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Akhgari A, Abbaspour M, Moradkhanizadeh M. Combination of Pectin and Eudargit RS and Eudragit RL in the Matrix of Pellets Prepared by Extrusion-Spheronization for Possible Colonic Delivery of 5-Amino Salicylic Acid. Jundishapur J Nat Pharm Prod 2013; 8:86-92. [PMID: 24624194 PMCID: PMC3941906] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2012] [Revised: 10/13/2012] [Accepted: 10/17/2012] [Indexed: 11/29/2022] Open
Abstract
BACKGROUND Different methods have been studied for targeting drugs to the colon, such as pH-based, time dependent and bacterially degradable systems. However, due to variations in physiological conditions of patients, one system alone could not be completely reliable on colonic drug delivery. OBJECTIVES The aim of this study was preparation and evaluation of a novel colon-specific drug delivery system for 5-ASA (mesalazine) pellets using pectin as a microbially degradable polymeric carrier and Eudragit RS (ERS) and Eudragit RL (ERL) as time-dependent polymers. MATERIALS AND METHODS Formulations were constructed based on a multilevel full factorial design. Pellets were prepared via extrusion - spheronization and evaluated for physicochemical properties, image analysis, SEM, FT-IR, DSC and in vitro drug release studies in the simulated gastric fluid with pH = 1.2 (SGF), simulated intestinal fluid with pH = 6.8 (SIF) and simulated colonic fluid with pH = 6.8 in presence of pectinolytic enzyme (SCF). RESULTS It was shown that in the presence of pectin, formulations without ERL had a relative resistance to drug release in SGF. Pellets containing pectin and the least amount of ERS had the highest burst release effect in SCF. On the other hand, increasing in amount of ERS in the formulations caused a sustained drug release. Presence of pectin in formulations containing ERS and ERL caused sensitivity of formulations to pectinolytic enzyme which can suitable for a colon specific drug delivery system. CONCLUSIONS It was shown that combination of pectin and eudragits can relatively control drug release in the upper GI. On the other hand, pectin degraded in the presence of pectinase and formulations were susceptible to the colonic media.
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Affiliation(s)
- Abbas Akhgari
- Nanotechnology Research Center and School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
| | - Mohammadreza Abbaspour
- Nanotechnology Research Center and School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran,Corresponding author: Mohammadreza Abbaspour, Nanotechnology Research Center and School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran. Tel./Fax: +98-6113738381, E-mail:
| | - Meysam Moradkhanizadeh
- Nanotechnology Research Center and School of Pharmacy, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, IR Iran
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102
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Zhuang X, Shi L, Zhang B, Cheng B, Kang W. Coaxial solution blown core-shell structure nanofibers for drug delivery. Macromol Res 2012. [DOI: 10.1007/s13233-013-1039-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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103
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Liu J, Zhang L, Jia Y, Hu W, Zhang J, Jiang H. Preparation and evaluation of pectin-based colon-specific pulsatile capsule in vitro and in vivo. Arch Pharm Res 2012; 35:1927-34. [DOI: 10.1007/s12272-012-1109-4] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2012] [Revised: 04/15/2012] [Accepted: 05/18/2012] [Indexed: 11/28/2022]
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104
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Saphier S, Haft A, Margel S. Bacterial Reduction as Means for Colonic Drug Delivery: Can Other Chemical Groups Provide an Alternative to the Azo Bond? J Med Chem 2012; 55:10781-5. [DOI: 10.1021/jm301381a] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Sigal Saphier
- Department of Organic Chemistry, Israel Institute for Biological Research, P.O. Box
19, Ness Ziona 74100, Israel
| | - Avital Haft
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan 52900, Israel
| | - Shlomo Margel
- Department of Chemistry, Bar-Ilan Institute of Nanotechnology and Advanced Materials, Ramat-Gan 52900, Israel
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105
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Lai H, Lin K, Zhang W, Zhang Z, Jie L, Wu Y, He Q. Development of pH- and enzyme-controlled, colon-targeted, pulsed delivery system of a poorly water-soluble drug: preparation and in vitro evaluation. Drug Dev Ind Pharm 2012; 36:81-92. [PMID: 19640246 DOI: 10.3109/03639040903092335] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
BACKGROUND As conventional pH-controlled colon-targeted system used for oral drug delivery often shows a poor performance, a more effective way to preserve poorly water-soluble drug from releasing in upper gastrointestinal tract should be researched. METHOD The objective of this study was to develop a novel colon-targeted drug delivery system using guar gum and Eudragit as enzyme- and pH-based materials. Lansoprazole, a poorly water-soluble drug was used as model drug. Under three different conditions, the in vitro drug release behaviors of this newly developed system was evaluated, using β-mannanase, rat cecal content, and human fecal media to simulate the pH and enzyme during intestinal transit to the colon. RESULTS The released amount of lansoprazole in simulated small intestine fluid (pH 6.8) after 5 hours was less than 10% from the pH- and enzyme-controlled tablets compared with 80.01±0.3% in rat cecal content medium (pH 7.4).The degradation ability of human fecal slurries on PECCT-PT was independent of human age and gender. β-Mannanase did not have a similar effect on the degradation of polysaccharide as rat cecal enzymes and human fecal enzymes in our study. Scanning electron microscope study indicated that the dissolution mechanism of PECCT-PT should be corrosion. CONCLUSION The above results indicated this system could be served as a potential carrier to deliver poorly water-soluble drug specifically to the colon.
