEA, Rabiee Kenaree A, Gillies ER. Polyglyoxylamides: Tuning Structure and Properties of Self-Immolative Polymers. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b02616] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- Quinton E. A. Sirianni
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario, Canada N6A 5B7
| | - Amir Rabiee Kenaree
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario, Canada N6A 5B7
| | - Elizabeth R. Gillies
- Department of Chemistry and the Centre for Advanced Materials and Biomaterials Research, The University of Western Ontario, 1151 Richmond St., London, Ontario, Canada N6A 5B7
- Department of Chemical and Biochemical Engineering, The University of Western Ontario, 1151 Richmond St., London, Ontario, Canada N6A 5B9
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6
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Fan B, Trant JF, Gillies ER. End-Capping Strategies for Triggering End-to-End Depolymerization of Polyglyoxylates. Macromolecules 2016. [DOI: 10.1021/acs.macromol.6b02320] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Bo Fan
- Department of Chemical
and Biochemical Engineering, The University of Western Ontario, 1151
Richmond St., London, Ontario, Canada N6A 5B9
| | - John F. Trant
- Department
of Chemistry, The University of Western Ontario, 1151 Richmond
St., London, Ontario, Canada N6A 5B7
| | - Elizabeth R. Gillies
- Department of Chemical
and Biochemical Engineering, The University of Western Ontario, 1151
Richmond St., London, Ontario, Canada N6A 5B9
- Department
of Chemistry, The University of Western Ontario, 1151 Richmond
St., London, Ontario, Canada N6A 5B7
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7
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Rajput BS, Chander U, Arole K, Stempfle F, Menon S, Mecking S, Chikkali SH. Synthesis of Renewable Copolyacetals with Tunable Degradation. MACROMOL CHEM PHYS 2016. [DOI: 10.1002/macp.201600071] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Bhausaheb S. Rajput
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 MH India
| | - Umesh Chander
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 MH India
| | - Kailash Arole
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 MH India
| | - Florian Stempfle
- Chair of Chemical Materials Science; Department of Chemistry; University of Konstanz; 78464 Konstanz Germany
| | - Shamal Menon
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 MH India
| | - Stefan Mecking
- Chair of Chemical Materials Science; Department of Chemistry; University of Konstanz; 78464 Konstanz Germany
| | - Samir H. Chikkali
- Polymer Science and Engineering Division; CSIR-National Chemical Laboratory; Dr. Homi Bhabha Road Pune 411008 MH India
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8
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Pohlit H, Bellinghausen I, Schömer M, Heydenreich B, Saloga J, Frey H. Biodegradable pH-Sensitive Poly(ethylene glycol) Nanocarriers for Allergen Encapsulation and Controlled Release. Biomacromolecules 2015; 16:3103-11. [PMID: 26324124 DOI: 10.1021/acs.biomac.5b00458] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
In the last decades, the number of allergic patients has increased dramatically. Allergen-specific immunotherapy (SIT) is the only available cause-oriented therapy so far. SIT reduces the allergic symptoms, but also exhibits some disadvantages; that is, it is a long-lasting procedure and severe side effects like anaphylactic shock can occur. In this work, we introduce a method to encapsulate allergens into nanoparticles to avoid severe side effects during SIT. Degradable nanocarriers combine the advantage of providing a physical barrier between the encapsulated cargo and the biological environment as well as responding to certain local stimuli (like pH) to release their cargo. This work introduces a facile strategy for the synthesis of acid-labile poly(ethylene glycol) (PEG)-macromonomers that degrade at pH 5 (physiological pH inside the endolysosome) and can be used for nanocarrier synthesis. The difunctional, water-soluble PEG dimethacrylate (PEG-acetal-DMA) macromonomers with cleavable acetal units were analyzed with 1H NMR, SEC, and MALDI-ToF-MS. Both the allergen and the macromonomers were entrapped inside liposomes as templates, which were produced by dual centrifugation (DAC). Radical polymerization of the methacrylate units inside the liposomes generated allergen-loaded PEG nanocarriers. In vitro studies demonstrated that dendritic cells (DCs) internalize the protein-loaded, nontoxic PEG-nanocarriers. Furthermore, we demonstrate by cellular antigen stimulation tests that the nanocarriers effectively shield the allergen cargo from detection by immunoglobulins on the surface of basophilic leucocytes. Uptake of nanocarriers into DCs does not lead to cell maturation; however, the internalized allergen was capable to induce T cell immune responses.
