151
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Morales JO, Huang S, Williams RO, McConville JT. Films loaded with insulin-coated nanoparticles (ICNP) as potential platforms for peptide buccal delivery. Colloids Surf B Biointerfaces 2014; 122:38-45. [DOI: 10.1016/j.colsurfb.2014.05.025] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 05/06/2014] [Accepted: 05/16/2014] [Indexed: 01/16/2023]
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152
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Schweizer D, Serno T, Goepferich A. Controlled release of therapeutic antibody formats. Eur J Pharm Biopharm 2014; 88:291-309. [DOI: 10.1016/j.ejpb.2014.08.001] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/28/2014] [Revised: 06/30/2014] [Accepted: 08/03/2014] [Indexed: 10/24/2022]
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153
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Pridgen EM, Alexis F, Farokhzad OC. Polymeric nanoparticle technologies for oral drug delivery. Clin Gastroenterol Hepatol 2014; 12:1605-10. [PMID: 24981782 PMCID: PMC4171204 DOI: 10.1016/j.cgh.2014.06.018] [Citation(s) in RCA: 88] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/24/2014] [Accepted: 06/24/2014] [Indexed: 02/07/2023]
Abstract
Biologics increasingly are being used for the treatment of many diseases. These treatments typically require repeated doses administered by injection. Alternate routes of administration, particularly oral, are considered favorable because of improved convenience and compliance by patients, but physiological barriers such as extreme pH level, enzyme degradation, and poor intestinal epithelium permeability limit absorption. Encapsulating biologics in drug delivery systems such as polymeric nanoparticles prevents inactivation and degradation caused by low pH and enzymes of the gastrointestinal tract. However, transport across the intestinal epithelium remains the most critical barrier to overcome for efficient oral delivery. This review focuses on recent advances in polymeric nanoparticles being developed to overcome transport barriers and their potential for translation into clinical use.
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Affiliation(s)
- Eric M Pridgen
- School of Medicine, Stanford University, Stanford, California.
| | - Frank Alexis
- Department of Bioengineering, Clemson University, Clemson, South Carolina
| | - Omid C Farokhzad
- Laboratory of Nanomedicine and Biomaterials, Department of Anesthesiology, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts; King Abdulaziz University, Jeddah, Saudi Arabia.
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154
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Millotti G, Laffleur F, Perera G, Vigl C, Pickl K, Sinner F, Bernkop-Schnürch A. In vivo evaluation of thiolated chitosan tablets for oral insulin delivery. J Pharm Sci 2014; 103:3165-70. [PMID: 25139279 DOI: 10.1002/jps.24102] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2014] [Revised: 05/20/2014] [Accepted: 06/23/2014] [Indexed: 11/08/2022]
Abstract
Chitosan-6-mercaptonicotinic acid (chitosan-6-MNA) is a thiolated chitosan with strong mucoadhesive properties and a pH-independent reactivity. This study aimed to evaluate the in vivo potential for the oral delivery of insulin. The comparison of the nonconjugated chitosan and chitosan-6-MNA was performed on several studies such as mucoadhesion, release, and in vivo studies. Thiolated chitosan formulations were both about 80-fold more mucoadhesive compared with unmodified ones. The thiolated chitosan tablets showed a sustained release for 5 h for the polymer of 20 kDa and 8 h for the polymer of 400 kDa. Human insulin was quantified in rats' plasma by means of ELISA specific for human insulin with no cross-reactivity with the endogenous insulin. In vivo results showed thiolation having a tremendous impact on the absorption of insulin. The absolute bioavailabilities were 0.73% for chitosan-6-MNA of 20 kDa and 0.62% for chitosan-6-MNA 400 kDa. The areas under the concentration-time curves (AUC) of chitosan-6-MNA formulations compared with unmodified chitosan were 4.8-fold improved for the polymer of 20 kDa and 21.02-fold improved for the polymer of 400 kDa. The improvement in the AUC with regard to the most promising aliphatic thiomer was up to 6.8-fold. Therefore, chitosan-6-MNA represents a promising excipient for the oral delivery of insulin.
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Affiliation(s)
- Gioconda Millotti
- Department of Pharmaceutical Technology, Institute of Pharmacy, Center for Molecular Biosciences Innsbruck, University of Innsbruck, Innsbruck, Austria
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155
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Yang Y, Wang S, Wang Y, Wang X, Wang Q, Chen M. Advances in self-assembled chitosan nanomaterials for drug delivery. Biotechnol Adv 2014; 32:1301-1316. [PMID: 25109677 DOI: 10.1016/j.biotechadv.2014.07.007] [Citation(s) in RCA: 188] [Impact Index Per Article: 18.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Revised: 06/24/2014] [Accepted: 07/30/2014] [Indexed: 02/06/2023]
Abstract
Nanomaterials based on chitosan have emerged as promising carriers of therapeutic agents for drug delivery due to good biocompatibility, biodegradability, and low toxicity. Chitosan originated nanocarriers have been prepared by mini-emulsion, chemical or ionic gelation, coacervation/precipitation, and spray-drying methods. As alternatives to these traditional fabrication methods, self-assembled chitosan nanomaterials show significant advantages and have received growing scientific attention in recent years. Self-assembly is a spontaneous process by which organized structures with particular functions and properties could be obtained without additional complicated processing or modification steps. In this review, we focus on recent progress in the design, fabrication and physicochemical aspects of chitosan-based self-assembled nanomaterials. Their applications in drug delivery of different therapeutic agents are also discussed in details.
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Affiliation(s)
- Yu Yang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Shengpeng Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Yitao Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China
| | - Xiaohui Wang
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China; State Key Laboratory of Pulp and Paper Engineering, South China University of Technology, Guangzhou 510640, China.
| | - Qun Wang
- Department of Chemical and Biological Engineering, Iowa State University, Ames, IA 50011, USA; Department of Civil, Construction and Environmental Engineering, Iowa State University, Ames, IA 50011, USA.
| | - Meiwan Chen
- State Key Laboratory of Quality Research in Chinese Medicine, Institute of Chinese Medical Sciences, University of Macau, Macau 999078, China.