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Affiliation(s)
- Huiming Lai
- Key Laboratory of Drug Targeting, Ministry of Education, Sichuan University, Chengdu, PR China
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106
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Xiao B, Merlin D. Oral colon-specific therapeutic approaches toward treatment of inflammatory bowel disease. Expert Opin Drug Deliv 2012; 9:1393-407. [PMID: 23036075 DOI: 10.1517/17425247.2012.730517] [Citation(s) in RCA: 96] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
INTRODUCTION Inflammatory bowel disease (IBD) is a chronic relapsing idiopathic disease. In clinical terms, most patients require lifelong medication associated with possible unpleasant adverse effects. Oral colon-specific drug delivery systems are designed to deliver therapeutic drugs to the inflamed colon to target pathophysiological manifestations of IBD. The aim is to maintain the drug with proper concentration in the inflamed colon, to enhance drug residence time and to minimize drug absorption by healthy tissues. AREAS COVERED This review addresses the main barriers for colon-specific drug delivery from organism, tissue and cell levels, respectively. It also summarizes novel colon-specific therapeutic strategies using microparticles and nanoparticles. EXPERT OPINION Oral colon-specific drug delivery represents a possible approach toward efficient treatment of IBD. As the environment of the gastrointestinal tract is harsh and intricate, this approach requires that drug carriers can respond to specific environmental factors of the inflamed colon, permitting stimulus-responsive release of loaded drugs to specific cells or even into specific organelles within cells.
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Affiliation(s)
- Bo Xiao
- Center for Diagnostics and Therapeutics, Department of Biology, Georgia State University, Atlanta, 30302, USA.
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107
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Vong LB, Tomita T, Yoshitomi T, Matsui H, Nagasaki Y. An orally administered redox nanoparticle that accumulates in the colonic mucosa and reduces colitis in mice. Gastroenterology 2012; 143:1027-36.e3. [PMID: 22771506 DOI: 10.1053/j.gastro.2012.06.043] [Citation(s) in RCA: 141] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Revised: 06/06/2012] [Accepted: 06/28/2012] [Indexed: 02/06/2023]
Abstract
BACKGROUND & AIMS Drugs used to treat patients with ulcerative colitis are not always effective because of nonspecific distribution, metabolism in the gastrointestinal tract, and side effects. We designed a nitroxide radical-containing nanoparticle (RNP(O)) that accumulates specifically in the colon to suppress inflammation and reduce the undesirable side effects of nitroxide radicals. METHODS RNP(O) was synthesized by assembly of an amphiphilic block copolymer that contains stable nitroxide radicals in an ether-linked hydrophobic side chain. Biodistribution of RNP(O) in mice was determined from radioisotope and electron spin resonance measurements. The effects of RNP(O) were determined in mice with dextran sodium sulfate (DSS)-induced colitis and compared with those of low-molecular-weight drugs (4-hydroxyl-2,2,6,6-tetramethylpiperidine-1-oxyl [TEMPOL] or mesalamine). RESULTS RNP(O), with a diameter of 40 nm and a shell of poly(ethylene glycol), had a significantly greater level of accumulation in the colonic mucosa than low-molecular-weight TEMPOL or polystyrene latex particles. RNP(O) was not absorbed into the bloodstream through the intestinal wall, despite its long-term retention in the colon, which prevented its distribution to other parts of the body. Mice with DSS-induced colitis had significantly lower disease activity index and less inflammation following 7 days of oral administration of RNP(O) compared with mice with DSS-induced colitis or mice given low-molecular-weight TEMPOL or mesalamine. CONCLUSIONS We designed an orally administered RNP(O) that accumulates specifically in the colons of mice with colitis and is more effective in reducing inflammation than low-molecular-weight TEMPOL or mesalamine. RNP(O) might be developed for treatment of patients with ulcerative colitis.
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Affiliation(s)
- Long Binh Vong
- Department of Materials Science, Graduate School of Pure and Applied Sciences, University of Tsukuba, Tsukuba, Japan
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108
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Latif R. Zero-order release profile of metoclopramide hydrochloride sublingual tablet formulation. Pharm Dev Technol 2012; 18:1372-8. [DOI: 10.3109/10837450.2012.717950] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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109
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Drug delivery to inflamed colon by nanoparticles: comparison of different strategies. Int J Pharm 2012; 440:3-12. [PMID: 22820482 DOI: 10.1016/j.ijpharm.2012.07.017] [Citation(s) in RCA: 123] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2012] [Revised: 07/10/2012] [Accepted: 07/11/2012] [Indexed: 12/12/2022]
Abstract
For inflammatory bowel disease (IBD) treatment, local delivery of molecules loaded in nanoparticles to the inflamed colon could be a promising strategy. The aim of this study was to investigate how drug-loaded polymeric nanoparticles target the site of inflammation and to analyse the influence of different colon-specific delivery strategies. Three different polymeric nanoparticles were formulated using ovalbumin (OVA) as a model drug. pH-sensitive nanoparticles were made with Eudragit(®) S100. Mucoadhesive nanoparticles were created with trimethylchitosan (TMC). A mix of polymers, PLGA, PEG-PLGA and PEG-PCL, were used to obtain a sustained drug delivery. Furthermore, ligands targeting immune cells (i.e. mannose) or the inflamed colon (i.e. a specific peptide) were grafted on the PEG chain of PCL. Interaction of nanoparticles with the intestinal epithelium was explored using Caco-2 monolayers designed to mimic an inflamed epithelium and then visualized using confocal laser microscopy. TMC nanoparticles had the highest apparent permeability for OVA in the untreated model. However, in the inflamed model, there were no difference between TMC, PLGA-based and Eudragit(®) nanoparticles. The uptake of nanoparticles in the inflamed mouse colon was assessed in a horizontal diffusion chamber. Mannose-grafted PLGA nanoparticles showed the highest accumulation of OVA in inflamed colon. Based on these results, active targeting of macrophages and dendritic cells may be a promising approach for targeting the colon in IBD.
