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Avraham Y, Shapira-Furman T, Saklani R, Van Heukelom B, Carmel M, Vorobiev L, Lipsker L, Zwas DR, Berry EM, Domb AJ. Sustained insulin treatment restoring metabolic status, body weight, and cognition in an anorexia nervosa-like animal model in mice. Behav Brain Res 2024; 466:115001. [PMID: 38642861 DOI: 10.1016/j.bbr.2024.115001] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2023] [Revised: 04/12/2024] [Accepted: 04/13/2024] [Indexed: 04/22/2024]
Abstract
INTRODUCTION Anorexia Nervosa (AN) is a psycho-socio-biological disease characterized by severe weight loss as result of dieting and hyperactivity. Effective treatments are scarce, despite its significant prevalence and mortality. AN patients show lower basal insulin levels and increased metabolic clearance, leading to weight loss, cognitive deficits, and hormonal imbalances. Low-dose polymer insulin could potentially reverse these effects by restoring brain function, reducing fear of weight gain, encouraging food intake, and restoring fat depots. This study evaluates an insulin delivery system designed for sustained release and AN treatment. METHODS AN-like model was established through dietary restriction (DR). On days 1-25, mice were on DR, and on days 26-31 they were on ad libitum regimen. An insulin-loaded delivery system was administered subcutaneously (1% w/w insulin). The impact of insulin treatment on gene expression in the hippocampus (cognition, regulation of stress, neurogenesis) and hypothalamus (eating behavior, mood) was assessed. Behavioral assays were conducted to evaluate motor activity and cognitive function. RESULTS The delivery system demonstrated sustained insulin release, maintaining therapeutic plasma levels. Diet restriction mice treated with the insulin delivery system showed body weight restoration. Gene expression analysis revealed enhanced expression of CB1 and CB2 genes associated with improved eating behavior and cognition, while POMC expression was reduced. Insulin-polymer treatment restored cognitive function and decreased hyperactivity in the AN-like model. CONCLUSION The PSA-RA-based insulin delivery system effectively restores metabolic balance, body weight, and cognitive function in the AN model. Its ability to steadily release insulin makes it a promising candidate for AN treatment."
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Affiliation(s)
- Yosefa Avraham
- Department of Metabolism and Human Nutrition, Braun School of Public Health, Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel.
| | - Tovi Shapira-Furman
- Institute of Drug Research, School of Pharmacy Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
| | - Ravi Saklani
- Institute of Drug Research, School of Pharmacy Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
| | - Bob Van Heukelom
- Department of Neurology, Gelderse Vallei Hospital, 6716 RP, the Netherlands
| | - Moshe Carmel
- Department of Metabolism and Human Nutrition, Braun School of Public Health, Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
| | - Lia Vorobiev
- Department of Metabolism and Human Nutrition, Braun School of Public Health, Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
| | - Leah Lipsker
- Department of Metabolism and Human Nutrition, Braun School of Public Health, Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
| | - Donna R Zwas
- Linda Joy Pollin Cardiovascular Wellness Center for Women, Heart Institute, Hadassah University Medical Center, Jerusalem, Israel
| | - Elliot M Berry
- Department of Metabolism and Human Nutrition, Braun School of Public Health, Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
| | - Abraham J Domb
- Institute of Drug Research, School of Pharmacy Hadassah-Hebrew University Medical School, Jerusalem 91120, Israel
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Arun Y, Ghosh R, Domb AJ. Poly(ester-anhydrides) Derived from Esters of Hydroxy Acid and Cyclic Anhydrides. Biomacromolecules 2022; 23:3417-3428. [PMID: 35881559 PMCID: PMC9516692 DOI: 10.1021/acs.biomac.2c00542] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
![]()
The alternating architecture and hydrophobic side chains
hinder
hydrolytic cleavage and anhydride interchange in poly(sebacic acid-ricinoleic
acid) (P(SA-RA)), which provides stable polyanhydrides at room temperature.
In this report, a series of polyanhydrides were designed to investigate
the effect of ester bonds, hydrophobic side chains, phenyl moieties,
and their distance from anhydride bonds on their stability and properties.
Polyanhydrides with alternating architecture are constructed by the
polymerization of ester-diacids prepared from ricinoleic or other
hydroxy acids with anhydrides such as succinic, maleic, and phthalic
anhydrides. The hydrophobic side chains are designed closer to anhydride
bonds to investigate hindrance to hydrolytic cleavage and anhydride
interchange. Polyanhydrides were obtained by the activation of ester-diacid
using acetic anhydride followed by melt condensation. The reactions
were monitored by NMR, Fourier transform infrared (FTIR), and gel
permeation chromatography (GPC). The synthesized poly(ester-anhydride)s
with a shorter chain length compared to P(SA-RA) were stable at room
temperature. The hydrolytic degradation studies reveal that the phenyl
moiety present in poly(ricinoleic acid phthalate) (PRAP) and poly(hydroxystearic
acid phthalate) (PHSAP) reduces the hydrolysis of anhydride bonds.
Poly(hydroxyoctanoic acid succinate) (PHOAS) demonstrates the highest
molecular weight of all tested polymers. The results reveal that the
presence of hydrophobic side chains, phenyl moieties, and their distance
from anhydride bonds significantly improves the stability. These stable
polyanhydrides can provide convenience to use in control drug-delivery
applications. The in vitro drug release study using
ibuprofen shows that polymers with aromatic units such as PRAP and
PHSAP establish sustained release, which presents more than 50 and
40% of ibuprofen over a period of 28 days.
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Affiliation(s)
- Yuvaraj Arun
- The Alex Grass Center for Drug Design & Synthesis and the Center for Cannabis Research, School of Pharmacy, Institute of Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel
| | - Radhakanta Ghosh
- The Alex Grass Center for Drug Design & Synthesis and the Center for Cannabis Research, School of Pharmacy, Institute of Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel
| | - Abraham J Domb
- The Alex Grass Center for Drug Design & Synthesis and the Center for Cannabis Research, School of Pharmacy, Institute of Drug Research, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem 9112001, Israel
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Cakir Hatir P. Light‐induced
hydrogels derived from poly(ethylene glycol) and acrylated methyl ricinoleate as biomaterials. J Appl Polym Sci 2022. [DOI: 10.1002/app.52754] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Affiliation(s)
- Pinar Cakir Hatir
- Department of Biomedical Engineering, Faculty of Engineering and Natural Sciences Istinye University Istanbul Turkey
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Ramot Y, Steiner M, Amouyal N, Lavie Y, Klaiman G, Domb AJ, Nyska A, Hagigit T. Treatment of contaminated radial fracture in Sprague-Dawley rats by application of a degradable polymer releasing gentamicin. J Toxicol Pathol 2020; 34:11-22. [PMID: 33627941 PMCID: PMC7890171 DOI: 10.1293/tox.2020-0041] [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: 06/15/2020] [Accepted: 08/06/2020] [Indexed: 01/19/2023] Open
Abstract
Fracture-related infections remain a leading cause of morbidity and mortality. We aimed to establish a simple contaminated radial osteotomy model to assess the efficacy of a biodegradable polymer poly(sebacic-co-ricinoleic acid) [p(SA-RA)] containing 20% w/w gentamicin. A unilateral transverse osteotomy was induced in Sprague-Dawley (SD) rats, followed by application of Staphylococcus aureus suspension over the fracture. After successfully establishing the contaminated open fracture model, we treated the rats either systemically (intraperitoneal cefuroxime), locally with p(SA-RA) containing gentamicin, or both. Control groups included non-contaminated group and contaminated groups that were either untreated or treated with the polymer alone. After 4 weeks, the bones were subjected to micro-CT scanning and microbiological and histopathology evaluations. Micro-CT analysis revealed similar changes in the group subjected to both local and systemic treatment as in the non-contaminated control group. Lack of detectable bacterial growth was noted in most animals of the group subjected to both local and systemic treatment, and all samples were negative for S. aureus. Histopathological evaluation revealed that all treatment modalities containing antibiotics were highly effective in reducing infection and promoting callus repair, resulting in early bone healing. While p(SA-RA) containing gentamicin treatment showed better results than cefuroxime, the combination of local and systemic treatment displayed the highest therapeutic potential in this model.
