Research Progress of Pulmonary Drug Delivery System / 医药导报

The pulmonary drug delivery system is a new drug delivery system developed in recent decade.Its composi-tion and mode of administration are obviously different from those of the general preparation.The advantages of pulmonary drug de-livery system include high local drug concentration,no first pass effect and fast drug absorption.Currently,it has become an impor-tant means of treating lung diseases and promoting the drug absorption of macromolecules.The drug categories,excipients,inhala-tion devices and clinical application of pulmonary drug administration were analysed by literature reviews.Furthermore,the re-search progress and characteristics of pulmonary drug delivery system in recent years were also summarized,which provide refer-ence for further study of pulmonary drug delivery.

Research Progress in the Influencing Factors in Particles Uptaking of Alveolar Macrophages / 中国药师

Pulmonary drug delivery has become a research focus in recent years, while the action between particles and pulmonary macrophages after particles transportation to lung tissue was paid little attention. Therapeutic efficacy can be enhanced by regulating the particles uptake action of pulmonary macrophages according to different diseases. Referring to a lot of articles, the relationship between common diseases and macrophages was reviewed and the influencing factors in the particles uptake of alveolar macrophages were sum-marized. The review laid foundation for the development of preparations and clinical application of pulmonary drug delivery systems.

Advances in particle engineering techniques for pulmonary drug delivery / 国际药学研究杂志

In recent years, pulmonary drug delivery as an attractive non-invasive administration way has been gaining intensive attention. The market for inhalable therapy has constantly grown over past years. Various particle engineering techniques have been employed to exploit the drug particles or drug-loaded particles used for pulmonary delivery with suitable physical properties. Those tailor-made inhalable particles offer the possibility of efficient delivering to lungs and the most optimal therapeutic outcomes. This review highlights the deposition mechanism of particles in lungs and several particle engineering techniques for pulmonary drug delivery, in particular two novel techniques PulmoSphere™ and TechnoSphere™, which have been used in the marketed products.

Advances in particle engineering techniques for pulmonary drug delivery / 国际药学研究杂志

In recent years,pulmonary drug delivery as an attractive non-invasive administration way has been gaining inten?sive attention. The market for inhalable therapy has constantly grown over past years. Various particle engineering techniques have been employed to exploit the drug particles or drug-loaded particles used for pulmonary delivery with suitable physical properties. Those tailor-made inhalable particles offer the possibility of efficient delivering to lungs and the most optimal therapeutic outcomes. This review highlights the deposition mechanism of particles in lungs and several particle engineering techniques for pulmonary drug delivery,in particular two novel techniques PulmoSphereTM and TechnoSphereTM,which have been used in the marketed products.

Preparation and in vitro evaluation of tetrandrine-loaded composite microspheres embedded with PLGA nanoparticles / 中国中药杂志

In this paper, we prepared a type of composite microspheres embedded with poly (lactic-co-glycolic acid) (PLGA) nanoparticles for efficient inhalation delivery of tetrandrine (Tet), which is a traditional Chinese medicine for anticancer, and studied its morphology, drug release profile, cytotoxicity and cellular uptake behavior. PLGA nanoparticles loading tetrandrine were prepared by emulsion solvent diffusion method, and composite microspheres were prepared by spray drying method with mannitol as matrix due to its osmotic effect. Scanning electronic microscopy, dynamic light scattering laser particle analyzer and confocal microscopy were applied to characterize the morphology and size of the microspheres. The drug loading rate, drug encapsulation efficiency and drug release properties were explored by RP-HPLC. The cytotoxicity in A549 cells between crude drug of Tet and Tet-loaded microspheres were compared by MTT assay. The cellular uptake behavior of microspheres in A549 cells was investigated using confocal laser scanning microscopy. The resultant microspheres were composed of 189 nm PLGA nanoparticles exhibited sizes ranging from 1 to 3 μm, with the highest deposition efficiency. The microspheres can easily be dissolved in a mimic lung environment and release redispersible PLGA nanoparticles. Compared with crude drug of Tet, Tet-loaded microspheres showed a certain sustained release property and higher cytotoxicity effect to A549 cells. The cellular uptake experiment demonstrated a higher excellent penetration ability of cells to nanoparticles and time-dependent uptake process. This study provides a basis for developing new inhalation therapies for lung cancer.

Pulmonary drug delivery systems and progress in their applications to lung disease treatment / 国际药学研究杂志

Pulmonary drug delivery systems (PDDS) have some advantages, including high drug accumulation in the lungs, no first pass effect, and rapid absorption of drugs. They have become a key way to treat lung diseases and improve the absorption of biomacromolecules. In this review, we analyze lung's physiological features, and discuss the main dosage forms of lung inhalations, their preparation methods, the evaluation methods, and the in vivo experimental methods. The applications of pulmonary drug delivery to lung diseases, including acute lung injury, pulmonary infection, pulmonary fibrosis, asthma, chronic obstructive pulmonary disease, and lung cancer, are also discussed.

Pulmonary drug delivery systems and progress in their applications to lung disease treatment / 国际药学研究杂志

Pulmonary drug delivery systems (PDDS) have some advantages, including high drug accumulation in the lungs, no first pass effect, and rapid absorption of drugs. They have become a key way to treat lung diseases and improve the absorption of biomacromolecules. In this review, we analyze lung′s physiological features, and discuss the main dosage forms of lung inhalations, their preparation methods, the evaluation methods, and the in vivo experimental methods. The applications of pulmonary drug delivery to lung diseases, including acute lung injury, pulmonary infection, pulmonary fibrosis, asthma, chronic obstructive pulmonary disease, and lung cancer, are also discussed.

Pulmonary drug delivery: A promising approach.

Pulmonary drug delivery has attracted tremendous scientific and biomedical interest in recent years and has progressed considerably within the context of local treatment for lung diseases, by virtue of enhanced local targeting and reduced systemic side effects with the administration of minute drug dosages. Furthermore, with the high surface area and permeability of the lung, the 21st century has seen a paradigm shift to inhaled therapy for systemic use. But the pulmonary tract tends to be considered as very promising and attractive route for the administration of active substances intended to treat local pulmonary e.g., asthma, chronic obstructive pulmonary disease (COPD), microbial infections) as well as systemic diseases. (e.g., diabetes) Recent progress within biotechnology has generated a group of novel protein and peptide drugs to which administration to the respiratory tract, to obtain systemic delivery seems advantageous compared to e.g. parenteral or gastrointestinal administration (tablets, capsules etc.). The low metabolic activity in the lungs allows systemic delivery without liver passage Hence lung is an attractive environment for biomolecules, which are highly susceptible to enzymatic degradation in the gastrointestinal tract (ventricle and guts) as well as hepatic degradation (first pass metabolism).

Pulmonary Peptidomimetic Drug and Peptide Transportand Peptide Transporters / 昆明医科大学学报

Recent studies show that peptide transporters expressed in respiratory tract play a major role in pulmonary peptidomimetic drug and peptide transport.In this article we reviewed the structure,localization,function and the transport mechanism of peptide transporters.