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Nørgaard Kristensen M, Rades T, Boisen A, Müllertz A. Impact of oral gavage technique of drug-containing microcontainers on the gastrointestinal transit and absorption in rats. Int J Pharm 2022; 618:121630. [PMID: 35245635 DOI: 10.1016/j.ijpharm.2022.121630] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2022] [Revised: 02/27/2022] [Accepted: 02/28/2022] [Indexed: 11/16/2022]
Abstract
Oral gavage is the most common way to administer drug formulations orally to rats. Yet, the technique applied and its influence on gastrointestinal (GI) transit receive little attention. This study aims to investigate the impact of three oral gavage techniques on GI transit and drug absorption utilizing microcontainers (MCs). The MCs were filled with paracetamol and BaSO4 (1:1 w/w ratio), coated with Eudragit S100, and filled into size-9 gelatin capsules. An in vitro study confirmed the intactness of the coating, and the capsules were administered to rats with air, water, or a piston. X-ray imaging determined the locations of the MCs, and the corresponding plasma concentration of paracetamol established a correlation with the location. The fastest GI transit occurred with air-dosing, while water-dosing caused delayed gastric emptying for 3h with non-quantifiable paracetamol absorption. Piston-dosed MCs were retained in the stomach for up to 1h, though for 3h in one rat. Air-dosing caused discomfort and stress in rats, thus limiting its ethical and physiological relevance. Water-dosing confined its use due to delayed gastric emptying. In conclusion, the oral gavage technique affected the GI transit of MCs and, consequently, drug absorption. Piston-dosing appeared to be the superior dosing technique.
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Affiliation(s)
- Maja Nørgaard Kristensen
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Thomas Rades
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark
| | - Anja Boisen
- Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, Ørsteds Plads, 2800 Kgs. Lyngby, Denmark
| | - Anette Müllertz
- Department of Pharmacy, Faculty of Health and Medical Sciences, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark; Bioneer:FARMA, Department of Pharmacy, University of Copenhagen, Universitetsparken 2, 2100 Copenhagen, Denmark.
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2
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Rump A, Weiss FN, Schulz L, Kromrey ML, Scheuch E, Tzvetkov MV, White T, Durkee S, Judge KW, Jannin V, Bellamine A, Weitschies W, Grimm M. The Effect of Capsule-in-Capsule Combinations on In Vivo Disintegration in Human Volunteers: A Combined Imaging and Salivary Tracer Study. Pharmaceutics 2021; 13:pharmaceutics13122002. [PMID: 34959284 PMCID: PMC8707024 DOI: 10.3390/pharmaceutics13122002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Revised: 11/12/2021] [Accepted: 11/23/2021] [Indexed: 12/05/2022] Open
Abstract
Controlling the time point and site of the release of active ingredients within the gastrointestinal tract after administration of oral delivery systems is still a challenge. In this study, the effect of the combination of small capsules (size 3) and large capsules (size 00) on the disintegration site and time was investigated using magnetic resonance imaging (MRI) in combination with a salivary tracer technique. As capsule shells, Vcaps® HPMC capsules, Vcaps® Plus HPMC capsules, gelatin and DRcaps® designed release capsules were used. The three HPMC-based capsules (Vcaps®, Vcaps® Plus and DRcaps® capsules) were tested as single capsules; furthermore, seven DUOCAP® capsule-in-capsule combinations were tested in a 10-way crossover open-label study in six healthy volunteers. The capsules contained iron oxide and hibiscus tea powder as tracers for visualization in MRI, and two different caffeine species (natural caffeine and 13C3) to follow caffeine release and absorption as measured by salivary levels. Results showed that the timing and location of disintegration in the gastrointestinal tract can be measured and differed when using different combinations of capsule shells. Increased variability among the six subjects was observed in most of the capsule combinations. The lowest variability in gastrointestinal localization of disintegration was observed for the DUOCAP® capsule-in-capsule configuration using a DRcaps® designed release capsule within a DRcaps® designed release outer capsule. In this combination, the inner DRcaps® designed release capsule always opened reliably after reaching the ileum. Thus, this combination enables targeted delivery to the distal small intestine. Among the single capsules tested, Vcaps® Plus HPMC capsules showed the fastest and most consistent disintegration.