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156
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Xu L, Sheybani N, Ren S, Bowlin GL, Yeudall WA, Yang H. Semi-interpenetrating network (sIPN) co-electrospun gelatin/insulin fiber formulation for transbuccal insulin delivery. Pharm Res 2014; 32:275-85. [PMID: 25030186 DOI: 10.1007/s11095-014-1461-9] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Accepted: 07/02/2014] [Indexed: 12/12/2022]
Abstract
PURPOSE This work was aimed at developing a semi-interpenetrating network (sIPN) co-electrospun gelatin/insulin fiber scaffold (GIF) formulation for transbuccal insulin delivery. METHODS Gelatin was electrospun into fibers and converted into an sIPN following eosin Y-initiated polymerization of polyethylene glycol diacrylate (PEG-DA). The cytocompatibility, degradation rate and mechanical properties were examined in the resulting sIPNs with various ratios of PEG-DA to eosin Y to find a suitable formulation for transbuccal drug delivery. Insulin was co-electrospun with gelatin into fibers and converted into an sIPN-GIF using this suitable formulation. The in vitro release kinetics of insulin was evaluated using ELISA. The bioactivity of released insulin was analyzed in 3T3-L1 preadipocytes using Western blotting and Oil Red O staining. The transbuccal permeability of released insulin was determined using an in vitro porcine oral mucosa model. RESULTS The sIPN-GF formulation of GF cross-linked by PEG-DA (1% w/v) with eosin Y (5% v/v) possessed no cytotoxic effect, a moderate degradation rate with degradation half-life of 49 min, and a significant enhancement in mechanical properties. This formulation was used to fabricate sIPN-GIF. Insulin release was extended up to 4 h by sIPN-GIF. The released insulin successfully triggered intracellular AKT phosphorylation and induced adipocyte differentiation in 3T3-L1 preadipocytes. The transbuccal permeability of released insulin was determined on the order of 10(-7) cm/s. CONCLUSIONS Insulin can be fabricated into an sIPN-GIF formulation following co-electrospinning and cross-linking without losing bioactivity. It proved the potential of this new formulation for transbuccal insulin delivery.
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Affiliation(s)
- Leyuan Xu
- Department of Biomedical Engineering, Virginia Commonwealth University, 401 West Main Street, P.O. Box 843067, Richmond, Virginia, 23284, USA,
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157
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Transdermal delivery of insulin by amidated pectin hydrogel matrix patch in streptozotocin-induced diabetic rats: effects on some selected metabolic parameters. PLoS One 2014; 9:e101461. [PMID: 24987850 PMCID: PMC4079503 DOI: 10.1371/journal.pone.0101461] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2014] [Accepted: 06/05/2014] [Indexed: 11/19/2022] Open
Abstract
PURPOSE Studies in our laboratory are concerned with developing optional insulin delivery routes based on amidated pectin hydrogel matrix gel. We therefore investigated whether the application of pectin insulin (PI)-containing dermal patches of different insulin concentrations sustain controlled release of insulin into the bloodstream of streptozotocin (STZ)-induced diabetic rats with concomitant alleviation of diabetic symptoms in target tissues, most importantly, muscle and liver. METHODS Oral glucose test (OGT) responses to PI dermal matrix patches (2.47, 3.99, 9.57, 16.80 µg/kg) prepared by dissolving pectin/insulin in deionised water and solidified with CaCl2 were monitored in diabetic rats given a glucose load after an 18-h fast. Short-term (5 weeks) metabolic effects were assessed in animals treated thrice daily with PI patches 8 hours apart. Animals treated with drug-free pectin and insulin (175 µg/kg, s.c.) acted as untreated and treated positive controls, respectively. Blood, muscle and liver samples were collected for measurements of selected biochemical parameters. RESULTS After 5 weeks, untreated diabetic rats exhibited hyperglycaemia and depleted hepatic and muscle glycogen concentrations. Compared to untreated STZ-induced diabetic animals, OGT responses of diabetic rats transdermally applied PI patches exhibited lower blood glucose levels whilst short-term treatments restored hepatic and muscle glycogen concentrations. Plasma insulin concentrations of untreated diabetic rats were low compared with control non-diabetic rats. All PI treatments elevated plasma insulin concentrations of diabetic rats although the levels induced by high doses (9.57 and 16.80 µg/kg) were greater than those caused by low doses (2.47 and 3.99 µg/kg) but comparable to those in sc insulin treated animals. CONCLUSIONS The data suggest that the PI hydrogel matrix patch can deliver physiologically relevant amounts of pharmacologically active insulin. NOVELTY OF THE WORK A new method to administer insulin into the bloodstream via a skin patch which could have potential future applications in diabetes management is reported.
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158
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Di J, Price J, Gu X, Jiang X, Jing Y, Gu Z. Ultrasound-triggered regulation of blood glucose levels using injectable nano-network. Adv Healthc Mater 2014; 3:811-6. [PMID: 24255016 PMCID: PMC4026341 DOI: 10.1002/adhm.201300490] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2013] [Revised: 09/16/2013] [Indexed: 11/10/2022]
Abstract
The integration of an injectable insulin-encapsulated nano-network with a focused ultrasound system (FUS) can remotely regulate insulin release both in vitro and in vivo. A single subcutaneous injection of the nano-network with intermittent FUS administration facilitates reduction of the blood glucose levels in type 1 diabetic mice for up to 10 d.
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Affiliation(s)
- Jin Di
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, NC 27695, USA; Eshelman School of Pharmacy, Molecular Pharmaceutics Division, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Jennifer Price
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, NC 27695, USA; Eshelman School of Pharmacy, Molecular Pharmaceutics Division, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
| | - Xiao Gu
- Department of Urology, Clinical Medical College at Yangzhou University, Yangzhou, Jiangsu 225001, P. R. China
| | - Xiaoning Jiang
- Department of Mechanical Engineering, North Carolina State University, NC 27695, USA
| | - Yun Jing
- Department of Mechanical Engineering, North Carolina State University, NC 27695, USA
| | - Zhen Gu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, NC 27695, USA; Eshelman School of Pharmacy, Molecular Pharmaceutics Division, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA
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159
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Abstract
Porous CaCO₃ vaterite microparticles have been introduced a decade ago as sacrificial cores and becoming nowadays as one of the most popular templates to encapsulate bioactive molecules. This is due to the following beneficial features: i) mild decomposition conditions, ii) highly developed surface area, and iii) controlled size as well as easy and chip preparation. Such properties allow one to template and design particles with well tuned material properties in terms of composition, structure, functionality -- the parameters crucially important for bioapplications. This review presents a recent progress in utilizing the CaCO₃ cores for the assembly of micrometer-sized beads and capsules with encapsulated both small drugs and large biomacromolecules. Bioapplications of all the particles for drug delivery, biotechnology, and biosensing as well as future perspectives for templating are addressed.
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Affiliation(s)
- Dmitry Volodkin
- Fraunhofer Institute for Biomedical Engineering (IBMT), Am Muehlenberg 13, 14476 Potsdam-Golm, Germany.
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160
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161
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162
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Mo R, Jiang T, Di J, Tai W, Gu Z. Emerging micro- and nanotechnology based synthetic approaches for insulin delivery. Chem Soc Rev 2014; 43:3595-629. [PMID: 24626293 DOI: 10.1039/c3cs60436e] [Citation(s) in RCA: 276] [Impact Index Per Article: 27.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Insulin is essential for type 1 and advanced type 2 diabetics to maintain blood glucose levels and prolong lives. The traditional administration requires frequent subcutaneous insulin injections that are associated with poor patient compliance, including pain, local tissue necrosis, infection, and nerve damage. Taking advantage of emerging micro- and nanotechnologies, numerous alternative strategies integrated with chemical approaches for insulin delivery have been investigated. This review outlines recent developments in the controlled delivery of insulin, including oral, nasal, pulmonary, transdermal, subcutaneous and closed-loop insulin delivery. Perspectives from new materials, formulations and devices at the micro- or nano-scales are specifically surveyed. Advantages and limitations of current delivery methods, as well as future opportunities and challenges are also discussed.
