51
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Palem CR, Gannu R, Doodipala N, Yamsani VV, Yamsani MR. Transmucosal delivery of domperidone from bilayered buccal patches: In Vitro, Ex Vivo and In Vivo characterization. Arch Pharm Res 2011; 34:1701-10. [DOI: 10.1007/s12272-011-1014-2] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2011] [Revised: 06/29/2011] [Accepted: 07/05/2011] [Indexed: 11/29/2022]
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52
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Kamel R, Mahmoud A, El-Feky G. Double-phase hydrogel for buccal delivery of tramadol. Drug Dev Ind Pharm 2011; 38:468-83. [DOI: 10.3109/03639045.2011.611807] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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53
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Fini A, Bergamante V, Ceschel GC. Mucoadhesive gels designed for the controlled release of chlorhexidine in the oral cavity. Pharmaceutics 2011; 3:665-79. [PMID: 24309302 PMCID: PMC3857052 DOI: 10.3390/pharmaceutics3040665] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2011] [Revised: 09/09/2011] [Accepted: 09/26/2011] [Indexed: 11/23/2022] Open
Abstract
This study describes the in vitro/ex vivo buccal release of chlorhexidine (CHX) from nine mucoadhesive aqueous gels, as well as their physicochemical and mucoadhesive properties: CHX was present at a constant 1% w/v concentration in the chemical form of digluconate salt. The mucoadhesive/gel forming materials were carboxymethyl- (CMC), hydroxypropylmethyl- (HPMC) and hydroxypropyl- (HPC) cellulose, alone (3% w/w) or in binary mixtures (5% w/w); gels were tested for their mucoadhesion using the mucin method at 1, 2 and 3% w/w concentrations. CHX release from different formulations was assessed using a USP method and newly developed apparatus, combining release/permeation process in which porcine mucosa was placed in a Franz cell. The combination of HPMC or HPC with CMC showed slower drug release when compared to each of the individual polymers. All the systems proved suitable for CHX buccal delivery, being able to guarantee both prolonged release and reduced transmucosal permeation. Gels were compared for the release of previously studied tablets that contained Carbopol and HPMC, alone or in mixture. An accurate selection and combination of the materials allow the design of different pharmaceutical forms suitable for different purposes, by simply modifying the formulation compositions.
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Affiliation(s)
- Adamo Fini
- Department SMETEC, University of Bologna, Bologna, 40127, Italy; E-Mail:
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +39-051-2095655; Fax: +39-051-2095652
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54
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Varoni EM, Molteni A, Sardella A, Carrassi A, Di Candia D, Gigli F, Lodi F, Lodi G. Pharmacokinetics study about topical clobetasol on oral mucosa. J Oral Pathol Med 2011; 41:255-60. [DOI: 10.1111/j.1600-0714.2011.01087.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
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55
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Palatal mucosa as a route for systemic drug delivery: A review. J Control Release 2011; 151:2-9. [DOI: 10.1016/j.jconrel.2010.11.003] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2010] [Accepted: 10/19/2010] [Indexed: 11/22/2022]
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56
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Abu-Huwaij R, Obaidat RM, Sweidan K, Al-Hiari Y. Formulation and in vitro evaluation of xanthan gum or carbopol 934-based mucoadhesive patches, loaded with nicotine. AAPS PharmSciTech 2011; 12:21-7. [PMID: 21161460 PMCID: PMC3066338 DOI: 10.1208/s12249-010-9534-5] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2009] [Accepted: 10/22/2010] [Indexed: 11/30/2022] Open
Abstract
Bilayer nicotine mucoadhesive patches were prepared and evaluated to determine the feasibility of the formulation as a nicotine replacement product to aid in smoking cessation. Nicotine patches were prepared using xanthan gum or carbopol 934 as a mucoadhesive polymers and ethyl cellulose as a backing layer. The patches were evaluated for their thickness, weight and content uniformity, swelling behavior, drug-polymers interaction, adhesive properties, and drug release. The physicochemical interactions between nicotine and the polymers were investigated by Fourier transform infrared (FTIR) spectroscopy. Mucoadhesion was assessed using two-arm balance method, and the in vitro release was studied using the Franz cell. FTIR revealed that there was an acid base interaction between nicotine and carbopol as well as nicotine and xanthan. Interestingly, the mucoadhesion and in vitro release studies indicated that this interaction was strong between the drug and carbopol whereas it was weak between the drug and xanthan. Loading nicotine concentration to non-medicated patches showed a significant decrease in the mucoadhesion strength of carbopol patches and no significant effect on the mucoadhesion strength of xanthan patches. In vitro release studies of the xanthan patches showed a reasonable fast initial release profile followed by controlled drug release over a 10-h period.
