1
|
Knap K, Reczyńska-Kolman K, Kwiecień K, Niewolik D, Płonka J, Ochońska D, Jeleń P, Mielczarek P, Kazek-Kęsik A, Jaszcz K, Brzychczy-Włoch M, Pamuła E. Poly(sebacic acid) microparticles loaded with azithromycin as potential pulmonary drug delivery system: Physicochemical properties, antibacterial behavior, and cytocompatibility studies. BIOMATERIALS ADVANCES 2023; 153:213540. [PMID: 37429048 DOI: 10.1016/j.bioadv.2023.213540] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2023] [Revised: 06/22/2023] [Accepted: 06/26/2023] [Indexed: 07/12/2023]
Abstract
Recurrent bacterial infections are a common cause of death for patients with cystic fibrosis and chronic obstructive pulmonary disease. Herein, we present the development of the degradable poly(sebacic acid) (PSA) microparticles loaded with different concentrations of azithromycin (AZ) as a potential powder formulation to deliver AZ locally to the lungs. We characterized microparticle size, morphology, zeta potential, encapsulation efficiency, interaction PSA with AZ and degradation profile in phosphate buffered saline (PBS). The antibacterial properties were evaluated using the Kirby-Bauer method against Staphylococcus aureus. Potential cytotoxicity was evaluated in BEAS-2B and A549 lung epithelial cells by the resazurin reduction assay and live/dead staining. The results show that microparticles are spherical and their size, being in the range of 1-5 μm, should be optimal for pulmonary delivery. The AZ encapsulation efficiency is nearly 100 % for all types of microparticles. The microparticles degradation rate is relatively fast - after 24 h their mass decreased by around 50 %. The antibacterial test showed that released AZ was able to successfully inhibit bacteria growth. The cytotoxicity test showed that the safe concentration of both unloaded and AZ-loaded microparticles was equal to 50 μg/ml. Thus, appropriate physicochemical properties, controlled degradation and drug release, cytocompatibility, and antibacterial behavior showed that our microparticles may be promising for the local treatment of lung infections.
Collapse
Affiliation(s)
- Karolina Knap
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials and Composites, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Katarzyna Reczyńska-Kolman
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials and Composites, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Konrad Kwiecień
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials and Composites, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Daria Niewolik
- Silesian University of Technology, Faculty of Chemistry, Department of Physical Chemistry and Technology of Polymers, ul. M. Strzody 9, 44-100 Gliwice, Poland
| | - Joanna Płonka
- Silesian University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, ul. Krzywoustego 6, Gliwice 44-100, Poland
| | - Dorota Ochońska
- Jagiellonian University Medical College, Faculty of Medicine, Chair of Microbiology, Department of Molecular Medical Microbiology, ul. Św. Anny 12, 31-121 Kraków, Poland
| | - Piotr Jeleń
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Silicate Chemistry and Macromolecular Compounds, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Przemysław Mielczarek
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Analytical Chemistry and Biochemistry, Al. Mickiewicza 30, 30-059 Kraków, Poland
| | - Alicja Kazek-Kęsik
- Silesian University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, ul. Krzywoustego 6, Gliwice 44-100, Poland
| | - Katarzyna Jaszcz
- Silesian University of Technology, Faculty of Chemistry, Department of Physical Chemistry and Technology of Polymers, ul. M. Strzody 9, 44-100 Gliwice, Poland
| | - Monika Brzychczy-Włoch
- Jagiellonian University Medical College, Faculty of Medicine, Chair of Microbiology, Department of Molecular Medical Microbiology, ul. Św. Anny 12, 31-121 Kraków, Poland
| | - Elżbieta Pamuła
- AGH University of Science and Technology, Faculty of Materials Science and Ceramics, Department of Biomaterials and Composites, Al. Mickiewicza 30, 30-059 Kraków, Poland.
| |
Collapse
|
2
|
Abstract
Polyanhydrides (PAs) are a class of synthetic biodegradable polymers employed as controlled drug delivery vehicles. They can be synthesized and scaled up from low-cost starting materials. The structure of PAs can be manipulated synthetically to meet desirable characteristics. PAs are biocompatible, biodegradable, and generate nontoxic metabolites upon degradation, which are easily eliminated from the body. The rate of water penetrating into the polyanhydride (PA) matrix is slower than the anhydride bond cleavage. This phenomenon sets PAs as "surface-eroding drug delivery carriers." Consequently, a variety of PA-based drug delivery carriers in the form of solid implants, pasty injectable formulations, microspheres, nanoparticles, etc. have been developed for the sustained release of small molecule drugs, and vaccines, peptide drugs, and nucleic acid-based active agents. The rate of drug delivery is often controlled by the polymer erosion rate, which is influenced by the polymer structure and composition, crystallinity, hydrophobicity, pH of the release medium, device size, configuration, etc. Owing to the above-mentioned interesting physicochemical and mechanical properties of PAs, the present review focuses on the advancements made in the domain of synthetic biodegradable biomedical PAs for therapeutic delivery applications. Various classes of PAs, their structures, their unique characteristics, their physicochemical and mechanical properties, and factors influencing surface erosion are discussed in detail. The review also summarizes various methods involved in the synthesis of PAs and their utility in the biomedical domain as drug, vaccine, and peptide delivery carriers in different formulations are reviewed.
