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Teaima MH, El-Nadi MT, Hamed RR, El-Nabarawi MA, Abdelmonem R. Lyophilized Nasal Inserts of Atomoxetine HCl Solid Lipid Nanoparticles for Brain Targeting as a Treatment of Attention-Deficit/Hyperactivity Disorder (ADHD): A Pharmacokinetics Study on Rats. Pharmaceuticals (Basel) 2023; 16:326. [PMID: 37259468 PMCID: PMC9958713 DOI: 10.3390/ph16020326] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2022] [Revised: 01/29/2023] [Accepted: 01/30/2023] [Indexed: 07/30/2023] Open
Abstract
The study aims to investigate the ability of lyophilized nasal inserts of nanosized atomoxetine HCl solid lipid nanoparticles (ATM-SLNs) to transport atomoxetine (ATM) directly to the brain and overcome the first-pass metabolism. In this case, 16 formulae of (ATM-SLNs) were prepared using hot melt emulsification, stirring and ultrasonication method technique. A full factorial design was established with 24 trials by optimization of four variables; lipid type (Compritol 888 ATO or stearic acid) (X1), lipid to drug ratio [(1:2) or (2:1)] (X2), span 60: Pluronic f127 ratio [(1:3) or (3:1)] (X3) and probe sonication time (five or ten minutes) (X4). The prepared SLNs were characterized for entrapment efficiency (EE%), in-vitro drug release after 30 min (Q30min), particle size (PS), zeta potential (ZP) and polydispersity index (PDI). Design Expert® software was used to select the optimum two formulae. The morphological examination for the optimum two formulae was carried out using a transmission electron microscope (TEM). Furthermore, eight lyophilized nasal inserts were prepared by using a 23 full factorial design by optimization of three variables: type of (ATM-SLNs) formula (X1), type of polymer (NOVEON AA1 or HPMC K100m) (X2) and concentration of polymer (X3). They were evaluated for nasal inserts' physicochemical properties. The two optimum inserts were selected by Design Expert® software. The two optimum insets with the highest desirability values were (S4 and S8). They were subjected to DSC thermal stability study and in-vivo study on rats. They were compared with atomoxetine oral solution, atomoxetine (3 mg/kg, intraperitoneal injection) and the pure atomoxetine solution loaded in lyophilized insert. (ATM-SLNs) showed EE% range of (41.14 mg ± 1.8% to 90.6 mg ± 2.8%), (Q30min%) of (27.11 ± 5.9% to 91.08 ± 0.15%), ZP of (-8.52 ± 0.75 to -28.4 ± 0.212% mV), PS of (320.9 ± 110.81% nm to 936.7 ± 229.6% nm) and PDI of (0.222 ± 0.132% to 0.658 ± 0.03%). Additionally, the two optimum (ATM-SLNs) formulae chosen, i.e., F7 and F9 showed spherical morphology. Nasal inserts had assay of drug content of (82.5 ± 2.5% to 103.94 ± 3.94%), Q15min% of (89.9 ± 6.4% to 100%) and Muco-adhesion strength of (3510.5 ± 140.21 to 9319.5 ± 39.425). DSC results of S4 and S8 showed compatibility of (ATM) with the other excipients. S8 and S4 also showed higher trans-nasal permeation to the brain with brain targeting efficiency of (211.3% and 177.42%, respectively) and drug transport percentages of (52.7% and 43.64%, respectively). To conclude, lyophilized nasal inserts of (ATM-SLNs) enhanced (ATM) trans-nasal drug targeting permeation and brain targeting efficiency.
