1
|
Müller-Lierheim WGK. Why Chain Length of Hyaluronan in Eye Drops Matters. Diagnostics (Basel) 2020; 10:E511. [PMID: 32717869 PMCID: PMC7459843 DOI: 10.3390/diagnostics10080511] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2020] [Revised: 07/11/2020] [Accepted: 07/20/2020] [Indexed: 02/06/2023] Open
Abstract
The chain length of hyaluronan (HA) determines its physical as well as its physiological properties. Results of clinical research on HA eye drops are not comparable without this parameter. In this article methods for the assessment of the average molecular weight of HA in eye drops and a terminology for molecular weight ranges are proposed. The classification of HA eye drops according to their zero shear viscosity and viscosity at 1000 s-1 shear rate is presented. Based on the gradient of mucin MUC5AC concentration within the mucoaqueous layer of the tear film a hypothesis on the consequences of this gradient on the rheological properties of the tear film is provided. The mucoadhesive properties of HA and their dependence on chain length are explained. The ability of HA to bind to receptors on the ocular epithelial cells, and in particular the potential consequences of the interaction between HA and the receptor HARE, responsible for HA endocytosis by corneal epithelial cells is discussed. The physiological function of HA in the framework of ocular surface homeostasis and wound healing are outlined, and the influence of the chain length of HA on the clinical performance of HA eye drops is illustrated. The use of very high molecular weight HA (hylan A) eye drops as drug vehicle for the next generation of ophthalmic drugs with minimized side effects is proposed and its advantages elucidated. Consequences of the diagnosis and treatment of ocular surface disease are discussed.
Collapse
|
2
|
Kolonko AK, Bangel-Ruland N, Goycoolea FM, Weber WM. Chitosan Nanocomplexes for the Delivery of ENaC Antisense Oligonucleotides to Airway Epithelial Cells. Biomolecules 2020; 10:biom10040553. [PMID: 32260534 PMCID: PMC7226018 DOI: 10.3390/biom10040553] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 03/31/2020] [Accepted: 04/04/2020] [Indexed: 12/11/2022] Open
Abstract
Nanoscale drug delivery systems exhibit a broad range of applications and promising treatment possibilities for various medical conditions. Nanomedicine is of great interest, particularly for rare diseases still lacking a curative treatment such as cystic fibrosis (CF). CF is defined by a lack of Cl− secretion through the cystic fibrosis transmembrane conductance regulator (CFTR) and an increased Na+ absorption mediated by the epithelial sodium channel (ENaC). The imbalanced ion and water transport leads to pathological changes in many organs, particularly in the lung. We developed a non-viral delivery system based on the natural aminopolysaccharide chitosan (CS) for the transport of antisense oligonucleotides (ASO) against ENaC to specifically address Na+ hyperabsorption. CS–ASO electrostatic self-assembled nanocomplexes were formed at varying positive/negative (P/N) charge ratios and characterized for their physicochemical properties. Most promising nanocomplexes (P/N 90) displayed an average size of ~150 nm and a zeta potential of ~+30 mV. Successful uptake of the nanocomplexes by the human airway epithelial cell line NCI-H441 was confirmed by fluorescence microscopy. Functional Ussing chamber measurements of transfected NCI-H441 cells showed significantly decreased Na+ currents, indicating successful downregulation of ENaC. The results obtained confirm the promising characteristics of CS as a non-viral and non-toxic delivery system and demonstrate the encouraging possibility to target ENaC with ASOs to treat abnormal ion transport in CF.
Collapse
Affiliation(s)
- A. Katharina Kolonko
- Institute of Animal Physiology, University of Muenster, Schlossplatz 8, 48143 Muenster, Germany; (N.B.-R.); (W.-M.W.)
- Correspondence: ; Tel.: +49-251-832-1784
| | - Nadine Bangel-Ruland
- Institute of Animal Physiology, University of Muenster, Schlossplatz 8, 48143 Muenster, Germany; (N.B.-R.); (W.-M.W.)
| | | | - Wolf-Michael Weber
- Institute of Animal Physiology, University of Muenster, Schlossplatz 8, 48143 Muenster, Germany; (N.B.-R.); (W.-M.W.)
