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Pangeni R, Hassan AAM, Farkas D, Sudarjat H, Longest W, Hindle M, Xu Q. New Air-Jet Dry Powder Insufflator for High-Efficiency Aerosol Delivery to Rats. Mol Pharm 2023; 20:2207-2216. [PMID: 36938947 DOI: 10.1021/acs.molpharmaceut.3c00007] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2023]
Abstract
Pulmonary deposition of lung-targeted therapeutic aerosols can achieve direct drug delivery to the site of action, thereby enhancing the efficacy and reducing systemic exposure. In this study, we investigated the in vitro and in vivo aerosol performance of the novel small animal air-jet dry powder insufflator (Rat AJ DPI) using spray-dried albuterol excipient-enhanced-growth (EEG) powder as a model formulation. The in vitro aerosolization performance of the optimized albuterol EEG powder was first assessed using the Rat AJ DPI. The performance of Rat AJ DPI to deliver albuterol EEG aerosol to rat lungs was then compared to that of the Penn-Century Insufflator. Albuterol EEG powders dispersed using the Rat AJ DPI demonstrated narrow unimodal aerosol size distribution profiles, which were independent of the loaded powder dose (1, 2, and 5 mg). In addition, the span value for Rat AJ DPI (5 mg powder mass) was 1.32, which was 4.2-fold lower than that for Penn-Century insufflator (5 mg powder mass). At a higher loaded mass of 5 mg, the Rat AJ DPI delivered significantly larger doses to rat lungs compared with the Penn-Century DPI. The Rat AJ DPI with hand actuation delivered approximately 85% of the total emitted dose (2 and 5 mg loadings), which was comparatively higher than that for Penn-Century DPI (approximately 75%). In addition, percentage deposition in each of the lung lobes for the Rat AJ DPI was observed to be independent of the administration dose (2 and 5 mg loadings) with coefficients of variation below 12%, except in the right middle lobe. Automatic actuation of a 5 mg powder mass using the Rat AJ DPI demonstrated a similar delivered dose compared to manual actuation of the same dose, with 82% of the total emitted dose reaching the lung lobes. High-efficiency delivery of the aerosol to the lobar lung region and low sensitivity of the interlobar delivery efficiency to the loaded dose highlight the suitability of the new air-jet DPI for administering therapeutic pharmaceutical aerosols to small test animals.
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Affiliation(s)
- Rudra Pangeni
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Amr Ali Mohamed Hassan
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Dale Farkas
- Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Hadi Sudarjat
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Worth Longest
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States.,Department of Mechanical and Nuclear Engineering, Virginia Commonwealth University, Richmond, Virginia 23284, United States
| | - Michael Hindle
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States
| | - Qingguo Xu
- Department of Pharmaceutics, Virginia Commonwealth University, Richmond, Virginia 23298, United States.,Department of Ophthalmology, Massey Cancer Center, Center for Pharmaceutical Engineering, and Institute for Structural Biology, Drug Discovery & Development (ISB3D), Virginia Commonwealth University, Richmond, Virginia 23284, United States
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2
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Lin CM, Huang TH, Chi MC, Guo SE, Lee CW, Hwang SL, Shi CS. N-acetylcysteine alleviates fine particulate matter (PM2.5)-induced lung injury by attenuation of ROS-mediated recruitment of neutrophils and Ly6C high monocytes and lung inflammation. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2022; 239:113632. [PMID: 35594827 DOI: 10.1016/j.ecoenv.2022.113632] [Citation(s) in RCA: 15] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2021] [Revised: 05/06/2022] [Accepted: 05/07/2022] [Indexed: 06/15/2023]
Abstract