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Affiliation(s)
- Adrian Rump
- Department of Biopharmaceutics and Pharmaceutical Technology, University of Greifswald, 17489 Greifswald, Germany; (A.R.); (F.N.W.); (L.S.); (W.W.)
| | - Franziska N. Weiss
- Department of Biopharmaceutics and Pharmaceutical Technology, University of Greifswald, 17489 Greifswald, Germany; (A.R.); (F.N.W.); (L.S.); (W.W.)
| | - Louisa Schulz
- Department of Biopharmaceutics and Pharmaceutical Technology, University of Greifswald, 17489 Greifswald, Germany; (A.R.); (F.N.W.); (L.S.); (W.W.)
| | - Marie-Luise Kromrey
- Department of Diagnostic Radiology and Neuroradiology, University Hospital Greifswald, 17475 Greifswald, Germany;
| | - Eberhard Scheuch
- Department of Clinical Pharmacology, University Hospital Greifswald, 17487 Greifswald, Germany; (E.S.); (M.V.T.)
| | - Mladen V. Tzvetkov
- Department of Clinical Pharmacology, University Hospital Greifswald, 17487 Greifswald, Germany; (E.S.); (M.V.T.)
| | - Tyler White
- Lonza Capsules & Health Ingredients, Morristown, NJ 07960, USA; (T.W.); (S.D.); (K.W.J.); (A.B.)
| | - Shane Durkee
- Lonza Capsules & Health Ingredients, Morristown, NJ 07960, USA; (T.W.); (S.D.); (K.W.J.); (A.B.)
| | - Kevin W. Judge
- Lonza Capsules & Health Ingredients, Morristown, NJ 07960, USA; (T.W.); (S.D.); (K.W.J.); (A.B.)
| | - Vincent Jannin
- Lonza Capsules & Health Ingredients, 68000 Colmar, France;
| | - Aouatef Bellamine
- Lonza Capsules & Health Ingredients, Morristown, NJ 07960, USA; (T.W.); (S.D.); (K.W.J.); (A.B.)
| | - Werner Weitschies
- Department of Biopharmaceutics and Pharmaceutical Technology, University of Greifswald, 17489 Greifswald, Germany; (A.R.); (F.N.W.); (L.S.); (W.W.)
| | - Michael Grimm
- Department of Biopharmaceutics and Pharmaceutical Technology, University of Greifswald, 17489 Greifswald, Germany; (A.R.); (F.N.W.); (L.S.); (W.W.)
- Correspondence: ; Tel.: +49-3834-4204816
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Kjeldsen RB, Kristensen MN, Gundlach C, Thamdrup LHE, Müllertz A, Rades T, Nielsen LH, Zór K, Boisen A. X-ray Imaging for Gastrointestinal Tracking of Microscale Oral Drug Delivery Devices. ACS Biomater Sci Eng 2021; 7:2538-2547. [PMID: 33856194 DOI: 10.1021/acsbiomaterials.1c00225] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Microscale devices are promising tools to overcome specific challenges within oral drug delivery. Despite the availability of advanced high-quality imaging techniques, visualization and tracking of microscale devices in the gastrointestinal (GI) tract is still a challenge. This work explores the possibilities of applying planar X-ray imaging and computed tomography (CT) scanning for visualization and tracking of microscale devices in the GI tract of rats. Microcontainers (MCs) are an example of microscale devices that have shown great potential as an oral drug delivery system. Barium sulfate (BaSO4) loaded into the cavity of the MCs increases their overall X-ray contrast, which allows them to be easily tracked. The BaSO4-loaded MCs are quantitatively tracked throughout the entire GI tract of rats by planar X-ray imaging and visualized in 3D by CT scanning. The majority of the BaSO4-loaded MCs are observed to retain in the stomach for 0.5-2 h, enter the cecum after 3-4 h, and leave the cecum and colon 8-10 h post-administration. The imaging approaches can be adopted and used with other types of microscale devices when investigating GI behavior in, for example, preclinical trials and potential clinical studies.