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Affiliation(s)
- Ran Mo
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, NC 27695, USA.
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163
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Schmidt S, Uhlig K, Duschl C, Volodkin D. Stability and cell uptake of calcium carbonate templated insulin microparticles. Acta Biomater 2014; 10:1423-30. [PMID: 24275529 DOI: 10.1016/j.actbio.2013.11.011] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2013] [Revised: 10/23/2013] [Accepted: 11/14/2013] [Indexed: 01/06/2023]
Abstract
Therapeutic proteins are an integral part of today's pharmaceutical practice, but they still present challenges from the drug delivery point of view. In this work, a new approach is studied based on hard templating for fabrication of microparticles composed of pure insulin, which may enable effective delivery, for instance pulmonary delivery. The approach is both simple and versatile: the protein particles are prepared by selective precipitation into porous CaCO3 microtemplates, followed by full decomposition of the template at the isoelectric point of the protein (pH 5.2). Control over the main material parameters (mechanical properties, porosity, morphology and stability at physiological conditions) are critical for the envisioned application in drug delivery. It is demonstrated that these critical parameters can be significantly tuned by a slight final pH variation around the isoelectric point (pH range 4-6) and by the denaturation degree of insulin. Electrostatic interactions and inter-protein crosslinking in the protein particles as well as their internal structure are considered, to explain the variation in the particle properties. The particle property parameters are explored using atomic force microscopy, optical microscopy and circular dichroism spectra. Finally, phagocytic clearance of the protein particles in vitro was studied to explore possible enhancements in particle fabrication to improve the efficiency of insulin delivery by inhalation.
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Affiliation(s)
- S Schmidt
- Fraunhofer Institut für Biomedizinische Technik, Am Mühlenberg 13, 14476 Potsdam-Golm, Germany; Universität Leipzig, Institut für Biochemie, Johannisalle 21-23, 04103 Leipzig, Germany
| | - K Uhlig
- Fraunhofer Institut für Biomedizinische Technik, Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - C Duschl
- Fraunhofer Institut für Biomedizinische Technik, Am Mühlenberg 13, 14476 Potsdam-Golm, Germany
| | - D Volodkin
- Fraunhofer Institut für Biomedizinische Technik, Am Mühlenberg 13, 14476 Potsdam-Golm, Germany.
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164
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Advanced progress of microencapsulation technologies: In vivo and in vitro models for studying oral and transdermal drug deliveries. J Control Release 2014; 178:25-45. [DOI: 10.1016/j.jconrel.2013.12.028] [Citation(s) in RCA: 126] [Impact Index Per Article: 12.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2013] [Revised: 12/10/2013] [Accepted: 12/17/2013] [Indexed: 11/20/2022]
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165
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Boateng JS, Ayensu I. Preparation and characterization of laminated thiolated chitosan-based freeze-dried wafers for potential buccal delivery of macromolecules. Drug Dev Ind Pharm 2014; 40:611-8. [PMID: 24506457 DOI: 10.3109/03639045.2014.884126] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
This study involves the development and functional characterization of a thiolated chitosan (CS) system for potential buccal delivery of proteins. Thiolated CS was synthesized by conjugating pure CS with thioglycolic acid and dialyzed to remove excess acid. Amount of thiol groups immobilized on CS was determined using L-cysteine calibration curve. The weight average molecular weights of CS and thiolated CS were monitored using gel permeation chromatography. Laminated wafers were obtained by pouring gels (containing bovine serum albumin; BSA, different amounts of glutathione as enzyme inhibitor and mucin to mimic salivary conditions) of the thiolated CS into moulds previously lined with impervious ethylcellulose (EC) films and freeze-dried. The resulting formulations were analyzed using attenuated total reflectance Fourier transform infrared (FTIR) spectroscopy, circular dichroism (CD) and scanning electron microscopy (SEM). The formulations were further characterized for functional buccal mucosa performance using hydration, swelling, mucoadhesion and in vitro drug dissolution studies. FTIR showed successful thiolation of CS's amine functionality, CD confirmed that BSA conformation remained unchanged throughout the gel formulation and freeze-drying process, whilst SEM showed a porous microstructure of the wafers and a uniform EC film laminate with no visible pores or cracks. The functional characterization studies showed that glutathione had significant effects on hydration, mucoadhesion and subsequently drug dissolution and release characteristics, whilst mucin affected the mucoadhesive properties of the wafers. It was concluded that BSA-loaded wafers containing 10% w/w glutathione as enzyme inhibitor was the formulation choice for potential buccal delivery and should be selected for further investigations.
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Affiliation(s)
- Joshua S Boateng
- Department of Pharmaceutical, Chemical and Environmental Sciences, Faculty of Engineering and Science, University of Greenwich at Medway , Chatham Maritime, Kent , UK
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166
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Abstract
Research in animals and humans has associated Alzheimer's disease (AD) with decreased cerebrospinal fluid levels of insulin in combination with decreased insulin sensitivity (insulin resistance) in the brain. This phenomenon is accompanied by attenuated receptor expression of insulin and insulin-like growth factor, enhanced serine phosphorylation of insulin receptor substrate-1, and impaired transport of insulin across the blood-brain barrier. Moreover, clinical trials have demonstrated that intranasal insulin improves both memory performance and metabolic integrity of the brain in patients suffering from AD or its prodrome, mild cognitive impairment. These results, in conjunction with the finding that insulin mitigates hippocampal synapse vulnerability to beta amyloid, a peptide thought to be causative in the development of AD, provide a strong rationale for hypothesizing that pharmacological strategies bolstering brain insulin signaling, such as intranasal administration of insulin, could have significant potential in the treatment and prevention of AD. With this view in mind, the review at hand will present molecular mechanisms potentially underlying the memory-enhancing and neuroprotective effects of intranasal insulin. Then, we will discuss the results of intranasal insulin studies that have demonstrated that enhancing brain insulin signaling improves memory and learning processes in both cognitively healthy and impaired humans. Finally, we will provide an overview of neuroimaging studies indicating that disturbances in insulin metabolism--such as insulin resistance in obesity, type 2 diabetes and AD--and altered brain responses to insulin are linked to decreased cerebral volume and especially to hippocampal atrophy.
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167
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Kavitha T, Kang IK, Park SY. Poly(acrylic acid)-grafted graphene oxide as an intracellular protein carrier. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2014; 30:402-409. [PMID: 24377671 DOI: 10.1021/la404337d] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
A pH-sensitive poly(acrylic acid)-grafted graphene oxide (GO-PAA) nanocarrier was synthesized by in situ atom transfer radical polymerization to allow the oral delivery of hydrophilic macromolecular proteins in their active forms to specific cells or organs. The synthesis, morphology, and physiochemical properties of GO-PAA were examined. A model protein, bovine serum albumin (BSA) labeled with fluorescein isothiocyanate (FITC) (BSAFITC), was loaded onto GO-PAA through noncovalent interactions and its release was arrested at acidic pH similar to stomach, whereas at pH similar to intestine it was reduced, which paves way for site specific delivery without its degradation in the gastrointestinal tract. Confocal laser microscopy showed that the BSAFITC-loaded GO-PAA was internalized by KB cells by endocytosis and released into cytoplasm. Thus the GO-PAA as a transmembrane transporter is a new class of drug transporters with potential protein delivery applications.
