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Kumar A, Sahu RK, Chameettachal S, Pati F, Kumar A. Fabrication and analysis of chitosan oligosaccharide based mucoadhesive patch for oromucosal drug delivery. Drug Dev Ind Pharm 2022; 48:602-610. [PMID: 36369943 DOI: 10.1080/03639045.2022.2146705] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
OBJECTIVE Fabrication and analyses of mucoadhesive patches made from chitosan oligosaccharide for the purpose of oromucosal drug delivery. SIGNIFICANCE The mucosal epithelium in the oral cavity, consisting of buccal and sublingual epithelium, has gained significant attention in the last decade as an alternative anatomical site for systemic drug delivery that could potentially minimize the challenges of solid oral dosage and parenteral delivery. In this study, we have fabricated and tested drug-loaded chitosan oligosaccharide-based patches for the oromucosal drug delivery. METHODS The chitosan oligosaccharide (with and without alginate) based patches were fabricated using the conventional solvent casting method and were analyzed for their swelling capacity, hydrophilicity, anti-cancer activity, in vitro drug release, and in vivo drug release activity. The in-house developed artificial saliva was used for the swelling study. RESULTS Alginate-containing patches showed lesser swelling ability compared to the bare chitosan oligosaccharide-based patches. The former was also found to be more hydrophobic compared to the latter one. Both the unloaded patches restricted the growth of epithelial cancer cells indicating their anti-cancer behavior. In vitro drug release indicated a super case II release pattern while in vivo study demonstrated the release of drug from the patch into the plasma indicating the purpose of the fabricated patch. CONCLUSIONS The chitosan oligosaccharide-based mucoadhesive hydrogel patch fabricated in this study can be highly suitable for possible translational purposes.
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Affiliation(s)
- Ashwini Kumar
- Department of Biotechnology, National Institute of Technology, Raipur, Chhattisgarh, India.,Area of Biotechnology and Bioinformatics, NIIT University, Neemrana, Rajasthan, India
| | - Ram Kumar Sahu
- Department of Pharmacognosy, Columbia Institute of Pharmacy, Raipur, Chhattisgarh, India.,Department of Pharmaceutical Science, Assam University, Silchar, Assam, India
| | - Shibu Chameettachal
- Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, Telangana, India
| | - Falguni Pati
- Department of Biomedical Engineering, Indian Institute of Technology, Hyderabad, Telangana, India
| | - Awanish Kumar
- Department of Biotechnology, National Institute of Technology, Raipur, Chhattisgarh, India
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Fayed ND, Arafa MF, Essa EA, El Maghraby GM. Lopinavir-menthol co-crystals for enhanced dissolution rate and intestinal absorption. J Drug Deliv Sci Technol 2022; 74:103587. [PMID: 35845293 PMCID: PMC9272570 DOI: 10.1016/j.jddst.2022.103587] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 06/27/2022] [Accepted: 07/08/2022] [Indexed: 12/25/2022]
Abstract
Lopinavir is an antiretroviral, antiparasitic agent and recently utilized in treatment of COVID-19. Unfortunately, lopinavir exhibited poor oral bioavailability due to poor dissolution, extensive pre-systemic metabolism, and significant P-glycoprotein intestinal efflux. Accordingly, the aim was to enhance dissolution rate and intestinal absorption of lopinavir. This employed co-processing with menthol which is believed to modify crystalline structures and inhibit intestinal efflux. Lopinavir was mixed with menthol at different molar ratios before ethanol assisted kneading. Formulations were evaluated using FTIR spectroscopy, differential scanning calorimetry (DSC), X-ray powder diffraction (XRD) and dissolution studies. Optimum ratio was utilized to assess lopinavir intestinal permeability. This employed in situ rabbit intestinal perfusion technique. FTIR, DSC and XRD indicated formation of lopinavir-menthol co-crystals at optimum molar ratio of 1:2. Additional menthol underwent phase separation due to possible self-association. Co-crystallization significantly enhanced lopinavir dissolution rate compared with pure drug to increase the dissolution efficiency from 24.96% in case of unprocessed lopinavir to 91.43% in optimum formulation. Lopinavir showed incomplete absorption from duodenum and jejuno-iliac segments with lower absorptive clearance from jejuno-ileum reflecting P-gp efflux. Co-perfusion with menthol increased lopinavir intestinal permeability. The study introduced menthol as co-crystal co-former for enhanced dissolution and augmented intestinal absorption of lopinavir.
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Wanasathop A, Patel PB, Choi HA, Li SK. Permeability of Buccal Mucosa. Pharmaceutics 2021; 13:1814. [PMID: 34834229 PMCID: PMC8624797 DOI: 10.3390/pharmaceutics13111814] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/24/2021] [Revised: 10/18/2021] [Accepted: 10/23/2021] [Indexed: 11/23/2022] Open
Abstract
The buccal mucosa provides an alternative route of drug delivery that can be more beneficial compared to other administration routes. Although numerous studies and reviews have been published on buccal drug delivery, an extensive review of the permeability data is not available. Understanding the buccal mucosa barrier could provide insights into the approaches to effective drug delivery and optimization of dosage forms. This paper provides a review on the permeability of the buccal mucosa. The intrinsic permeability coefficients of porcine buccal mucosa were collected. Large variability was observed among the published permeability data. The permeability coefficients were then analyzed using a model involving parallel lipoidal and polar transport pathways. For the lipoidal pathway, a correlation was observed between the permeability coefficients and permeant octanol/water partition coefficients (Kow) and molecular weight (MW) in a subset of the permeability data under specific conditions. The permeability analysis suggested that the buccal permeation barrier was less lipophilic than octanol. For the polar pathway and macromolecules, a correlation was observed between the permeability coefficients and permeant MW. The hindered transport analysis suggested an effective pore radius of 1.5 to 3 nm for the buccal membrane barrier.
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Affiliation(s)
| | | | | | - S. Kevin Li
- Division of Pharmaceutical Sciences, College of Pharmacy, University of Cincinnati, 231 Albert Sabin Way, MSB # 3005, Cincinnati, OH 45267, USA; (A.W.); (P.B.P.); (H.A.C.)
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4
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Fabrication and Characterization of Fast-Dissolving Films Containing Escitalopram/Quetiapine for the Treatment of Major Depressive Disorder. Pharmaceutics 2021; 13:pharmaceutics13060891. [PMID: 34208460 PMCID: PMC8234593 DOI: 10.3390/pharmaceutics13060891] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2021] [Revised: 06/10/2021] [Accepted: 06/11/2021] [Indexed: 11/25/2022] Open
Abstract
Major depressive disorder (MMD) is a leading cause of disability worldwide. Approximately one-third of patients with MDD fail to achieve response or remission leading to treatment-resistant depression (TRD). One of the psychopharmacological strategies to overcome TRD is using a combination of an antipsychotic as an augmenting agent with selective serotonin reuptake inhibitors (SSRIs). Among which, an atypical antipsychotic, quetiapine (QUE), and an SSRI, escitalopram (ESC), were formulated as a fixed-dose combination as a fast-dissolving film by coaxial electrospinning. The resultant fiber’s morphology was studied. SEM images showed that the drug-loaded fibers were smooth, un-beaded, and non-porous with a fiber diameter of 0.9 ± 0.1 µm, while the TEM images illustrated the distinctive layers of the core and shell, confirming the successful preparation of these fibers. Differential scanning calorimetry (DSC) and X-ray diffraction (XRD) studies confirmed that both drugs were amorphously distributed within the drug-loaded fibers. The drug-loaded fibers exhibited a disintegration time of 2 s, which accelerated the release of both drugs (50% after 5 min) making it an attractive formulation for oral mucosal delivery. The ex vivo permeability study demonstrated that QUE was permeated through the buccal membrane, but not ESC that might be hindered by the buccal epithelium and the intercellular lipids. Overall, the developed coaxial fibers could be a potential buccal dosage form that could be attributed to higher acceptability and adherence among vulnerable patients, particularly mentally ill patients.