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Affiliation(s)
| | - Rana M. Obaidat
- />Jordan University of Science and Technology, Irbid, Jordan
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57
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Hoffmann EM, Breitenbach A, Breitkreutz J. Advances in orodispersible films for drug delivery. Expert Opin Drug Deliv 2011; 8:299-316. [DOI: 10.1517/17425247.2011.553217] [Citation(s) in RCA: 224] [Impact Index Per Article: 17.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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58
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Movassaghian S, Barzegar-Jalali M, Alaeddini M, Hamedyazdan S, Afzalifar R, Zakeri-Milani P, Mohammadi G, Adibkia K. Development of amitriptyline buccoadhesive tablets for management of pain in dental procedures. Drug Dev Ind Pharm 2011; 37:849-54. [DOI: 10.3109/03639045.2010.546403] [Citation(s) in RCA: 13] [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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59
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Yu M, Vajdy M. Mucosal HIV transmission and vaccination strategies through oral compared with vaginal and rectal routes. Expert Opin Biol Ther 2010; 10:1181-95. [PMID: 20624114 DOI: 10.1517/14712598.2010.496776] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
IMPORTANCE OF THE FIELD There are currently over thirty million people infected with HIV and there are no vaccines available to prevent HIV infections or disease. The genitourinary, rectal and oral mucosa are the mucosal HIV transmission routes. An effective vaccine that can induce both systemic and local mucosal immunity is generally accepted as a major means of protection against mucosal HIV transmission and AIDS. WHAT THE READER WILL GAIN Structure and cells that comprise the oral, vaginal and rectal mucosa pertaining to HIV transmission and vaccination strategies through each mucosal route to prevent mucosal and systemic infection will be discussed. AREAS COVERED IN THIS REVIEW Covering publications from 1980s through 2010, mucosal transmission of HIV and current and previous approaches to vaccinations are discussed. TAKE HOME MESSAGE Although oral transmission of HIV is far less common than vaginal and rectal transmissions, infections through this route do occur through oral sex as well as vertically from mother to child. Mucosal vaccination strategies against oral and other mucosal HIV transmissions are under intensive research but the lack of consensus on immune correlates of protection and lack of safe and effective mucosal adjuvants and delivery systems hamper progress towards a licensed vaccine.
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Affiliation(s)
- Mingke Yu
- EpitoGenesis, Inc., Walnut Creek, CA 94598, USA
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60
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Adhikari SNR, Nayak BS, Nayak AK, Mohanty B. Formulation and evaluation of buccal patches for delivery of atenolol. AAPS PharmSciTech 2010; 11:1038-44. [PMID: 20533098 DOI: 10.1208/s12249-010-9459-z] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2009] [Accepted: 05/14/2010] [Indexed: 11/30/2022] Open
Abstract
Buccal patches for the delivery of atenolol using sodium alginate with various hydrophilic polymers like carbopol 934 P, sodium carboxymethyl cellulose, and hydroxypropyl methylcellulose in various proportions and combinations were fabricated by solvent casting technique. Various physicomechanical parameters like weight variation, thickness, folding endurance, drug content, moisture content, moisture absorption, and various ex vivo mucoadhesion parameters like mucoadhesive strength, force of adhesion, and bond strength were evaluated. An in vitro drug release study was designed, and it was carried out using commercial semipermeable membrane. All these fabricated patches were sustained for 24 h and obeyed first-order release kinetics. Ex vivo drug permeation study was also performed using porcine buccal mucosa, and various drug permeation parameters like flux and lag time were determined.