BACKGROUND Exposure to particulate matter (PM) may contribute to lung inflammation and injury. The therapeutic effect of N-acetylcysteine (NAC), a well-known antioxidant, with regards to the prevention and treatment of fine PM (PM2.5)-induced lung injury is poorly understood. This study aimed to determine the effect of PM2.5 on the recruitment of neutrophils and Ly6Chigh monocytes into lung alveoli and the production of proinflammatory proteins by stimulating the generation of reactive oxygen species (ROS), and to investigate the therapeutic effect of NAC on PM2.5-induced lung injury. METHODS C57BL/6 mice were exposed to a single administration of PM2.5 (200 μg/100 μl/mouse) or phosphate-buffered saline (control) via intratracheal instillation. The mice were injected intratracheally via a microsprayer aerosolizer with NAC (20 or 40 mg/kg) 1 h before PM2.5 instillation and 24 h after PM2.5 instillation. Total protein, VEGF, IL-6, and TNF-α in bronchoalveolar lavage fluid (BALF) were measured. Oxidative stress was evaluated by determining levels of malondialdehyde (MDA) and nitrite in BALF. Flow cytometric analysis was used to identify and quantify neutrophils and Ly6Chigh and Ly6Clow monocyte subsets. RESULTS Neutrophil count, total protein, and VEGF content in BALF significantly increased after PM2.5 exposure and reached the highest level on day 2. Increased levels of TNF-alpha, IL-6, nitrite, and MDA in BALF were also noted. Flow cytometric analysis showed increased recruitment of neutrophils and Ly6Chigh, but not Ly6Clow monocytes, into lung alveoli. Treatment with NAC via the intratracheal spray significantly attenuated the recruitment of neutrophils and Ly6Chigh monocytes into lung alveoli in PM2.5-treated mice in a dose-dependent manner. Furthermore, NAC significantly attenuated the production of total protein, VEGF, nitrite, and MDA in the mice with PM2.5-induced lung injury in a dose-dependent manner. CONCLUSION PM2.5-induced lung injury caused by the generation of oxidative stress led to the recruitment of neutrophils and Ly6Chigh monocytes, and production of inflammatory proteins. NAC treatment alleviated PM2.5-induced lung injury by attenuating the ROS-mediated recruitment of neutrophils and Ly6Chigh monocytes and lung inflammation.
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Affiliation(s)
- Chieh-Mo Lin
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Nursing, Chang Gung University of Science and Technology, Chiayi Campus, Puzi City, Chiayi County, Taiwan
| | - Tzu-Hsiung Huang
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Respiratory Therapy, Chang Gung Memorial Hospital, Puzi City, Chiayi County, Taiwan
| | - Miao-Ching Chi
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Chronic Disease and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Respiratory Care, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Su-Er Guo
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Chronic Disease and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Nursing and Graduate Institute of Nursing, College of Nursing, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan
| | - Chiang-Wen Lee
- Department of Safety Health and Environmental Engineering, Ming Chi University of Technology, New Taipei City, Taiwan; Department of Nursing, Division of Basic Medical Sciences, Chronic Diseases and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Department of Orthopaedic Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County, Taiwan
| | - Su-Lun Hwang
- Department of Pulmonary and Critical Care Medicine, Chiayi Chang Gung Memorial Hospital, Chang Gung Medical Foundation, Puzi City, Chiayi County, Taiwan; Chronic Disease and Health Promotion Research Center, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan; Department of Nursing and Graduate Institute of Nursing, College of Nursing, Chang Gung University of Science and Technology, Puzi City, Chiayi County, Taiwan
| | - Chung-Sheng Shi
- Graduate Institute of Clinical Medical Sciences, College of Medicine, Chang Gung University, Taoyuan City, Taiwan; Division of Colon and Rectal Surgery, Department of Surgery, Chang Gung Memorial Hospital, Puzi City, Chiayi County, Taiwan.