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Affiliation(s)
- Yuval Ramot
- Faculty of Medicine, The Hebrew University of Jerusalem, Israel; The Department of Dermatology, Hadassah Medical Center, POB 12000, Jerusalem, 9112001, Israel
| | - Michal Steiner
- Envigo CRS (Israel), Einstein Street, 13B, P.O.B 4019, Science Park, Ness Ziona, Israel
| | - Netanel Amouyal
- Envigo CRS (Israel), Einstein Street, 13B, P.O.B 4019, Science Park, Ness Ziona, Israel
| | - Yossi Lavie
- Envigo CRS (Israel), Einstein Street, 13B, P.O.B 4019, Science Park, Ness Ziona, Israel
| | - Guy Klaiman
- Envigo CRS (Israel), Einstein Street, 13B, P.O.B 4019, Science Park, Ness Ziona, Israel
| | - Abraham J Domb
- Institute of Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, POB 12000, Jerusalem, 9112001 Israel
| | - Abraham Nyska
- Consultant in Toxicologic Pathology, Tel Aviv and Tel Aviv University, Yehuda HaMaccabi 31, Tel Aviv, 6200515, Israel
| | - Tal Hagigit
- Dexcel Pharma Technologies Ltd., 1 Dexcel St., Or-Akiva, 3060000, Israel
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Rajalakshmi P, Marie JM, Maria Xavier AJ. Castor oil-derived monomer ricinoleic acid based biodegradable unsaturated polyesters. Polym Degrad Stab 2019. [DOI: 10.1016/j.polymdegradstab.2019.109016] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
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6
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Synthesis and characterisation of platinum(IV) polypyridyl complexes with halide axial ligands. Inorganica Chim Acta 2019. [DOI: 10.1016/j.ica.2019.118964] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Zhou S, Sun W, Zhai Y. Amphiphilic block copolymer NPs obtained by coupling ricinoleic acid/sebacic acids and mPEG: Synthesis, characterization, and controlled release of paclitaxel. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2018; 29:2201-2217. [PMID: 30285542 DOI: 10.1080/09205063.2018.1532136] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
Abstract
Currently, nanoparticles (NPs) made of amphiphilic block copolymer are still an essential part of drug delivery system. Here, we report a novel amphiphilic block copolymer and paclitaxel (PTX)-loaded copolymer NPs for the controlled delivery of PTX. The block copolymer was synthesized via melt polycondensation method of methoxy poly(ethylene glycol) (mPEG), sebacic acid (SA) and ricinoleic acid (RA). A series of characterization approaches such as Fourier Transform Infrared Spectroscopy (FTIR), 1Hydrogen-Nuclear Magnetic Resonance (1H-NMR), Differential Scanning Calorimetry (DSC), X-Ray Diffraction (XRD) and Gel Permeation Chromatography (GPC) applied have shown that the amphiphilic block copolymer was prepared as designed. NPs prepared by nanoprecipitation method consist of mPEG segments as the hydrophilic shell and RA-SA segments as the hydrophobic core, hydrophobic PTX was encapsulated as model drug. Subsequently, Transmission Electron Microscopy (TEM) analysis indicated that the spherical NPs have effective mean diameters ranging from 100 to 400 nm. Dynamic Light Scattering (DLS) analysis also revealed the controllable NPs diameter by modulating the mass ratio of RA to SA and drug loading amount (DLA). Besides, biphasic profile with zero order drug release was observed in general in vitro release behaviors of PTX from NPs. Further investigation confirmed that the release behaviors depend on the crystallinity of hydrophobic RA-SA segments. Results above suggest that NPs with amphiphlic block copolymer mPEG-b-P(RA-SA)-b-mPEG have a remarkable potential as a carrier for hydrophobic drug delivery in cancer therapy.
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Affiliation(s)
- Shiya Zhou
- a School of Pharmacy , Shenyang Pharmaceutical University , Shenyang , China
| | - Wei Sun
- b School of Medical Devices , Shenyang Pharmaceutical University , Shenyang , China
| | - Yinglei Zhai
- b School of Medical Devices , Shenyang Pharmaceutical University , Shenyang , China
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8
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Basu A, Domb AJ. Recent Advances in Polyanhydride Based Biomaterials. ADVANCED MATERIALS (DEERFIELD BEACH, FLA.) 2018; 30:e1706815. [PMID: 29707879 DOI: 10.1002/adma.201706815] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/21/2017] [Revised: 01/18/2018] [Indexed: 06/08/2023]
Abstract
This review focusses on recent developments of polyanhydrides, a class of degradable synthetic biopolymers. Polyanhydrides have been used as carriers for controlled delivery of drugs. A polyanhydride copolymer of carboxyphenoxy propane and sebacic acid has been used in Gliadel brain tumor implants for the controlled delivery of carmustine or bis-chloroethylnitrosourea. They are easy and inexpensive to synthesize (especially scale up). However, polyanhydrides possess a short shelf-life. Hydrolytic cleavage and anhydride interchanges lower their molecular weights during storage. One of the highlights in recent developments of polyanhydride chemistry is the discovery of alternating copolymers having extended shelf-life. Other highlights include their applications in biomedical electronics, vaccine delivery, and nano/micro particulate delivery systems. This review examines approaches for polyanhydride synthesis followed by their recent developments in biomedical applications.
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Affiliation(s)
- Arijit Basu
- School of Pharmacy - Faculty of Medicine, The Hebrew University of Jerusalem, Hadassah Ein Kerem Medical Center Campus, Jerusalem, 91120, Israel
- Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, Room No. 617, 500, Main Street, MA, 02131, USA
| | - Abraham J Domb
- School of Pharmacy - Faculty of Medicine, The Hebrew University of Jerusalem, Hadassah Ein Kerem Medical Center Campus, Jerusalem, 91120, Israel
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9
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Popilski H, Abtew E, Schwendeman S, Domb A, Stepensky D. Efficacy of paclitaxel/dexamethasone intra-tumoral delivery in treating orthotopic mouse breast cancer. J Control Release 2018; 279:1-7. [PMID: 29654797 DOI: 10.1016/j.jconrel.2018.04.010] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2017] [Revised: 03/30/2018] [Accepted: 04/06/2018] [Indexed: 12/12/2022]
Abstract
The effect of topical co-administration of promoter drugs with paclitaxel to increase anti-tumor effects of paclitaxel was investigated. Mice with orthotopic 4T1-Luc breast cancer received single intra-tumoral injection of a polymeric formulation with paclitaxel and a specific promoter drug. Several promoter drugs were evaluated, including: dexamethasone, losartan, nicotinamide, Azone, and oleic acid. Dexamethasone exhibited the highest effect on paclitaxel anti-tumor activity, in a dose-dependent fashion. However, this effect was accompanied by systemic effects of dexamethasone, and inability to prevent tumor metastasis to the lungs. Topical co-administration of promoter drugs with anti-cancer agents can enhance their anti-tumor effects. Further investigations are needed to identify the most efficient combinations of promoter and anti-cancer drugs, and their suitability for the clinical management of the breast cancer disease.
