Name: disposable dosators for pulmonary insufflation of therapeutic agents to small animals
Uploaded: 2017-03-30T13:00:00.000+00:00
Duration: 4 min 22 s
Description: Watch this Scientific Journal Video about Disposable Dosators for Pulmonary Insufflation of Therapeutic Agents to Small Animals at JoVE.com

作者诚挚地感谢过敏和传染病研究所的资金来进行这项研究。

1.充填机的组件的制备<ol><li>通过钻孔或通过简单地研磨或切断底部用砂轮或锋利的剪刀穿孔0.5mL的聚丙烯微量离心管的底部。确保该孔是在中心和是不超过2毫米，直径不小于1毫米的直径（ 图1）。 </li><li>穿孔的离心管的顶部。使用＃22的钻头（约4毫米直径），在帽的中心钻一个孔。这导致，将适合的滑动尖端注射器（ 图1）的孔。 </li><li>准备细筛将被插入到离心管。使由304不锈钢丝布，60×60目具有0.0045&quot;线径屏幕。用锡剪切屏幕或使用模到5毫米（ 图2）的外径打孔它们。 </li></ol> 2.充填机的组装<ol><li>无论是使用镊子或钝头针头的端部，插入到屏幕的离心管，并使得其覆盖所述开口它在底部就位。这将有助于启动之前支持粉末。 </li><li>压配合的离心尖端的窄端插入钝头针头的端部。用手或用台式机和导做到这一点。轻轻擦拭用乙醇清洁部件管的针和底部的顶部，以确保紧密的，弹性配合。 </li></ol> 3.灌装充填机<ol><li>使用分析微量天平，去皮装置和粉末的所需量装入剂量分配器。用于分散的典型粉末质量范围从1到10毫克。 </li><li>一旦填充，塞的离心管的顶部与棉花的分配和一对钳子的。这将防止粉末拉入注射器或掉落，同时允许气流通过计量器以分散粉末。 </li><lI&gt;合的离心管帽。 </li><li>如果没有被立即使用，密封顶部与实验室膜的少量以最小化粉末暴露于环境湿气。注意:通常，预加载的充填机应根据活性药物成分（API）的存储需求被存储。通常气溶胶粉末湿气敏感，应储存干燥的。 </li></ol> 4.设备作动<ol><li>拉回注射器至所需体积，其可以是应用特定的。对于豚鼠肺内施用，使用2毫升。分散效率与体积和致动过程中输送的空气的速度，以及所述粉末7的固有分散特性。在剂量分配器的顶部孔容纳滑动尖端注射器。 luer锁注射器可与适配器一起使用。 </li><li>插入注射器插入计量器的后端。 </li><li>插入计量器带入到t的针头端他在曝光室配料口。压下注射器有力地排出粉末离开装置并直接进入动物或进入曝光室或分析仪器（ 图3）。 </li></ol>