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110
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Krishnaiah YSR, Khan MA. Strategies of targeting oral drug delivery systems to the colon and their potential use for the treatment of colorectal cancer. Pharm Dev Technol 2012; 17:521-40. [PMID: 22681390 DOI: 10.3109/10837450.2012.696268] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Colorectal cancer (CRC) is the third most common cause of cancer-related death in both men and women. Often, surgical intervention remains the choice in treating CRC. Traditional dosage forms used for treating CRC deliver drug to wanted as well as unwanted sites of drug action resulting in several adverse side effects. Targeted oral drug delivery systems are being investigated to target and deliver chemotherapeutic and chemopreventive agents directly to colon and rectum. Site-specific delivery of a drug to colon increases its concentration at the target site, and thus requires a lower dose with reduced incidence of side effects. The major obstacle to be overcome for successful targeting of drug to colon through oral route is that drug absorption/degradation must be avoided in stomach and small intestine before the dosage form reaches colon. The review includes discussion of physiological factors that must be considered when targeting drugs directly to colorectal region, an outline on drugs used for treatment and prevention of CRC, and a brief description of various types of colon-targeted oral drug delivery systems. The focus is on the assessment of various formulation approaches being investigated for oral colon-specific delivery of drugs used in the treatment and prevention of CRC.
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Affiliation(s)
- Yellela S R Krishnaiah
- Division of Product Quality Research, Office of Testing and Research, Office of Pharmaceutical Science, Center for Drug Evaluation and Research, Food and Drug Administration, Silver Springs, MD 20993, USA.
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111
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Bioadhesive pellets increase local 5-aminosalicylic acid concentration in experimental colitis. Eur J Pharm Biopharm 2012; 81:379-85. [DOI: 10.1016/j.ejpb.2012.02.011] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2011] [Revised: 02/11/2012] [Accepted: 02/14/2012] [Indexed: 01/13/2023]
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112
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A novel preparation method for 5-aminosalicylic acid loaded Eudragit S100 nanoparticles. Int J Mol Sci 2012; 13:6454-6468. [PMID: 22754377 PMCID: PMC3382771 DOI: 10.3390/ijms13056454] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2012] [Revised: 04/22/2012] [Accepted: 05/22/2012] [Indexed: 11/29/2022] Open
Abstract
In this study, solution enhanced dispersion by supercritical fluids (SEDS) technique was applied for the preparation of 5-aminosalicylic acid (5-ASA) loaded Eudragit S100 (EU S100) nanoparticles. The effects of various process variables including pressure, temperature, 5-ASA concentration and solution flow rate on morphology, particle size, 5-ASA loading and entrapment efficiency of nanoparticles were investigated. Under the appropriate conditions, drug-loaded nanoparticles exhibited a spherical shape and small particle size with narrow particle size distribution. In addition, the nanoparticles prepared were characterized by X-ray diffraction, Differential scanning calorimetry and Fourier transform infrared spectroscopy analyses. The results showed that 5-ASA was imbedded into EU S100 in an amorphous state after SEDS processing and the SEDS process did not induce degradation of 5-ASA.
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113
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Maroni A, Zema L, Del Curto MD, Foppoli A, Gazzaniga A. Oral colon delivery of insulin with the aid of functional adjuvants. Adv Drug Deliv Rev 2012; 64:540-56. [PMID: 22086142 DOI: 10.1016/j.addr.2011.10.006] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2011] [Revised: 09/30/2011] [Accepted: 10/27/2011] [Indexed: 12/11/2022]
Abstract
Oral colon delivery is currently considered of importance not only for the treatment of local pathologies, such as primarily inflammatory bowel disease (IBD), but also as a means of accomplishing systemic therapeutic goals. Although the large bowel fails to be ideally suited for absorption processes, it may indeed offer a number of advantages over the small intestine, including a long transit time, lower levels of peptidases and higher responsiveness to permeation enhancers. Accordingly, it has been under extensive investigation as a possible strategy to improve the oral bioavailability of peptide and protein drugs. Because of a strong underlying rationale, most of these studies have focused on insulin. In the present review, the impact of key anatomical and physiological characteristics of the colon on its viability as a protein release site is discussed. Moreover, the main formulation approaches to oral colon targeting are outlined along with the design features and performance of insulin-based devices.
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114
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Bajpai SK, Saggu SPS. Controlled release of an anti-malarial drug from a pH-sensitive poly(methacrylamide-co-methacrylic acid) hydrogel system. Des Monomers Polym 2012. [DOI: 10.1163/156855507782401196] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- S. K. Bajpai
- a Polymer Research Laboratory, Department of Chemistry, Government Model Science College, Jabalpur (M.P.) 482001, India
| | - S. Pal Singh Saggu
- b Polymer Research Laboratory, Department of Chemistry, Government Model Science College, Jabalpur (M.P.) 482001, India
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115
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Patel MM, Amin AF. Development of a novel tablet-in-capsule formulation of mesalamine for inflammatory bowel disease. Pharm Dev Technol 2012; 18:390-400. [DOI: 10.3109/10837450.2011.653819] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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116
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Prezotti FG, Meneguin AB, Evangelista RC, Ferreira Cury BS. Preparation and characterization of free films of high amylose/pectin mixtures cross-linked with sodium trimetaphosphate. Drug Dev Ind Pharm 2012; 38:1354-9. [DOI: 10.3109/03639045.2011.650863] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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117
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Preparation of konjac glucomannan-based pulsatile capsule for colonic drug delivery system and its evaluation in vitro and in vivo. Carbohydr Polym 2012; 87:377-382. [DOI: 10.1016/j.carbpol.2011.07.062] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Revised: 07/24/2011] [Accepted: 07/28/2011] [Indexed: 11/20/2022]