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Affiliation(s)
- Thangavelu Kavitha
- Department of Polymer Science and Engineering, Kyungpook National University , Daegu 702-701, Republic of Korea
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168
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Ramesan RM, Sharma CP. Challenges and advances in nanoparticle-based oral insulin delivery. Expert Rev Med Devices 2014; 6:665-76. [DOI: 10.1586/erd.09.43] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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169
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Choi SR, Jang DJ, Kim S, An S, Lee J, Oh E, Kim J. Polymer-coated spherical mesoporous silica for pH-controlled delivery of insulin. J Mater Chem B 2014; 2:616-619. [DOI: 10.1039/c3tb21494j] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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170
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Lima HA, Lia FMV, Ramdayal S. Preparation and Characterization of Chitosan-Insulin-Tripolyphosphate Membrane for Controlled Drug Release: Effect of Cross Linking Agent. ACTA ACUST UNITED AC 2014. [DOI: 10.4236/jbnb.2014.54025] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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171
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Development of insulin loaded mesoporous silica injectable particles layered by chitosan as a controlled release delivery system. Int J Pharm 2014; 461:448-58. [DOI: 10.1016/j.ijpharm.2013.12.014] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Revised: 11/11/2013] [Accepted: 12/14/2013] [Indexed: 11/23/2022]
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172
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Chen J, Qiu Y, Zhang S, Yang G, Gao Y. Controllable coating of microneedles for transdermal drug delivery. Drug Dev Ind Pharm 2013; 41:415-22. [DOI: 10.3109/03639045.2013.873447] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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173
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Agrawal AK, Harde H, Thanki K, Jain S. Improved Stability and Antidiabetic Potential of Insulin Containing Folic Acid Functionalized Polymer Stabilized Multilayered Liposomes Following Oral Administration. Biomacromolecules 2013; 15:350-60. [DOI: 10.1021/bm401580k] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Ashish Kumar Agrawal
- Centre for Pharmaceutical
Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar (Mohali), Punjab-160062 India
| | - Harshad Harde
- Centre for Pharmaceutical
Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar (Mohali), Punjab-160062 India
| | - Kaushik Thanki
- Centre for Pharmaceutical
Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar (Mohali), Punjab-160062 India
| | - Sanyog Jain
- Centre for Pharmaceutical
Nanotechnology, Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector 67, S.A.S. Nagar (Mohali), Punjab-160062 India
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174
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Hoe S, Boraey MA, Ivey JW, Finlay WH, Vehring R. Manufacturing and device options for the delivery of biotherapeutics. J Aerosol Med Pulm Drug Deliv 2013; 27:315-28. [PMID: 24299502 DOI: 10.1089/jamp.2013.1090] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Biotherapeutic aerosol formulations are an intense area of interest for systemic and local drug delivery. This article provides a short overview of typical factors required specifically for biotherapeutic aerosol formulation design, the processing options open for consideration, and the issue of inhalation device selection. Focusing on spray drying, four case studies are used to highlight the relevant issues, describing investigations into: (1) the mechanical stresses occurring in bacteriophage formulations during spray-dryer atomization; (2) modeling of the spray-dryer process and droplet drying kinetics, to assist process design and predictions of formulation stability; (3) a predictive approach to the design and processing of a five-component dry powder aerosol formulation; and (4) the survival of bacteriophages after pressurized metered dose inhaler atomization.
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Affiliation(s)
- Susan Hoe
- Department of Mechanical Engineering, University of Alberta , Edmonton, AB, Canada
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175
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Li X, Guo S, Zhu C, Zhu Q, Gan Y, Rantanen J, Rahbek UL, Hovgaard L, Yang M. Intestinal mucosa permeability following oral insulin delivery using core shell corona nanolipoparticles. Biomaterials 2013; 34:9678-87. [DOI: 10.1016/j.biomaterials.2013.08.048] [Citation(s) in RCA: 108] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2013] [Accepted: 08/19/2013] [Indexed: 01/20/2023]
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176
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Zhu X, Shan W, Zhang P, Jin Y, Guan S, Fan T, Yang Y, Zhou Z, Huang Y. Penetratin derivative-based nanocomplexes for enhanced intestinal insulin delivery. Mol Pharm 2013; 11:317-28. [PMID: 24255985 DOI: 10.1021/mp400493b] [Citation(s) in RCA: 67] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Sufficient mucosal permeability is the bottleneck problem in developing an efficient intestinal delivery system of insulin. Cell-penetrating peptide-based nanocomplexes for the enhanced mucosal permeation of insulin were developed in this study. Penetratin, a cell-penetrating peptide was site-specifically modified with a bis-β-cyclodextrin group. Insulin-loaded nanocomplexes were prepared by self-assembly using penetratin or its bis-β-cyclodextrin modified derivative (P-bis-CD). A stronger intermolecular interaction and higher complex stability were observed for P-bis-CD nanocomplexes than the penetratin nanocomplexes. P-bis-CD nanocomplexes were significantly more efficient for the permeation of insulin as compared to the penetratin nanocomplexes both in vitro and in situ. Interestingly, different cellular internalization mechanisms were observed for the two nanocomplexes. In diabetic rats, intestinal administration of P-bis-CD nanocomplexes resulted in a prominent hypoglycemic effect which lasted for 6 h with maximum inhibitory rate at 60%. The relative pharmacological availability and bioavailability of P-bis-CD nanocomplexes were 10.6% and 7.1%, which were 3.0-fold and 2.3-fold higher than that of penetratin nanocomplexes, respectively. In addition, no sign of toxicity was observed after 7 consecutive days of administration of P-bis-CD nanocomplexes with endotoxin. These results demonstrated that P-bis-CD was a promising epithelium permeation enhancer for insulin and suggested that the chemical modification of cell penetration peptides was a feasible strategy to enhance their potential.
