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Benalaya I, Alves G, Lopes J, Silva LR. A Review of Natural Polysaccharides: Sources, Characteristics, Properties, Food, and Pharmaceutical Applications. Int J Mol Sci 2024; 25:1322. [PMID: 38279323 PMCID: PMC10816883 DOI: 10.3390/ijms25021322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2023] [Revised: 01/08/2024] [Accepted: 01/14/2024] [Indexed: 01/28/2024] Open
Abstract
Natural polysaccharides, which are described in this study, are some of the most extensively used biopolymers in food, pharmaceutical, and medical applications, because they are renewable and have a high level of biocompatibility and biodegradability. The fundamental understanding required to properly exploit polysaccharides potential in the biocomposite, nanoconjugate, and pharmaceutical industries depends on detailed research of these molecules. Polysaccharides are preferred over other polymers because of their biocompatibility, bioactivity, homogeneity, and bioadhesive properties. Natural polysaccharides have also been discovered to have excellent rheological and biomucoadhesive properties, which may be used to design and create a variety of useful and cost-effective drug delivery systems. Polysaccharide-based composites derived from natural sources have been widely exploited due to their multifunctional properties, particularly in drug delivery systems and biomedical applications. These materials have achieved global attention and are in great demand because to their biochemical properties, which mimic both human and animal cells. Although synthetic polymers account for a substantial amount of organic chemistry, natural polymers play a vital role in a range of industries, including biomedical, pharmaceutical, and construction. As a consequence, the current study will provide information on natural polymers, their biological uses, and food and pharmaceutical applications.
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Affiliation(s)
- Ikbel Benalaya
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, 6201-001 Covilha, Portugal; (I.B.); (G.A.)
| | - Gilberto Alves
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, 6201-001 Covilha, Portugal; (I.B.); (G.A.)
| | - João Lopes
- iMed.ULisboa, Research Institute for Medicines, Faculdade de Farmácia, University of Lisboa, 1649-003 Lisbon, Portugal
| | - Luís R. Silva
- CICS-UBI—Health Sciences Research Centre, University of Beira Interior, 6201-001 Covilha, Portugal; (I.B.); (G.A.)
- CPIRN-UDI/IPG, Center of Potential and Innovation of Natural Resources, Research Unit for Inland Development (UDI), Polytechnic Institute of Guarda, 6300-559 Guarda, Portugal
- CIEPQPF, Department of Chemical Engineering, Pólo II—Pinhal de Marrocos, University of Coimbra, 3030-790 Coimbra, Portugal
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Reynaldo JR, Novack KM, Sousa LRD, Vieira PMDA, Amparo TR, de Souza GHB, Teixeira LFM, Barboza APM, Neves BRA, Alvarenga ME, Martins FT, dos Santos VMR. Evaluation of Anti- Candida albicans Activity and Release of Ketoconazole in PMMA-G-PEG 4000 Films. Int J Mol Sci 2022; 23:10775. [PMID: 36142698 PMCID: PMC9504905 DOI: 10.3390/ijms231810775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2022] [Revised: 09/07/2022] [Accepted: 09/08/2022] [Indexed: 11/16/2022] Open
Abstract
Modified release systems depend on the selection of an appropriate agent capable of controlling the release of the drug, sustaining the therapeutic action over time, and/or releasing the drug at the level of a particular tissue or target organ. Polyethylene glycol 4000 (PEG 4000) is commonly employed in drug release formulations while polymethyl methacrylate (PMMA) is non-toxic and has a good solubility in organic solvents. This study aimed at the incorporation of ketoconazole in PMMA-g-PEG 4000 and its derivatives, thus evaluating its release profile and anti-Candida albicans and cytotoxic activities. Ketoconazole was characterized and incorporated into the copolymers. The ketoconazole incorporated in the copolymer and its derivatives showed an immediate release profile. All copolymers with ketoconazole showed activity against Candida albicans and were non-toxic to human cells in the entire concentration tested.
