Article
Pharmacology & Pharmacy
Rachel Yoon Kyung Chang, Yuko Okamoto, Sandra Morales, Elizabeth Kutter, Hak -Kim Chan
Summary: This study formulated liquid phage for topical delivery using a metered-dose spray and evaluated its properties and efficacy. The results showed that the optimized phage-polymer spray formulations were easily sprayable, with minimal dripping and fast drying time. The phages released rapidly from the formulation and effectively inhibited the growth of Pseudomonas aeruginosa. Both phages remained stable during storage for eight weeks. This study suggests that the spray formulations containing non-ionic polymers in ethanol/water could be a promising therapeutic system for delivering phages.
EUROPEAN JOURNAL OF PHARMACEUTICS AND BIOPHARMACEUTICS
(2022)
Article
Microbiology
Samuel Namonyo, Gilda Carvalho, Jianhua Guo, Karen D. Weynberg
Summary: This study isolated and characterized four novel phages against multi-drug resistant Pseudomonas aeruginosa clinical strains from Australia, and proposed their potential use as phage therapy candidates.
Article
Multidisciplinary Sciences
Camilla D. de Mattos, Dominick R. Faith, Artem A. Nemudryi, Amelia K. Schmidt, DeAnna C. Bublitz, Lauren Hammond, Margie A. Kinnersley, Caleb M. Schwartzkopf, Autumn J. Robinson, Alex Joyce, Lia A. Michaels, Robert S. Brzozowski, Alison Coluccio, Denghui David Xing, Jumpei Uchiyama, Laura K. Jennings, Prahathees Eswara, Blake Wiedenheft, Patrick R. Secor
Summary: This study reveals how Pseudomonas aeruginosa assesses threats of cellular injury by using polyamines released by dying cells and linear DNA.
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
(2023)
Article
Microbiology
Lan Yang, Tingting Zhang, Linlin Li, Chao Zheng, Demeng Tan, Nannan Wu, Mingyang Wang, Tongyu Zhu
Summary: This study characterizes the bacteriophage L5 as a potential candidate for phage therapy in treating P. aeruginosa infection. The research identifies type IV pili as the phage receptors for L5.
FRONTIERS IN MICROBIOLOGY
(2022)
Article
Pharmacology & Pharmacy
Yue Cao, Dipesh Khanal, Jinhee Kim, Rachel Yoon Kyung Chang, Alex Seungyeon Byun, Sandra Morales, Mark M. Banaszak Holl, Hak-Kim Chan
Summary: This study investigates the effect of common organic solvents on the stability of bacteriophages. The results show that the bacteriophages are more stable in alcohols and DMSO, and myoviruses tend to be more stable than podoviruses. The choice of solvents for phage formulation depends on the specific phage and solvent types.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Pharmacology & Pharmacy
Nasser Alhajj, Niall J. O'Reilly, Helen Cathcart
Summary: This review discusses the challenges in developing ciprofloxacin powder for inhalation for CF patients, as well as the rationale behind recent formulations of ciprofloxacin dry powder for inhalation. The challenges include ciprofloxacin lung permeability, overproduction of viscous mucus, and bacterial biofilms. The review also explores current and emerging particle engineering approaches to overcome these challenges.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Article
Microbiology
Xu Yang, Anwarul Haque, Shigenobu Matsuzaki, Tetsuya Matsumoto, Shigeki Nakamura
Summary: The study investigated the use of bacteriophage KPP10 for treating Pseudomonas aeruginosa-induced pneumonia in mouse models. Results showed that phage treatment significantly improved survival rate, reduced bacterial count and inflammation, suggesting the potential of phage therapy for P. aeruginosa lung infections.
FRONTIERS IN MICROBIOLOGY
(2021)
Article
Pharmacology & Pharmacy
Antoine Guillon, Jeoffrey Pardessus, Guillaume L'Hostis, Cindy Fevre, Celine Barc, Emilie Dalloneau, Youenn Jouan, Elsa Bodier-Montagutelli, Yonatan Perez, Camille Thorey, Laurent Mereghetti, Maria Cabrera, Mickael Riou, Laurent Vecellio, Sandrine Le Guellec, Nathalie Heuze-Vourc'h
Summary: By selecting an active phage cocktail and optimizing aerosol delivery conditions, we were able to deliver high phage concentrations in the lungs, resulting in a rapid and marked reduction in P. aeruginosa density (1.5-log reduction, p < .001). No infective phage was detected in the sera and urines throughout the experiment.