<ol>
	<li>Young, E. F., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inhaled+Pyrazinoic+Acid+Esters+for+the+Treatment+of+Tuberculosis.">Inhaled Pyrazinoic Acid Esters for the Treatment of Tuberculosis.</a> Pharmaceutical Research. , 1-11 (2016).</li><li>Hinds, W. C. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=.">.</a> Aerosol Technology: Properties, Behavior, and Measurement of Airborne Particles. , (2012).</li><li>Islam, N., Gladki, E. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dry+powder+inhalers+(DPIs)-A+review+of+device+reliability+and+innovation.">Dry powder inhalers (DPIs)-A review of device reliability and innovation.</a> International Journal of Pharmaceutics. 360 (1-2), 1-11 (2008).</li><li>Chan, H. K. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dry+powder+aerosol+delivery+systems:+current+and+future+research+directions.">Dry powder aerosol delivery systems: current and future research directions.</a> J Aerosol Med. 19 (1), 21-27 (2006).</li><li>Vehring, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pharmaceutical+Particle+Engineering+via+Spray+Drying.">Pharmaceutical Particle Engineering via Spray Drying.</a> Pharmaceutical Research. 25 (5), 999-1022 (2008).</li><li>Bosquillon, C., Lombry, C., Pr&#233;at, V., Vanbever, R. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Influence+of+formulation+excipients+and+physical+characteristics+of+inhalation+dry+powders+on+their+aerosolization+performance.">Influence of formulation excipients and physical characteristics of inhalation dry powders on their aerosolization performance.</a> Journal of Controlled Release. 70 (3), 329-339 (2001).</li><li>Hickey, A. J., Concessio, N. M., Van Oort, M. M., Platz, R. M. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Factors+influencing+the+dispersion+of+dry+powders+as+aerosols.">Factors influencing the dispersion of dry powders as aerosols.</a> Pharmaceutical Technology. 18 (8), 58-64 (1994).</li><li>Garcia-Contreras, L., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Inhaled+large+porous+particles+of+capreomycin+for+treatment+of+tuberculosis+in+a+guinea+pig+model.">Inhaled large porous particles of capreomycin for treatment of tuberculosis in a guinea pig model.</a> Antimicrob Agents Chemother. 51 (8), 2830-2836 (2007).</li><li>Durham, P. G., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Spray+Dried+Aerosol+Particles+of+Pyrazinoic+Acid+Salts+for+Tuberculosis+Therapy.">Spray Dried Aerosol Particles of Pyrazinoic Acid Salts for Tuberculosis Therapy.</a> Molecular Pharmaceutics. 12 (8), 2574-2581 (2015).</li><li>Sung, J. C., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dry+powder+nitroimidazopyran+antibiotic+PA-824+aerosol+for+inhalation.">Dry powder nitroimidazopyran antibiotic PA-824 aerosol for inhalation.</a> Antimicrob Agents Chemother. 53 (4), 1338-1343 (2009).</li><li>Guillon, A., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Pulmonary+delivery+of+dry+powders+to+rats:+tolerability+limits+of+an+intra-tracheal+administration+model.">Pulmonary delivery of dry powders to rats: tolerability limits of an intra-tracheal administration model.</a> Int J Pharm. 434 (1-2), 481-487 (2012).</li><li>Morello, M., et al. <a target="_blank" href="http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?db=PubMed&cmd=Search&doptcmdl=Citation&defaultField=Title+Word&term=Dry-powder+pulmonary+insufflation+in+the+mouse+for+application+to+vaccine+or+drug+studies.">Dry-powder pulmonary insufflation in the mouse for application to vaccine or drug studies.</a> Tuberculosis. 89 (5), 371-377 (2009).</li></ol>

Portions of the pharmacokinetic data was presented at Respiratory Drug Delivery 2014 in Fajardo, Puerto Rico and dosator depictions and additional pharmacokinetic data were presented at the annual meeting of the American Association of Pharmaceutical Scientists 2015 in Orlando, Florida.

从充填机将分散体适用于动物，其接收通过被动鼻式呼吸治疗剂量，表明分散成基本颗粒大小的气溶胶的相当大的比例。这些充填机可用于气管内给药， 在粉末性能体外评价，和通用干粉气雾剂的分散以供分析或有效的实验。如果用于肺内递送，它以使用空气的供选择的种类适当体积，如过度膨胀的肺部可引起组织损伤和歪曲药代动力学结果是重要的。 5毫升的量已在豚鼠中已经使?...

<html>新的治疗产品的开发需要在动物模型中的功效测试。管理的肺途径可用于局部和系统1输送药物。干粉气雾剂的评价必要的有效分散机构，以保持在一个曝光室或用于直接施用气管内高浓度。尽管存在解决方案通过被动吸入暴露动物的干粉气雾剂，最需要的粉末群众大过量输送2的剂量。 这就排除进行早期可行性研究，药物不足，可在研究或发展初期，以支持传统的气雾剂输送系统的剂量交付要求。 当设计气雾剂药物产品，空气动力学性能可以直接涉及递送效率和功效&gt; 3。粉末成气雾剂的分散需要能量输入足以克服颗粒间力，并且颗粒工程方法可以显着提高性能气雾剂4，5，6。我们已经开发出一种分散系统（计量器），它可以有效地雾化工程化干粉气雾剂用于直接肺吹入，分散体的目的为曝光系统或生成用于分析目的。