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Affiliation(s)
- Rolf Bech Kjeldsen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Maja Nørgaard Kristensen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Carsten Gundlach
- Department of Physics, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Lasse Højlund Eklund Thamdrup
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Anette Müllertz
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Thomas Rades
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark.,Department of Pharmacy, University of Copenhagen, 2100 Copenhagen, Denmark
| | - Line Hagner Nielsen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Kinga Zór
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
| | - Anja Boisen
- The Danish National Research Foundation and Villum Foundation's Center for Intelligent Drug Delivery and Sensing Using Microcontainers and Nanomechanics (IDUN), Department of Health Technology, Technical University of Denmark, 2800 Kongens Lyngby, Denmark
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4
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Das S, Kaur S, Rai VK. Gastro-retentive drug delivery systems: a recent update on clinical pertinence and drug delivery. Drug Deliv Transl Res 2021; 11:1849-1877. [PMID: 33403646 DOI: 10.1007/s13346-020-00875-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 10/29/2020] [Indexed: 01/20/2023]
Abstract
Gastro-retentive drug delivery systems are some of the best technologies delivered through oral route. These mainly came into picture for their effective local action in the GI region, specifically for the drugs with narrow absorption window. In the recent decades, several technologies have evolved showing different mechanisms for retaining the drug in GI region for longer duration with increased bioavailability. Floatable, mucoadhesive, swelable, magnetic, nanofibrous, high-density, and expandable systems have been investigated extensively as the potential gastro-retentive strategies. The advances in the technologies studied, their clinical pertinence, and methods of drug delivery are described in this review with their immense future utilities. Their entry into the pharmaceutical market is a huge matter to look into as most of the studied strategies are facing problems and hence are underrated to overcome the clinical trials. Their success in the clinical trials are enormously required for gaining their access into the pharmaceutical market. Selection of the right technology for the right purpose through the right mechanism of action is to be done for obtaining the system with desired activity.
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Affiliation(s)
- Supratim Das
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Sukhbir Kaur
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, Punjab, 142001, India
| | - Vineet Kumar Rai
- Department of Pharmaceutics, ISF College of Pharmacy, Moga, Punjab, 142001, India.
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5
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Takeshita K, Okazaki S, Shinada K, Shibamoto Y. Application of a Compact Magnetic Resonance Imaging System with 1.5 T Permanent Magnets to Visualize Release from and the Disintegration of Capsule Formulations in Vitro and in Vivo. Biol Pharm Bull 2017; 40:1268-1274. [PMID: 28769009 DOI: 10.1248/bpb.b17-00154] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Although magnetic resonance imaging (MRI) has potential in assessments of formulations, few studies have been conducted because of the size and expense of the instrument. In the present study, the processes of in vitro and in vivo release in a gelatin capsule formulation model were visualized using a compact MRI system with 1.5 T permanent magnets, which is more convenient than the superconducting MRI systems typically used for clinical and experimental purposes. A Gd-chelate of diethylenetriamine-N,N,N',N″,N″-pentaacetic acid, a contrast agent that markedly enhances proton signals via close contact with water, was incorporated into capsule formulations as a marker compound. In vitro experiments could clearly demonstrate the preparation-dependent differences in the release/disintegration of the formulations. In some preparations, the penetration of water into the formulation and generation of bubbles in the capsule were also observed prior to the disintegration of the formulation. When capsule formulations were orally administered to rats, the release of the marker into the stomach and its transit to the duodenum were visualized. These results strongly indicate that the compact MRI system is a powerful tool for pharmaceutical studies.
