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https://www.readbyqxmd.com/read/29125912/an-in-vitro-examination-of-the-effects-of-altitude-on-dry-powder-inhaler-performance
#1
Conor A Ruzycki, Andrew R Martin, Reinhard Vehring, Warren H Finlay
BACKGROUND: The effects of altitude on dry powder inhaler (DPI) performance remain understudied. As existing standardized testing methodologies do not consider altitude, inhalation devices may be used in environments in which their performance has not been sufficiently characterized. METHODS: Six DPIs spanning a range of device resistances were examined in vitro in an environmental chamber mimicking a high-altitude environment equivalent to an altitude of 4200 m, with controls established at an altitude of 700 m...
November 10, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/29122735/intranasal-immunization-with-dry-powder-vaccines
#2
Tania F Bahamondez-Canas, Zhengrong Cui
Vaccination represents a cost-effective weapon for disease prevention and has proven to dramatically reduce the incidences of several diseases that once were responsible for significant mortality and morbidity worldwide. The nasal cavity constitutes the initial stage of the respiratory system and the first contact with inhaled pathogens. The intranasal (IN) route for vaccine administration is an attractive alternative to injection, due to the ease of administration as well as better patient compliance. Many published studies have demonstrated the safety and effectiveness of IN immunization with liquid vaccines...
November 6, 2017: European Journal of Pharmaceutics and Biopharmaceutics
https://www.readbyqxmd.com/read/29119403/evaluation-of-the-efficiency-of-single-inhaler-combination-therapy-with-budesonide-formoterol-fumarate-in-patients-with-bronchial-asthma-in-daily-clinical-practice
#3
Michał Pirożyński, Piotr Hantulik, Agnieszka Almgren-Rachtan, Jerzy Chudek
INTRODUCTION: The effectiveness of single-inhaler budesonide/formoterol fumarate combination therapy for asthma has been previously shown for the original product. The aim of this nonrandomized, open-label, postauthorization efficacy study (PAES) real-life clinical assessment was to evaluate the clinical effectiveness of a second product (Bufomix Easyhaler(®)) in the daily clinical practice of asthma therapy. METHODS: This multicenter PAES was conducted by 220 unselected allergologists and pulmonologists who enrolled 2200 adult outpatients (age 49...
November 8, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/29104067/the-application-of-quality-by-design-framework-in-the-pharmaceutical-development-of-dry-powder-inhalers
#4
Francesca Buttini, Stavroula Rozou, Alessandra Rossi, Vera Zoumpliou, Dimitrios M Rekkas
This review aims in discussing the application of the Quality by Design (QbD) approach on the development of the Dry Powders Inhalers (DPIs). It starts with a thorough presentation of the Quality's concept evolution within the pharmaceutical sector and how this slowly adopted set of quality guidelines is now a major scientific and regulatory requirement. DPIs represent a type of delivery system where the system's thinking approach integrating the device, the formulation and the patient represent a major challenge to be met...
November 2, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29100914/powder-flow-analysis-a-simple-method-to-indicate-the-ideal-amount-of-lactose-fines-in-dry-powder-inhaler-formulations
#5
Mats Hertel, Eugen Schwarz, Mirjam Kobler, Sabine Hauptstein, Hartwig Steckel, Regina Scherließ
Many efforts have been made in the past to understand the function of lactose fines which are given as a ternary component to carrier-based dry powder inhaler formulations. It is undisputed that fines can significantly improve the performance of such formulations, but choosing the right amount of fines is a crucial point, because too high concentrations can have negative effects on the dispersion performance. The aim of this study was to indicate the optimal concentration of fines with a simple test method...
October 31, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29094315/comparative-efficacy-of-once-daily-umeclidinium-vilanterol-and-tiotropium-olodaterol-therapy-in-symptomatic-chronic-obstructive-pulmonary-disease-a-randomized-study
#6
Gregory J Feldman, Ana R Sousa, David A Lipson, Lee Tombs, Neil Barnes, John H Riley, Sadhana Patel, Ian Naya, Chris Compton, Bernardino Alcázar Navarrete
INTRODUCTION: We report the results of the first direct comparison of the once-daily fixed-dose long-acting muscarinic antagonist/long-acting β2-agonist (LAMA/LABA) combinations umeclidinium/vilanterol (UMEC/VI) and tiotropium/olodaterol (TIO/OLO) in patients with COPD. METHODS: This was a randomized, two-period crossover open-label study in symptomatic patients with COPD [age 40 years or older, postbronchodilator forced expiratory volume in 1 s (FEV1) of 70% or less and 50% or more of predicted normal values, and modified Medical Research Council Dyspnoea Scale score of 2 or greater] not receiving inhaled corticosteroid therapy...