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Affiliation(s)
- Juliana Ribeiro Reynaldo
- Department of Chemistry, Federal University of Ouro Preto (UFOP), Ouro Preto 35400-000, MG, Brazil
| | - Kátia Monteiro Novack
- Department of Chemistry, Federal University of Ouro Preto (UFOP), Ouro Preto 35400-000, MG, Brazil
| | - Lucas Resende Dutra Sousa
- Laboratory of Morphopathology, Center for Research in Biological Sciences, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro Campus, Ouro Preto 35400-000, MG, Brazil
| | - Paula Melo de Abreu Vieira
- Laboratory of Morphopathology, Center for Research in Biological Sciences, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro Campus, Ouro Preto 35400-000, MG, Brazil
| | - Tatiane Roquete Amparo
- Postgraduate Program in Pharmaceutical Science, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro Campus, Ouro Preto 35400-000, MG, Brazil
| | - Gustavo Henrique Bianco de Souza
- Postgraduate Program in Pharmaceutical Science, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro Campus, Ouro Preto 35400-000, MG, Brazil
| | - Luiz Fernando Medeiros Teixeira
- Postgraduate Program in Pharmaceutical Science, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro Campus, Ouro Preto 35400-000, MG, Brazil
| | - Ana Paula Moreira Barboza
- Physics Department, Federal University of Ouro Preto (UFOP), Morro do Cruzeiro Campus, Ouro Preto 35400-000, MG, Brazil
| | | | - Meiry Edivirges Alvarenga
- Institute of Chemistry, Federal University of Goiás (UFG), Samambaia Campus, Goiânia 74690-900, GO, Brazil
| | - Felipe Terra Martins
- Institute of Chemistry, Federal University of Goiás (UFG), Samambaia Campus, Goiânia 74690-900, GO, Brazil
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Voronin DV, Abalymov AA, Svenskaya YI, Lomova MV. Key Points in Remote-Controlled Drug Delivery: From the Carrier Design to Clinical Trials. Int J Mol Sci 2021; 22:9149. [PMID: 34502059 PMCID: PMC8430748 DOI: 10.3390/ijms22179149] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/19/2021] [Revised: 08/12/2021] [Accepted: 08/23/2021] [Indexed: 12/12/2022] Open
Abstract
The increased research activity aiming at improved delivery of pharmaceutical molecules indicates the expansion of the field. An efficient therapeutic delivery approach is based on the optimal choice of drug-carrying vehicle, successful targeting, and payload release enabling the site-specific accumulation of the therapeutic molecules. However, designing the formulation endowed with the targeting properties in vitro does not guarantee its selective delivery in vivo. The various biological barriers that the carrier encounters upon intravascular administration should be adequately addressed in its overall design to reduce the off-target effects and unwanted toxicity in vivo and thereby enhance the therapeutic efficacy of the payload. Here, we discuss the main parameters of remote-controlled drug delivery systems: (i) key principles of the carrier selection; (ii) the most significant physiological barriers and limitations associated with the drug delivery; (iii) major concepts for its targeting and cargo release stimulation by external stimuli in vivo. The clinical translation for drug delivery systems is also described along with the main challenges, key parameters, and examples of successfully translated drug delivery platforms. The essential steps on the way from drug delivery system design to clinical trials are summarized, arranged, and discussed.
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Affiliation(s)
- Denis V. Voronin
- Science Medical Center, Saratov State University, Astrakhanskaya St. 83, 410012 Saratov, Russia; (A.A.A.); (Y.I.S.); (M.V.L.)
- Department of Physical and Colloid Chemistry, National University of Oil and Gas “Gubkin University”, Leninsky Prospekt 65, 119991 Moscow, Russia
| | - Anatolii A. Abalymov
- Science Medical Center, Saratov State University, Astrakhanskaya St. 83, 410012 Saratov, Russia; (A.A.A.); (Y.I.S.); (M.V.L.)
| | - Yulia I. Svenskaya
- Science Medical Center, Saratov State University, Astrakhanskaya St. 83, 410012 Saratov, Russia; (A.A.A.); (Y.I.S.); (M.V.L.)
| | - Maria V. Lomova
- Science Medical Center, Saratov State University, Astrakhanskaya St. 83, 410012 Saratov, Russia; (A.A.A.); (Y.I.S.); (M.V.L.)
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Kala SG, Chinni S. Development and Characterization of Venetoclax Nanocrystals for Oral Bioavailability Enhancement. AAPS PharmSciTech 2021; 22:92. [PMID: 33683477 DOI: 10.1208/s12249-021-01968-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Accepted: 02/18/2021] [Indexed: 12/12/2022] Open
Abstract
Venetoclax (VX) used in the treatment of chronic lymphocytic leukemia possesses low oral bioavailability (5.4%) and undergoes first-pass metabolism. Development of a formulation to overcome its bioavailability problem can be done by using nanocrystals which has many scientific applications. Nanocrystals of VX were formulated using amalgamation of precipitation and high-pressure homogenization method, in which polyvinyl alcohol (PVA) was selected as stabilizer. Process parameters like concentration of stabilizer, homogenization pressure, number of homogenization cycle, and concentration of lyoprotectant were optimized to obtain the desired particle size for the preparation of nanocrystal formulation. HPLC methods were developed and validated in-house for determination of in vitro dissolution data and in vivo bioavailability data. Physicochemical characterization was done to determine the particle size (zeta sizer), crystalline nature (DSC and XRPD), solubility (shaker bath), and dissolution (USP type 2 apparatus). Lyophilized VX nanocrystals of size less than 350 nm showed substantial increase in saturation solubility (~20 folds) and dissolution in comparison with free VX. In vitro release study revealed that 100% dissolution was achieved in 120 min as compared to VX free base which is having less than 43.5% dissolution in 120 min. Formulations of VX remain stable for 6 months under accelerated stability conditions. In vivo pharmacokinetic data in male Sprague-Dawley rats showed (~2.02 folds) significant increase in oral bioavailability of VX formulation as compared to free drug because of rapid dissolution and absorption which makes the nanocrystal formulation a better approach for oral administration of poorly soluble drugs.