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Affiliation(s)
- Hen Popilski
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Esther Abtew
- Institute of Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Steven Schwendeman
- Department of Pharmaceutical Sciences and Department of Biomedical Engineering, University of Michigan, Ann Arbor, MI, USA
| | - Abraham Domb
- Institute of Drug Research, School of Pharmacy-Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - David Stepensky
- Department of Clinical Biochemistry and Pharmacology, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva, Israel.
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10
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Gold D, Alian M, Domb A, Karawani Y, Jbarien M, Chollet J, Haynes RK, Wong HN, Buchholz V, Greiner A, Golenser J. Elimination of Schistosoma mansoni in infected mice by slow release of artemisone. INTERNATIONAL JOURNAL FOR PARASITOLOGY-DRUGS AND DRUG RESISTANCE 2017; 7:241-247. [PMID: 28511056 PMCID: PMC5430492 DOI: 10.1016/j.ijpddr.2017.05.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 05/01/2017] [Accepted: 05/04/2017] [Indexed: 12/16/2022]
Abstract
The current treatment of schistosomiasis is based on the anti-helminthic drug praziquantel (PZQ). PZQ affects only the adult stages of schistosomes. In addition, resistance to PZQ is emerging. We suggest a drug, which could serve as a potential alternative or complement to PZQ, and as a means of treating infections at earlier, pre-granuloma stage. Derivatives of the peroxidic antimalarial drug artemisinin have been indicated as alternatives, because both plasmodia and schistosomes are blood-feeding parasites. The mechanism of action of artemisinins is related to oxidative effects of the artemisinins on intracellular reductants leading to formation of cytotoxic reactive oxygen species. We used artemisone, which has improved pharmacokinetics and anti-plasmodial activity, and reduced toxicity compared to other artemisinins in clinical use against malaria. We infected adult mice by subcutaneous injection of S. mansoni cercariae (about 200) and treated them at various times post infection by the following methods: i. artemisone suspension administered by gavage (400-450 mg/kg); ii. subcutaneous injection of a gel containing a known concentration of artemisone (115-120 mg/kg); iii. subcutaneous insertion of the drug incorporated in a solid polymer (56-60 mg/kg); iv. intraperitoneal injection of the drug solubilized in DMSO (115-120 mg/kg). Drug administration in polymers was performed to enable slow release of the artemisone that was verified in vivo and in vitro bioassays using drug-sensitive malaria parasites. We found superior strong anti-schistosome effects up to a total reduction of worm number, mainly following repetitive treatments with the drug absorbed in the polymers (73.1% and 95.9% reduction in mice treated with artemisone in gel 7 and 14, and 21, 28 and 35 days post infection, respectively). The results indicate that artemisone has a potent anti-schistosome activity. Its main importance in this context is its effectiveness in treating hosts harboring juvenile schistosomes, before egg-deposition and induction of deleterious immune responses.
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Affiliation(s)
- Daniel Gold
- Department of Clinical Microbiology and Immunology, Sackler Faculty of Medicine, Tel Aviv University, Israel
| | - Mohammed Alian
- School of Pharmacy, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Avraham Domb
- School of Pharmacy, Faculty of Medicine, Hebrew University of Jerusalem, Israel
| | - Yara Karawani
- The Kuvin Center for the Study of Infectious and Tropical Diseases, The Department of Microbiology and Molecular Genetics, Hebrew University of Jerusalem-Hadassah Medical School, Israel
| | - Maysa Jbarien
- The Kuvin Center for the Study of Infectious and Tropical Diseases, The Department of Microbiology and Molecular Genetics, Hebrew University of Jerusalem-Hadassah Medical School, Israel
| | - Jacques Chollet
- Swiss Tropical Institute, P.O. Box, CH-4002 Basel, Switzerland
| | - Richard K Haynes
- Centre of Excellence for Pharmaceutical Sciences, School of Health Sciences, North-West University, Potchefstroom 2520, South Africa
| | - Ho Ning Wong
- Centre of Excellence for Pharmaceutical Sciences, School of Health Sciences, North-West University, Potchefstroom 2520, South Africa
| | - Viola Buchholz
- Macromolecular Chemistry II, University of Bayreuth, Germany
| | - Andreas Greiner
- Macromolecular Chemistry II, University of Bayreuth, Germany
| | - Jacob Golenser
- The Kuvin Center for the Study of Infectious and Tropical Diseases, The Department of Microbiology and Molecular Genetics, Hebrew University of Jerusalem-Hadassah Medical School, Israel.
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Sun J, Aly KI, Kuckling D. Synthesis of hyperbranched polymers from vegetable oil based monomers via ozonolysis pathway. ACTA ACUST UNITED AC 2017. [DOI: 10.1002/pola.28600] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Jingjiang Sun
- Chemistry Department; University of Paderborn; Warburger Str. 100 Paderborn D-33098 Germany
| | - Kamal I. Aly
- Chemistry Department; Faculty of Science, Assiut University; Polymer Lab. 122 Assiut 71516 Egypt
| | - Dirk Kuckling
- Chemistry Department; University of Paderborn; Warburger Str. 100 Paderborn D-33098 Germany
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12
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Eckhard LH, Houri-Haddad Y, Sol A, Zeharia R, Shai Y, Beyth S, Domb AJ, Bachrach G, Beyth N. Sustained Release of Antibacterial Lipopeptides from Biodegradable Polymers against Oral Pathogens. PLoS One 2016; 11:e0162537. [PMID: 27606830 PMCID: PMC5015835 DOI: 10.1371/journal.pone.0162537] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/02/2016] [Accepted: 08/24/2016] [Indexed: 11/24/2022] Open
Abstract
The development of antibacterial drugs to overcome various pathogenic species, which inhabit the oral cavity, faces several challenges, such as salivary flow and enzymatic activity that restrict dosage retention. Owing to their amphipathic nature, antimicrobial peptides (AMPs) serve as the first line of defense of the innate immune system. The ability to synthesize different types of AMPs enables exploitation of their advantages as alternatives to antibiotics. Sustained release of AMPs incorporated in biodegradable polymers can be advantageous in maintaining high levels of the peptides. In this study, four potent ultra-short lipopeptides, conjugated to an aliphatic acid chain (16C) were incorporated in two different biodegradable polymers: poly (lactic acid co castor oil) (PLACO) and ricinoleic acid-based poly (ester-anhydride) (P(SA-RA)) for sustained release. The lipopeptide and polymer formulations were tested for antibacterial activity during one week, by turbidometric measurements of bacterial outgrowth, anti-biofilm activity by live/dead staining, biocompatibility by hemolysis and XTT colorimetric assays, mode of action by fluorescence-activated cell sorting (FACS) and release profile by a fluorometric assay. The results show that an antibacterial and anti-biofilm effect, as well as membrane disruption, can be achieved by the use of a formulation of lipopeptide incorporated in biodegradable polymer.