<table><tbody><tr><td>0.5 mL microcentrifuge tube</td><td>VWR</td><td>89000-026</td><td></td></tr><tr><td>High-Volume Particle-Filtering Stainless Steel Wire Cloth, Woven, 304 Stainless Steel, 60 x 60 Mesh, .0045&quot; Wire Diameter</td><td>McMaster Carr</td><td>9230T44</td><td></td></tr><tr><td>Stainless Steel Dispensing Needle, Straight, 18 Gauge, 1&quot; Long</td><td>McMaster Carr</td><td>75165A676</td><td>Any luer-fit needle will suffice</td></tr><tr><td>Cotton balls</td><td>McMaster Carr</td><td>54845T16</td><td></td></tr><tr><td>Parafilm M&amp;reg; Laboratory Film</td><td>VWR</td><td>100229-550</td><td></td></tr><tr><td>Black-Oxide High-Speed Steel Jobbers&#039; Drill Bit, Wire Gauge 22, 3-1/8&quot; Overall Length, 1.8&quot; Drill Depth, 135Deg Point</td><td>McMaster Carr</td><td>2901A195</td><td></td></tr></tbody></table>

disposable dosators for pulmonary insufflation of therapeutic agents to small animals

Development of new therapeutic products requires efficacy testing in an animal model. The pulmonary route of administration can be utilized to deliver drugs locally and systemically. Evaluation of dry powder aerosols necessitates an efficient dispersion mechanism to maintain high concentrations in an exposure chamber or for direct endotracheal administration. While solutions exist to expose animals by passive inhalation to dry powder aerosols, most require masses of powder in large excess of the dose delivered. This precludes conducting early feasibility studies as insufficient drug is available at the research or early development stage to support the dose delivery requirements for conventional aerosol delivery systems. When designing an aerosol drug product, aerodynamic performance can relate directly to delivery efficiency and efficacy. Dispersion of powder into an aerosol requires energy input sufficient to overcome interparticulate forces, and particle engineering approaches can substantially improve aerosol performance. We have developed a dispersion system (dosator) which can aerosolize engineered dry powder aerosols efficiently for the purpose of direct pulmonary insufflation, dispersion into an exposure system or generation for analytical purposes.

用于容易地分散的粉剂如喷雾干燥的，意图用于肺部递送5，8，9，所述充填机输送bolus剂量离开装置。有许多应用程序的充填机，包括体外颗粒表征，在活的动物直接肺内施用，和被动吸入气雾剂系统发电。 为了证明从充填机粉末分散体的效率，先?...

Watch this Scientific Journal Video about Disposable Dosators for Pulmonary Insufflation of Therapeutic Agents to Small Animals at JoVE.com

Disposable Dosators for Pulmonary Insufflation of Therapeutic Agents to Small Animals

在药物对肺部给药的发展，有必要在动物模型来评价药代动力学和药效。我们呈现给从可以用于施用肺内干粉气雾剂到啮齿动物的现成组件构建的一次性气雾剂分散系统的方法。

一次性充填机对治疗药物的肺吹入小动物

Development of new therapeutic products requires efficacy testing in an animal model. The pulmonary route of administration can be utilized to deliver ...

disposable-dosators-for-pulmonary-insufflation-therapeutic-agents-to

Research

JoVE Journal

Medicine

7.6K 次观看.  RTI International. 在药物对肺部给药的发展，有必要在动物模型来评价药代动力学和药效。我们呈现给从可以用于施用肺内干粉气雾剂到啮齿动物的现成组件构建的一次性气雾剂分散系统的方法。 

视频: Disposable Dosators for Pulmonary Insufflation of Therapeutic Agents to Small Animals

Direct Tracheal Instillation of Solutes into Mouse Lung

Intratracheal instillations deliver solutes directly into the lungs. This procedure targets the delivery of the instillate into the distal regions of the lung, and is therefore often incorporated in studies aimed at studying alveoli. We provide a detailed survival protocol for performing intratracheal instillations in mice. Using this approach, one can target delivery of test solutes or solids (such as lung therapeutics, surfactants, viruses, and small oligonucleotides) into the distal lung. Tracheal instillations may be the preferred methodology, over inhalation protocols that may primarily target the upper respiratory tract and possibly expose the investigator to potentially hazardous substances. Additionally, in using the tracheal instillation protocol, animals can fully recover from the non-invasive procedure. This allows for making subsequent physiological measurements on test animals, or reinstallation using the same animal. The amount of instillate introduced into the lung must be carefully determined and osmotically balanced to ensure animal recovery. Typically, 30-75 &mu;L instillate volume can be introduced into mouse lung.

Intratracheal instillations deliver solutes directly into the lungs. This procedure targets the delivery of the instillate into the distal regions of the lung, and is therefore often incorporated in studies aimed at studying alveoli. We provide a detailed survival protocol for performing intratracheal instillations in mice.