November 1, 2017: Advances in Therapy
https://www.readbyqxmd.com/read/29093369/-development-of-inhalable-dry-powder-formulations-loaded-with-nanoparticles-maintaining-their-original-physical-properties-and-functions
#7
Tomoyuki Okuda
 Functional nanoparticles, such as liposomes and polymeric micelles, are attractive drug delivery systems for solubilization, stabilization, sustained release, prolonged tissue retention, and tissue targeting of various encapsulated drugs. For their clinical application in therapy for pulmonary diseases, the development of dry powder inhalation (DPI) formulations is considered practical due to such advantages as: (1) it is noninvasive and can be directly delivered into the lungs; (2) there are few biocomponents in the lungs that interact with nanoparticles; and (3) it shows high storage stability in the solid state against aggregation or precipitation of nanoparticles in water...
2017: Yakugaku Zasshi: Journal of the Pharmaceutical Society of Japan
https://www.readbyqxmd.com/read/29077527/the-rationale-and-evidence-for-use-of-inhaled-antibiotics-to-control-pseudomonas-aeruginosa-infection-in-non-cystic-fibrosis-bronchiectasis
#8
Rajiv Dhand
Non-cystic fibrosis bronchiectasis (NCFBE) is a chronic inflammatory lung disease characterized by irreversible dilation of the bronchi, symptoms of persistent cough and expectoration, and recurrent infective exacerbations. The prevalence of NCFBE is on the increase in the United States and Europe, but no licensed therapies are currently available for its treatment. Although there are many similarities between NCFBE and cystic fibrosis (CF) in terms of respiratory symptoms, airway microbiology, and disease progression, there are key differences, for example, in response to treatment, suggesting differences in pathogenesis...
October 27, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/29068693/in-vivo-pulmonary-delivery-and-magnetic-targeting-of-dry-powder-nano-in-microparticles
#9
Dominique N Price, Loreen R Stromberg, Nitesh K Kunda, Pavan Muttil
This brief communication evaluates the cytotoxicity and targeting capability of a dry powder chemotherapeutic. Nano-in-microparticles (NIMs) are a dry powder drug delivery vehicle containing superparamagnetic iron oxide nanoparticles (SPIONs) and either doxorubicin (w/w solids) or fluorescent nanospheres (w/v during formulation; as a drug surrogate) in a lactose matrix. In vitro cytotoxicity was evaluated in A549 adenocarcinoma cells using MTS and LDH assays to assess viability and toxicity after 48 hours of NIMs exposure...
October 25, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29063377/the-relationship-between-the-permeability-and-the-performance-of-carrier-based-dry-powder-inhalation-mixtures-new-insights-and-practical-guidance
#10
Ahmed O Shalash, Nawal M Khalafallah, Abdulla M Molokhia, Mustafa M A Elsayed
The permeability of a powder bed reflects its particle size distribution, shape, packing, porosity, cohesivity, and tensile strength in a manner relevant to powder fluidization. The relationship between the permeability and the performance of carrier-based dry powder inhalation (DPI) mixtures has, however, aroused controversy. The current study sought to gain new insights into the relationship and to explore its potential applications. We studied eight lactose materials as DPI carriers. The carriers covered a broad permeability range of 0...
October 23, 2017: AAPS PharmSciTech
https://www.readbyqxmd.com/read/29061751/intrapulmonary-pharmacokinetics-of-laninamivir-a-neuraminidase-inhibitor-after-a-single-nebulized-administration-of-laninamivir-octanoate-in-healthy-japanese-subjects
#11
Kaoru Toyama, Hidetoshi Furuie, Hitoshi Ishizuka
A single inhaled dose of laninamivir octanoate (LO) using a dry powder inhaler (DPI) is effective for the treatment and prophylaxis of influenza. Nebulizers are an option for pediatric and elderly patients who may have difficulty in using a DPI. A single-center, open-label study was conducted to evaluate the plasma and intrapulmonary pharmacokinetics (PK) of laninamivir after a single nebulized administration of LO in healthy male Japanese subjects for identifying a safe and effective dosage regimen for a nebulizer...
