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Hancock DG, Berry L, Scott NM, Mincham KT, Ditcham W, Larcombe AN, Clements B. Treatment with inhaled aerosolised ethanol reduces viral load and potentiates macrophage responses in an established influenza mouse model. Exp Lung Res 2024; 50:118-126. [PMID: 38683138 DOI: 10.1080/01902148.2024.2346320] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 04/17/2024] [Indexed: 05/01/2024]
Abstract
AIM Treatment options for viral lung infections are currently limited. We aimed to explore the safety and efficacy of inhaled ethanol in an influenza-infection mouse model. MATERIALS AND METHODS In a safety and tolerability experiment, 80 healthy female BALB/c mice (20 per group) were exposed to nebulized saline (control) or three concentrations of ethanol (40/60/80% ethanol v/v in water) for 3x30-minute periods, with a two-hour break between exposures. In a separate subsequent experiment, 40 Female BALB/c mice were nasally inoculated with 104.5 plaque-forming units of immediate virulence "Mem71" influenza. Infection was established for 48-h before commencing treatment in 4 groups of 10 mice with either nebulized saline (control) or one of 3 different concentrations of ethanol (40/60/80% ethanol v/v in water) for 3x30-minute periods daily over three consecutive days. In both experiments, mouse behavior, clinical scores, weight change, bronchoalveolar lavage cell viability, cellular composition, and cytokine levels, were assessed 24-h following the final exposure, with viral load also assessed after the second experiment. RESULTS In uninfected BALB/c mice, 3x30-minute exposures to nebulized 40%, 60%, and 80% ethanol resulted in no significant differences in mouse weights, cell counts/viability, cytokines, or morphometry measures. In Mem71-influenza infected mice, we observed a dose-dependent reduction in viral load in the 80%-treated group and potentiation of macrophage numbers in the 60%- and 80%-treated groups, with no safety concerns. CONCLUSIONS Our data provides support for inhaled ethanol as a candidate treatment for respiratory infections.
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Affiliation(s)
- David G Hancock
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Luke Berry
- Respiratory Environmental Health, Wal-yan Respiratory Research Centre, Telethon Kids Institute, Nedlands, WA, Australia
| | - Naomi M Scott
- Respiratory Environmental Health, Wal-yan Respiratory Research Centre, Telethon Kids Institute, Nedlands, WA, Australia
| | - Kyle T Mincham
- Respiratory Environmental Health, Wal-yan Respiratory Research Centre, Telethon Kids Institute, Nedlands, WA, Australia
- National Heart and Lung Institute, Imperial College London, London, UK
| | - William Ditcham
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
| | - Alexander N Larcombe
- Respiratory Environmental Health, Wal-yan Respiratory Research Centre, Telethon Kids Institute, Nedlands, WA, Australia
- Occupation, Environment and Safety, School of Population Health, Curtin University, Perth, WA, Australia
| | - Barry Clements
- Wal-yan Respiratory Research Centre, Telethon Kids Institute, University of Western Australia, Perth, WA, Australia
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Fung ES, Parker JA, Powell AM, Maier A. Estimating inhalation bioavailability for peptides and proteins 1 to 10 kDa in size. Regul Toxicol Pharmacol 2022; 137:105314. [PMID: 36463983 DOI: 10.1016/j.yrtph.2022.105314] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2022] [Revised: 11/25/2022] [Accepted: 11/30/2022] [Indexed: 12/05/2022]
Abstract
Inhalation is a critical route for occupational exposure. To protect workers from adverse effects, health-based exposure limits (HBELs) are derived using chemical-specific information including inhalation bioavailability. Inhalation bioavailability of large proteins is well studied and generally accepted to be 1% or less. However, the inhalation bioavailability of peptides and proteins 1-10 kDa in size is not well defined. The goal of this study was to expand upon previous analyses and evaluate the inhalation bioavailability of small peptides. Inhalation bioavailability data for 72 peptides and protein samples ranging from 1.1 to 10.9 kDa in size were evaluated. The median inhalation bioavailability was 20%, which is in agreement with previously published analyses. Inhalation bioavailabilities for the vast majority were below 50%. Interestingly, species, peptide size, and peptide identity did not correlate with inhalation bioavailability. Other factors including inhalation dosimetry, peptide degradation, and chemical characteristics also decrease the amount of peptide available for absorption. Together, the median bioavailability of 20% is likely an appropriate estimate of systemic exposure and is sufficiently protective in most cases for the purposes of occupational exposure safety. Thus, in the absence of peptide-specific data or concerns, an inhalation bioavailability default of 20% is recommended for 1-10 kDa peptide and proteins.
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Luo MX, Hua S, Shang QY. Application of nanotechnology in drug delivery systems for respiratory diseases (Review). Mol Med Rep 2021; 23:325. [PMID: 33760125 PMCID: PMC7974419 DOI: 10.3892/mmr.2021.11964] [Citation(s) in RCA: 24] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Accepted: 01/28/2021] [Indexed: 12/17/2022] Open
Abstract
Respiratory disease is a common disease with a high incidence worldwide, which is a serious threat to human health, and is considered a societal and economic burden. The application of nanotechnology in drug delivery systems has created new treatments for respiratory diseases. Within this context, the present review systematically introduced the physicochemical properties of nanoparticles (NPs); reviewed the current research status of different nanocarriers in the treatment of respiratory diseases, including liposomes, solid lipid nanocarriers, polymeric nanocarriers, dendrimers, inorganic nanocarriers and protein nanocarriers; and discussed the main advantages and limitations of therapeutic nanomedicine in this field. The application of nanotechnology overcomes drug inherent deficiencies to a certain extent, and provides unlimited potential for the development of drugs to treat respiratory diseases. However, most of the related research work is in the preclinical experimental stage and safety assessment is still a challenging task. Future studies are needed to focus on the performance modification, molecular mechanism and potential toxicity of therapeutic nanomedicine.
