1
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Xu D, Li Y, Yin S, Huang F. Strategies to address key challenges of metallacycle/metallacage-based supramolecular coordination complexes in biomedical applications. Chem Soc Rev 2024; 53:3167-3204. [PMID: 38385584 DOI: 10.1039/d3cs00926b] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/23/2024]
Abstract
Owing to their capacity for dynamically linking two or more functional molecules, supramolecular coordination complexes (SCCs), exemplified by two-dimensional (2D) metallacycles and three-dimensional (3D) metallacages, have gained increasing significance in biomedical applications. However, their inherent hydrophobicity and self-assembly driven by heavy metal ions present common challenges in their applications. These challenges can be overcome by enhancing the aqueous solubility and in vivo circulation stability of SCCs, alongside minimizing their side effects during treatment. Addressing these challenges is crucial for advancing the fundamental research of SCCs and their subsequent clinical translation. In this review, drawing on extensive contemporary research, we offer a thorough and systematic analysis of the strategies employed by SCCs to surmount these prevalent yet pivotal obstacles. Additionally, we explore further potential challenges and prospects for the broader application of SCCs in the biomedical field.
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Affiliation(s)
- Dongdong Xu
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, P. R. China.
| | - Yang Li
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, P. R. China.
| | - Shouchun Yin
- Key Laboratory of Organosilicon Chemistry and Materials Technology of Ministry of Education, College of Materials, Chemistry and Chemical Engineering, Hangzhou Normal University, Hangzhou 311121, P. R. China.
| | - Feihe Huang
- Stoddart Institute of Molecular Science, Department of Chemistry, Zhejiang University, Hangzhou 310058, P. R. China.
- Zhejiang-Israel Joint Laboratory of Self-Assembling Functional Materials, ZJU-Hangzhou Global Scientific and Technological Innovation Center, Zhejiang University, Hangzhou, 311215, P. R. China
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2
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Sarkar S, Kumar R, Matson JB. Hydrogels for Gasotransmitter Delivery: Nitric Oxide, Carbon Monoxide, and Hydrogen Sulfide. Macromol Biosci 2024; 24:e2300138. [PMID: 37326828 PMCID: PMC11180494 DOI: 10.1002/mabi.202300138] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2023] [Revised: 06/08/2023] [Indexed: 06/17/2023]
Abstract
Gasotransmitters, gaseous signaling molecules including nitric oxide (NO), carbon monoxide (CO), and hydrogen sulfide (H2 S), maintain myriad physiological processes. Low levels of gasotransmitters are often associated with specific problems or diseases, so NO, CO, and H2 S hold potential in treating bacterial infections, chronic wounds, myocardial infarction, ischemia, and various other diseases. However, their clinical applications as therapeutic agents are limited due to their gaseous nature, short half-life, and broad physiological roles. One route toward the greater application of gasotransmitters in medicine is through localized delivery. Hydrogels are attractive biomedical materials for the controlled release of embedded therapeutics as they are typically biocompatible, possess high water content, have tunable mechanical properties, and are injectable in certain cases. Hydrogel-based gasotransmitter delivery systems began with NO, and hydrogels for CO and H2 S have appeared more recently. In this review, the biological importance of gasotransmitters is highlighted, and the fabrication of hydrogel materials is discussed, distinguishing between methods used to physically encapsulate small molecule gasotransmitter donor compounds or chemically tether them to a hydrogel scaffold. The release behavior and potential therapeutic applications of gasotransmitter-releasing hydrogels are also detailed. Finally, the authors envision the future of this field and describe challenges moving forward.
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Affiliation(s)
| | | | - John B. Matson
- Department of Chemistry, Virginia Tech, Blacksburg, Virginia 24061, USA
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3
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Hernandez-Baixauli J, Chomiciute G, Alcaide-Hidalgo JM, Crescenti A, Baselga-Escudero L, Palacios-Jordan H, Foguet-Romero E, Pedret A, Valls RM, Solà R, Mulero M, Del Bas JM. Developing a model to predict the early risk of hypertriglyceridemia based on inhibiting lipoprotein lipase (LPL): a translational study. Sci Rep 2023; 13:22646. [PMID: 38114521 PMCID: PMC10730820 DOI: 10.1038/s41598-023-49277-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Accepted: 12/06/2023] [Indexed: 12/21/2023] Open
Abstract
Hypertriglyceridemia (HTG) is an independent risk factor for atherosclerotic cardiovascular disease (ASCVD). One of the multiple origins of HTG alteration is impaired lipoprotein lipase (LPL) activity, which is an emerging target for HTG treatment. We hypothesised that early, even mild, alterations in LPL activity might result in an identifiable metabolomic signature. The aim of the present study was to assess whether a metabolic signature of altered LPL activity in a preclinical model can be identified in humans. A preclinical LPL-dependent model of HTG was developed using a single intraperitoneal injection of poloxamer 407 (P407) in male Wistar rats. A rat metabolomics signature was identified, which led to a predictive model developed using machine learning techniques. The predictive model was applied to 140 humans classified according to clinical guidelines as (1) normal, less than 1.7 mmol/L; (2) risk of HTG, above 1.7 mmol/L. Injection of P407 in rats induced HTG by effectively inhibiting plasma LPL activity. Significantly responsive metabolites (i.e. specific triacylglycerols, diacylglycerols, phosphatidylcholines, cholesterol esters and lysophospholipids) were used to generate a predictive model. Healthy human volunteers with the impaired predictive LPL signature had statistically higher levels of TG, TC, LDL and APOB than those without the impaired LPL signature. The application of predictive metabolomic models based on mechanistic preclinical research may be considered as a strategy to stratify subjects with HTG of different origins. This approach may be of interest for precision medicine and nutritional approaches.
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Affiliation(s)
- Julia Hernandez-Baixauli
- Eurecat, Centre Tecnològic de Catalunya, Unitat de Nutrició i Salut, 43204, Reus, Spain
- Laboratory of Metabolism and Obesity, Vall d'Hebron-Institut de Recerca, Universitat Autònoma de Barcelona, Barcelona, Spain
| | - Gertruda Chomiciute
- Eurecat, Centre Tecnològic de Catalunya, Unitat de Nutrició i Salut, 43204, Reus, Spain
| | | | - Anna Crescenti
- Eurecat, Centre Tecnològic de Catalunya, Unitat de Nutrició i Salut, 43204, Reus, Spain
| | | | - Hector Palacios-Jordan
- Eurecat, Centre Tecnològic de Catalunya, Centre for Omic Sciences (COS), Joint Unit Universitat Rovira i Virgili-EURECAT, 43204, Reus, Spain
| | - Elisabet Foguet-Romero
- Eurecat, Centre Tecnològic de Catalunya, Centre for Omic Sciences (COS), Joint Unit Universitat Rovira i Virgili-EURECAT, 43204, Reus, Spain
| | - Anna Pedret
- Functional Nutrition, Oxidation and Cardiovascular Diseases Group (NFOC-Salut), Facultat de Medicina i Ciències de la Salut, Universitat Rovira I Virgili, C/Sant Llorenç, 21, 43201, Reus, Spain
| | - Rosa M Valls
- Functional Nutrition, Oxidation and Cardiovascular Diseases Group (NFOC-Salut), Facultat de Medicina i Ciències de la Salut, Universitat Rovira I Virgili, C/Sant Llorenç, 21, 43201, Reus, Spain
| | - Rosa Solà
- Functional Nutrition, Oxidation and Cardiovascular Diseases Group (NFOC-Salut), Facultat de Medicina i Ciències de la Salut, Universitat Rovira I Virgili, C/Sant Llorenç, 21, 43201, Reus, Spain
- Internal Medicine Service, Hospital Universitari Sant Joan de Reus, Av/del Doctor Josep Laporte, 2, 43204, Reus, Spain
| | - Miquel Mulero
- Nutrigenomics Research Group, Department of Biochemistry and Biotechnology, Universitat Rovira i Virgili, 43007, Tarragona, Spain.
| | - Josep M Del Bas
- Eurecat, Centre Tecnològic de Catalunya, Àrea Biotecnologia, Reus, Spain.
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4
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Doan-Nguyen TP, Mantala K, Atithep T, Crespy D. Osmotic Pressure as Driving Force for Reducing the Size of Nanoparticles in Emulsions. ACS NANO 2022; 17:940-954. [PMID: 36472438 DOI: 10.1021/acsnano.2c05565] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
We describe here a method to decrease particle size of nanoparticles synthesized by miniemulsion polymerization. Small nanoparticles or nanocapsules were obtained by generating an osmotic pressure to induce the diffusion of monomer molecules from the dispersed phase of a miniemulsion before polymerization to an upper oil layer. The size reduction is dependent on the difference in concentration of monomer in the dispersed phase and in the upper oil layer and on the solubility of the monomer in water. By labeling the emulsion droplets with a copolymer of stearyl methacrylate and a polymerizable dye, we demonstrated that the migration of the monomer to the upper hexadecane layer relied on molecular diffusion rather than diffusion of monomer droplets to the oil layer. Moreover, surface tension measurements confirmed that the emulsions were still in the miniemulsion regime and not in the microemulsion regime. The particle size can be tuned by controlling the duration during which the miniemulsion stayed in contact with the hexadecane layer, the interfacial area between the miniemulsion and the hexadecane layer and by the concentration of surfactant. Our method was applied to reduce the size of polystyrene and poly(methyl methacrylate) nanoparticles, nanocapsules of a copolymer of styrene and methyl methacrylic acid, and silica nanocapsules. This work demonstrated that a successful reduction of nanoparticle size in the miniemulsion process can be achieved without using excess amounts of surfactant. The method relies on building osmotic pressure in oil droplets dispersed in water which acts as semipermeable membrane.