Collapse
Affiliation(s)
- Pulikanti Guruprasad Reddy
- School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, and Centre for Cannabis Research and the Institute of Drug Research, The Alex Grass Centre for Drug Design and Synthesis, Jerusalem 9112002, Israel
| | - Abraham J Domb
- School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, and Centre for Cannabis Research and the Institute of Drug Research, The Alex Grass Centre for Drug Design and Synthesis, Jerusalem 9112002, Israel
| |
Collapse
|
3
|
Johnson AR, Forster SP, White D, Terife G, Lowinger M, Teller RS, Barrett SE. Drug eluting implants in pharmaceutical development and clinical practice. Expert Opin Drug Deliv 2021; 18:577-593. [PMID: 33275066 DOI: 10.1080/17425247.2021.1856072] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Introduction: Drug eluting implants offer patient convenience and improved compliance through less frequent dosing, eliminating repeated, painful injections and providing localized, site specific delivery with applications in contraception, ophthalmology, and oncology.Areas covered: This review provides an overview of available implant products, design approaches, biodegradable and non-biodegradable polymeric materials, and fabrication techniques with a focus on commercial applications and industrial drug product development. Developing trends in the field, including expanded availability of suitable excipients, development of novel materials, scaled down manufacturing process, and a wider understanding of the implant development process are discussed and point to opportunities for differentiated drug eluting implant products.Expert opinion: In the future, long-acting implants will be important clinical tools for prophylaxis and treatment of global health challenges, especially for infectious diseases, to reduce the cost and difficulty of treating chronic indications, and to prolong local delivery in difficult to administer parts of the body. These products will help improve patient safety, adherence, and comfort.
Collapse
Affiliation(s)
- Ashley R Johnson
- Pharmaceutical Sciences, Merck & Co., Inc., Merck & Co., Inc., Rahway, NJ, USA
| | - Seth P Forster
- Pharmaceutical Sciences, Merck & Co., Inc., Merck & Co., Inc., Rahway, NJ, USA
| | | | - Graciela Terife
- Pharmaceutical Sciences, Merck & Co., Inc., Merck & Co., Inc., Rahway, NJ, USA
| | - Michael Lowinger
- Pharmaceutical Sciences, Merck & Co., Inc., Merck & Co., Inc., Rahway, NJ, USA
| | | | - Stephanie E Barrett
- Pharmaceutical Sciences, Merck & Co., Inc., Merck & Co., Inc., Rahway, NJ, USA
| |
Collapse
|
4
|
Antibacterial and cytocompatible coatings based on poly(adipic anhydride) for a Ti alloy surface. Bioact Mater 2020; 5:709-720. [PMID: 32478204 PMCID: PMC7248586 DOI: 10.1016/j.bioactmat.2020.04.020] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 04/21/2020] [Accepted: 04/27/2020] [Indexed: 12/20/2022] Open
Abstract
This paper describes a formation of hybrid coatings on a Ti–2Ta–3Zr–36Nb surface. This is accomplished by plasma electrolytic oxidation and a dip-coating technique with poly(adipic anhydride) ((C6H8O3)n) that is loaded with drugs: amoxicillin (C16H19N3O5S), cefazolin (C14H14N8O4S3) or vancomycin (C66H75Cl2N9O24 · xHCl). The characteristic microstructure of the polymer was evaluated using scanning electron microscopy and confocal microscopy. Depending on the surface treatment, the surface roughness varied (between 1.53 μm and 2.06 μm), and the wettability was change with the over of time. X-ray photoelectron spectroscopy analysis showed that the oxide layer did not affect the polymer layer or loaded drugs. However, the drugs lose their stability in a phosphate-buffered saline solution after 6.5 h of exposure, and its decrease was greater than 7% (HPLC analysis). The stability, drug release and concentration of the drug loaded into the material were precisely analyzed by high-performance liquid chromatography. The results correlated with the degradation of the polymer in which the addition of drugs caused the percent of degraded polymer to be between 35.5% and 49.4% after 1 h of material immersion, depending on the mass of the loaded drug and various biological responses that were obtained. However, all of the coatings were cytocompatible with MG-63 osteoblast-like cells. The drug concentrations released from the coatings were sufficient to inhibit adhesion of reference and clinical bacterial strains (S. aureus). The coatings with amoxicillin showed the best results in the bacterial inhibition zone, whereas coatings with cefazolin inhibited adhesion of the above bacteria on the surface. Hybrid layers containing fast degradable poly(adipic anhydride) (PADA) were performed. Drugs stability, concentration of released and loaded drugs were evaluated using HPLC. Adhesion of S. aureus clinical and reference strains confirmed the antibaterial properties. Performed hybrid layers were cytocompatible (MG-63 tests).
Collapse
|
5
|
Leśniak K, Płonka J, Śmiga-Matuszowicz M, Brzychczy-Włoch M, Kazek-Kęsik A. Functionalization of PEO layer formed on Ti-15Mo for biomedical application. J Biomed Mater Res B Appl Biomater 2019; 108:1568-1579. [PMID: 31643133 DOI: 10.1002/jbm.b.34504] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2019] [Revised: 09/13/2019] [Accepted: 10/06/2019] [Indexed: 01/18/2023]
Abstract
In the present work, deposition of poly(sebacic anhydride) PSBA loaded by amoxicillin, cefazolin, or vancomycin on a previously anodized Ti-15Mo surface is presented. PSBA loaded by the drug was deposited so as not to lose the functionality of the porous oxide layer microstructure. The morphology was evaluated using scanning electron microscopy, surface roughness, and wettability. The drug concentration was evaluated using high-performance liquid chromatography. It was determined that the drugs were loaded into coatings in the range of 35.2-122.87 μg/cm2 of Ti sample. The drugs released more than 16% after 0.5 hr of the hybrid coating immersion in artificial saliva. After 3 days, the PSBA coatings were degraded by 51.3 mol %, and after 7 days by 77.8 mol %, which makes it possible to load the material by different, biologically active substances. An antimicrobial investigation of Staphylococcus aureus (DSM 24167) and Staphylococcus epidermidis (ATCC 700296) confirmed the activity of the hybrid layers against the pathogens. Hybrid layer with vancomycin best inhibits the adhesion of the bacteria, whereas coatings with amoxicillin and cefazolin showed a much better bactericidal activity. In this article, the difference in the obtained results is discussed, as well as the possibility of the application of this functional material in biomedicine.