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Affiliation(s)
- Ming-Xin Luo
- Department of Respiratory Medicine, Anhui Provincial Children's Hospital, Hefei, Anhui 230000, P.R. China
| | - Shan Hua
- Department of Respiratory Medicine, Anhui Provincial Children's Hospital, Hefei, Anhui 230000, P.R. China
| | - Qi-Yun Shang
- Department of Respiratory Medicine, Anhui Provincial Children's Hospital, Hefei, Anhui 230000, P.R. China
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Castro-Balado A, Mondelo-García C, Barbosa-Pereira L, Varela-Rey I, Novo-Veleiro I, Vázquez-Agra N, Antúnez-López JR, Bandín-Vilar EJ, Sendón-García R, Busto-Iglesias M, Rodríguez-Bernaldo de Quirós A, García-Quintanilla L, González-Barcia M, Zarra-Ferro I, Otero-Espinar FJ, Rey-Bretal D, Lago-Quinteiro JR, Valdés-Cuadrado L, Rábade-Castedo C, del Río-Garma MC, Crespo-Diz C, Delgado-Sánchez O, Aguiar P, Barbeito-Castiñeiras G, Pérez del Molino-Bernal ML, Trastoy-Pena R, Passannante R, Llop J, Pose-Reino A, Fernández-Ferreiro A. Development and Characterization of Inhaled Ethanol as a Novel Pharmacological Strategy Currently Evaluated in a Phase II Clinical Trial for Early-Stage SARS-CoV-2 Infection. Pharmaceutics 2021; 13:342. [PMID: 33808025 PMCID: PMC7999202 DOI: 10.3390/pharmaceutics13030342] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2021] [Revised: 02/26/2021] [Accepted: 03/02/2021] [Indexed: 12/15/2022] Open
Abstract
Inhaled administration of ethanol in the early stages of COVID-19 would favor its location on the initial replication sites, being able to reduce the progression of the disease and improving its prognosis. Before evaluating the efficacy and safety of this novel therapeutic strategy in humans, its characterization is required. The developed 65° ethanol formulation is stable at room temperature and protected from light for 15 days, maintaining its physicochemical and microbiological properties. Two oxygen flows have been tested for its administration (2 and 3 L/min) using an automated headspace gas chromatographic analysis technique (HS-GC-MS), with that of 2 L/min being the most appropriate one, ensuring the inhalation of an ethanol daily dose of 33.6 ± 3.6 mg/min and achieving more stable concentrations during the entire treatment (45 min). Under these conditions of administration, the formulation has proven to be safe, based on histological studies of the respiratory tracts and lungs of rats. On the other hand, these results are accompanied by the first preclinical molecular imaging study with radiolabeled ethanol administered by this route. The current ethanol formulation has received approval from the Spanish Agency of Medicines and Medical Devices for a phase II clinical trial for early-stage COVID-19 patients, which is currently in the recruitment phase (ALCOVID-19; EudraCT number: 2020-001760-29).
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Affiliation(s)
- Ana Castro-Balado
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
- Pharmacology, Pharmacy and Pharmaceutical Technology Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain;
| | - Cristina Mondelo-García
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
| | - Letricia Barbosa-Pereira
- Analytical Chemistry, Nutrition and Food Science Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (L.B.-P.); (R.S.-G.); (A.R.-B.d.Q.)
| | - Iria Varela-Rey
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
- Pharmacology, Pharmacy and Pharmaceutical Technology Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain;
| | - Ignacio Novo-Veleiro
- Internal Medicine Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (I.N.-V.); (N.V.-A.)
| | - Néstor Vázquez-Agra
- Internal Medicine Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (I.N.-V.); (N.V.-A.)
| | - José Ramón Antúnez-López
- Pathological Anatomy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain;
| | - Enrique José Bandín-Vilar
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
| | - Raquel Sendón-García
- Analytical Chemistry, Nutrition and Food Science Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (L.B.-P.); (R.S.-G.); (A.R.-B.d.Q.)
| | - Manuel Busto-Iglesias
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
| | - Ana Rodríguez-Bernaldo de Quirós
- Analytical Chemistry, Nutrition and Food Science Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain; (L.B.-P.); (R.S.-G.); (A.R.-B.d.Q.)
| | - Laura García-Quintanilla
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
- Pharmacology, Pharmacy and Pharmaceutical Technology Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain;
| | - Miguel González-Barcia
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
| | - Irene Zarra-Ferro
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
| | - Francisco J. Otero-Espinar
- Pharmacology, Pharmacy and Pharmaceutical Technology Department, Faculty of Pharmacy, University of Santiago de Compostela (USC), 15782 Santiago de Compostela, Spain;
| | - David Rey-Bretal
- Molecular Image Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain; (D.R.-B.); (P.A.)
| | - José Ramón Lago-Quinteiro
- Pneumology Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (J.R.L.-Q.); (L.V.-C.); (C.R.-C.)
| | - Luis Valdés-Cuadrado
- Pneumology Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (J.R.L.-Q.); (L.V.-C.); (C.R.-C.)
| | - Carlos Rábade-Castedo
- Pneumology Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (J.R.L.-Q.); (L.V.-C.); (C.R.-C.)
| | - María Carmen del Río-Garma
- Clinical Analytic Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain;
| | - Carlos Crespo-Diz
- Pharmacy Department, University Clinical Hospital of Pontevedra (SERGAS), 36162 Pontevedra, Spain;
| | | | - Pablo Aguiar
- Molecular Image Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain; (D.R.-B.); (P.A.)
| | - Gema Barbeito-Castiñeiras
- Microbiology Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (G.B.-C.); (M.L.P.d.M.-B.); (R.T.-P.)
| | - María Luisa Pérez del Molino-Bernal
- Microbiology Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (G.B.-C.); (M.L.P.d.M.-B.); (R.T.-P.)
| | - Rocío Trastoy-Pena
- Microbiology Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (G.B.-C.); (M.L.P.d.M.-B.); (R.T.-P.)
| | - Rossana Passannante
- Radiochemistry Department, CIC biomaGUNE, Parque Tecnológico de San Sebastian, 20009 San Sebastián, Spain;
| | - Jordi Llop
- Radiochemistry Department, CIC biomaGUNE, Parque Tecnológico de San Sebastian, 20009 San Sebastián, Spain;
| | - Antonio Pose-Reino
- Internal Medicine Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (I.N.-V.); (N.V.-A.)
| | - Anxo Fernández-Ferreiro
- Pharmacy Department, University Clinical Hospital of Santiago de Compostela (SERGAS), 15706 Santiago de Compostela, Spain; (A.C.-B.); (C.M.-G.); (I.V.-R.); (E.J.B.-V.); (M.B.-I.); (L.G.-Q.); (M.G.-B.); (I.Z.-F.)
- Clinical Pharmacology Group, Health Research Institute of Santiago de Compostela (IDIS), 15706 Santiago de Compostela, Spain
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Hickey R, Palmer AF. Synthesis of Hemoglobin-Based Oxygen Carrier Nanoparticles By Desolvation Precipitation. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2020; 36:14166-14172. [PMID: 33205655 DOI: 10.1021/acs.langmuir.0c01698] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Hemoglobin (Hb)-based oxygen carriers (HBOCs) present an alternative to red blood cells (RBCs) when blood is not available. However, the most widely used synthesis techniques have fundamental flaws, which may have contributed toward disappointing clinical application. Polymerized Hb contains a heterogeneous distribution of particle size and shape, while Hb encapsulation inside liposomes results in high lipid burden and low Hb content. Meanwhile, there are a variety of other nanoparticle synthetic techniques which, having found success as drug delivery vehicles, may be well suited to function as an HBOC. We synthesized desolvated Hb nanoparticles (Hb-dNPs) with diameters of approximately 250 nm by the controlled precipitation of Hb with ethanol. Oxidized dextran was found to be an effective surface stabilizing agent that maintained particle integrity. In vitro biophysical characterization showed a high-affinity oxygen delivery profile (P50 = 7.72 mm Hg), suggesting a potential for therapeutic use and opening a new avenue for HBOC research.