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Affiliation(s)
- Lea H. Eckhard
- Department of Prosthodontics, the Hebrew University–Faculty of Dental Medicine, Jerusalem, Israel
| | - Yael Houri-Haddad
- Department of Prosthodontics, the Hebrew University–Faculty of Dental Medicine, Jerusalem, Israel
| | - Asaf Sol
- Institute of Dental Science, the Hebrew University–Faculty of Dental Medicine, Jerusalem, Israel
| | - Rotem Zeharia
- Department of Prosthodontics, the Hebrew University–Faculty of Dental Medicine, Jerusalem, Israel
| | - Yechiel Shai
- Department of Biological Chemistry, the Weizmann Institute of Science, Rehovot, Israel
| | - Shaul Beyth
- Orthopedic Surgery Department, Hadassah Medical Center, Jerusalem, Israel
| | - Abraham J. Domb
- Institute for Drug Research, School of Pharmacology, Faculty of Medicine, the Hebrew University, Jerusalem, Israel
| | - Gilad Bachrach
- Institute of Dental Science, the Hebrew University–Faculty of Dental Medicine, Jerusalem, Israel
| | - Nurit Beyth
- Department of Prosthodontics, the Hebrew University–Faculty of Dental Medicine, Jerusalem, Israel
- * E-mail:
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Valencia D, Dantas L, Lara A, García J, Rivera Z, Rosas J, Bertotti M. Development of a bio-electrochemical immunosensor based on the immobilization of SPINNTKPHEAR peptide derived from HPV-L1 protein on a gold electrode surface. J Electroanal Chem (Lausanne) 2016. [DOI: 10.1016/j.jelechem.2016.03.040] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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14
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Haim-Zada M, Basu A, Hagigit T, Schlinger R, Grishko M, Kraminsky A, Hanuka E, Domb AJ. Alternating Poly(ester-anhydride) by Insertion Polycondensation. Biomacromolecules 2016; 17:2253-9. [PMID: 27198864 DOI: 10.1021/acs.biomac.6b00523] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Abstract
We report on a synthetic method where polyanhydride is used as starting material and the ester monomers are inserted through complete esterification, leading to an alternating ester-anhydride copolymer. The molar ratio of ricinoleic acid (RA) and sebacic acid (SA) was optimized until polysebacic acid is completely converted to carboxylic acid-terminated RA-SA and RA-SA-RA ester-dicarboxylic acids. These dimers and trimers were activated with acetic anhydride, polymerized under heat and vacuum to yield alternating RA-SA copolymer. The resulting alternating poly(ester-anhydride) have the RA at regular intervals. The regular occurrences of RA side chains prevent anhydride interchange, enhancing hydrolytic stability, which allows storage of the polymer at room temperature.
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Affiliation(s)
- Moran Haim-Zada
- School of Pharmacy, Institute of Drug Research, Hebrew University of Jerusalem , Jerusalem 9112001, Israel
| | - Arijit Basu
- School of Pharmacy, Institute of Drug Research, Hebrew University of Jerusalem , Jerusalem 9112001, Israel
| | - Tal Hagigit
- Dexcel Pharma Technologies, Ltd , Or-Akiva 30600000, Israel
| | - Ron Schlinger
- Dexcel Pharma Technologies, Ltd , Or-Akiva 30600000, Israel
| | - Michael Grishko
- TAMI- Institute for Research & Development, Ltd , Haifa Bay 26111, Israel
| | | | - Ezra Hanuka
- TAMI- Institute for Research & Development, Ltd , Haifa Bay 26111, Israel
| | - Abraham J Domb
- School of Pharmacy, Institute of Drug Research, Hebrew University of Jerusalem , Jerusalem 9112001, Israel
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15
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Biomaterial-based regional chemotherapy: Local anticancer drug delivery to enhance chemotherapy and minimize its side-effects. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2016; 62:927-42. [DOI: 10.1016/j.msec.2016.01.063] [Citation(s) in RCA: 111] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/19/2016] [Accepted: 01/24/2016] [Indexed: 02/06/2023]
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16
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Abstract
This review focusses on polyanhydrides, a fascinating class of degradable polymers that have been used in and investigated for many bio-related applications because of their degradability and capacity to undergo surface erosion. This latter phenomenon is driven by hydrolysis of the anhydride moieties at the surface and high hydrophobicity of the polymer such that degradation and mass loss (erosion) occur before water can penetrate deep within the bulk of the polymer. As such, when surface-eroding polymers are used as therapeutic delivery vehicles, the rate of delivery is often controlled by the rate of polymer erosion, providing predictable and controlled release rates that are often zero-order. These desirable attributes are heavily influenced by polymer composition and morphology, and therefore also monomer structure and polymerization method. This review examines approaches for polyanhydride synthesis, discusses their general thermomechanical properties, surveys their hydrolysis and degradation processes along with their biocompatibility, and looks at recent developments and uses of polyanhydrides in drug delivery, stimuli-responsive materials, and novel nanotechnologies.
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Ickowicz DE, Abtew E, Khan W, Golovanevski L, Steinman N, Weiniger CF, Domb AJ. Poly(ester-anhydride) for controlled delivery of hydrophilic drugs. J BIOACT COMPAT POL 2015. [DOI: 10.1177/0883911515598796] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Injectable pasty polyester-anhydride based on sebacic acid and ricinoleic acid at a 30:70 w/w ratio, poly(sebacic-co-ricinoleic-ester-anhydride) 3:7, was synthesized from the esterification of ricinoleic acid on poly(sebacic acid) followed by polyanhydride condensation. The effect of castor oil, citric acid, and glycerol added at 1% w/w as branching agents was determined. Castor oil and citric acid increased the viscosity, while glycerol decreased the viscosity of the polymer. Constant release of gentamicin and thyrotropin-releasing hormone incorporated in the polymer paste was monitored during 28 days.
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Affiliation(s)
- Diana E Ickowicz
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Ester Abtew
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Wahid Khan
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Hyderabad, India
| | - Ludmila Golovanevski
- Department of Anesthesiology and Critical Care Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Noam Steinman
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
| | - Carolyn F Weiniger
- Department of Anesthesiology and Critical Care Medicine, Hadassah Hebrew University Medical Center, Jerusalem, Israel
- Stanford School of Medicine, Stanford, CA, USA
| | - Abraham J Domb
- Institute of Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem, Israel
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18
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Yang M, Yu T, Wood J, Wang YY, Tang BC, Zeng Q, Simons BW, Fu J, Chuang CM, Lai SK, Wu TC, Hung CF, Hanes J. Intraperitoneal delivery of paclitaxel by poly(ether-anhydride) microspheres effectively suppresses tumor growth in a murine metastatic ovarian cancer model. Drug Deliv Transl Res 2015; 4:203-9. [PMID: 24816829 DOI: 10.1007/s13346-013-0190-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
Intraperitoneal (IP) chemotherapy is more effective than systemic chemotherapy for treating advanced ovarian cancer, but is typically associated with severe complications due to high dose, frequent administration schedule, and use of non-biocompatible excipients/delivery vehicles. Here, we developed paclitaxel (PTX)-loaded microspheres composed of di-block copolymers of poly(ethylene glycol) and poly(sebacic acid) (PEG-PSA) for safe and sustained IP chemotherapy. PEG-PSA microspheres provided efficient loading (~ 13% w/w) and prolonged release (~ 13 days) of PTX. In a murine ovarian cancer model, a single dose of IP PTX/PEG-PSA particles effectively suppressed tumor growth for more than 40 days and extended the median survival time to 75 days compared to treatments with Taxol(®) (47 days) or IP placebo particles (34 days). IP PTX/PEG-PSA was well tolerated, with only minimal to mild inflammation. Our findings support PTX/PEG-PSA microspheres as a promising drug delivery platform for IP therapy of ovarian cancer, and potentially other metastatic peritoneal cancers.