Collapse
Affiliation(s)
- Katarzyna Leśniak
- Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, Silesian University of Technology, Gliwice, Poland
| | - Joanna Płonka
- Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, Silesian University of Technology, Gliwice, Poland
| | - Monika Śmiga-Matuszowicz
- Faculty of Chemistry, Department of Physical Chemistry and Technology of Polymers, Silesian University of Technology, Gliwice, Poland
| | | | - Alicja Kazek-Kęsik
- Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, Silesian University of Technology, Gliwice, Poland
| |
Collapse
|
6
|
Ogueri KS, Jafari T, Escobar Ivirico JL, Laurencin CT. POLYMERIC BIOMATERIALS FOR SCAFFOLD-BASED BONE REGENERATIVE ENGINEERING. REGENERATIVE ENGINEERING AND TRANSLATIONAL MEDICINE 2019; 5:128-154. [PMID: 31423461 PMCID: PMC6697158 DOI: 10.1007/s40883-018-0072-0] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2017] [Accepted: 06/28/2018] [Indexed: 10/28/2022]
Abstract
Reconstruction of large bone defects resulting from trauma, neoplasm, or infection is a challenging problem in reconstructive surgery. The need for bone grafting has been increasing steadily partly because of our enhanced capability to salvage limbs after major bone loss. Engineered bone graft substitutes can have advantages such as lack of antigenicity, high availability, and varying properties depending on the applications chosen for use. These favorable attributes have contributed to the rise of scaffold-based polymeric tissue regeneration. Critical components in the scaffold-based polymeric regenerative engineering approach often include 1. The existence of biodegradable polymeric porous structures with properties selected to promote tissue regeneration and while providing appropriate mechanical support during tissue regeneration. 2. Cellular populations that can influence and enhance regeneration. 3. The use of growth and morphogenetic factors which can influence cellular migration, differentiation and tissue regeneration in vivo. Biodegradable polymers constitute an attractive class of biomaterials for the development of scaffolds due to their flexibility in chemistry and their ability to produce biocompatible degradation products. This paper presents an overview of polymeric scaffold-based bone tissue regeneration and reviews approaches as well as the particular roles of biodegradable polymers currently in use.
Collapse
Affiliation(s)
- Kenneth S. Ogueri
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Tahereh Jafari
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
| | - Jorge L. Escobar Ivirico
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| | - Cato T. Laurencin
- Department of Materials Science and Engineering, University of Connecticut, Storrs, CT 06269, USA
- Institute for Regenerative Engineering, University of Connecticut Health Center, Farmington, CT 06030, USA
- Raymond and Beverly Sackler Center for Biomedical, Biological, Physical and Engineering Sciences, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Orthopaedic Surgery, University of Connecticut Health Center, Farmington, CT 06030, USA
- Department of Biomedical Engineering, University of Connecticut, Storrs, CT 06269, USA
- Department of Chemical and Biomolecular Engineering, University of Connecticut, Storrs, CT 06269, USA
| |
Collapse
|
7
|
HIF-1α- Targeting Acriflavine Provides Long Term Survival and Radiological Tumor Response in Brain Cancer Therapy. Sci Rep 2017; 7:14978. [PMID: 29097800 PMCID: PMC5668269 DOI: 10.1038/s41598-017-14990-w] [Citation(s) in RCA: 52] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2017] [Accepted: 10/19/2017] [Indexed: 11/08/2022] Open
Abstract
Tumor progression, limited efficacy of current standard treatments, and the rise in patient mortality are associated with gene expression caused by the synergistic action of intratumoral hypoxia and HIF-1α activation. For this reason, recent investigations have focused on HIF-targeting therapeutic agents, with encouraging preclinical and clinical results in solid tumors. Here we describe the efficacy of a HIF-1α inhibitor, Acriflavine, and demonstrate its potency against brain cancer. This safe antibacterial dye induces cell death and apoptosis in several glioma cell lines, targets HIF-1α-mediated pathways, and decreases the level of PGK1, VEGF and HIF-1α in vitro and in vivo. Administered locally via biodegradable polymers, Acriflavine provides significant benefits in survival resulting in nearly 100% long term survival, confirmed by MRI and histological analyses. This study reports preclinical evidence that this safe, small molecule can contribute to brain tumor therapy and highlights the significance of HIF-1α-targeting molecules.
Collapse
|
8
|
Ponnurangam S, O'Connell GD, Hung CT, Somasundaran P. Biocompatibility of polysebacic anhydride microparticles with chondrocytes in engineered cartilage. Colloids Surf B Biointerfaces 2015; 136:207-13. [PMID: 26398146 DOI: 10.1016/j.colsurfb.2015.08.040] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Revised: 06/30/2015] [Accepted: 08/24/2015] [Indexed: 12/24/2022]
Abstract
One of main challenges in developing clinically relevant engineered cartilage is overcoming limited nutrient diffusion due to progressive elaboration of extracellular matrix at the periphery of the construct. Macro-channels have been used to decrease the nutrient path-length; however, the channels become occluded with matrix within weeks in culture, reducing nutrient diffusion. Alternatively, microparticles can be imbedded throughout the scaffold to provide localized nutrient delivery. In this study, we evaluated biocompatibility of polysebacic anhydride (PSA) polymers and the effectiveness of PSA-based microparticles for short-term delivery of nutrients in engineered cartilage. PSA-based microparticles were biocompatible with juvenile bovine chondrocytes for concentrations up to 2mg/mL; however, cytotoxicity was observed at 20mg/mL. Cytotoxicity at high concentrations is likely due to intracellular accumulation of PSA degradation products and resulting lipotoxicity. Cytotoxicity of PSA was partially reversed in the presence of bovine serum albumin. In conclusion, the findings from this study demonstrate concentration-dependent biocompatibility of PSA-based microparticles and potential application as a nutrient delivery vehicle that can be imbedded in scaffolds for tissue engineering.