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118
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Maestrelli F, Cirri M, Mennini N, Bragagni M, Zerrouk N, Mura P. Influence of cross-linking agent type and chitosan content on the performance of pectinate-chitosan beads aimed for colon-specific drug delivery. Drug Dev Ind Pharm 2011; 38:1142-51. [DOI: 10.3109/03639045.2011.641566] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
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119
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Mustafin RI, Kabanova TV, Semina II, Bukhovets AV, Garipova VR, Shilovskaya EV, Nasibullin SF, Sitenkov AY, Kazakova RR, Kemenova VA. Biopharmaceutical assessment of a polycomplex matrix system based on carbomer 940 and Eudragit® EPO for colon-specific drug delivery. Pharm Chem J 2011. [DOI: 10.1007/s11094-011-0662-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/15/2022]
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120
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Layered lipid microcapsules for mesalazine delayed-release in children. Int J Pharm 2011; 421:293-300. [DOI: 10.1016/j.ijpharm.2011.09.043] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2011] [Revised: 09/22/2011] [Accepted: 09/27/2011] [Indexed: 01/29/2023]
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121
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Trombino S, Cassano R, Cilea A, Ferrarelli T, Muzzalupo R, Picci N. Synthesis of pro-prodrugs l-lysine based for 5-aminosalicylic acid and 6-mercaptopurine colon specific release. Int J Pharm 2011; 420:290-6. [DOI: 10.1016/j.ijpharm.2011.09.001] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/17/2011] [Accepted: 09/01/2011] [Indexed: 10/17/2022]
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122
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Kenawy ER, Aly ES, Imam Abdel-Hay F, Abdeen R, Mahmoud YAG. Synthesis and microbial degradation of azopolymers for possible applications for colon specific drug delivery I. JOURNAL OF SAUDI CHEMICAL SOCIETY 2011. [DOI: 10.1016/j.jscs.2011.07.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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123
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Tailoring of drug delivery of 5-fluorouracil to the colon via a mixed film coated unit system. ACTA PHARMACEUTICA 2011; 61:343-51. [PMID: 21945913 DOI: 10.2478/v10007-011-0023-5] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
The study was carried out to establish the effectiveness of a mixed film composed of ethylcellulose/Eudragit S100 for colonic delivery of 5-flourouracil (5-FU). Tablets cores containing 5-FU were prepared by direct compression method by coating at different levels (2-9%, m/m) with a non-aqueous solution containing ethylcellulose/Eudragit S100. Coated tablets were studied for the in vitro release of 5-FU and the samples were analyzed spectrophotometrically at 266 nm. Drug release from coated systems depended on the thickness of the mixed film and the composition of the core. Channel formation was initiated in the coat by dissolution of the Eudragit S100 fraction at higher pH in the colonic region. The release was found to be higher in tablets containing Avicel as filler owing to its wicking action compared to that from lactose containing cores. Furthermore, batches containing superdisintegrant (1%, m/m Cross-PVP) along with Avicel in the core released approximately 81.1% drug during the colonic transit time. Kinetic studies indicated that all the formulations followed first-order release kinetics. The developed delivery system will expectedly deliver the drug to the colon.
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124
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Chaturvedi K, Kulkarni AR, Aminabhavi TM. Blend Microspheres of Poly(3-hydroxybutyrate) and Cellulose Acetate Phthalate for Colon Delivery of 5-Fluorouracil. Ind Eng Chem Res 2011. [DOI: 10.1021/ie2011005] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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125
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Kong H, Kim H, Do H, Lee Y, Hong S, Yoon JH, Jung Y, Kim YM. Structural effects of N-aromatic acyl-amino acid conjugates on their deconjugation in the cecal contents of rats: implication in design of a colon-specific prodrug with controlled conversion rate at the target site. Biopharm Drug Dispos 2011; 32:343-54. [PMID: 21800327 DOI: 10.1002/bdd.763] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2011] [Revised: 05/31/2011] [Accepted: 06/16/2011] [Indexed: 11/06/2022]
Affiliation(s)
- Hyesik Kong
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Hyunjeong Kim
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Heejeong Do
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Yonghyun Lee
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Sungchae Hong
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Jeong-Hyun Yoon
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Yunjin Jung
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
| | - Young Mi Kim
- Laboratory of Biomedicinal Chemistry, College of Pharmacy; Pusan National University; Busan; Republic of Korea
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126
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Singhal A, Jain H, Singhal V, Elias EJ, Showkat A. Colon-targeted quercetin delivery using natural polymer to enhance its bioavailability. Pharmacognosy Res 2011; 3:35-9. [PMID: 21731393 PMCID: PMC3119269 DOI: 10.4103/0974-8490.79113] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2010] [Revised: 06/15/2010] [Accepted: 04/07/2011] [Indexed: 11/04/2022] Open
Abstract
The aim of the present study is to develop a polymer (Guar Gum)-based matrix tablet (using quercetin as a model drug) with sufficient mechanical strength, and promising in vitro mouth-to-colon release profile. By definition, an oral colonic delivery system should retard drug release in the stomach and small intestine, and allow complete release in the colon. By drug delivery to the colon would therefore ensure direct treatment at the disease site, lower dosing, and fewer systemic side effects. Quercetin is antioxidant in nature and used to treat colon cancer, but they have poor absorption in the upper part of the gastrointestinal tract (GIT). As a site for drug delivery, the colon offers a near neutral pH, reduced digestive enzymatic activity, a long transit time, and an increased responsiveness to absorption enhancers. By achieving a colon-targeted drug delivery system, the absorption of quercetin may be increased, which leads to better bioactivity in fewer doses.