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Affiliation(s)
- Richard Hickey
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
| | - Andre F Palmer
- William G. Lowrie Department of Chemical and Biomolecular Engineering, The Ohio State University, Columbus, Ohio 43210, United States
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6
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Making Concentrated Antibody Formulations Accessible for Vibrating-Mesh Nebulization. J Pharm Sci 2019; 108:2588-2592. [DOI: 10.1016/j.xphs.2019.03.009] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2018] [Revised: 02/17/2019] [Accepted: 03/08/2019] [Indexed: 01/03/2023]
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7
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Parilti R, Caprasse J, Riva R, Alexandre M, Vandegaart H, Bebrone C, Dupont-Gillain C, Howdle SM, Jérôme C. Antimicrobial peptide encapsulation and sustained release from polymer network particles prepared in supercritical carbon dioxide. J Colloid Interface Sci 2018; 532:112-117. [PMID: 30077061 DOI: 10.1016/j.jcis.2018.07.125] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Accepted: 07/28/2018] [Indexed: 11/17/2022]
Abstract
Antimicrobial peptide loaded poly(2-hydroxyethyl methacrylate) particles were synthesized in supercritical carbon dioxide via one-pot free-radical dispersion polymerisation of 2-hydroxyethyl methacrylate and a cross-linker. Discrete particles with a well-defined spherical morphology and a diameter as low as 450 nm have been obtained in mild conditions. The encapsulation and release of the peptide were confirmed by antimicrobial tests that demonstrated for the first time a sustained release of the peptide from poly(2-hydroxyethyl methacrylate) microgels prepared by one-pot dispersion polymerization in supercritical carbon dioxide and then dispersed in water.
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Affiliation(s)
- Rahmet Parilti
- CERM, CESAM Research Unit, University of Liege, 13, Allée du Six Août, B-4000 Liege, Belgium; School of Chemistry, University of Nottingham, University Park, NG7 2RD Nottingham, United Kingdom
| | - Jérémie Caprasse
- CERM, CESAM Research Unit, University of Liege, 13, Allée du Six Août, B-4000 Liege, Belgium
| | - Raphaël Riva
- CERM, CESAM Research Unit, University of Liege, 13, Allée du Six Août, B-4000 Liege, Belgium
| | | | | | - Carine Bebrone
- Symbiose Biomaterials, Avenue de l'Hôpital, 1, 4000-Liege, Belgium
| | - Christine Dupont-Gillain
- Institute of Condensed Matter and Nanosciences (IMCN), Bio and Soft Matter Division (BSMA), Université Catholique de Louvain, Place Louis Pasteur 1, 1348 Louvain-la-Neuve, Belgium
| | - Steven M Howdle
- School of Chemistry, University of Nottingham, University Park, NG7 2RD Nottingham, United Kingdom
| | - Christine Jérôme
- CERM, CESAM Research Unit, University of Liege, 13, Allée du Six Août, B-4000 Liege, Belgium.
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Pulmonary absorption – estimation of effective pulmonary permeability and tissue retention of ten drugs using an ex vivo rat model and computational analysis. Eur J Pharm Biopharm 2018; 124:1-12. [DOI: 10.1016/j.ejpb.2017.11.013] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Revised: 11/23/2017] [Accepted: 11/26/2017] [Indexed: 11/20/2022]
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9
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Parilti R, Alaimo D, Grignard B, Boury F, Howdle SM, Jérôme C. Mild synthesis of poly(HEMA)-networks as well-defined nanoparticles in supercritical carbon dioxide. J Mater Chem B 2017; 5:5806-5815. [PMID: 32264214 DOI: 10.1039/c7tb00740j] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Abstract
Free-radical dispersion polymerisation of 2-hydroxyethyl methacrylate was carried out in supercritical carbon dioxide (scCO2) in the presence of stabilisers based on polyethylene oxide (PEO) and poly(heptadecafluorodecyl acrylate) (PFDA). Different architectures of copolymers (random, palm-tree and diblock) were tested for their surface tension, cloud point and as a stabilising agent. The diblock architecture was found to be the best candidate resulting in poly(HEMA) spherical particles with a size of 316 nm. Furthermore, the effect of the CO2-phobic block (PEO) in the diblock architecture was investigated by using three different chain lengths (1000, 2000, 5000 g mol-1). By optimizing the stabiliser composition and structure, mild reaction conditions have been identified allowing us to obtain well-defined spherical cross-linked poly(HEMA) particles with a mean diameter of unprecedented low size (216 nm) at a temperature as low as 35 °C.
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Affiliation(s)
- R Parilti
- Center for Education and Research on Macromolecules (CERM), University of Liège (ULg), CESAM RU, Sart Tilman, Building B6a-third floor, Liège, B-4000, Belgium.
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Agrawal P, Soni S, Mittal G, Bhatnagar A. Preclinical safety evaluation of submicronized sildenafil citrate nebulization solution in small experimental animals. Exp Lung Res 2015; 41:450-8. [DOI: 10.3109/01902148.2015.1064492] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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11
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Sultana S, Ali R, Talegaonkar S, Ahmad FJ, Mittal G, Bhatnagar A. In vivo lung deposition and sub-acute inhalation toxicity studies of nano-sized alendronate sodium as an antidote for inhaled toxic substances in Sprague Dawley rats. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2013; 36:636-647. [PMID: 23851119 DOI: 10.1016/j.etap.2013.05.016] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/19/2013] [Revised: 05/17/2013] [Accepted: 05/31/2013] [Indexed: 06/02/2023]
Abstract
INTRODUCTION Alendronate sodium is a bisphosphonate agent used for the treatment of osteoporosis and other bone diseases. It has a strong chelating property to bind or, to some extent, counteract the effects of substances, such as magnesium, calcium citrate, ferrous fumarate, carbonyl iron, as well as the zinc gluconate, sulfate and acetate salts. The objective of the present study was to evaluate lung deposition and sub-acute inhalation toxicity of the alendronate sodium respiratory formulation. METHODS Particle dimension of aerosols of alendronate was measured using a particle size analyzer. Alendronate was radiolabeled using Technetium-99m for in vitro and in vivo biodistribution studies. Alendronate at doses, 0.5%, 1.0%, and 1.5% in ethanol-saline respiratory formulation was inhaled twice a day up to 5 weeks for inhalation toxicity investigations. Hematological, biochemical and lung toxicity biomarkers in bronchoalveolar lavage (BAL) fluid were determined at the end of the experiment. Histopathological analysis of lung tissues was carried out to observe any microscopic changes RESULTS Particle size analysis revealed the size within 300-500nm. Anderson cascade impactor results showed that the particles exhibited higher respirable fraction (55.52%) with MMAD of 4.66μm. Hematology, serum biochemistry and lung toxicity biomarkers in BAL fluid performed in the sub-acute toxicity studies indicated no adverse effects of alendronate sodium inhalation except for a significant increase in cholesterol levels and marginal increase in BAL fluid protein. At autopsy, no histopathological changes in major organs were observed. CONCLUSIONS The lung deposition and safety evaluation data observed from these studies suggested that aerosolized nanosized alendronate sodium by the inhalation route could be a new and promising route of administration as an antidote to radioactive substances through an increase in the bioavailability of the drug as well as a decrease in side effects on systemic delivery.