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3
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Zhang H, Chen F, Li Y, Shan X, Yin L, Hao X, Zhong Y. The effects of autophagy in rat tracheal epithelial cells induced by silver nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:27565-27576. [PMID: 33515144 DOI: 10.1007/s11356-020-12259-w] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2020] [Accepted: 12/28/2020] [Indexed: 06/12/2023]
Abstract
The massive use of silver nanoparticles (AgNPs) is potentially harmful to exposed humans. Although previous studies have found that AgNPs can induce cell autophagy, few studies have focused on the toxic pathways and mechanisms of autophagy induced by AgNPs in rat respiratory epithelial (RTE) cells. In this study, RTE cells were exposed to two kinds of AgNPs in vitro to ascertain the influence of mTOR-autophagy pathway-associated protein expression, including Beclin1, LC3B, Atg5, and Atg7. After exposure to different sizes and concentrations of AgNPs for 12 h, the uptake of silver in RTE cells reached 0.45 μg/L to 1.11 μg/L, indicating that AgNPs can enter RTE cells, leading to toxic effects. Our study found that this toxic effect was related to autophagy caused by ROS accumulation that was mediated by the mTOR pathway. With increasing AgNP exposure concentrations, the expression of p-mTOR was significantly downregulated, and expression of the autophagy-related proteins Beclin1, LC3B, Atg5, and Atg7 was significantly increased in RTE cells in all exposed groups. At a concentration of 1000 μg/L, the expression of LC3BII/LC3BI in all exposed groups was 24.49 times and 12.71 times that of the control, and the expression of Atg7 in all exposed groups was 23.21 times and 13.21 times that of the control. The upregulation of autophagy-related proteins in the AgNP-10 nm exposure groups was greater than that of the AgNP-100 nm exposure group. In summary, the mTOR pathway mediates AgNP-induced autophagy in RTE cells, which leads to damage to the respiratory system barrier and human health risks. This study can facilitate the development of prevention and intervention policies against adverse consequences induced by AgNPs.
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Affiliation(s)
- Hangjun Zhang
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China
| | - Feifei Chen
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China
| | - Yan Li
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China
| | - Xiaodong Shan
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China
| | - Lu Yin
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China
| | - Xiaojing Hao
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China
| | - Yuchi Zhong
- School of Life and Environmental Sciences, Hangzhou Normal University, Yuhangtang Road 2318#, Hangzhou, 311121, Zhejiang Province, China.
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Jara MO, Warnken ZN, Sahakijpijarn S, Moon C, Maier EY, Christensen DJ, Koleng JJ, Peters JI, Hackman Maier SD, Williams Iii RO. Niclosamide inhalation powder made by thin-film freezing: Multi-dose tolerability and exposure in rats and pharmacokinetics in hamsters. Int J Pharm 2021; 603:120701. [PMID: 33989748 PMCID: PMC8112893 DOI: 10.1016/j.ijpharm.2021.120701] [Citation(s) in RCA: 20] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Revised: 05/05/2021] [Accepted: 05/08/2021] [Indexed: 02/06/2023]
Abstract
In this work, we have developed and tested a dry powder form of niclosamide made by thin-film freezing (TFF) and administered it by inhalation to rats and hamsters to gather data about its toxicology and pharmacokinetics. Niclosamide, a poorly water-soluble drug, is an interesting drug candidate because it was approved over 60 years ago for use as an anthelmintic medication, but recent studies demonstrated its potential as a broad-spectrum antiviral with pharmacological effect against SARS-CoV-2 infection. TFF was used to develop a niclosamide inhalation powder composition that exhibited acceptable aerosol performance with a fine particle fraction (FPF) of 86.0% and a mass median aerodynamic diameter (MMAD) and geometric standard deviation (GSD) of 1.11 µm and 2.84, respectively. This formulation not only proved to be safe after an acute three-day, multi-dose tolerability and exposure study in rats as evidenced by histopathology analysis, and also was able to achieve lung concentrations above the required IC90 levels for at least 24 h after a single administration in a Syrian hamster model. To conclude, we successfully developed a niclosamide dry powder inhalation that overcomes niclosamide’s limitation of poor oral bioavailability by targeting the drug directly to the primary site of infection, the lungs.