BRITISH JOURNAL OF PHARMACOLOGY
(2021)
Article
Pharmacology & Pharmacy
Mengyu Li, Rachel Yoon Kyung Chang, Yu Lin, Sandra Morales, Elizabeth Kutter, Hak-Kim Chan
Summary: The spray-dried phage cocktail powder demonstrated stability, inhalability, and efficacy against various MDR P. aeruginosa strains causing pulmonary infections, broadening the bactericidal spectrum and reducing resistance emergence compared to single-phage formulations.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Microbiology
Xiao Wang, Jingjing Tang, Wen Dang, Zhen Xie, Fuhua Zhang, Xinwei Hao, Sihuai Sun, Xuan Liu, Yi Luo, Mengyuan Li, Yanchao Gu, Yao Wang, Qiwei Chen, Xihui Shen, Lei Xu
Summary: In this study, three bacteriophages capable of infecting Pseudomonas aeruginosa were isolated and their biological characteristics were investigated. The experiment showed that these phages were stable in different environments and could reduce P. aeruginosa biofilms, suggesting their potential as candidates for treating P. aeruginosa infections.
MICROBIOLOGY SPECTRUM
(2023)
Review
Infectious Diseases
Andrew Vaitekenas, Anna S. Tai, Joshua P. Ramsay, Stephen M. Stick, Anthony Kicic
Summary: Antimicrobial resistance is a significant threat in modern healthcare, particularly for bacterial infections in individuals with chronic conditions like cystic fibrosis. Pseudomonas aeruginosa infections are a major factor in CF lung disease, with high resistance to multiple antimicrobials. Phages show promise as an alternative therapy, but their narrow host range and phage resistance evolution may limit their efficacy. Developing phage mixtures with broad host ranges to prevent resistance evolution is a potential strategy, but further research is needed on CF-derived P. aeruginosa phage resistance mechanisms for effective phage therapy formulations.
Review
Medicine, General & Internal
David de la Rosa-Carrillo, Guillermo Suarez-Cuartin, Oriol Sibila, Rafael Golpe, Rosa-Maria Giron, Miguel-angel Martinez-Garcia
Summary: The use of inhaled antibiotics has expanded beyond cystic fibrosis patients to include non-CF bronchiectasis or chronic obstructive pulmonary disease patients. Inhaled antibiotics provide high concentrations at the site of infection, enhancing their effectiveness and allowing for long-term administration. New formulations of inhaled dry powder antibiotics offer advantages such as faster preparation and administration, as well as eliminating the need for cleaning nebulization equipment.
JOURNAL OF CLINICAL MEDICINE
(2023)
Article
Pharmacology & Pharmacy
Rachel Yoon Kyung Chang, Yuko Okamoto, Sandra Morales, Elizabeth Kutter, Hak-Kim Chan
Summary: This study aimed to formulate biologically stable phage hydrogels for controlled release of infective phages. The release profiles of phages were evaluated in different hydrogel formulations, showing promising results with certain combinations. The study demonstrated that certain hydrogels can maintain the stability of phages during storage.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2021)
Article
Immunology
Viviane de Cassia Oliveira, Stephan Steixner, Cassio do Nascimento, Valeria Oliveira Pagnano, Claudia Helena Silva-Lovato, Helena de Freitas Oliveira Paranhos, Doris Wilflingseder, Debora Coraca-Huber, Evandro Watanabe
Summary: The study evaluated the impact of bacteriophage infection on biofilm formation and virulence factor expression in Pseudomonas aeruginosa. It found that bacteriophages significantly altered early biofilm growth of P. aeruginosa and caused changes in the expression of genes related to virulence factors. Further investigation into the pathways and molecules involved in phage infection is necessary to better understand the response activation by P. aeruginosa.
MICROBIAL PATHOGENESIS
(2021)
Article
Chemistry, Medicinal
Mohammad Zaidur Rahman Sabuj, Md Abdur Rashid, Tim R. Dargaville, Nazrul Islam
Summary: This study investigated the stability of CIP-loaded polymer nanoparticles under normal and high stressed conditions, finding that high temperature and humidity led to changes in particle size, surface quality, and reduced aerosol performance.