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Affiliation(s)
- Thao P Doan-Nguyen
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Kanyarat Mantala
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Thassanant Atithep
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
| | - Daniel Crespy
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
- Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong 21210, Thailand
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5
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Calder D, Fathi A, Oveissi F, Maleknia S, Abrams T, Wang Y, Maitz J, Tsai KHY, Maitz P, Chrzanowski W, Canoy I, Menon VA, Lee K, Ahern BJ, Lean NE, Silva DM, Young PM, Traini D, Ong HX, Mahmoud RS, Montazerian H, Khademhosseini A, Dehghani F, Dehghani F. Thermoresponsive and Injectable Hydrogel for Tissue Agnostic Regeneration. Adv Healthc Mater 2022; 11:e2201714. [PMID: 36148581 DOI: 10.1002/adhm.202201714] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 09/16/2022] [Indexed: 01/28/2023]
Abstract
Injectable hydrogels can support the body's innate healing capability by providing a temporary matrix for host cell ingrowth and neovascularization. The clinical adoption of current injectable systems remains low due to their cumbersome preparation requirements, device malfunction, product dislodgment during administration, and uncontrolled biological responses at the treatment site. To address these challenges, a fully synthetic and ready-to-use injectable biomaterial is engineered that forms an adhesive hydrogel that remains at the administration site regardless of defect anatomy. The product elicits a negligible local inflammatory response and fully resorbs into nontoxic components with minimal impact on internal organs. Preclinical animal studies confirm that the engineered hydrogel upregulates the regeneration of both soft and hard tissues by providing a temporary matrix to support host cell ingrowth and neovascularization. In a pilot clinical trial, the engineered hydrogel is successfully administered to a socket site post tooth extraction and forms adhesive hydrogel that stabilizes blood clot and supports soft and hard tissue regeneration. Accordingly, this injectable hydrogel exhibits high therapeutic potential and can be adopted to address multiple unmet needs in different clinical settings.
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Affiliation(s)
- Dax Calder
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.,Faculty of Medicine and Health, Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia.,Faculty of Health and Medical Sciences, School of Biomedical Sciences, University of Western Australia, Perth, WA, 6009, Australia
| | - Ali Fathi
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia.,Tetratherix, Sydney, NSW, 2015, Australia
| | - Farshad Oveissi
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
| | | | | | - Yiwei Wang
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord, NSW, 2139, Australia
| | - Joanneke Maitz
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord, NSW, 2139, Australia
| | - Kevin Hung-Yueh Tsai
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord, NSW, 2139, Australia
| | - Peter Maitz
- Burns and Reconstructive Surgery Research Group, ANZAC Research Institute, Concord, NSW, 2139, Australia
| | - Wojtek Chrzanowski
- Faculty of Medicine and Health, Nano Institute, The University of Sydney, Sydney, NSW, 2006, Australia.,Faculty of Health and Medical Sciences, School of Biomedical Sciences, University of Western Australia, Perth, WA, 6009, Australia
| | - Ivan Canoy
- Anatomical Pathology, NSW Health Pathology, Concord Repatriation General Hospital, Concord, NSW, 2139, Australia
| | - Vivek Ashoka Menon
- Anatomical Pathology, NSW Health Pathology, Concord Repatriation General Hospital, Concord, NSW, 2139, Australia
| | - Kenneth Lee
- Anatomical Pathology, NSW Health Pathology, Concord Repatriation General Hospital, Concord, NSW, 2139, Australia.,School of Medicine, University of Sydney, Sydney, NSW, 2006, Australia
| | - Benjamin J Ahern
- School of Veterinary Science, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Natasha E Lean
- School of Veterinary Science, The University of Queensland, Brisbane, QLD, 4072, Australia
| | - Dina M Silva
- Macquarie Medical School, Faculty of Medicine and Health, Macquarie University & Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW, 2037, Australia.,Ab Initio Pharma, Camperdown, NSW, 2050, Australia
| | - Paul M Young
- Macquarie Medical School, Faculty of Medicine and Health, Macquarie University & Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW, 2037, Australia.,Ab Initio Pharma, Camperdown, NSW, 2050, Australia
| | - Daniela Traini
- Macquarie Medical School, Faculty of Medicine and Health, Macquarie University & Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW, 2037, Australia.,Ab Initio Pharma, Camperdown, NSW, 2050, Australia
| | - Hui Xin Ong
- Macquarie Medical School, Faculty of Medicine and Health, Macquarie University & Woolcock Institute of Medical Research, The University of Sydney, Glebe, NSW, 2037, Australia.,Ab Initio Pharma, Camperdown, NSW, 2050, Australia
| | | | - Hossein Montazerian
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90024, USA.,Department of Bioengineering, University of California, Los Angeles, CA, 90095, USA.,California NanoSystems Institute (CNSI), University of California, Los Angeles, CA, 90095, USA
| | - Ali Khademhosseini
- Terasaki Institute for Biomedical Innovation, Los Angeles, CA, 90024, USA
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
| | - Fariba Dehghani
- School of Chemical and Biomolecular Engineering, The University of Sydney, Sydney, NSW, 2006, Australia
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6
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Jaquilin P J R, Oluwafemi OS, Thomas S, Oyedeji AO. Recent advances in drug delivery nanocarriers incorporated in temperature-sensitive Pluronic F-127–A critical review. J Drug Deliv Sci Technol 2022. [DOI: 10.1016/j.jddst.2022.103390] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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7
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Yin L, Pang Y, Shan L, Gu J. The in vivo pharmacokinetics of block copolymers containing polyethylene glycol used in nanocarrier drug delivery systems. Drug Metab Dispos 2022; 50:827-836. [DOI: 10.1124/dmd.121.000568] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 01/05/2022] [Indexed: 11/22/2022] Open
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8
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Kumar R, Akhtar F, Rizvi SI. Protective effect of hesperidin in Poloxamer-407 induced hyperlipidemic experimental rats. Biol Futur 2021; 72:201-210. [PMID: 34554473 DOI: 10.1007/s42977-020-00053-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2020] [Accepted: 11/23/2020] [Indexed: 11/28/2022]
Abstract
Hyperlipidemia is one of the leading causes of, atherosclerosis, and cardiovascular disease. In this study, we evaluated the protective role of hesperidin (HES) against lipidemic stress in a hyperlipidemic model of rats. We developed a hyperlipidemic model of the rat through an i.p dose of poloxamer-407, 0.5 g/kg body weight for 3 alternative days in a week for 30 days and rats were supplemented with HES orally (100 mg/kg body weight) once daily. Bodyweight, fasting glucose, insulin, HOMA-IR index, triglyceride, cholesterol, ROS, FRAP, GSH, PMRS, AGE, MDA, PCO, AOPP, PON-1, TNF-α and IL-6, SGPT and SGOT were estimated in blood and plasma, and histopathology was done in liver tissue. Our data show that oxidative stress, inflammatory markers were increased in the P-407 treated group. Liver tissue histology also changes in the hyperlipidemic groups of rats.HES supplementation protects against P-407 induced alterations and maintains the redox homeostasis. Our results provide evidence that HES protects against lipidemic stress and redox imbalance induced by P-407 in rats.
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Affiliation(s)
- Raushan Kumar
- Department of Biochemistry, University of Allahabad, Allahabad, 211002, India
| | - Farhan Akhtar
- Department of Biochemistry, University of Allahabad, Allahabad, 211002, India
| | - Syed Ibrahim Rizvi
- Department of Biochemistry, University of Allahabad, Allahabad, 211002, India.
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9
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Thermosensitive Poloxamer- graft-Carboxymethyl Pullulan: A Potential Injectable Hydrogel for Drug Delivery. Polymers (Basel) 2021; 13:polym13183025. [PMID: 34577926 PMCID: PMC8466796 DOI: 10.3390/polym13183025] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2021] [Revised: 08/26/2021] [Accepted: 09/03/2021] [Indexed: 02/07/2023] Open
Abstract
A thermosensitive copolymer composed of amphiphilic triblock copolymer, poloxamer 407, grafted on hydrophilic pullulan with pendant carboxymethyl groups (CMP) was prepared and characterized. The structure of the new copolymer was assessed by Fourier transform infrared (FT-IR) and 1H nuclear magnetic resonance (1H NMR) spectroscopy. The content of the poloxamer in the grafted copolymer was 83.8% (w/w). The effect of the copolymer concentration on the gelation behavior was analyzed by the vertical method and rheological tests; the gel phase of the copolymer occurred at a lower concentration (11%, w/v) as compared with poloxamer (18%, w/v). The starting gelation time under the simulated physiological conditions (phosphate buffer with a pH of 7.4, at 37 °C) was sensitive on the rest temperature before the test, this being 990 s and 280 s after 24 h rest at 4 °C and 20 °C, respectively. The rheological tests evidenced a high elasticity and excellent ability of the copolymer to recover the initial structure after the removal of the applied force or external stimuli. Moreover, the hydrogel has proved a sustained release of amoxicillin (taken as a model drug) over 168 h. Taken together, the results clearly indicate that this copolymer can be used as an injectable hydrogel.
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10
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Doan‐Nguyen TP, Jiang S, Koynov K, Landfester K, Crespy D. Ultrasmall Nanocapsules Obtained by Controlling Ostwald Ripening. Angew Chem Int Ed Engl 2021. [DOI: 10.1002/ange.202103444] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Affiliation(s)
- Thao P. Doan‐Nguyen
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials Vidyasirimedhi Institute of Science and Technology (VISTEC) Rayong 21210 Thailand
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology (VISTEC) Rayong 21210 Thailand
| | - Shuai Jiang
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials Vidyasirimedhi Institute of Science and Technology (VISTEC) Rayong 21210 Thailand
- Max Planck Institute for Polymer Research 55128 Mainz Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research 55128 Mainz Germany
| | | | - Daniel Crespy
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials Vidyasirimedhi Institute of Science and Technology (VISTEC) Rayong 21210 Thailand
- Department of Materials Science and Engineering School of Molecular Science and Engineering Vidyasirimedhi Institute of Science and Technology (VISTEC) Rayong 21210 Thailand
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11
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Doan-Nguyen TP, Jiang S, Koynov K, Landfester K, Crespy D. Ultrasmall Nanocapsules Obtained by Controlling Ostwald Ripening. Angew Chem Int Ed Engl 2021; 60:18094-18102. [PMID: 34056797 DOI: 10.1002/anie.202103444] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2021] [Revised: 04/28/2021] [Indexed: 11/10/2022]
Abstract
We describe here a method to synthesize ultrasmall nanocapsules with a diameter of 6 nm, exhibiting a well-defined core-shell morphology. Remarkably, the nanocapules are synthesized in a miniemulsion process without the need of large amounts of surfactant as commonly used in the microemulsion process. Ultrasmall nanocapsules with an oil core and a silica shell are formed by the concurrent processes of a sol-gel reaction and Ostwald ripening. Using solvents with different water solubilities and alkoxysilanes with different reactivities, we demonstrate that sizes of obtained nanocapsules depend on the ripening rate and alkoxysilane conversion rate. The method can be also used for encapsulating natural oils such as peppermint oil and limonene. This work shows that the Ostwald ripening phenomenon can be employed beneficially for the preparation of very small colloids.