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Affiliation(s)
- Mahmoud H. Teaima
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo P.O. Box 11562, Egypt
| | - Merhan Taha El-Nadi
- Department of Pharmaceutics, Egyptian Drug Authority (EDA), Giza P.O. Box 12511, Egypt
| | - Raghda Rabe Hamed
- Industrial Pharmacy Department, College of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology, Cairo P.O. Box 12566, Egypt
| | - Mohamed A. El-Nabarawi
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo P.O. Box 11562, Egypt
| | - Rehab Abdelmonem
- Industrial Pharmacy Department, College of Pharmaceutical Sciences and Drug Manufacturing, Misr University for Science and Technology, Cairo P.O. Box 12566, Egypt
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Formulation and evaluation of nasal insert for nose-to-brain drug delivery of rivastigmine tartrate. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103736] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
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Shukr MH, Ismail S, El-Hossary GG, El-Shazly AH. Spanlastics nanovesicular ocular insert as a novel ocular delivery of travoprost: optimization using Box-Behnken design and in vivo evaluation. J Liposome Res 2022; 32:354-364. [PMID: 35037560 DOI: 10.1080/08982104.2022.2025828] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
Abstract
Currently, travoprost is a synthetic prostaglandin F2α analogue used in the treatment of glaucoma, it is delivered by eye drop solution. Due to its very low bioavailability and patient non-compliance, the objective of the current study was to enhance its bioavailability, and prolong its release Spanlastic nano-vesicles gels were designed and optimized using Box-Behnken design. The optimized spanlastic nano-vesicles gel exhibited the lowest particle size (PS), polydispersity index (PDI) and the highest zeta potential (ZP), encapsulation efficiency (EE) and mucoadhesive strength was fabricated into spanlastic nano-vesicles ocular insert by solvent casting. In vivo studies showed enhanced bioavailability of travoprost spanlastic nano-vesicles gel and ocular insert compared to the marketed eye drops (travoswix®), as proven by their higher Cmax and AUC0-∞, in addition to being nonirritant to ocular surfaces. However, spanlastic nano-vesicles ocular insert showed more prolonged effect than spanlastic nano-vesicles gel. According to our study, it can be suggested that travoprost spanlastic nano-vesicles ocular insert is a novel ocular delivery system for glaucoma treatment.
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Affiliation(s)
- Marwa H Shukr
- Department of Pharmaceutics, Egyptian Drug Authority Formerly Known As National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Soha Ismail
- Department of Pharmaceutics, Egyptian Drug Authority Formerly Known As National Organization for Drug Control and Research (NODCAR), Giza, Egypt
| | - Ghada G El-Hossary
- Department of Pharmacology, Research Institute of Ophthalmology, Giza, Egypt
| | - Amany H El-Shazly
- Department of Pharmacology, Research Institute of Ophthalmology, Giza, Egypt
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Abstract
Nasal delivery offers many benefits over traditional approaches to vaccine administration. These include ease of administration without needles that reduces issues associated with needlestick injuries and disposal. Additionally, this route offers easy access to a key part of the immune system that can stimulate other mucosal sites throughout the body. Increased acceptance of nasal vaccine products in both adults and children has led to a burgeoning pipeline of nasal delivery technology. Key challenges and opportunities for the future will include translating in vivo data to clinical outcomes. Particular focus should be brought to designing delivery strategies that take into account the broad range of diseases, populations and healthcare delivery settings that stand to benefit from this unique mucosal route.
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Affiliation(s)
- Helmy Yusuf
- a School of Pharmacy, Queen's University of Belfast , Belfast , Antrim , UK
| | - Vicky Kett
- b School of Pharmacy, Queen's University of Belfast , Belfast , Antrim , UK
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5
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Affiliation(s)
- Nial J. Wheate
- Faculty of Pharmacy, The University of Sydney, Sydney, NSW, Australia
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A new biorelevant dissolution method for orodispersible films. Eur J Pharm Biopharm 2016; 98:20-5. [DOI: 10.1016/j.ejpb.2015.10.012] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2015] [Revised: 10/02/2015] [Accepted: 10/22/2015] [Indexed: 11/22/2022]
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7
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Abdelkader H, Pierscionek B, Alany RG. Novel in situ gelling ocular films for the opioid growth factor-receptor antagonist-naltrexone hydrochloride: fabrication, mechanical properties, mucoadhesion, tolerability and stability studies. Int J Pharm 2014; 477:631-42. [PMID: 25445974 DOI: 10.1016/j.ijpharm.2014.10.069] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2014] [Revised: 10/29/2014] [Accepted: 10/30/2014] [Indexed: 11/16/2022]
Abstract
Naltrexone hydrochloride (NTX) is an innovative drug used in ophthalmology for treatment of ocular surface diseases such as impaired corneal wound healing and severe dry eye. Poor chemical stability has been a major limitation for development of NTX in solution form. The aim of this study was to develop and characterise NTX in situ ocular films for enhanced chemical stability and improved ocular tolerability. The films were prepared from different amorphous polymers and characterised for physicochemical compatibility, moisture-sorption, surface pH, mechanical properties, sterilisability, surface morphology, mucoadhesion, in vitro release, conjunctival irritation and accelerated stability at 40°C/75% relative humidity for 3 months. Glycerin (GLY)-plasticised films exhibited significantly better mechanical properties, compared with polyethylene glycol (PEG) 400 and triethylcitrate (TEC)-plasticised formulations. Superior mucoadhesion was recorded for F7 and F9 plasticised with GLY and PEG 400, respectively. The stability of NTX was significantly enhanced more than 18-times, compared with the solution form. Combination of carboxymethylcellulose sodium (CMC) and sodium alginate (ALG) in a film formulation demonstrated minimal % moisture sorption, good mechanical properties, in vitro release, excellent chemical stability and minimal conjunctival irritation lending them as promising ocular formulations.