| |
Collapse
|
3
|
Komati S, Swain S, Rao MEB, Jena BR, Dasi V. Mucoadhesive Multiparticulate Drug Delivery Systems: An Extensive Review of Patents. Adv Pharm Bull 2019; 9:521-538. [PMID: 31857957 PMCID: PMC6912179 DOI: 10.15171/apb.2019.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 06/18/2019] [Accepted: 06/24/2019] [Indexed: 11/09/2022] Open
Abstract
Innovations in pharmaceutical research are striving for designing newer drug therapies to eradicate deadly diseases. Strategies for such inventions always flourish with keys and objectives of minimal adverse effects and effective treatment. Recent trends in pharmaceutical technology specify that mucoadhesive drug delivery system is particularly appropriate than oral control release, for getting local systematic delivery of drugs in GIT for an extended interval of time at a predetermined rate. However, it is somehow expensive and unpleasant sensation for some patients, but still it is needful for getting short enzymatic activity, simple administration without pain and evasion of fast pass metabolism. Usually the vehicles employed in drug delivery of mucoadhesive system have a significant impact that draws further attention to potential benefits like improved bioavailability of therapeutic agents, extensive drug residence time at the site of administration and a comparatively faster drug uptake into the systemic circulation. The drug release from mucoadhesive multiparticulates is contingent on several types of factors comprising carrier need to produce the multiparticles and quantity of medication drug contained in them. Mucoadhesion is characterized by selected theories and mechanisms. Various strategies emergent in mucoadhesive multiparticulate drug delivery system (MMDDS) by in-vitro as well as ex-vivo description and characterization are also critically discussed. Apart from these, the primary focus during this review is to highlight current patents, clinical status, and regulatory policy for enhancement of mucoadhesive multi-particulate drug delivery system in the present scenario.
Collapse
Affiliation(s)
- Someshwar Komati
- Department of Pharmaceutics, University College of Pharmaceutical Sciences, Palamuru University, Mahaboobnagar, Telangana-509001, India
| | - Suryakanta Swain
- Southern Institute of Medical Sciences, College of Pharmacy, Mangaldas Nagar, Vijyawada Road, Guntur-522 001, Andhra Pradesh, India
| | - Muddana Eswara Bhanoji Rao
- Department of Pharmaceutics, Roland Institute of Pharmaceutical Sciences, Khodasinghi, Berhampur-760 010, Ganjam, Odisha, India
| | - Bikash Ranjan Jena
- Southern Institute of Medical Sciences, College of Pharmacy, Mangaldas Nagar, Vijyawada Road, Guntur-522 001, Andhra Pradesh, India
| | - Vishali Dasi
- Department of Pharmaceutics, University College of Pharmaceutical Sciences, Palamuru University, Mahaboobnagar, Telangana-509001, India
| |
Collapse
|
4
|
Sohail M, Mudassir, Minhas MU, Khan S, Hussain Z, de Matas M, Shah SA, Khan S, Kousar M, Ullah K. Natural and synthetic polymer-based smart biomaterials for management of ulcerative colitis: a review of recent developments and future prospects. Drug Deliv Transl Res 2019; 9:595-614. [PMID: 29611113 DOI: 10.1007/s13346-018-0512-x] [Citation(s) in RCA: 43] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Ulcerative colitis (UC) is an inflammatory disease of the colon that severely affects the quality of life of patients and usually responds well to anti-inflammatory agents for symptomatic relief; however, many patients need colectomy, a surgical procedure to remove whole or part of the colon. Though various types of pharmacological agents have been employed for the management of UC, the lack of effectiveness is usually predisposed to various reasons including lack of target-specific delivery of drugs and insufficient drug accumulation at the target site. To overcome these glitches, many researchers have designed and characterized various types of versatile polymeric biomaterials to achieve target-specific delivery of drugs via oral route to optimize their targeting efficiency to the colon, to improve drug accumulation at the target site, as well as to ameliorate off-target effects of chemotherapy. Therefore, the aim of this review was to summarize and critically discuss the pharmaceutical significance and therapeutic feasibility of a wide range of natural and synthetic biomaterials for efficient drug targeting to colon and rationalized treatment of UC. Among various types of biomaterials, natural and synthetic polymer-based hydrogels have shown promising targeting potential due to their innate pH responsiveness, sustained and controlled release characteristics, and microbial degradation in the colon to release the encapsulated drug moieties. These characteristic features make natural and synthetic polymer-based hydrogels superior to conventional pharmacological strategies for the management of UC.