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Affiliation(s)
- Hannah Pohlit
- Department of Dermatology, University Medical Center Mainz , Langenbeckstr. 1, 55131 Mainz, Germany.,Institute of Organic Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany.,Graduate School Materials Science in Mainz, Staudinger Weg 9, 55128 Mainz, Germany
| | - Iris Bellinghausen
- Department of Dermatology, University Medical Center Mainz , Langenbeckstr. 1, 55131 Mainz, Germany
| | - Martina Schömer
- Institute of Organic Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
| | - Bärbel Heydenreich
- Department of Dermatology, University Medical Center Mainz , Langenbeckstr. 1, 55131 Mainz, Germany
| | - Joachim Saloga
- Department of Dermatology, University Medical Center Mainz , Langenbeckstr. 1, 55131 Mainz, Germany
| | - Holger Frey
- Institute of Organic Chemistry, University of Mainz , Duesbergweg 10-14, 55128 Mainz, Germany
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9
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Lim Y, Heo GS, Rezenom YH, Pollack S, Raymond JE, Elsabahy M, Wooley KL. Development of a Vinyl Ether-Functionalized Polyphosphoester as a Template for Multiple Postpolymerization Conjugation Chemistries and Study of Core Degradable Polymeric Nanoparticles. Macromolecules 2014; 47:4634-4644. [PMID: 25601803 PMCID: PMC4296319 DOI: 10.1021/ma402480a] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2013] [Revised: 06/11/2014] [Indexed: 12/21/2022]
Abstract
A novel polyphosphoester (PPE) with vinyl ether side chain functionality was developed as a versatile template for postpolymerization modifications, and its degradability and biocompatibility were evaluated. An organo-catalyzed ring-opening polymerization of ethylene glycol vinyl ether-pendant cyclic phosphotriester monomer allowed for construction of poly(ethylene glycol vinyl ether phosphotriester) (PEVEP). This vinyl ether-functionalized PPE scaffold was coupled with hydroxyl- or thiol-containing model small molecules via three different types of conjugation chemistries-thiol-ene "click" reaction, acetalization, or thio-acetalization reaction-to afford modified polymers that accommodated either stable thio-ether or hydrolytically labile acetal or thio-acetal linkages. Amphiphilic diblock copolymers of poly(ethylene glycol) and PEVEP formed well-defined micelles with a narrow and monomodal size distribution in water, as confirmed by dynamic light scattering (DLS), transmission electron microscopy, and atomic force microscopy. The stability of the micelles and the hydrolytic degradability of the backbone and side chains of the PEVEP block segment were assessed by DLS and nuclear magnetic resonance spectroscopy (1H and 31P), respectively, in aqueous buffer solutions at pH values of 5.0 and 7.4 and at temperatures of 25 and 37 °C. The hydrolytic degradation products of the PEVEP segments of the block copolymers were then identified by electrospray ionization, gas chromatography, and matrix-assisted laser desorption/ionization mass spectrometry. The parent micelles and their degradation products were found to be non-cytotoxic at concentrations up to 3 mg/mL, when evaluated with RAW 264.7 mouse macrophages and OVCAR-3 human ovarian adenocarcinoma cells.
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Affiliation(s)
- Young
H. Lim
- Departments
of Chemistry, Chemical Engineering, and Materials Science and Engineering,
Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012,
3255 TAMU, College Station, Texas 77842-3012, United States
| | - Gyu Seong Heo
- Departments
of Chemistry, Chemical Engineering, and Materials Science and Engineering,
Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012,
3255 TAMU, College Station, Texas 77842-3012, United States
| | - Yohannes H. Rezenom
- Laboratory
for Biological Mass Spectrometry, Department of Chemistry, Texas A&M University, College Station, Texas 77843, United States
| | - Stephanie Pollack
- Departments
of Chemistry, Chemical Engineering, and Materials Science and Engineering,
Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012,
3255 TAMU, College Station, Texas 77842-3012, United States
| | - Jeffery E. Raymond
- Departments
of Chemistry, Chemical Engineering, and Materials Science and Engineering,
Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012,
3255 TAMU, College Station, Texas 77842-3012, United States
| | - Mahmoud Elsabahy
- Departments
of Chemistry, Chemical Engineering, and Materials Science and Engineering,
Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012,
3255 TAMU, College Station, Texas 77842-3012, United States
- Department
of Pharmaceutics, Faculty of Pharmacy, Assiut Clinical Center of Nanomedicine,
Al-Rajhy Liver Hospital, Assiut University, Assiut, Egypt
| | - Karen L. Wooley
- Departments
of Chemistry, Chemical Engineering, and Materials Science and Engineering,
Laboratory for Synthetic-Biologic Interactions, Texas A&M University, P.O. Box 30012,
3255 TAMU, College Station, Texas 77842-3012, United States
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10
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Spring AM, Estrada LA, Vasilyeva SV, Rinzler AG, Reynolds JR. Carbon Nanotube Adsorptive Materials Derived from Acid Degradable Poly(acetals). Macromolecules 2014. [DOI: 10.1021/ma500009s] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Andrew M. Spring
- The
George and Josephine Butler Polymer Chemistry Laboratories, Department
of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Leandro A. Estrada
- School
of Chemistry and Biochemistry, School of Materials Science and Engineering,
Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- The
George and Josephine Butler Polymer Chemistry Laboratories, Department
of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
| | - Svetlana V. Vasilyeva
- Department
of Physics, University of Florida, Gainesville, Florida 32611, United States
| | - Andrew G. Rinzler
- Department
of Physics, University of Florida, Gainesville, Florida 32611, United States
| | - John R. Reynolds
- School
of Chemistry and Biochemistry, School of Materials Science and Engineering,
Center for Organic Photonics and Electronics, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
- The
George and Josephine Butler Polymer Chemistry Laboratories, Department
of Chemistry, Center for Macromolecular Science and Engineering, University of Florida, Gainesville, Florida 32611, United States
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11
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Mehta R, Kumari R, Das P, Bhowmick AK. Synthesis and characterization of a biocompatible monotyrosine-based polymer and its interaction with DNA. J Mater Chem B 2014; 2:6236-6248. [DOI: 10.1039/c4tb00854e] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A monotyrosine based copolymer was synthesized, characterized and studied for its interaction with DNA for potential biological applications.