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Affiliation(s)
- Keizo Takeshita
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University.,DDS Research Institute, Sojo University
| | - Shoko Okazaki
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Kyosuke Shinada
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
| | - Yuma Shibamoto
- Laboratory of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Sojo University
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6
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Bassi da Silva J, Ferreira SBDS, de Freitas O, Bruschi ML. A critical review about methodologies for the analysis of mucoadhesive properties of drug delivery systems. Drug Dev Ind Pharm 2017; 43:1053-1070. [DOI: 10.1080/03639045.2017.1294600] [Citation(s) in RCA: 43] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Jéssica Bassi da Silva
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringá, Maringá, Paran´, Brazil
| | - Sabrina Barbosa de Souza Ferreira
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringá, Maringá, Paran´, Brazil
| | - Osvaldo de Freitas
- Department of Pharmaceutical Sciences, Ribeirão Preto School of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Marcos Luciano Bruschi
- Postgraduate Program in Pharmaceutical Sciences, Laboratory of Research and Development of Drug Delivery Systems, Department of Pharmacy, State University of Maringá, Maringá, Paran´, Brazil
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7
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Effect of polyester/PEG mixed micelles composition on preparation of multicompartment nanoparticles: Influence of crystallinity on morphology. Eur Polym J 2017. [DOI: 10.1016/j.eurpolymj.2016.12.028] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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8
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Simultaneous magnetic resonance imaging and pharmacokinetic analysis of intramuscular depots. J Control Release 2016; 227:1-12. [DOI: 10.1016/j.jconrel.2016.02.029] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 02/15/2016] [Accepted: 02/15/2016] [Indexed: 11/23/2022]
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9
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Malachowski K, Breger J, Kwag HR, Wang MO, Fisher JP, Selaru FM, Gracias DH. Stimuli-responsive theragrippers for chemomechanical controlled release. Angew Chem Int Ed Engl 2014; 53:8045-8049. [PMID: 24634136 PMCID: PMC4315180 DOI: 10.1002/anie.201311047] [Citation(s) in RCA: 124] [Impact Index Per Article: 12.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2013] [Indexed: 11/07/2022]
Abstract
We report on a therapeutic approach using thermo-responsive multi-fingered drug eluting devices. These therapeutic grippers referred to as theragrippers are shaped using photolithographic patterning and are composed of rigid poly(propylene fumarate) segments and stimuli-responsive poly(N-isopropylacrylamide-co-acrylic acid) hinges. They close above 32 °C allowing them to spontaneously grip onto tissue when introduced from a cold state into the body. Due to porosity in the grippers, theragrippers could also be loaded with fluorescent dyes and commercial drugs such as mesalamine and doxorubicin, which eluted from the grippers for up to seven days with first order release kinetics. In an in vitro model, theragrippers enhanced delivery of doxorubicin as compared to a control patch. We also released theragrippers into a live pig and visualized release of dye in the stomach. The design of such tissue gripping drug delivery devices offers an effective strategy for sustained release of drugs with immediate applicability in the gastrointestinal tract.
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Affiliation(s)
- Kate Malachowski
- Department of Chemical and Biomolecular Engineering The Johns Hopkins University 3400 N. Charles St., Baltimore, MD 21218 (USA)
| | - Joyce Breger
- Department of Chemical and Biomolecular Engineering The Johns Hopkins University 3400 N. Charles St., Baltimore, MD 21218 (USA)
| | - Hye Rin Kwag
- Department of Chemical and Biomolecular Engineering The Johns Hopkins University 3400 N. Charles St., Baltimore, MD 21218 (USA)
| | - Martha O. Wang
- Fischell Department of Bioengineering University of Maryland, College Park, MD 20742 (USA)
| | - John P. Fisher
- Fischell Department of Bioengineering University of Maryland, College Park, MD 20742 (USA)
| | - Florin M. Selaru
- Department of Medicine, The Johns Hopkins University, Baltimore, MD21218 (USA)
| | - David H. Gracias
- Department of Chemical and Biomolecular Engineering The Johns Hopkins University 3400 N. Charles St., Baltimore, MD 21218 (USA)
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10
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Malachowski K, Breger J, Kwag HR, Wang MO, Fisher JP, Selaru FM, Gracias DH. Stimuli-Responsive Theragrippers for Chemomechanical Controlled Release. Angew Chem Int Ed Engl 2014. [DOI: 10.1002/ange.201311047] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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11
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Krasia-Christoforou T, Georgiou TK. Polymeric theranostics: using polymer-based systems for simultaneous imaging and therapy. J Mater Chem B 2013; 1:3002-3025. [PMID: 32261003 DOI: 10.1039/c3tb20191k] [Citation(s) in RCA: 90] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Polymer-based nanomedicine is a large and fast growing field. Polymer-based systems have been extensively used as therapeutic carriers as well as bioimaging agents for example in tumour diagnosis. However, fewer polymeric systems have been able to combine both therapy and imaging in a new field that is called theranostics (theragnostics). This review aims to summarise the recent developments and trends on polymeric theranostics. Four different types of therapies/treatments are examined namely drug delivery, gene delivery, photodynamic therapy and hyperthermia treatment combined with different imaging moieties like magnetic resonance imaging agents, fluorescent agents and microbubbles for ultrasound imaging.