溶质直接气管滴入小鼠肺

Intratracheal instillations deliver solutes directly into the lungs.  This procedure targets the delivery of the instillate into the distal regions of the ...

科研

生物学

An Improved Method for Rapid Intubation of the Trachea in Mice

Despite some anatomical and physiological differences, mouse models continue to be an essential tool for studying human lung disease. Bleomycin toxicity is a commonly used model to study both acute lung injury and fibrosis, and multiple methods have been developed for administering bleomycin (and other toxic agents) into the lungs. However, many of these approaches, such as transtracheal instillation, have inherent drawbacks, including the need for strong anesthetics and survival surgery. This paper reports a quick, reproducible method of intratracheal intubation that involves mild inhaled anesthesia, visualization of the trachea, and the use of a surrogate spirometer to confirm exposure. As a proof of concept, 8-12 week old C57BL/6 mice were administered either 2.0 U/kg of bleomycin or an equivalent volume of PBS, and both damage and fibrotic endpoints were measured post-exposure. This procedure allows researchers to treat a large cohort of mice in a relatively short period with little expense and minimal post-procedure care.

This article presents a rapid and simple method for administering bleomycin directly into the mouse trachea via intubation. Key advantages of this method are that it is highly reproducible, easy to master, and does not require specialized equipment or lengthy recovery times.

在小鼠气管插管快速的改进方法

Despite some anatomical and physiological differences, mouse models continue to be an essential tool for studying human lung disease. Bleomycin toxicity ...

医学

Dry Powder and Nebulized Aerosol Inhalation of Pharmaceuticals Delivered to Mice Using a Nose-only Exposure System

Obstructive respiratory diseases like asthma and chronic obstructive pulmonary disease (COPD) are currently treated by inhaled anti-inflammatory and bronchodilator drugs. Despite the availability of multiple treatments, both diseases are growing public health concerns. The majority of asthma patients are well controlled on current inhaled therapies but a substantial number of patients with severe asthma are not. Asthma affects an estimated 300 million people worldwide and approximately 20 percent have a severe form of the disease. In contrast to asthma, there are few effective therapies for COPD. An estimated 10% of the population has COPD and the trend in death rates is increasing for COPD while decreasing for other major diseases. Although developing drugs for inhaled delivery is challenging, the nose-only inhalation unit enables direct delivery of novel drugs to the lung of rodents for pre-clinical efficacy and safety/toxicology studies. Inhaled drug delivery has multiple advantages for respiratory diseases, where high concentration in the lung improves efficacy and minimizes systemic side effects. Inhaled corticosteroids and bronchodilators benefit from these advantages and inhaled delivery may also hold potential for future biologic therapies. The inhalation unit described herein can generate, sample for characterization, and uniformly deposit a drug aerosol in the lungs of rodents. This enables the pre-clinical determination of the efficacy and safety of drug doses deposited in the lungs of rodents, key data required before initiating clinical development.

The inhalation unit described herein can generate, sample for characterization, and uniformly deposit a drug aerosol in the lungs of rodents. This enables the pre-clinical determination of the efficacy and safety of drug doses deposited in the lungs; key data enabling clinical inhaled drug development.

干粉和药品的雾化吸入气雾剂递送小鼠使用鼻只曝光系统

Obstructive respiratory diseases like asthma and chronic obstructive pulmonary disease (COPD) are currently treated by inhaled anti-inflammatory and ...

Direct Intrabronchial Administration to Improve the Selective Agent Deposition Within the Mouse Lung

Intratracheal (IT) administration of experimental agents is an essential technique in murine models of diffuse lung diseases, such as bleomycin-induced pulmonary fibrosis.&#160; However, distribution of intratracheally-administered agents to the distal mouse lung is often asymmetric, with lung parenchymal concentrations increased in the smaller (but equally accessible) left lung of the mouse.&#160; Described in this report is a novel intrabronchial (IB) approach to cannulate the left and/or right lungs of living mice non-operatively.&#160; It is also demonstrated how this approach can be used to selectively administer agents to one lung or adapted (via dose-adjusted IB delivery) to improve the left-right symmetry of lung delivery of experimental agents, thereby improving models of diffuse lung disease such as bleomycin-induced pulmonary fibrosis.

Intratracheal (IT) administration of experimental agents in mice often results in asymmetric delivery to the distal lungs.&#160; In this report, we describe a direct intrabronchial (IB) approach to cannulate each lung in living mice non-operatively.&#160; This approach can be used to selectively administer agents to one lung or may be adapted to improve the symmetric agent delivery to both lungs.