Collapse
Affiliation(s)
- Sathish Ponnurangam
- Earth and Environmental Engineering, 500 W, 120th street, 918 Mudd Columbia University, New York, NY, 10027, United States.
| | - Grace D O'Connell
- Mechanical Engineering, 5122 Etcheverry Hall, University of California, Berkeley, CA 94720, United States
| | - Clark T Hung
- Biomedical engineering, 351 Engineering Terrace, 1210 Amsterdam Avenue, Columbia University, New York, NY 10027, United States
| | - Ponisseril Somasundaran
- Earth and Environmental Engineering, 500 W, 120th street, 918 Mudd Columbia University, New York, NY, 10027, United States
| |
Collapse
|
9
|
Oledzka E, Sliwerska P, Sobczak M, Kraska B, Kamysz W, Nalecz-Jawecki G, Kolodziejski W. Peptide Dendrimer Functionalized with Amphiphilic Triblock Copolymers: Synthesis and Characterization. MACROMOL CHEM PHYS 2015. [DOI: 10.1002/macp.201500033] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Ewa Oledzka
- Department of Inorganic and Analytical Chemistry; Medical University of Warsaw; Faculty of Pharmacy; Banacha 1 Warsaw 02-097 Poland
| | - Patrycja Sliwerska
- Department of Inorganic and Analytical Chemistry; Medical University of Warsaw; Faculty of Pharmacy; Banacha 1 Warsaw 02-097 Poland
| | - Marcin Sobczak
- Department of Inorganic and Analytical Chemistry; Medical University of Warsaw; Faculty of Pharmacy; Banacha 1 Warsaw 02-097 Poland
| | - Bartlomiej Kraska
- Department of Inorganic Chemistry; Medical University of Gdansk; Al. Gen. J. Hallera 107 Gdansk 80-416 Poland
| | - Wojciech Kamysz
- Department of Inorganic Chemistry; Medical University of Gdansk; Al. Gen. J. Hallera 107 Gdansk 80-416 Poland
| | - Grzegorz Nalecz-Jawecki
- Department of Environmental Health Science; Medical University of Warsaw; Faculty of Pharmacy; Banacha 1 Warsaw 02-097 Poland
| | - Waclaw Kolodziejski
- Department of Environmental Health Science; Medical University of Warsaw; Faculty of Pharmacy; Banacha 1 Warsaw 02-097 Poland
| |
Collapse
|
10
|
Wicks RT, Azadi J, Mangraviti A, Zhang I, Hwang L, Joshi A, Bow H, Hutt-Cabezas M, Martin KL, Rudek MA, Zhao M, Brem H, Tyler BM. Local delivery of cancer-cell glycolytic inhibitors in high-grade glioma. Neuro Oncol 2014; 17:70-80. [PMID: 25053853 DOI: 10.1093/neuonc/nou143] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
BACKGROUND 3-bromopyruvate (3-BrPA) and dichloroacetate (DCA) are inhibitors of cancer-cell specific aerobic glycolysis. Their application in glioma is limited by 3-BrPA's inability to cross the blood-brain-barrier and DCA's dose-limiting toxicity. The safety and efficacy of intracranial delivery of these compounds were assessed. METHODS Cytotoxicity of 3-BrPA and DCA were analyzed in U87, 9L, and F98 glioma cell lines. 3-BrPA and DCA were incorporated into biodegradable pCPP:SA wafers, and the maximally tolerated dose was determined in F344 rats. Efficacies of the intracranial 3-BrPA wafer and DCA wafer were assessed in a rodent allograft model of high-grade glioma, both as a monotherapy and in combination with temozolomide (TMZ) and radiation therapy (XRT). RESULTS 3-BrPA and DCA were found to have similar IC50 values across the 3 glioma cell lines. 5% 3-BrPA wafer-treated animals had significantly increased survival compared with controls (P = .0027). The median survival of rats with the 50% DCA wafer increased significantly compared with both the oral DCA group (P = .050) and the controls (P = .02). Rats implanted on day 0 with a 5% 3-BrPA wafer in combination with TMZ had significantly increased survival over either therapy alone. No statistical difference in survival was noted when the wafers were added to the combination therapy of TMZ and XRT, but the 5% 3-BrPA wafer given on day 0 in combination with TMZ and XRT resulted in long-term survivorship of 30%. CONCLUSION Intracranial delivery of 3-BrPA and DCA polymer was safe and significantly increased survival in an animal model of glioma, a potential novel therapeutic approach. The combination of intracranial 3-BrPA and TMZ provided a synergistic effect.
Collapse
Affiliation(s)
- Robert T Wicks
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Javad Azadi
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Antonella Mangraviti
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Irma Zhang
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Lee Hwang
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Avadhut Joshi
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Hansen Bow
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Marianne Hutt-Cabezas
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Kristin L Martin
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Michelle A Rudek
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Ming Zhao
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Henry Brem
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| | - Betty M Tyler
- Department of Neurosurgery (R.T.W., J.A., A.M., I.Z., L.H., A.J., H.B., M.H.-C., K.L.M., H.B., B.M.T.); Departments of Oncology, Ophthalmology, and Biomedical Engineering, Johns Hopkins University School of Medicine, Baltimore, Maryland (H.B.); Division of Chemical Therapeutics, Department of Oncology, Sidney Kimmel Comprehensive Cancer Center at Johns Hopkins, Baltimore, Maryland (M.A.R., M.Z.)
| |
Collapse
|
11
|
Oh SH, Lee JH. Hydrophilization of synthetic biodegradable polymer scaffolds for improved cell/tissue compatibility. Biomed Mater 2013; 8:014101. [DOI: 10.1088/1748-6041/8/1/014101] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
|
12
|
Gautrot JE, Zhu XX. Biodegradable polymers based on bile acids and potential biomedical applications. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012. [DOI: 10.1163/156856206778530713] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
|
13
|
El Fray M, Czugala M. Polish artificial heart program. WILEY INTERDISCIPLINARY REVIEWS-NANOMEDICINE AND NANOBIOTECHNOLOGY 2011; 4:322-8. [DOI: 10.1002/wnan.175] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
|
14
|
Jaszcz K, Łukaszczyk J. Studies on hydrolytic degradation of poly(ester-anhydride)s based on oligosuccinate and aliphatic diacids. Polym Degrad Stab 2011. [DOI: 10.1016/j.polymdegradstab.2011.08.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
15
|
Schmeltzer RC, Johnson M, Griffin J, Uhrich K. Comparison of salicylate-based poly(anhydride-esters) formed via melt-condensation versus solution polymerization. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2009; 19:1295-306. [PMID: 18854123 DOI: 10.1163/156856208786052362] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Salicylate-based poly(anhydride-esters) were synthesized via two different methods, melt-condensation and solution polymerization, and the resulting polymers were compared. Acetylsalicylic acid was used as a model compound to mimic the active polymer chain-ends during melt-condensation, and formed a low-molecular-weight (<1500) polymer when subjected to melt-condensation polymerization conditions. The polymers and model compounds were analyzed by NMR ((1)H and (13)C) and IR spectroscopies to elucidate the structures. Spectroscopic analysis revealed the formation of a thermodynamically stable salicylate ester via salicylate-anhydride rearrangement during melt-condensation polymerization, which did not occur during solution polymerization. The salicylate-based poly(anhydride-esters) undergo a thermodynamic rearrangement during melt-condensation polymerization that is not observed for solution polymerization.