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Development, optimization and in-vivo evaluation of cyanocobalamin loaded orodispersible films using hot-melt extrusion technology: A quality by design (QbD) approach. J Drug Deliv Sci Technol 2021. [DOI: 10.1016/j.jddst.2021.102559] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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6
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Bagdas D, Cam B, Gul Z, Scott MM, Tyndale RF, Buyukuysal RL, Damaj MI, Gurun MS. Impact of Menthol on Oral Nicotine Consumption in Female and Male Sprague Dawley Rats. Nicotine Tob Res 2020; 22:196-203. [PMID: 30753589 DOI: 10.1093/ntr/ntz019] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2018] [Accepted: 02/05/2019] [Indexed: 12/18/2022]
Abstract
INTRODUCTION One of the preferable flavors in oral nicotine delivery systems is menthol which masks the harshness of tobacco. However, possible interactions between oral menthol and nicotine on intake and preference remain unclear. Therefore, we aimed to determine the impact of menthol on oral nicotine consumption. METHODS Adult Sprague Dawley female and male rats (n = 8 per group) were given a choice of water or drug solution by using two-bottle free choice paradigm for 2 weeks: vehicle (5% ethanol), nicotine (20 mg/L), menthol (1 g/L) and mentholated nicotine groups. At the end of the study, plasma nicotine levels were determined. RESULTS When rats were given a choice of nicotine or water, nicotine intake was similar between female and male rats. Menthol addition to nicotine solution significantly increased nicotine intake and preference in male but not female rats without a considerable effect on total fluid intake and body weight change in either sex. The average nicotine intake in male rats was 0.5 ± 0.05 and 1.4 ± 0.12 mg/kg/day for nicotine and menthol-nicotine combination (p < .05), respectively. The average nicotine intake in female rats was 0.6 ± 0.05 and 0.6 ± 0.03 mg/kg/day for nicotine and menthol-nicotine combination (p > .05), respectively. Plasma nicotine levels were not significantly different between the groups in either male (nicotine group: 20.8 ± 4.9, mentholated nicotine group: 31.9 ± 3.2 ng/mL) or female (nicotine group: 24.0 ± 3.3, mentholated nicotine group: 17.8 ± 2.9 ng/mL) rats (p > .05). CONCLUSIONS Menthol increases oral nicotine consumption in male, but not female, rats. IMPLICATIONS This study may provide data on the co-use of menthol and nicotine in smokeless tobacco, particularly oral dissolvable tobacco products.
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Affiliation(s)
- Deniz Bagdas
- The Center for the Study for Tobacco Products, Virginia Commonwealth University, Richmond, VA.,Department of Psychiatry, Yale School of Medicine, New Haven, CT
| | - Betul Cam
- Department of Emergency Medicine, Bagcilar Training and Research Hospital, Istanbul, Turkey
| | - Zulfiye Gul
- Department of Pharmacology, School of Medicine, Bahcesehir University, Istanbul, Turkey
| | - Michael M Scott
- Department of Pharmacology, School of Medicine, University of Virginia, Charlottesville, VA
| | - Rachel F Tyndale
- Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health (CAMH), Departments of Pharmacology and Toxicology, and Psychiatry, University of Toronto, Toronto, ON, Canada
| | | | - M Imad Damaj
- The Center for the Study for Tobacco Products, Virginia Commonwealth University, Richmond, VA.,Department of Pharmacology and Toxicology, Medical College of Virginia, Virginia Commonwealth University, Richmond, VA
| | - Mine Sibel Gurun
- Department of Pharmacology, Faculty of Medicine, Uludag University, Bursa, Turkey
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7
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Eleftheriadis GK, Monou PK, Bouropoulos N, Boetker J, Rantanen J, Jacobsen J, Vizirianakis IS, Fatouros DG. Fabrication of Mucoadhesive Buccal Films for Local Administration of Ketoprofen and Lidocaine Hydrochloride by Combining Fused Deposition Modeling and Inkjet Printing. J Pharm Sci 2020; 109:2757-2766. [PMID: 32497597 DOI: 10.1016/j.xphs.2020.05.022] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2020] [Revised: 04/28/2020] [Accepted: 05/19/2020] [Indexed: 12/17/2022]
Abstract
In the area of developing oromucosal drug delivery systems, mucoadhesive buccal films are the most promising formulations for either systemic or local drug delivery. The current study presents the fabrication of buccal films, by combining fused deposition modeling (FDM) and inkjet printing. Hydroxypropyl methylcellulose-based films were fabricated via FDM, containing the non-steroidal anti-inflammatory drug ketoprofen. Unidirectional release properties were achieved, by incorporating an ethyl cellulose-based backing layer. The local anesthetic lidocaine hydrochloride, combined with the permeation enhancer l-menthol, was deposited onto the film by inkjet printing. Physicochemical analysis showed alterations in the characteristics of the films, and the mucoadhesive and mechanical properties were effectively modified, due to the ink deposition on the substrates. The in vitro release data of the active pharmaceutical compounds, as well as the permeation profiles across ex vivo porcine buccal mucosa and filter-grown TR146 cells of human buccal origin, were associated with the presence of the permeation enhancer and the backing layer. The lack of any toxicity of the fabricated films was demonstrated by the MTT viability assay. This proof-of-concept study provides an alternative formulation approach of mucoadhesive buccal films, intended for the treatment of local oromucosal diseases or systemic drug delivery.
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Affiliation(s)
- Georgios K Eleftheriadis
- Laboratory of Pharmaceutical Technology, Department of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Paraskevi Kyriaki Monou
- Laboratory of Pharmaceutical Technology, Department of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Nikolaos Bouropoulos
- Department of Materials Science, University of Patras, 26504 Rio, Patras, Greece; Foundation for Research and Technology Hellas, Institute of Chemical Engineering and High Temperature Chemical Processes, 26504 Patras, Greece
| | - Johan Boetker
- Department of Pharmacy, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Jukka Rantanen
- Department of Pharmacy, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Jette Jacobsen
- Department of Pharmacy, University of Copenhagen, Copenhagen DK-2100, Denmark
| | - Ioannis S Vizirianakis
- Laboratory of Pharmacology, Department of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece
| | - Dimitrios G Fatouros
- Laboratory of Pharmaceutical Technology, Department of Pharmacy, Aristotle University of Thessaloniki, 54124 Thessaloniki, Greece.
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Transbuccal delivery of benznidazole associated with monoterpenes: permeation studies and mechanistic insights. Eur J Pharm Sci 2020; 143:105177. [PMID: 31812716 DOI: 10.1016/j.ejps.2019.105177] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2019] [Revised: 11/27/2019] [Accepted: 12/04/2019] [Indexed: 12/16/2022]
Abstract
Benznidazole (BZN) represents the only drug currently available for the treatment of Chagas disease in most endemic countries. When administered orally, high doses are required due to its extensive hepatic metabolism and its toxicity represents the main reason for treatment withdrawals. Because of these complications, transbuccal administration of BZN was investigated. This route avoids the first-pass hepatic metabolism and presents high permeability, with direct access to the systemic circulation. BZN was applied on porcine buccal mucosa after pretreatment with pure eugenol, carvacrol or limonene. Thermal (DSC) and spectroscopic (FT-IR) analyzes were performed to investigate the mechanisms of drug absorption enhancement. The permeability coefficient values of BZN increased 2.6, 2.9 and 4.9-fold after pretreatment with eugenol, carvacrol and limonene, respectively. The lag time, in turn, was shortened in the pretreated samples. The DSC and FT-IR analyzes suggested that transport of BZN through the buccal mucosa is associated with log P and size of monoterpenes. Limonene, the most effective absorption enhancer, contributed to greater interaction with non-polar domains of the buccal epithelium. Overall, BZN showed to be efficiently transported through the buccal route, but in vivo pharmacokinetic studies should be performed to confirm these findings.