直接注射内管理,改善小鼠肺内的选择性代理沉积

Intratracheal (IT) administration of experimental agents is an essential technique in murine models of diffuse lung diseases, such as bleomycin-induced ...

Intratracheal Administration of Dry Powder Formulation in Mice

In the development of inhalable dry powder formulations, it is essential to evaluate their biological activities in preclinical animal models. This paper introduces a noninvasive method of intratracheal delivery of dry powder formulation in mice. A dry powder loading device that consists of a 200 &#181;L gel loading pipette tip connected to an 1 mL syringe via a three-way stopcock is presented. A small amount of dry powder (1-2 mg) is loaded into the pipette tip and dispersed by 0.6 mL of air in the syringe. Because pipette tips are disposable and inexpensive, different dry powder formulations can be loaded into different tips in advance. Various formulations can be evaluated in the same animal experiment without device cleaning and dose refilling, thereby saving time and eliminating the risk of cross-contamination from residual powder. The extent of powder dispersion can be inspected by the amount of powder remaining in the pipette tip. A protocol of intubation in mouse with a custom-made light source and a guiding cannula is included. Proper intubation is one of the key factors that influences the intratracheal delivery of dry powder formulation to the deep lung region of the mouse.

Dry powder formulations for inhalation have great potential in treating respiratory diseases. Before entering human studies, it is necessary to evaluate the efficacy of the dry powder formulation in preclinical studies. A simple and noninvasive method of the administration of dry powder in mice through the intratracheal route is presented.

小鼠干粉配方的内经管理

In the development of inhalable dry powder formulations, it is essential to evaluate their biological activities in preclinical animal models. This paper ...

Halogenated Agent Delivery in Porcine Model of Acute Respiratory Distress Syndrome via an Intensive Care Unit Type Device

Acute respiratory distress syndrome (ARDS) is a common cause of hypoxemic respiratory failure and death in critically ill patients, and there is an urgent need to find effective therapies. Preclinical studies have shown that inhaled halogenated agents may have beneficial effects in animal models of ARDS. The development of new devices to administer halogenated agents using modern intensive care unit (ICU) ventilators has significantly simplified the dispensing of halogenated agents to ICU patients. Because previous experimental and clinical research suggested potential benefits of halogenated volatiles, such as sevoflurane or isoflurane, for lung alveolar epithelial injury and inflammation, two pathophysiologic landmarks of diffuse alveolar damage during ARDS, we designed an animal model to understand the mechanisms of the effects of halogenated agents on lung injury and repair. After general anesthesia, tracheal intubation, and the initiation of mechanical ventilation, ARDS was induced in piglets via the intratracheal instillation of hydrochloric acid. Then, the piglets were sedated with inhaled sevoflurane or isoflurane using an ICU-type device, and the animals were ventilated with lung-protective mechanical ventilation during a 4 h period. During the study period, blood and alveolar samples were collected to evaluate arterial oxygenation, the permeability of the alveolar-capillary membrane, alveolar fluid clearance, and lung inflammation. Mechanical ventilation parameters were also collected throughout the experiment. Although this model induced a marked decrease in arterial oxygenation with altered alveolar-capillary permeability, it is reproducible and is characterized by a rapid onset, good stability over time, and no fatal complications.
We have developed a piglet model of acid aspiration that reproduces most of the physiological, biological, and pathological features of clinical ARDS, and it will be helpful to further our understanding of the potential lung-protective effects of halogenated agents delivered through devices used for inhaled ICU sedation.

We describe a model of hydrochloric acid-induced acute respiratory distress syndrome (ARDS) in piglets receiving sedation with halogenated agents, isoflurane and sevoflurane, through a device used for inhaled intensive care sedation. This model can be used to investigate the biological mechanisms of halogenated agents on lung injury and repair.

重症监护病房型装置在猪模型急性呼吸窘迫综合征中的卤化剂递送

Acute respiratory distress syndrome (ARDS) is a common cause of hypoxemic respiratory failure and death in critically ill patients, and there is an urgent ...