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Affiliation(s)
- Hamdy Abdelkader
- Drug Discovery, Delivery and Patient (DDDPC) Theme, School of Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London, UK; Department of Pharmaceutics, Faculty of Pharmacy, Minia University, Mina, Egypt.
| | - Barbara Pierscionek
- Vision Cognition and Neuroscience Theme, Faculty of Science, Engineering and Computing, Kingston University London, Kingston upon Thames, London, UK
| | - Raid G Alany
- Drug Discovery, Delivery and Patient (DDDPC) Theme, School of Pharmacy and Chemistry, Kingston University London, Kingston upon Thames, London, UK; School of Pharmacy, The University of Auckland, Auckland, New Zealand
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8
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Farid RM, Etman MA, Nada AH, Ebian AEAR. Formulation and in vitro evaluation of salbutamol sulphate in situ gelling nasal inserts. AAPS PharmSciTech 2013; 14:712-8. [PMID: 23516112 PMCID: PMC3666017 DOI: 10.1208/s12249-013-9956-y] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2012] [Accepted: 03/05/2013] [Indexed: 11/30/2022] Open
Abstract
The aim of this study was to formulate salbutamol sulfate (SS), a model drug, as mucoadhesive in situ gelling inserts having a high potential as nasal drug delivery system bypassing the first-pass metabolism. In situ gelling inserts, each containing 1.4% SS and 2% gel-forming polymer, hydroxypropyl methylcellulose (HPMC), carboxymethylcellulose sodium (CMC Na), sodium alginate (AL), and chitosan (CH) were prepared. The inserts were investigated for their different physicochemical properties. The weight of inserts was 16-27 mg, drug content was 3.9-4.2 mg, thickness ranged between 15 and 28 μm and surface pH was 5-7. Cumulative drug released from the inserts exhibited extended release for more than 10 h following the decreasing order: CH>AL>CMC Na>HPMC. The drug release from CMC Na and AL inserts followed zero-order kinetics while HPMC and CH inserts exhibited non-Fickian diffusion mechanism. The inserts exhibited different water uptake (7-23%) with the smallest values for CH. Differential scanning calorimetry study pointed out possible interaction of SS and oppositely charged anionic polymers (CMC Na and AL). The mucoadhesive in situ gelling inserts exhibited satisfactory mucoadhesive and extended drug release characteristics. The inserts could be used for nasal delivery of SS over about 12 h; bypassing the hepatic first-pass metabolism without potential irritation.
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Affiliation(s)
- Ragwa M Farid
- Department of Pharmaceutics, Faculty of Pharmacy and Drug Manufacturing, Pharos University, Alexandria, Egypt.