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Affiliation(s)
- Thao P Doan-Nguyen
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand.,Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand
| | - Shuai Jiang
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand.,Max Planck Institute for Polymer Research, 55128, Mainz, Germany
| | - Kaloian Koynov
- Max Planck Institute for Polymer Research, 55128, Mainz, Germany
| | | | - Daniel Crespy
- Max Planck-VISTEC Partner Laboratory for Sustainable Materials, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand.,Department of Materials Science and Engineering, School of Molecular Science and Engineering, Vidyasirimedhi Institute of Science and Technology (VISTEC), Rayong, 21210, Thailand
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12
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Carvalho GC, Araujo VHS, Fonseca-Santos B, de Araújo JTC, de Souza MPC, Duarte JL, Chorilli M. Highlights in poloxamer-based drug delivery systems as strategy at local application for vaginal infections. Int J Pharm 2021; 602:120635. [PMID: 33895295 DOI: 10.1016/j.ijpharm.2021.120635] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/16/2021] [Accepted: 04/19/2021] [Indexed: 01/02/2023]
Abstract
Infectious diseases related to the vagina include diseases caused by the imbalance of the vaginal flora and by sexually transmitted infections. Some of these present themselves as a public health problem due to the lack of efficient treatment that leads to their complete cure, and others due to the growing resistance to drugs used in therapy. In this sense, new treatment strategies are desirable, with vaginal administration rout being a great choice since can bypass first-pass metabolism and decrease drug interactions and adverse effects. However, it is worth highlighting limitations related to patient's discomfort at application time. Thereby, the use of poloxamer-based drug delivery systems is desirable due its stimuli-sensitive characteristic. Therefore, the present review reports a brief overview of poloxamer properties, biological behavior and advances in poloxamer applications in controlled drug release systems for infectious diseases related to the vagina treatment and prevention.
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Affiliation(s)
- Gabriela Corrêa Carvalho
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, Brazil
| | - Victor Hugo Sousa Araujo
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, Brazil
| | - Bruno Fonseca-Santos
- Faculty of Pharmaceutical Sciences, University of Campinas (UNICAMP), 13083-871 Campinas, Brazil
| | | | | | - Jonatas Lobato Duarte
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, Brazil
| | - Marlus Chorilli
- School of Pharmaceutical Sciences, São Paulo State University (UNESP), 14800-903 Araraquara, Brazil.
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13
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Eltellawy YA, El-Kayal M, Abdel-Rahman RF, Salah S, Shaker DS. Optimization of transdermal atorvastatin calcium - Loaded proniosomes: Restoring lipid profile and alleviating hepatotoxicity in poloxamer 407-induced hyperlipidemia. Int J Pharm 2020; 593:120163. [PMID: 33309831 DOI: 10.1016/j.ijpharm.2020.120163] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2020] [Revised: 11/28/2020] [Accepted: 12/05/2020] [Indexed: 01/22/2023]
Abstract
In an attempt to optimize the anti- hyperlipidemic effect and reduce statins induced hepatotoxicity, Atorvastatin Calcium (ATC) transdermal proniosomal gel (PNG) was developed. Different non-ionic surfactants (NISs) (Spans, Tweens, Cremophor RH 40 and Brij 52) were incorporated in the vesicle's lipid bilayer, in combination with lecithin. PNG formulae were characterized for encapsulation efficiency percent (% EE), vesicle size, polydispersity index (PDI) and zeta potential (ZP). Ex-vivo permeation study was performed using full thickness rat skin measuring drug flux and skin permeability coefficients. The pharmacodynamic performance of optimized transdermal ATC- PNG on both lipid profile and liver biomarkers was assessed and compared to oral ATC administration in poloxamer 407-induced hyperlipidemic rats. The liver tissues were subjected to histological examination as well. The results revealed nano-size range vesicles with relatively high ATC entrapment efficiency. Ex-vivo results demonstrated the permeation superiority of ATC proniosomes over free drug. Pharmacodynamic study revealed that transdermal administration of ATC- PNG succeeded in retaining the anti-hyperlipidemic efficacy of orally administered ATC without elevating liver biomarkers. The histological examination signified the role of optimized ATC-PNG in hindering statin- induced hepatocellular damage. The obtained results suggested a promising, easy-to-manufacture and effective ATC proniosomal gel for safe treatment of hyperlipidemia.
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Affiliation(s)
- Yasmin A Eltellawy
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt (FUE), Cairo, Egypt.
| | - Maha El-Kayal
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt (FUE), Cairo, Egypt
| | | | - Salwa Salah
- Department of Pharmaceutics & Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
| | - Dalia S Shaker
- Department of Pharmaceutics & Pharmaceutical Technology, Faculty of Pharmaceutical Sciences and Pharmaceutical Industries, Future University in Egypt (FUE), Cairo, Egypt.
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Schuh JCL, Holve DL, Mundwiler KE. Corneal Dystrophy in Dutch Belted Rabbits as a Possible Model of Thiel-Behnke Subtype of Epithelial-Stromal TGFβ-Induced Corneal Dystrophy. Toxicol Pathol 2020; 49:555-568. [PMID: 33287658 DOI: 10.1177/0192623320968092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
The International Committee for Classification of Corneal Dystrophies (IC3D) categorized corneal dystrophies in humans using anatomic, genotypic, and clinicopathologic phenotypic features. Relative to the IC3D classification, a review of the veterinary literature confirmed that corneal dystrophy is imprecisely applied to any corneal opacity and to multiple poorly characterized histologic abnormalities of the cornea in animals. True corneal dystrophy occurs in mice with targeted mutations and spontaneously in pet dogs and cats and in Dutch belted (DB) rabbits, but these instances lack complete phenotyping or genotyping. Corneal dystrophy in DB rabbits can be an important confounding finding in ocular toxicology studies but has only been described once. Therefore, the ophthalmology and pathology of corneal dystrophy in 13 DB rabbits were characterized to determine whether the findings were consistent with or a possible model of any corneal dystrophy subtypes in humans. Slit lamp and optical coherence tomography (OCT) imaging were used to characterize corneal dystrophy over 4 months in young DB rabbits. The hyperechoic OCT changes correlated with light microscopic findings in the anterior stroma, consisting of highly disordered collagen fibers and enlarged keratocytes. Histochemical stains did not reveal abnormal deposits. Small clusters of 8 to 16 nm diameter curly fibers identified by transmission electron microscopy were consistent with Thiel-Behnke (TBCD) subtype of epithelial-stromal transforming growth factor β-induced dystrophies. Sporadic corneal dystrophy in DB rabbits appears to be a potential animal model of TBCD, but genotypic characterization will be required to confirm this categorization.
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Affiliation(s)
| | - Dana L Holve
- 486251Biological Test Center, Irvine, CA, USA.,Currently, Incline Village, NV, USA
| | - Karen E Mundwiler
- 486251Biological Test Center, Irvine, CA, USA.,Currently, Huntington Beach, CA, USA
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15
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Laniesse D, Sanchez-Migallon Guzman D, Smith DA, Douglas JM, Mosley C, Beaufrère H, Paul-Murphy J. Evaluation of the thermal antinociceptive effects of subcutaneous administration of butorphanol tartrate or butorphanol tartrate in a sustained-release poloxamer 407 gel formulation to orange-winged Amazon parrots ( Amazona amazonica). Am J Vet Res 2020; 81:543-550. [PMID: 32584180 DOI: 10.2460/ajvr.81.7.543] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
OBJECTIVE To determine the thermal antinociceptive effects of butorphanol tartrate and butorphanol tartrate in a sustained-release 25% poloxamer 407 (P407) gel formulation (But-P407) in parrots. ANIMALS 13 orange-winged Amazon parrots (Amazona amazonica). PROCEDURES First, butorphanol tartrate (5 mg/kg) or saline (0.9% NaCl) solution was administered IM to birds in a randomized complete crossover design. The temperature prompting a foot withdrawal response to a thermal stimulus (ie, the thermal threshold) was determined 30 minutes before (baseline) and at various points after treatment administration. Second, But-P407 (12.5 mg/kg) or P407 was administered SC in a similar crossover design. Thermal threshold was determined before and at various points after treatment administration. Third, But-P407 (12.5 mg/kg) or saline solution was administered SC and evaluated as in the second trial. Sedation was scored immediately before each time point in all 3 trials. RESULTS In the first trial, a significant increase in thermal threshold was noted 30 minutes after butorphanol tartrate (vs saline solution) administration. No sedation was noted. In the second and third trials, no significant difference was identified between results for But-P407 and those for either control treatment (saline solution or P407). Mild sedation was noted in the second trial following But-P407 administration. CONCLUSIONS AND CLINICAL RELEVANCE Results suggested a small but significant thermal antinociceptive effect of butorphanol tartrate lasting between 30 minutes and 1.5 hours in orange-winged Amazon parrots. No antinociceptive effect of butorphanol tartrate was demonstrated when delivered in P407. Further research is needed to evaluate the potential analgesic effects of But-P407.