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9
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Hua S. Advances in Nanoparticulate Drug Delivery Approaches for Sublingual and Buccal Administration. Front Pharmacol 2019; 10:1328. [PMID: 31827435 PMCID: PMC6848967 DOI: 10.3389/fphar.2019.01328] [Citation(s) in RCA: 74] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2019] [Accepted: 10/15/2019] [Indexed: 01/16/2023] Open
Abstract
The sublingual and buccal routes of administration have significant advantages for both local and systemic drug delivery. They have shown to be an effective alternative to the traditional oral route, especially when fast onset of action is required. Drugs can be rapidly and directly absorbed into the systemic circulation via venous drainage to the superior vena cava. Therefore, they are useful for drugs that undergo high hepatic clearance or degradation in the gastrointestinal tract, and for patients that have swallowing difficulties. Drugs administered via the sublingual and buccal routes are traditionally formulated as solid dosage forms (e.g., tablets, wafers, films, and patches), liquid dosage forms (e.g., sprays and drops), and semi-solid dosage forms (e.g., gels). Conventional dosage forms are commonly affected by physiological factors, which can reduce the contact of the formulation with the mucosa and lead to unpredictable drug absorption. There have been a number of advances in formulation development to improve the retention and absorption of drugs in the buccal and sublingual regions. This review will focus on the physiological aspects that influence buccal and sublingual drug delivery and the advances in nanoparticulate drug delivery approaches for sublingual and buccal administration. The clinical development pipeline with formulations approved and in clinical trials will also be addressed.
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Affiliation(s)
- Susan Hua
- Therapeutic Targeting Research Group, School of Biomedical Sciences and Pharmacy, University of Newcastle, Callaghan, NSW, Australia.,Hunter Medical Research Institute, New Lambton Heights, NSW, Australia
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Peterson B, Weyers M, Steenekamp JH, Steyn JD, Gouws C, Hamman JH. Drug Bioavailability Enhancing Agents of Natural Origin (Bioenhancers) that Modulate Drug Membrane Permeation and Pre-Systemic Metabolism. Pharmaceutics 2019; 11:pharmaceutics11010033. [PMID: 30654429 PMCID: PMC6359194 DOI: 10.3390/pharmaceutics11010033] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2018] [Revised: 12/23/2018] [Accepted: 12/24/2018] [Indexed: 12/22/2022] Open
Abstract
Many new chemical entities are discovered with high therapeutic potential, however, many of these compounds exhibit unfavorable pharmacokinetic properties due to poor solubility and/or poor membrane permeation characteristics. The latter is mainly due to the lipid-like barrier imposed by epithelial mucosal layers, which have to be crossed by drug molecules in order to exert a therapeutic effect. Another barrier is the pre-systemic metabolic degradation of drug molecules, mainly by cytochrome P450 enzymes located in the intestinal enterocytes and liver hepatocytes. Although the nasal, buccal and pulmonary routes of administration avoid the first-pass effect, they are still dependent on absorption of drug molecules across the mucosal surfaces to achieve systemic drug delivery. Bioenhancers (drug absorption enhancers of natural origin) have been identified that can increase the quantity of unchanged drug that appears in the systemic blood circulation by means of modulating membrane permeation and/or pre-systemic metabolism. The aim of this paper is to provide an overview of natural bioenhancers and their main mechanisms of action for the nasal, buccal, pulmonary and oral routes of drug administration. Poorly bioavailable drugs such as large, hydrophilic therapeutics are often administered by injections. Bioenhancers may potentially be used to benefit patients by making systemic delivery of these poorly bioavailable drugs possible via alternative routes of administration (i.e., oral, nasal, buccal or pulmonary routes of administration) and may also reduce dosages of small molecular drugs and thereby reduce treatment costs.
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Affiliation(s)
- Bianca Peterson
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa.
| | - Morné Weyers
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa.
| | - Jan H Steenekamp
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa.
| | - Johan D Steyn
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa.
| | - Chrisna Gouws
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa.
| | - Josias H Hamman
- Centre of Excellence for Pharmaceutical Sciences (Pharmacen™), North-West University, Potchefstroom 2520, South Africa.
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Quintanilha NP, dos Santos Miranda Costa I, Freiman de Souza Ramos M, Campos de Oliveira Miguel N, Riemma Pierre MB. α-Bisabolol improves 5-aminolevulinic acid retention in buccal tissues: Potential application in the photodynamic therapy of oral cancer. JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY B-BIOLOGY 2017; 174:298-305. [DOI: 10.1016/j.jphotobiol.2017.08.013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2017] [Revised: 07/13/2017] [Accepted: 08/07/2017] [Indexed: 11/29/2022]
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12
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Choonara BF, Choonara YE, Kumar P, du Toit LC, Pillay V. Design of an In Situ Cross-Linked Eutectic Tablet for Enhanced Delivery of Gastro-Sensitive Proteins and Peptides. J Pharm Sci 2016; 105:2086-98. [DOI: 10.1016/j.xphs.2016.04.005] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 03/11/2016] [Accepted: 04/05/2016] [Indexed: 10/21/2022]
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13
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Baumgartner R, Teubl BJ, Tetyczka C, Roblegg E. Rational Design and Characterization of a Nanosuspension for Intraoral Administration Considering Physiological Conditions. J Pharm Sci 2016; 105:257-67. [DOI: 10.1016/j.xphs.2015.10.021] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2015] [Revised: 10/14/2015] [Accepted: 10/23/2015] [Indexed: 12/29/2022]
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Sex-specific effects of cigarette mentholation on brain nicotine accumulation and smoking behavior. Neuropsychopharmacology 2015; 40:884-92. [PMID: 25267342 PMCID: PMC4330502 DOI: 10.1038/npp.2014.263] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/10/2014] [Revised: 09/04/2014] [Accepted: 09/26/2014] [Indexed: 11/08/2022]
Abstract
Menthol cigarettes are likely associated with greater risks of smoking dependence than non-menthol cigarettes. We sought to test the hypothesis that menthol increases the rate of brain nicotine accumulation (BNA) during smoking and thereby enhances its addictive effects. In a counter-balanced cross-over design, 10 menthol and 9 non-menthol smokers (10 females and 9 males; mean age 44.3) underwent two study phases. In each phase, the participant smoked exclusively either menthol or non-menthol research cigarettes for approximately 1 week prior to a positron emission tomography (PET) scan session, during which the subject's head was scanned following inhalation of a single puff of smoke from a cigarette containing (11)C-nicotine. No differences in initial slope, Cmax, area under curve (AUC), and T1/2 of BNA were found between menthol and non-menthol cigarettes across all subjects; however, menthol relative to non-menthol cigarettes were associated with steeper initial slopes in men (p=0.008). Unexpectedly, women had faster BNA as indicated by greater values of the initial slope, Cmax, AUC, and shorter T1/2 than men (all ps<0.04). The rates of BNA were significantly correlated with ratings of smoking motivations of getting a 'rush', getting relaxing effects and marginally with alleviation of craving. These results do not provide strong support for the putative role of menthol in enhancing BNA, although further studies should explore the apparent effect of menthol on BNA in men. Fast BNA during smoking and preference of sensory properties of menthol cigarettes may independently or jointly contribute to smoking dependence among women.