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Affiliation(s)
- Ming Yang
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205 (USA) ; Center for Nanomedicine, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA)
| | - Tao Yu
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205 (USA) ; Center for Nanomedicine, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA)
| | - Joseph Wood
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205 (USA)
| | - Ying-Ying Wang
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205 (USA) ; Center for Nanomedicine, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA)
| | - Benjamin C Tang
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218 (USA) ; Center for Nanomedicine, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA)
| | - Qi Zeng
- Department of Pathology, Johns Hopkins University School of Medicine, 600 N Wolfe Street, Baltimore, MD 21287 (USA)
| | - Brian W Simons
- Department of Molecular and Comparative Pathobiology, Johns Hopkins University School of Medicine, 1550 Orleans Street, Baltimore, MD, 21231 (USA)
| | - Jie Fu
- Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA) ; Center for Nanomedicine, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA)
| | - Chi-Mu Chuang
- Department of Pathology, Johns Hopkins University School of Medicine, 600 N Wolfe Street, Baltimore, MD 21287 (USA)
| | - Samuel K Lai
- Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218 (USA)
| | - T-C Wu
- Department of Pathology, Johns Hopkins University School of Medicine, 600 N Wolfe Street, Baltimore, MD 21287 (USA) ; Department of Obstetrics and Gynecology, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287 (USA) ; Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287 (USA)
| | - Chien-Fu Hung
- Department of Pathology, Johns Hopkins University School of Medicine, 600 N Wolfe Street, Baltimore, MD 21287 (USA) ; Department of Obstetrics and Gynecology, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287 (USA) ; Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287 (USA)
| | - Justin Hanes
- Department of Biomedical Engineering, Johns Hopkins University School of Medicine, 720 Rutland Avenue, Baltimore, MD 21205 (USA) ; Department of Chemical and Biomolecular Engineering, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218 (USA) ; Department of Ophthalmology, The Wilmer Eye Institute, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA) ; Department of Oncology, Sidney Kimmel Comprehensive Cancer Center, Johns Hopkins University School of Medicine, 600 N. Wolfe Street, Baltimore, MD 21287 (USA) ; Center for Cancer Nanotechnology Excellence, Institute for NanoBioTechnology, Johns Hopkins University, 3400 N Charles Street, Baltimore, MD 21218 (USA) ; Center for Nanomedicine, Johns Hopkins University School of Medicine, 400 N Broadway, Baltimore, MD 21287 (USA)
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19
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Bagherifam S, Griffiths GW, Mælandsmo GM, Nyström B, Hasirci V, Hasirci N. Poly(sebacic anhydride) nanocapsules as carriers: effects of preparation parameters on properties and release of doxorubicin. J Microencapsul 2014; 32:166-74. [PMID: 25323326 DOI: 10.3109/02652048.2014.973073] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Poly(sebacic anhydride) (PSA) is a promising polymer for the production of drug delivery vehicles. The aim of this work is to study the effect of preparation parameters on the quality of the nanoparticles. In this study, doxorubicin (DOX)-loaded PSA nanocapsules were prepared by an emulsion method. Effects of factors such as type of organic solvent, co-solute (surfactant) and its concentration on drug-loading efficiency, particle size and size distribution, morphology and release profile were examined to gain insight in the preparation and stability of nanostructures. Particles with sizes in the range of 218-1198 nm were prepared. The smallest particles with a narrow size distribution were prepared by using polyvinyl alcohol as a co-solute and dichloromethane as a solvent. Efficiency and intracellular release of doxorubicin from the formulated particles were studied on MDA-MB-231 cells. It was observed that DOX-loaded PSA particles can diffuse into the cells and intracellular antitumour activity is directly related to the released amount of drug from the PSA nanocapsules.
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Affiliation(s)
- Shahla Bagherifam
- Graduate Department of Polymer Science and Technology, Middle East Technical University , Ankara , Turkey
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20
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Eckhard LH, Sol A, Abtew E, Shai Y, Domb AJ, Bachrach G, Beyth N. Biohybrid polymer-antimicrobial peptide medium against Enterococcus faecalis. PLoS One 2014; 9:e109413. [PMID: 25279943 PMCID: PMC4184853 DOI: 10.1371/journal.pone.0109413] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2014] [Accepted: 08/31/2014] [Indexed: 11/26/2022] Open
Abstract
Antimicrobial peptides (AMPs) are conserved evolutionary components of the innate immune system that are being tested as alternatives to antibiotics. Slow release of AMPs using biodegradable polymers can be advantageous in maintaining high peptide levels for topical treatment, especially in the oral environment in which dosage retention is challenged by drug dilution with saliva flow and by drug inactivation by salivary enzymatic activity. Enterococcus faecalis is a multidrug resistant nosocomial pathogen and a persistent pathogen in root canal infections. In this study, four ultra-short lipopeptides (C16-KGGK, C16-KLLK, C16-KAAK and C16-KKK) and an amphipathic α-helical antimicrobial peptide (Amp-1D) were tested against E. faecalis. The antibacterial effect was determined against planktonic bacteria and bacteria grown in biofilm. Of the five tested AMPs, C16-KGGK was the most effective. Next C16-KGGK was formulated with one of two polymers poly (lactic acid co castor oil) (DLLA) or ricinoleic acid-based poly (ester-anhydride) P(SA-RA). Peptide-synthetic polymer conjugates, also referred to as biohybrid mediums were tested for antibacterial activity against E. faecalis grown in suspension and in biofilms. The new formulations exhibited strong and improved anti- E. faecalis activity.
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Affiliation(s)
- Lea H. Eckhard
- Department of Prosthodontics, the Hebrew University – Faculty of Dental Medicine, Jerusalem, Israel
| | - Asaf Sol
- Institute of Dental Science, the Hebrew University – Faculty of Dental Medicine, Jerusalem, Israel
| | - Ester Abtew
- Institute for Drug Research, School of Pharmacology, Faculty of Medicine, the Hebrew University, Jerusalem, Israel
| | - Yechiel Shai
- Department of Biological Chemistry, the Weizmann Institute of Science, Rehovot, Israel
| | - Abraham J. Domb
- Institute for Drug Research, School of Pharmacology, Faculty of Medicine, the Hebrew University, Jerusalem, Israel
| | - Gilad Bachrach
- Institute of Dental Science, the Hebrew University – Faculty of Dental Medicine, Jerusalem, Israel
| | - Nurit Beyth
- Department of Prosthodontics, the Hebrew University – Faculty of Dental Medicine, Jerusalem, Israel
- * E-mail:
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21
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Elsner JJ, Kraitzer A, Grinberg O, Zilberman M. Highly porous drug-eluting structures: from wound dressings to stents and scaffolds for tissue regeneration. BIOMATTER 2014; 2:239-70. [PMID: 23507890 PMCID: PMC3568110 DOI: 10.4161/biom.22838] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
For many biomedical applications, there is need for porous implant materials. The current article focuses on a method for preparation of drug-eluting porous structures for various biomedical applications, based on freeze drying of inverted emulsions. This fabrication process enables the incorporation of any drug, to obtain an "active implant" that releases drugs to the surrounding tissue in a controlled desired manner. Examples for porous implants based on this technique are antibiotic-eluting mesh/matrix structures used for wound healing applications, antiproliferative drug-eluting composite fibers for stent applications and local cancer treatment, and protein-eluting films for tissue regeneration applications. In the current review we focus on these systems. We show that the release profiles of both types of drugs, water-soluble and water-insoluble, are affected by the emulsion's formulation parameters. The former's release profile is affected mainly through the emulsion stability and the resulting porous microstructure, whereas the latter's release mechanism occurs via water uptake and degradation of the host polymer. Hence, appropriate selection of the formulation parameters enables to obtain desired controllable release profile of any bioactive agent, water-soluble or water-insoluble, and also fit its physical properties to the application.