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Lach G, Schellekens H, Dinan TG, Cryan JF. Anxiety, Depression, and the Microbiome: A Role for Gut Peptides. Neurotherapeutics 2018; 15:36-59. [PMID: 29134359 PMCID: PMC5794698 DOI: 10.1007/s13311-017-0585-0] [Citation(s) in RCA: 315] [Impact Index Per Article: 52.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
The complex bidirectional communication between the gut and the brain is finely orchestrated by different systems, including the endocrine, immune, autonomic, and enteric nervous systems. Moreover, increasing evidence supports the role of the microbiome and microbiota-derived molecules in regulating such interactions; however, the mechanisms underpinning such effects are only beginning to be resolved. Microbiota-gut peptide interactions are poised to be of great significance in the regulation of gut-brain signaling. Given the emerging role of the gut-brain axis in a variety of brain disorders, such as anxiety and depression, it is important to understand the contribution of bidirectional interactions between peptide hormones released from the gut and intestinal bacteria in the context of this axis. Indeed, the gastrointestinal tract is the largest endocrine organ in mammals, secreting dozens of different signaling molecules, including peptides. Gut peptides in the systemic circulation can bind cognate receptors on immune cells and vagus nerve terminals thereby enabling indirect gut-brain communication. Gut peptide concentrations are not only modulated by enteric microbiota signals, but also vary according to the composition of the intestinal microbiota. In this review, we will discuss the gut microbiota as a regulator of anxiety and depression, and explore the role of gut-derived peptides as signaling molecules in microbiome-gut-brain communication. Here, we summarize the potential interactions of the microbiota with gut hormones and endocrine peptides, including neuropeptide Y, peptide YY, pancreatic polypeptide, cholecystokinin, glucagon-like peptide, corticotropin-releasing factor, oxytocin, and ghrelin in microbiome-to-brain signaling. Together, gut peptides are important regulators of microbiota-gut-brain signaling in health and stress-related psychiatric illnesses.
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Affiliation(s)
- Gilliard Lach
- APC Microbiome Institute, University College Cork, Cork, Ireland
| | - Harriet Schellekens
- APC Microbiome Institute, University College Cork, Cork, Ireland
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
- Food for Health Ireland, University College Cork, Cork, Ireland
| | - Timothy G Dinan
- APC Microbiome Institute, University College Cork, Cork, Ireland
- Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland
| | - John F Cryan
- APC Microbiome Institute, University College Cork, Cork, Ireland.
- Food for Health Ireland, University College Cork, Cork, Ireland.
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Yin L, Yuvienco C, Montclare JK. Protein based therapeutic delivery agents: Contemporary developments and challenges. Biomaterials 2017; 134:91-116. [PMID: 28458031 DOI: 10.1016/j.biomaterials.2017.04.036] [Citation(s) in RCA: 68] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2017] [Revised: 04/18/2017] [Accepted: 04/21/2017] [Indexed: 12/15/2022]
Abstract
As unique biopolymers, proteins can be employed for therapeutic delivery. They bear important features such as bioavailability, biocompatibility, and biodegradability with low toxicity serving as a platform for delivery of various small molecule therapeutics, gene therapies, protein biologics and cells. Depending on size and characteristic of the therapeutic, a variety of natural and engineered proteins or peptides have been developed. This, coupled to recent advances in synthetic and chemical biology, has led to the creation of tailor-made protein materials for delivery. This review highlights strategies employing proteins to facilitate the delivery of therapeutic matter, addressing the challenges for small molecule, gene, protein and cell transport.
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Affiliation(s)
- Liming Yin
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY 11201, United States
| | - Carlo Yuvienco
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY 11201, United States
| | - Jin Kim Montclare
- Department of Chemical and Biomolecular Engineering, NYU Tandon School of Engineering, Brooklyn, NY 11201, United States; Department of Chemistry, New York University, New York, NY 10003, United States; Department of Biomaterials, NYU College of Dentistry, New York, NY 10010, United States; Department of Biochemistry, SUNY Downstate Medical Center, Brooklyn, NY 11203, United States.
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Dozie-Nwachukwu S, Danyuo Y, Obayemi J, Odusanya O, Malatesta K, Soboyejo W. Extraction and encapsulation of prodigiosin in chitosan microspheres for targeted drug delivery. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2017; 71:268-278. [DOI: 10.1016/j.msec.2016.09.078] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/12/2016] [Revised: 09/06/2016] [Accepted: 09/29/2016] [Indexed: 10/20/2022]
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Abstract
Physiological characteristics of diseases bring about both challenges and opportunities for targeted drug delivery. Various drug delivery platforms have been devised ranging from macro- to micro- and further into the nanoscopic scale in the past decades. Recently, the favorable physicochemical properties of nanomaterials, including long circulation, robust tissue and cell penetration attract broad interest, leading to extensive studies for therapeutic benefits. Accumulated knowledge about the physiological barriers that affect the in vivo fate of nanomedicine has led to more rational guidelines for tailoring the nanocarriers, such as size, shape, charge, and surface ligands. Meanwhile, progresses in material chemistry and molecular pharmaceutics generate a panel of physiological stimuli-responsive modules that are equipped into the formulations to prepare “smart” drug delivery systems. The capability of harnessing physiological traits of diseased tissues to control the accumulation of or drug release from nanomedicine has further improved the controlled drug release profiles with a precise manner. Successful clinical translation of a few nano-formulations has excited the collaborative efforts from the research community, pharmaceutical industry, and the public towards a promising future of smart drug delivery.