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Affiliation(s)
- Miguel O Jara
- Molecular Pharmaceutics and Drug Delivery Division, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA
| | - Zachary N Warnken
- Molecular Pharmaceutics and Drug Delivery Division, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA.
| | - Sawittree Sahakijpijarn
- Molecular Pharmaceutics and Drug Delivery Division, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA
| | - Chaeho Moon
- Molecular Pharmaceutics and Drug Delivery Division, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA
| | - Esther Y Maier
- Drug Dynamics Institute, College of Pharmacy, The University of Texas at Austin, Austin, TX 78712, USA
| | | | | | - Jay I Peters
- UT- Health San Antonio Department of Medicine, Division of Pulmonary/Critical Care Medicine, San Antonio, TX 78229, USA
| | | | - Robert O Williams Iii
- Molecular Pharmaceutics and Drug Delivery Division, College of Pharmacy, The University of Texas at Austin, 2409 University Avenue, Austin, TX 78712, USA.
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Leibrock L, Wagener S, Singh AV, Laux P, Luch A. Nanoparticle induced barrier function assessment at liquid-liquid and air-liquid interface in novel human lung epithelia cell lines. Toxicol Res (Camb) 2019; 8:1016-1027. [PMID: 32153768 PMCID: PMC7021197 DOI: 10.1039/c9tx00179d] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2019] [Accepted: 10/14/2019] [Indexed: 01/05/2023] Open
Abstract
Inhalation is the most relevant entry point for nanoparticles (NPs) into the human body. To date, toxicity testing of nanomaterials in respect to oral, dermal and inhalative application is mainly based on animal experiments. The development of alternative test methods is the subject of current research. In vitro models can help to investigate mechanistic aspects, as e.g. cellular uptake or genotoxicity and might help to reduce in vivo testing. Lung cell lines are proper in vitro tools to assess NP toxicity. In respect to this, various cell models have been developed during the recent years, but often lack in a proper intact barrier function. However, besides other important in vivo criteria which are still missing like e.g. circulation, this is one basic prerequisite to come closer to the in vivo situation in certain mechanistic aspects such as particle translocation which is an important task for risk assessment of nanomaterials. Novel developed in vitro models may help to investigate the translocation of nanomaterials from the lung. We investigated the barrier function of the recently developed human lung cell lines CI-hAELVi and CI-huAEC. The cells were further exposed to CeO2 NPs and ZnO NPs, and their suitability as in vitro models for toxicological investigations was proven. The obtained data were compared with data generated with the A549 cell line. Measurement of transepithelial resistance and immunohistochemical examination of tight junctions confirmed the formation of a functional barrier for both cell lines for submerged and air-liquid cultivation. For particle exposure, hAELVi and huAEC cells showed comparable results to A549 cells without losing the barrier function. CeO2 NP exposure revealed no toxicity for all cell lines. In contrast, ZnO NPs was toxic for all cell lines at a concentration between 10-50 μg ml-1. Due to the comparable results to A549 cells CI-hAELVi and CI-huAEC offer new opportunities to investigate nanoparticle cell interactions more realistic than recent 2D cell models.
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Affiliation(s)
- Lars Leibrock
- German Federal Institute for Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Straße 8-10 , 10589 Berlin , Germany .
| | - Sandra Wagener
- German Federal Institute for Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Straße 8-10 , 10589 Berlin , Germany .
| | - Ajay Vikram Singh
- German Federal Institute for Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Straße 8-10 , 10589 Berlin , Germany .
| | - Peter Laux
- German Federal Institute for Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Straße 8-10 , 10589 Berlin , Germany .
| | - Andreas Luch
- German Federal Institute for Risk Assessment (BfR) , Department of Chemical and Product Safety , Max-Dohrn-Straße 8-10 , 10589 Berlin , Germany .