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16
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Zeng Y, Chen J, Li Y, Huang J, Huang Z, Huang Y, Pan X, Wu C. Thermo-sensitive gel in glaucoma therapy for enhanced bioavailability: In vitro characterization, in vivo pharmacokinetics and pharmacodynamics study. Life Sci 2018; 212:80-86. [PMID: 30268857 DOI: 10.1016/j.lfs.2018.09.050] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2018] [Revised: 09/22/2018] [Accepted: 09/26/2018] [Indexed: 11/28/2022]
Abstract
AIMS Glaucoma is a chronic ophthalmic disease, which has become one of the leading causes to progressive and irreversible blindness. Current ophthalmic drug delivery to treat glaucoma is mostly eyedrop, whose rapid elimination on corneal surface can lead to poor bioavailability. The present study was aimed to develop a timolol maleate loaded thermo-sensitive gel (TM-TSG) with improved bioavailability to treat glaucoma. MAIN METHODS TM-TSG was prepared by homogeneously dispersing 0.3% (w/v) timolol maleate, 24.25% (w/v) poloxamer 407 (P407) and 1.56% (w/v) poloxamer 188 (P188) into phosphate buffer solution (pH = 7.4) and the formulated TM-TSG was characterized. KEY FINDINGS TM-TSG was stored in liquid form at room temperature (25 °C) and transited to semisolid gel at physiological temperature (32 °C). The rheological property of TM-TSG was in favor of uniform distribution of drug. TM-TSG showed good stability at different conditions including centrifugation, autoclaving and different temperature. In vivo pharmacokinetic studies indicated that TM-TSG could enhance absorption of TM in aqueous humor and improve the ocular bioavailability in comparison of commercial TM eyedrops. In vivo experiment result showed that TM-TSG had greater effect in treating glaucoma than TM eyedrops by sustainably lowering intraocular pressure (IOP) for a week. Moreover, slit lamp test and histopathological analysis demonstrated that TM-TSG had excellent biocompatibility. SIGNIFICANCE TM-TSG could be a promising ophthalmic delivery system for glaucoma therapy.
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Affiliation(s)
- Youmei Zeng
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Jintian Chen
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Yanrong Li
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Jiayuan Huang
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Zhengwei Huang
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Ying Huang
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Xin Pan
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
| | - Chuanbin Wu
- School of Pharmaceutical Science, Sun Yat-Sen University, Guangzhou 510006, PR China.
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17
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Lee U, Kwon MH, Kang HE. Pharmacokinetic alterations in poloxamer 407-induced hyperlipidemic rats. Xenobiotica 2018; 49:611-625. [PMID: 29658375 DOI: 10.1080/00498254.2018.1466212] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
1. Plasma lipid profile abnormalities in hyperlipidemia can potentially alter the pharmacokinetics of a drug in a complex manner. To evaluate these pharmacokinetic alterations in hyperlipidemia and to determine the underlying mechanism(s), poloxamer 407-induced hyperlipidemic rats (HL rats), a well-established animal model of hyperlipidemia have been used. 2. In this review, we summarize findings on the pathophysiological and gene expression changes in drug-metabolizing enzymes and transporters in HL rats. We discuss pharmacokinetic changes in drugs metabolized primarily via hepatic cytochrome P450 (CYPs) in terms of alterations in hepatic intrinsic clearance (CL'int), free fraction in plasma (fu) and hepatic blood flow rate (QH), depending on the hepatic excretion ratio, as well as drugs eliminated primarily by mechanisms other than hepatic CYPs. 3. For lipoprotein-bound drugs, increased binding to lipoproteins resulted in lower fu values and volumes of distribution, with some exceptions. Generally, slower non-renal clearance (or total body clearance) of drugs that are substrates of hepatic CYP3A and CYP2C is well explained by the following factors: alterations in CL'int (due to down-regulation of hepatic CYPs), decreased fu and/or possible decreased QH. 4. These consistent findings across studies in HL rats suggest more studies are needed at the clinical level for optimal pharmacotherapies for hyperlipidemia.
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Affiliation(s)
- Unji Lee
- a Department of Pharmacy , Ewha Womans University Medical Center , Seoul , South Korea
| | - Mi Hye Kwon
- b College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences , The Catholic University of Korea , Bucheon , South Korea
| | - Hee Eun Kang
- b College of Pharmacy and Integrated Research Institute of Pharmaceutical Sciences , The Catholic University of Korea , Bucheon , South Korea
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18
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Pilny AA. Use of a Compounded Poloxamer 407 Antibiotic Topical Therapy as Part of the Successful Management of Chronic Ulcerative Dermatitis in a Congo African Grey Parrot (Psittacus erithacus). J Avian Med Surg 2018; 32:45-49. [DOI: 10.1647/2016-220] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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19
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Mosayebi J, Kiyasatfar M, Laurent S. Synthesis, Functionalization, and Design of Magnetic Nanoparticles for Theranostic Applications. Adv Healthc Mater 2017; 6. [PMID: 28990364 DOI: 10.1002/adhm.201700306] [Citation(s) in RCA: 115] [Impact Index Per Article: 16.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/14/2017] [Indexed: 12/13/2022]
Abstract
In order to translate nanotechnology into medical practice, magnetic nanoparticles (MNPs) have been presented as a class of non-invasive nanomaterials for numerous biomedical applications. In particular, MNPs have opened a door for simultaneous diagnosis and brisk treatment of diseases in the form of theranostic agents. This review highlights the recent advances in preparation and utilization of MNPs from the synthesis and functionalization steps to the final design consideration in evading the body immune system for therapeutic and diagnostic applications with addressing the most recent examples of the literature in each section. This study provides a conceptual framework of a wide range of synthetic routes classified mainly as wet chemistry, state-of-the-art microfluidic reactors, and biogenic routes, along with the most popular coating materials to stabilize resultant MNPs. Additionally, key aspects of prolonging the half-life of MNPs via overcoming the sequential biological barriers are covered through unraveling the biophysical interactions at the bio-nano interface and giving a set of criteria to efficiently modulate MNPs' physicochemical properties. Furthermore, concepts of passive and active targeting for successful cell internalization, by respectively exploiting the unique properties of cancers and novel targeting ligands are described in detail. Finally, this study extensively covers the recent developments in magnetic drug targeting and hyperthermia as therapeutic applications of MNPs. In addition, multi-modal imaging via fusion of magnetic resonance imaging, and also innovative magnetic particle imaging with other imaging techniques for early diagnosis of diseases are extensively provided.
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Affiliation(s)
- Jalal Mosayebi
- Department of Mechanical Engineering; Urmia University; Urmia 5756151818 Iran
| | - Mehdi Kiyasatfar
- Department of Mechanical Engineering; Urmia University; Urmia 5756151818 Iran
| | - Sophie Laurent
- Laboratory of NMR and Molecular Imaging; University of Mons; Mons Belgium
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20
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Evaluation of buprenorphine hydrochloride Pluronic(®) gel formulation in male C57BL/6NCrl mice. Lab Anim (NY) 2017; 45:370-9. [PMID: 27654688 DOI: 10.1038/laban.1106] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2016] [Accepted: 08/11/2016] [Indexed: 11/08/2022]
Abstract
Providing adequate analgesia while minimizing handling and stress post-surgery can be challenging. Recently, there have been commercial products made available for providing long acting analgesia in rodents. However, we find there are limitations for use in mice due to the viscosity of the product and the small dosing volumes needed. This project evaluated an in-house compounded formulation of buprenorphine easily made in the laboratory using pharmaceutical grade products. The release of buprenorphine was evaluated when compounded with two types of hydrogels (Pluronic(®) F-127 and F-68). Mice given buprenorphine in hydrogel (BP) demonstrated higher serum levels of buprenorphine for a longer period of time compared to mice given standard buprenorphine (Bup). However, the rate of decline in serum levels between the groups was similar; thus, it is more likely that the higher buprenorphine concentration seen in the BP group is due to the higher dose of buprenorphine given, rather than a slower release of product. Feed consumption was decreased in both groups one day after dosing; however, there was no difference in body weights. Increased activity in the open field was observed with both buprenorphine formulations, and lipemia was observed in mice given BP which persisted to at least 96 h. Based on our results, we conclude that this formulation did not sustain the release of buprenorphine or eliminate the increased activity commonly seen in mice given buprenorphine. In addition, the lipemia may confound research parameters, especially in cardiac studies and lipid metabolism studies. Therefore, we cannot recommend this formulation for use.
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21
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Braun JBS, Ruchel JB, Adefegha SA, Coelho APV, Trelles KB, Signor C, Rubin MA, Oliveira JS, Dornelles GL, de Andrade CM, Castilhos LG, Leal DBR. Neuroprotective effects of pretreatment with quercetin as assessed by acetylcholinesterase assay and behavioral testing in poloxamer-407 induced hyperlipidemic rats. Biomed Pharmacother 2017; 88:1054-1063. [PMID: 28192878 DOI: 10.1016/j.biopha.2017.01.134] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2016] [Revised: 01/22/2017] [Accepted: 01/23/2017] [Indexed: 10/20/2022] Open
Abstract
Hyperlipidemia is a group of disorders characterized by excessive lipids in the bloodstream. It is associated with the incidence of cardiovascular diseases and recognized as the most important factor underlying the occurrence of atherosclerosis. This study was conducted to investigate whether pretreatment with quercetin can protect against possible memory impairment and deterioration of the cholinergic system in hyperlipidemic rats. Animals were divided into ten groups (n=7): saline/control, saline/quercetin 5mg/kg, saline/quercetin 25mg/kg, saline/quercetin 50mg/kg, saline/simvastatin (0.04mg/kg), hyperlipidemia, hyperlipidemia/quercetin 5mg/kg, hyperlipidemia/quercetin 25mg/kg, hyperlipidemia/quercetin 50mg/kg and hyperlipidemia/simvastatin. The animals were pretreated with quercetin by oral gavage for a period of 30days and hyperlipidemia was subsequently induced by intraperitoneal administration of a single dose of 500mg/kg of poloxamer-407. Simvastatin was administered after the induction of hyperlipidemia. The results demonstrated that hyperlipidemic rats had memory impairment compared with the saline control group (P<0.001). However, pretreatment with quercetin and simvastatin treatment attenuated the damage caused by hyperlipidemia compared with the hyperlipidemic group (P<0.05). Acetylcholinesterase (AChE) activity in the cerebral hippocampus was significantly (P<0.001) reduced in the hyperlipidemic group compared with the control saline group. Pretreatment with quercetin and simvastatin treatment in the hyperlipidemic groups significantly (P<0.05) increased AChE activity compared with the hyperlipidemic group. Our results thus suggest that quercetin may prevent memory impairment, alter lipid metabolism, and modulate AChE activity in an experimental model of hyperlipidemia.