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Affiliation(s)
- Anil Singhal
- B. R. Nahata College of Pharmacy, BRNSS-Contract Research Center, Mhow-Neemuch Road, Mandsaur, Madhya Pradesh, India
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127
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Das S, Chaudhury A, Ng KY. Polyethyleneimine-modified pectin beads for colon-specific drug delivery:In vitroandin vivoimplications. J Microencapsul 2011; 28:268-79. [DOI: 10.3109/02652048.2011.559284] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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128
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Kshirsagar SJ, Bhalekar MR, Shewale NS, Godbole VP, Jagdale PK, Mohapatra SK. Development of enzyme-controlled colonic drug delivery using amylose and hydroxypropyl methylcellulose: Optimization by factorial design. Drug Deliv 2011; 18:385-93. [DOI: 10.3109/10717544.2011.567308] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Krenzlin S, Siepmann F, Wils D, Guerin-Deremaux L, Flament MP, Siepmann J. Non-coated multiparticulate matrix systems for colon targeting. Drug Dev Ind Pharm 2011; 37:1150-9. [PMID: 21417601 DOI: 10.3109/03639045.2011.562214] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
BACKGROUND Colon specific drug delivery can significantly improve the efficacy of local treatments of inflammatory bowel diseases. Film coatings containing the starch derivative Nutriose have recently been reported to minimize 5-ASA release in media simulating the upper gastro intestinal tract (GIT), while releasing the drug in a time-controlled manner upon contact with feces from Crohn's Disease and Ulcerative Colitis patients. It was the aim of this study to prepare Nutriose-containing matrix pellets and mini tablets in order to avoid a film coating step. METHODS Highly dosed matrix pellets were prepared by extrusion-spheronization, highly dosed mini tablets by compression. Various types of lipids were added and drug release measured in 0.1 N HCl and phosphate buffer pH 6.8, optionally containing pepsin and pancreatin. RESULTS The type of added lipid and the preparation technique, in particular the curing conditions, significantly affected the resulting drug release kinetics. Glyceryl palmitostearate containing pellets and mini tablets showed the most promising results upon appropriate curing, minimizing premature drug release in media simulating the upper GIT. CONCLUSION The proposed novel multiparticulates do not require a film coating step and show an interesting potential for site-specific drug delivery to the colon of inflammatory bowel disease patients.
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Affiliation(s)
- S Krenzlin
- Université Lille Nord de France, College of Pharmacy, France
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130
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Das S, Chaudhury A, Ng KY. Preparation and evaluation of zinc–pectin–chitosan composite particles for drug delivery to the colon: Role of chitosan in modifying in vitro and in vivo drug release. Int J Pharm 2011; 406:11-20. [DOI: 10.1016/j.ijpharm.2010.12.015] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2010] [Revised: 11/24/2010] [Accepted: 12/13/2010] [Indexed: 10/18/2022]
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131
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Jiang JX, Jian HL, Cristhian C, Zhang WM, Sun RC. Structural and thermal characterization of galactomannans from genus Gleditsia seeds as potential food gum substitutes. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2011; 91:732-737. [PMID: 21213227 DOI: 10.1002/jsfa.4243] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2010] [Revised: 10/28/2010] [Accepted: 10/28/2010] [Indexed: 05/30/2023]
Abstract
BACKGROUND Seed galactomannans are preferred hydrocolloids since they are comparatively cheap, non-toxic, eco-friendly and non-polluting during production and application. Galactomannans from seeds of three species of Gleditsia, namely G. sinensis, G. microphylla and G. melanacantha, were characterized in terms of structural and thermal properties. RESULTS Gleditsia polysaccharides were characterized using both chemical and chromatographic methods, as well as Fourier transform infrared, (1) H nuclear magnetic resonance (NMR) and (13) C NMR spectroscopy, and it was shown that they consist of D-mannopyranose and D-galactopyranose residues. The mannose/galactose (M/G) ratio of galactomannans was 3.25, 3.31 and 2.30, respectively. It was also found that these polysaccharides differ from one another in values of M(w) , M(n) and polydispersity. X-ray diffraction confirmed the amorphous nature of Gleditsia galactomannans, although G. sinensis galactomannan showed a high crystallinity. Thermal analysis of the galactomannans by differential scanning calorimetry illustrated that their endothermic peaks ranged from 290 to 320 °C. CONCLUSION Gleditsia polysaccharides are neutral galactomannans. The higher value of M/G ratio from G. sinensis and G. microphylla indicates that their gums offer an excellent alternative for locus bean gum.
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Affiliation(s)
- Jian-Xin Jiang
- Department of Chemistry and Chemical Engineering, Beijing Forestry University, Beijing 100083, China.
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132
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Das S, Ng KY. Impact of glutaraldehyde on in vivo colon-specific release of resveratrol from biodegradable pectin-based formulation. J Pharm Sci 2011; 99:4903-16. [PMID: 20572052 DOI: 10.1002/jps.22212] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Abstract
Despite potential therapeutic efficacy of resveratrol on colitis and colorectal cancer, rapid absorption and metabolism at the upper gastro-intestinal (GI) tract prevent its clinical application. To overcome this, we attempted to develop colon-specific multi-particulate calcium-pectinate (Ca-pectinate) formulations of resveratrol. However, they were unable to prevent premature drug release at the upper GI tract. Thus, glutaraldehyde (Glu) was used for further cross-linking of the pectin chains. The formulation conditions and procedure were optimized from the in vitro drug release study. The optimized formulation was subjected to in vivo pharmacokinetic study in rats and compared with the unmodified Ca-pectinate and suspension formulation of resveratrol. Spherical particles (∼1 mm diameter) with high drug encapsulation were produced. Low cross-linking solution pH (1.5), minimum Glu concentration (2.5%) and cross-linking time (2 h) were crucial to exhibit colon-specific drug release. As Glu was added in the cross-linking solution, cross-linking between pectin chains and Glu occurred simultaneously during Ca-pectinate network formation, which appeared as a cost-effective formulation technique. Most importantly, the pharmacokinetic study demonstrated in vivo colon-specific drug release from the optimized formulation, while faster drug release was observed from the unmodified and suspension formulations. Hence, the developed formulation has potential to be used as colon-specific delivery system of resveratrol.
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Affiliation(s)
- Surajit Das
- Department of Pharmacy, National University of Singapore, 18 Science Drive 4, Singapore 117543, Republic of Singapore.
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133
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Gavini E, Spada G, Rassu G, Cerri G, Brundu A, Cossu M, Sorrenti M, Giunchedi P. Development of solid nanoparticles based on hydroxypropyl-β-cyclodextrin aimed for the colonic transmucosal delivery of diclofenac sodium. J Pharm Pharmacol 2011; 63:472-82. [DOI: 10.1111/j.2042-7158.2010.01220.x] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Abstract
Objectives
Nanoparticles were designed for the oral administration and transmucosal colon delivery of drugs.