Collapse
Affiliation(s)
- Muhammad Sohail
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan.
| | - Mudassir
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Muhammad Usman Minhas
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur, Bahawalpur, Punjab, 63100, Pakistan
| | - Shahzeb Khan
- Department of Pharmacy, University of Malakand, Lower Dir, KPK, Pakistan
| | - Zahid Hussain
- Department of Pharmaceutics, Faculty of Pharmacy, Universiti Teknologi MARA (UiTM), Puncak Alam Campus, 42300, Bandar Puncak Alam, Selangor, Malaysia
| | - Marcel de Matas
- SEDA Pharmaceutical Development Services, The BioHub at Alderley Park, Cheshire, UK
| | - Syed Ahmed Shah
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Samiullah Khan
- Faculty of Pharmacy and Alternative Medicine, The Islamia University of Bahawalpur, Bahawalpur, Punjab, 63100, Pakistan
| | - Mubeen Kousar
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| | - Kaleem Ullah
- Department of Pharmacy, COMSATS Institute of Information Technology, Abbottabad, 22060, Pakistan
| |
Collapse
|
5
|
Huang TW, Li ST, Young TH. Chitosan-hyaluronan: promotion of mucociliary differentiation of respiratory epithelial cells and development of olfactory receptor neurons. ARTIFICIAL CELLS NANOMEDICINE AND BIOTECHNOLOGY 2019; 47:564-570. [PMID: 30857434 DOI: 10.1080/21691401.2019.1579732] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Developing a biomaterial that promotes regeneration of both respiratory epithelium (RE) and olfactory neuroepithelium (ON) improves the surgical outcome of endoscopic sinus surgery. Although chitosan (CS) inhibits mucociliary differentiation of RE, it has been reported to regenerate ON. In addition, hyaluronic acid (HA) has been demonstrated to promote regeneration of RE. Whether the composite CS + HA would simultaneously benefit RE and ON remains unexplored. Human nasal respiratory epithelial cells (RECs) and olfactory neuroepithelial cells (ONCs) are respectively obtained from the RE and the ON. They are cultured in vitro and divided into groups undergoing four treatments, control, CS, HA, and CS + HA and assessed by scanning electron microscope, immunocytochemistry, and Western blots following indicated growth conditions. RECs keep polygonal morphology with mucociliary differentiation in the CS + HA group. The levels of E-cadherin, zonula occludens-1, mucin 5AC, and forkhead box protein J1 are significantly higher in the CS + HA group than in the CS alone group. In addition, ONCs express lower cytokeratin 18 (CK18) and higher olfactory marker protein (OMP) in the CS + HA group than in HA alone group. ONCs express more signal transduction apparatuses, adenylate cyclase 3, in CS and CS + HA groups than in HA and controls. Chitosan-hyaluronan plays a part in promoting differentiation of ORNs and facilitating mucociliary differentiation of RECs. This composite is a promising biomaterial for the sinonasal application.
Collapse
Affiliation(s)
- Tsung-Wei Huang
- a Department of Electrical Engineering, College of Electrical and Communication Engineering , Yuan Ze University , Taoyuan , Taiwan.,b Department of Otolaryngology , Far Eastern Memorial Hospital , Taipei , Taiwan.,c Department of Health Care Administration , Oriental Institute of Technology , Taipei , Taiwan
| | - Sheng-Tien Li
- d Institute of Biomedical Engineering, College of Medicine and College of Engineering , National Taiwan University , Taipei , Taiwan
| | - Tai-Horng Young
- d Institute of Biomedical Engineering, College of Medicine and College of Engineering , National Taiwan University , Taipei , Taiwan
| |
Collapse
|
6
|
Borodina T, Marchenko I, Trushina D, Volkova Y, Shirinian V, Zavarzin I, Kondrakhin E, Kovalev G, Kovalchuk M, Bukreeva T. A novel formulation of zolpidem for direct nose-to-brain delivery: synthesis, encapsulation and intranasal administration to mice. ACTA ACUST UNITED AC 2018; 70:1164-1173. [PMID: 29956328 DOI: 10.1111/jphp.12958] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2017] [Accepted: 06/03/2018] [Indexed: 11/29/2022]
Abstract
OBJECTIVES Anxiolytic drug zolpidem was incorporated into the microcontainers based on mesoporous calcium carbonate particles modified by diethylaminoethyl-dextran/hyaluronic acid shell. The release of zolpidem in saline solution and in polymer film modelling nasal mucosa was investigated. The anxiolytic effect of zolpidem upon intranasal administration of microcontainers and free medicine was determined by in vivo experiments on mice. METHODS The structures of all compounds during zolpidem synthesis were established using nuclear magnetic resonance spectroscopy. The loading efficacy and release kinetics of zolpidem were analysed by spectrophotometry. Surface morphology of formulation was investigated by scanning electron microscopy. To determine the effect of zolpidem-loaded containers administration by the intranasal route in vivo experiments was carried out applying the open field test. KEY FINDINGS Nasal administration of zolpidem in the form of the microcontainers based on mesoporous calcium carbonate particles modified by diethylaminoethyl-dextran/hyaluronic acid shell has a pronounced anxiolytic effect on the behaviour of the animals in the open field test. CONCLUSIONS The polyelectrolyte shell deposited together with zolpidem enhances the loading efficacy of the microcontainers. In vivo experiments on mice demonstrate increase in anxiolytic effect of zolpidem in microcontainers compared with upon intranasal administration of free medicine.