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9
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Abruzzo A, Bigucci F, Cerchiara T, Saladini B, Gallucci M, Cruciani F, Vitali B, Luppi B. Chitosan/alginate complexes for vaginal delivery of chlorhexidine digluconate. Carbohydr Polym 2013; 91:651-8. [DOI: 10.1016/j.carbpol.2012.08.074] [Citation(s) in RCA: 56] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2012] [Accepted: 08/22/2012] [Indexed: 12/26/2022]
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Alfadhel M, Puapermpoonsiri U, Ford SJ, McInnes FJ, van der Walle CF. Lyophilized inserts for nasal administration harboring bacteriophage selective for Staphylococcus aureus: in vitro evaluation. Int J Pharm 2011; 416:280-7. [PMID: 21771648 DOI: 10.1016/j.ijpharm.2011.07.006] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2011] [Revised: 07/01/2011] [Accepted: 07/04/2011] [Indexed: 01/28/2023]
Abstract
Nasal carriage of methicillin-resistant Staphylococcus aureus (MRSA) poses an infection risk and eradication during hospitalization is recommended. Bacteriophage therapy may be effective in this scenario but suitable nasal formulations have yet to be developed. Here we show that lyophilization of bacteriophages in 1ml of a viscous solution of 1-2% (w/v) hydroxypropyl methylcellulose (HPMC) with/without the addition of 1% (w/v) mannitol, contained in Eppendorf tubes, yields nasal inserts composed of a highly porous leaflet-like matrix. Fluorescently labeled bacteriophage were observed to be homogenously distributed throughout the wafers of the dried matrix. The bacteriophage titer fell 10-fold following lyophilization to 10(8)pfu per insert, then falling a further 100- to 1000-fold over 6 to 12months storage at 4°C. This compares well with a total dose of 6×10(5)pfu in 0.2ml liquid applied into the ear during a recent clinical trial in humans. The residual water content of the lyophilized inserts was reduced upon the addition of mannitol to HPMC, but this did not have any correlation to the lytic activity. Mannitol underwent a transition from its amorphous to crystalline state during exposure of the inserts to increasing relative humidities (as would be experienced in the nose), although this transition was suppressed by higher HPMC concentrations and the presence of buffer containing gelatin and bacteriophages. Our results therefore suggest that lyophilized inserts harboring bacteriophage selective for S. aureus may be a novel means for the eradication of MRSA resident in the nose.
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Affiliation(s)
- Munerah Alfadhel
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, UK
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Boateng JS, Matthews KH, Auffret AD, Humphrey MJ, Eccleston GM, Stevens HN. Comparison of thein vitrorelease characteristics of mucosal freeze-dried wafers and solvent-cast films containing an insoluble drug. Drug Dev Ind Pharm 2011; 38:47-54. [DOI: 10.3109/03639045.2011.590496] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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12
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Amorij JP, Hinrichs WL, Frijlink HW, Wilschut JC, Huckriede A. Needle-free influenza vaccination. THE LANCET. INFECTIOUS DISEASES 2010; 10:699-711. [PMID: 20883966 DOI: 10.1016/s1473-3099(10)70157-2] [Citation(s) in RCA: 89] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
Vaccination is the cornerstone of influenza control in epidemic and pandemic situations. Influenza vaccines are typically given by intramuscular injection. However, needle-free vaccinations could offer several distinct advantages over intramuscular injections: they are pain-free, easier to distribute, and easier to give to patients, and their use could reduce vaccination costs. Moreover, vaccine delivery via the respiratory tract, alimentary tract, or skin might elicit mucosal immune responses at the site of virus entry and better cellular immunity, thus improving effectiveness. Although various needle-free vaccination methods for influenza have shown preclinical promise, few have progressed to clinical trials-only live attenuated intranasal vaccines have received approval, and only in some countries. Further clinical investigation is needed to help realise the potential of needle-free vaccination for influenza.