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Affiliation(s)
- Xi Zhu
- Key Laboratory of Drug Targeting and Drug Delivery System, Ministry of Education, West China School of Pharmacy, Sichuan University , No. 17, Block 3, Southern Renmin Road, Chengdu 610041, P. R. China
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177
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Kamei N, Onuki Y, Takayama K, Takeda-Morishita M. Mechanistic Study of the Uptake/Permeation of Cell-Penetrating Peptides Across a Caco-2 Monolayer and Their Stimulatory Effect on Epithelial Insulin Transport. J Pharm Sci 2013; 102:3998-4008. [DOI: 10.1002/jps.23708] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2013] [Revised: 07/16/2013] [Accepted: 07/31/2013] [Indexed: 11/07/2022]
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178
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Ling MH, Chen MC. Dissolving polymer microneedle patches for rapid and efficient transdermal delivery of insulin to diabetic rats. Acta Biomater 2013; 9:8952-61. [PMID: 23816646 DOI: 10.1016/j.actbio.2013.06.029] [Citation(s) in RCA: 184] [Impact Index Per Article: 16.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2013] [Revised: 06/04/2013] [Accepted: 06/19/2013] [Indexed: 01/23/2023]
Abstract
This study presents a dissolving microneedle patch, composed of starch and gelatin, for the rapid and efficient transdermal delivery of insulin. The microneedles completely dissolve after insertion into the skin for 5 min, quickly releasing their encapsulated payload into the skin. A histological examination shows that the microneedles have sufficient mechanical strength to be inserted in vitro into porcine skin to a depth of approximately 200 μm and in vivo into rat skin to 200-250 μm depth. This penetration depth does not induce notable skin irritation or pain sensation. To evaluate the feasibility of using these dissolving microneedles for diabetes treatment insulin-loaded microneedles were administered to diabetic rats using a homemade applicator. Pharmacodynamic and pharmacokinetic results show a similar hypoglycemic effect in rats receiving insulin-loaded microneedles and a subcutaneous injection of insulin. The relative pharmacological availability and relative bioavailability of insulin were both approximately 92%, demonstrating that insulin retains its pharmacological activity after encapsulation and release from the microneedles. Storage stability analysis confirms that more than 90% of the insulin remained in the microneedles even after storage at 25 or 37°C for 1 month. These results confirm that the proposed starch/gelatin microneedles enable stable encapsulation of bioactive molecules and have great potential for transdermal delivery of protein drugs in a relatively painless, rapid, and convenient manner.
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Affiliation(s)
- Ming-Hung Ling
- Department of Chemical Engineering, National Cheng Kung University, Tainan 70101, Taiwan
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179
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Millotti G, Vetter A, Leithner K, Sarti F, Shahnaz Bano G, Augustijns P, Bernkop-Schnürch A. Development of thiolated poly(acrylic acid) microparticles for the nasal administration of exenatide. Drug Dev Ind Pharm 2013; 40:1677-82. [PMID: 24131355 DOI: 10.3109/03639045.2013.842578] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
The purpose of this study was to develop a microparticulate formulation for nasal delivery of exenatide utilizing a thiolated polymer. Poly(acrylic acid)-cysteine (PAA-cys) and unmodified PAA microparticles loaded with exenatide were prepared via coprecipitation of the drug and the polymer followed by micronization. Particle size, drug load and release of incorporated exenatide were evaluated. Permeation enhancing properties of the formulations were investigated on excised porcine respiratory mucosa. The viability of the mucosa was investigated by histological studies. Furthermore, ciliary beat frequency (CBF) studies were performed. Microparticles displayed a mean size of 70-80 µm. Drug encapsulation was ∼80% for both thiolated and non-thiolated microparticles. Exenatide was released from both thiolated and non-thiolated particles in comparison to exenatide in buffer only within 40 min. As compared to exenatide dissolved in buffer only, non-thiolated and thiolated microparticles resulted in a 2.6- and 4.7-fold uptake, respectively. Histological studies performed before and after permeation studies showed that the mucosa is not damaged during permeation studies. CBF studies showed that the formulations were cilio-friendly. Based on these results, poly(acrylic acid)-cysteine-based microparticles seem to be a promising approach starting point for the nasal delivery of exenatide.
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Affiliation(s)
- Gioconda Millotti
- Department of Pharmaceutical Technology, Institute of Pharmacy, Leopold-Franzens-University Innsbruck, CCB-Center for Chemistry and Biochemistry , Innsbruck, Austria , Europe and
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180
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Zhang L, Zhang Z, Li N, Wang N, Wang Y, Tang S, Xu L, Ren Y. Synthesis and evaluation of a novel β-cyclodextrin derivative for oral insulin delivery and absorption. Int J Biol Macromol 2013; 61:494-500. [DOI: 10.1016/j.ijbiomac.2013.08.034] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2013] [Accepted: 08/23/2013] [Indexed: 12/30/2022]
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181
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He P, Liu H, Tang Z, Deng M, Yang Y, Pang X, Chen X. Poly(ester amide) blend microspheres for oral insulin delivery. Int J Pharm 2013; 455:259-66. [DOI: 10.1016/j.ijpharm.2013.07.022] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2013] [Revised: 06/13/2013] [Accepted: 07/07/2013] [Indexed: 10/26/2022]
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182
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Cai Y, Wei L, Ma L, Huang X, Tao A, Liu Z, Yuan W. Long-acting preparations of exenatide. DRUG DESIGN DEVELOPMENT AND THERAPY 2013; 7:963-70. [PMID: 24039406 PMCID: PMC3771853 DOI: 10.2147/dddt.s46970] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Exenatide has been widely used for the treatment of type 2 diabetes mellitus. However, its short plasma half-life of 2.4 hours has limited its clinical application. The exenatide products on the market, twice-daily Byetta™ and once-weekly Bydureon™ (both Amylin Pharmaceuticals, San Diego, CA, USA), are still not perfect. Many researchers have attempted to prolong the acting time of exenatide by preparing sustained-release dosage forms, modifying its structure, gene therapies, and other means. This review summarizes recent advances in long-acting exenatide preparations.
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Affiliation(s)
- Yunpeng Cai
- Department of Neurology, Xinhua Hospital affiliated to Shanghai Jiaotong University School of Medicine, Shanghai, People's Republic of China
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183
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Zhao X, Shan C, Zu Y, Zhang Y, Wang W, Wang K, Sui X, Li R. Preparation, characterization, and evaluation in vivo of Ins-SiO2-HP55 (insulin-loaded silica coating HP55) for oral delivery of insulin. Int J Pharm 2013; 454:278-84. [DOI: 10.1016/j.ijpharm.2013.06.051] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2013] [Revised: 05/09/2013] [Accepted: 06/13/2013] [Indexed: 10/26/2022]
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184
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Balabushevich NG, Pechenkin MA, Shibanova ED, Volodkin DV, Mikhalchik EV. Multifunctional polyelectrolyte microparticles for oral insulin delivery. Macromol Biosci 2013; 13:1379-88. [PMID: 23861285 DOI: 10.1002/mabi.201300207] [Citation(s) in RCA: 47] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2013] [Revised: 05/24/2013] [Indexed: 01/05/2023]
Abstract
Multicomponent insulin-containing microparticles are prepared by layer-by-layer assembly of dextran sulfate and chitosan on the core of protein-polyanion complex with or without protease inhibitors. Oral bioavailability of the encapsulated insulin is improved due to the cumulative effect of each component. A physico-chemical study shows that the particle design allows adjustment of the pH-dependent profile of the insulin release, as well as mucoadhesive properties and Ca(2+) binding ability of the microparticles. Supplementing the microparticles with 2-3% protease inhibitors fully prevents proteolysis of human insulin. The pharmacological effect of microencapsulated insulin in doses 50-100 IU kg(-1) is demonstrated in chronic experiments after oral administration to diabetic rats fed ad libitum.