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15
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Kolli CS, Pather I. Characterization Methods for Oral Mucosal Drug Delivery. ADVANCES IN DELIVERY SCIENCE AND TECHNOLOGY 2015. [DOI: 10.1007/978-1-4899-7558-4_6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
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16
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Videira R, Castanheira P, Grãos M, Resende R, Salgueiro L, Faro C, Cavaleiro C. Dose-dependent inhibition of BACE-1 by the monoterpenoid 2,3,4,4-tetramethyl-5-methylenecyclopent-2-enone in cellular and mouse models of Alzheimer's disease. JOURNAL OF NATURAL PRODUCTS 2014; 77:1275-1279. [PMID: 24921156 DOI: 10.1021/np400903w] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACE-1 is an aspartic protease involved in the conversion of amyloid precursor protein (APP) to amyloid-β (Aβ) in vivo, which is one of the key steps in the development and progression of Alzheimer's disease. In a previous screening procedure for inhibitors of BACE-1 activity, the oil of Lavandula luisieri was identified as the most potent among several essential oils. The inhibitory effect of this essential oil on Aβ production was also demonstrated in a cellular assay. The composition of the volatile oil and the isolation of the compound responsible for the inhibitory activity were also reported. The present work focused on the characterization of the inhibition of BACE-1 by this active compound, a monoterpene necrodane ketone, 2,3,4,4-tetramethyl-5-methylenecyclopent-2-enone (1), with assessment of its Ki value and the type of inhibition. The dose-related effects of the compound were also evaluated using two different cell lines, with determinations of the respective EC50 values. The entire oil and the 2,3,4,4-tetramethyl-5-methylenecyclopent-2-enone (1) were tested on a triple transgenic mouse model of Alzheimer's disease. The overall results showed that compound 1 displayed a dose-dependent inhibition of BACE-1 in cellular and mouse models of Alzheimer's disease and is therefore capable of passing through cellular membranes and the blood-brain barrier.
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Affiliation(s)
- Rita Videira
- Center of Pharmaceutical Studies, Faculty of Pharmacy, University of Coimbra , Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548 Coimbra, Portugal
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Sattar M, Sayed OM, Lane ME. Oral transmucosal drug delivery--current status and future prospects. Int J Pharm 2014; 471:498-506. [PMID: 24879936 DOI: 10.1016/j.ijpharm.2014.05.043] [Citation(s) in RCA: 77] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2014] [Revised: 05/14/2014] [Accepted: 05/26/2014] [Indexed: 10/25/2022]
Abstract
Oral transmucosal drug delivery (OTDD) dosage forms have been available since the 1980s. In contrast to the number of actives currently delivered locally to the oral cavity, the number delivered as buccal or sublingual formulations remains relatively low. This is surprising in view of the advantages associated with OTDD, compared with conventional oral drug delivery. This review examines a number of aspects related to OTDD including the anatomy of the oral cavity, models currently used to study OTDD, as well as commercially available formulations and emerging technologies. The limitations of current methodologies to study OTDD are considered as well as recent publications and new approaches which have advanced our understanding of this route of drug delivery.
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Affiliation(s)
- Mohammed Sattar
- Department of Pharmaceutics, UCL School of Pharmacy, 29-39 Brunswick Square, London WC1 N 1AX, United Kingdom; Department of Pharmaceutics, College of Pharmacy, University of Basrah, Basrah, Iraq
| | - Ossama M Sayed
- Department of Pharmaceutics, UCL School of Pharmacy, 29-39 Brunswick Square, London WC1 N 1AX, United Kingdom; Pharmaceutics Department, Faculty of Pharmacy, Beni Suef University, P.O. Box 62514, Egypt
| | - Majella E Lane
- Department of Pharmaceutics, UCL School of Pharmacy, 29-39 Brunswick Square, London WC1 N 1AX, United Kingdom.
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Ojewole E, Kalhapure R, Akamanchi K, Govender T. Novel oleic acid derivatives enhance buccal permeation of didanosine. Drug Dev Ind Pharm 2014; 40:657-68. [PMID: 24592892 DOI: 10.3109/03639045.2014.892958] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023]
Abstract
The aim of this study was to explore the potential of novel oleic acid (OA) derivatives as buccal permeation enhancers for the delivery of didanosine (ddI). The OA derivatives, i.e. ester derivative (OA1E), the dicarboxylic acid derivative (OA1A) and the bicephalous dianionic surfactant (OA1ANa) were synthesized and their effects were compared to the parent OA. OA, OA1E, OA1A and OA1ANa at 1% w/w all showed potential for enhancing the buccal permeability of ddI with enhancement ratio (ER) of 1.29, 1.33, 1.01 and 1.72, respectively. OA1ANa at 1% w/w demonstrated the highest flux (80.30 ± 10.37 µg cm(-2 )h), permeability coefficient (4.01 ± 0.57 × 10(-3) cm h(-1)) and ER (1.72). The highest flux for ddI (144.00 ± 53.54 µg cm(-2 )h) was reported with OA1ANa 2% w/w, which displayed an ER of 3.09 more than that with ddI alone. At equivalent concentrations, OA1ANa (ER = 3.09) had a significantly higher permeation-enhancing effect than its parent OA (ER = 1.54). Histomorphological studies confirmed that OA1ANa at all concentrations (0.5, 2.0 and 6.0% w/w) had no adverse effects on the mucosae. Morphological changes such as vacuoles formation and increased intercellular spaces were attributed to the buccal permeation-enhancing effect of OA1ANa. This study demonstrated the potential of novel OA derivatives as buccal permeation enhancers. OA1ANa at 2% w/w was also identified as the optimal novel OA derivative to widen the pool of fatty acid derivatives as chemical permeation enhancers for buccal drug delivery.
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Affiliation(s)
- Elizabeth Ojewole
- Discipline of Pharmaceutical Sciences, School of Health Sciences, University of KwaZulu-Natal , Durban, KwaZulu-Natal , South Africa and
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Jones E, Ojewole E, Kalhapure R, Govender T. In vitrocomparative evaluation of monolayered multipolymeric films embedded with didanosine-loaded solid lipid nanoparticles: a potential buccal drug delivery system for ARV therapy. Drug Dev Ind Pharm 2014; 40:669-79. [DOI: 10.3109/03639045.2014.892957] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
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Pharmacokinetics and dose proportionality of fentanyl sublingual spray: a single-dose 5-way crossover study. Clin Drug Investig 2013; 33:391-400. [PMID: 23605506 DOI: 10.1007/s40261-013-0079-8] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
Abstract
BACKGROUND Fentanyl sublingual spray is a novel formulation of fentanyl for sublingual delivery that was designed to enhance the rate and extent of absorption of fentanyl for management of breakthrough cancer pain (BTCP). OBJECTIVES The primary objective of this study was to determine the pharmacokinetics and dose proportionality of 5 different doses (100, 200, 400, 600, and 800 μg) of fentanyl sublingual spray in healthy subjects under fasted conditions (part A); the secondary objective was to assess the effects of temperature and pH in the oral cavity on relative bioavailability of fentanyl (part B). METHODS Analyses were performed on venous blood samples drawn 5 min to 36 h after administration of fentanyl sublingual spray (Subsys(®), Insys Therapeutics, Inc., Chandler, AZ, USA). Part A of this phase I study was a 5-treatment, 5-sequence, 5-period crossover study in which subjects received a single treatment of each of the 5 fentanyl sublingual spray doses. Dose proportionality was assessed using analysis of variance and linear regression techniques. Part B was a 5-treatment, 2-sequence, 5-period crossover study in which subjects received a single assigned dose of fentanyl sublingual spray 200 μg under the following 5 conditions: no pretreatment, pretreatment with cold or hot beverage, and pretreatment with low- or high-pH beverage. Naltrexone was administered to block potential opioid effects associated with fentanyl. Adverse events (AEs) were monitored and recorded throughout the study. RESULTS Fifty-three subjects (15 men, 38 women; mean age, 31 years) were enrolled in part A. Fourteen subjects (11 men, 3 women; mean age, 32 years) were enrolled in part B. The first quantifiable mean plasma concentrations of fentanyl were observed at the first sample time (5 min) for all doses. Mean maximum plasma concentration (C(max)) increased with increases in dose, whereas median time to reach C max (t max) tended to decrease with increases in dose. The dose-normalized C(max), area under the plasma concentration-time curve from time zero to infinity (AUC∞), and AUC from time zero to time of last measurable concentration (AUClast) values were linear and consistent with dose proportionality across the 100-800 μg dose range. Pretreatment of the oral cavity with a cold or hot beverage, or low- or high-pH beverage, did not appreciably alter fentanyl absorption (C(max) and AUC∞ values). The most commonly reported AEs were nausea and vomiting. CONCLUSIONS In healthy subjects, administration of fentanyl sublingual spray produced a rapid rise in fentanyl plasma concentrations. Dose-dependent parameters (C max and AUC) showed dose proportionality across the range of 100-800 μg. Altering the local environment of the oral cavity (temperature and pH) showed no effects on the bioavailability of fentanyl. The rapid and predictable rise in plasma fentanyl concentrations following administration of fentanyl sublingual spray corresponds with the rapid onset and duration of many BTCP episodes.