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Affiliation(s)
- Theodora Krasia-Christoforou
- Department of Mechanical and Manufacturing Engineering, University of Cyprus, P.O. Box 20537, 1678 Nicosia, Cyprus.
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12
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Koptyug IV. MRI of mass transport in porous media: drying and sorption processes. PROGRESS IN NUCLEAR MAGNETIC RESONANCE SPECTROSCOPY 2012; 65:1-65. [PMID: 22781314 DOI: 10.1016/j.pnmrs.2011.12.001] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2011] [Accepted: 12/05/2011] [Indexed: 06/01/2023]
Affiliation(s)
- Igor V Koptyug
- International Tomography Center, SB RAS, 3A Institutskaya Str., Novosibirsk 630090, Russian Federation.
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13
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Son YJ, Yoo HS. pH-responsive microspheres encapsulated with iron oxide nanoaggregates for gastrointestinal delivery. J BIOACT COMPAT POL 2012. [DOI: 10.1177/0883911511430537] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Block copolymer-stabilized iron oxide nanoaggregates were fabricated into pH-responsive polymeric microspheres for intestinal delivery of the magnetic nanoaggregates. A diblock copolymer consisted of methoxy poly(ethylene glycol) (mPEG) and poly(e-caprolactone) (PCL) was synthesized by ring-opening polymerization. Microspheres, consisted of Eudragit L100-55 encapsulate and stabilized magnetic nanoaggregates, were prepared by an oil-in-oil emulsification technique. The magnetization of the microspheres decreased, and the stability of the magnetic nanoaggregates in aqueous solutions increased as the amount of block copolymers in the microspheres increased. The encapsulated magnetic nanoaggregates were visualized by scanning electron microscopy and energy-dispersive X-ray spectroscopy. The encapsulation efficiency of nanoaggregates of the microspheres increased as the amount of diblock copolymer in the nanoaggregates was increased. The in vitro experiments confirmed the pH-dependent release of the nanoaggregates from the microspheres. The microspheres were administered to the animals by oral gavages, and the nanoaggregates in small intestines were visualized by histological examination of intestinal inner walls. Higher amounts of the block copolymer in the nanoaggregates increased the uptake efficiency in the intestinal tissues. Thus, the incorporation of the block copolymers in the magnetic nanoaggregates increased the intestinal absorption of the aggregates and Eudragit microspheres and effectively protected the nanoaggregates at low pH conditions of the stomach area.