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61
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Gajdziok J, Bajerová M, Chalupová Z, Rabišková M. Oxycellulose as mucoadhesive polymer in buccal tablets. Drug Dev Ind Pharm 2010; 36:1115-30. [DOI: 10.3109/03639041003690031] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Jan Gajdziok
- Department of Pharmaceutics, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
| | - Martina Bajerová
- Department of Pharmaceutics, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
| | - Zuzana Chalupová
- Department of Pharmaceutics, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
| | - Miloslava Rabišková
- Department of Pharmaceutics, Faculty of Pharmacy, University of Veterinary and Pharmaceutical Sciences, Brno, Czech Republic
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62
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Smistad G, Nguyen NB, Hegna IK, Sande SA. Influence of liposomal formulation variables on the interaction withCandida albicansin biofilm; a multivariate approach. J Liposome Res 2010; 21:9-16. [PMID: 20196625 DOI: 10.3109/08982101003629009] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Affiliation(s)
- Gro Smistad
- Department of Pharmacy, School of Pharmacy, University of Oslo, Oslo, Norway.
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63
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Improving sublingual delivery of weak base compounds using pHmax concept: Application to propranolol. Eur J Pharm Sci 2010; 39:272-8. [DOI: 10.1016/j.ejps.2009.12.011] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2009] [Revised: 10/23/2009] [Accepted: 12/23/2009] [Indexed: 11/23/2022]
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64
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Hassan N, Ahad A, Ali M, Ali J. Chemical permeation enhancers for transbuccal drug delivery. Expert Opin Drug Deliv 2009; 7:97-112. [DOI: 10.1517/17425240903338758] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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65
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Madhav NS, Shakya AK, Shakya P, Singh K. Orotransmucosal drug delivery systems: A review. J Control Release 2009; 140:2-11. [DOI: 10.1016/j.jconrel.2009.07.016] [Citation(s) in RCA: 152] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2009] [Accepted: 07/27/2009] [Indexed: 11/28/2022]
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Abstract
Opioids are the mainstay of treatment for moderate to severe cancer pain. In recent years there have been many advances in the use of opioids for cancer pain. Availability and consumption of opioids have increased and opioids other than morphine (including methadone, fentanyl, oxycodone) have become more widely used. Inter-individual variation in response to opioids has been identified as a significant challenge in the management of cancer pain. Many studies have been published demonstrating the benefits of opioid switching as a clinical maneuver to improve tolerability. Constipation has been recognized as a significant burden in cancer patients on opioids. Peripherally restricted opioid antagonists have been developed for the prevention and management of opioid induced constipation. The phenomenon of breakthrough pain has been characterized and novel modes of opioid administration (transmucosal, intranasal, sublingual) have been explored to facilitate improved management of breakthrough cancer pain. Advances have also been made in the realm of molecular biology. Pharmacogenetic studies have explored associations between clinical response to opioids and genetic variation at a DNA level. To date these studies have been small but future research may facilitate prospective prediction of response to individual drugs.
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Affiliation(s)
- Joanne Droney
- Palliative Medicine Department, Royal Marsden Hospital, London, UK
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67
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Jug M, Bećirević-Laćan M, Bengez S. Novel cyclodextrin-based film formulation intended for buccal delivery of atenolol. Drug Dev Ind Pharm 2009; 35:796-807. [DOI: 10.1080/03639040802596212] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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68
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van de Ven AL, Adler-Storthz K, Richards-Kortum R. Delivery of optical contrast agents using Triton-X100, part 2: enhanced mucosal permeation for the detection of cancer biomarkers. JOURNAL OF BIOMEDICAL OPTICS 2009; 14:021013. [PMID: 19405726 PMCID: PMC2746827 DOI: 10.1117/1.3090437] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Uniform delivery of optical contrast agents through mucosal tissue has proven a significant challenge. Topical permeation enhancers that have proven useful for skin demonstrate limited success in mucosal tissue. We sought to develop a topical permeation strategy capable of delivering tissue-impermeant molecular-specific contrast agents through mucosal epithelium in a uniform, controlled manner. We demonstrate that Triton-X100 can be utilized to deliver targeted and untargeted optical contrast agents through freshly excised normal mucosal epithelium and epithelial cancer. Macromolecules up to 150 kDa in size were successfully delivered via transcellular and paracellular routes. The depth of Triton-mediated permeation was modulated by varying the treatment time and concentration. Uniform epithelial penetration to a depth of 500 mum was achieved in approximately 1.5 h for molecules of 40 kDa or less. Larger optical probes required longer treatment times. Coadministration of molecular-specific contrast agents with Triton-X100 treatment facilitated simultaneous labeling of biomarkers on the cell membrane, in the cytoplasm, and in the nucleus with high specificity. Together, these data suggest that Triton-X100 is a promising topical permeation enhancer for mucosal delivery of tissue-impermeant molecular-specific optical contrast agents.