Collapse
Affiliation(s)
- Robert C Schmeltzer
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA
| | | | | | | |
Collapse
|
16
|
Carbone AL, Song M, Uhrich KE. Iodinated Salicylate-Based Poly(anhydride-esters) as Radiopaque Biomaterials. Biomacromolecules 2008; 9:1604-12. [DOI: 10.1021/bm8000759] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Ashley L. Carbone
- Department of Chemistry and Chemical Biology and Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey 08854-8087
| | - MinJung Song
- Department of Chemistry and Chemical Biology and Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey 08854-8087
| | - Kathryn E. Uhrich
- Department of Chemistry and Chemical Biology and Department of Biomedical Engineering, Rutgers University, Piscataway, New Jersey 08854-8087
| |
Collapse
|
17
|
|
18
|
Wan WK, Yang L, Padavan DT. Use of degradable and nondegradable nanomaterials for controlled release. Nanomedicine (Lond) 2007; 2:483-509. [PMID: 17716133 DOI: 10.2217/17435889.2.4.483] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Drug-delivery devices are fundamentally important in improving the pharmacological profiles of therapeutic molecules. Nanocontrolled-release systems are attracting a lot of attention currently owing to their large surface area and their ability to target delivery to specific sites in the human body. In addition, they can penetrate the cell membrane for gene, nucleic acid and bioactive peptide/protein delivery. Representative applications of nanodrug-delivery systems include controlled-release wound dressings, controlled-release scaffolds for tissue regeneration and implantable biodegradable nanomaterial-based medical devices integrated with drug-delivery functions. We review the present status and future perspectives of various types of nanocontrolled-release systems. Although many of the well-established degradable and nondegradable controlled-release vehicles are being investigated for their processing into nanocarriers, several new emerging nanomaterials are being studied for their controlled-release properties. The release of multiple bioactive agents, each with its own kinetic profile, is becoming possible. In addition, integration of the nanocontrolled-release systems with other desirable functions to create new, cross-discipline applications can also be realized.
Collapse
Affiliation(s)
- W K Wan
- University of Western Ontario, Biomedical Engineering Graduate Program, London, Ontario, Canada.
| | | | | |
Collapse
|
19
|
Gunatillake P, Mayadunne R, Adhikari R. Recent developments in biodegradable synthetic polymers. BIOTECHNOLOGY ANNUAL REVIEW 2006; 12:301-47. [PMID: 17045198 DOI: 10.1016/s1387-2656(06)12009-8] [Citation(s) in RCA: 181] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
This chapter reviews recent developments in biodegradable synthetic polymers focusing on tailoring polymer structures to meet material specification for emerging applications such as tissue engineered products and therapies. Major classes and new families of synthetic polymers are discussed with regard to synthesis, properties and biodegradability, and known degradation modes and products are summarized based on studies reported during the past 10-15 years. Polyesters and their copolymers, polyurethanes, polyphosphazenes, polyanhydrides, polycarbonates, polyesteramides and recently developed injectable polymer systems based on polypropylenefumarates, polyurethanes and acrylate/urethane systems are reviewed. Polyesters such as polyglycolides, polylactides and their copolymers still remain as the major class of synthetic biodegradable polymers with products in clinical use. Although various copolymerization methods have addressed needs of different applications, release of acidic degradation products, processing difficulties and limited range of mechanical properties remains as major disadvantages of this family of polymers. Injectable polymers based on urethane and urethane/acrylate have shown great promise in developing delivery systems for tissue engineered products and therapies.
Collapse
Affiliation(s)
- Pathiraja Gunatillake
- PolyNovo Biomaterials Pty Ltd, Bag 10, Clayton South, Bayview Avenue, Clayton 3169, Australia.
| | | | | |
Collapse
|
20
|
Jarmer DJ, Lengsfeld CS, Anseth KS, Randolph TW. Supercritical fluid crystallization of griseofulvin: crystal habit modification with a selective growth inhibitor. J Pharm Sci 2005; 94:2688-702. [PMID: 16258994 DOI: 10.1002/jps.20463] [Citation(s) in RCA: 37] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Poly (sebacic anhydride) (PSA) was used as a growth inhibitor to selectively modify habit of griseofulvin crystals formed via the Precipitation with a compressed-fluid antisolvent (PCA) process. PSA and griseofulvin were coprecipitated within a PCA injector, which provided efficient mixing between the solution and compressed antisolvent process streams. Griseofulvin crystal habit was modified from acicular to bipyramidal when the mass ratio of PSA/griseofulvin in the solution feed stream was <or=1:1. The habit modification was attributed to the preferential adsorption of PSA to the fastest growing crystal face of the acicular crystal form, which inhibited growth. Scanning electron microscopy (SEM) was used to characterize the griseofulvin and PSA particles, and gave results consistent with a selective growth inhibition mechanism. SEM micrographs showed regions on griseofulvin crystals where PSA microparticles had preferentially adsorbed. X-ray powder diffraction (XRPD) and differential scanning calorimetry (DSC) analysis of the griseofulvin crystals indicated no changes in the crystalline form after the habit modification. Powder compressibility decreased from 49 +/- 3% to 28 +/- 7% with the modification in crystal habit. No change in the physical stability of the processed powder was observed after being stored at 25 degrees C/60% RH and 40 degrees C/70% RH for 23 days. Despite the change in crystal habit, griseofulvin crystals achieved 100% dissolution within 60 min in a simulated gastric fluid.