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Affiliation(s)
- Jonathan J Elsner
- Department of Biomedical Engineering, Tel-Aviv University, Tel-Aviv, Israel
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22
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Antibiotics Delivery for Treating Bone Infections. ADVANCES IN DELIVERY SCIENCE AND TECHNOLOGY 2014. [DOI: 10.1007/978-1-4614-9434-8_21] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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23
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Vaisman B, Ickowicz DE, Abtew E, Haim-Zada M, Shikanov A, Domb AJ. In Vivo Degradation and Elimination of Injectable Ricinoleic Acid-Based Poly(ester-anhydride). Biomacromolecules 2013; 14:1465-73. [DOI: 10.1021/bm4001475] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Boris Vaisman
- Institute
for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Diana E. Ickowicz
- Institute
for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Ester Abtew
- Institute
for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Moran Haim-Zada
- Institute
for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Ariella Shikanov
- Institute
for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Abraham J. Domb
- Institute
for Drug Research, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
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24
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Maisonneuve L, Lebarbé T, Grau E, Cramail H. Structure–properties relationship of fatty acid-based thermoplastics as synthetic polymer mimics. Polym Chem 2013. [DOI: 10.1039/c3py00791j] [Citation(s) in RCA: 173] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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25
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Kraitzer A, Alperstein D, Kloog Y, Zilberman M. Mechanisms of antiproliferative drug release from bioresorbable porous structures. J Biomed Mater Res A 2012; 101:1302-10. [DOI: 10.1002/jbm.a.34436] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2012] [Revised: 07/26/2012] [Accepted: 08/31/2012] [Indexed: 11/11/2022]
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26
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Nazneen F, Herzog G, Arrigan DW, Caplice N, Benvenuto P, Galvin P, Thompson M. Surface chemical and physical modification in stent technology for the treatment of coronary artery disease. J Biomed Mater Res B Appl Biomater 2012; 100:1989-2014. [DOI: 10.1002/jbm.b.32772] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2012] [Accepted: 06/20/2012] [Indexed: 12/12/2022]
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27
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Salgado CL, Sanchez EM, Zavaglia CA, Almeida AB, Granja PL. Injectable Biodegradable Polycaprolactone–Sebacic Acid Gels for Bone Tissue Engineering. Tissue Eng Part A 2012; 18:137-46. [DOI: 10.1089/ten.tea.2011.0294] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Christiane L. Salgado
- INEB-Instituto de Engenharia Biomédica, Universidade do Porto, Porto, Portugal
- Faculdade de Engenharia, Universidade do Porto (FEUP), Porto, Portugal
| | - Elisabete M.S. Sanchez
- School of Mechanical Engineering, State University of Campinas (UNICAMP)–R. Mendeleyev, Campinas, Brazil
| | - Cecília A.C. Zavaglia
- School of Mechanical Engineering, State University of Campinas (UNICAMP)–R. Mendeleyev, Campinas, Brazil
| | - Ana Beatriz Almeida
- Sociedade Brasileira de Pesquisa e Assistência para a Reabilitação Craniofacial (SOBRAPAR), Campinas, Brazil
| | - Pedro L. Granja
- School of Mechanical Engineering, State University of Campinas (UNICAMP)–R. Mendeleyev, Campinas, Brazil
- Sociedade Brasileira de Pesquisa e Assistência para a Reabilitação Craniofacial (SOBRAPAR), Campinas, Brazil
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28
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Long-Acting Poly(DL:Lactic Acid-Castor Oil) 3:7-Bupivacaine Formulation: Effect of Hydrophobic Additives. Pharm Res 2011; 28:3265-73. [DOI: 10.1007/s11095-011-0497-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2010] [Accepted: 05/27/2011] [Indexed: 10/18/2022]
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29
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Kraitzer A, Kloog Y, Haklai R, Zilberman M. Composite Fiber Structures with Antiproliferative Agents Exhibit Advantageous Drug Delivery and Cell Growth Inhibition In Vitro. J Pharm Sci 2011; 100:133-49. [DOI: 10.1002/jps.22238] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2009] [Revised: 03/15/2010] [Accepted: 04/22/2010] [Indexed: 11/08/2022]
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30
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Havivi E, Farber S, Domb AJ. Poly(sebacic acid-co-ricinoleic acid) biodegradable carrier for delivery of tamsulosin hydrochloride. POLYM ADVAN TECHNOL 2010. [DOI: 10.1002/pat.1738] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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31
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32
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Sokolsky-Papkov M, Golovanevski L, Domb AJ, Weiniger CF. Poly(dl:Lactic Acid-Castor Oil) 3:7-Bupivacaine Formulation: Reducing Burst Effect Prolongs Efficacy In Vivo. J Pharm Sci 2010; 99:2732-8. [DOI: 10.1002/jps.22025] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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33
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Johnson ML, Uhrich KE. Concurrent release of admixed antimicrobials and salicylic acid from salicylate-based poly(anhydride-esters). J Biomed Mater Res A 2010; 91:671-8. [PMID: 19180627 DOI: 10.1002/jbm.a.32288] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
A polymer blend consisting of antimicrobials (chlorhexidine, clindamycin, and minocycline) physically admixed at 10% by weight into a salicylic acid-based poly (anhydride-ester) (SA-based PAE) was developed as an adjunct treatment for periodontal disease. The SA-based PAE/antimicrobial blends were characterized by multiple methods, including contact angle measurements and differential scanning calorimetry. Static contact angle measurements showed no significant differences in hydrophobicity between the polymer and antimicrobial matrix surfaces. Notable decreases in the polymer glass transition temperature (T(g)) and the antimicrobials' melting points (T(m)) were observed indicating that the antimicrobials act as plasticizers within the polymer matrix. In vitro drug release of salicylic acid from the polymer matrix and for each physically admixed antimicrobial was concurrently monitored by high pressure liquid chromatography during the course of polymer degradation and erosion. Although the polymer/antimicrobial blends were immiscible, the initial 24 h of drug release correlated to the erosion profiles. The SA-based PAE/antimicrobial blends are being investigated as an improvement on current localized drug therapies used to treat periodontal disease.
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Affiliation(s)
- Michelle L Johnson
- Department of Chemistry and Chemical Biology, Rutgers University, 610 Taylor Road, Piscataway, New Jersey 08854-8087, USA
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34
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Brin YS, Nyska A, Domb AJ, Golenser J, Mizrahi B, Nyska M. Biocompatibility of a polymeric implant for the treatment of osteomyelitis. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2009; 20:1081-90. [PMID: 19454170 DOI: 10.1163/156856209x444439] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
We evaluated the biocompatibility of an injectable gelling polymeric device for the controlled release of gentamicin sulfate in the treatment of invasive bacterial infections in bone of male Wister rats. The biodegradable delivery carrier, poly(sebacic-co-ricinoleic-ester-anhydride), designated as p(SA:RA), was injected, with and without gentamicin, into the tibial canal. Rats were killed 3 weeks later. The tibiae were processed histologically, leaving the injectable polymer in situ. The local tissue reaction to the polymer with or without antibiotic consisted mainly of mild reactive fibroplasia/fibrosis and mild to moderate increased reactive bone formation. At this stage, no evidence for any active inflammatory response to the polymer was seen. Thus, the injection of p(SA:RA) was well tolerated and did not induce any signs of a progressive inflammatory reaction.