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Affiliation(s)
- Anne L van de Ven
- Rice University, Department of Bioengineering, MS 142, 6100 Main Street, Keck Hall, Suite 116, Houston, TX 77005, Phone: 713-348-3022, Fax: 713-348-5877,
| | - Karen Adler-Storthz
- Department of Diagnostic Sciences, University of Texas Dental Branch, 6516 M.D. Anderson Blvd, DBB, 4.133, Houston, TX 77030, Phone: 713-500-4362, Fax: 713-500-4373,
| | - Rebecca Richards-Kortum
- Rice University, Department of Bioengineering, MS 142, 6100 Main Street, Keck Hall, Suite 116, Houston, TX 77005, Phone: 713-348-3823, Fax: 713-348-5877,
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69
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De Caro V, Giandalia G, Siragusa MG, Paderni C, Campisi G, Giannola LI. Evaluation of galantamine transbuccal absorption by reconstituted human oral epithelium and porcine tissue as buccal mucosa models: Part I. Eur J Pharm Biopharm 2008; 70:869-73. [DOI: 10.1016/j.ejpb.2008.06.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2008] [Revised: 06/18/2008] [Accepted: 06/23/2008] [Indexed: 10/21/2022]
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70
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Gardiner J, Freeman S, Leach M, Green A, Alcock J, D'Emanuele A. PAMAM dendrimers for the delivery of the antibacterial Triclosan. J Enzyme Inhib Med Chem 2008; 23:623-8. [DOI: 10.1080/14756360802205257] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022] Open
Affiliation(s)
- Jonathan Gardiner
- School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Sally Freeman
- School of Pharmacy and Pharmaceutical Sciences, University of Manchester, Oxford Road, Manchester M13 9PT, UK
| | - Matthew Leach
- Unilever Research & Development, Port Sunlight, Wirral, Merseyside CH63 3JW, UK
| | - Alison Green
- Unilever Research & Development, Port Sunlight, Wirral, Merseyside CH63 3JW, UK
| | - Jacqui Alcock
- Unilever Research & Development, Port Sunlight, Wirral, Merseyside CH63 3JW, UK
| | - Antony D'Emanuele
- School of Pharmacy and Pharmaceutical Sciences, University of Central Lancashire, Preston PR1 2HE, UK
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71
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Pignatello R, Stancampiano AHS, Ventura CA, Puglisi G. Dexamethasone sodium phosphate-loaded Chitosan based delivery systems for buccal application. J Drug Target 2008; 15:603-10. [DOI: 10.1080/10611860701502806] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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72
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Abu-Huwaij R, Assaf S, Salem M, Sallam A. Potential Mucoadhesive Dosage Form of Lidocaine Hydrochloride: II. In Vitro and In Vivo Evaluation. Drug Dev Ind Pharm 2008; 33:437-48. [PMID: 17523008 DOI: 10.1080/03639040601150211] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
The aim of this study was to develop a controlled release buccal mucoadhesive delivery system for systemic delivery of lidocaine hydrochloride as a model drug. In vitro release and buccal permeation as well as in vivo permeation of LDHCL patches were evaluated. The drug release and the permeability of the drug through porcine buccal mucosa were evaluated using Franz diffusion cell. In vivo evaluation of patches was carried out on rabbits as an animal model. Patches were designed in two fashions, bi-layer (BLP; LDHCL, carbopol, glycerin, pentration enhancer, and Tween 20 as the first layer; and EVA as the second layer) and triple layer (TLP; LDHCL, carbopol and glycerin as the first layer; carbopol, glycerin, pentration enhancer and pluronic F-127 as the middle layer; and EVA as the third layer) patches, respectively. Presence of oleic acid as PE in the formulation significantly enhanced the in vitro permeability of LDHCL (p<0.05), while propylene glycol monolaurate as PE suppressed it (p<0.05). The in vivo evaluation in rabbits showed that TLP had significantly higher Cmax and AUC0-8 (p<0.05) than BLP. Furthermore, TLP showed a well-controlled drug plasma concentration over 6 hr which was significantly longer than BLP (p<0.05). Patches were well adhered to buccal mucosa of the rabbits over the 8-hr study period. It was postulated that the hypothetical release mechanism of the drug and oleic acid from TLP was controlled by their diffusion through the swollen polymer network and micelled gel.