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Affiliation(s)
- Jean-Pierre Amorij
- Department of Pharmaceutical Technology and Biopharmacy, University of Gröningen, Netherlands
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13
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Luppi B, Bigucci F, Cerchiara T, Zecchi V. Chitosan-based hydrogels for nasal drug delivery: from inserts to nanoparticles. Expert Opin Drug Deliv 2010; 7:811-28. [DOI: 10.1517/17425247.2010.495981] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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14
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McInnes F, Baillie AJ, Stevens HNE. The use of simple dynamic mucosal models and confocal microscopy for the evaluation of lyophilised nasal formulations. J Pharm Pharmacol 2010; 59:759-67. [PMID: 17637168 DOI: 10.1211/jpp.59.6.0002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
A range of methods is reported in the literature for assessing hydration and adhesion parameters in the performance of nasal bioadhesive formulations; however, these tests do not always represent the dynamic conditions in the nasal cavity. Lyophilised formulations intended for nasal administration were evaluated using in-vitro tests designed in an attempt to mimic relevant processes in the nasal cavity, and intended to discriminate between different formulations. Initial investigative studies using scanning electron microscopy revealed that the lyophilisate had a highly porous internal structure, expected to provide an ideal porous pathway for re-hydration. Vapour sorption analysis demonstrated substantial weight gain of the lyophilisates on exposure to 95% relative humidity, ranging from 38% to 66%. Agar was used as a synthetic mucosal model designed to provide a standardised quantity of water available for rehydration of the formulations in in-vitro tests. A dynamic adhesion test and a texture analyser sliding test were designed to quantify different aspects of the spreading and adhesion of the hydrating formulations on the synthetic mucosal surface. Examination of the lyophilised formulations using confocal microscopy allowed visualisation and quantification of the initial rate of water ingress into the lyophilisates, which was found to consist of an initial rapid phase, followed by a slower steady-state phase. The results demonstrated that the use of a combination of methods representing the dynamic conditions of the nasal cavity is advisable in order to evaluate a formulation fully and to avoid misleading conclusions.
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Affiliation(s)
- Fiona McInnes
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 27 Taylor Street, Glasgow G4 0NR, UK.
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15
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Luppi B, Bigucci F, Mercolini L, Musenga A, Sorrenti M, Catenacci L, Zecchi V. Novel mucoadhesive nasal inserts based on chitosan/hyaluronate polyelectrolyte complexes for peptide and protein delivery. J Pharm Pharmacol 2010. [DOI: 10.1211/jpp.61.02.0003] [Citation(s) in RCA: 38] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
Abstract
Objectives
The purpose of this study was the preparation and characterisation of mucoadhesive nasal inserts based on chitosan/hyaluronate polyelectrolyte complexes prepared at various pHs and at different molar ratios.
Methods
A suspension of chitosan/hyaluronate complexes with or without the model drugs (vancomycin or insulin) was lyophilised into small inserts. Complexation yield, FT-IR spectra and thermogravimetric analysis were used to study the degree of interactive strength between polyions. In-vitro swelling, mucoadhesion and release tests were performed in order to investigate delivery of vancomycin and insulin in the nasal cavity.
Key findings
The results indicated that the selection of complex preparative conditions allows modulation of insert swelling and mucoadhesion ability. Nasal inserts containing vancomycin or insulin had showed completely different drug release behaviour.
Conclusions
Chitosan/hyaluronate polyelectrolyte complexes can be used for the formulation of mucoadhesive nasal inserts for the delivery of peptide and protein drugs.
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Affiliation(s)
- Barbara Luppi
- Department of Pharmaceutical Sciences, Bologna University, Italy
| | - Federica Bigucci
- Department of Pharmaceutical Sciences, Bologna University, Italy
| | - Laura Mercolini
- Department of Pharmaceutical Sciences, Bologna University, Italy
| | | | - Milena Sorrenti
- Department of Pharmaceutical Chemistry, Pavia University, Italy
| | - Laura Catenacci
- Department of Pharmaceutical Chemistry, Pavia University, Italy
| | - Vittorio Zecchi
- Department of Pharmaceutical Sciences, Bologna University, Italy
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16
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Boateng JS, Matthews KH, Auffret AD, Humphrey MJ, Stevens HN, Eccleston GM. In vitro drug release studies of polymeric freeze-dried wafers and solvent-cast films using paracetamol as a model soluble drug. Int J Pharm 2009; 378:66-72. [PMID: 19477255 DOI: 10.1016/j.ijpharm.2009.05.038] [Citation(s) in RCA: 54] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2009] [Revised: 05/09/2009] [Accepted: 05/19/2009] [Indexed: 11/16/2022]
Affiliation(s)
- Joshua S Boateng
- Department of Pharmaceutical Sciences, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, John Arbuthnott Building, 27 Taylor Street, Glasgow G4 0NR, UK.
