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Men J, Gao B, Yao L, Zhang Y. Preparation and Characterization of Metronidazole-Surface Imprinted Microspheres MIP-PSSS/CPVA for Colon-Specific Drug Delivery System. JOURNAL OF MACROMOLECULAR SCIENCE PART A-PURE AND APPLIED CHEMISTRY 2014. [DOI: 10.1080/10601325.2014.953376] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Ouyang N, Ji P, Williams JL. A novel NSAID derivative, phospho-ibuprofen, prevents AOM-induced colon cancer in rats. Int J Oncol 2012; 42:643-50. [PMID: 23291777 PMCID: PMC3982714 DOI: 10.3892/ijo.2012.1756] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2012] [Accepted: 11/23/2012] [Indexed: 12/28/2022] Open
Abstract
The cancer chemopreventive properties and gastrointestinal toxicity of ibuprofen are well documented. Modification of existing NSAIDs has improved on the chemopreventive efficacy of this agent and reduced its toxicity. In this study, ibuprofen and a modified derivative (phospho-modified ibuprofen or p-ibuprofen) were used in a chemically induced model of colon cancer. Fisher 344 rats were injected with azoxymethane then treated with either ibuprofen (500 ppm) or p-ibuprofen (900 ppm) for 20 weeks to observe aberrant crypt foci (ACF) or 40 weeks to evaluate tumor incidence and multiplicity. β-catenin and p65 were measured in colonic tissues by immunofluorescence staining. Equal molar doses of ibuprofen (75 and 670 mg/kg) and p-ibuprofen (135 and 1,215 mg/kg) were administered to rats for 7 days to assess acute toxicity. The in vitro effect of p-ibuprofen on COX-2 and PGE(2) synthesis, β-catenin expression and NF-κB activity were examined in RAW 264.7 macrophage and HCT 116 colon cancer cells. At week 20, p-ibuprofen and ibuprofen significantly reduced the multiplicity of ACF compared with control (p<0.05); 31.2 and 37.9%, respectively. At week 40, p-ibuprofen and ibuprofen reduced the multiplicity of colon tumors compared with control (p<0.01) by 47.2 and 56.6%, respectively. Equal molar concentrations of ibuprofen (670 mg/kg) and p-ibuprofen (1,215 mg/kg) resulted in stomach ulceration in 85.7% (6 out of 7) and 14.3% (1 out of 7) of rats, respectively, with p<0.01. Immunofluoresence staining and western blot analysis demonstrated that both ibuprofen and p-ibuprofen suppressed β-catenin nuclear translocation in colon cancer cells. In addition, p-ibuprofen but not ibuprofen inhibited NF-κB activation in colon cancer cells. Collectively, these results suggest that p-ibuprofen is a potential effective novel drug for long-term use in colon cancer prevention.