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Affiliation(s)
- Rana Abu-Huwaij
- Department of Pharmaceutics, College of Pharmacy and Medical Sciences, Al-Ahliyya Amman University, Amman, Jordan.
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73
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Bruschi ML, de Freitas O, Lara EHGE, Panzeri H, Gremião MPD, Jones DS. Precursor System of Liquid Crystalline Phase Containing Propolis Microparticles for the Treatment of Periodontal Disease: Development and Characterization. Drug Dev Ind Pharm 2008; 34:267-78. [DOI: 10.1080/03639040701655911] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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74
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Shidhaye SS, Saindane NS, Sutar S, Kadam V. Mucoadhesive bilayered patches for administration of sumatriptan succinate. AAPS PharmSciTech 2008; 9:909-16. [PMID: 18679806 DOI: 10.1208/s12249-008-9125-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2008] [Accepted: 06/26/2008] [Indexed: 11/30/2022] Open
Abstract
The purpose of this study was to develop and optimize formulations of mucoadhesive bilayered buccal patches of sumatriptan succinate using chitosan as the base matrix. The patches were prepared by the solvent casting method. Gelatin and polyvinyl pyrrolidone (PVP) K30 were incorporated into the patches, to improve the film properties of the patches. The patches were found to be smooth in appearance, uniform in thickness, weight, and drug content; showed good mucoadhesive strength; and good folding endurance. A 3(2) full factorial design was employed to study the effect of independent variables viz. levels of chitosan and PVP K30, which significantly influenced characteristics like swelling index, in-vitro mucoadhesive strength, in vitro drug release, and in-vitro residence time. Different penetration enhancers were tried to improve the permeation of sumatriptan succinate through buccal mucosa. Formulation containing 3% dimethyl sulfoxide showed good permeation of sumatriptan succinate through mucosa. Histopathological studies revealed no buccal mucosal damage. It can be concluded that buccal route can be one of the alternatives available for administration of sumatriptan succinate.
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75
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Scholz OA, Wolff A, Schumacher A, Giannola LI, Campisi G, Ciach T, Velten T. Drug delivery from the oral cavity: focus on a novel mechatronic delivery device. Drug Discov Today 2007; 13:247-53. [PMID: 18342801 DOI: 10.1016/j.drudis.2007.10.018] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2007] [Revised: 10/21/2007] [Accepted: 10/22/2007] [Indexed: 10/22/2022]
Abstract
Dental drug delivery systems have been used for a long time, in particular for the local therapy of diseases affecting the oral cavity. Research today concentrates on the design of formulations to increase their retention time. Even today, however, prosthetic devices incorporating drug delivery are rarely used. Mainly, they are focused on prophylaxis and the release of antibacterial agents. However, as buccal delivery, because of its undeniable advantages, has become popular for systemic drug delivery, and prolonged well-controlled release has been identified as beneficial, especially for chronic diseases, a new class of delivery systems is evolving: highly miniaturized computerized delivery systems, integrated into a dental appliance. Dental delivery systems today are used in two ways: the main application is the local treatment of diseases affecting the oral cavity itself like periodontitis or fungal infections. The second is for systemic drug delivery.
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Affiliation(s)
- Oliver A Scholz
- Fraunhofer-Institut Biomedizinische Technik, St. Ingbert, Germany.