Collapse
Affiliation(s)
- Daniel J Jarmer
- Department of Chemical and Biological Engineering, University of Colorado at Boulder, Center for Pharmaceutical Biotechnology, Boulder, Colorado, USA
| | | | | | | |
Collapse
|
21
|
Schmeltzer RC, Schmalenberg KE, Uhrich KE. Synthesis and Cytotoxicity of Salicylate-Based Poly(anhydride esters). Biomacromolecules 2005; 6:359-67. [PMID: 15638540 DOI: 10.1021/bm049544+] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
This paper describes the synthesis and cytotoxicity of poly(anhydride esters) that are composed of several salicylate derivatives, including halogenated salicylates, aminosalicylates, salicylsalicylic acid, and thiolsalicylic acid. The incorporation of these nonsteroidal antiinflammatory drugs (NSAIDs) into a biodegradable polymer backbone yields drug-based polymers that have potential for a variety of applications. The poly(anhydride esters) were synthesized by melt condensation polymerization. The halogenated salicylate derivatives yielded the highest molecular polymers as well as the highest glass transition temperatures. All polymers displayed in vitro degradation lag times from 1 to 3 days, depending on the water solubility of the salicylate derivative. Cell viability and proliferation were determined with L929 fibroblast cells in serum-containing medium to assess the polymer cytotoxicities, which varied as a function of the saliyclate chemistry. Cell morphology was normal for most of the polymers evaluated.
Collapse
Affiliation(s)
- Robert C Schmeltzer
- Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854, USA
| | | | | |
Collapse
|
22
|
Cheng G, Aponte MA, Ramı́rez CA. Cross-linked amino acid-containing polyanhydrides for controlled drug release applications. POLYMER 2004. [DOI: 10.1016/j.polymer.2004.03.035] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
23
|
SURFACE-ERODIBLE BIOMATERIALS FOR DRUG DELIVERY. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/s0065-2377(03)29006-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
|
24
|
Chan CK, Chu IM. Synthesis and characterization of highly branched poly(anhydride-co-glycol) with glycerin as branching agent. J Appl Polym Sci 2003. [DOI: 10.1002/app.12737] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|
25
|
Chan CK, Chu IM. Stability and depolymerization of poly(sebacic anhydride) under high moisture environment. J Appl Polym Sci 2003. [DOI: 10.1002/app.12192] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
26
|
Poshusta AK, Burdick JA, Mortisen DJ, Padera RF, Ruehlman D, Yaszemski MJ, Anseth KS. Histocompatibility of photocrosslinked polyanhydrides: a novel in situ forming orthopaedic biomaterial. J Biomed Mater Res A 2003; 64:62-9. [PMID: 12483697 DOI: 10.1002/jbm.a.10274] [Citation(s) in RCA: 35] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Cell-polymer interactions in subcutaneous and bony tissue were examined for a novel class of in situ forming and surface eroding polyanhydride networks. Specifically, photopolymerized disks of several polyanhydride compositions were implanted subcutaneously in rats, and the tissue was analyzed for an inflammatory response. The compositions elicited varied histological responses, ranging from highly active cell layers to moderate fibrous capsules, depending on the degrading polymer composition. Furthermore, one composition was photopolymerized in a model orthopaedic defect in the proximal tibia. The feasibility of photopolymerizing the methacrylated monomers in situ and the adherence of the photocrosslinked polyanhydride to the medullary canal were examined.
Collapse
Affiliation(s)
- Amy K Poshusta
- Department of Chemical Engineering, University of Colorado, Boulder, Colorado 80309-0424, USA
| | | | | | | | | | | | | |
Collapse
|
27
|
Abstract
Polyanhydrides have been considered to be useful biomaterials as carriers of drugs to various organs of the human body such as brain, bone, blood vessels, and eyes. They can be prepared easily from available, low cost resources and can be manipulated to meet desirable characteristics. Polyanhydrides are biocompatible and degrade in vivo into non-toxic diacid counterparts that are eliminated from the body as metabolites. Owing to their usefulness, this review focuses on the development, synthesis methods, structures and characterization of polyanhydrides, which will provide an overview for the researchers in the field. Their in vitro and in vivo degradability, toxicity, biocompatibility and applications are discussed in the subsequent chapters of this special issue on polyanhydrides and poly(ortho esters).
Collapse
Affiliation(s)
- Neeraj Kumar
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 91120, Israel
| | | | | |
Collapse
|
28
|
|
29
|
Shen E, Kipper MJ, Dziadul B, Lim MK, Narasimhan B. Mechanistic relationships between polymer microstructure and drug release kinetics in bioerodible polyanhydrides. J Control Release 2002; 82:115-25. [PMID: 12106982 DOI: 10.1016/s0168-3659(02)00125-6] [Citation(s) in RCA: 90] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Abstract
This work investigates the relationship between polymer microstructure and drug release kinetics in the bioerodible polyanhydride system, poly[(1,6-bis-p-carboxyphenoxy hexane)-co-(sebacic anhydride)] (CPH-SA). Model drugs, p-nitroaniline (PNA) and disperse yellow 3 (DY), were selected based on compatibility with CPH and SA, respectively. The polymer microstructure and compatibility of the drug with the constituent monomers were determined to have significant influence over the release kinetics of the drugs studied. Polymer systems with homogeneous microstructure, poly(SA) and 50:50 CPH-SA, showed simultaneous polymer degradation and drug release, although the solubility of the drug in the polymer influenced the shape of the release profiles. For the heterogeneous copolymers, 20:80 and 80:20 CPH-SA, individual monomer release kinetics demonstrated the effects of drug partitioning within a phase-separated microstructure. The PNA molecules partition preferentially into the CPH microdomains in the 20:80 CPH-SA copolymer while the DY molecules partition preferentially into the SA microdomains in the 80:20 CPH-SA copolymer. These studies suggest that the drug release mechanism is driven by polymer microstructure, compatibility of the drug with the constituent polymer phases, and solubility of the drug within the polymer. A thorough understanding of drug-polymer interactions as well as the polymer microstructure will pave the way for more accurate predictions of drug release from bioerodible polyanhydrides.