Collapse
Affiliation(s)
- Tatiana Borodina
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.,Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia
| | - Irina Marchenko
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.,National Research Centre "Kurchatov Institute", Moscow, Russia
| | - Daria Trushina
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.,Institute of Molecular Medicine, Sechenov First Moscow State Medical University, Moscow, Russia.,National Research Centre "Kurchatov Institute", Moscow, Russia
| | - Yulia Volkova
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Valerii Shirinian
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | - Igor Zavarzin
- N.D. Zelinsky Institute of Organic Chemistry, Russian Academy of Sciences, Moscow, Russia
| | | | | | - Mikhail Kovalchuk
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.,National Research Centre "Kurchatov Institute", Moscow, Russia
| | - Tatiana Bukreeva
- Shubnikov Institute of Crystallography of Federal Scientific Research Centre "Crystallography and Photonics" of Russian Academy of Sciences, Moscow, Russia.,National Research Centre "Kurchatov Institute", Moscow, Russia
| |
Collapse
|
7
|
Xie J, Li A, Li J. Advances in pH-Sensitive Polymers for Smart Insulin Delivery. Macromol Rapid Commun 2017; 38. [DOI: 10.1002/marc.201700413] [Citation(s) in RCA: 56] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2017] [Revised: 08/08/2017] [Indexed: 12/13/2022]
Affiliation(s)
- Jing Xie
- College of Polymer Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Anqi Li
- College of Polymer Science and Engineering; Sichuan University; Chengdu 610065 China
| | - Jianshu Li
- College of Polymer Science and Engineering; Sichuan University; Chengdu 610065 China
- State Key Laboratory of Polymer Materials Engineering; Sichuan University; Chengdu 610065 China
| |
Collapse
|
8
|
Mehta P. Dry Powder Inhalers: A Focus on Advancements in Novel Drug Delivery Systems. JOURNAL OF DRUG DELIVERY 2016; 2016:8290963. [PMID: 27867663 PMCID: PMC5102732 DOI: 10.1155/2016/8290963] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 09/25/2016] [Accepted: 10/09/2016] [Indexed: 12/20/2022]
Abstract
Administration of drug molecules by inhalation route for treatment of respiratory diseases has the ability to deliver drugs, hormones, nucleic acids, steroids, proteins, and peptides, particularly to the site of action, improving the efficacy of the treatment and consequently lessening adverse effects of the treatment. Numerous inhalation delivery systems have been developed and studied to treat respiratory diseases such as asthma, COPD, and other pulmonary infections. The progress of disciplines such as biomaterials science, nanotechnology, particle engineering, molecular biology, and cell biology permits further improvement of the treatment capability. The present review analyzes modern therapeutic approaches of inhaled drugs with special emphasis on novel drug delivery system for treatment of various respiratory diseases.
Collapse
Affiliation(s)
- Piyush Mehta
- Dry Powder Inhaler Lab, Respiratory Formulations, Cipla R & D, LBS Road, Vikhroli (W), Mumbai, Maharashtra 400079, India
| |
Collapse
|
9
|
Al-Qadi S, Alatorre-Meda M, Martin-Pastor M, Taboada P, Remuñán-López C. The role of hyaluronic acid inclusion on the energetics of encapsulation and release of a protein molecule from chitosan-based nanoparticles. Colloids Surf B Biointerfaces 2016; 141:223-232. [DOI: 10.1016/j.colsurfb.2016.01.029] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/16/2015] [Revised: 01/15/2016] [Accepted: 01/17/2016] [Indexed: 10/22/2022]
|
10
|
Abdel Mouez M, Zaki NM, Mansour S, Geneidi AS. Bioavailability enhancement of verapamil HCl via intranasal chitosan microspheres. Eur J Pharm Sci 2013; 51:59-66. [PMID: 23999035 DOI: 10.1016/j.ejps.2013.08.029] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2013] [Revised: 08/19/2013] [Accepted: 08/20/2013] [Indexed: 12/28/2022]
Abstract
Chitosan microspheres are potential drug carriers for maximizing nasal residence time, circumventing rapid mucociliary clearance and enhancing nasal absorption. The aim of the present study was to develop and characterize chitosan mucoadhesive microspheres of verapamil hydrochloride (VRP) for intranasal delivery as an alternative to oral VRP which suffers low bioavailability (20%) due to extensive first pass effect. The microspheres were produced using a spray-drying and precipitation techniques and characterized for morphology (scanning electron microscopy), particle size (laser diffraction method), drug entrapment efficiency, thermal behavior (differential scanning calorimetry) and crystallinity (X-ray diffractometric studies) as well as in vitro drug release. Bioavailability of nasal VRP microspheres was studied in rabbits and the results were compared to those obtained after nasal, oral and intravenous administration of VRP solution. Results demonstrated that the microspheres were spherical with size 21-53 μm suitable for nasal deposition. The spray-drying technique was superior over precipitation technique in providing higher VRP entrapment efficiency and smaller burst release followed by a more sustained one over 6h. The bioavailability study demonstrated that the nasal microspheres exhibited a significantly higher bioavailability (58.6%) than nasal solution of VRP (47.8%) and oral VRP solution (13%). In conclusion, the chitosan-based nasal VRP microspheres are promising for enhancing VRP bioavailability by increasing the nasal residence time and avoiding the first-pass metabolism of the drug substance.