A Minimally Invasive Method for Intratracheal Instillation of Drugs in Neonatal Rodents to Treat Lung Disease

Treatment of neonatal rodent with drugs instilled directly into the trachea could serve as a valuable tool to study the impact of a locally administered drug. This has direct translational impact because surfactant and drugs are administered locally into the lungs. Though the literature has many publications describing minimally invasive transoral intubation of adult mice and rats in therapeutic experiments, this approach in neonatal rat pups is lacking. The small size of orotracheal region/pharynx in the pups makes visualization of laryngeal lumen (vocal cords) difficult, contributing to the variable success rate of intratracheal drug delivery. We hereby demonstrate effective oral intubation of neonatal rat pup - a technique that is non-traumatic and minimally-invasive, so that it can be used for serial administration of drugs. We used an operating otoscope with an illumination system and a magnifying lens to visualize the tracheal opening of the rat neonates. The drug is then instilled using a 1 mL syringe connected to a pipette tip. The accuracy of the delivery method was demonstrated using Evans blue dye administration. This method is easy to get trained in and could serve as an effective way to instill drugs into trachea. This method could also be used for administration of inoculum or agents to simulate disease conditions in animals and, also, for cell-based treatment strategies for various lung diseases.

This technique of instilling drugs directly into the trachea of neonatal rodents is important in studying the impact of locally administered drugs or biologicals on neonatal lung diseases. Additionally, this method can also be used for inducing lung injury in animal models.

一种新生儿啮齿动物气管内滴注药物治疗肺部疾病的微创方法

Treatment of neonatal rodent with drugs instilled directly into the trachea could serve as a valuable tool to study the impact of a locally administered ...

可定制的一次性给药器，用于将干粉气雾剂药物输送给小鼠

Disposable Dosators Intended for Dry Powder Delivery to Mice

Dry powder inhalers offer numerous advantages for delivering drugs to the lungs, including stable solid-state drug formulations, device portability, bolus metering and dosing, and a propellant-free dispersal mechanism. To develop pharmaceutical dry powder aerosol products, robust in vivo testing is essential. Typically, initial studies involve using a murine model for preliminary evaluation before conducting formal studies in larger animal species. However, a significant limitation in this approach is the lack of suitable device technology to accurately and reproducibly deliver dry powders to small animals, hindering such models&#39; utility. To address these challenges, disposable syringe dosators were developed specifically for intrapulmonary delivery of dry powders in doses appropriate for mice. These dosators load and deliver a predetermined amount of powder obtained from a uniform bulk density powder bed. This discrete control is achieved by inserting a blunt needle to a fixed depth (tamping) into the powder bed, removing a fixed quantity each time. Notably, this dosing pattern has proven effective for a range of spray-dried powders. In experiments involving four different model spray-dried powders, the dosators demonstrated the ability to achieve doses within the range of 30 to 1100 &#181;g. The achieved dose was influenced by factors such as the number of tamps, the size of the dosator needle, and the specific formulation used. One of the key benefits of these dosators is their ease of manufacturing, making them accessible and cost-effective for delivering dry powders to mice during initial proof-of-concept studies. The disposable nature of the dosators facilitates use in animal procedure rooms, where cleaning and refilling reusable systems and weighing materials is inconvenient. Thus, developing disposable syringe dosators has addressed a significant hurdle in murine dry powder delivery for proof-of-concept studies, enabling researchers to conduct more accurate and reproducible preliminary studies in small animal models for pulmonary drug delivery.

作者聚焦：开发一次性给药剂，用于小动物模型中干粉吸入器的临床前 测试 

Pharmaceutical dry powder development necessitates reliable in vivo testing, often using a murine model. Device technology for accurately and reproducibly delivering dry powder aerosols to mice is restricted. This study presents disposable dosators for pulmonary drug delivery at mouse-relevant doses, aiding initial proof-of-concept research.

用于将干粉输送给小鼠的一次性给药器

Dry powder inhalers offer numerous advantages for delivering drugs to the lungs, including stable solid-state drug formulations, device portability, bolus ...

一次性充填机对治疗药物的肺吹入小动物

摘要

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此视频中的章节

溶质直接气管滴入小鼠肺

在小鼠气管插管快速的改进方法

干粉和药品的雾化吸入气雾剂递送小鼠使用鼻只曝光系统

直接注射内管理,改善小鼠肺内的选择性代理沉积

小鼠干粉配方的内经管理

重症监护病房型装置在猪模型急性呼吸窘迫综合征中的卤化剂递送

一种新生儿啮齿动物气管内滴注药物治疗肺部疾病的微创方法

用于将干粉输送给小鼠的一次性给药器

用于将干粉输送给小鼠的一次性给药器

用于将干粉输送给小鼠的一次性给药器