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Affiliation(s)
- Wujin Sun
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina; Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Quanyin Hu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina; Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Wenyan Ji
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina; Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Grace Wright
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina; Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
| | - Zhen Gu
- Joint Department of Biomedical Engineering, University of North Carolina at Chapel Hill and North Carolina State University, Raleigh, North Carolina; Division of Molecular Pharmaceutics and Center for Nanotechnology in Drug Delivery, Eshelman School of Pharmacy, University of North Carolina at Chapel Hill, Chapel Hill, North Carolina; and Department of Medicine, University of North Carolina School of Medicine, Chapel Hill, North Carolina
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Czaplewska JA, Majdanski TC, Barthel MJ, Gottschaldt M, Schubert US. Functionalized PEG-b-PAGE-b-PLGA triblock terpolymers as materials for nanoparticle preparation. ACTA ACUST UNITED AC 2015. [DOI: 10.1002/pola.27674] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Affiliation(s)
- Justyna A. Czaplewska
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
| | - Tobias C. Majdanski
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
| | - Markus J. Barthel
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
- Dutch Polymer Institute (DPI); John F. Kennedylaan 2 5612 AB Eindhoven The Netherlands
| | - Michael Gottschaldt
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
| | - Ulrich S. Schubert
- Laboratory of Organic and Macromolecular Chemistry (IOMC); Friedrich Schiller University Jena; Humboldtstr. 10 07743 Jena Germany
- Jena Center for Soft Matter (JCSM); Friedrich Schiller University Jena; Philosophenweg 7 07743 Jena Germany
- Dutch Polymer Institute (DPI); John F. Kennedylaan 2 5612 AB Eindhoven The Netherlands
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Moritz M, Geszke-Moritz M. Mesoporous materials as multifunctional tools in biosciences: Principles and applications. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2015; 49:114-151. [DOI: 10.1016/j.msec.2014.12.079] [Citation(s) in RCA: 105] [Impact Index Per Article: 11.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 12/09/2014] [Indexed: 12/17/2022]
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Abstract
INTRODUCTION Preformulation assists scientists in screening lead candidates based on their physicochemical and biopharmaceutical properties. This data is useful for selection of new chemical entities (NCEs) for preclinical efficacy/toxicity studies which is a major section under investigational new drug application. A strong collaboration between discovery and formulation group is essential for selecting right NCEs in order to reduce attrition rate in the late stage development. AREAS COVERED This article describes the significance of preformulation research in drug discovery and development. Various crucial preformulation parameters with case studies have been discussed. EXPERT OPINION Physicochemical and biopharmaceutical characterization of NCEs is a decisive parameter during product development. Early prediction of these properties helps in selecting suitable physical form (salt, polymorph, etc.) of the candidate. Based on pharmacokinetic and efficacy/toxicity studies, suitable formulation for Phase I clinical studies can be developed. Overall these activities contribute in streamlining efficacy/toxicology evaluation, allowing pharmacologically effective and developable molecules to reach the clinic and eventually to the market. In this review, the magnitude of understanding preformulation properties of NCEs and their utility in product development has been elaborated with case studies.
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Devadasu VR, Bhardwaj V, Kumar MNVR. Can controversial nanotechnology promise drug delivery? Chem Rev 2012; 113:1686-735. [PMID: 23276295 DOI: 10.1021/cr300047q] [Citation(s) in RCA: 159] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Venkat Ratnam Devadasu
- Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, Glasgow G4 0RE, United Kingdom
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Liu M, Gan L, Chen L, Xu Z, Zhu D, Hao Z, Chen L. Supramolecular core-shell nanosilica@liposome nanocapsules for drug delivery. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2012; 28:10725-10732. [PMID: 22746205 DOI: 10.1021/la3021645] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The fabrication of core-shell structural nanosilica@liposome nanocapsules as a drug delivery vehicle is reported. SiO(2) nanoparticles are encapsulated within liposomes by a W/O/W emulsion approach to form supramolecular assemblies with a core of colloidal particles enveloped by a lipid bilayer shell. A nanosilica core provides charge compensation and architectural support for the lipid bilayer, which significantly improves their physical stability. A preliminary application of these core-shell nanocapsules for hemoglobin (Hb) delivery is described. Through the H-bonding interaction between the hydroxyl groups on nanosilicas and the amino nitrogens of Hb, Hb-SiO(2) nanocomplexes in which the saturated adsorption amount of Hb on SiO(2) is 0.47 g g(-1) are coated with lipids to generate core-shell Hb-SiO(2)@liposome nanocapsules with mean diameters of 60-500 nm and Hb encapsulation efficiency of 48.4-87.9%. Hb-SiO(2)@liposome supramolecular nanovehicles create a mode of delivery that stabilizes the encapsulated Hb and achieves long-lasting release, thereby improving the efficacy of the drug. Compared with liposome-encapsulated Hb and Hb-loaded SiO(2) particles, such core-shell nanovehicles show substantially enhanced release performance of Hb in vitro. This finding opens up a new window of liposome-based formulations as drug delivery nanovehicles for widespread pharmaceutical applications.