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Affiliation(s)
- Nengtai Ouyang
- Division of Cancer Prevention, Department of Medicine, Stony Brook University, Stony Brook, NY 11794-8175, USA
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John Ł, Bałtrukiewicz M, Sobota P, Brykner R, Cwynar-Zając Ł, Dzięgiel P. Non-cytotoxic organic–inorganic hybrid bioscaffolds: An efficient bedding for rapid growth of bone-like apatite and cell proliferation. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2012; 32:1849-1858. [DOI: 10.1016/j.msec.2012.05.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Revised: 03/31/2012] [Accepted: 05/03/2012] [Indexed: 10/28/2022]
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Tsai MF, Chiang YL, Wang LF, Huang GW, Wu PC. Oral sustained delivery of diclofenac sodium using calcium chondroitin sulfate matrix. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2012; 16:1319-31. [PMID: 16268256 DOI: 10.1163/156856205774269520] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Chondroitin sulfate (CS) is a potential candidate for colon-specific drug carriers. However, the readily water-soluble nature limits its application as a solid-state drug-delivery vehicle. In this study, the CS formation of a polyelectrolyte complex (PEC) with Ca2+ (CS-Ca) was adapted to retain CS in a solid form for use in a drug-delivery system. Pre-treated CS with poly(ethylene glycol) diglycidyl ether (EX-810) followed by complexation with Ca2+ was also tested (CS-Ca-EX). Diclofenac sodium was used as a drug probe to evaluate the performance of the drug-release behavior of the complexes. The amount of diclofenac sodium released was higher in simulated intestinal fluid (SIF) than in simulated gastric fluid (SGF) due to the anionic groups on CS or the higher solubility of drug itself in PBS. The release profile of diclofenac sodium from CS-Ca-EX was most notably sustained when compared to other groups. Enzymatic degradation by chondroitinase ABC of CS, CS-Ca and CS-Ca-EX exhibited a similar degradation mechanism and GPC revealed the dissolution rate of CS from the three matrix types was, in decreasing order: CS, CS-Ca, CS-Ca-EX. The synergy of the anti-inflammatory activity of diclofenac sodium in CS-based complexes was evaluated using the carrageenan-induced edema rat test. The percentage of swelling was lower for all experimental groups as compared to the control, untreated group. The anti-inflammatory activity of diclofenac in the CS matrix gradually increased up to 9 h but CS-Ca or CS-Ca-EX matrices showed less potency than the CS matrix in reducing inflammation.
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Affiliation(s)
- Ming-Fung Tsai
- College of Life Science, Kaohsiung Medical University, 100 Shih-Chuan 1st Road, Kaohsiung 807, Taiwan, ROC
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Synthesis and in vitro evaluation of potential sustained release prodrugs via targeting ASBT. Int J Pharm 2010; 396:111-8. [PMID: 20600720 DOI: 10.1016/j.ijpharm.2010.06.039] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2010] [Revised: 06/03/2010] [Accepted: 06/18/2010] [Indexed: 11/23/2022]
Abstract
The objective was to synthesize prodrugs of niacin and ketoprofen that target the human apical sodium-dependent bile acid transporter (ASBT) and potentially allow for prolonged drug release. Each drug was conjugated to the naturally occurring bile acid chenodeoxycholic acid (CDCA) using lysine as a linker. Their inhibitory binding and transport properties were evaluated in stably transfected ASBT-MDCK monolayers, and the kinetic parameters K(i), K(t), normJ(max), and P(p) were characterized. Enzymatic stability of the conjugates was evaluated in Caco-2 and liver homogenate. Both conjugates were potent inhibitors of ASBT. For the niacin prodrug, substrate kinetic parameter K(t) was 8.22microM and normJ(max) was 0.0917. In 4h, 69.4% and 26.9% of niacin was released from 1microM and 5microM of the conjugate in Caco-2 homogenate, respectively. For the ketoprofen prodrug, K(t) was 50.8microM and normJ(max) was 1.58. In 4h, 5.94% and 3.73% of ketoprofen was released from 1microM and 5microM of the conjugate in Caco-2 homogenate, and 24.5% and 12.2% of ketoprofen was released in liver homogenate, respectively. In vitro results showed that these bile acid conjugates are potential prolonged release prodrugs with binding affinity for ASBT.