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Affiliation(s)
- Nadezhda G Balabushevich
- Lomonosov Moscow State University, Department of Chemistry, Leninskiye Gory 1-3, 119991, Moscow, Russia.
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185
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The use of low molecular weight protamine chemical chimera to enhance monomeric insulin intestinal absorption. Biomaterials 2013; 34:7733-43. [PMID: 23863452 DOI: 10.1016/j.biomaterials.2013.06.047] [Citation(s) in RCA: 51] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2013] [Accepted: 06/23/2013] [Indexed: 12/13/2022]
Abstract
Although oral delivery of insulin offers a number of unmatched advantages, it nevertheless is beset by the poor permeability of insulin molecules through the epithelial cell membranes of the intestinal mucosal layer. We previously reported the development of low molecular weight protamine (LMWP) as a non-toxic yet potent cell-penetrating peptide, of which via covalent linkage was capable of translocating protein cargos through the membranes of almost all cell types. It is therefore hypothesized that LMWP could be practically employed as a safe and effective tool to deliver insulin across the intestinal mucosal membrane, thereby augmenting its absorption through the GI tract. However, formulating 1:1 monomeric insulin/LMWP conjugate presents a tall order of challenge, as the acidic insulin and basic LMWP would automatically form tight aggregates through electrostatic interactions. In this paper, we developed an innovative conjugation strategy to solve this problem, by using succinimidyl-[(N-maleimidopropionamido)-polyethyleneglycol] ester (NHS-PEG-MAL) as an intermediate cross-linker during the coupling process. Both SDS-PAGE and MALDI-TOF mass spectroscopy confirmed the formation of a homogenous, monomeric (1:1 ratio) insulin/LMWP conjugate without encountering the conventional problem of substrate aggregation. Cell culture studies demonstrated that transport of the Insulin-PEG-LMWP conjugate across the intestinal mucosal monolayer was augmented by almost five-folds compared to native insulin. Furthermore, results from the in situ loop absorption tests in rats showed that systemic pharmacological bioavailability of insulin was significantly enhanced after its conjugation with LMWP. Overall, the presented chemical conjugation with LMWP could offer a reliable and safe means to improve the intestinal permeability of therapeutic peptides/proteins, shedding light of the possibility for their effective oral delivery.
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186
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Wu W, Zhou S. Responsive materials for self-regulated insulin delivery. Macromol Biosci 2013; 13:1464-77. [PMID: 23839986 DOI: 10.1002/mabi.201300120] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2013] [Revised: 03/11/2013] [Indexed: 01/17/2023]
Abstract
With diabetes mellitus becoming an important public health concern, insulin-delivery systems are attracting increasing interest from both scientific and technological researchers. This feature article covers the present state-of-the-art glucose-responsive insulin-delivery system (denoted as GRIDS), based on responsive polymer materials, a promising system for self-regulated insulin delivery. Three types of GRIDS are discussed, based on different fundamental mechanisms of glucose-recognition, with: a) glucose enzyme, b) glucose binding protein, and c) synthetic boronic acid as the glucose-sensitive component. At the end, a personal perspective on the major issues yet to be worked out in future research is provided.
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Affiliation(s)
- Weitai Wu
- State Key Laboratory for Physical Chemistry of Solid Surfaces, and Department of Chemistry, College of Chemistry and Chemical Engineering, Xiamen University, Xiamen, 361005, China.
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187
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Noninvasive insulin delivery: the great potential of cell-penetrating peptides. Ther Deliv 2013; 4:315-26. [PMID: 23442079 DOI: 10.4155/tde.12.164] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Insulin, a potent therapeutic peptide used in the treatment of diabetes, is administered to patients via subcutaneous injections because of the poor pharmacokinetics associated with alternative routes of administration such as oral, nasal and pulmonary delivery. Noninvasive nasal and oral formulations are appealing to patients who need consecutive daily treatments of insulin. However, to achieve mucosal absorption of insulin via oral or nasal administration, two barriers must be overcome: the impermeability of insulin through the epithelial membranes and local digestion and enzymatic degradation. Cell-penetrating peptides (CPPs), which efficiently bring exogenous proteins and nucleic acids into cells, have great potential to facilitate insulin permeation from the intestinal lumen or nasal cavity into systemic circulation via efficient uptake by epithelial cells. In fact, the coadministration of insulin with the peptide penetratin, a typical CPP, increased intestinal and nasal insulin bioavailability to 35 and 50%, respectively. In this review, the authors describe recent findings using this novel CPP-based formulation for noninvasive delivery of insulin.
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188
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Kwon KC, Verma D, Singh ND, Herzog R, Daniell H. Oral delivery of human biopharmaceuticals, autoantigens and vaccine antigens bioencapsulated in plant cells. Adv Drug Deliv Rev 2013; 65:782-99. [PMID: 23099275 PMCID: PMC3582797 DOI: 10.1016/j.addr.2012.10.005] [Citation(s) in RCA: 94] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 09/26/2012] [Accepted: 10/17/2012] [Indexed: 12/19/2022]
Abstract
Among 12billion injections administered annually, unsafe delivery leads to >20million infections and >100million reactions. In an emerging new concept, freeze-dried plant cells (lettuce) expressing vaccine antigens/biopharmaceuticals are protected in the stomach from acids/enzymes but are released to the immune or blood circulatory system when plant cell walls are digested by microbes that colonize the gut. Vaccine antigens bioencapsulated in plant cells upon oral delivery after priming, conferred both mucosal and systemic immunity and protection against bacterial, viral or protozoan pathogens or toxin challenge. Oral delivery of autoantigens was effective against complications of type 1 diabetes and hemophilia, by developing tolerance. Oral delivery of proinsulin or exendin-4 expressed in plant cells regulated blood glucose levels similar to injections. Therefore, this new platform offers a low cost alternative to deliver different therapeutic proteins to combat infectious or inherited diseases by eliminating inactivated pathogens, expensive purification, cold storage/transportation and sterile injections.
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Affiliation(s)
- Kwang-Chul Kwon
- Department of Molecular Biology and Microbiology, College of Medicine, University of Central Florida, Biomolecular Science Building, Orlando, FL 32816-2364, USA
| | - Dheeraj Verma
- Department of Molecular Biology and Microbiology, College of Medicine, University of Central Florida, Biomolecular Science Building, Orlando, FL 32816-2364, USA
| | - Nameirakpam D. Singh
- Department of Molecular Biology and Microbiology, College of Medicine, University of Central Florida, Biomolecular Science Building, Orlando, FL 32816-2364, USA
| | - Roland Herzog
- Department of Pediatrics, College of Medicine, University of Florida, Cancer and Genetics Research Complex, 2033 Mowry Road, Gainesville, FL 32610, USA
| | - Henry Daniell
- Department of Molecular Biology and Microbiology, College of Medicine, University of Central Florida, Biomolecular Science Building, Orlando, FL 32816-2364, USA
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189
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Li H, Yu Y, Faraji Dana S, Li B, Lee CY, Kang L. Novel engineered systems for oral, mucosal and transdermal drug delivery. J Drug Target 2013; 21:611-29. [PMID: 23869879 DOI: 10.3109/1061186x.2013.805335] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Technological advances in drug discovery have resulted in increasing number of molecules including proteins and peptides as drug candidates. However, how to deliver drugs with satisfactory therapeutic effect, minimal side effects and increased patient compliance is a question posted before researchers, especially for those drugs with poor solubility, large molecular weight or instability. Microfabrication technology, polymer science and bioconjugate chemistry combine to address these problems and generate a number of novel engineered drug delivery systems. Injection routes usually have poor patient compliance due to their invasive nature and potential safety concerns over needle reuse. The alternative non-invasive routes, such as oral, mucosal (pulmonary, nasal, ocular, buccal, rectal, vaginal), and transdermal drug delivery have thus attracted many attentions. Here, we review the applications of the novel engineered systems for oral, mucosal and transdermal drug delivery.