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Affiliation(s)
- Josiane B S Braun
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Jader B Ruchel
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Stephen A Adefegha
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Ana Paula V Coelho
- Graduação em Ciências Biológicas Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Kelly B Trelles
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Cristiane Signor
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Maribel A Rubin
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Juliana S Oliveira
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Guilherme L Dornelles
- Programa de Pós-Graduação em Medicina Veterinária, Setor de Bioquímica e Estresse Oxidativo do Laboratório de Terapia Celular, Centro de Ciências Rurais, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Cinthia M de Andrade
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil; Programa de Pós-Graduação em Medicina Veterinária, Setor de Bioquímica e Estresse Oxidativo do Laboratório de Terapia Celular, Centro de Ciências Rurais, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Lívia G Castilhos
- Programa de-Pós Graduação em Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
| | - Daniela B R Leal
- Programa de-Pós Graduação em Ciências Biológicas: Bioquímica Toxicológica, Departamento de Bioquímica e Biologia Molecular, Centro de Ciências Naturais e Exatas, Universidade Federal de Santa Maria, RS, 97105-900, Brazil; Programa de-Pós Graduação em Ciências Farmacêuticas, Centro de Ciências da Saúde, Universidade Federal de Santa Maria, RS, 97105-900, Brazil.
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22
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Paavola A, Bernards CM, Rosenberg PH. Controlled release ibuprofen-poloxamer gel for epidural use – A pharmacokinetic study using microdialysis in pigs. Eur J Pharm Biopharm 2016; 108:180-186. [DOI: 10.1016/j.ejpb.2016.09.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2016] [Revised: 09/03/2016] [Accepted: 09/06/2016] [Indexed: 11/30/2022]
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23
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Wang X, Zhao X, Lin T, Guo H. Thermo-sensitive hydrogel for preventing bowel injury in percutaneous renal radiofrequency ablation. Int Urol Nephrol 2016; 48:1593-600. [DOI: 10.1007/s11255-016-1349-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 06/17/2016] [Indexed: 01/20/2023]
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24
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Mehta V, Ofir K, Swanson A, Kloczko E, Boyd M, Barker H, Avdic-Belltheus A, Martin J, Zachary I, Peebles D, David AL. Gene Targeting to the Uteroplacental Circulation of Pregnant Guinea Pigs. Reprod Sci 2016; 23:1087-95. [PMID: 26865541 DOI: 10.1177/1933719116630411] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Our study aimed to target adenoviral gene therapy to the uteroplacental circulation of pregnant guinea pigs in order to develop a novel therapy for fetal growth restriction. Four methods of delivery of an adenovirus encoding β-galactosidase (Ad.LacZ) were evaluated: intravascular injection using phosphate-buffered saline (PBS) into (1) uterine artery (UtA) or (2) internal iliac artery or external administration in (3) PBS or (4) pluronic F-127 gel (Sigma Aldrich). Postmortem examination was performed 4 to 7 days after gene transfer. Tissue transduction was assessed by X-gal histochemistry and enzyme-linked immunosorbent assay. External vascular application of the adenovirus vector in combination with pluronic gel had 91.7% success rate in terms of administration (85% maternal survival) and gave the best results for maternal/fetal survival and local transduction efficiency without any spread to maternal or fetal tissues. This study suggests an optimal method of gene delivery to the UtAs of a small rodent for preclinical studies.
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Affiliation(s)
- Vedanta Mehta
- Institute for Women's Health, University College London, London, United Kingdom Centre for Cardiovascular Biology and Medicine, University College London, London, United Kingdom
| | - Keren Ofir
- Institute for Women's Health, University College London, London, United Kingdom
| | - Anna Swanson
- Institute for Women's Health, University College London, London, United Kingdom
| | - Ewa Kloczko
- Institute for Women's Health, University College London, London, United Kingdom
| | - Michael Boyd
- BSU, Royal Veterinary College, London, United Kingdom
| | - Hannah Barker
- BSU, Royal Veterinary College, London, United Kingdom
| | | | - John Martin
- Centre for Cardiovascular Biology and Medicine, University College London, London, United Kingdom
| | - Ian Zachary
- Centre for Cardiovascular Biology and Medicine, University College London, London, United Kingdom
| | - Donald Peebles
- Institute for Women's Health, University College London, London, United Kingdom
| | - Anna L David
- Institute for Women's Health, University College London, London, United Kingdom
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25
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Zhang L, Zhang Z, Li Y, Liao S, Wu X, Chang Q, Liang B. Cholesterol induces lipoprotein lipase expression in a tree shrew (Tupaia belangeri chinensis) model of non-alcoholic fatty liver disease. Sci Rep 2015; 5:15970. [PMID: 26522240 PMCID: PMC4629153 DOI: 10.1038/srep15970] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2015] [Accepted: 10/06/2015] [Indexed: 12/28/2022] Open
Abstract
Animal models are indispensible to investigate the pathogenesis and treatments of non-alcoholic fatty liver diseases (NAFLD). Altered cholesterol metabolism has been implicated into the pathogenesis of NAFLD. Here, using high fat, cholesterol and cholate diet (HFHC), we generated a novel tree shrew (Tupaia belangeri chinensis) model of NAFLD, which displayed dyslipidemia with increased levels of plasma alanine aminotransferase (ALT) and aspartate aminotransferase (AST), total cholesterol (TC), low density lipoprotein-cholesterol (LDL-c) and high density lipoprotein-cholesterol (HDL-c), but decreased level of triglycerides (TG). Liver histopathology and genes expression indicated that HFHC diet successfully induced liver steatosis to inflammation and fibrosis progressively within 10 weeks. Moreover, HFHC induced the transcriptional expression of lipoprotein lipase (lpl) in the liver, but repressed the expression of LDL receptor, and the endogenous synthesis pathway and excretion of cholesterol. Notably, Poloxamer 407 (P-407) inhibition of LPL improved the severity of steatosis and reduced inflammation. These results illustrated that LPL plays an important role in cholesterol metabolism in NAFLD, and the tree shrew may be a valuable animal model for further research into NAFLD.
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Affiliation(s)
- Linqiang Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan 650204, China
| | - Zhiguo Zhang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China.,Kunming College of Life Science, University of Chinese Academy of Sciences, Kunming, Yunnan 650204, China
| | - Yunhai Li
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Shasha Liao
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China.,School of Life Sciences, Anhui University, Hefei, Anhui 230601, China
| | - Xiaoyun Wu
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Qing Chang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
| | - Bin Liang
- Key Laboratory of Animal Models and Human Disease Mechanisms of Chinese Academy of Science &Yunnan province, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan 650223, China
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Kjøniksen AL, Calejo MT, Zhu K, Nyström B, Sande SA. Stabilization of Pluronic Gels by Hydrophobically Modified Hydroxyethylcellulose. INT J POLYM MATER PO 2014. [DOI: 10.1080/00914037.2014.886245] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Li C, Gu J, Mao X, Ao H, Yang X. Preparation of levofloxacin thermo-sensitive gel and clinical application in the treatment of suppurative otitis media. Acta Otolaryngol 2014; 134:468-74. [PMID: 24597493 DOI: 10.3109/00016489.2013.878473] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
CONCLUSION The levofloxacin thermo-sensitive gel prepared using 17% poloxamer 407 (P407) can successfully treat suppurative otitis media (SOM) through the well-controlled release of levofloxacin targeted against the inflammation. OBJECTIVE To evaluate the preparation method and therapeutic effect of levofloxacin thermo-sensitive gel used in the treatment of SOM. METHODS The phase inversion temperatures of 16%, 17%, 18%, 19%, and 20% P407 or P407 solution with 3 mg/ml levofloxacin were determined and the one close to 34(°)C was selected as the optimal concentration. Then a model of SOM was induced by injection of 0.1 ml Staphylococcus aureus (1 × 10(8)/L) in the left ear of 32 Sprague Dawley (SD) rats. Normal saline injected in the right ear was used as the control. Then rats were treated with 0.1 ml normal saline (group A), levofloxacin (group B), P407 (group C), and levofloxacin thermo-sensitive gel (group D) (n = 8). The tympanic membranes were evaluated by otoscopy and hematoxylin and eosin (H&E) staining. RESULTS The optimal concentration of P407 was 17% and the release of levofloxacin in thermo-sensitive gel followed zero-order kinetics. Levofloxacin thermo-sensitive gel and levofloxacin drops could both alleviate the local inflammation in the first 3 days, but levofloxacin drops could not inhibit the recurrence of SOM, while the levofloxacin gel performed continuous drug delivery into inflammation without recurrence.