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Affiliation(s)
- Y S Brin
- Department of Orthopaedic Surgery, Meir Medical Center, 48 Tchernichovsky Str., Kfar-Saba 44281, Israel.
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35
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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.
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Affiliation(s)
- Robert C Schmeltzer
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854, USA
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36
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Shikanov S, Shikanov A, Gofrit O, Nyska A, Corn B, Domb AJ. Intratumoral Delivery of Paclitaxel for Treatment of Orthotopic Prostate Cancer. J Pharm Sci 2009; 98:1005-14. [DOI: 10.1002/jps.21492] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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37
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Shikanov A, Vaisman B, Shikanov S, Domb AJ. Efficacy of poly(sebacic acid-co-ricinoleic acid) biodegradable delivery system for intratumoral delivery of paclitaxel. J Biomed Mater Res A 2009; 92:1283-91. [DOI: 10.1002/jbm.a.32429] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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38
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Biocompatibility and safety evaluation of a ricinoleic acid-based poly(ester-anhydride) copolymer after implantation in rats. J Biomed Mater Res A 2009; 92:419-31. [DOI: 10.1002/jbm.a.32342] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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39
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Brin YS, Golenser J, Mizrahi B, Maoz G, Domb AJ, Peddada S, Tuvia S, Nyska A, Nyska M. Treatment of osteomyelitis in rats by injection of degradable polymer releasing gentamicin. J Control Release 2008; 131:121-7. [PMID: 18692531 DOI: 10.1016/j.jconrel.2008.07.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2008] [Revised: 06/26/2008] [Accepted: 07/11/2008] [Indexed: 10/21/2022]
Abstract
We evaluated the potential of an injectable degradable polymer-poly(sebacic-co-ricinoleic-ester-anhydride) containing gentamicin for the treatment of osteomyelitis. Osteomyelitis of both tibiae was induced in 13 female Fischer rats by injecting a suspension containing approximately 105 (CFU)/ml of S. aureus into the tibial medullar canal. Three weeks later both tibiae were X-rayed, drilled down the medullar canal, washed with 50 microl gentamicin solution (80 mg/2 ml) and then injected with 50 microl P(SA-RA)+gentamycin 20% w/v to the right tibia and 50 microl P(SA-RA) without gentamicin to the left tibia. After an additional 3 weeks, the rats were sacrificed, and radiographs of the tibiae were taken. Histopathological evaluation of the tibiae was done in a blinded manner. X-ray radiographs showed that all tibiae developed changes compatible with osteomyelitis in 3 weeks. Histological evaluation revealed significant differences between right and left tibiae in 10 rats. In the left tibia moderate intramedullary abscess formation occurred. In most treated tibiae typical changes included the absence (or minimal grade only) of abscesses. The treated group developed significantly less intramedullary abscesses; the p value was 0.028. Locally injected degradable polymer releasing gentamicin proved to be efficient histologically in the treatment of osteomyelitis.
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Affiliation(s)
- Yaron S Brin
- Department of Orthopaedic Surgery, Meir Medical Center, 48 Tchernichovsky Str., Kfar-Saba 44281, Israel.
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40
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Kraitzer A, Kloog Y, Zilberman M. Approaches for prevention of restenosis. J Biomed Mater Res B Appl Biomater 2008; 85:583-603. [PMID: 18098192 DOI: 10.1002/jbm.b.30974] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Coronary artery disease is characterized by a narrowing (stenosis) of the arteries that supply blood to the tissue of the heart. Continued restriction of blood flow manifests itself as angina and ultimately myocardial infarction (heart attack) for the patient. Heart bypass was once the only treatment for this condition, but over the years percutaneous coronary intervention (PCI) has become an increasingly attractive alternative to medical therapy and surgical revascularization for the treatment of coronary artery disease. A vascular stent is a medical device designed to serve as a temporary or permanent internal scaffold, to maintain or increase the lumen of a blood vessel. Metallic coronary stents were first introduced to prevent arterial dissections and to eliminate vessel recoil and intimal hyperplasia associated with PCI. Further advancement in the treatment of coronary artery disease is the development of drug-eluting stents that dramatically reduce the incidence of in-stent restenosis to less than 5%. Local drug delivery offers the advantages of allowing a relatively high local concentration of drug at the treatment site while minimizing systemic toxic effect. This review describes approaches for prevention of restenosis. It focuses on drugs for prevention of restenosis, bare metal stents, and drug-eluting stents. It also describes recent advances in bioresorbable stents. One of the chapters is dedicated to our novel composite bioresorbable drug-eluting fibers, designed to be used as basic elements in drug-eluting stents.
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Affiliation(s)
- Amir Kraitzer
- Department of Biomedical Engineering, Faculty of Engineering, Tel-Aviv University, Tel-Aviv 69978, Israel
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Kraitzer A, Ofek L, Schreiber R, Zilberman M. Long-term in vitro study of paclitaxel-eluting bioresorbable core/shell fiber structures. J Control Release 2008; 126:139-48. [DOI: 10.1016/j.jconrel.2007.11.011] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2007] [Revised: 11/13/2007] [Accepted: 11/16/2007] [Indexed: 10/22/2022]
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Jain JP, Modi S, Kumar N. Hydroxy fatty acid based polyanhydride as drug delivery system: Synthesis, characterization,in vitro degradation, drug release, and biocompatibility. J Biomed Mater Res A 2008; 84:740-52. [PMID: 17635032 DOI: 10.1002/jbm.a.31456] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
Low molecular weight hydroxy fatty acid based polyanhydrides were synthesized by one pot method, a variable of typical melt-condensation and characterized by FTIR, NMR, DSC, and GPC. Polymer degrades by both surface and bulk erosion as trailed by weight loss, anhydride loss and surface morphology. Control over drug release was accessed with drugs featuring different aqueous solubility, that is, methotrexate (hydrophobic) and 5-fluorouracil (hydrophilic). Effect of loading, at 5, 10, and 20% w/w of methotrexate on release profiles was also studied and negligible effect was discovered. Biocompatibility of polymers was evaluated in SD rats after SC injection of the polymer. Histopathology revealed initial inflammation of the tissues near the injection site however healed with time. Overall, these polymers were found good to control the release of the entrapped drug and were found biocompatible in preliminary in vivo study. Due to their low melting temperatures they can be injected locally (SC or intratumorally) to from regional in situ depot and have a great potential as a drug carrier for localized delivery of anticancer drugs.
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Affiliation(s)
- Jay Prakash Jain
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sector 67, SAS Nagar, Mohali 160062, India
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Sokolsky-Papkov M, Domb AJ. Stereoisomeric effect onin vitro drug release from injectable poly(lactic acid co castor oil) polyesters. POLYM ADVAN TECHNOL 2008. [DOI: 10.1002/pat.1140] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Krasko MY, Domb AJ. Pasty injectable biodegradable polymers derived from natural acids. J Biomed Mater Res A 2007; 83:1138-1145. [PMID: 17595020 DOI: 10.1002/jbm.a.31395] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Pasty biodegradable polymers that can be mixed with drugs at room temperature and injected to tissue as neat composition are advantageous as they allow simple preparation and delivery of drugs, particularly for heat sensitive drugs. A series of biodegradable pasty poly (ester-anhydride)s were prepared from alkanedicarboxylic acids and ricinoleic acid and its oligomers by transesterification-repolymerization method. The polymers were characterized by common spectroscopic, chromatography, and thermal methods. Polymers containing 70% ricinoleic acid and 30% linear dicarboxylic acids with 4-10 methylene groups were synthesized. The melting point of these poly (ester-anhydride)s increased as the number of methylenes in the alkanedicarboxylic acid increased. Use of short oligomers of ricinoleic acid instead of ricinoleic acid itself increased the melting point and decreased the softness of the resulting polymers. The polymers released model drugs for a few weeks while being degraded to their fatty acid counterparts. Copolymerization of alkanedicarboxylic acids with ricinoleic acid resulted in pasty biodegradable polymers useful as injectable carriers for drugs.