Collapse
Affiliation(s)
- Mamdouh Abdel Mouez
- Department of Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Ain Shams University, Abbassia, Cairo, Egypt; Department of Pharmaceutics, College of Pharmacy, Future University, El-Tagamoa El-Khames, Cairo, Egypt
| | | | | | | |
Collapse
|
11
|
Pulmonary disposition of vancomycin nebulized as lipid vesicles in rats. J Antibiot (Tokyo) 2013; 66:447-51. [DOI: 10.1038/ja.2013.32] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2013] [Accepted: 03/05/2013] [Indexed: 12/17/2022]
|
12
|
Grainger CI, Saunders M, Buttini F, Telford R, Merolla LL, Martin GP, Jones SA, Forbes B. Critical Characteristics for Corticosteroid Solution Metered Dose Inhaler Bioequivalence. Mol Pharm 2012; 9:563-9. [DOI: 10.1021/mp200415g] [Citation(s) in RCA: 40] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- C. I. Grainger
- Institute of Pharmaceutical Science, King’s College London, 150 Stamford Street,
London, SE1 9NH, U.K
| | - M. Saunders
- Kuecept Ltd, 16/17 Station Close, Potters Bar, Hertfordshire,
EN7 1TL, U.K
| | - F. Buttini
- Department
of Pharmacy, University of Parma, Parma,
Italy
| | - R. Telford
- Analytical Centre, University of Bradford, BD7 1DP, U.K
| | - L. L. Merolla
- Safety and Environmental Assurance Centre, Unilever Colworth, Sharnbrook, MK44 1LQ, U.K
| | - G. P. Martin
- Institute of Pharmaceutical Science, King’s College London, 150 Stamford Street,
London, SE1 9NH, U.K
| | - S. A. Jones
- Institute of Pharmaceutical Science, King’s College London, 150 Stamford Street,
London, SE1 9NH, U.K
| | - B. Forbes
- Institute of Pharmaceutical Science, King’s College London, 150 Stamford Street,
London, SE1 9NH, U.K
| |
Collapse
|
13
|
Heris HK, Rahmat M, Mongeau L. Characterization of a hierarchical network of hyaluronic acid/gelatin composite for use as a smart injectable biomaterial. Macromol Biosci 2012; 12:202-10. [PMID: 22147507 PMCID: PMC4490586 DOI: 10.1002/mabi.201100335] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2011] [Indexed: 11/09/2022]
Abstract
Hybrid HA/Ge hydrogel particles are embedded in a secondary HA network to improve their structural integrity. The internal microstructure of the particles is imaged through TEM. CSLM is used to identify the location of the Ge molecules in the microgels. Through indentation tests, the Young's modulus of the individual particles is found to be 22 ± 2.5 kPa. The overall shear modulus of the composite is 75 ± 15 Pa at 1 Hz. The mechanical properties of the substrate are found to be viable for cell adhesion. The particles' diameter at pH = 8 is twice that at pH = 5. The pH sensitivity is found to be appropriate for smart drug delivery. Based on their mechanical and structural properties, HA-Ge hierarchical materials may be well suited for use as injectable biomaterials for tissue reconstruction.