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Mishina EV, Hoffman AC. Clinical Pharmacology Research Strategy for Dissolvable Tobacco Products. Nicotine Tob Res 2013; 16:253-62. [DOI: 10.1093/ntr/ntt182] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
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Jones E, Ojewole E, Pillay V, Kumar P, Rambharose S, Govender T. Monolayered multipolymeric buccal films with drug and polymers of opposing solubilities for ARV therapy: Physico-mechanical evaluation and molecular mechanics modelling. Int J Pharm 2013; 455:197-212. [DOI: 10.1016/j.ijpharm.2013.07.037] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/27/2013] [Revised: 07/13/2013] [Accepted: 07/15/2013] [Indexed: 10/26/2022]
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Parikh N, Goskonda V, Chavan A, Dillaha L. Single-dose pharmacokinetics of fentanyl sublingual spray and oral transmucosal fentanyl citrate in healthy volunteers: a randomized crossover study. Clin Ther 2013; 35:236-43. [PMID: 23497761 DOI: 10.1016/j.clinthera.2013.02.017] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2012] [Revised: 02/15/2013] [Accepted: 02/15/2013] [Indexed: 11/15/2022]
Abstract
BACKGROUND Fentanyl sublingual spray (FSS) is a novel fentanyl formulation recently developed for the treatment of breakthrough cancer pain, which is characterized by a fast onset and a relatively short duration. OBJECTIVE To compare rate of absorption and systemic bioavailability between FSS and oral transmucosal fentanyl citrate (OTFC) in healthy volunteers. METHODS This randomized 3-way crossover study involved 29 healthy volunteers (25 men and 4 women; mean age, 35 years) who received single doses of FSS (400 μg), OTFC (400 μg), and intravenous fentanyl citrate (100 μg) separated by washout periods of ≥7 days. Oral naltrexone was given to minimize potential adverse effects of fentanyl. Plasma fentanyl concentrations were measured for 36 hours after each dose for the calculation of pharmacokinetic parameters. RESULTS Mean Cmax values of fentanyl were higher with FSS versus OTFC (0.81 ng/mL vs 0.61 ng/mL) and were attained more quickly; the median Tmax was 1.5 hours with FSS and 2.0 hours with OTFC (P < 0.05). Furthermore, potentially effective fentanyl concentrations were achieved more quickly with FSS than with OTFC. Five and 10 minutes after administration, mean plasma concentrations were 19.0% and 53.7% of Cmax with FSS, respectively, compared with levels below the lower limit of assay quantification and 6.1%, respectively, with OTFC. Plasma concentrations of fentanyl at 10 minutes with FSS were equivalent to those with OTFC at 60 minutes. The Cmax and AUCs were approximately 33% to 36% greater with FSS than with OTFC, and the 90% CIs of the geometric mean ratios for each parameter fell outside the bioequivalence range of 80% to 125%. Systemic bioavailability was also greater with FSS than with OTFC (approximately 76% vs 51%). All 3 fentanyl treatments were well tolerated. All reported adverse events were mild and consistent with those previously reported in healthy volunteers receiving transmucosal fentanyl with naltrexone, and none occurred in >2 participants during any treatment period. CONCLUSIONS Absorption of fentanyl in this study was faster and bioavailability was greater with FSS than with OTFC. The pharmacokinetic profile of the sublingual spray closely matches the duration of onset to pain intensity in a breakthrough cancer pain episode. These findings suggest that FSS is appropriate for the treatment of breakthrough cancer pain. ClinicalTrials.gov identifier: NCT01780233.
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Affiliation(s)
- Neha Parikh
- INSYS Therapeutics Inc, Chandler, AZ 85224, USA.
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Abstract
Breakthrough cancer pain (BTCP) is defined as a transient exacerbation of pain that arises in patients with otherwise controlled persistent pain. BTCP typically has a rapid onset and relatively short duration, but it causes a significant amount of physical and psychological distress for patients. Several rapid-onset fentanyl formulations have been introduced in the USA to replace traditional oral opioids for the treatment of BTCP: a transmucosal lozenge, a sublingual orally disintegrating tablet, a buccal tablet, a buccal soluble film, a pectin nasal spray and, the newest formulation to enter the market, a sublingual spray. This article reviews the six rapid-onset formulations of fentanyl approved in the USA for the management of BTCP with emphasis on describing the published literature on fentanyl sublingual spray. The different fentanyl formulations vary in pharmacokinetic properties and ease of use, but all have a rapid onset and a relatively short duration of analgesia. Fentanyl sublingual spray has demonstrated absorption within 5 minutes of administration, with fentanyl plasma concentrations increasing over the first 30 minutes and remaining elevated for 60–90 minutes in pharmacokinetic studies in healthy subjects. Fentanyl sublingual spray shows linear dose proportionality, and changes in the temperature or acidity of the oral cavity do not alter its pharmacokinetic properties. In patients with BTCP, statistically significant pain relief is measurable at 5 minutes after administration of fentanyl sublingual spray, when compared with placebo, with significant pain relief lasting at least 60 minutes after administration. Adverse events are typical of opioid treatment and are considered mild to moderate in intensity. In summary, fentanyl sublingual spray provides rapid onset of analgesia and is a tolerable and effective treatment for BTCP.