Methods
Preparation parameters were studied in order to develop solid pH-dependent drug-release nanoparticles, constituted by hydroxypropyl-β-cyclodextrin and/or Eudragit® L100 loaded with diclofenac sodium. Nanoemulsions were prepared by the emulsion-evaporation method using various homogenizers. Different preparative conditions were tested. The emulsions obtained were analysed in terms of size and then dried to obtain solid nanoparticles which were characterized in vitro (particle size, morphology, dissolution, solid state characterization). The effect of nanoparticles on drug permeation through synthetic membranes, colonic pig mucosa and Caco2 cell line were performed. Toxicity studies were carried out to assess the safety of the raw materials used and the nanosystems produced.
Key findings
Appropriate parameters to obtain nanoemulsions stable enough to be desiccated were determined: Panda NS100L was the most suitable homogenizer for the preparation; particle size ranged between 100 and 600 nm depending on the production method. Solid nanoparticles were obtained by an exsiccation process, which does not modify the mean size. pH-dependent drug-release nanoparticles were obtained. The nanoencapsulation process decreased the crystallinity of the drug. Materials and nanoparticles were highly biocompatible. Transmucosal delivery of drug is dependent on the polymer and the test employed: cyclodextrin improved drug permeation across colonic pig mucosa.
Conclusions
Formulations containing hydroxypropyl-β-cyclodextrin represent new colon-targeted nanoparticles for transmucosal delivery of drugs.
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Affiliation(s)
- Elisabetta Gavini
- Dipartimento di Scienze del Farmaco, University of Sassari, Via Muroni, Italy
| | - Gianpiera Spada
- Dipartimento di Scienze del Farmaco, University of Sassari, Via Muroni, Italy
| | - Giovanna Rassu
- Dipartimento di Scienze del Farmaco, University of Sassari, Via Muroni, Italy
| | - Guido Cerri
- Dipartimento di Scienze Botaniche, Ecologiche e Geologiche, University of Sassari, Via Piandanna, Sassari, Italy
| | - Antonio Brundu
- Dipartimento di Scienze Botaniche, Ecologiche e Geologiche, University of Sassari, Via Piandanna, Sassari, Italy
| | - Massimo Cossu
- Dipartimento di Scienze del Farmaco, University of Sassari, Via Muroni, Italy
| | - Milena Sorrenti
- Dipartimento di Chimica Farmaceutica, University of Pavia, Via Taramelli, Pavia, Italy
| | - Paolo Giunchedi
- Dipartimento di Scienze del Farmaco, University of Sassari, Via Muroni, Italy
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134
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Huanbutta K, Sriamornsak P, Limmatvapirat S, Luangtana-anan M, Yoshihashi Y, Yonemochi E, Terada K, Nunthanid J. Swelling kinetics of spray-dried chitosan acetate assessed by magnetic resonance imaging and their relation to drug release kinetics of chitosan matrix tablets. Eur J Pharm Biopharm 2011; 77:320-6. [DOI: 10.1016/j.ejpb.2010.11.019] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2010] [Revised: 11/22/2010] [Accepted: 11/24/2010] [Indexed: 11/29/2022]
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135
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Rabito MF, Reis AV, Freitas ADR, Tambourgi EB, Cavalcanti OA. A pH/enzyme-responsive polymer film consisting of Eudragit FS 30 D and arabinoxylane as a potential material formulation for colon-specific drug delivery system. Pharm Dev Technol 2011; 17:429-36. [PMID: 21222512 DOI: 10.3109/10837450.2010.546409] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Polymer film based on pH-dependent Eudragit FS 30 D acrylic polymer in association with arabinoxylane, a polysaccharide issued from gum psyllium, was produced by way of solvent casting. Physical-chemical characterization of the polymer film samples was performed by means of thermogravimetry (TGA), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM). Furthermore, water-equilibrium swelling index (I(s)) and weight loss of the films in KCl buffer solution of pH 1.2, in KH(2)PO(4) buffer solution of pH 5.0, or in KH(2)PO(4) buffer solution of pH 5.0 consisting of 4% enzyme Pectinex 3X-L (w/v) were also carried out for the film characterization. No chemical interactions between the Eudragit FS 30 D and the arabinoxylane polymer chains were evidenced, thus suggesting that the film-forming polymer structure was obtained from a physical mixture of both polymers. The arabinoxylane-loader films showed a more pronounced weight loss after their immersion in buffer solution containing enzyme Pectinex 3X-L. The introduction of the arabinoxylane makes the film more susceptible to undergo an enzymatic degradation. This meant that the enzyme-dependent propriety issued from the arabinoxylane has been imprinted into the film formulation. This type of polymer film is an interesting system for applications in colon-specific drug delivery system.
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Affiliation(s)
- Mirela Fulgencio Rabito
- Laboratório de FarmacoTecnologia, Departamento de Farmacologia e Terapeutica Programa de Pós-graduação em Ciências Farmacêuticas, Maringá 87020-900, Brazil
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136
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Luo JY, Zhong Y, Cao JC, Cui HF. Efficacy of oral colon-specific delivery capsule of low-molecular-weight heparin on ulcerative colitis. Biomed Pharmacother 2010; 65:111-7. [PMID: 21227626 DOI: 10.1016/j.biopha.2010.12.013] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2010] [Accepted: 12/07/2010] [Indexed: 01/11/2023] Open
Abstract
Low-molecular-weight heparin has the potential for the treatment of ulcerative colitis, and targeted drug delivery to the colon is important for topical treatment of this disease, so low-molecular-weight heparin oral colon-specific delivery capsule was prepared, and the in vitro and in vivo drug release behavior was investigated. The macroscopical and histological scoring systems, wet colon mass index and myeloperoxidase activity were assessed to evaluate the efficacy of the capsule after administered orally to experimental colitis mice. Serum levels, including tumor necrosis factor-α (TNF-α), interleukin-6 (IL-6) and a link factor of blood coagulation and inflammation factor Xa (FXa) were assayed by enzyme-linked immunosorbent assay. The expression of Musashi-1 (as an intestinal stem cell marker) in the colons was assessed by immunohistochemical analysis. The in vitro and in vivo drug release studies clearly indicated that the specific coated capsules were capable of protecting low-molecular-weight heparin from releasing in stomach and small intestine, while specifically delivering at colon. The oral colon-specific delivery capsule of low-molecular-weight heparin could attenuate macroscopic and histological features of colitis. The results showed that low-molecular-weight heparin oral colon-specific delivery capsule significantly decreased the serum levels of TNF-α, IL-6 as well as FXa, while increased the expression of Musashi-1 in colon compared with acetic acid-induced ulcerative colitis model group. The results showed that low-molecular-weight heparin oral colon-specific delivery capsule had the potential for treatment of inflammatory bowel disease.