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Affiliation(s)
- Shaheen Sultana
- Jamia Hamdard, Faculty of Pharmacy, Department of Pharmaceutics, Delhi 110062, India.
| | - Rashid Ali
- Institute of Nuclear Medicine and Allied Sciences, Department of Nuclear Medicine, DRDO, Brig. S K Mazumdar Marg, Delhi 110054, India.
| | - Sushama Talegaonkar
- Jamia Hamdard, Faculty of Pharmacy, Department of Pharmaceutics, Delhi 110062, India.
| | - Farhan Jalees Ahmad
- Jamia Hamdard, Faculty of Pharmacy, Department of Pharmaceutics, Delhi 110062, India.
| | - Gaurav Mittal
- Institute of Nuclear Medicine and Allied Sciences, Department of Nuclear Medicine, DRDO, Brig. S K Mazumdar Marg, Delhi 110054, India.
| | - Aseem Bhatnagar
- Institute of Nuclear Medicine and Allied Sciences, Department of Nuclear Medicine, DRDO, Brig. S K Mazumdar Marg, Delhi 110054, India.
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Grondin Y, Cotanche DA, Manneberg O, Molina R, Treviño-Villarreal JH, Sepulveda R, Clifford R, Bortoni ME, Forsberg S, Labrecque B, Altshul L, Brain JD, Jackson RL, Rogers RA. Pulmonary delivery of d-methionine is associated with an increase in ALCAR and glutathione in cochlear fluids. Hear Res 2013; 298:93-103. [PMID: 23296212 DOI: 10.1016/j.heares.2012.12.011] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/25/2012] [Revised: 11/28/2012] [Accepted: 12/17/2012] [Indexed: 12/11/2022]
Abstract
In animals, hearing loss resulting from cochlear mechanosensory cell damage can be mitigated by antioxidants such as d-methionine (d-met) and acetyl-l-carnitine (ALCAR). The systemic routes of administration of these compounds, that must of necessity transit trough the cochlear fluids, may affect the antioxidant levels in the cochlea and the resulting oto-protective effect. In this study, we analyzed the pharmacokinetics of [(14)C]d-met in the cochlea and four other tissues after intratracheal (IT), intranasal (IN), and oral by gavage (OG) administration and compared it to intravenous administration (IV). We then analyzed the effect of these four routes on the antioxidant content of the cochlear fluids after d-met or ALCAR administration, by liquid chromatography/mass spectrometry. Our results showed that the concentration of methionine and ALCAR in cochlear fluids significantly increased after their respective systemic administration. Interestingly, d-met administration also contributed to an increase of ALCAR. Our results also showed that the delivery routes differently affected the bioavailability of administered [(14)C]d-met as well as the concentrations of methionine, ALCAR and the ratio of oxidized to reduced glutathione. Overall, pulmonary delivery via IT administration achieved high concentrations of methionine, ALCAR, and oxidative-related metabolites in cochlear fluids, in some cases surpassing IV administration, while IN route appeared to be the least efficacious. To our knowledge, this is the first report of the direct measurements of antioxidant levels in cochlear fluids after their systemic administration. This report also demonstrates the validity of the pulmonary administration of antioxidants and highlights the different contributions of d-met and ALCAR allowing to further investigate their impact on oxidative stress in the cochlear microenvironment.
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Affiliation(s)
- Yohann Grondin
- Molecular and Integrative Physiologic Sciences Program, Department of Environmental Health, Harvard School of Public Health, 665 Huntington Ave, Boston, MA 02115, USA
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13
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Bratlie KM, York RL, Invernale MA, Langer R, Anderson DG. Materials for diabetes therapeutics. Adv Healthc Mater 2012; 1:267-84. [PMID: 23184741 PMCID: PMC3899887 DOI: 10.1002/adhm.201200037] [Citation(s) in RCA: 115] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2012] [Indexed: 11/10/2022]
Abstract
This review is focused on the materials and methods used to fabricate closed-loop systems for type 1 diabetes therapy. Herein, we give a brief overview of current methods used for patient care and discuss two types of possible treatments and the materials used for these therapies-(i) artificial pancreases, comprised of insulin producing cells embedded in a polymeric biomaterial, and (ii) totally synthetic pancreases formulated by integrating continuous glucose monitors with controlled insulin release through degradable polymers and glucose-responsive polymer systems. Both the artificial and the completely synthetic pancreas have two major design requirements: the device must be both biocompatible and be permeable to small molecules and proteins, such as insulin. Several polymers and fabrication methods of artificial pancreases are discussed: microencapsulation, conformal coatings, and planar sheets. We also review the two components of a completely synthetic pancreas. Several types of glucose sensing systems (including materials used for electrochemical, optical, and chemical sensing platforms) are discussed, in addition to various polymer-based release systems (including ethylene-vinyl acetate, polyanhydrides, and phenylboronic acid containing hydrogels).
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Affiliation(s)
- Kaitlin M. Bratlie
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 32 Vassar St., Cambridge, MA 02142, USA
- Department of Anesthesiology, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
| | - Roger L. York
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 32 Vassar St., Cambridge, MA 02142, USA
- Department of Anesthesiology, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Michael A. Invernale
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 32 Vassar St., Cambridge, MA 02142, USA
- Department of Anesthesiology, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA
| | - Robert Langer
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 32 Vassar St., Cambridge, MA 02142, USA
- Department of Anesthesiology, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Science Technology, Massachusetts Institute of Technology, 45 Carleton Street, Building E25-342, Cambridge, MA 02142, USA
| | - Daniel G. Anderson
- The Koch Institute for Integrative Cancer Research, Massachusetts Institute of Technology, 32 Vassar St., Cambridge, MA 02142, USA
- Department of Anesthesiology, Children’s Hospital Boston, 300 Longwood Avenue, Boston, MA 02115, USA
- Department of Chemical Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA 02139, USA
- Harvard-MIT Division of Health Science Technology, Massachusetts Institute of Technology, 45 Carleton Street, Building E25-342, Cambridge, MA 02142, USA
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Yamamoto Y, Enkhbaatar P, Sousse LE, Sakurai H, Rehberg SW, Asmussen S, Kraft ER, Wright CL, Bartha E, Cox RA, Hawkins HK, Traber LD, Traber MG, Szabo C, Herndon DN, Traber DL. Nebulization with γ-tocopherol ameliorates acute lung injury after burn and smoke inhalation in the ovine model. Shock 2012; 37:408-14. [PMID: 22266978 PMCID: PMC3306540 DOI: 10.1097/shk.0b013e3182459482] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
We hypothesize that the nebulization of γ-tocopherol (g-T) in the airway of our ovine model of acute respiratory distress syndrome will effectively improve pulmonary function following burn and smoke inhalation after 96 h. Adult ewes (n = 14) were subjected to 40% total body surface area burn and were insufflated with 48 breaths of cotton smoke under deep anesthesia, in a double-blind comparative study. A customized aerosolization device continuously delivered g-T in ethanol with each breath from 3 to 48 h after the injury (g-T group, n = 6), whereas the control group (n = 5) was nebulized with only ethanol. Animals were weaned from the ventilator when possible. All animals were killed after 96 h, with the exception of one untreated animal that was killed after 64 h. Lung g-T concentration significantly increased after g-T nebulization compared with the control group (38.5 ± 16.8 vs. 0.39 ± 0.46 nmol/g, P < 0.01). The PaO(2)/FIO(2) ratio was significantly higher after treatment with g-T compared with the control group (310 ± 152 vs. 150 ± 27.0, P < 0.05). The following clinical parameters were improved with g-T treatment: pulmonary shunt fraction, peak and pause pressures, lung bloodless wet-to-dry weight ratios (2.9 ± 0.87 vs. 4.6 ± 1.4, P < 0.05), and bronchiolar obstruction (2.0% ± 1.1% vs. 4.6% ± 1.7%, P < 0.05). Nebulization of g-T, carried by ethanol, improved pulmonary oxygenation and markedly reduced the time necessary for assisted ventilation in burn- and smoke-injured sheep. Delivery of g-T into the lungs may be a safe, novel, and efficient approach for management of acute lung injury patients who have sustained oxidative damage to the airway.