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Rambharose S, Ojewole E, Mackraj I, Govender T. Comparative buccal permeability enhancement of didanosine and tenofovir by potential multifunctional polymeric excipients and their effects on porcine buccal histology. Pharm Dev Technol 2013; 19:82-90. [DOI: 10.3109/10837450.2012.752505] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Khdair A, Hamad I, Al-Hussaini M, Albayati D, Alkhatib H, Alkhalidi B. In Vitro Artificial Membrane-Natural Mucosa Correlation of Carvedilol Buccal Delivery. J Drug Deliv Sci Technol 2013. [DOI: 10.1016/s1773-2247(13)50092-x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Wu X, Desai KGH, Mallery SR, Holpuch AS, Phelps MP, Schwendeman SP. Mucoadhesive fenretinide patches for site-specific chemoprevention of oral cancer: enhancement of oral mucosal permeation of fenretinide by coincorporation of propylene glycol and menthol. Mol Pharm 2012; 9:937-45. [PMID: 22280430 DOI: 10.1021/mp200655k] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
The objective of this study was to enhance oral mucosal permeation of fenretinide by coincorporation of propylene glycol (PG) and menthol in fenretinide/Eudragit RL PO mucoadhesive patches. Fenretinide is an extremely hydrophobic chemopreventive compound with poor tissue permeability. Coincorporation of 5-10 wt % PG (mean J(s) = 16-23 μg cm⁻² h⁻¹; 158-171 μg of fenretinide/g of tissue) or 1-10 wt % PG + 5 wt % menthol (mean J(s) = 18-40 μg cm⁻² h⁻¹; 172-241 μg of fenretinide/g of tissue) in fenretinide/Eudragit RL PO patches led to significant ex vivo fenretinide permeation enhancement (p < 0.001). Addition of PG above 2.5 wt % in the patch resulted in significant cellular swelling in the buccal mucosal tissues. These alterations were ameliorated by combining both enhancers and reducing PG level. After buccal administration of patches in rabbits, in vivo permeation of fenretinide across the oral mucosa was greater (∼43 μg fenretinide/g tissue) from patches that contained optimized permeation enhancer content (2.5 wt % PG + 5 wt % menthol) relative to permeation obtained from enhancer-free patch (∼17 μg fenretinide/g tissue) (p < 0.001). In vitro and in vivo release of fenretinide from patch was not significantly increased by coincorporation of permeation enhancers, indicating that mass transfer across the tissue, and not the patch, largely determined the permeation rate control in vivo. As a result of its improved permeation and its lack of deleterious local effects, the mucoadhesive fenretinide patch coincorporated with 2.5 wt % PG + 5 wt % menthol represents an important step in the further preclinical evaluation of oral site-specific chemoprevention strategies with fenretinide.
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Affiliation(s)
- Xiao Wu
- Department of Pharmaceutical Sciences, University of Michigan, Ann Arbor, Michigan, USA
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Kulkarni UD, Mahalingam R, Li X, Pather I, Jasti B. Effect of experimental temperature on the permeation of model diffusants across porcine buccal mucosa. AAPS PharmSciTech 2011; 12:579-86. [PMID: 21538212 DOI: 10.1208/s12249-011-9624-z] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2010] [Accepted: 04/18/2011] [Indexed: 11/30/2022] Open
Abstract
The influence of experimental temperature on the permeability of model diffusants across porcine buccal mucosa was investigated in vitro. The permeability increased significantly as the experimental temperature was increased in increments of approximately 7°C. It was observed that the apparent permeability and temperature were related by an exponential relationship that conformed to the Arrhenius equation. Diffusants with higher lipophilicities--buspirone and bupivacaine--had lower activation energies for diffusion when compared to hydrophilic diffusants--antipyrine and caffeine. The activation energy for diffusion of the model diffusants decreased linearly with increasing distribution coefficients across porcine buccal mucosa. The results suggested that the buccal mucosa acts as a stronger barrier to the diffusion of hydrophilic diffusants than the lipophilic ones. The log-linear relationship between permeability and temperature indicates that temperature should be carefully controlled in diffusion experiments. These results also point to the possibility of developing heat-generating buccal delivery devices, especially for hydrophobic diffusants.
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Squier CA, Mantz MJ, Wertz PW. Effect of menthol on the penetration of tobacco carcinogens and nicotine across porcine oral mucosa ex vivo. Nicotine Tob Res 2010; 12:763-7. [PMID: 20511349 DOI: 10.1093/ntr/ntq084] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
INTRODUCTION Menthol is a flavored tobacco additive claimed to mask the bitter taste and reduce the harshness of cigarette smoke. (Azzi, C., Zhang, J., Purdon, C. H., Chapman, J. M., Nitcheva, D., Hebert, J. R., et al., 2006, Permeation and reservoir function of 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK) and benzo[a]pyrene (B[a]P) across porcine esophageal tissue in the presence of ethanol and menthol. Carcinogenesis, 27, 137-145). have shown that menthol increased the flux of tobacco carcinogens (TC) across porcine esophagus. As oral mucosa is exposed to both smoke and smokeless tobacco in tobacco users, the objective of this study was to determine whether menthol influenced the penetration of the TC nitrosonornicotine (NNN) across porcine buccal (BM) and floor of mouth (FM) mucosa. METHODS Porcine BM and FM were collected at slaughter, mounted in perfusion chambers (n = 7/group), and exposed to tritiated NNN ((3)H-NNN; Amersham, activity 1 muCi/ml) and tritiated nicotine ((3)H-nicotine; Sigma) in 3% nicotine/phosphate-buffered saline (0.01 M, pH 7.4) containing 0.01% unlabeled NNN (National Cancer Institute Chemical Carcinogen Repository) +/- 0.08% menthol for 0.5, 1, 2, or 12 hr. K(p) values (cm/min) were determined and statistically analyzed (analysis of variance, Tukey's, p < .05). RESULTS FM and BM permeability to both (3)H-NNN and (3)H-nicotine was significantly increased (p < .05) with addition of menthol over that of nicotine alone regardless of exposure times. Even short 30-min menthol exposure significantly increased the flux of both compounds, and this was maintained throughout the experiment. DISCUSSION Menthol enhances penetration of NNN and nicotine through FM and BM in vitro, even after short exposure. This may reflect loading of a superficial epithelial reservoir (Squier, C. A., Kremer, M. J., Bruskin, A., Rose, A., & Haley, J. D., 1999. Oral mucosal permeability and stability of transforming growth factor beta-3 in vitro. Pharmaceutical Research, 16, 1557-1563.), thus delivering menthol and enhancing flux for several hours. Practical implications are for a potentially increased oral exposure to carcinogens among users of menthol-flavored cigarettes and chewing tobacco.
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Affiliation(s)
- Christopher A Squier
- Dows Institute for Dental Research, College of Dentistry, University of Iowa, N406 DSB, Iowa City, IA 52242, USA.
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Kulkarni U, Mahalingam R, Pather I, Li X, Jasti B. Porcine buccal mucosa as in vitro model: effect of biological and experimental variables. J Pharm Sci 2010; 99:1265-77. [PMID: 19739112 DOI: 10.1002/jps.21907] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Porcine buccal mucosa has been used as an in vitro model to assess the potential of delivering a molecule via the transbuccal route. However, permeation studies across porcine buccal mucosa show high variability due to various experimental and biological factors. The variability associated with the use of different mucosal regions, tissue storage conditions and tissue processing methods on drug permeation was investigated in this study. The permeability of model diffusants was significantly higher in the region behind the lip when compared to the cheek region because the latter has a thicker epithelium. Porcine buccal mucosa retained its integrity in Kreb's bicarbonate ringer solution at 4 degrees C for 24 h while many other storage conditions resulted in loss of epithelial integrity. Separation of the epithelium from underlying connective tissue either surgically or by heat treatment resulted in an epithelial thickness of approximately 150 microm. Separation of epithelium from the underlying connective tissue by heat treatment did not adversely affect its permeability and integrity characteristics. Investigation of these important biological and experimental variables provides guidance for conducting in vitro transbuccal permeation studies.