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76
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Giannola LI, De Caro V, Giandalia G, Siragusa MG, Tripodo C, Florena AM, Campisi G. Release of naltrexone on buccal mucosa: Permeation studies, histological aspects and matrix system design. Eur J Pharm Biopharm 2007; 67:425-33. [PMID: 17451927 DOI: 10.1016/j.ejpb.2007.02.020] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2006] [Revised: 02/14/2007] [Accepted: 02/26/2007] [Indexed: 11/30/2022]
Abstract
Transbuccal drug delivery has got several well-known advantages especially with respect to peroral way. Since a major limitation in buccal drug delivery could be the low permeability of the epithelium, the aptitude of NLX to penetrate the mucosal barrier was assessed. Ex vivo permeation across porcine buccal mucosa 800 microm thick was investigated using Franz type diffusion cells and compared with in vitro data previously obtained by reconstituted human oral epithelium 100 microm thick. Both fluxes (Js) and permeability coefficients (K(p)) are in accordance, using either buffer solution simulating saliva or natural human saliva. Permeation was evaluated also in presence of chemical enhancers or iontophoresis. No significant differences in penetration rate were observed using chemical enhancers; in contrast, Js and K(p) were extensively affected by application of electric fields. Tablets, designed for Naltrexone hydrochloride (NLX) administration on buccal mucosa, were developed and prepared by direct compression of drug loaded (56%) poly-octylcyanocrylate (poly-OCA) matrices. NLX is slowly discharged from buccal tablets following Higuchian kinetic. Histologically, no signs of flogosis ascribable to NLX and/or poly-OCA were observed, while cytoarchitectural changes due to iontophoresis were detected. Buccal tablets containing NLX may represent a potential alternative dosage form in addiction management.
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Affiliation(s)
- Libero Italo Giannola
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Palermo, Italy.
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77
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Smistad G, Jacobsen J, Sande SA. Multivariate toxicity screening of liposomal formulations on a human buccal cell line. Int J Pharm 2006; 330:14-22. [PMID: 16997516 DOI: 10.1016/j.ijpharm.2006.08.044] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2006] [Revised: 08/18/2006] [Accepted: 08/25/2006] [Indexed: 11/23/2022]
Abstract
The influence of various formulation factors on the in vitro cellular toxicity of liposomes on human buccal cells (TR146), were studied by using the concept of statistical experimental design and multivariate evaluation. The factors investigated were the type of main phospholipid (egg-PC, DMPC, DPPC), lipid concentration, the type of charge, liposome size, and amount and nature of the charged component (diacyl-PA, diacyl-PG, diacyl-PS, stearylamine (SA), diacyl-TAP) in the liposomes. Both full factorial design and D-optimal designs were created. Several significant main factors and interactions were revealed. Positively charged liposomes were shown to be toxic. The toxicity of negatively charged liposomes was relatively low. Diacyl-TAP was less toxic than SA, and DPPC was less toxic than DMPC. Low level of positively charged component was favourable and essential when using egg-PC as the main lipid. The amount of negatively charged component, the liposome size, and the total lipid concentration did not affect the toxicity within the experimental room. DPPC appeared to be a good candidate when formulating both positively and negatively charged liposomes with low cellular toxicity. The concept of statistical experimental design and multivariate evaluation was shown to be a useful approach in cell toxicity screening studies.
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Affiliation(s)
- Gro Smistad
- University of Oslo, School of Pharmacy, Department of Pharmaceutics, Oslo, Norway.
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Giannola LI, De Caro V, Giandalia G, Siragusa MG, Campisi G, Florena AM, Ciach T. Diffusion of naltrexone across reconstituted human oral epithelium and histomorphological features. Eur J Pharm Biopharm 2006; 65:238-46. [PMID: 16962298 DOI: 10.1016/j.ejpb.2006.07.004] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2006] [Revised: 07/05/2006] [Accepted: 07/07/2006] [Indexed: 10/24/2022]
Abstract
In transbuccal absorption a major limitation could be the low permeability of the mucosa which implies low drug bioavailability. The ability of naltrexone hydrochloride (NLX) to penetrate a resembling histologically human buccal mucosa was assessed and the occurrence of any histomorphological changes observed. We used reconstituted human oral (RHO) non-keratinised epithelium as mucosal section and a Transwell diffusion cells system as bicompartmental model. Buccal permeation was expressed in terms of drug flux (J(s)) and permeability coefficients (K(p)). Data were collected using both artificial and natural human saliva. The main finding was that RHO does not restrain NLX permeation. Drug transport across the epithelium was observed also in presence of various concentrations of penetration enhancers, without any significant differences. On the contrary, the flux throughout the mucosa was extensively affected by iontophoresis. Histologically, no sign of flogosis was observed in any specimen under experiment without iontophoresis, whereas cytoarchitectural changes, up to nuclear pycnosis or cellular swelling, were determined as a consequence of the application of electric fields.