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Zawidlak-Wegrzyńska B, Kawalec M, Bosek I, Łuczyk-Juzwa M, Adamus G, Rusin A, Filipczak P, Głowala-Kosińska M, Wolańska K, Krawczyk Z, Kurcok P. Synthesis and antiproliferative properties of ibuprofen-oligo(3-hydroxybutyrate) conjugates. Eur J Med Chem 2010; 45:1833-42. [PMID: 20171760 DOI: 10.1016/j.ejmech.2010.01.020] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2009] [Revised: 01/07/2010] [Accepted: 01/11/2010] [Indexed: 02/07/2023]
Abstract
Synthesis of novel conjugates of the non-steroidal anti-inflammatory drug - ibuprofen with nontoxic oligo(3-hydroxybutyrate) (OHB) is described. Presented results indicate that anionic ring-opening polymerization of (R,S)-beta-butyrolactone initiated with an alkali metal salt of (S)-(+)-2-(4-isobutylphenyl)propionic acid (ibuprofen) may constitute a convenient method of conjugation of selected drugs with biodegradable OHB. Furthermore using the MTT cell proliferation assay we demonstrated that ibuprofen conjugated with OHB exhibited significantly increased, as compared to free ibuprofen, potential to inhibit proliferation of HT-29 and HCT 116 colon cancer cells. However, the conjugates of ibuprofen and OHB are less toxic as was shown in oral acute toxicity test in rats. Although the mechanism of antiproliferative activity of ibuprofen-OHB conjugates (Ibu-OHB) has to be established, we suggest that partially it can be related to more effective cellular uptake of the conjugate than the free drug. This assumption is based on the observation of much more efficient accumulation of a marker compound - OHB conjugated with fluorescein, in contrast to fluorescein sodium salt, which entered cells inefficiently. Further characterization of biological properties of the ibuprofen-OHB conjugates would provide insight into the mechanism of their antiproliferative effect and assess the potential relevance of their anticancer activity.
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Affiliation(s)
- Barbara Zawidlak-Wegrzyńska
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, 34, M. Curie-Skłodowska St., 41-819 Zabrze, Poland
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Stasiak P, Ehrhardt C, Juzwa M, Sznitowska M. Characterisation of a novel conjugate of ibuprofen with 3-hydroxybutyric acid oligomers. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.08.0017] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
A conjugate of ibuprofen with 3-hydroxybutyric acid oligomers has been evaluated as a novel drug delivery model system.
Methods
This paper focuses on the synthesis and the characterisation of the physicochemical properties of this conjugate, and on hydrolysis studies in aqueous buffers and simulated intestinal fluid. We also describe the development of an analytical method (HPLC) for hydrolysis studies of this compound.
Key findings
The conjugate had high stability in aqueous solutions of pH 6–8 and underwent slow enzymatic hydrolysis.
Conclusions
This conjugate is not well suited for oral administration but might be considered a candidate for development of prodrug preparations for parenteral or topical sustained release.
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Affiliation(s)
- Pawel Stasiak
- Department of Pharmaceutical Technology, Medical University of Gdansk, Poland
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Ireland
| | - Carsten Ehrhardt
- School of Pharmacy and Pharmaceutical Sciences, Trinity College Dublin, Ireland
| | - Maria Juzwa
- Centre of Polymer and Carbon Materials, Polish Academy of Sciences, Zabrze, Poland
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Leonard JK, Turek D, Sloan KB, Wagener KB. Polyethylene Prodrugs Using Precisely Placed Pharmaceutical Agents. MACROMOL CHEM PHYS 2009. [DOI: 10.1002/macp.200900432] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Feeney M, Giannuzzo M, Paolicelli P, Casadei MA. Hydrogels of Dextran Containing Nonsteroidal Anti-Inflammatory Drugs as Pendant Agents. Drug Deliv 2008; 14:87-93. [PMID: 17364872 DOI: 10.1080/10717540600740003] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022] Open
Abstract
The oral administration of nonsteroidal anti-inflammatory drugs (NSAIDs) is often associated with upper gastrointestinal tract side effects. To reduce these effects and improve the therapeutic efficacy, NSAIDs are often formulated as controlled release systems. We have prepared a new formulation consisting of dextran hydrogels containing NSAIDs as pendant agents, through ultraviolet irradiation of solutions of dextran functionalized with methacrylic groups in the presence of the drug derivatized in the same way. Release studies of different drugs from this system, carried out in media simulating the gastrointestinal tract, have demonstrated that the amount of released drug is strictly related to the concentration of the polymer in the solution submitted to irradiation as well as to its derivatization degree. Our obtained data confirm that the system is able to realize a colon-specific drug delivery.