Article
Pharmacology & Pharmacy
Ahmed H. Albariqi, Yuncheng Wang, Rachel Yoon Kyung Chang, Diana H. Quan, Xiaonan Wang, Stefanie Kalfas, John Drago, Warwick J. Britton, Hak-Kim Chan
Summary: This study investigated the pharmacokinetics and safety of inhaled dry powders of ivermectin and found that inhalation delivery improved the pharmacokinetic performance and maintained a high drug concentration in the respiratory tract, while the local toxicity was mild.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2022)
Review
Infectious Diseases
Sue C. Nang, Yu-Wei Lin, Aleksandra Petrovic Fabijan, Rachel Y. K. Chang, Gauri G. Rao, Jonathan Iredell, Hak-Kim Chan, Jian Li
Summary: This review examines the current literature on phage pharmacology and highlights major pharmacological challenges for phage therapy. The lack of PK/PD information represents a major challenge for phage therapy, as therapeutic phages are biological entities with complex PK/PD.
CLINICAL MICROBIOLOGY AND INFECTION
(2023)
Article
Pharmacology & Pharmacy
Yuncheng Wang, Dipesh Khanal, Adit B. Alreja, Hang Yang, Rachel Y. K. Chang, Waiting Tai, Mengyu Li, Daniel C. Nelson, Warwick J. Britton, Hak-Kim Chan
Summary: This study investigated the feasibility of producing inhalable powders of endolysins Cpl-1 and ClyJ-3 using spray drying method with excipients. The results showed that ClyJ-3 lost its bioactivity before the drying process, while Cpl-1 maintained its bioactivity in the spray-dried powders. Cpl-1 formulations with leucine and either lactose or trehalose exhibited promising physico-chemical properties and aerosol performances. These findings suggest that endolysin Cpl-1 can be formulated as spray dry powders for potential treatment of pulmonary infections.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Pharmacology & Pharmacy
Dipesh Khanal, Jinhee Kim, Jing Zhang, Wei-Ren Ke, Mark M. Banaszak Holl, Hak Kim Chan
Summary: The aim of this research was to use optical photothermal infrared spectroscopy (OPTIR) to analyse the chemical composition of pharmaceutical dry powder inhalation (DPI) aerosol particles. The study confirmed the presence of specific chemical peaks related to the drugs and excipients in the size-segregated particles of DPI formulations. It also found that the drug to excipient distribution ratio varied in different formulations, indicating heterogeneity. The results showed that OPTIR can serve as a valuable analytical platform for screening the physicochemical properties of DPI aerosols in solid state.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Chemistry, Multidisciplinary
Athiya Azeem, Gajendra Singh, Lunjian Li, Hak-Kim Chan, Runyu Yang, Shaokoon Cheng, Agisilaos Kourmatzis
Summary: This study quantified the probability of agglomerate-to-wall collision using a unique image processing technique. The purpose was to investigate the effects of flow rate and particle size on the percentage of colliding agglomerates within a powder dispersion device.
PHARMACEUTICAL RESEARCH
(2023)
Review
Chemistry, Multidisciplinary
Grace Tsz Yan Yau, Waiting Tai, Jonathon Carl Arnold, Hak-Kim Chan, Philip Chi Lip Kwok
Summary: The use of cannabidiol (CBD) for treating brain disorders has gained increasing interest. This review examines the preclinical and clinical evidence on the therapeutic use of CBD in treating various brain disorders, as well as different drug delivery approaches for CBD.
PHARMACEUTICAL RESEARCH
(2023)
Article
Oncology
Hiu Ting Chan, Satoshi Nagayama, Masumi Otaki, Yoon Ming Chin, Yosuke Fukunaga, Masashi Ueno, Yusuke Nakamura, Siew-Kee Low
Summary: This study compared the clinical utility and sensitivity of two different approaches to ctDNA analyses in colorectal cancer patients. It found that tumor-informed ctDNA analysis was more accurate in monitoring genetic mutations compared to tumor-agnostic analysis. Serial monitoring of ctDNA allowed for the early detection of disease recurrence, with a median of 5 months earlier than radiological imaging.