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Affiliation(s)
- Michal Y Krasko
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
- Devid R. Bloom Center for Pharmacy, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
- Alex Grass Center for Synthesis and Drug Design, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
| | - Abraham J Domb
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy, Faculty of Medicine, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
- Devid R. Bloom Center for Pharmacy, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
- Alex Grass Center for Synthesis and Drug Design, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
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Synthesis, crystallinity and degradation properties of biodegradable poly[(sebacic anhydride)-co-caprolactone] triblock copolymers. POLYM INT 2007. [DOI: 10.1002/pi.2349] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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Krasko MY, Golenser J, Nyska A, Nyska M, Brin YS, Domb AJ. Gentamicin extended release from an injectable polymeric implant. J Control Release 2007; 117:90-6. [PMID: 17150275 DOI: 10.1016/j.jconrel.2006.10.010] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2006] [Revised: 10/03/2006] [Accepted: 10/08/2006] [Indexed: 11/25/2022]
Abstract
Gentamicin sulfate, a potent antibiotic agent, is currently used for treatment of osteomyelitis mainly by intravenous injection with a long-term indwelling catheter, local implant of antibiotic containing polymethylmethacrylate beads or calcium phosphate (bone cements). Searching for more effective treatments, this study was designed to evaluate biodegradable injectable gelling polymeric devices for the controlled release of gentamicin sulfate in the treatment of invasive bacterial infections. Gentamicin sulfate was incorporated in poly(sebacic-co-ricinoleic-ester-anhydride P(SA-RA)) paste at 10-20% w/w and its release in buffer solution was monitored. The in vitro activity of the formulations was determined against Staphylococcus aureus. A constant release of active gentamicin for over 28 days was found. The stability of the formulation was determined under different storage conditions. The formulations were stable to sterilization by gamma-irradiation and long term storage under freezing. The toxicity of the polymer and the formulations with gentamicin was examined by subcutaneous injection to rats. Four weeks after implantation, histopathological examination of the tissues surrounding the implant showed no inflammation. A preliminary study revealed positive effect of gentamicin containing P(SA-RA) on established osteomyelitis in a rat model. In conclusion this study suggests that poly(sebacic-co-ricinoleic-ester-anhydride) 3:7 loaded with 10%-20% gentamicin sulfate, might be used as an injectable biodegradable device for in situ treatment of osteomyelitis induced by S. aureus.
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Affiliation(s)
- Michal Y Krasko
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy, The Hebrew University of Jerusalem, 91120 Jerusalem, Israel
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Chitkara D, Shikanov A, Kumar N, Domb AJ. Biodegradable Injectable In Situ Depot-Forming Drug Delivery Systems. Macromol Biosci 2006; 6:977-90. [PMID: 17128422 DOI: 10.1002/mabi.200600129] [Citation(s) in RCA: 76] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The scope of drug-delivery systems has expanded significantly in recent years providing new ways to deliver life saving therapeutics to patients. The development of new injectable drug-delivery systems has provided new vistas and opened up unexplored horizons in the field of science, particularly in controlled drug delivery since these systems possess unique advantages over traditional ones, which include ease of application, and localized and prolonged drug delivery. In the past few years, an increasing number of such systems has been reported in the literature for various biomedical applications, including drug delivery, cell encapsulation, and tissue repair. These are injectable fluids that can be introduced into the body in a minimally invasive manner prior to solidifying or gelling within the desired site. For this purpose both natural (chitosan, alginates) as well as synthetic polymers (PEGylated polyesters, ricinoleic acid-based polymers) have been utilized. These systems have been explored widely for the delivery of various therapeutic agents ranging for anti-neoplastic agents like paclitaxel to proteins and peptides such as insulin, almost covering every segment of the pharmaceutical field. This manuscript focuses on the recent advancements in the area of in situ forming biodegradable polymeric drug-delivery systems.
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Affiliation(s)
- Deepak Chitkara
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Sec. 67, SAS Nagar, Mohali 160062, India
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Modi S, Jain JP, Domb AJ, Kumar N. Copolymers of pharmaceutical grade lactic acid and sebacic acid: Drug release behavior and biocompatibility. Eur J Pharm Biopharm 2006; 64:277-86. [PMID: 16846724 DOI: 10.1016/j.ejpb.2006.05.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/17/2006] [Revised: 05/18/2006] [Accepted: 05/19/2006] [Indexed: 10/24/2022]
Abstract
Pharmaceutical grade D,L-lactic acid, which is rather an economic source in comparison to lactide monomer, was utilized for synthesis of a series of copolymers with sebacic acid. Polymers were characterized by GPC, FTIR, NMR and DSC techniques, and formulated into blank and methotrexate (MTX) loaded microspheres by emulsion-solvent evaporation method. In vitro degradation of blank microspheres was studied by FTIR, GPC and SEM analysis. MTX loaded microspheres showed the encapsulation efficiency of 44-64% and were in the size range of 40-60 microm. These were used to study the release profile of the encapsulated drug. The release was found to be affected by the pH and buffer concentration of the release medium which was in turn revealed by solubility studies of MTX. The overall study demonstrates significance of drug as well as polymer properties on release. Biocompatibility of polymer was evaluated by injecting microspheres subcutaneously into Sprague-Dawley (SD) rat and no local histopathological abnormalities were found.
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Affiliation(s)
- Sweta Modi
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research, Mohali, India
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Krasko MY, Kumar N, Domb AJ. Protein and Peptide Release from in Situ Gelling Polymer. Biomacromolecules 2006; 7:2461-3. [PMID: 16903697 DOI: 10.1021/bm060255q] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Michal Y Krasko
- Department of Medicinal Chemistry and Natural Products, School of Pharmacy - Faculty of Medicine, The Hebrew University of Jerusalem, Jerusalem-91120, Israel
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Schmeltzer RC, Uhrich KE. Synthesis and characterization of antiseptic-based poly(anhydride-esters). Polym Bull (Berl) 2006; 57:281-291. [PMID: 24039323 DOI: 10.1007/s00289-006-0561-z] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
Poly(anhydride-esters) were prepared from catechol, fenticlor and hexachlorophene. The molecular weights (Mw) of the polymers were typically > 10,000 Da with glass transition temperatures (Tg) ranging from 23 to 84 °C. The thermal characteristics of the polymers paralleled the melting temperatures of the chemically incorporated antiseptic molecules. The in vitro release of the chemically incorporated antiseptic molecules were monitored over a 12 week period. For comparison, the in vitro release of physically admixed antiseptic molecules were also observed. After 12 weeks, the polymers were not completely degraded with drug release ranging from less than 1 to 55 %. Sessile-drop contact angles indicated that the polymers were relatively hydrophobic, contributing to the slow polymer degradation rates.
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Affiliation(s)
- Robert C Schmeltzer
- Department of Chemistry and Chemical Biology, Rutgers University, Piscataway, NJ 08854-8087
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