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Affiliation(s)
- Mingxian Liu
- Department of Chemistry, Tongji University, 1239 Siping Road, Shanghai 200092, PR China
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Kabilan S, Ayyasamy M, Jayavel S, Paramasamy G. Pseudomonas sp. as a Source of Medium Chain Length Polyhydroxyalkanoates for Controlled Drug Delivery: Perspective. Int J Microbiol 2012; 2012:317828. [PMID: 22518140 PMCID: PMC3299479 DOI: 10.1155/2012/317828] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2011] [Accepted: 10/27/2011] [Indexed: 01/21/2023] Open
Abstract
Controlled drug delivery technology represents one of the most rapidly advancing areas of science. They offer numerous advantages compared to conventional dosage forms including improved efficacy, reduced toxicity, improved patient compliance and convenience. Over the past several decades, many delivery tools or methods were developed such as viral vector, liposome-based delivery system, polymer-based delivery system, and intelligent delivery system. Recently, nonviral vectors, especially those based on biodegradable polymers, have been widely investigated as vectors. Unlike the other polymers tested, polyhydroxyalkanoates (PHAs) have been intensively investigated as a family of biodegradable and biocompatible materials for in vivo applications as implantable tissue engineering material as well as release vectors for various drugs. On the other hand, the direct use of these polyesters has been hampered by their hydrophobic character and some physical shortcomings, while its random copolymers fulfilled the expectation of biomedical researchers by exhibiting significant mechanical and thermal properties. This paper reviews the strategies adapted to make functional polymer to be utilized as delivery system.
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Affiliation(s)
- Sujatha Kabilan
- UGC-Networking Resource Centre in Biological Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, India
| | - Mahalakshmi Ayyasamy
- UGC-Networking Resource Centre in Biological Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, India
| | - Sridhar Jayavel
- UGC-Networking Resource Centre in Biological Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, India
| | - Gunasekaran Paramasamy
- UGC-Networking Resource Centre in Biological Sciences, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, India
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Liu M, Chen L, Zhao Y, Gan L, Zhu D, Xiong W, Lv Y, Xu Z, Hao Z, Chen. L. Preparation, characterization and properties of liposome-loaded polycaprolactone microspheres as a drug delivery system. Colloids Surf A Physicochem Eng Asp 2012. [DOI: 10.1016/j.colsurfa.2011.12.017] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/14/2022]
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Locatelli M, Governatori L, Carlucci G, Genovese S, Mollica A, Epifano F. Recent application of analytical methods to phase I and phase II drugs development: a review. Biomed Chromatogr 2011; 26:283-300. [DOI: 10.1002/bmc.1674] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2011] [Revised: 06/13/2011] [Accepted: 06/15/2011] [Indexed: 11/11/2022]
Affiliation(s)
- Marcello Locatelli
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Luciana Governatori
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Giuseppe Carlucci
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Salvatore Genovese
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Adriano Mollica
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
| | - Francesco Epifano
- Dipartimento di Scienze del Farmaco; Università degli Studi ‘G. D'Annunzio’ Chieti-Pescara; Via dei Vestini 31; 66100; Chieti (CH); Italy
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Pippa N, Demetzos C, Danezis E. The formalism of fractal aggregation phenomena of colloidal drug delivery systems. J Liposome Res 2011; 22:55-61. [DOI: 10.3109/08982104.2011.590142] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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19
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Raval A, Parikh J, Engineer C. Mechanism of controlled release kinetics from medical devices. BRAZILIAN JOURNAL OF CHEMICAL ENGINEERING 2010. [DOI: 10.1590/s0104-66322010000200001] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Affiliation(s)
- A. Raval
- Sardar Vallabhbhai National Institute of Technology, India
| | - J. Parikh
- Sardar Vallabhbhai National Institute of Technology, India
| | - C. Engineer
- Sahajanand Medical Technologies Pvt. Ltd., India
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20
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Biomolecular Structure and Modeling: Historical Perspective. INTERDISCIPLINARY APPLIED MATHEMATICS 2010. [PMCID: PMC7124002 DOI: 10.1007/978-1-4419-6351-2_1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 11/01/2022]
Abstract
physics, chemistry, and biology have been connected by a web of causal explanation organized by induction-based theories that telescope into one another. … Thus, quantum theory underlies atomic physics, which is the foundation of reagent chemistry and its specialized offshoot biochemistry, which interlock with molecular biology — essentially, the chemistry of organic macromolecules — and hence, through successively higher levels of organization, cellular, organismic, and evolutionary biology. … Such is the unifying and highly productive understanding of the world that has evolved in the natural sciences.