Collapse
Affiliation(s)
- Elizabeth Shen
- Department of Chemical and Biochemical Engineering, Rutgers, The State University of New Jersey, 98 Brett Road, Piscataway, NJ 08854-8058, USA
| | | | | | | | | |
Collapse
|
30
|
Pharmaceutical Polymeric Controlled Drug Delivery Systems. FILLED ELASTOMERS DRUG DELIVERY SYSTEMS 2002. [DOI: 10.1007/3-540-45362-8_2] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/10/2023]
|
31
|
Vasheghani-Farahani E, Khorram M. Hydrophilic drug release from bioerodible polyanhydride microspheres. J Appl Polym Sci 2001. [DOI: 10.1002/app.10007] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
|
32
|
Burkoth AK, Anseth KS. A review of photocrosslinked polyanhydrides: in situ forming degradable networks. Biomaterials 2000; 21:2395-404. [PMID: 11055287 DOI: 10.1016/s0142-9612(00)00107-1] [Citation(s) in RCA: 145] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
Many orthopaedic injuries could benefit from a high-strength and degradable material with good tissue compatibility. In addition, there is a great clinical need for materials which are easily contoured or placed into complex-shaped defects by a surgeon. We have rationally designed a new class of photocrosslinkable polyanhydride monomers which in situ form high-strength and surface eroding networks of complex geometries. This paper highlights the advantages of these materials for orthopaedic applications and the technique of photopolymerization for reacting these monomers under physiological conditions. The rationale for the material design, photopolymerization kinetics, degradation behavior, and histology in subcutaneous tissue and a model bone defect are presented.
Collapse
Affiliation(s)
- A K Burkoth
- Department of Chemical Engineering, University of Colorado Campus Box 424, Boulder 80309-0424, USA
| | | |
Collapse
|
33
|
Krishnan M, Flanagan DR. FTIR-ATR spectroscopy for monitoring polyanhydride/anhydride-amine reactions. J Control Release 2000; 69:273-81. [PMID: 11064134 DOI: 10.1016/s0168-3659(00)00312-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
The reactivity of 1,3-bis(p-carboxyphenoxy) propane:sebacic acid anhydride copolymer (CPPSA1:6), myristic and benzoic anhydrides with amine nucleophiles were investigated in non-polar solvents. FTIR-ATR (attenuated total reflectance) spectroscopy was used to monitor the polyanhydride/anhydride reaction rates in dichloromethane, dichloroethane, chloroform, and 1,4-dioxane solutions at room temperature. The reaction kinetics was determined by measuring the anhydride peak loss with time. Aminolysis resulted from nucleophilic attack of the added amine on the carbonyl group of the anhydride moiety. Primary and secondary amines reacted to form amides and the reaction followed second-order kinetics. Second-order rate constants and reaction half-life (t(1/2)) were calculated from the semilog plots of [anhydride]/[amine] in 1,4-dioxane at room temperature. The aminolysis rate decreased with pK(a) of the amine reactant, and half-life (t(1/2)) decreased with increasing amine concentration, as expected. With trifluoroethylamine (pK(a) 5.8), myristic anhydride reacted about 6-fold faster than benzoic anhydride. The lower reaction rate of benzoic anhydride was due to the higher stability of the aromatic anhydride compared to aliphatic. The overall CPPSA1:6 copolymer reactivity was the sum of aliphatic-aliphatic (SA-SA), aliphatic-aromatic (SA-CPP), and aromatic-aromatic (CPP-CPP) anhydride linkage reactivities. Based on the monomer ratio, the probability of SA-SA, SA-CPP, and CPP-CPP dyads were calculated to be 0.74, 0.24, and 0.02, respectively. This indicated that CPPSA1:6 reactivity will mainly result from SA-SA and SA-CPP linkages. The second-order rate constants and t(1/2) obtained for CPPSA1:6 with TFEA were closer to those for myristic anhydride than benzoic anhydride with TFEA.
Collapse
Affiliation(s)
- M Krishnan
- Division of Pharmaceutics, College of Pharmacy, University of Iowa, Iowa City, IA 52242, USA
| | | |
Collapse
|
34
|
Burkoth AK, Burdick J, Anseth KS. Surface and bulk modifications to photocrosslinked polyanhydrides to control degradation behavior. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 2000; 51:352-9. [PMID: 10880076 DOI: 10.1002/1097-4636(20000905)51:3<352::aid-jbm8>3.0.co;2-c] [Citation(s) in RCA: 82] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
A unique class of surface-eroding polyanhydrides was developed and explored for use in medical applications requiring high-strength biomaterials (e.g., orthopedics). In particular, dimethacrylated anhydride monomers were synthesized that photopolymerize quickly to render densely crosslinked polymer networks that degrade from the surface only by hydrolysis of labile anhydride linkages. Previous research on these materials has shown that the rate of hydrolysis of the degradable linkages is dependent on the hydrophobicity of the network composition. This article demonstrates the versatility in controlling the degradation process and resulting cellular response in these materials through the incorporation of new chemistries and the formation of polymer-polymer composite structures. Specifically, the rate of mass loss was controlled by the addition of hydrophobic linear polymers [e.g., poly(methyl methacrylate)] or monovinyl monomers based on hydrophobic natural components (e.g., cholesterol, steric acid). In addition, a newly established photografting method was used to modify the network surface chemistry with cholesterol- and stearic acid-based polymer grafts to control the degradation front and cellular interactions at the polymer-tissue interface. Finally, a porogen leaching method was used to form porous polyanhydride constructs, which can be subsequently filled with osteoblasts photoencapsulated in a hydrogel, as potential synthetic allograft materials for tissue engineering bone.