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Affiliation(s)
- Libero Italo Giannola
- Dipartimento di Chimica e Tecnologie Farmaceutiche, Università di Palermo, Via Archirafi 32, 90123 Palermo, Italy.
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79
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Sudhakar Y, Kuotsu K, Bandyopadhyay AK. Buccal bioadhesive drug delivery--a promising option for orally less efficient drugs. J Control Release 2006; 114:15-40. [PMID: 16828915 DOI: 10.1016/j.jconrel.2006.04.012] [Citation(s) in RCA: 397] [Impact Index Per Article: 22.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/04/2005] [Accepted: 04/26/2006] [Indexed: 10/24/2022]
Abstract
Rapid developments in the field of molecular biology and gene technology resulted in generation of many macromolecular drugs including peptides, proteins, polysaccharides and nucleic acids in great number possessing superior pharmacological efficacy with site specificity and devoid of untoward and toxic effects. However, the main impediment for the oral delivery of these drugs as potential therapeutic agents is their extensive presystemic metabolism, instability in acidic environment resulting into inadequate and erratic oral absorption. Parenteral route of administration is the only established route that overcomes all these drawbacks associated with these orally less/inefficient drugs. But, these formulations are costly, have least patient compliance, require repeated administration, in addition to the other hazardous effects associated with this route. Over the last few decades' pharmaceutical scientists throughout the world are trying to explore transdermal and transmucosal routes as an alternative to injections. Among the various transmucosal sites available, mucosa of the buccal cavity was found to be the most convenient and easily accessible site for the delivery of therapeutic agents for both local and systemic delivery as retentive dosage forms, because it has expanse of smooth muscle which is relatively immobile, abundant vascularization, rapid recovery time after exposure to stress and the near absence of langerhans cells. Direct access to the systemic circulation through the internal jugular vein bypasses drugs from the hepatic first pass metabolism leading to high bioavailability. Further, these dosage forms are self-administrable, cheap and have superior patient compliance. Developing a dosage form with the optimum pharmacokinetics is a promising area for continued research as it is enormously important and intellectually challenging. With the right dosage form design, local environment of the mucosa can be controlled and manipulated in order to optimize the rate of drug dissolution and permeation. A rational approach to dosage form design requires a complete understanding of the physicochemical and biopharmaceutical properties of the drug and excipients. Advances in experimental and computational methodologies will be helpful in shortening the processing time from formulation design to clinical use. This paper aims to review the developments in the buccal adhesive drug delivery systems to provide basic principles to the young scientists, which will be useful to circumvent the difficulties associated with the formulation design.
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Affiliation(s)
- Yajaman Sudhakar
- Buccal Adhesive Research Laboratory, Division of Pharmaceutics, Department of Pharmaceutical Technology, Jadavpur University, Kolkata 700032, India.