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17
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Alginate-magnesium aluminum silicate films for buccal delivery of nicotine. Colloids Surf B Biointerfaces 2009; 74:103-13. [PMID: 19643587 DOI: 10.1016/j.colsurfb.2009.06.033] [Citation(s) in RCA: 53] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2009] [Revised: 06/21/2009] [Accepted: 06/29/2009] [Indexed: 11/23/2022]
Abstract
Sodium alginate-magnesium aluminum silicate (SA-MAS) dispersions with nicotine (NCT) were prepared at different pHs and characterized for the particle size and zeta potential, NCT adsorbed by MAS, and flow behavior before film casting. The physicochemical properties, NCT content, in vitro bioadhesive property, and NCT release and permeation of the NCT-loaded SA-MAS films were investigated. This study showed that incorporation of NCT into the SA-MAS dispersions caused a change in particle size and flow behavior and that NCT could be adsorbed by MAS. The formation of protonated NCT at acidic and neutral pHs could interact with negatively charged MAS via an electrostatic force, resulting in the formation of NCT-MAS flocculates/complexes that could act as microreservoirs in the films. The NCT-loaded SA-MAS films prepared at pH 5 yielded the highest NCT content due to non-significant loss of NCT during drying. Moreover, pH of the preparation also affected the crystallinity and thermal properties of the films. The NCT release and permeation across the mucosal membrane of the films could be described using a matrix diffusion controlled mechanism. In addition, the NCT-loaded SA-MAS films also possessed a bioadhesive property for adhesion to the mucosal membrane. This finding suggests that the NCT-loaded SA-MAS films composed of numerous NCT-MAS complexes as microreservoirs demonstrated a strong potential for use as a buccal delivery system.
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Formulation, stability and thermal analysis of lyophilised wound healing wafers containing an insoluble MMP-3 inhibitor and a non-ionic surfactant. Int J Pharm 2008; 356:110-20. [DOI: 10.1016/j.ijpharm.2007.12.043] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2007] [Accepted: 12/31/2007] [Indexed: 11/24/2022]
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McInnes FJ, O'Mahony B, Lindsay B, Band J, Wilson CG, Hodges LA, Stevens HNE. Nasal residence of insulin containing lyophilised nasal insert formulations, using gamma scintigraphy. Eur J Pharm Sci 2007; 31:25-31. [PMID: 17368006 DOI: 10.1016/j.ejps.2007.02.002] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2006] [Revised: 01/26/2007] [Accepted: 02/05/2007] [Indexed: 10/23/2022]
Abstract
Bioadhesive dosage forms are a potential method for overcoming rapid mucociliary transport in the nose. A lyophilised nasal insert formulation previously investigated in sheep demonstrated prolonged absorption of nicotine hydrogen tartrate suggestive of extended nasal residence, and increased bioavailability. The current study was performed to quantify nasal residence of the formulations using gamma scintigraphy, and to investigate the absorption of a larger molecule, namely insulin. A four-way crossover study was conducted in six healthy male volunteers, comparing a conventional nasal spray solution with three lyophilised nasal insert formulations (1-3% hydroxypropylmethylcellulose (HPMC)). The conventional nasal spray deposited in the posterior nasal cavity in only one instance, with a rapid clearance half-life of 9.2 min. The nasal insert formulations did not enhance nasal absorption of insulin, however an extended nasal residence time of 4-5 h was observed for the 2% HPMC formulation. The 1% HPMC insert initially showed good spreading behaviour; however, clearance was faster than for the 2% formulation. The 3% HPMC nasal insert showed no spreading, and was usually cleared intact from the nasal cavity within 90 min. In conclusion, the 2% HPMC lyophilised insert formulation achieved extended nasal residence, demonstrating an optimum combination of rapid adhesion without over hydration.
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Affiliation(s)
- Fiona J McInnes
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, 27 Taylor Street, Glasgow G4 0NR, UK.
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