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21
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Lee J, Lee KY. Injectable microsphere/hydrogel combination systems for localized protein delivery. Macromol Biosci 2009; 9:671-6. [PMID: 19226561 DOI: 10.1002/mabi.200800317] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Injectable delivery systems for therapeutic proteins (e.g., hydrogels and microspheres) have attracted wide attention. Hydrogels, however, may release their hydrophilic contents too rapidly in a large initial burst, and phagocytes may clear microspheres within a relatively short time period after administration. We hypothesized that microsphere/hydrogel combination systems could achieve a controlled and sustained release of proteins as an injectable delivery system. To test this hypothesis, we prepared PLGA microspheres containing a model protein and mixed these with alginate gels. The mixing ratio of the components was the primary controlling parameter of the protein release. This approach could be useful for development of injectable and localized drug delivery systems.
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Affiliation(s)
- Jangwook Lee
- Department of Bioengineering, Hanyang University, Seoul 133-791, Republic of Korea
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22
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PLGA Nanoparticles Stabilized with Cationic Surfactant: Safety Studies and Application in Oral Delivery of Paclitaxel to Treat Chemical-Induced Breast Cancer in Rat. Pharm Res 2009; 26:2495-503. [DOI: 10.1007/s11095-009-9965-4] [Citation(s) in RCA: 116] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/27/2009] [Accepted: 08/21/2009] [Indexed: 02/05/2023]
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23
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Stellmach JA. The influences of the structure and activity of biologically active compounds on the assessment of inventive step. WORLD PATENT INFORMATION 2009. [DOI: 10.1016/j.wpi.2008.12.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Oliveira ÉDFS, Azevedo RDCP, Bonfilio R, Oliveira DBD, Ribeiro GP, Araújo MBD. Dissolution test optimization for meloxicam in the tablet pharmaceutical form. BRAZ J PHARM SCI 2009. [DOI: 10.1590/s1984-82502009000100008] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022] Open
Abstract
Meloxicam is a broadly used drug in the therapeutics for the osteoarthritis and rheumatoid arthritis treatments in adults, and it is available in the Brazilian market, as tablet and capsule pharmaceutical forms. The present work aimed to establish conditions for accomplishment of the dissolution test of 15 mg meloxicam tablets (A and B test products), compared with the reference product, since there is no monograph about dissolution assays for meloxicam in official summaries. To optimize the conditions several parameters were tested and, according to obtained results, the use of pH 7.5 phosphate buffer (900mL, at 37 ± 0.5ºC) as dissolution medium, paddle method (apparatus 2), stirring speed of the dissolution medium at 100 rpm and collect time of 60 minutes were considered satisfactory. The samples were quantified by UV spectrophotometric method at 362 nm. The products presented kinetics of first-order. Dissolution efficiency values were of 83.25, 83.73 and 88.10% for the A, B and reference products, respectively. Factors f1 and f2 were calculated and similarity of the tested medicines was demonstrated. The dissolution test was validated presenting selectivity, linearity, precision and accuracy within of the acceptance criteria.
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25
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Sibeko B, Pillay V, Choonara YE, Khan RA, Modi G, Iyuke SE, Naidoo D, Danckwerts MP. Computational molecular modeling and structural rationalization for the design of a drug-loaded PLLA/PVA biopolymeric membrane. Biomed Mater 2008; 4:015014. [DOI: 10.1088/1748-6041/4/1/015014] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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26
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Cavallaro G, Pierro P, Palumbo FS, Testa F, Pasqua L, Aiello R. Drug Delivery Devices Based on Mesoporous Silicate. Drug Deliv 2008; 11:41-6. [PMID: 15168790 DOI: 10.1080/10717540490265252] [Citation(s) in RCA: 90] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022] Open
Abstract
A mesoporous material based on aluminosilicate mixture was studied to investigate its ability to include drugs and then release them. Nonsteroidal anti-inflammatory agents such as diflunisal, naproxen, ibuprofen and its sodium salt have been used in this study. The preparation of the mesoporous material and its characterization by X-ray, N2 absorption-desorption isotherm, and thermogravimetry analysis have been described. Drug loading was performed by a soaking procedure. Drug-loaded matrices were characterized for entrapped drug amount, water absorption ability, and thermogravimetric behavior. Drug release studies also were performed at pH 1.1 and 6.8 mimicking gastrointestinal fluids. Experimental results showed that this type of matrix is able to trap the bioactive agents by a soaking procedure and, then, to release them in conditions mimicking the biological fluids. Also, the high affinity of these matrices for water makes them potentially biocompatible. Release data suggest that the matrix impregnated with diflunisal offers good potential as a system for the modified drug release.