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Affiliation(s)
- Upendra Kulkarni
- Department of Pharmaceutics, Thomas J. Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, California 95211, USA
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Sohi H, Ahuja A, Ahmad FJ, Khar RK. Critical evaluation of permeation enhancers for oral mucosal drug delivery. Drug Dev Ind Pharm 2010. [DOI: 10.3109/03639040903117348] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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Chen C, Isabelle LM, Pickworth WB, Pankow JF. Levels of mint and wintergreen flavorants: smokeless tobacco products vs. confectionery products. Food Chem Toxicol 2010; 48:755-63. [PMID: 20034536 DOI: 10.1016/j.fct.2009.12.015] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2009] [Revised: 12/05/2009] [Accepted: 12/16/2009] [Indexed: 10/20/2022]
Abstract
Nicotine and flavorant compound levels were measured in 10 "mint"-related sub-brands and 8 "wintergreen" sub-brands of smokeless tobacco (SLT). Also analyzed were "mint"-related and "wintergreen" confectionery products. Of the "mint" SLT, "Timberwolf Packs Mint Pouches" contained the highest menthol level (5.3 mg/g); the average for the five most-highly mentholated SLT products was 4.3 mg/g. The average for the most five most-highly mentholated confectionery products was 3.5 mg/g. For hard candy, a reported average of maximum use levels is 2.1 mg/g (Burdock, 2009). Of the "wintergreen" SLT, "Hawken Wintergreen" was found to contain the highest methyl salicylate (MS) level (29.7 mg/g). The average of the five highest SLT MS levels was 23.8 mg/g, i.e., 5x higher than the level found in the confectionery product with the highest MS level (LifeSavers Wint O Green Sugar Free, 4.6 mg/g). For hard candy, a reported average of maximum use levels is 2.0 mg/g (Burdock, 2009). Assuming 23.8 mg/g MS in SLT, SLT use at 15 g/day, 100% bodily absorption of the MS, and 60 kg body weight, the average daily intake would be 6.0 mg/kg-day, i.e., 12x the acceptable daily intake (ADI) of 0.5 mg/kg-day established for this compound by a joint FAO/WHO committee.
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Affiliation(s)
- C Chen
- Department of Chemistry, Portland State University, Portland, OR 97207, USA
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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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Kokate A, Li X, Williams PJ, Singh P, Jasti BR. In silico prediction of drug permeability across buccal mucosa. Pharm Res 2009; 26:1130-9. [PMID: 19184372 DOI: 10.1007/s11095-009-9831-4] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2008] [Accepted: 01/12/2009] [Indexed: 11/25/2022]
Abstract
PURPOSE To develop and validate a computational model capable of predicting buccal permeability based on various structural and physicochemical descriptors. METHODS Apparent permeability coefficients (K(p)) of 15 different drugs across porcine buccal mucosa were determined. Multiple linear regression (MLR) and maximum likelihood estimations (MLE) were used to develop the model based on a training set of 15 drugs with permeability as the response variable and the various descriptors as the predictor variables. The final model was validated with an external data set consisting of permeability values obtained from the literature. RESULTS Drug permeabilities ranged from 30 x 10(-6) (nimesulide) to 3.3 x 10(-9) cm/s (furosemide). Regression analysis showed that 95% of the variability in permeability data can be explained by a model that includes molecular volume, distribution coefficient at pH 6.8, number of hydrogen bond donors, and number of rotatable bonds. Smaller molecular size, high lipophilicity, lower hydrogen bond capability and greater flexibility were important for permeability. The buccal model was found to have a good predictive capability. CONCLUSION A simple model was developed and validated for predicting the buccal drug permeability. This model will be useful in assessing the feasibility of drugs for transbuccal delivery.
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Affiliation(s)
- Amit Kokate
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J. Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, California 95211, USA
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Kulkarni U, Mahalingam R, Pather S, Li X, Jasti B. Porcine Buccal Mucosa as an In Vitro Model: Relative Contribution of Epithelium and Connective Tissue as Permeability Barriers. J Pharm Sci 2009; 98:471-83. [DOI: 10.1002/jps.21436] [Citation(s) in RCA: 40] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Turina ADV, Nolan MV, Zygadlo JA, Perillo MA. Natural terpenes: Self-assembly and membrane partitioning. Biophys Chem 2006; 122:101-13. [PMID: 16563603 DOI: 10.1016/j.bpc.2006.02.007] [Citation(s) in RCA: 164] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2006] [Revised: 02/15/2006] [Accepted: 02/16/2006] [Indexed: 11/30/2022]
Abstract
Monoterpenes (MTs) are highly hydrophobic substances present in essential oils. They cover a wide spectrum of biological effects with a membrane interaction as a common point. Here we studied the surface activity of camphor, cineole, thymol, menthol and geraniol, and their ability to reach and incorporate into model membranes affecting some features of their dynamic organization. All the MTs studied self-aggregated in water with critical micellar concentrations (CMC) between 3 and 8 microM. Their octanol-water and membrane-water partition coefficients were correlated with one another. They all penetrated in monomolecular layers of dipalmitoyl-phosphatildylcholine at the air-water interface, even at surface pressures (pi) above the equilibrium lateral pressure of bilayers; thymol exhibited the highest (61.3 mN/m) and camphor the lowest (37 mN/m) pi(cut-off) value. They affected the self-aggregation of Triton X-100, increasing its CMC from 0.16 mM in the absence of MTs up to 0.68 mM (e.g. for geraniol), and the topology of sPC vesicles, increasing its surface curvature, suggesting their location at the polar head group region of the membrane. The latter was supported by their ability to increase differentially the polarity of the membrane environment sensed by two electrochromic dyes. Dipole moment values (between 1.224 and 2.523 D) and solvation areas (between 80 and 97 A(2)) were calculated from their energy-minimized structures. The relative contribution of each experimental, theoretical and structural property to determine MTs' effects on membrane dynamics were evaluated by a principal component analysis.
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Affiliation(s)
- A del V Turina
- Biofísica-Química, Departamento de Química, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de Córdoba, Av. Vélez Sarsfield 1611, 5016 Córdoba, Argentina
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Rose JE. Nicotine and nonnicotine factors in cigarette addiction. Psychopharmacology (Berl) 2006; 184:274-85. [PMID: 16362402 DOI: 10.1007/s00213-005-0250-x] [Citation(s) in RCA: 257] [Impact Index Per Article: 14.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/20/2004] [Accepted: 11/01/2005] [Indexed: 11/25/2022]
Abstract
RATIONALE A great deal of research supports the role of nicotine in cigarette addiction. However, the effectiveness of nicotine replacement therapy (NRT) as a smoking cessation treatment has fallen short of initial hopes. A key reason may be that NRT does not address nonnicotine components of smoking reinforcement. These include constituents that provide reinforcing sensory stimulation, components that minimize excessive irritation from inhaled nicotine and other pharmacologically active compounds in cigarette smoke. OBJECTIVE Studies using various paradigms to dissociate nicotine from other components of smoking are summarized. RESULTS Nonnicotine components provide many rewarding effects, often surpassing the direct effects of nicotine. Substitutes for the sensory effects of smoking may be effective in relieving craving for cigarettes and in facilitating smoking cessation. Moreover, techniques for devaluing smoking-related cues may decrease craving and enhance subsequent abstinence. Promising approaches for devaluing smoke cues include extinction-based treatments employing denicotinized cigarettes and the use of nicotinic agonist and/or antagonist treatment during the weeks leading up to a quit attempt. Recent studies suggest that incorporating these approaches into a treatment program may significantly increase smoking abstinence rates. Preliminary findings also suggest that replacement of the effects of monoamine oxidase inhibitors contained in cigarette smoke may enhance quit rates. CONCLUSIONS While current NRT methods have been the mainstay of smoking cessation treatment and will likely continue to serve a useful role, the next stage of progress will likely entail the development of tools designed with recognition of the importance of nonnicotine components of cigarette smoking.
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Affiliation(s)
- Jed E Rose
- Center for Nicotine and Smoking Cessation Research, Duke University Medical Center, 2424 Erwin Road, Suite 201, Durham, NC 27705, USA.