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Affiliation(s)
- Radhika Mehta
- Department of Chemistry
- Indian Institute of Technology
- Patna, India-800013
| | - Rina Kumari
- Department of Chemistry
- Indian Institute of Technology
- Patna, India-800013
| | - Prolay Das
- Department of Chemistry
- Indian Institute of Technology
- Patna, India-800013
| | - Anil K. Bhowmick
- Department of Chemistry
- Indian Institute of Technology
- Patna, India-800013
- Department of Materials Science
- Indian Institute of Technology
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12
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Dingels C, Müller SS, Steinbach T, Tonhauser C, Frey H. Universal Concept for the Implementation of a Single Cleavable Unit at Tunable Position in Functional Poly(ethylene glycol)s. Biomacromolecules 2013; 14:448-59. [DOI: 10.1021/bm3016797] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Carsten Dingels
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
| | - Sophie S. Müller
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, D-55128
Mainz, Germany
| | - Tobias Steinbach
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, D-55128
Mainz, Germany
| | - Christine Tonhauser
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
- Graduate School Materials Science in Mainz, Staudingerweg 9, D-55128
Mainz, Germany
| | - Holger Frey
- Department of Organic
Chemistry, Johannes Gutenberg-Universität Mainz, Duesbergweg 10-14, D-55099 Mainz, Germany
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13
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Dingels C, Frey H. From Biocompatible to Biodegradable: Poly(Ethylene Glycol)s with Predetermined Breaking Points. HIERARCHICAL MACROMOLECULAR STRUCTURES: 60 YEARS AFTER THE STAUDINGER NOBEL PRIZE II 2013. [DOI: 10.1007/12_2013_235] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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14
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Tonhauser C, Schüll C, Dingels C, Frey H. Branched Acid-Degradable, Biocompatible Polyether Copolymers via Anionic Ring-Opening Polymerization Using an Epoxide Inimer. ACS Macro Lett 2012; 1:1094-1097. [PMID: 35607173 DOI: 10.1021/mz300265z] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
Abstract
The introduction of acid-degradable acetal moieties into a hyperbranched polyether backbone has been achieved by the design of a novel epoxide-based degradable inimer. This new monomer, namely, 1-(glycidyloxy)ethyl ethylene glycol ether (GEGE), has been copolymerized in the anionic ring-opening polymerization (AROP) with ethylene oxide (EO) or glycidol (G), respectively, yielding branched polyethers, that is, P(EO-co-GEGE) and P(G-co-GEGE), that possess an adjustable amount of acid-cleavable acetal units. In addition, a novel class of multiarm star copolymers P(G-co-GEGE-g-EO) with acid-labile polyether core and PEG side chains was synthesized by using the P(G-co-GEGE) copolymers as multifunctional macroinitiators for AROP of EO. The new materials have been characterized in a detailed manner, revealing narrow to moderate molecular weight distributions. The degradation of these polymers under acidic conditions was characterized via SEC and 1H NMR spectroscopy.