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Affiliation(s)
- Yusuke Yamamoto
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
- Department of Plastic and Reconstructive Surgery, Tokyo Women’s Medical University, 8-1 Kawata-cho, Shinjuku-ku, Tokyo 162-8666, Japan
| | - Perenlei Enkhbaatar
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Linda E. Sousse
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Hiroyuki Sakurai
- Department of Plastic and Reconstructive Surgery, Tokyo Women’s Medical University, 8-1 Kawata-cho, Shinjuku-ku, Tokyo 162-8666, Japan
| | - Sebastian W. Rehberg
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Sven Asmussen
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Edward R. Kraft
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Charlotte L. Wright
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon 97331-6512, USA
| | - Eva Bartha
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Robert A. Cox
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Hal K. Hawkins
- Department of Pathology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Lillian D. Traber
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - Maret G. Traber
- Linus Pauling Institute, Oregon State University, Corvallis, Oregon 97331-6512, USA
| | - Csaba Szabo
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
| | - David N. Herndon
- Shriners Hospitals for Children, Burn Unit, Galveston, Texas 77555-0833
| | - Daniel L. Traber
- Department of Anesthesiology, University of Texas Medical Branch, Galveston, Texas 77555-0833, USA
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15
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Wen J, Xu D, Gu T, Raad I. A green triple biocide cocktail consisting of a biocide, EDDS and methanol for the mitigation of planktonic and sessile sulfate-reducing bacteria. World J Microbiol Biotechnol 2011; 28:431-5. [PMID: 22806837 DOI: 10.1007/s11274-011-0832-1] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2011] [Accepted: 06/30/2011] [Indexed: 11/27/2022]
Abstract
Sulfate-reducing bacteria (SRB) cause souring and their biofilms are often the culprit in Microbiologically Influenced Corrosion (MIC). The two most common green biocides for SRB treatment are tetrakis-hydroxymethylphosphonium sulfate (THPS) and glutaraldehyde. It is unlikely that there will be another equally effective green biocide in the market any time soon. This means more effective biocide treatment probably will rely on biocide cocktails. In this work a triple biocide cocktail consisting of glutaraldehyde or THPS, ethylenediaminedisuccinate (EDDS) and methanol was used to treat planktonic SRB and to remove established SRB biofilms. Desulfovibrio vulgaris (ATCC 7757), a corrosive SRB was used as an example in the tests. Laboratory results indicated that with the addition of 10-15% (v/v) methanol to the glutaraldehyde and EDDS double combination, mitigation of planktonic SRB growth in ATCC 1249 medium and a diluted medium turned from inhibition to a kill effect while the chelator dosage was cut from 2,000 to 1,000 ppm. Biofilm removal was achieved when 50 ppm glutaraldehyde combined with 15% methanol and 1,000 ppm EDDS was used. THPS showed similar effects when it was used to replace glutaraldehyde in the triple biocide cocktail to treat planktonic SRB.
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Affiliation(s)
- J Wen
- Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, USA
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16
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Jaimes-Lizcano YA, Lawson LB, Papadopoulos KD. Oil-Frozen W1/O/W2 Double Emulsions for Dermal Biomacromolecular Delivery Containing Ethanol as Chemical Penetration Enhancer. J Pharm Sci 2011; 100:1398-406. [DOI: 10.1002/jps.22362] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2010] [Revised: 08/27/2010] [Accepted: 09/06/2010] [Indexed: 01/15/2023]
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Hamishehkar H, Emami J, Najafabadi AR, Gilani K, Minaiyan M, Hassanzadeh K, Mahdavi H, Koohsoltani M, Nokhodchi A. Pharmacokinetics and pharmacodynamics of controlled release insulin loaded PLGA microcapsules using dry powder inhaler in diabetic rats. Biopharm Drug Dispos 2010; 31:189-201. [PMID: 20238376 DOI: 10.1002/bdd.702] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
The pulmonary route is an alternative route of administration for the systemic delivery of peptide and proteins with short-half lives. A long-acting formulation of insulin was prepared by encapsulation of protein into respirable, biodegradable microcapsules prepared by an oil in oil emulsification/solvent evaporation method. Insulin-loaded PLGA microcapsules prepared as a dry powder inhaler formulation were administered via the pulmonary route to diabetic rats and serum insulin and glucose concentrations were monitored. Control treatments consisted of respirable spray-dried insulin (RSDI) powder administered by intratracheal insufflation, insulin-loaded PLGA microcapsules and NPH (long-acting) insulin administered by subcutaneous (SC) administration. Pharmacokinetic analysis demonstrated that insulin administered in PLGA microcapsules illustrated a sustained release profile which resulted in a longer mean residence time, 4 and 5 fold longer than those after pulmonary administration of RSDI and SC injection of NPH insulin, respectively. Accordingly, the hypoglycemic profile followed a stable and sustained pattern which remained constant between 10 and 48 h. Results of the in vitro experiments were in good agreement with those of in vivo studies. Bronchoalveolar lavage fluid analysis indicated that microcapsules administration did not increase the activities of lactate dehydrogenase and total protein. However, histological examination of the lung tissue indicated a minor but detectable effect on the normal physiology of the rat lung. These findings suggest that the encapsulation of peptides and proteins into PLGA microcapsules technique could be a promising controlled delivery system for pulmonary administration.