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Affiliation(s)
- Young Ju Son
- Department of Biomaterials Engineering, School of Bioscience and Bioengineering, Kangwon National University, Chuncheon, 200-701, Republic of Korea
| | - Hyuk Sang Yoo
- Department of Biomaterials Engineering, School of Bioscience and Bioengineering, Kangwon National University, Chuncheon, 200-701, Republic of Korea
- Institute of Bioscience and Bioengineering, Kangwon National University, Chuncheon, 200-701, Republic of Korea
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14
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Duodenum-specific drug delivery: In vivo assessment of a pharmaceutically developed enteric-coated capsule for a broad applicability in rat studies. Int J Pharm 2012; 422:338-40. [DOI: 10.1016/j.ijpharm.2011.10.017] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2011] [Revised: 10/04/2011] [Accepted: 10/06/2011] [Indexed: 01/25/2023]
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15
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Shaikh R, Raj Singh TR, Garland MJ, Woolfson AD, Donnelly RF. Mucoadhesive drug delivery systems. J Pharm Bioallied Sci 2011; 3:89-100. [PMID: 21430958 PMCID: PMC3053525 DOI: 10.4103/0975-7406.76478] [Citation(s) in RCA: 312] [Impact Index Per Article: 24.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2010] [Revised: 09/08/2010] [Accepted: 10/13/2010] [Indexed: 11/04/2022] Open
Abstract
Mucoadhesion is commonly defined as the adhesion between two materials, at least one of which is a mucosal surface. Over the past few decades, mucosal drug delivery has received a great deal of attention. Mucoadhesive dosage forms may be designed to enable prolonged retention at the site of application, providing a controlled rate of drug release for improved therapeutic outcome. Application of dosage forms to mucosal surfaces may be of benefit to drug molecules not amenable to the oral route, such as those that undergo acid degradation or extensive first-pass metabolism. The mucoadhesive ability of a dosage form is dependent upon a variety of factors, including the nature of the mucosal tissue and the physicochemical properties of the polymeric formulation. This review article aims to provide an overview of the various aspects of mucoadhesion, mucoadhesive materials, factors affecting mucoadhesion, evaluating methods, and finally various mucoadhesive drug delivery systems (buccal, nasal, ocular, gastro, vaginal, and rectal).
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Affiliation(s)
- Rahamatullah Shaikh
- Drug Delivery Group, School of Pharmacy, Queen's University Belfast, Medical Biology Centre, 97 Lisburn Road, Belfast, BT9 7BL, UK
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das Neves J, Bahia MF, Amiji MM, Sarmento B. Mucoadhesive nanomedicines: characterization and modulation of mucoadhesion at the nanoscale. Expert Opin Drug Deliv 2011; 8:1085-104. [DOI: 10.1517/17425247.2011.586334] [Citation(s) in RCA: 111] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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17
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Is It Possible to Anesthetize Palatal Tissues With Buccal 4% Articaine Injection? J Oral Maxillofac Surg 2010; 68:1032-7. [DOI: 10.1016/j.joms.2009.12.023] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2009] [Revised: 09/25/2009] [Accepted: 12/29/2009] [Indexed: 11/19/2022]
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18
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Saphier S, Rosner A, Brandeis R, Karton Y. Gastro intestinal tracking and gastric emptying of solid dosage forms in rats using X-ray imaging. Int J Pharm 2010; 388:190-5. [PMID: 20079410 DOI: 10.1016/j.ijpharm.2010.01.001] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2009] [Revised: 12/28/2009] [Accepted: 01/06/2010] [Indexed: 01/28/2023]
Abstract
The aim of this research was to study the gastrointestinal transit and gastric emptying of non-disintegrating solid dosage forms in rats using X-ray imaging. Commercial gelatin minicapsules were filled with barium sulfate and enterically coated using Eudragit S100. The capsules were administered orally to rats followed by a solution of iodine based contrast agent iopromide. Images were obtained using a standard X-ray camera and digital film processing. Capsules were followed through the GI tract from the stomach to the small intestine, cecum and large intestine and the capsule location could be easily identified. Gastric emptying of different sized capsules was studied. The effect of fasting and time of administration on gastric retention was also studied. It was found that shortened capsules of 3.5 and 4.8mm length were emptied from the stomach whereas the commercial length 7.18mm capsules were retained. Surprisingly, 2.5h post administration more rats retained the capsules in the stomach in the fasted state than in the fed state. We found that X-ray imaging can be used for simple visualization and localization of solid dosage forms in rats in the fed state using shortened commercial minicapsules on rats.
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Affiliation(s)
- Sigal Saphier
- The Department of Organic Chemistry, Israel Institute for Biological Research, Ness-Ziona, Israel.
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Benchtop-NMR and MRI—A new analytical tool in drug delivery research. Int J Pharm 2008; 364:170-5. [DOI: 10.1016/j.ijpharm.2008.09.033] [Citation(s) in RCA: 68] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2008] [Revised: 09/15/2008] [Accepted: 09/17/2008] [Indexed: 11/22/2022]
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