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80
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El-Samaligy MS, Afifi NN, Mahmoud EA. Increasing bioavailability of silymarin using a buccal liposomal delivery system: preparation and experimental design investigation. Int J Pharm 2005; 308:140-8. [PMID: 16356669 DOI: 10.1016/j.ijpharm.2005.11.006] [Citation(s) in RCA: 154] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/26/2005] [Revised: 10/24/2005] [Accepted: 11/05/2005] [Indexed: 11/22/2022]
Abstract
Silymarin is a natural lipotropic agent of low bioavailability from oral products. The aim of our study is to prepare buccal liposomal delivery system of silymarin with higher bioavailability. The effect of lecithin:cholesterol molar ratio on the percentage drug encapsulated was investigated. The influence of fluctuating the amount of added drug was also determined. The effect of additives such as positive charge inducer, negative charge inducer and surfactants was studied using two different 2(3) full factorial designs. Furthermore, additives used to optimize liposomal product were also investigated for their optimal concentrations, release properties and in vitro permeation and absorption through chicken cheek pouch. Optimal liposomal encapsulation efficiency was found at 7:4 lecithin to cholesterol molar ratio. A decrease in entrapment efficiency with increasing cholesterol content was observed. Tween 20 or Tween 80 beyond 0.5 molar ratio decreased the entrapment efficiency. Positively charged liposomes showed superior entrapment efficiency over neutral and negatively charged liposomes. Release studies as well as permeation and absorption studies showed that hybrid liposomes prepared according to formula 3 containing lecithin, cholesterol, stearyl amine and Tween 20 in 9:1:1:0.5 molar ratio, respectively, gave the best drug absorption and permeation. It showed steady state permeation through chicken cheek pouch for 6h. This is expected to improve the bioavailability of silymarin in the developed liposomal buccal delivery system, as the results show an increase in drug penetration compared to free drug powder.
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Affiliation(s)
- M S El-Samaligy
- Department of Pharmaceutics, Faculty of Pharmacy, Cairo University, Kasr El-aini Street, Cairo, Egypt
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81
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Abstract
Buccal formulations have been developed to allow prolonged localised therapy and enhanced systemic delivery. The buccal mucosa, however, while avoiding first-pass effects, is a formidable barrier to drug absorption, especially for biopharmaceutical products (proteins and oligonucleotides) arising from the recent advances in genomics and proteomics. The buccal route is typically used for extended drug delivery, so formulations that can be attached to the buccal mucosa are favoured. The bioadhesive polymers used in buccal drug delivery to retain a formulation are typically hydrophilic macro-molecules containing numerous hydrogen bonding groups. Newer second-generation bioadhesives have been developed and these include modified or new polymers that allow enhanced adhesion and/or drug delivery, in addition to site-specific ligands such as lectins. Over the last 20 years a wide range of formulations has been developed for buccal drug delivery (tablet, patch, liquids and semisolids) but comparatively few have found their way onto the market. Currently, this route is restricted to the delivery of a limited number of small lipophilic molecules that readily cross the buccal mucosa. However, this route could become a significant means for the delivery of a range of active agents in the coming years, if the barriers to buccal drug delivery are overcome. In particular, patient acceptability and the successful systemic delivery of large molecules (proteins, oligonucleotides and polysaccharides) via this route remains both a significant opportunity and challenge, and new/improved technologies may be required to address these.
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Affiliation(s)
- John D Smart
- School of Pharmacy and Biomolecular Sciences, University of Brighton, Lewes Road, Brighton BN2 4GJ, UK.
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82
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Birudaraj R, Berner B, Shen S, Li X. Buccal Permeation of Buspirone: Mechanistic Studies on Transport Pathways. J Pharm Sci 2005; 94:70-8. [PMID: 15761931 DOI: 10.1002/jps.20208] [Citation(s) in RCA: 48] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The transport of buspirone across porcine buccal mucosa in vitro was investigated to elucidate the mechanisms of transport and permeation enhancement. The apparent permeability increased with an increase in pH to a lesser degree than the dependence of the partition coefficient. Whereas the lipophilic or apparent transcellular pathway was found to be the dominant buccal transport route for buspirone, ionized species contributed significantly to transport at acidic pH. At neutral pH, bile salts did not increase the flux of the lipophilic species of buspirone, and in contrast to its effect on stratum corneum, aqueous propylene glycol alone did enhance the flux of buspirone across buccal mucosa in vitro. The use of an enhancer combination containing 5% oleic acid, 40% propylene glycol in buffer resulted in the greatest flux, and this was consistent with the effect of this combined enhancer on the flux of lipophilic drugs across stratum corneum and the dominance of the transcellular pathway for buspirone at neutral pH.
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Affiliation(s)
- Raj Birudaraj
- Thomas J. Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, California 95211, USA
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83
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