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Affiliation(s)
- Jun-Yong Luo
- Institute of Biochemical and Biotechnological Drugs, Shandong University, Jinan 250012, China
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137
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Dahan A, Amidon GL, Zimmermann EM. Drug targeting strategies for the treatment of inflammatory bowel disease: a mechanistic update. Expert Rev Clin Immunol 2010; 6:543-50. [PMID: 20594127 DOI: 10.1586/eci.10.30] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The therapeutic management of inflammatory bowel disease (IBD) represents the perfect scenario for drug targeting to the site(s) of action. While existing formulation-based targeting strategies include rectal dosage forms and oral systems that target the colon by pH-, time-, microflora- and pressure-triggered drug release, novel approaches for site-specific delivery in IBD therapy will target the inflamed intestine per se rather than intestinal region. The purpose of this article is to present a mechanistic update on the strategies employed to achieve minimal systemic exposure accompanied by maximal drug levels in the inflamed intestinal tissue. The introduction of biological agents, micro/nanoparticulate carriers including liposomes, transgenic bacteria, and gene therapy opportunities are discussed, as well as the challenges remaining to be achieved in the targeted treatment of IBD.
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Affiliation(s)
- Arik Dahan
- Department of Clinical Pharmacology, School of Pharmacy, Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 84105, Israel.
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138
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Ahmadi F, Varshosaz J, Emami J, Tavakoli N, Minaiyan M, Mahzouni P, Dorkoosh F. Preparation and in vitro/in vivo evaluation of dextran matrix tablets of budesonide in experimental ulcerative colitis in rats. Drug Deliv 2010; 18:122-30. [DOI: 10.3109/10717544.2010.520352] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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139
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Karrout Y, Neut C, Siepmann F, Wils D, Ravaux P, Deremaux L, Flament MP, Dubreuil L, Lemdani M, Desreumaux P, Siepmann J. Enzymatically degraded Eurylon 6 HP-PG: ethylcellulose film coatings for colon targeting in inflammatory bowel disease patients. J Pharm Pharmacol 2010; 62:1676-84. [DOI: 10.1111/j.2042-7158.2010.01165.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Abstract
Objectives
Film coatings based on blends of Eurylon 6 HP-PG (a hydroxypropylated and pregelatinized high amylose starch) and ethylcellulose were to be evaluated as promising coating materials for site-specific drug delivery to the colon of patients suffering from inflammatory bowel diseases.
Methods
Pellet starter cores containing 60% 5-aminosalicylic acid were prepared by extrusion/spheronization and coated with different Eurylon 6 HP-PG : ethylcellulose blends at various coating levels. Drug release was measured in media simulating the contents of the upper gastrointestinal tract (in the presence and absence of enzymes) as well as in media simulating the contents of the colon.
Key findings
5-Aminosalicylic acid release could effectively be suppressed in 0.1 N HCl and phosphate buffer pH 6.8, optionally containing pepsin or pancreatin, but occurred as soon as the pellets came into contact with culture medium inoculated with faecal samples from inflammatory bowel disease patients. This can be attributed to the partial degradation of the starch derivative by enzymes secreted by bacteria present in the colon of these patients.
Conclusions
The presented drug delivery system is adapted to the pathophysiological conditions in inflammatory bowel disease patients. Furthermore, drug release remained unaltered upon 1 year open storage.
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Affiliation(s)
- Youness Karrout
- College of Pharmacy, Université Lille Nord de France, Lille, France
- INSERM U 1008, Lille, France
| | - Christel Neut
- College of Pharmacy, Université Lille Nord de France, Lille, France
- INSERM U 995, Lille, France
| | - Florence Siepmann
- College of Pharmacy, Université Lille Nord de France, Lille, France
- INSERM U 1008, Lille, France
| | - Daniel Wils
- Roquette, Biology and Nutrition Department, Lestrem, France
| | - Pierre Ravaux
- College of Pharmacy, Université Lille Nord de France, Lille, France
- Laboratory of Biomathematics, Lille, France
| | | | - Marie-Pierre Flament
- College of Pharmacy, Université Lille Nord de France, Lille, France
- INSERM U 1008, Lille, France
| | - Luc Dubreuil
- College of Pharmacy, Université Lille Nord de France, Lille, France
- INSERM U 995, Lille, France
| | - Mohamed Lemdani
- College of Pharmacy, Université Lille Nord de France, Lille, France
- Laboratory of Biomathematics, Lille, France
| | - Pierre Desreumaux
- INSERM U 995, Lille, France
- School of Medicine, Université Lille Nord de France, Lille, France
| | - Juergen Siepmann
- College of Pharmacy, Université Lille Nord de France, Lille, France
- INSERM U 1008, Lille, France
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140
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Oliveira GF, Ferrari PC, Carvalho LQ, Evangelista RC. Chitosan–pectin multiparticulate systems associated with enteric polymers for colonic drug delivery. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.06.041] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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141
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Piai JF, Lopes LC, Fajardo AR, Rubira AF, Muniz EC. Kinetic study of Chondroitin Sulphate release from Chondroitin Sulphate/Chitosan complex hydrogel. J Mol Liq 2010. [DOI: 10.1016/j.molliq.2010.05.017] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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142
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Das S, Ng KY, Ho PC. Design of a pectin-based microparticle formulation using zinc ions as the cross-linking agent and glutaraldehyde as the hardening agent for colonic-specific delivery of resveratrol:In vitroandin vivoevaluations. J Drug Target 2010; 19:446-57. [DOI: 10.3109/1061186x.2010.504272] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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143