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27
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Powell HM, Ayodeji O, Summerfield TL, Powell DM, Kniss DA, Tomasko DL, Lannutti JJ. Chemotherapeutic implants via subcritical CO2 modification. Biomaterials 2007; 28:5562-9. [PMID: 17888509 DOI: 10.1016/j.biomaterials.2007.09.004] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2007] [Accepted: 09/02/2007] [Indexed: 11/25/2022]
Abstract
Polymer-based biomaterials have a broad range of current applications in medicine. Many implants generate a favorable biomedical outcome solely by providing short-term mechanical stability that allows healing of the surrounding tissues. An example is polymeric reconstructive resorbable plates having initial strengths sufficient to stabilize bone segments while allowing the osteosynthesis needed to restore original function following tumor resection. Simultaneous, localized delivery of the widely employed chemotherapeutic paclitaxel following tumor removal presents a particularly desirable goal in this context. By using compressed/subcritical CO(2) at moderate pressures (as opposed to the more familiar supercritical pressures) to embed paclitaxel in clinically utilized reconstructive plating, the form of the implant can be preserved while adding an inherently localized chemotherapeutic function. In vitro tests demonstrate the efficacy of the embedded paclitaxel against adherent MCF-7 breast cancer cells within the immediate area of the polylactic acid (PLA). CO(2) can be utilized to add dual structural-chemotherapeutic function to polymeric surfaces without a change in form. The ability to 'piggyback' chemotherapeutic function into nearly any polymeric surface should find widespread utility.
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Affiliation(s)
- Heather M Powell
- Department of Materials Science and Engineering, Ohio State University, Columbus, OH 43210, USA
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28
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Rathore R, Jain JP, Srivastava A, Jachak SM, Kumar N. Simultaneous determination of hydrazinocurcumin and phenol red in samples from rat intestinal permeability studies: HPLC method development and validation. J Pharm Biomed Anal 2007; 46:374-80. [PMID: 17988818 DOI: 10.1016/j.jpba.2007.09.019] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2007] [Revised: 09/18/2007] [Accepted: 09/19/2007] [Indexed: 10/22/2022]
Abstract
Hydrazinocurcumin (HZC) is a patented multiactivity compound and is a potent derivative of curcumin which is not yet explored for further development as formulation and requires the determination of biopharmaceutical suitability of the molecule. Intestinal permeability and logP of a compound are two vital biopharmaceutical properties by which, any "hit" molecule proceeds towards NCE (new chemical entity) and govern formulation design of bioactive molecules. In this report, a simple, precise and accurate isocratic reverse phase (RP) liquid chromatography method for simultaneous analysis of HZC and phenol red, for the application in rat in situ single-pass intestinal perfusion (SPIP) was developed and validated using FDA bioanalytical guidelines. RP-HPLC method was developed on C-18 column with UV detection at 332 nm for both the compounds. Isocratic run with the mobile phase consisting of organic phase (methanol:acetonitrile:: 50:20 v/v) and water in the ratio of 80:20 v/v provided a short run time of 7 min with resolution of more then two without interference of blank matrix. The working/expected concentration range for HZC and phenol red were 0.5-50 and 2-200 microg/ml. LOQs for HZC and phenol red of the method was found to be 0.167 and 0.271 microg/ml respectively. The validation parameters indicate that method was suitable for the intended purpose. Permeability, considering water flux with the help of non-permeable marker phenol red was calculated to be 0.34 x 10(-4)cm/s. Along with other descriptors, logP (1.78) and MW (<500) of HZC makes it a potential candidate for oral formulation.
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Affiliation(s)
- Rajesh Rathore
- Department of Pharmaceutics, National Institute of Pharmaceutical Education & Research, Sector 67, S A S Nagar, Mohali 160062, India
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29
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Silva GA, Ducheyne P, Reis RL. Materials in particulate form for tissue engineering. 1. Basic concepts. J Tissue Eng Regen Med 2007; 1:4-24. [DOI: 10.1002/term.2] [Citation(s) in RCA: 89] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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30
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Varma MVS, Perumal OP, Panchagnula R. Functional role of P-glycoprotein in limiting peroral drug absorption: optimizing drug delivery. Curr Opin Chem Biol 2006; 10:367-73. [PMID: 16814593 DOI: 10.1016/j.cbpa.2006.06.015] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2006] [Accepted: 06/16/2006] [Indexed: 01/16/2023]
Abstract
P-glycoprotein (P-gp) associated multi-drug resistance is one of the major challenges in the chemotherapy of various cancers. On the other hand, it is now widely recognized that P-gp influences drug transport across various biological membranes. To this end, there is an increasing trend to optimize pharmacokinetics and drug delivery right from the initial stages of drug discovery by exploring all the possible mechanisms involved in 'deliverability'. Recent advances in molecular biology techniques and biochemical characterization methodologies have helped in identification of various transporters involved in absorption or secretion of drugs. P-gp, an efflux pump expressed along the gastrointestinal tract, limits the permeability of many drugs and thus affects their peroral absorption and bioavailability. A fundamental insight and thorough understanding of P-gp and its functional role in limiting drug absorption is critical to improve predictability of dynamic absorption models and aid in selection of new candidates for development, and also widen the scope of peroral delivery for 'challenging' molecules.