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Affiliation(s)
- Cong Li
- Department of Otolaryngology, Shanghai 3rd People's Hospital School of Medicine Shanghai Jiao-tong University , Shanghai 201900 , China
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Zhang C, Xu Y, Zhong Q, Li X, Gao P, Feng C, Chu Q, Chen Y, Liu D. In vitro evaluation of the inhibitory potential of pharmaceutical excipients on human carboxylesterase 1A and 2. PLoS One 2014; 9:e93819. [PMID: 24699684 PMCID: PMC3974814 DOI: 10.1371/journal.pone.0093819] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2013] [Accepted: 03/07/2014] [Indexed: 11/19/2022] Open
Abstract
Two major forms of human carboxylesterase (CES), CES1A and CES2, dominate the pharmacokinetics of most prodrugs such as imidapril and irinotecan (CPT-11). Excipients, largely used as insert vehicles in formulation, have been recently reported to affect drug enzyme activity. The influence of excipients on the activity of CES remains undefined. In this study, the inhibitory effects of 25 excipients on the activities of CES1A1 and CES2 were evaluated. Imidapril and CPT-11 were used as substrates and cultured with liver microsomes in vitro. Imidapril hydrolase activities of recombinant CES1A1 and human liver microsomes (HLM) were strongly inhibited by sodium lauryl sulphate (SLS) and polyoxyl 40 hydrogenated castor oil (RH40) [Inhibition constant (Ki) = 0.04 ± 0.01 μg/ml and 0.20 ± 0.09 μg/ml for CES1A1, and 0.12 ± 0.03 μg/ml and 0.76 ± 0.33 μg/ml, respectively, for HLM]. The enzyme hydrolase activity of recombinant CES2 was substantially inhibited by Tween 20 and polyoxyl 35 castor oil (EL35) (K(i) = 0.93 ± 0.36 μg/ml and 4.4 ± 1.24 μg/ml, respectively). Thus, these results demonstrate that surfactants such as SLS, RH40, Tween 20 and EL35 may attenuate the CES activity; such inhibition should be taken into consideration during drug administration.
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Affiliation(s)
- Chengliang Zhang
- Department of Pharmacy, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yanjiao Xu
- Department of Pharmacy, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qiaoni Zhong
- Hubei Pharmaceutical Industry Research Institute Co. Ltd., Wuhan, Hubei, China
| | - Xiping Li
- Department of Pharmacy, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ping Gao
- Department of Pharmacy, Wuhan Children's Hospital, Wuhan, Hubei, China
| | - Chengyang Feng
- Department of Pharmacy, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Qian Chu
- Department of Oncology, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Yuan Chen
- Department of Oncology, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Dong Liu
- Department of Pharmacy, Tongji hospital, Tongji medical school, Huazhong University of Science and Technology, Wuhan, Hubei, China
- * E-mail:
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Zhang K, Shi X, Lin X, Yao C, Shen L, Feng Y. Poloxamer-based in situ hydrogels for controlled delivery of hydrophilic macromolecules after intramuscular injection in rats. Drug Deliv 2014; 22:375-82. [PMID: 24601854 DOI: 10.3109/10717544.2014.891272] [Citation(s) in RCA: 52] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023] Open
Abstract
This study is aimed to investigate the applicability of poloxamer 407 (P407) and 188 (P188)-based temperature-sensitive in situ hydrogel (TSHG) in sustained delivery of hydrophilic macromolecules following intramuscular administration. Polyethylene glycols (PEGs) with molecular weight of 5-, 20-, and 40-kDa were used as model drugs, which can represent the common size range of hydrophilic macromolecular drugs using TSHG. The correlation between the level of poloxamers and thermogelling transition temperatures (Tsol-gel) was established and two formulations "20% P407/10% P188" and "24% P407/10% P188" were chosen for further study. The results showed that the release kinetics of PEGs was close to zero order. Sustained in vivo behaviors were achieved by both of the two formulations for all the PEGs though variations were seen. Lower molecular weight PEG showed more remarkable pharmacokinetic improvements. No significant differences in pharmacokinetics were observed between the two formulations for the same PEG. This suggested that 20-24% P407/10% P188 formulations, with accordingly Tsol-gel in the range of 24.6 °C-31.7 °C, might be freely chosen to achieve comparable pharmacokinetics for hydrophilic macromolecular drugs after intramuscular injection.
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Affiliation(s)
- Kai Zhang
- College of Chinese Materia Medica and
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30
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Kjøniksen AL, Calejo MT, Zhu K, Nyström B, Sande SA. Stabilization of pluronic gels in the presence of different polysaccharides. J Appl Polym Sci 2014. [DOI: 10.1002/app.40465] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Affiliation(s)
- Anna-Lena Kjøniksen
- Department of Pharmacy; School of Pharmacy; University of Oslo; Blindern N-0316 Oslo Norway
- Faculty of Engineering; Østfold University College; P.O. Box 700, N-1757 Halden Norway
| | - Maria Teresa Calejo
- Department of Pharmacy; School of Pharmacy; University of Oslo; Blindern N-0316 Oslo Norway
- Department of Electronics and Communications Engineering; Tampere University of Technology; FI-33101 Tampere Finland
| | - Kaizheng Zhu
- Department of Chemistry; University of Oslo; Blindern N-0315 Oslo Norway
| | - Bo Nyström
- Department of Chemistry; University of Oslo; Blindern N-0315 Oslo Norway
| | - Sverre Arne Sande
- Department of Pharmacy; School of Pharmacy; University of Oslo; Blindern N-0316 Oslo Norway
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31
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Poloxamers as Drug-Delivery Systems: Physicochemical, Pharmaceutical, and Toxicological Aspects. Nanotoxicology 2014. [DOI: 10.1007/978-1-4614-8993-1_13] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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32
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Hawkins AM, Bottom CE, Liang Z, Puleo DA, Hilt JZ. Magnetic nanocomposite sol-gel systems for remote controlled drug release. Adv Healthc Mater 2012. [PMID: 23184692 DOI: 10.1002/adhm.201100013] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
The remote heating of iron oxide nanoparticles in an alternating magnetic field is used to drive a thermoresponsive sol-gel block copolymer, Pluronic® F-127, through the upper phase transition temperature. This phase change triggers an accelerated release rate of a model drug. Actuation and return to baseline levels are demonstrated for multiple AMF doses.
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Affiliation(s)
- Ashley M Hawkins
- Department of Chemical and Materials Engineering, University of Kentucky, 177 F. Paul Anderson Tower, Lexington, KY 40506-0046, USA
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33
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Lee JH, Oh JH, Lee YJ. Effects of experimental hyperlipidaemia on the pharmacokinetics of docetaxel in rats. Xenobiotica 2011; 41:797-804. [PMID: 21561320 DOI: 10.3109/00498254.2011.580019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Hyperlipidaemia correlates with an increased risk of occurrence of various cancers. In this study, the effects of hyperlipidaemia on the pharmacokinetics of docetaxel, a member of the taxane class of anti-cancer drugs, were investigated in rats with experimental hyperlipidaemia; we focused on the alterations in docetaxel metabolism and plasma distribution. Docetaxel (5 mg/kg intravenously (i.v.) and 40 mg/kg per oral (p.o.)) was administered to control rats and rats with poloxamer-407 (P-407)-induced hyperlipidaemia (1 g/kg, intraperitoneally). In vitro studies were conducted on hepatic metabolism in S9 fractions and plasma protein binding using the ultrafiltration method. Hyperlipidaemia dramatically increased the area under the plasma concentration-time curve from time 0 to infinity (AUC(0-∞)) of docetaxel after i.v. (1.86-fold) or p.o. (10.8-fold) administration and decreased total body clearance (0.574-fold) and apparent volume of distribution at steady state (0.615-fold) of docetaxel after i.v. administration. Compared with the control rats, the metabolism of docetaxel by hepatic S9 fractions and the unbound fraction in the plasma in the hyperlipidaemic rats were decreased, i.e., by 20.1 and 79.8%, respectively. In conclusion, the alterations in docetaxel pharmacokinetics in rats with P-407-induced hyperlipidaemia may be due, at least in part, to a decrease in hepatic metabolism and the unbound fraction of docetaxel in the plasma. These findings have potential therapeutic implications for predicting human pharmacokinetic responses to hyperlipidaemia.
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Affiliation(s)
- Joo Hyun Lee
- College of Pharmacy, Kyung Hee University, Seoul, Republic of Korea
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35
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Xuan JJ, Balakrishnan P, Oh DH, Yeo WH, Park SM, Yong CS, Choi HG. Rheological characterization and in vivo evaluation of thermosensitive poloxamer-based hydrogel for intramuscular injection of piroxicam. Int J Pharm 2010; 395:317-23. [DOI: 10.1016/j.ijpharm.2010.05.042] [Citation(s) in RCA: 74] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2010] [Revised: 05/17/2010] [Accepted: 05/27/2010] [Indexed: 10/19/2022]
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Ur-Rehman T, Tavelin S, Gröbner G. Effect of DMSO on micellization, gelation and drug release profile of Poloxamer 407. Int J Pharm 2010; 394:92-8. [PMID: 20472044 DOI: 10.1016/j.ijpharm.2010.05.012] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2010] [Revised: 05/06/2010] [Accepted: 05/08/2010] [Indexed: 11/28/2022]
Abstract
The application of many recently developed or approved drugs and pharmaceuticals is seriously hampered by their low solubility in aqueous media. Hence, numerous promising pharmaceutical delivery systems (including novel "smart" systems based on poloxamer gels, which have highly advantageous thermo-reversible characteristics and low toxicity) cannot solubilize required doses of various drugs without additives such as co-solvents or salts. Therefore, we have studied the effects of dimethyl sulphoxide (DMSO) - a commonly used co-solvent during drug development stages - on the micellization, gelation and dissolution properties of aqueous poloxamer solutions. Differential scanning calorimetry and tube inversion experiments clearly showed that DMSO induces reductions in the critical micellization and gelation temperatures of poloxamer systems. In addition, high resolution solid state (1)H Magic Angle Spinning Nuclear Magnetic Resonance (MAS NMR) analyses provided indications of the specific chemical groups in the poloxamer affected by DMSO, and the molecular mechanism involved. The presence of DMSO accelerated dissolution of the pure gel in water and the release of a hydrophobic drug (flufenamic acid) from poloxamer gel, while it reduced the release of a hydrophilic drug (metoprolol tartrate).