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6
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Huang Z, Huang Y, Ma C, Ma X, Zhang X, Lin L, Zhao Z, Pan X, Wu C. Endotracheal Aerosolization Device for Laboratory Investigation of Pulmonary Delivery of Nanoparticle Suspensions: In Vitro and in Vivo Validation. Mol Pharm 2018; 15:5521-5533. [PMID: 30252486 DOI: 10.1021/acs.molpharmaceut.8b00668] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
The objective of this study was to perform the in vitro and in vivo validation of an endotracheal aerosolization (ETA) device (HRH MAG-4, HM). Solid lipid nanoparticle suspension (SLNS) formulations with particle sizes of approximately 120, 240, 360, and 480 nm were selected as model nanoparticle suspensions for the validation. The emission rate (ER) of the in vitro aerosolization and the influence of aerosolization on the physicochemical properties were investigated. A high ER of up to 90% was obtained, and no significant alterations in physicochemical properties were observed after the aerosolization. The pulmonary deposition of model drug budesonide in Sprague-Dawley rats was determined to be approximately 80%, which was satisfactory for pulmonary delivery. Additionally, a fluorescent probe with aggregation-caused quenching property was encapsulated in SLNS formulations for in vivo bioimaging, after excluding the effect of aerosolization on its fluorescence spectrum. It was verified that SLNS formulations were deposited in the lung region. The results demonstrated the feasibility and reliability of the HM device for ETA in laboratory investigation.
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Affiliation(s)
- Zhengwei Huang
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
| | - Ying Huang
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
| | - Cheng Ma
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
| | - Xiangyu Ma
- College of Pharmacy , The University of Texas at Austin , Austin , Texas 78712 , United States
| | - Xuejuan Zhang
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China.,Institute for Biomedical and Pharmaceutical Sciences , Guangdong University of Technology , Guangzhou 510006 , P.R. China
| | - Ling Lin
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
| | - Ziyu Zhao
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
| | - Xin Pan
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
| | - Chuanbin Wu
- School of Pharmaceutical Sciences , Sun Yat-Sen University , Guangzhou , 510006 Guangdong , P. R. China
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Lin CI, Tsai CH, Sun YL, Hsieh WY, Lin YC, Chen CY, Lin CS. Instillation of particulate matter 2.5 induced acute lung injury and attenuated the injury recovery in ACE2 knockout mice. Int J Biol Sci 2018; 14:253-265. [PMID: 29559844 PMCID: PMC5859472 DOI: 10.7150/ijbs.23489] [Citation(s) in RCA: 112] [Impact Index Per Article: 18.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2017] [Accepted: 01/09/2018] [Indexed: 01/22/2023] Open
Abstract
Inhaled particulate matter 2.5 (PM2.5) can cause lung injury by inducing serious inflammation in lung tissue. Renin-angiotensin system (RAS) is involved in the pathogenesis of inflammatory lung diseases and regulates inflammatory response. Angiotensin-converting enzyme II (ACE2), which is produced through the angiotensin-converting enzyme (ACE)/angiotensin II (Ang II) axis, protects against lung disease. However, few studies have focused on the relationships between PM2.5 and ACE2. Therefore, we aimed to explore the role of ACE2 in PM2.5-induced acute lung injury (ALI). An animal model of PM2.5-induced ALI was established with wild type (C57BL/6, WT) and ACE2 gene knockout (ACE2 KO) mice. The mice were exposed to PM2.5 through intratracheal instillation once a day for 3 days (6.25 mg/kg/day) and then sacrificed at 2 days and 5 days after PM2.5 instillation. The results show that resting respiratory rate (RRR), levels of inflammatory cytokines, ACE and MMPs in the lungs of WT and ACE2 KO mice were significantly increased at 2 days postinstillation. At 5 days postinstillation, the PM2.5-induced ALI significantly recovered in the WT mice, but only partially recovered in the ACE2 KO mice. The results hint that PM2.5 could induce severe ALI through pulmonary inflammation, and the repair after acute PM2.5 postinstillation could be attenuated in the absence of ACE2. Additionally, our results show that PM2.5-induced ALI is associated with signaling p-ERK1/2 and p-STAT3 pathways and ACE2 knockdown could increase pulmonary p-STAT3 and p-ERK1/2 levels in the PM2.5-induced ALI.