Collapse
Affiliation(s)
- Hossein K. Heris
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke St. West, Montreal, QC H3A 2K6, Canada
| | - Meysam Rahmat
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke St. West, Montreal, QC H3A 2K6, Canada
| | - Luc Mongeau
- Department of Mechanical Engineering, McGill University, 817 Sherbrooke St. West, Montreal, QC H3A 2K6, Canada
| |
Collapse
|
14
|
Cao F, Ding B, Sun M, Guo C, Zhang L, Zhai G. Lung-targeted delivery system of curcumin loaded gelatin microspheres. Drug Deliv 2011; 18:545-54. [PMID: 21812751 DOI: 10.3109/10717544.2011.595842] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
The purpose of the study is to design and evaluate curcumin loaded gelatin microspheres (C-GMS) for effective drug delivery to the lung. C-GMS was prepared by the emulsification-linkage technique and the formulation was optimized by orthogonal design. The mean encapsulation efficiency and drug loading of the optimal C-GMS were 75.5 ± 3.82 % and 6.15 ± 0.44%, respectively. The C-GMS presented a spherical shape and smooth surface with a mean particle diameter of 18.9 μm. The in vitro drug release behavior of C-GMS followed the first-order kinetics. The tissue distribution showed that the drug concentrations at lung tissue for the C-GMS suspension were significantly higher than those for the curcumin solution, and the Ce for lung was 36.19. Histopathological studies proved C-GMS was efficient and safe to be used as a passive targeted drug delivery system to the lung. Hence, C-GMS has a great potential for the targeted delivery of curcumin to the lung.
Collapse
Affiliation(s)
- Fengliang Cao
- Department of Pharmacy, Shandong University Hospital, Jinan 250012, China
| | | | | | | | | | | |
Collapse
|
15
|
Jiang L, Gao L, Wang X, Tang L, Ma J. The application of mucoadhesive polymers in nasal drug delivery. Drug Dev Ind Pharm 2010. [DOI: 10.3109/03639040903170750] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
|
16
|
Amidi M, Mastrobattista E, Jiskoot W, Hennink WE. Chitosan-based delivery systems for protein therapeutics and antigens. Adv Drug Deliv Rev 2010; 62:59-82. [PMID: 19925837 DOI: 10.1016/j.addr.2009.11.009] [Citation(s) in RCA: 403] [Impact Index Per Article: 28.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2009] [Revised: 10/16/2009] [Accepted: 11/04/2009] [Indexed: 11/28/2022]
Abstract
Therapeutic peptides/proteins and protein-based antigens are chemically and structurally labile compounds, which are almost exclusively administered by parenteral injections. Recently, non-invasive mucosal routes have attracted interest for administration of these biotherapeutics. Chitosan-based delivery systems enhance the absorption and/or cellular uptake of peptides/proteins across mucosal sites and have immunoadjuvant properties. Chitosan is a mucoadhesive polysaccharide capable of opening the tight junctions between epithelial cells and it has functional groups for chemical modifications, which has resulted in a large variety of chitosan derivatives with tunable properties for the aimed applications. This review provides an overview of chitosan-based polymers for preparation of both therapeutic peptides/protein and antigen formulations. The physicochemical properties of these carrier systems as well as their applications in protein and antigen delivery through parenteral and mucosal (particularly nasal and pulmonary) administrations are summarized and discussed.
Collapse
Affiliation(s)
- Maryam Amidi
- Department of Pharmaceutics, Utrecht Institute for Pharmaceutical Sciences (UIPS), Utrecht University, P.O. Box 80082, 3508 TB Utrecht, The Netherlands.
| | | | | | | |
Collapse
|
17
|
Abstract
Topical drug delivery for sinonasal disorders is influenced by a variety of factors. Macroscopically (or anatomically), the ability of the drug to reach the appropriate region of the paranasal system is paramount. Delivery techniques, surgical state of the sinus cavity, delivery device, and fluid dynamics (volume, pressure, position) have a significant impact on the delivery of topical therapies to the sinus mucosa. Once topical therapeutics actually reach the desired site, factors within the local microenvironment heavily influence local drug delivery. The presence and composition of the mucus blanket, mucociliary clearance, direct mucin-drug binding, and the permeability of pharmaceutical compounds will all impact drug delivery. In addition, the general therapeutic goal of topical management may lie between the potentially competing actions of mechanical lavage and pharmaceutical intervention. Techniques for the mechanical removal of mucus, antigen, and inflammatory products may not be the most efficient approach for pharmaceutical delivery. This article reviews the evolving concepts in local drug therapy, both for the factors that influence anatomic distribution within the sinonasal system and those that affect mucosal absorption.