October 23, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/29057065/targeting-the-small-airways-with-dry-powder-adenosine-a-challenging-concept
#12
Erica van der Wiel, Anne J Lexmond, Maarten van den Berge, Dirkje S Postma, Paul Hagedoorn, Henderik W Frijlink, Martijn P Farenhorst, Anne H de Boer, Nick H T Ten Hacken
Background: Small-particle inhaled corticosteroids (ICS) provide a higher small airway deposition than large-particle ICS. However, we are still not able to identify asthma patients who will profit most from small-particle treatment. Objective: We aimed to identify these patients by selectively challenging the small and large airways. We hypothesized that the airways could be challenged selectively using small- and large-particle adenosine, both inhaled at a high and a low flow rate. Design: In this cross-over study 11 asthma subjects performed four dry powder adenosine tests, with either small (MMAD 2...
2017: European Clinical Respiratory Journal
https://www.readbyqxmd.com/read/29054499/coupled-in-silico-platform-computational-fluid-dynamics-cfd-and-physiologically-based-pharmacokinetic-pbpk-modelling
#13
Aleksandra Vulović, Tijana Šušteršič, Sandra Cvijić, Svetlana Ibrić, Nenad Filipović
One of the critical components of the respiratory drug delivery is the manner in which the inhaled aerosol is deposited in respiratory tract compartments. Depending on formulation properties, device characteristics and breathing pattern, only a certain fraction of the dose will reach the target site in the lungs, while the rest of the drug will deposit in the inhalation device or in the mouth-throat region. The aim of this study was to link the Computational fluid dynamics (CFD) with physiologically-based pharmacokinetic (PBPK) modelling in order to predict aerolisolization of different dry powder formulations, and estimate concomitant in vivo deposition and absorption of amiloride hydrochloride...
October 17, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/29051120/the-influence-of-high-shear-mixing-on-ternary-dry-powder-inhaler-formulations
#14
Mats Hertel, Eugen Schwarz, Mirjam Kobler, Sabine Hauptstein, Hartwig Steckel, Regina Scherließ
The blending process is a key step in the production of dry powder inhaler formulations, but only little is known about the influence of process parameters. This is especially true for high shear blending of ternary formulations. For this reason, this study aims to investigate the influence of high shear mixing process parameters (mixing time and rotation speed) on the fine particle fraction (FPF) of ternary mixtures when using budesonide as model drug, two different carrier materials and two different mixing orders...
October 16, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/29047275/excipient-free-pulmonary-delivery-and-macrophage-targeting-of-clofazimine-via-air-jet-micronization
#15
Ashlee D Brunaugh, Syed Umer Jan, Silvia Ferrati, Hugh D C Smyth
Clofazimine (CFZ) is highly active against mycobacterium, including resistant Mycobacterium tuberculosis, but its therapeutic efficacy via the oral route is limited by severe adverse effects, poor aqueous solubility, and slow onset of action. Pulmonary delivery of CFZ is an attractive alternative to target mycobacterium-harboring alveolar macrophages. This study explores the use of air jet milling to develop a respirable, cost-effective CFZ formulation. Jet milled CFZ was readily dispersed from an off-the-shelf dry powder inhaler without the need for additional excipients or carrier particles...
November 6, 2017: Molecular Pharmaceutics
https://www.readbyqxmd.com/read/29033625/the-salford-lung-study-a-pioneering-comparative-effectiveness-approach-to-copd-and-asthma-in-clinical-trials
#16
REVIEW
Timothy E Albertson, Susan Murin, Mark E Sutter, James A Chenoweth
The Salford Lung Study (SLS) of patients with asthma and chronic obstructive pulmonary disease (COPD) is a practical, community-based, randomized, open-label pragmatic study on the efficacy and safety of the once-daily dry powder inhaler that combines the inhaled corticosteroid fluticasone furoate (FF) with the long-acting beta2 agonist vilanterol (VI). The asthma component of the SLS is not yet reported but the COPD component, done over a 12-month period, found a statistically significant 8.4% reduction in COPD exacerbations when compared to usual care...