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Affiliation(s)
- Michelle Feeney
- Dipartimento di Studi di Chimica e Tecnologia delle Sostanze Biologicamente Attive, Università La Sapienza, Roma, Italy
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Davaran S, Rashidi MR, Hanaee J, Hamidi AA, Hashemi M. Synthesis and Hydrolytic Behavior of Ibuprofen Prodrugs and their PEGylated Derivatives. Drug Deliv 2008; 13:383-7. [PMID: 16877314 DOI: 10.1080/10717540500456007] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022] Open
Abstract
Polyethylene glycol (PEG) derivatives of ibuprofen were prepared by esterification of PEG monosuccinate with hydroxy ethyl ester (HEE), hydroxy ethylamide (HEA), and hydroxy ethyl thioester (HET) of ibuprofen. Hydrolysis of HEE-PEG, HEA-PEG, and HET-PEG were studied in vitro with or without esterases to investigate the applicability of these PEGylated prodrugs. The polymeric prodrugs released major fraction of the parent drug (ibuprofen) and a small fraction of hydroxy ethyl derivatives after 48 hr. In HET-PEG, the amount of drug release was higher than HEE-PEG and HEA-PEG. The difference between acidic and alkali buffered solutions was considerable. In human plasma, 50% of drug was released after 150 hr incubation at 37 degrees C from HET-PEG.
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Affiliation(s)
- Soodabeh Davaran
- Drug Applied Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran.
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Peng YS, Lin SC, Huang SJ, Wang YM, Lin YJ, Wang LF, Chen JS. Chondroitin sulfate-based anti-inflammatory macromolecular prodrugs. Eur J Pharm Sci 2006; 29:60-9. [PMID: 16831535 DOI: 10.1016/j.ejps.2006.05.010] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2006] [Revised: 04/24/2006] [Accepted: 05/29/2006] [Indexed: 10/24/2022]
Abstract
Macromolecular prodrugs of three non-steroidal anti-inflammatory drugs (NSAIDs), ibuprofen, ketoprofen, and naproxen, were prepared by the covalent attachment of the drugs onto chondroitin sulfate (ChS) using PEG 1000 as a spacer. Drug-PEG adducts were synthesized using 1,1'-carbonyl diimidazole as a coupling agent in dimethyl sulfoxide, followed by the reaction with ChS in highly dilute aqueous solution at pH 6.8 via N-(3-dimethylaminopropyl)-N'-ethylcarbodiimide hydrochloride (EDAC) as a conjugation agent. The drug-ChS conjugates were confirmed by FTIR, 1H NMR and 13C NMR and the molar percent of drug substitution onto ChS was characterized by 1H NMR using the peak areas of the three protons of -PhiCHCH3 on the drugs to those of -NHCOCH3 on ChS. All drug-ChS conjugates are water-soluble. The release amounts of the free drugs from their corresponding drug-ChS conjugates were evaluated in the presence or absence of either esterase or chondroitinase, and the both enzymes in pH 7.4 Tris-buffer solutions at 37 degrees C by high performance liquid chromatography (HPLC). Keto-ChS conjugates released approximately 100% ketoprofen within 12h in the presence of esterase, but the combination with chondroitinase did not accelerate the release rate. The degradation of Keto-ChS conjugates by chondroitinase was confirmed by gel permeation chromatography (GPC). The Keto-ChS conjugates still retained the enzymatic recognition even at the substitution of ketoprofen as high as 56 mol%. The inhibition percent of carrageenan-induced edema of Keto-ChS-56 was comparable to that of a simple blend of ChS and ketoprofen, suggesting that biologically active ChS and ketoprofen could be liberated from the conjugate.
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Affiliation(s)
- Yu-Shiang Peng
- College of Life Science, Kaohsiung Medical University, Kaohsiung, Taiwan, ROC
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