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Zhang L, Barritt GJ. Evidence that TRPM8 is an androgen-dependent Ca2+ channel required for the survival of prostate cancer cells. Cancer Res 2005; 64:8365-73. [PMID: 15548706 DOI: 10.1158/0008-5472.can-04-2146] [Citation(s) in RCA: 233] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
The Ca(2+)-permeable channel TRPM8 is thought to play an important role in the pathophysiology of prostate cancer. We have investigated the intracellular location of TRPM8 and its role as a Ca(2+)-permeable channel in an androgen-responsive and an androgen-insensitive prostate cancer cell line. We report evidence from immunofluorescence experiments that in the androgen-responsive LNCaP cell line, the TRPM8 protein is expressed in the endoplasmic reticulum and plasma membrane, acts as a Ca(2+)-permeable channel (assessed using Fura-2 to measure increases in the cytoplasmic Ca(2+) concentration) in each of these membranes, and is regulated by androgen. Although TRPM8 was detected in the androgen-insensitive PC-3 cell line, no evidence was obtained for regulation of its expression by androgen. The results of experiments using LNCaP cells, the TRPM8 antagonist capsazepine, and small interference RNA targeted to TRPM8 indicate that TRPM8 is required for cell survival. These results indicate that TRPM8 is an important determinator of Ca(2+) homeostasis in prostate epithelial cells and may be a potential target for the action of drugs in the management of prostate cancer.
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Affiliation(s)
- Lei Zhang
- Department of Human Physiology and Centre for Neuroscience, Flinders University, Adelaide, South Australia, Australia.
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Cui CY, Lu WL, Xiao L, Zhang SQ, Huang YB, Li SL, Zhang RJ, Wang GL, Zhang X, Zhang Q. Sublingual Delivery of Insulin: Effects of Enhancers on the Mucosal Lipid Fluidity and Protein Conformation, Transport, and in Vivo Hypoglycemic Activity. Biol Pharm Bull 2005; 28:2279-88. [PMID: 16327166 DOI: 10.1248/bpb.28.2279] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
The purposes of this study were to evaluate effects of enhancers for sublingual delivering insulin on the mucosal lipid fluidity and protein conformation, transport, and in vivo hypoglycemic activity in normal rats. The effects on sublingual mucosa, and aggregation states of insulin were estimated using fluorescence polarization, and circular dichroism method, respectively. The human immortalized oral epithelial cell monolayer was used for evaluating transport of insulin. Hydroxylpropyl-beta-cyclodextrin (HP-beta-CD), chitosan, polyethylene-polypropylene glycol, polyoxyethylene lauryl ether, polysorbate 80, egg lecithin, or oleic acid, was used as a penetration enhancer, respectively. The fluidity of sublingual mucosal lipid was markedly reduced by these enhancers excluding polysorbate 80, and the secondary structure of the mucosal proteins was also influenced by these enhancers. The hexamers of insulin were dissociated to monomers only by chitosan, polyoxyethylene lauryl ether, and egg lecithin. Nonetheless, plasma glucose levels in normal rats were significantly lowered after sublingual administration of insulin with an enhancer compared with those without an enhancer at the same time-point. The enhancing effects may be due to one or multiple factors: increasing the mucosal lipid fluidity, directly loosing the tight junction of epithelia, and dissociating the hexamers of insulin to monomers. Among these, the opened tight junction may correlate most with the enhancing effect in the mucosal permeability. Because the aggregates of insulin exist, the dissociation of the aggregates by an enhancer would benefit the permeability.
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Affiliation(s)
- Chun-Ying Cui
- School of Pharmaceutical Sciences, Peking University, Beijing 100083, China
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Wacher VJ, Wong S, Wong HT. Peppermint oil enhances cyclosporine oral bioavailability in rats: comparison with D-alpha-tocopheryl poly(ethylene glycol 1000) succinate (TPGS) and ketoconazole. J Pharm Sci 2002; 91:77-90. [PMID: 11782899 DOI: 10.1002/jps.10008] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
Peppermint oil inhibits cyclosporine metabolism in vitro. The current work compared the effects of peppermint oil, ketoconazole, and D-alpha-tocopheryl poly(ethylene glycol 1000) succinate (TPGS) on cyclosporine oral bioavailability. Male Sprague-Dawley rats were administered cyclosporine (25 mg/kg) as the Sandimmune formulation. Peppermint oil (100 mg/kg) tripled the mean cyclosporine maximum concentration (C(max)) from 0.60 to 1.6 microg/mL and increased the area under the concentration versus time curve (AUC(0-infinity)) from 8.3 to 24.3 microg x h/mL. The median time to reach C(max) (t(max)) was increased from 2 to 6 h. Terminal half-life (10 h) and mean residence time (MRT; 15 h) were unaffected. Coadministration of TPGS (50 mg/kg) with cyclosporine in a saline vehicle doubled cyclosporine C(max) from 1.3 to 2.9 microg/mL and increased AUC(0-infinity) from 28.5 to 59.7 microg x h/mL. The t(max) was unchanged (3 h). Terminal half-life and MRT were increased by 44% (15.4 versus 10.7 h) and 24% (19.9 versus 16.0 h), respectively. Cyclosporine pharmacokinetics were not altered when corn oil was used instead of saline as a gavage vehicle, however the TPGS effect was abolished. Ketoconazole (10 and 20 mg/kg) had no effect on cyclosporine absorption. The lack of a significant ketoconazole effect may reflect poor metabolism of cyclosporine in rat intestinal tissue and suggests that inhibition of cytochrome P450 3A is not the only means by which peppermint oil enhances cyclosporine oral bioavailability.
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Affiliation(s)
- Vincent J Wacher
- AvMax Inc., 385 Oyster Point Blvd. #9A, South San Francisco, California 94080, USA.
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Xiang J, Fang X, Li X. Transbuccal delivery of 2',3'-dideoxycytidine: in vitro permeation study and histological investigation. Int J Pharm 2002; 231:57-66. [PMID: 11719014 DOI: 10.1016/s0378-5173(01)00865-1] [Citation(s) in RCA: 62] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Permeation of 2',3'-dideoxycytidine (ddC), an ionic compound, through buccal mucosa was investigated in this in vitro study to identify the major permeation barrier within the epithelium of buccal mucosa and explore the feasibility of transbuccal delivery of ddC. In vitro permeation of ddC across porcine buccal mucosa was conducted in isotonic McIlvaine buffer solution (IMB) using in-line flow through diffusion cells at 37 degrees C. Sodium glycodeoxycholate (GDC) was used as the permeation enhancer in the permeation enhancement studies. Light microscopy was used in the histological studies of buccal tissue. The steady-state flux of ddC permeating through buccal mucosa increased linearly (R(2)=0.96, P<0.05) as the donor concentration of ddC was increased from 1 to 20 mg/ml. The permeabilities for the full thickness buccal mucosa, the epithelium, and the connective tissue were determined to be 1.75+/-0.74x10(-7), 2.90+/-1.86x10(-7), and 3.49+/-1.19x10(-6) cm/s, respectively. The permeability of ddC was significantly (P<0.05) enhanced by GDC at a concentration of 4 mM. The histological study revealed that the thickness of epithelium was greatly reduced after buccal tissues were immersed in IMB for 12 and 24 h but the basal lamina remained intact even after 24 h. A bilayer diffusion model was established to quantitatively describe the contributions of the epithelium and the connective tissue to the permeation barrier. In conclusion, ddC permeated through buccal mucosa by passive diffusion over the range of concentrations examined. The basal lamina layer within the epithelium of buccal mucosa acted as an important barrier to the permeation of ddC. GDC effectively enhanced the buccal permeability of ddC. The transbuccal delivery is a potential route for the administration of ddC.
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Affiliation(s)
- Jun Xiang
- Department of Pharmaceutics and Medicinal Chemistry, Thomas J. Long School of Pharmacy and Health Sciences, University of the Pacific, Stockton, CA 95211, USA
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