2017: Pragmatic and Observational Research
https://www.readbyqxmd.com/read/28965047/physicochemical-stability-and-aerosolization-performance-of-dry-powder-inhalation-system-containing-ciprofloxacin-hydrochloride
#17
Keyhaneh Karimi, Gábor Katona, Ildikó Csóka, Rita Ambrus
Antibiotic delivery in form of dry powder inhalation has been studied for possible clinical treatment of respiratory tract infection in the recent years. Dry powder inhalation of ciprofloxacin hydrochloride (CIP) assures local antibacterial activity and comfort of easy application. The aim of this work was to test the stability of co-spray-dried CIP in carrier free system. Since the microparticles in the dry powder system are amorphous and do not contain any stabilizer, the effects of temperature and relative humidity (RH) on the physicochemical properties and aerosolization behavior are very important...
September 22, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28941830/experimental-and-computational-study-of-the-effect-of-breath-actuated-mechanism-built-in-the-nexthaler-%C3%A2-dry-powder-inhaler
#18
Árpád Farkas, David Lewis, Tanya Church, Alan Tweedie, Francesca Mason, Allen E Haddrell, Jonathan P Reid, Alpár Horváth, Imre Balásházy
The breath-actuated mechanism (BAM) is a mechanical unit included in NEXThaler(®) with the role of delaying the emission of the drug until the inhalation flow rate of the patient is sufficiently high to detach the drug particles from their carriers. The main objective of this work was to analyse the effect of the presence of BAM on the size distribution of the emitted drug and its airway deposition efficiency and distribution. Study of the hygroscopic growth of the emitted drug particles and its effect on the deposition was another goal of this study...
November 25, 2017: International Journal of Pharmaceutics
https://www.readbyqxmd.com/read/28937774/selective-nonsteroidal-glucocorticoid-receptor-modulators-for-the-inhaled-treatment-of-pulmonary-diseases
#19
Martin Hemmerling, Stinabritt Nilsson, Karl Edman, Stefan Eirefelt, Wayne Russell, Ramon Hendrickx, Eskil Johnsson, Carina Kärrman Mårdh, Markus Berger, Hartmut Rehwinkel, Anna Abrahamsson, Jan Dahmén, Anders R Eriksson, Balint Gabos, Krister Henriksson, Nafizal Hossain, Svetlana Ivanova, Anne-Helene Jansson, Tina J Jensen, Anders Jerre, Henrik Johansson, Tomas Klingstedt, Matti Lepistö, Martin Lindsjö, Irene Mile, Grigorios Nikitidis, John Steele, Ulrika Tehler, Lisa Wissler, Thomas Hansson
A class of potent, nonsteroidal, selective indazole ether-based glucocorticoid receptor modulators (SGRMs) was developed for the inhaled treatment of respiratory diseases. Starting from an orally available compound with demonstrated anti-inflammatory activity in rat, a soft-drug strategy was implemented to ensure rapid elimination of drug candidates to minimize systemic GR activation. The first clinical candidate 1b (AZD5423) displayed a potent inhibition of lung edema in a rat model of allergic airway inflammation following dry powder inhalation combined with a moderate systemic GR-effect, assessed as thymic involution...
October 12, 2017: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/28935254/design-of-gefitinib-loaded-poly-l-lactic-acid-microspheres-via-a-supercritical-anti-solvent-process-for-dry-powder-inhalation
#20
Qing Lin, Guijin Liu, Ziyi Zhao, Dongwei Wei, Jiafeng Pang, Yanbin Jiang
To develop a safer, more stable and potent formulation of gefitinib (GFB), micro-spheres of GFB encapsulated into poly (l-lactic acid) (PLLA) have been prepared by supercritical anti-solvent (SAS) technology in this study. Operating factors were optimized using a selected OA16 (4(5)) orthogonal array design, and the properties of the raw material and SAS processed samples were characterized by different methods The results show that the GFB-loaded PLLA particles prepared were spherical, having a smaller and narrower particle size compared with raw GFB...
September 19, 2017: International Journal of Pharmaceutics
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