FRONTIERS IN ONCOLOGY
(2023)
Article
Pharmacology & Pharmacy
Qixuan Zhu, Dazhao Gou, Hak-Kim Chan, Agisilaos Kourmatzis, Runyu Yang
Summary: This study conducted a numerical investigation using coupled computational fluid dynamics (CFD) and discrete element method (DEM) to evaluate the impact of design changes in a commercial dry powder inhaler (DPI) device on the aerosolization of an API-only formulation. Six different designs were proposed by modifying the mouthpiece and chamber of the original geometry. The performances of these designs were evaluated in terms of powder deposition and fine powder fraction (FPF) in the device. The study found that the resistance and FPF emitted varied with different designs, highlighting the importance of the mouthpiece and chamber design on powder dispersion.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Infectious Diseases
Isaac Martin, Sandra Morales, Eric W. F. W. Alton, Jane C. Davies
Summary: This study found that bacteriophages can be used as adjuncts to treatment for antibiotic refractory infections, and the combination of phages with certain antibiotics may have synergistic effects. Furthermore, phages showed good bactericidal effects against antibiotic resistant Pseudomonas aeruginosa (Pa), which may be relevant to ongoing clinical trials.
Article
Computer Science, Interdisciplinary Applications
Zhiwei Shen, Jingliang Dong, Liam Milton-McGurk, Xinyu Cai, Hanieh Gholizadeh, Hak-Kim Chan, Ann Lee, Agisilaos Kourmatzis, Shaokoon Cheng
Summary: Understanding the effects of anatomical structures on nasal flow and particle deposition is important for drug delivery optimization and assessing the impact of pollutants and toxins inhalation. This study found that simplifying the geometry of the nasal cavity had minimal effect on airflow but influenced the location and quantity of particle deposition.
COMPUTER METHODS AND PROGRAMS IN BIOMEDICINE
(2023)
Article
Pharmacology & Pharmacy
Qixuan Zhu, Maziar Kakhi, Chandana Jayasundara, Ross Walenga, Srinivas Ravindra Babu Behara, Hak-Kim Chan, Runyu Yang
Summary: This study develops a numerical model to investigate the effect of aperture size on powder dispersion in dry powder inhalers. The results show that larger apertures can reduce the emptying time of the capsule and increase the particle evacuation velocity. However, the impact energy of collisions is not significantly affected by aperture size. It is also found that inside the capsule, particle-particle collisions are more frequent, while outside the capsule, particle-wall collisions are more frequent.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Article
Pharmacology & Pharmacy
Yue Cao, Dipesh Khanal, Jinhee Kim, Rachel Yoon Kyung Chang, Alex Seungyeon Byun, Sandra Morales, Mark M. Banaszak Holl, Hak-Kim Chan
Summary: This study investigates the effect of common organic solvents on the stability of bacteriophages. The results show that the bacteriophages are more stable in alcohols and DMSO, and myoviruses tend to be more stable than podoviruses. The choice of solvents for phage formulation depends on the specific phage and solvent types.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2023)
Review
Cell Biology
Rohan Flint, Daniel R. Laucirica, Hak-Kim Chan, Barbara J. Chang, Stephen M. Stick, Anthony Kicic
Summary: Pulmonary bacterial infections pose a significant health risk to individuals with chronic respiratory diseases, and the emergence of antimicrobial resistance has necessitated the development of alternative therapies. Phage therapy, which targets antimicrobial-resistant pathogens, shows promise as an adjunct or alternative to antibiotics. Delivery of phages to the lungs is crucial for respiratory infections, and nebulization has been identified as a potential method. However, the factors that affect phage stability during nebulized delivery have not been fully characterized.
Article
Pharmacology & Pharmacy
Greta Camilla Magnano, Marika Quadri, Elisabetta Palazzo, Roberta Lotti, Francesca Loschi, Stefano Dall'Acqua, Michela Abrami, Francesca Larese Filon, Alessandra Marconi, Dritan Hasa
Summary: This study aimed to investigate the loading of sildenafil citrate in three commercial transdermal vehicles using 3D full-thickness skin equivalent and compare the results with permeability experiments using porcine skin. The results showed that the results obtained using the 3D skin equivalent were comparable to those obtained using porcine skin, suggesting that the 3D skin model can be a valid alternative for ex-vivo skin absorption experiments.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2024)
Article
Pharmacology & Pharmacy
James W. Mckeage, Andrew Z. H. Tan, Andrew J. Taberner
Summary: Needle-free jet injection is a promising alternative drug delivery technique that offers rapid, non-invasive, and large-volume injections. The study presents a prototype multi-orifice nozzle and a computational fluid dynamic model to demonstrate the feasibility and effectiveness of this technology.
INTERNATIONAL JOURNAL OF PHARMACEUTICS
(2024)