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Affiliation(s)
- Hamed Hamishehkar
- Pharmaceutical Technology Laboratory, Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran
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18
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Montharu J, Le Guellec S, Kittel B, Rabemampianina Y, Guillemain J, Gauthier F, Diot P, de Monte M. Evaluation of Lung Tolerance of Ethanol, Propylene Glycol, and Sorbitan Monooleate as Solvents in Medical Aerosols. J Aerosol Med Pulm Drug Deliv 2010; 23:41-6. [DOI: 10.1089/jamp.2008.0740] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- Jérôme Montharu
- INSERM U618, IFR135, Faculté de Médecine, CHRU Bretonneau, Tours, France
| | | | - Birgit Kittel
- Pfizer Global Research and Development, Amboise, France
| | | | | | - Francis Gauthier
- INSERM U618, IFR135, Faculté de Médecine, CHRU Bretonneau, Tours, France
| | - Patrice Diot
- INSERM U618, IFR135, Faculté de Médecine, CHRU Bretonneau, Tours, France
| | - Michèle de Monte
- INSERM U618, IFR135, Faculté de Médecine, CHRU Bretonneau, Tours, France
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19
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Fernandes CA, Vanbever R. Preclinical models for pulmonary drug delivery. Expert Opin Drug Deliv 2009; 6:1231-45. [DOI: 10.1517/17425240903241788] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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20
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Iskandar F, Nandiyanto ABD, Widiyastuti W, Young LS, Okuyama K, Gradon L. Production of morphology-controllable porous hyaluronic acid particles using a spray-drying method. Acta Biomater 2009; 5:1027-34. [PMID: 19114316 DOI: 10.1016/j.actbio.2008.11.016] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2008] [Revised: 11/17/2008] [Accepted: 11/20/2008] [Indexed: 10/21/2022]
Abstract
Hyaluronic acid (HA) porous particles with controllable porosity and pore size, ranging from 100 to 300 nm, were successfully prepared using a colloidal templating and spray-drying method. HA powder and polystyrene latex (PSL) particles, which were used as the precursor and templating agent, respectively, were mixed in aqueous solution and spray-dried using a two-fluid nozzle system to produce HA and PSL composite particles. Water was evaporated during spray-drying using heated air with a temperature of 120 degrees C. This simple process was completed within several seconds. The prepared particles were collected and washed with an organic solvent to dissolve the PSL templating agent. The porosity and pore size of the resulting particles were easily controlled by changing the initial mass ratio of precursor to templating agent, i.e., HA to PSL, and by altering the size of the PSL template particles.
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21
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Liu J, Gong T, Fu H, Wang C, Wang X, Chen Q, Zhang Q, He Q, Zhang Z. Solid lipid nanoparticles for pulmonary delivery of insulin. Int J Pharm 2008; 356:333-44. [PMID: 18281169 DOI: 10.1016/j.ijpharm.2008.01.008] [Citation(s) in RCA: 134] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2007] [Revised: 12/06/2007] [Accepted: 01/07/2008] [Indexed: 10/22/2022]
Abstract
Growing attention has been given to the potential of pulmonary route as an alternative for non-invasive systemic delivery of therapeutic agents. In this study, novel nebulizer-compatible solid lipid nanoparticles (SLNs) for pulmonary drug delivery of insulin were developed by reverse micelle-double emulsion method. The influences of the amount of sodium cholate (SC) and soybean phosphatidylcholine (SPC) on the deposition properties of the nanoparticles were investigated. Under optimal conditions, the entrapment delivery (ED), respirable fraction (RF) and nebulization efficiency (NE) of SLNs could reach 96.53, 82.11 and 63.28%, respectively, and Ins-SLNs remained stable during nebulization. Fasting plasma glucose level was reduced to 39.41% and insulin level was increased to approximately 170 microIU/ml 4h after pulmonary administration of 20 IU/kg Ins-SLNs. A pharmacological bioavailability of 24.33% and a relative bioavailability of 22.33% were obtained using subcutaneous injection as a reference. Incorporating fluorescent-labelled insulin into SLNs, we found that the SLNs were effectively and homogeneously distributed in the lung alveoli. These findings suggested that SLNs could be used as a potential carrier for pulmonary delivery of insulin by improving both in vitro and in vivo stability as well as prolonging hypoglycemic effect, which inevitably resulted in enhanced bioavailability.
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Affiliation(s)
- Jie Liu
- Key Laboratory of Drug Targeting, Ministry of Education, Sichuan University, No. 17, Section 3, Southern Renmin Road, Chengdu 610041, PR China
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22
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Effect of solvation on the structure conformation of human serum albumin in aqueous–alcohol mixed solvents. Chem Phys 2007. [DOI: 10.1016/j.chemphys.2007.07.027] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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23
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Evgenov OV, Kohane DS, Bloch KD, Stasch JP, Volpato GP, Bellas E, Evgenov NV, Buys ES, Gnoth MJ, Graveline AR, Liu R, Hess DR, Langer R, Zapol WM. Inhaled agonists of soluble guanylate cyclase induce selective pulmonary vasodilation. Am J Respir Crit Care Med 2007; 176:1138-45. [PMID: 17872487 PMCID: PMC2176100 DOI: 10.1164/rccm.200707-1121oc] [Citation(s) in RCA: 58] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
RATIONALE Nitric oxide-independent agonists of soluble guanylate cyclase (sGC) have been developed. OBJECTIVES We tested whether inhalation of novel dry-powder microparticle formulations containing sGC stimulators (BAY 41-2272, BAY 41-8543) or an sGC activator (BAY 58-2667) would produce selective pulmonary vasodilation in lambs with acute pulmonary hypertension. We also evaluated the combined administration of BAY 41-8543 microparticles and inhaled nitric oxide (iNO). Finally, we examined whether inhaling BAY 58-2667 microparticles would produce pulmonary vasodilation when the response to iNO is impaired. METHODS In awake, spontaneously breathing lambs instrumented with vascular catheters and a tracheostomy tube, U-46619 was infused intravenously to increase mean pulmonary arterial pressure to 35 mm Hg. MEASUREMENTS AND MAIN RESULTS Inhalation of microparticles composed of either BAY 41-2272, BAY 41-8543, or BAY 58-2667 and excipients (dipalmitoylphosphatidylcholine, albumin, lactose) produced dose-dependent pulmonary vasodilation and increased transpulmonary cGMP release without significant effect on mean arterial pressure. Inhalation of microparticles containing BAY 41-8543 or BAY 58-2667 increased systemic arterial oxygenation. The magnitude and duration of pulmonary vasodilation induced by iNO were augmented after inhaling BAY 41-8543 microparticles. Intravenous administration of 1H-[1,2,4]oxadiazolo[4,3-a]quinoxalin-1-one (ODQ), which oxidizes the prosthetic heme group of sGC, markedly reduced the pulmonary vasodilator effect of iNO. In contrast, pulmonary vasodilation and transpulmonary cGMP release induced by inhaling BAY 58-2667 microparticles were greatly enhanced after treatment with ODQ. CONCLUSIONS Inhalation of microparticles containing agonists of sGC may provide an effective novel treatment for patients with pulmonary hypertension, particularly when responsiveness to iNO is impaired by oxidation of sGC.
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Affiliation(s)
- Oleg V Evgenov
- Department of Anesthesia and Critical Care, Massachusetts General Hospital, 55 Fruit Street, Gray/Bigelow 444, Boston, MA 02114, USA.