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Affiliation(s)
- Manthena V S Varma
- Department of Pharmaceutics, College of Pharmacy, University of Minnesota, 308 Harvard Street SE, Minneapolis, MN 55455, USA
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31
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Neto CGT, Dantas TNC, Fonseca JLC, Pereira MR. Permeability studies in chitosan membranes. Effects of crosslinking and poly(ethylene oxide) addition. Carbohydr Res 2005; 340:2630-6. [PMID: 16202398 DOI: 10.1016/j.carres.2005.09.011] [Citation(s) in RCA: 42] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2005] [Revised: 09/13/2005] [Accepted: 09/14/2005] [Indexed: 11/29/2022]
Abstract
Pure chitosan, glutaraldehyde crosslinked chitosan, and a blend of chitosan with poly(ethylene oxide) (PEO) membranes were prepared. The three membranes were characterized in terms of their swelling capacities as well as their permeabilities to a drug model (sulfamerazine sodium salt). For the permeation experiments, the variables analyzed were the type of membrane and the initial drug concentration in the liquid phase (from 0.1% to 1.5%). Permeability coefficients were calculated using UV spectroscopy. The results showed that for the three analyzed membranes, the permeability did not change with time (over the studied time interval). An increase in the permeability for CHI/PEO membranes compared to those made of pure chitosan was also observed, possibly due to microporous region formation and/or crystallinity reduction. For the crosslinked membrane, an even higher increase in the permeability coefficient was observed. In this case, the increase was attributed to free volume variation.
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Affiliation(s)
- C G T Neto
- Departamento de Química, Universidade Federal do Rio Grande do Norte, Lagoa Nova, Natal, CP1662, RN 59078-970, Brazil
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32
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Varma MVS, Kaushal AM, Garg A, Garg S. Factors Affecting Mechanism and Kinetics of Drug Release from Matrix-Based Oral Controlled Drug Delivery Systems. ACTA ACUST UNITED AC 2004. [DOI: 10.2165/00137696-200402010-00003] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/02/2022]
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33
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Silva GA, Costa FJ, Neves NM, Reis RL. Microparticulate Release Systems Based on Natural Origin Materials. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2004; 553:283-300. [PMID: 15503464 DOI: 10.1007/978-0-306-48584-8_22] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/01/2023]
Affiliation(s)
- Gabriela A Silva
- 3B's Research Group--Biomaterials, Biodegradables, Biomimetics, University of Minho, Campus de Gualtar, 4710-057 Braga, Portugal
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34
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Cavagnaro JA. Preclinical safety evaluation of biotechnology-derived pharmaceuticals. Nat Rev Drug Discov 2002; 1:469-75. [PMID: 12119749 DOI: 10.1038/nrd822] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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35
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Sharma P, Chawla H, Panchagnula R. Analytical method for monitoring concentrations of cyclosporin and lovastatin in vitro in an everted rat intestinal sac absorption model. J Chromatogr B Analyt Technol Biomed Life Sci 2002; 768:349-59. [PMID: 11888063 DOI: 10.1016/s1570-0232(02)00005-3] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Cyclosporin A (CSA) and lovastatin (LV) are lipophilic drugs, which show poor and erratic absorption when administered perorally. The permeability of these compounds can be increased transiently by altering the membrane characteristics of the absorptive epithelium by the use of sorption promoters (SPs). In the present work a simple validated HPLC method utilizing an isocratic mobile phase with short retention times for CSA and LV was developed in order to monitor their concentrations in Kreb's Ringer bicarbonate (KRB) solution in vitro in intestinal sac absorption model. The same method was utilized to determine the apparent permeability coefficients and absorption profiles of CSA and LV by a modified Wilson-Wiseman method. Drugs were analysed by a reversed-phase HPLC method using a Shim-pack C18 column. An isocratic mobile phase containing acetonitrile and water in the proportions 70:30 and 80:20 was used for the HPLC analysis of CSA and LV, respectively. The flow-rate was 2 ml/min and quantitative determinations were carried out at 215 nm at 70 degrees C for CSA. In the case of LV the flow-rate was 1 ml/min and detection was done at 238 nm at 25 degrees C. The method was found to be specific as none of the proposed SPs, components of KRB or intestinal sac artefacts interfered with the drug peaks. Recovery studies and intra- and inter-day variations were within statistical limits. The limits of detection were 250 and 10 ng/ml and the limits of quantitation were 400 and 30 ng/ml for CSA and LV, respectively. The calibration curve was found to be linear in concentration range of 0.5-6 microg/ml for CSA and 0.05-0.4 microg/ml for LV. The proposed method was found to be rapid and selective and hence can be applied for continuous monitoring of CSA and LV in vitro in intestinal sac absorption studies.
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Affiliation(s)
- Pradeep Sharma
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Punjab, India
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Abstract
The discovery of insulin is one of the greatest milestones in medical history. This discovery revolutionized the use of peptides and proteins as therapeutic agents. For more than six decades, insulin from different animal sources was used, until the breakthrough in biotechnology made it possible to produce human insulin in sufficient amounts. The evolution of the biotechnological era gave rise to modified insulins to solve some of the bottlenecks in insulin therapy. Efforts are currently focused towards developing non-invasive insulin delivery systems, and there are several competing technologies in different stages of development. The next few years will see several novel approaches to mimic the endogenous release and kinetics of insulin, and also many improved analogues designed to achieve better control and effective treatment of diabetes.
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Affiliation(s)
- O Pillai
- Department of Pharmaceutics, National Institute of Pharmaceutical Education and Research (NIPER), Sector-67, Ph X, 160 062 Punjab, SAS Nagar, India
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