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Affiliation(s)
- Chung-I Lin
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan.,Bioresource Collection and Research Center, Food Industry Research and Development Institute, Hsinchu, Taiwan
| | - Chin-Hung Tsai
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan.,Division of Pulmonary Medicine, Department of Internal Medicine, Tungs' Taichung Metro Harbor Hospital, Taichung, Taiwan
| | - Yu-Ling Sun
- Aquatic Technology Laboratories, Agricultural Technology Research Institute, Hsinchu, Taiwan
| | - Wen-Yeh Hsieh
- Division of Chest Medicine, Department of Internal Medicine, Hsinchu Mackay Memorial Hospital, Hsinchu, Taiwan.,Department of Senior Citizen Service Management, Minghsin University of Science and Technology, Hsinchu, Taiwan
| | - Yi-Chang Lin
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
| | - Cheng-Yi Chen
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan.,Division of Nephrology, Department of Internal Medicine, Hsinchu Mackay Memorial Hospital, Hsinchu, Taiwan
| | - Chih-Sheng Lin
- Department of Biological Science and Technology, National Chiao Tung University, Hsinchu, Taiwan
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Fioni A, Selg E, Cenacchi V, Acevedo F, Brogin G, Gerde P, Puccini P. Investigation of Lung Pharmacokinetic of the Novel PDE4 Inhibitor CHF6001 in Preclinical Models: Evaluation of the PreciseInhale Technology. J Aerosol Med Pulm Drug Deliv 2017; 31:61-70. [PMID: 28768120 DOI: 10.1089/jamp.2017.1369] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/31/2023] Open
Abstract
BACKGROUND Preclinical evaluation of new chemical entities (NCEs) designed to be administered by inhalation route requires lung administration to rodents, especially in the discovery phase. Different administration methods have been used until now, but more efforts are required to obtain controlled and reproducible lung deposition when only small amounts of neat powder material are available. METHODS The PreciseInhale platform used in the present study enables well-controlled powder aerosol exposures with only small amounts of micronized neat material, providing data on inhalation pharmacokinetic (PK) of NCEs at a very early stage. The DustGun aerosol technology uses compressed air to generate a respirable aerosol from milligram-amounts of powder that is delivered to one animal at a time. The new methodology was used to investigate the inhalation PK and lung retention in the rat of the novel Chiesi PDE4 inhibitor CHF6001 in three exposure models of the PreciseInhale platform: nose-only, intratracheally intubated rat, and the isolated, ventilated, and perfused rat lung. Results were compared with data from two other pulmonary delivery systems commonly used in preclinical studies: liquid instillation and powder insufflation. RESULTS Administration of micronized CHF6001 using the PreciseInhale system yielded lung exposures in the same range as the other tested devices, but the reproducibility in lung deposition was improved. The initial amount of CHF6001 in lungs at the first sampling time point was close to the predetermined target dose. Tracheal deposition with PreciseInhale (0.36 ± 0.22 μg) was significantly less than with other tested delivery systems: PennCentury (23.7 ± 3.2 μg) and Airjet (25.6 ± 7.2 μg). CONCLUSIONS The PreciseInhale platform enabled the administration of CHF6001 powder with good accuracy and reproducibility, with low tracheal deposition. The new platform can be used at an early discovery stage to obtain inhalatory PK data for respirable aerosols of neat NCE powder without excipients and with minimal use of dry powder formulation work.
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Affiliation(s)
| | - Ewa Selg
- 2 Inhalation Sciences Sweden AB , Stockholm, Sweden
| | | | | | | | - Per Gerde
- 2 Inhalation Sciences Sweden AB , Stockholm, Sweden .,3 Division of Physiology, Institute of Environmental Medicine, Karolinska Institutet , Stockholm, Sweden
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