Collapse
Affiliation(s)
- Richard J Harvey
- Rhinology and Skull Base Surgery, Department of Otolaryngology/Skull Base Surgery, St Vincent's Hospital, 354 Victoria Street, Darlinghurst, Sydney, NSW 2010, Australia.
| | | |
Collapse
|
18
|
Tang Y, Singh J. Thermosensitive Drug Delivery System of Salmon Calcitonin: In Vitro Release, In Vivo Absorption, Bioactivity and Therapeutic Efficacies. Pharm Res 2009; 27:272-84. [DOI: 10.1007/s11095-009-0015-z] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2009] [Accepted: 11/17/2009] [Indexed: 10/20/2022]
|
19
|
Kang ML, Cho CS, Yoo HS. Application of chitosan microspheres for nasal delivery of vaccines. Biotechnol Adv 2009; 27:857-865. [DOI: 10.1016/j.biotechadv.2009.06.007] [Citation(s) in RCA: 93] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2009] [Revised: 06/24/2009] [Accepted: 06/27/2009] [Indexed: 12/01/2022]
|
20
|
Abstract
Chitosan is a partially deacetylated polymer obtained from the alkaline deacetylation of chitin, which is a glucose-based, unbranched polysaccharide that occurs widely in nature as the principal component of exoskeletons of crustaceans and insects, as well as of the cell walls of some bacteria and fungi. Chitosan exhibits a variety of physicochemical and biological properties resulting in numerous applications in fields such as waste water treatment, agriculture, fabric and textiles, cosmetics, nutritional enhancement and food processing. In addition to its lack of toxicity and allergenicity, its biocompatibility, biodegradability and bioactivity make it a very attractive substance for diverse applications as a biomaterial in the pharmaceutical and medical fields. This review takes a closer look at the biomedical applications of chitosan microspheres. Based on recent research and existing products, some new and potential future approaches in this fascinating area are discussed.
Collapse
Affiliation(s)
- Jaleh Varshosaz
- Department of Pharmaceutics, School of Pharmacy, Isfahan University of Medical Sciences, Isfahan, Iran.
| |
Collapse
|
21
|
Bernkop-Schnürch A, Heinrich A, Greimel A. Development of a novel method for the preparation of submicron particles based on thiolated chitosan. Eur J Pharm Biopharm 2006; 63:166-72. [PMID: 16527469 DOI: 10.1016/j.ejpb.2006.01.002] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2005] [Revised: 01/13/2006] [Accepted: 01/13/2006] [Indexed: 11/22/2022]
Abstract
It was the aim of this study to develop a simple method for the production of thiolated chitosan particles without being ionically crosslinked. In the first step, thiolated chitosan was ionically gelated with tripolyphosphate (TPP) and sulphate in aqueous solution forming submicron particles and microparticles, respectively. In the next step, thiol groups in and on the particles were partially oxidized forming stabilizing inter- and intramolecular disulfide bonds. As the degree of oxidation can be controlled during the production process, the share of thiol and disulfide groups can be adjusted on demand. Thereafter the polyanions were removed. Utilizing this novel preparation method stable particles of a mean size of 366 +/- 30 nm and a zeta potential of around + 11.3 +/- 1.3 mV can be produced using TPP as ionic crosslinker. On average 83% of all thiol groups were oxidized. In contrast, particles did not remain stable after removing sulphate as temporary auxiliary ionic crosslinker. Neither ionically nor covalently crosslinked particles were degraded by lysozyme under physiological conditions. Utilizing the novel method described here allows a simple production of thiolated chitosan particles without losing the cationic charge of chitosan.
Collapse
Affiliation(s)
- Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University Innsbruck, Innsbruck, Austria.