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Karrout Y, Neut C, Wils D, Siepmann F, Deremaux L, Flament MP, Dubreuil L, Desreumaux P, Siepmann J. Peas starch-based film coatings for site-specific drug delivery to the colon. J Appl Polym Sci 2010. [DOI: 10.1002/app.32802] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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144
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Das S, Ng KY, Ho PC. Formulation and optimization of zinc-pectinate beads for the controlled delivery of resveratrol. AAPS PharmSciTech 2010; 11:729-42. [PMID: 20440587 DOI: 10.1208/s12249-010-9435-7] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2009] [Accepted: 04/09/2010] [Indexed: 11/30/2022] Open
Abstract
Preventive and therapeutic efficacies of resveratrol on several lower gastrointestinal (GI) diseases (e.g., colorectal cancer, colitis) are well documented. To overcome the problems due to its rapid absorption and metabolism at the upper GI tract, a delayed release formulation of resveratrol was designed to treat these lower GI diseases. The current study aimed to develop a delayed release formulation of resveratrol as multiparticulate pectinate beads by varying different formulation parameters. Zinc-pectinate (Zn-pectinate) beads exhibited better delayed drug release pattern than calcium-pectinate (Ca-pectinate) beads. The effects of the formulation parameters were investigated on shape, size, Zn content, moisture content, drug encapsulation efficiency, swelling-erosion, and resveratrol retention pattern of the formulated beads. Upon optimization of the formulation parameters in relative to the drug release profiles, the optimized beads were further subjected to morphological, chemical interaction, enzymatic degradation, and stability studies. Almost all prepared beads were spherical with approximately 1 mm diameter and efficiently encapsulated resveratrol. The formulation parameters revealed great influence on resveratrol retention and swelling-erosion behavior. In most of the cases, the drug release data more appropriately fitted with zero-order equation. This study demonstrates that the optimized Zn-pectinate beads can encapsulate very high amount of resveratrol and can be used as delayed release formulation of resveratrol.
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145
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Lucinda-Silva RM, Salgado HRN, Evangelista RC. Alginate–chitosan systems: In vitro controlled release of triamcinolone and in vivo gastrointestinal transit. Carbohydr Polym 2010. [DOI: 10.1016/j.carbpol.2010.02.016] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023]
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146
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Kshirsagar SJ, Bhalekar MR, Umap RR. Design, development and in vitro-in vivo study of a colon-specific fast disintegrating tablet. Pharm Dev Technol 2010; 16:449-56. [DOI: 10.3109/10837450.2010.485319] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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147
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Wang K, Xu X, Wang Y, Yan X, Guo G, Huang M, Luo F, Zhao X, Wei Y, Qian Z. Synthesis and characterization of poly(methoxyl ethylene glycol-caprolactone-co-methacrylic acid-co-poly(ethylene glycol) methyl ether methacrylate) pH-sensitive hydrogel for delivery of dexamethasone. Int J Pharm 2010; 389:130-8. [DOI: 10.1016/j.ijpharm.2010.01.026] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2009] [Revised: 01/05/2010] [Accepted: 01/15/2010] [Indexed: 10/19/2022]
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148
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Kotagale N, Maniyar M, Somvanshi S, Umekar M, Patel CJ. Eudragit-S, Eudragit-L and cellulose acetate phthalate coated polysaccharide tablets for colonic targeted delivery of azathioprine. Pharm Dev Technol 2010; 15:431-7. [DOI: 10.3109/10837450903264401] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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149
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Das S, Ng KY. Resveratrol-loaded calcium-pectinate beads: effects of formulation parameters on drug release and bead characteristics. J Pharm Sci 2010; 99:840-60. [PMID: 19653272 DOI: 10.1002/jps.21880] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Resveratrol has potential therapeutic efficacy on several lower gastro-intestinal (GI) diseases such as colitis and colorectal cancer. But resveratrol is quickly absorbed and metabolized at the upper GI tract, which renders it unsuitable for this purpose. This study aimed at devising a delayed release formulation of resveratrol as calcium-pectinate (Ca-pectinate) beads and investigated the impact of various formulation parameters on bead characteristics. Ca-pectinate beads were prepared by varying six formulation parameters (cross-linking pH, cross-linker concentration, cross-linking time, drying condition, pectin concentration, and resveratrol concentration). Their effects were investigated on calcium entrapment, moisture content and weight loss during drying, particle shape and size, resveratrol entrapment and loading efficiency, swelling-erosion, and resveratrol retention pattern of formulated beads. Preparative conditions were optimized from these studies and optimized beads were further subjected to morphological examination, drug-polymer interaction, and enzymatic degradation study. Almost all prepared beads were spherical with approximately 1 mm diameter. Swelling-erosion and drug retention pattern were changed with formulation variables. Release data of almost all beads showed linearity of the plots for the cumulative percent resveratrol released versus square root of time often after an initial lag period. Observations from the present study revealed that optimized Ca-pectinate beads can encapsulate a very high amount of resveratrol (>97.5%) and can be used for delayed release and site-specific delivery to the lower GI tract. Depending on the formulation parameters, release of resveratrol after 10 h incubation in the intestinal media was 80-100%.
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Affiliation(s)
- Surajit Das
- Faculty of Science, Department of Pharmacy, National University of Singapore, Singapore
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150
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Quinteros DA, Manzo RH, Allemandi DA. Design of a colonic delivery system based on cationic polymethacrylate (Eudragit E100)-mesalamine complexes. Drug Deliv 2010; 17:208-13. [DOI: 10.3109/10717541003667806] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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