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Affiliation(s)
- Hairui Li
- Department of Pharmacy, National University of Singapore, Singapore
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190
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Esmaeili A, Rahnamoun S, Sharifnia F. Effect of O/W process parameters on Crataegus azarolus L nanocapsule properties. J Nanobiotechnology 2013; 11:16. [PMID: 23718829 PMCID: PMC3673818 DOI: 10.1186/1477-3155-11-16] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/14/2013] [Accepted: 05/13/2013] [Indexed: 11/18/2022] Open
Abstract
Background Nanocapsules have many applications in the drug, cosmetic, fragrance, and food industries. In this study, Crataegus azarolus L. nanocapsules were prepared by a modified emulsion diffusion technique. Methods In this technique a shell was first made from the polyester triblock copolymer poly(ethylene glycol)-poly(butylene adipate)-poly(ethylene glycol) (PEG-PBA-PEG) and then olive oil was set as the core of the nanocapsule by a method known as the polymer deposition solvent evaporation method. Varying amounts of C. azarolus extract, polymer, and olive oil were mixed in acetone and then added to water on a shaker. Finally, the acetone was removed by vacuuming. Results The size of the prepared nanocapsules were measured with a particle size analysis report (PSAR) and identified by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), and nuclear magnetic resonance (NMR). Conclusions Our experiments showed that the size of the nanocapsules depends on the preparation conditions, i.e., the ratio of polymer to oil and concentrations of polymer and plant extract. A ratio of 1:0.25 polymer to oil was shown to be more suitable for the formation of smaller nanocapsules of C. azarolus.
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Affiliation(s)
- Akbar Esmaeili
- Department of Chemical Engineering, North Tehran Branch, Islamic Azad University, Tehran, Iran.
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191
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Biocompatibility, cellular uptake and biodistribution of the polymeric amphiphilic nanoparticles as oral drug carriers. Colloids Surf B Biointerfaces 2013; 103:345-53. [DOI: 10.1016/j.colsurfb.2012.11.012] [Citation(s) in RCA: 41] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2012] [Revised: 11/08/2012] [Accepted: 11/10/2012] [Indexed: 11/23/2022]
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192
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Abstract
Oral delivery of insulin may significantly improve the quality of life of diabetes patients who routinely receive insulin by the subcutaneous route. In fact, compared with this administration route, oral delivery of insulin in diabetes treatment offers many advantages: higher patient compliance, rapid hepatic insulinization, and avoidance of peripheral hyperinsulinemia and other adverse effects such as possible hypoglycemia and weight gain. However, the oral delivery of insulin remains a challenge because its oral absorption is limited. The mainbarriers faced by insulin in the gastrointestinal tract are degradation by proteolytic enzymes and lack of transport across the intestinal epithelium. Several strategies to deliver insulin orally have been proposed, but without much clinical or commercial success. Protein encapsulation into nanoparticles is regarded as a promising alternative to administer insulin orally because they have the ability to promote insulin paracellular or transcellular transport across the intestinal mucosa. In this review, different delivery systems intended to increase the oral bioavailability of insulin will be discussed, with a special focus on nanoparticulate carrier systems, as well as the efforts that pharmaceutical companies are making to bring to the market the first oral delivery system of insulin. The toxicological and safety data of delivery systems, the clinical value and progress of oral insulin delivery, and the future prospects in this research field will be also scrutinized.
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Affiliation(s)
- Pedro Fonte
- Centro de Investigação em Ciências da Saúde (CICS), Instituto Superior de Ciências da Saúde—Norte, CESPU, Gandra, Portugal
- REQUIMTE, Department of Chemistry, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Francisca Araújo
- Centro de Investigação em Ciências da Saúde (CICS), Instituto Superior de Ciências da Saúde—Norte, CESPU, Gandra, Portugal
| | - Salette Reis
- REQUIMTE, Department of Chemistry, Faculty of Pharmacy, University of Porto, Porto, Portugal
| | - Bruno Sarmento
- Centro de Investigação em Ciências da Saúde (CICS), Instituto Superior de Ciências da Saúde—Norte, CESPU, Gandra, Portugal
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Porto, Portugal
- INEB—Institute for Biomedical Engineering, University of Porto, Porto, Portugal
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193
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Kamei N, Kikuchi S, Takeda-Morishita M, Terasawa Y, Yasuda A, Yamamoto S, Ida N, Nishio R, Takayama K. Determination of the Optimal Cell-Penetrating Peptide Sequence for Intestinal Insulin Delivery Based on Molecular Orbital Analysis with Self-Organizing Maps. J Pharm Sci 2013; 102:469-79. [DOI: 10.1002/jps.23364] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 10/09/2012] [Accepted: 10/19/2012] [Indexed: 11/08/2022]
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194
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Li K, Yu L, Liu X, Chen C, Chen Q, Ding J. A long-acting formulation of a polypeptide drug exenatide in treatment of diabetes using an injectable block copolymer hydrogel. Biomaterials 2013; 34:2834-42. [PMID: 23352120 DOI: 10.1016/j.biomaterials.2013.01.013] [Citation(s) in RCA: 121] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2012] [Accepted: 01/03/2013] [Indexed: 12/12/2022]
Abstract
This study is aimed to develop a long-acting injectable formulation in treatment of type II diabetes. A glucoregulatory polypeptide, exenatide (EXT), was chosen as the model drug, and an aqueous block copolymer system with a sol-gel transition upon the increase of temperature was selected as the delivery matrix of EXT. The thermoreversible hydrogel composed of poly(lactic acid-co-glycolic acid)-poly(ethylene glycol)-poly(lactic acid-co-glycolic acid) (PLGA-PEG-PLGA) triblock copolymers was found to slower the degradation of the polypeptide to a large extent. However, the initial formulation in this study exhibited a significant drug burst effect, which is a common problem to load a hydrophilic small or medium-size polypeptide into a hydrogel. Zinc acetate was then introduced to slow down the EXT release by formation of insoluble Zn-EXT complexes in the thermogel matrix. Yet an incomplete release became another crucial problem, which is also common for peptide and protein delivery. The synergistic effect of three excipients (zinc acetate, PEG, and sucrose) under an appropriate condition overcame these two problems simultaneously, and the sustained release of drug lasted for 1 week. In vivo experiments via mice oral glucose tolerance tests demonstrated an improved glucose tolerance for 1 week after a single subcutaneous injection of the optimal EXT formulation. As a result, a formulation of antidiabetic drugs was set up, and meanwhile a strategy using synergistic excipients to adjust release profiles of peptides from hydrogels was put forward.