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Affiliation(s)
- Tofeeq Ur-Rehman
- Department of Chemistry, Umeå University, Linnaeusvagen, 90187 Umeå, Sweden
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37
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Rokhade AP, Shelke NB, Patil SA, Aminabhavi TM. Novel hydrogel microspheres of chitosan and pluronic F-127 for controlled release of 5-fluorouracil. J Microencapsul 2008; 24:274-88. [PMID: 17454438 DOI: 10.1080/02652040701281365] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Hydrogel microspheres of chitosan (CS) and Pluronic F127 (PF-127) were prepared by the emulsion-crosslinking method employing glutaraldehyde (GA) as a crosslinker. 5-Fluorouracil (5-FU), an anticancer drug with good water solubility, was encapsulated into hydrogel microspheres. Various formulations were prepared by varying the ratio of CS and PF-127, % drug loading and amount of GA. Microspheres were characterized by Fourier transform infrared (FTIR) spectroscopy to confirm the absence of chemical interactions between drug, polymer and the crosslinking agent. Scanning electron microscopy (SEM) was performed to study the surface morphology of the microspheres. SEM showed that microspheres have smooth shiny surfaces. Particle size, as measured by laser light scattering technique, gave an average size ranging from 110 to 382 microm. Differential scanning calorimetry (DSC) and X-ray diffraction (X-RD) studies were performed to understand the crystalline nature of the drug after encapsulation into hydrogel microspheres. Encapsulation of the drug up to 86% achieved was measured by UV spectroscopy. Equilibrium swelling experiments were performed in distilled water. Diffusion coefficients (D) of water through microspheres were estimated by an empirical equation. In vitro release studies indicated the dependence of release rate on the extent of crosslinking, drug loading and the amount of PF-127 used to produce the microspheres; slow release was extended up to 24 h. The release data were also fitted to an empirical equation to compute the diffusional exponent (n), which indicated that the release mechanism followed the non-Fickian trend.
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Affiliation(s)
- Ajit P Rokhade
- Drug Delivery Division, Center of Excellence in Polymer Science, Karnatak University, Dharwad 580 003, India
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38
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Werle M. Natural and synthetic polymers as inhibitors of drug efflux pumps. Pharm Res 2007; 25:500-11. [PMID: 17896100 PMCID: PMC2265773 DOI: 10.1007/s11095-007-9347-8] [Citation(s) in RCA: 136] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2007] [Accepted: 05/14/2007] [Indexed: 12/15/2022]
Abstract
Inhibition of efflux pumps is an emerging approach in cancer therapy and drug delivery. Since it has been discovered that polymeric pharmaceutical excipients such as Tweens® or Pluronics® can inhibit efflux pumps, various other polymers have been investigated regarding their potential efflux pump inhibitory activity. Among them are polysaccharides, polyethylene glycols and derivatives, amphiphilic block copolymers, dendrimers and thiolated polymers. In the current review article, natural and synthetic polymers that are capable of inhibiting efflux pumps as well as their application in cancer therapy and drug delivery are discussed.
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Affiliation(s)
- Martin Werle
- Department of Pharmaceutical Technology, Leopold-Franzens University Innsbruck, Innrain 52, 6020, Innsbruck, Austria.
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39
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Loh XJ, Goh SH, Li J. Hydrolytic degradation and protein release studies of thermogelling polyurethane copolymers consisting of poly[(R)-3-hydroxybutyrate], poly(ethylene glycol), and poly(propylene glycol). Biomaterials 2007; 28:4113-23. [PMID: 17573109 DOI: 10.1016/j.biomaterials.2007.05.016] [Citation(s) in RCA: 174] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2007] [Accepted: 05/21/2007] [Indexed: 11/29/2022]
Abstract
This paper reports the hydrolytic degradation and protein release studies for a series of newly synthesized thermogelling tri-component multi-block poly(ether ester urethane)s consisting of poly[(R)-3-hydroxybutyrate] (PHB), poly(propylene glycol) (PPG), and poly(ethylene glycol) (PEG). The poly(PEG/PPG/PHB urethane) copolymer hydrogels were hydrolytically degraded in phosphate buffer at pH 7.4 and 37 degrees C for a period of up to 6 months. The mass loss profiles of the copolymer hydrogels were obtained. The hydrogel residues at different time periods of hydrolysis were visualized by scanning electron microscopy, which exhibited increasing porosity with time of hydrolysis. The degradation products in the buffer were characterized by GPC, (1)H NMR, MALDI-TOF, and TGA. The results showed that the ester backbone bonds of the PHB segments were broken by random chain scission, resulting in a decrease in the molecular weight. In addition, the constituents of degradation products were found to be 3-hydroxybutyric acid monomer and oligomers of various lengths (n=1-5). The protein release profiles of the copolymer hydrogels were obtained using BSA as model protein. The results showed that the release rate was controllable by varying the composition of the poly(ether ester urethane)s or by adjusting the concentration of the copolymer in the hydrogels. Finally, we studied the correlation between the protein release characteristics of the hydrogels and their hydrolytic degradation. This is the first example that such a correlation has been attempted for a biodegradable thermogelling copolymer system.
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Affiliation(s)
- Xian Jun Loh
- Institute of Materials Research and Engineering (IMRE), National University of Singapore, 3 Research Link, Singapore 117602, Singapore
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40
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Loh XJ, Goh SH, Li J. New biodegradable thermogelling copolymers having very low gelation concentrations. Biomacromolecules 2007; 8:585-93. [PMID: 17291082 DOI: 10.1021/bm0607933] [Citation(s) in RCA: 195] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
New biodegradable multiblock amphiphilic and thermosensitive poly(ether ester urethane)s consisting of poly[(R)-3-hydroxybutyrate] (PHB), poly(ethylene glycol) (PEG), and poly(propylene glycol) (PPG) blocks were synthesized, and their aqueous solutions were found to undergo a reversible sol-gel transition upon temperature change at very low copolymer concentrations. The multiblock poly(ether ester urethane)s were synthesized from diols of PHB, PEG, and PPG using 1,6-hexamethylene diisocyanate as a coupling reagent. The chemical structures and molecular characteristics of the copolymers were studied by GPC, 1H NMR, 13C NMR, and FTIR. The thermal stability of the poly(PEG/PPG/PHB urethane)s was studied by thermogravimetry analysis (TGA), and the PHB contents were calculated based on the thermal degradation profile. The results were in good agreement with those obtained from the 1H NMR measurements. The poly(PEG/PPG/ PHB urethane)s presented better thermal stability than the PHB precursors. The water soluble poly(ether ester urethane)s had very low critical micellization concentration (CMC). Aqueous solutions of the new poly(ether ester urethane)s underwent a sol-gel-sol transition as the temperature increased from 4 to 80 degrees C, and showed a very low critical gelation concentration (CGC) ranging from 2 to 5 wt %. As a result of its multiblock architecture, a novel associated micelle packing model can be proposed for the sol-gel transition for the copolymer gels of this system. The new material is thought to be a promising candidate for injectable drug systems that can be formulated at low temperatures and forms a gel depot in situ upon subcutaneous injection.
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Affiliation(s)
- Xian Jun Loh
- Institute of Materials Research and Engineering, National University of Singapore, 3 Research Link, Singapore 117602
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41
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Dumortier G, Grossiord JL, Agnely F, Chaumeil JC. A review of poloxamer 407 pharmaceutical and pharmacological characteristics. Pharm Res 2006; 23:2709-28. [PMID: 17096184 DOI: 10.1007/s11095-006-9104-4] [Citation(s) in RCA: 797] [Impact Index Per Article: 44.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2006] [Accepted: 06/27/2006] [Indexed: 12/16/2022]
Abstract
Poloxamer 407 copolymer (ethylene oxide and propylene oxide blocks) shows thermoreversible properties, which is of the utmost interest in optimising drug formulation (fluid state at room temperature facilitating administration and gel state above sol-gel transition temperature at body temperature promoting prolonged release of pharmacological agents). Pharmaceutical evaluation consists in determining the rheological behaviour (flow curve or oscillatory studies), sol-gel transition temperature, in vitro drug release using either synthetic or physiological membrane and (bio)adhesion characteristics. Poloxamer 407 formulations led to enhanced solubilisation of poorly water-soluble drugs and prolonged release profile for many galenic applications (e.g., oral, rectal, topical, ophthalmic, nasal and injectable preparations) but did not clearly show any relevant advantages when used alone. Combination with other excipients like Poloxamer 188 or mucoadhesive polymers promotes Poloxamer 407 action by optimising sol-gel transition temperature or increasing bioadhesive properties. Inclusion of liposomes or micro(nano)particles in Poloxamer 407 formulations offers interesting prospects, as well. Besides these promising data, Poloxamer 407 has been held responsible for lipidic profile alteration and possible renal toxicity, which compromises its development for parenteral applications. In addition, new findings have demonstrated immuno-modulation and cytotoxicity-promoting properties of Poloxamer 407 revealing significant pharmacological interest and, hence, human trials are in progress to specify these potential applications.
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Affiliation(s)
- Gilles Dumortier
- Laboratoire de Galénique, UPRES EA 2498, Faculté des Sciences Pharmaceutiques et Biologiques (Université Paris 5), 4, Avenue de l'Observatoire, 75270, Paris Cedex 06, France.