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24
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Mitragotri S. Current status and future prospects of needle-free liquid jet injectors. Nat Rev Drug Discov 2006; 5:543-8. [PMID: 16816837 DOI: 10.1038/nrd2076] [Citation(s) in RCA: 200] [Impact Index Per Article: 11.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Needle-free liquid jet injectors have been used for more than 50 years for parenteral delivery of vaccines and drugs. Although excellent bioavailability has been reported for a number of drugs, occasional pain and bruising have limited wide acceptance of jet injectors. This article reviews jet injectors with respect to their current clinical applications, emerging applications, mechanistic understanding and future prospects.
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Affiliation(s)
- Samir Mitragotri
- Department of Chemical Engineering, University of California, Santa Barbara, California 93106, USA.
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Kim HK, Chung HJ, Park TG. Biodegradable polymeric microspheres with “open/closed” pores for sustained release of human growth hormone. J Control Release 2006; 112:167-74. [PMID: 16542746 DOI: 10.1016/j.jconrel.2006.02.004] [Citation(s) in RCA: 183] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Revised: 01/03/2006] [Accepted: 02/06/2006] [Indexed: 11/29/2022]
Abstract
A new approach for attaining sustained release of protein is introduced, involving a pore-closing process of preformed porous PLGA microspheres. Highly porous biodegradable poly(D,L-lactic-co-glycolic acid) (PLGA) microspheres were fabricated by a single water-in-oil emulsion solvent evaporation technique using Pluronic F127 as an extractable porogen. Recombinant human growth hormone (rhGH) was incorporated into porous microspheres by a simple solution dipping method. For their controlled release, porous microspheres containing hGH were treated with water-miscible solvents in aqueous phase for production of pore-closed microspheres. These microspheres showed sustained release patterns over an extended period; however, the drug loading efficiency was extremely low. To overcome the drug loading problem, the pore-closing process was performed in an ethanol vapor phase using a fluidized bed reactor. The resultant pore-closed microspheres exhibited high protein loading amount as well as sustained rhGH release profiles. Also, the released rhGH exhibited structural integrity after the treatment.
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Affiliation(s)
- Hong Kee Kim
- Department of Biological Sciences, Korea Advanced Institute of Science and Technology, Daejeon, 305-701, Republic of Korea
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27
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Fineberg SE, Kawabata T, Finco-Kent D, Liu C, Krasner A. Antibody response to inhaled insulin in patients with type 1 or type 2 diabetes. An analysis of initial phase II and III inhaled insulin (Exubera) trials and a two-year extension trial. J Clin Endocrinol Metab 2005; 90:3287-94. [PMID: 15741258 DOI: 10.1210/jc.2004-2229] [Citation(s) in RCA: 111] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/09/2023]
Abstract
OBJECTIVE To compare antibody responses to inhaled human insulin vs. sc human insulin and to determine whether insulin antibody binding is associated with adverse clinical consequences. RESEARCH DESIGN AND METHODS Insulin antibody data from initial phase II/III trials were analyzed comparing the efficacy and safety of inhaled insulin with various agents, including sc insulin. Additionally, data from a 24-month extension of the phase III studies were examined. Data were pooled into the following three groups based on insulin treatment status at baseline: patients with type 1 diabetes, and patients with type 2 diabetes using insulin and not using insulin at baseline. Ig class analysis was also performed on randomly selected sera from type 1 patients at the end of the initial trials. RESULTS In the initial trials, greater insulin antibody binding was observed in patients receiving inhaled insulin vs. sc insulin. The greatest antibody responses to inhaled insulin were observed in patients with type 1 diabetes [nonparametric comparison of medians at the end of the study, 22.0% binding (unadjusted 95% confidence interval: 19.5, 24.5)], and the lowest responses were observed in non-insulin-using patients with type 2 diabetes in which there was no difference in median values at the end of the study. There were no correlations between antibody binding and glycemic control (measured using glycosylated hemoglobin), insulin dose requirements, hypoglycemic events, or pulmonary function (measured by changes in forced expiratory volume in 1 sec and diffusion capacity of carbon monoxide). Antibody responses were IgG in type. Differences in antibody levels observed in patients with type 1 vs. type 2 diabetes were maintained over the 24-month extension trials. Peak antibody levels across all groups were generally observed after 6-12 months of insulin therapy. Inhaled insulin therapy was not associated with a greater incidence of allergy or other hypersensitivity reactions. CONCLUSION Inhaled insulin was observed to produce a larger antibody response than sc insulin. Insulin antibody binding has not been associated with adverse clinical consequences in trials to date.
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Affiliation(s)
- S Edwin Fineberg
- Indiana University School of Medicine, Indianapolis, Indiana 46202, USA.
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28
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Whitaker MJ, Hao J, Davies OR, Serhatkulu G, Stolnik-Trenkic S, Howdle SM, Shakesheff KM. The production of protein-loaded microparticles by supercritical fluid enhanced mixing and spraying. J Control Release 2005; 101:85-92. [PMID: 15588896 DOI: 10.1016/j.jconrel.2004.07.017] [Citation(s) in RCA: 84] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2004] [Accepted: 07/12/2004] [Indexed: 11/26/2022]
Abstract
In this study, we use supercritical carbon dioxide as a processing medium for the fabrication of poly(DL-lactic acid) P(DLLA) microparticles that encapsulate a protein material. We have previously demonstrated that this polymer and a dry powder of a protein can be mixed under supercritical carbon dioxide conditions (above 31.1 degrees C and 73.8 bar) and that the protein component retains its biological activity. In this paper, we progress the work to demonstrate that the plasticized polymer and dry powder protein mixture can be sprayed to form solid polymer particles that encapsulate the protein. Particle size range is between 10 and 300 microm after spraying. Ribonuclease A and lysozyme were encapsulated in the polymer without significant loss of enzymatic activity. Biological assays of insulin and calcitonin confirm retention of activity after fabrication of the microparticles and release of the peptides/proteins.
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Dellamary L, Smith DJ, Bloom A, Bot S, Guo GR, Deshmuk H, Costello M, Bot A. Rational design of solid aerosols for immunoglobulin delivery by modulation of aerodynamic and release characteristics. J Control Release 2005; 95:489-500. [PMID: 15023460 DOI: 10.1016/j.jconrel.2003.12.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2003] [Accepted: 12/19/2003] [Indexed: 11/26/2022]
Abstract
Parenteral administration of immunoglobulins (Ig) for prevention or treatment of respiratory diseases achieves only modest concentrations of antibody in the pulmonary interstitial tissue and airways. Aerosols, including spray-dried particles, must overcome two limiting factors in order to be effective vehicles for pulmonary delivery of Ig: (i) Fc receptor (FcR)-mediated scavenging by macrophages and (ii) clearance by the mucociliary system. Ig-incorporated spray-dried lipid microparticles (SDLM), coformulated with or without a biocompatible surfactant (1% w:w) to modulate protein release, were designed and tested for their capability to deliver Ig to the respiratory tract. To determine efficacy, rodents were immunized with SDLM containing antiinfluenza antibody followed by virus challenge and clinical parameters measured. Control of the release kinetics resulted in enhanced delivery of immunoglobulins to the respiratory tract and interstitial tissue with slow translocation into the systemic circulation. As much as 60% of the IgG delivered from nonretentive SDLM could be recovered from the lung interstitial tissue within 1 h after aerosol administration at a dose of 1 mg of Ig/kg of body weight. In addition, nonretentive rather than slow-release particles loaded with antiinfluenza antibody were effective in curbing virus replication with a resulting positive clinical outcome. Thus, controlled release of Ig by manipulating aerosol characteristics and composition allows for a significant increase in the efficiency of pulmonary delivery of antibodies.