Collapse
Affiliation(s)
- A K Burkoth
- Department of Chemical Engineering, University of Colorado, Boulder, Colorado 80309-0424, USA
| | | | | |
Collapse
|
35
|
Abstract
Various butorphanol-loaded microparticles have been prepared with a biodegradable copolymer P(FAD-SA) of erucic acid dimer (FAD) and sebacic acid (SA) and a copolymer P(CPP-SA) of carboxyphenoxypropane (CPP) and SA using a melt compounding and milling method. Drug release was measured in vitro following incubation of drug-loaded microparticles in water for injection at 37 degrees C. It was found that butorphanol was released in a sustained manner, yielding a cumulative drug release of about 100% over a period of 48 hr. Also, drug release was affected by drug loading and the size of the microparticles; however, it was not significantly influenced by the copolymer composition. Scanning electron microscopic (SEM) results showed that most of the particles were irregular in shape with uneven surfaces. The molecular weights of the copolymers were not changed after this fabrication process. In addition, 20% butorphanol-encapsulated microspheres were prepared with copolymer P(FAD-SA) by spray-drying. The SEM micrograph shows that the particle sizes of the microspheres ranged from 2 to 10 microns, and the external surfaces appear smooth. Moreover, rapid drug release was observed for these microspheres, with more than 92% of the encapsulated drug released within the first 2 hr.
Collapse
Affiliation(s)
- H C Chang
- Abbott Laboratories, Department 97d, Abbott Park, IL 60064-3500, USA
| | | |
Collapse
|
36
|
Muggli DS, Burkoth AK, Anseth KS. Crosslinked polyanhydrides for use in orthopedic applications: degradation behavior and mechanics. JOURNAL OF BIOMEDICAL MATERIALS RESEARCH 1999; 46:271-8. [PMID: 10380006 DOI: 10.1002/(sici)1097-4636(199908)46:2<271::aid-jbm17>3.0.co;2-x] [Citation(s) in RCA: 139] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
High-strength, surface-eroding polymers were synthesized from methacrylated anhydride monomers of sebacic acid (MSA) and 1,6-bis(carboxyphenoxy) hexane (MCPH). These multifunctional monomers were photopolymerized using ultraviolet light to produce highly crosslinked polyanhydride networks. Through this approach, the crosslinking density of the resulting polymer network was used to control the final mechanical properties, while the degradation time scale was controlled by the chemical composition of the network. The combined hydrophobicity of the polymer backbone with the hydrolytically labile anhydride linkages led to surface-eroding networks, as confirmed by linear cumulative mass loss profiles as a function of degradation time for crosslinked polymer disks. By copolymerizing varying amounts of MSA and MCPH, the degradation rate of the final network was controlled from 2 days to 1 year. The tensile modulus of crosslinked poly(MSA) (1.4 GPa) was nearly an order of magnitude larger than that of linear poly(sebacic acid). In general, the mechanical properties of the crosslinked polyanhydrides networks were within ranges of those reported for cortical and trabecular bone. However, unlike bulk degrading polyesters such as poly(lactic acid), these surface eroding networks maintained >70% of their tensile modulus with 50% mass degradation.
Collapse
Affiliation(s)
- D S Muggli
- Department of Chemical Engineering, University of Colorado, Boulder 80309-0424, USA
| | | | | |
Collapse
|
37
|
Burkoth AK, Anseth KS. MALDI-TOF Characterization of Highly Cross-Linked, Degradable Polymer Networks. Macromolecules 1999. [DOI: 10.1021/ma9814651] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Amy K. Burkoth
- Department of Chemical Engineering, University of Colorado, Boulder, Colorado 80309-0424
| | - Kristi S. Anseth
- Department of Chemical Engineering, University of Colorado, Boulder, Colorado 80309-0424
| |
Collapse
|
38
|
Liu W, Lee HK. Degradation study of unsaturated anhydrides by reversed-phase high-performance liquid chromatography. J Chromatogr A 1998. [DOI: 10.1016/s0021-9673(97)01269-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
39
|
Chen X, McGurk SL, Davies MC, Roberts CJ, Shakesheff KM, Tendler SJB, Williams PM, Davies J, Dawkes AC, Domb A. Chemical and Morphological Analysis of Surface Enrichment in a Biodegradable Polymer Blend by Phase-Detection Imaging Atomic Force Microscopy. Macromolecules 1998. [DOI: 10.1021/ma9704525] [Citation(s) in RCA: 69] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
40
|
KRICHELDORF HR, GOMOURACHVILI Z. Polyanhydrides. XI. Poly(Ester-anhydride)s Derived from 4-Hydroxybenzoic Acid, Vanillic Acid, and Aliphatic Dicarboxylic Acids. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 1998. [DOI: 10.1080/10601329808001982] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
41
|
Analysis of some anhydrides as their corresponding acids by capillary electrophoresis. Chromatographia 1997. [DOI: 10.1007/bf02490932] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
|
42
|
Thomas P, Padmaja T, Kulkarni M. Polyanhydride blend microspheres: novel carriers for the controlled release of macromolecular drugs. J Control Release 1997. [DOI: 10.1016/s0168-3659(96)01497-6] [Citation(s) in RCA: 22] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
|
43
|
Mylonas C, Tabata Y, Langer R, Zohar Y. Preparation and evaluation of polyanhydride microspheres containing gonadotropin-releasing hormone (GnRH), for inducing ovulation and spermiation in fish. J Control Release 1995. [DOI: 10.1016/0168-3659(95)00009-w] [Citation(s) in RCA: 52] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
|
44
|
Maniar M, Domb A, Haffer A, Shah J. Controlled release of a local anesthetic from fatty acid dimer based polyanhydride. J Control Release 1994. [DOI: 10.1016/0168-3659(94)90029-9] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
|
45
|
|
46
|
Abstract
Significant opportunities and challenges exist in the creation and characterization of biomaterials. Materials have been designed for contact with blood, as replacements for soft and hard tissues, as adhesives, and as dental materials. Current methods of synthesis and characterization of these materials are outlined. Approaches for controlling the interface between tissue and biomaterials and ways in which the engineered materials may contribute to medicine are considered.
Collapse
Affiliation(s)
- N A Peppas
- School of Chemical Engineering, Purdue University, West Lafayette, IN 47907-1283
| | | |
Collapse
|