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42
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Leon C, Wasan KM, Sachs-Barrable K, Johnston TP. Acute P-407 administration to mice causes hypercholesterolemia by inducing cholesterolgenesis and down-regulating low-density lipoprotein receptor expression. Pharm Res 2006; 23:1597-607. [PMID: 16783477 DOI: 10.1007/s11095-006-0276-8] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2006] [Accepted: 02/23/2006] [Indexed: 10/24/2022]
Abstract
PURPOSE Poloxamer 407 (P-407) is a chemical that induces a dose-controlled dyslipidemia in mice. Our aim was to determine the acute effects of P-407 treatment on the mechanisms that influence hepatic cholesterol homeostasis. METHODS We measured lipid levels in plasma and liver samples from control and P-407-treated mice (24 h post-i.p. injection of 0.5 g kg(-1) of P-407 or saline for the control mice). We measured acyl-coenzyme A:cholesterol acyltransferase (ACAT) and 3-hydroxy-3-methylglutaryl coenzyme A (HMG-CoA) reductase activities in liver microsomes. The protein expression of ACAT2, scavenger receptor class B, type I (SR-BI), ATP-binding cassette transporter A1 (ABCA1), ATP-binding cassette transporter G8 (ABCG8), low-density lipoprotein receptor (LDLr), and actin was measured by immunoblot. RESULTS We found an increase in plasma cholesterol and triglyceride levels as well as increased hepatic cholesteryl esters (CE) in P-407-treated mice. The hepatic ACAT microsomal activity and ACAT2 protein expression were not altered by P-407. The protein expression of the LDLr was decreased in the livers of P-407-treated mice. This decrease was specific, because the expression of the SR-BI was unchanged. The P-407-induced hypercholesterolemia was accounted for by increased activity and protein expression of HMG-CoA reductase. ATP-binding cassette transporters A1 and G8 protein expression were not significantly different in P-407-treated mice compared to controls. CONCLUSIONS The increased hepatic CE levels, following P-407 treatment, was neither related to an up-regulation of ACAT2 nor enhanced SR-BI expression. Hypercholesterolemia was associated with an up-regulation of both the protein expression and activity of HMG-CoA reductase and decreased LDLr expression.
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Affiliation(s)
- Carlos Leon
- Division of Pharmaceutics and Biopharmaceutics, Faculty of Pharmaceutical Sciences, University of British Columbia, Vancouver, British Columbia, Canada
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43
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Ruel-Gariépy E, Leroux JC. In situ-forming hydrogels--review of temperature-sensitive systems. Eur J Pharm Biopharm 2005; 58:409-26. [PMID: 15296964 DOI: 10.1016/j.ejpb.2004.03.019] [Citation(s) in RCA: 825] [Impact Index Per Article: 43.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2004] [Accepted: 03/08/2004] [Indexed: 10/26/2022]
Abstract
In the past few years, an increasing number of in situ-forming systems have been reported in the literature for various biomedical applications, including drug delivery, cell encapsulation, and tissue repair. There are several possible mechanisms that lead to in situ gel formation: solvent exchange, UV-irradiation, ionic cross-linkage, pH change, and temperature modulation. The thermosensitive approach can be advantageous for particular applications as it does not require organic solvents, co-polymerization agents, or an externally applied trigger for gelation. In the last 2 decades, several thermosensitive formulations have been proposed. This manuscript focuses on aqueous polymeric solutions that form implants in situ in response to temperature change, generally from ambient to body temperature. It mainly reviews the characterization and use of polysaccharides, N-isopropylacrylamide copolymers, poly(ethylene oxide-b-propylene oxide-b-ethylene oxide) (poloxamer) and its copolymers, poly(ethylene oxide)/(D,L-lactic acid-co-glycolic acid) copolymers, and thermosensitive liposome-based systems.
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Affiliation(s)
- Eve Ruel-Gariépy
- Canada Research Chair in Drug Delivery, Faculty of Pharmacy, University of Montreal, Montreal, Que, Canada
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44
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Raymond J, Metcalfe A, Salazkin I, Schwarz A. Temporary vascular occlusion with poloxamer 407. Biomaterials 2004; 25:3983-9. [PMID: 15046888 DOI: 10.1016/j.biomaterials.2003.10.085] [Citation(s) in RCA: 64] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2003] [Accepted: 10/10/2003] [Indexed: 11/26/2022]
Abstract
There is a need for safe and reversible occlusions during percutaneous endovascular procedures. Poloxamer 407 is a non-ionic surfactant with rapid reversible sol-gel transition behaviour. The safety and efficacy of this polymer as a temporary embolic agent was investigated. First, dissolution time after gelation of poloxamer was determined in an in vitro model. Then, transient poloxamer occlusion of renal and pulmonary arteries of seven dogs was followed by serial angiograms. Macroscopic and pathological changes were studied 1 week later. This experiment was repeated in similar arteries in one pig, and in auricular arteries of two rabbits. Poloxamer dissolution after in vitro polymerization was completed within 1-20 h, depending on concentrations. In vivo poloxamer 22% injections led to complete occlusion, followed by full recanalization within 10-90 min without complication. The only biochemical effect of poloxamer occlusions was transient elevation of triglyceride levels. There were no pathological abnormalities at 1 week. Poloxamer 407 could be used as an embolic material for temporary occlusions.
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Affiliation(s)
- Jean Raymond
- Interventional Neuroradiology Laboratory, CHUM Research Center, Notre-Dame Hospital, Mailloux Pavilion M-8206, 1560 Sherbrooke East, Montreal, Que., Canada H2L 4M1.
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Shishido SM, Seabra AB, Loh W, Ganzarolli de Oliveira M. Thermal and photochemical nitric oxide release from S-nitrosothiols incorporated in Pluronic F127 gel: potential uses for local and controlled nitric oxide release. Biomaterials 2003; 24:3543-53. [PMID: 12809783 DOI: 10.1016/s0142-9612(03)00153-4] [Citation(s) in RCA: 144] [Impact Index Per Article: 6.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
The local delivery of nitric oxide (nitrogen monoxide, NO) by thermal or photochemical means to target cells or organs has a great potential in several biomedical applications, especially if the NO donors are incorporated into non-toxic viscous matrices. In this work, we have shown that the NO donors S-nitrosoglutathione (GSNO) and S-nitroso-N-acetylcysteine (SNAC) can be incorporated into F127 hydrogels, from where NO can be released thermally or photochemically (with lambda(irr)>480nm). High sensitivity differential scanning calorimetry (HSDSC) and a new spectrophotometric method, were used to characterize the micellization and the reversal thermal gelation processes of the F127 hydrogels containing NO donors, and to modulate the gelation temperatures to the range 29-32 degrees C. Spectral monitoring of the S-NO bond cleavage showed that the initial rates of thermal and photochemical NO release (ranging from 2 to 45 micromoll(-1)min(-1)) are decreased in the hydrogel matrices, relative to those obtained in aqueous solutions. This stabilization effect was assigned to a cage recombination mechanism and offers an additional advantage for the storage and handling of S-nitrosothiols. These results indicate that F127 hydrogels might be used for the thermal and photochemical delivery of NO from S-nitrosothiols to target areas in biomedical applications.
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Affiliation(s)
- Sílvia Mika Shishido
- Instituto de Química, Universidade Estadual de Campinas (UNICAMP), CP 6154, Campinas, SP 13083-970, Brazil
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Kabanov AV, Batrakova EV, Miller DW. Pluronic block copolymers as modulators of drug efflux transporter activity in the blood-brain barrier. Adv Drug Deliv Rev 2003; 55:151-64. [PMID: 12535579 DOI: 10.1016/s0169-409x(02)00176-x] [Citation(s) in RCA: 241] [Impact Index Per Article: 11.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Drug efflux transporters can influence the absorption, tissue distribution and elimination of many therapeutic agents. Modulation of drug efflux transporter activity is being explored as a means for improving the pharmacokinetic and pharmacodynamic properties of various drugs. In this regard, several polymer formulations have been shown to inhibit drug efflux transporters such as P-glycoprotein (P-gp). The current review will focus on Pluronic block copolymers in particular, the mechanisms involved in the effects of Pluronic on drug efflux transporters, and the optimal polymer compositions required for inhibition of drug efflux transporters. Special emphasis will be placed on the potential applications of Pluronic in enhancing the blood-brain barrier (BBB) penetration of drugs.
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Affiliation(s)
- Alexander V Kabanov
- Department of Pharmaceutical Sciences, University of Nebraska Medical Center, 986025 Nebraska Medical Center, Omaha, NE 68198, USA.
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Johnston TP, Coker JW, Paigen BJ, Tawfik O. Sex does not seem to influence the formation of aortic lesions in the P-407-induced mouse model of hyperlipidemia and atherosclerosis. J Cardiovasc Pharmacol 2002; 39:404-11. [PMID: 11862120 DOI: 10.1097/00005344-200203000-00012] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
Coronary heart disease secondary to atherosclerosis is the leading cause of death for men in the United States. Using a new, nontransgenic, non-fat-fed mouse model of hyperlipidemia and atherosclerosis developed in our laboratory, we investigated the effect of sex on lipid profiles and subsequent aortic atherosclerotic lesion formation. Female and male C57BL/6 mice, which consumed a low-fat diet, were treated with either normal saline or poloxamer 407 (P-407), a triblock copolymer comprised of poly(oxyethylene) and poly(oxypropylene) units, for 4 months. Blood samples were obtained at 0, 1, 2, 3, and 4 months, whereas hearts and livers were harvested only at 4 months, because this model requires approximately 4 months for significant atheroma formation. P-407-treated mice of either sex demonstrated a profound increase in plasma cholesterol and triglyceride; at 3 and 4 months the plasma lipids were significantly (p < 0.05) higher for male mice compared with female mice. Aortas retrieved from P-407-treated mice of either sex after 4 months demonstrated a significant (p < 0.001) increase in the mean atherosclerotic lesion size compared with their respective saline-treated controls, but there was no significant (p > 0.05) difference between lesion sizes for P-407-treated male mice (1.02 +/- 0.074 x 10(5) microm(2)) compared with P-407-treated female mice (1.14 +/- 0.28 x 10(5) microm(2)). Livers harvested at 4 months from either sex of P-407-treated mice displayed no damage to hepatocytes but increased proliferation of macrophages (Kupffer cells), which contained sequestered lipids. Thus, male C57BL/6 mice form atherosclerotic lesions as extensive as female mice in the P-407 mouse model of atherosclerosis.
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Affiliation(s)
- Thomas P Johnston
- Division of Pharmaceutical Sciences, School of Pharmacy, University of Missouri, Kansas City, MO 64110-2499, USA.
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