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Affiliation(s)
- Luis Dellamary
- Department of Immunology, Alliance Pharmaceutical Corp. San Diego, CA 92121, USA
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30
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Angelova A, Angelov B, Papahadjopoulos-Sternberg B, Ollivon M, Bourgaux C. Structural organization of proteocubosome carriers involving medium- and large-size proteins. J Drug Deliv Sci Technol 2005. [DOI: 10.1016/s1773-2247(05)50013-3] [Citation(s) in RCA: 34] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Daugherty AL, Mrsny RJ. Emerging technologies that overcome biological barriers for therapeutic protein delivery. Expert Opin Biol Ther 2004; 3:1071-81. [PMID: 14519072 DOI: 10.1517/14712598.3.7.1071] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Abstract
In the past decade, genomic research and the nascent field of proteomics have exponentially increased the number of potential protein therapeutic molecules for treating medical needs that were previously unmet. To realise the full clinical potential of many of the novel protein drug entities arising from these intense research efforts, emerging protein delivery technologies may be required. Advanced delivery technologies may offer the ability to overcome biochemical and anatomical barriers to protein drug transport, without incurring adverse events, to deliver the agent(s) at a certain desired rate and duration, to protect therapeutic macromolecules from in situ or systemic degradation, as well as increase their therapeutic index by targeting the drug action to a specific site. This review will cover a myriad of novel and emerging technologies that are directed at bypassing biological barriers and that have shown promise in advancing the therapeutic potential of protein drugs.
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Affiliation(s)
- Ann L Daugherty
- Department of Pharmaceutical Research and Development, Genentech, Inc., South San Francisco, CA 94080, USA
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32
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Chung HH, Harms G, Seong CM, Choi BH, Min C, Taulane JP, Goodman M. Dendritic oligoguanidines as intracellular translocators. Biopolymers 2004; 76:83-96. [PMID: 14997478 DOI: 10.1002/bip.10597] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
A series of polyguanidylated dendritic structures that can be used as molecular translocators have been designed and synthesized based on nonpeptide units. The dendritic oligoguanidines conjugated with fluorescein or with a green fluorescent protein (GFP) mutant as cargos were isolated and characterized. Quantification and time-course analyses of the cellular uptake of the conjugates using HeLa S3 and human cervical carcinoma cells reveal that the polyguanidylated dendrimers have comparable translocation efficiency to the Tat(49-57) peptide. Furthermore, the deconvolution microscopy image analysis shows that they are located inside the cells. These results clearly show that nonlinear, branched dendritic oligoguanidines are capable of translocation through the cell membrane. This work also demonstrates the potential of these nonpeptidic dendritic oligoguanidines as carriers for intracellular delivery of small molecule drugs, bioactive peptides, and proteins.
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Affiliation(s)
- Hyun-Ho Chung
- LG Biomedical Institute, 3252 Holliday Court, Suite 101, La Jolla, CA 92037, USA
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33
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Wang F, Daugherty B, Keise LL, Wei Z, Foley JP, Savani RC, Koval M. Heterogeneity of claudin expression by alveolar epithelial cells. Am J Respir Cell Mol Biol 2003; 29:62-70. [PMID: 12600828 DOI: 10.1165/rcmb.2002-0180oc] [Citation(s) in RCA: 128] [Impact Index Per Article: 6.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Claudins are proteins that participate in epithelial barrier function and regulate paracellular permeability. By immunohistochemistry of adult rat lung sections, claudin-3, claudin-4, and claudin-5 were found to be co-expressed by type II alveolar epithelial cells. Claudin-3 and claudin-4 were also co-expressed by some alveolar epithelial cells adjacent to type II cells. In contrast, claudin-5 was expressed throughout the alveolus. Isolated primary rat alveolar epithelial cells in culture also expressed claudin-3, claudin-4, and claudin-5, but showed little claudin-1 and claudin-2 expression. Claudin expression by isolated cells at both the mRNA and protein level varied with time in culture. In particular, claudin-3 and claudin-5 co-localized and were distributed around the alveolar cell periphery, but claudin-4 expression was heterogeneous. We also found that paracellular permeability was increased when cultured alveolar epithelial cells were treated with a fatty acid amide, methanandamide. Methanandamide did not alter cell viability. Claudin-3, claudin-4, claudin-5, occludin, and zona occludens 1 remained localized to cell-cell contact sites at the plasma membrane in methanandamide-treated cells, suggesting that plasma membrane localization of these junction proteins is not sufficient for maintaining barrier function. However, methanandamide-treated cells showed a 12-fold increase in claudin-5 expression and a 2- to 3-fold increase in claudin-3, consistent with the notion that specific changes in claudin expression levels may correlate with changes in alveolar epithelial barrier function.
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Affiliation(s)
- Fushan Wang
- Department of Physiology, University of Pennsylvania School of Medicine, Philadelphia, PA 19104-6085, USA
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Fu J, Fiegel J, Krauland E, Hanes J. New polymeric carriers for controlled drug delivery following inhalation or injection. Biomaterials 2002; 23:4425-33. [PMID: 12219833 DOI: 10.1016/s0142-9612(02)00182-5] [Citation(s) in RCA: 128] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Inhalation is gaining increasing acceptance as a convenient, reproducible, and non-invasive method of drug delivery to the lung tissue and/or the systemic circulation. However, sustained drug release following inhalation remains elusive, due in part to the lack of appropriate materials designed specifically for use in the lungs to control the release of bioactive compounds. To address this problem, we have synthesized a new family of ether-anhydride copolymers composed entirely of FDA-approved monomers, including polyethylene glycol (PEG). Sebacic acid, a hydrophobic monomer, was copolymerized with PEG in order to produce water-insoluble polymers capable of providing continuous drug release kinetics following immersion in an aqueous environment. Various amounts of PEG (5-50% by mass) were incorporated into the backbone of the new polymers to allow tuning of particle surface properties for potentially enhanced aerosolization efficiency and to decrease particle clearance rates by phagocytosis in the deep lung. The preparation of large porous particles with these new polymers was systematically approached, utilizing central composite design, to develop improved particle physical properties for deep lung delivery. Microparticles containing model drugs were made with sizes suitable for deposition in various regions of the lung following inhalation as a dry powder. Due to such properties as surface erosion (leading to continuous drug release profiles), erosion times ranging from hours to days (allowing control over drug delivery duration), and ability to incorporate up to 50% PEG in their backbone, these new systems may also find application as "stealth" carriers for therapeutic compounds following intravenous injection.
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Affiliation(s)
- Jie Fu
- Department of Chemical Engineering. The Johns Hopkins University, Baltimore, MD 21218, USA
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