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Affiliation(s)
- Christine Tonhauser
- Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz,
Germany
- Institute of Organic
Chemistry, Organic and Macromolecular Chemistry, Duesbergweg 10-14, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - Christoph Schüll
- Graduate School Materials Science in Mainz, Staudingerweg 9, 55128 Mainz,
Germany
- Institute of Organic
Chemistry, Organic and Macromolecular Chemistry, Duesbergweg 10-14, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - Carsten Dingels
- Institute of Organic
Chemistry, Organic and Macromolecular Chemistry, Duesbergweg 10-14, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
| | - Holger Frey
- Institute of Organic
Chemistry, Organic and Macromolecular Chemistry, Duesbergweg 10-14, Johannes Gutenberg-University Mainz, 55099 Mainz, Germany
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15
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Chikkali S, Stempfle F, Mecking S. Long-Chain Polyacetals From Plant Oils. Macromol Rapid Commun 2012; 33:1126-9. [DOI: 10.1002/marc.201200226] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2012] [Revised: 04/24/2012] [Indexed: 11/06/2022]
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16
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Feng X, Chaikof EL, Absalon C, Drummond C, Taton D, Gnanou Y. Dendritic Carrier Based on PEG: Design and Degradation of Acid-sensitive Dendrimer-like Poly(ethylene oxide)s. Macromol Rapid Commun 2011; 32:1722-8. [DOI: 10.1002/marc.201100459] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2011] [Indexed: 01/08/2023]
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17
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Wang Y, Morinaga H, Sudo A, Endo T. Synthesis of amphiphilic polyacetal by polycondensation of aldehyde and polyethylene glycol as an acid-labile polymer for controlled release of aldehyde. ACTA ACUST UNITED AC 2010. [DOI: 10.1002/pola.24425] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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18
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Heath F, Saeed AO, Pennadam SS, Thurecht KJ, Alexander C. ‘Isothermal’ phase transitions and supramolecular architecture changes in thermoresponsive polymers via acid-labile side-chains. Polym Chem 2010. [DOI: 10.1039/c0py00080a] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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19
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Cui W, Qi M, Li X, Huang S, Zhou S, Weng J. Electrospun fibers of acid-labile biodegradable polymers with acetal groups as potential drug carriers. Int J Pharm 2008; 361:47-55. [DOI: 10.1016/j.ijpharm.2008.05.005] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2008] [Revised: 04/26/2008] [Accepted: 05/08/2008] [Indexed: 10/22/2022]
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20
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Qi M, Li X, Yang Y, Zhou S. Electrospun fibers of acid-labile biodegradable polymers containing ortho ester groups for controlled release of paracetamol. Eur J Pharm Biopharm 2008; 70:445-52. [PMID: 18603416 DOI: 10.1016/j.ejpb.2008.05.003] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2008] [Revised: 04/26/2008] [Accepted: 05/07/2008] [Indexed: 10/22/2022]
Abstract
The local delivery and controllable release profiles make electrospun ultrafine fibers as potential implantable drug carriers and functional coatings of medical devices. There are few attempts to form acid-labile electrospun fibers, whose release behaviors respond to the local environment and fiber characteristics. In the current study a novel strategy was presented to synthesize biodegradable pH-sensitive polymers containing ortho ester groups. The acid-labile segments were synthesized through reacting 3,9-dimethylene-2,4,8,10-tetraoxaspiro [5.5] undecane with 1,10-decanediol or poly(ethylene glycol), which were further copolymerized with D,L-lactide to obtain triblock copolymers. Biodegradable acid-labile polymers were electrospun with the encapsulation of paracetamol as a model drug. In vitro release study showed that the total amount of drug released from acid-labile polymeric fibers was accelerated after incubation into acid buffer solutions, and the amount of initial burst release and sustained release rate were significantly higher for matrix polymers with hydrophilic acid-labile segments. In vitro degradation study indicated that the electrospun fibers containing acid-labile segments were stable in neutral buffer solution, but the molecular weight reduction of matrix polymers, the morphological changes and mass loss of fibrous mats were significantly enhanced under acid circumstances.
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Affiliation(s)
- Mingbo Qi
- School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu, PR China
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21
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Abstract
Biopolymer therapeutics are likely to be the next generation of medicines, and nucleic acids are among the most important of these potential drugs. The challenges of delivering genes are formidable and advanced biomimetic materials are expected to be required. Polymers that can respond to changes in temperature and pH are good candidates for gene delivery vehicles, as the stimulus response can be used to alter their interactions with the drug payload. In this review, the chemistries underlying these responsive polymers are considered, and the possible mechanisms by which nucleic acids, primarily DNA, can be protected during transit and released at target sites are outlined. Sophisticated multicomponent polymers are being developed, with functionalities designed to overcome the barriers to gene delivery at both the systemic and local level; key examples are highlighted. The extension of these materials to yet more advanced therapies, such as cell delivery and regenerative medicine, is outlined as an emerging technology for the future.
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Affiliation(s)
- Cameron Alexander
- The School of Pharmacy, Boots Science Building, University of Nottingham, University Park, Nottingham, NG7 2RD, UK.
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