| | | | | |
Collapse
|
22
|
Bernkop-Schnürch A, Weithaler A, Albrecht K, Greimel A. Thiomers: preparation and in vitro evaluation of a mucoadhesive nanoparticulate drug delivery system. Int J Pharm 2006; 317:76-81. [PMID: 16595166 DOI: 10.1016/j.ijpharm.2006.02.044] [Citation(s) in RCA: 97] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2006] [Revised: 02/23/2006] [Accepted: 02/24/2006] [Indexed: 11/22/2022]
Abstract
It was the aim of this study to develop a mucoadhesive nanoparticulate delivery system. Nanoparticles were generated by in situ gellation of the thiomer chitosan-4-thiobutylamidine (chitosan-TBA) with tripolyphosphate (TPP) followed by stabilization via the formation of inter- and intrachain disulfide bonds by oxidation with H(2)O(2) in various concentrations. Afterwards TPP was removed by exhaustive dialysis at pH 1-2. Incorporation of the model compound fluorescein diacetate (FDA) was achieved by incubation of this fluorescence marker, dissolved in acetonitrile, with aqueous particle suspensions for 1h at room temperature. Mucoadhesion studies were performed on porcine intestinal mucosa. Results showed that the preparation method described above leads to nanoparticles of a mean diameter of 268+/-15 nm and a FDA load of 2%. Due to the removal of the anionic crosslinker TPP, the zeta potential of the nanoparticles was raised from 4+/-1 up to 19+/-2 mV without loosing stability of the nanoparticles. The more H(2)O(2) was added to the particles, the more inter- and intrachain disulfide bonds were formed. The more thiol groups were oxidized within the particles, however, the lower was the improvement in mucoadhesive properties. Nevertheless, even when 91% of all thiol groups on the nanoparticles were oxidized, their mucoadhesive properties were still twice as high as the mucoadhesive properties of unmodified nanoparticles. Thiolated chitosan nanoparticles show a two-fold higher zeta potential (I), improved stability (II) and more than doubled mucoadhesive properties (III) than corresponding unmodified chitosan nanoparticles. Therefore, they seem to be advantageous over ionically crosslinked chitosan nanoparticles.
Collapse
Affiliation(s)
- Andreas Bernkop-Schnürch
- Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University Innsbruck, Innrain 52, Josef-Möller-Haus, 6020 Innsbruck, Austria.
| | | | | | | |
Collapse
|
23
|
Yang T, Hussain A, Paulson J, Abbruscato TJ, Ahsan F. Cyclodextrins in nasal delivery of low-molecular-weight heparins: in vivo and in vitro studies. Pharm Res 2005; 21:1127-36. [PMID: 15290851 DOI: 10.1023/b:pham.0000032998.84488.7a] [Citation(s) in RCA: 61] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
PURPOSE To test the hypothesis that cyclodextrins reversibly enhance nasal absorption of low-molecular-weight heparins (LMWHs) and to investigate the mechanisms by which cyclodextrins enhance LMWH absorption via the nose. METHODS Absorption of LMWHs was studied by measuring plasma anti-factor Xa activity after nasal administration of various LMWH formulations to anesthetized rats. In vivo reversibility studies were performed to investigate if the effects of cyclodextrins are reversible and diminish with time. The absorption-enhancing mechanisms of cyclodextrins were investigated in cell culture model. The transport of enoxaparin and mannitol, changes in transepithelial electrical resistance (TEER), and distribution of tight junction protein ZO-1 were investigated. RESULTS Formulations containing 5% dimethyl-beta-cyclodextrin (DMbetaCD) produced the highest increase in the bioavailability of LMWH preparations tested. In vivo reversibility studies with 5% DMbetaCD showed that the effect of the absorption enhancer at the site of administration diminished with time. Transport studies using 16HBE14o(-) cells demonstrated that the increase in the permeability of enoxaparin and mannitol, reduction in TEER, and the changes in the tight junction protein ZO-1 distribution produced by 5% DMbetaCD were much greater than those produced by beta-cyclodextrin (betaCD) or hydroxyl-propyl-beta-cyclodextrin (HPbetaCD). CONCLUSIONS Of the cyclodextrins tested, DMbetaCD was the most efficacious in enhancing absorption of LMWHs both in vivo and in vitro. The study also suggests that cyclodextrins enhance nasal drug absorption by opening of cell-cell tight junctions.
Collapse
Affiliation(s)
- Tianzhi Yang
- Department of Pharmaceutical Sciences, School of Pharmacy, Texas Tech University Health Sciences Center, Amarillo, Texas 79106, USA
| | | | | | | | | |
Collapse
|
24
|
Abstract
This paper describes the basic concepts for the transmucosal delivery of drugs, and in particular the use of the nasal route for delivery of challenging drugs such as polar low-molecular-weight drugs and peptides and proteins. Strategies for the exploitation of absorption enhancers for the improvement of nasal delivery are discussed, including consideration of mechanisms of action and the correlation between toxic effect and absorption enhancement. Selected enhancer systems, such as cyclodextrins, phospholipids, bioadhesive powder systems and chitosan, are discussed in detail. Examples of the use of these enhancers in preclinical and clinical studies are given. Methods for assessing irritancy and damage to the nasal membrane from the use of absorption enhancers are also described. Finally, the mucosal use of absorption enhancers (chitosan) for the improved nasal delivery of vaccines is reported with reference to recent phase I/II clinical studies.
Collapse
Affiliation(s)
- Stanley S Davis
- Institute of Pharmaceutical Sciences, University of Nottingham, Nottingham, UK.
| | | |
Collapse
|