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Affiliation(s)
- Kun Li
- National Pharmaceutical Engineering Research Center, China State Institute of Pharmaceutical Industry, Shanghai 200437, China
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195
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Schmidt S, Volodkin D. Microparticulate biomolecules by mild CaCO3templating. J Mater Chem B 2013; 1:1210-1218. [DOI: 10.1039/c2tb00344a] [Citation(s) in RCA: 62] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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196
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Freiherr J, Hallschmid M, Frey WH, Brünner YF, Chapman CD, Hölscher C, Craft S, De Felice FG, Benedict C. Intranasal insulin as a treatment for Alzheimer's disease: a review of basic research and clinical evidence. CNS Drugs 2013; 27:505-14. [PMID: 23719722 PMCID: PMC3709085 DOI: 10.1007/s40263-013-0076-8] [Citation(s) in RCA: 343] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
Research in animals and humans has associated Alzheimer's disease (AD) with decreased cerebrospinal fluid levels of insulin in combination with decreased insulin sensitivity (insulin resistance) in the brain. This phenomenon is accompanied by attenuated receptor expression of insulin and insulin-like growth factor, enhanced serine phosphorylation of insulin receptor substrate-1, and impaired transport of insulin across the blood-brain barrier. Moreover, clinical trials have demonstrated that intranasal insulin improves both memory performance and metabolic integrity of the brain in patients suffering from AD or its prodrome, mild cognitive impairment. These results, in conjunction with the finding that insulin mitigates hippocampal synapse vulnerability to beta amyloid, a peptide thought to be causative in the development of AD, provide a strong rationale for hypothesizing that pharmacological strategies bolstering brain insulin signaling, such as intranasal administration of insulin, could have significant potential in the treatment and prevention of AD. With this view in mind, the review at hand will present molecular mechanisms potentially underlying the memory-enhancing and neuroprotective effects of intranasal insulin. Then, we will discuss the results of intranasal insulin studies that have demonstrated that enhancing brain insulin signaling improves memory and learning processes in both cognitively healthy and impaired humans. Finally, we will provide an overview of neuroimaging studies indicating that disturbances in insulin metabolism--such as insulin resistance in obesity, type 2 diabetes and AD--and altered brain responses to insulin are linked to decreased cerebral volume and especially to hippocampal atrophy.
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Affiliation(s)
- Jessica Freiherr
- Department of Diagnostic and Interventional Neuroradiology, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany.
| | - Manfred Hallschmid
- Department of Medical Psychology and Behavioral Neurobiology, University of Tübingen, Tübingen, Germany ,Institute for Diabetes Research and Metabolic Diseases of the Helmholtz Centre Munich at the University of Tübingen (Paul Langerhans Institute Tübingen), Tübingen, Germany
| | - William H. Frey
- Alzheimer’s Research Center of the HealthPartner’s Center for Memory and Aging, St. Paul, MN USA
| | - Yvonne F. Brünner
- Department of Diagnostic and Interventional Neuroradiology, RWTH Aachen University, Pauwelsstr. 30, 52074 Aachen, Germany
| | | | | | - Suzanne Craft
- J. Paul Sticht Center on Aging, Department of Medicine, Wake Forest University School of Medicine, Winston-Salem, NC USA
| | - Fernanda G. De Felice
- Institute of Biochemistry, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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197
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Oral insulin delivery by self-assembled chitosan nanoparticles: In vitro and in vivo studies in diabetic animal model. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2013; 33:376-82. [DOI: 10.1016/j.msec.2012.09.001] [Citation(s) in RCA: 127] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/14/2012] [Revised: 07/28/2012] [Accepted: 09/03/2012] [Indexed: 01/23/2023]
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Abstract
Conopeptides from the venoms of marine snails have attracted much interest as leads in drug design. Currently, one drug, Prialt(®), is on the market as a treatment for chronic neuropathic pain. Conopeptides target a range of ion channels, receptors and transporters, and are typically small, relatively stable peptides that are generally amenable to production using solid-phase peptide synthesis. With only a small fraction of the predicted diversity of conopeptides examined so far, these peptides represent an exciting and largely untapped resource for drug discovery. Recent efforts at chemically re-engineering conopeptides to improve their biopharmaceutical properties promise to accelerate the translation of these fascinating marine peptides to the clinic.
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Mukhopadhyay P, Mishra R, Rana D, Kundu PP. Strategies for effective oral insulin delivery with modified chitosan nanoparticles: A review. Prog Polym Sci 2012. [DOI: 10.1016/j.progpolymsci.2012.04.004] [Citation(s) in RCA: 148] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Araújo F, Fonte P, Santos HA, Sarmento B. Oral delivery of glucagon-like peptide-1 and analogs: alternatives for diabetes control? J Diabetes Sci Technol 2012; 6:1486-97. [PMID: 23294796 PMCID: PMC3570891 DOI: 10.1177/193229681200600630] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Type 2 diabetes mellitus (T2DM) is one of the most prevalent diseases worldwide. Current treatments are often associated with off-target effects and do not significantly impact disease progression. New therapies are therefore urgently needed to overcome this social burden. Glucagon-like peptide-1 (GLP-1), an incretin hormone, has been used to control T2DM symptomatology. However, the administration of peptide or proteins drugs is still a huge challenge in the pharmaceutical field, requiring administration by parenteral routes. This article reviews the main hurdles in oral administration of GLP-1 and focuses on the strategies utilized to overcome them.
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Affiliation(s)
- Francisca Araújo
- Department of Pharmaceutical Sciences, Centro de Investigação em Ciências da Saúde, Health Sciences Research Center,Instituto Superior de Ciências da Saúde, CESPU, Gandra, Portugal
- Instituto de Engenharia Biomédica, University of Porto, Porto, Portugal
| | - Pedro Fonte
- Department of Pharmaceutical Sciences, Centro de Investigação em Ciências da Saúde, Health Sciences Research Center,Instituto Superior de Ciências da Saúde, CESPU, Gandra, Portugal
- Department of Chemistry, Faculty of Pharmacy, REQUIMTE, University of Porto, Porto, Portugal
| | - Hélder A. Santos
- Division of Pharmaceutical Technology, Faculty of Pharmacy, University of Helsinki, Helsinki, Finland
| | - Bruno Sarmento
- Department of Pharmaceutical Sciences, Centro de Investigação em Ciências da Saúde, Health Sciences Research Center,Instituto Superior de Ciências da Saúde, CESPU, Gandra, Portugal
- Instituto de Engenharia Biomédica, University of Porto, Porto, Portugal
- Department of Pharmaceutical Technology, Faculty of Pharmacy, University of Porto, Porto, Portugal
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