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Sun M, Zhang M, Di F, Bai W, Sun J, Zhang M, Sun J, Li M, Liang X. Polystyrene nanoplastics induced learning and memory impairments in mice by damaging the glymphatic system. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 284:116874. [PMID: 39153278 DOI: 10.1016/j.ecoenv.2024.116874] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/25/2024] [Revised: 08/02/2024] [Accepted: 08/09/2024] [Indexed: 08/19/2024]
Abstract
The excessive usage of nanoplastics (NPs) has posed a serious threat to the ecological environment and human health, which can enter the brain and then result in neurotoxicity. However, research on the neurotoxic effects of NPs based on different exposure routes and modifications of functional groups is lacking. In this study, the neurotoxicity induced by NPs was studied using polystyrene nanoplastics (PS-NPs) of different modifications (PS, PS-COOH, and PS-NH2). It was found that PS-NH2 through intranasal administration (INA) exposure route exhibited the greatest accumulation in the mice brain after exposure for 7 days. After the mice were exposed to PS-NH2 by INA means for 28 days, the exploratory ability and spatial learning ability were obviously damaged in a dose-dependent manner. Further analysis indicated that these damages induced by PS-NH2 were closely related to the decreased ability of glymphatic system to clear β-amyloid (Aβ) and phosphorylated Tau (P-Tau) proteins, which was ascribed to the loss of aquaporin-4 (AQP4) polarization in the astrocytic endfeet. Moreover, the loss of AQP4 polarization might be regulated by the NF-κB pathway. Our current study establishes the connection between the neurotoxicity induced by PS-NPs and the glymphatic system dysfunction for the first time, which will contribute to future research on the neurotoxicity of NPs.
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Affiliation(s)
- Meng Sun
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China; School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China
| | - Min Zhang
- Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China
| | - Fanglin Di
- Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China
| | - Weijie Bai
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China
| | - Jikui Sun
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China
| | - Mingkun Zhang
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China
| | - Jinlong Sun
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China
| | - Meng Li
- Department of Neurosurgery, The First Affiliated Hospital of Shandong First Medical University, Jinan, Shandong 250014, China.
| | - Xue Liang
- School of Public Health, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China; Medical Science and Technology Innovation Center, Shandong First Medical University and Shandong Academy of Medical Sciences, Jinan, Shandong 250117, China.
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2
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Anduni L, Molina H, Zazueta A, Cancino J, Ponce C, Chakoory O, Comtet-Marre S, Tapia CV, Peyret P, Gotteland M, Magne F. Optimization of lung tissue pre-treatment by bead homogenization for subsequent culturomics. Sci Rep 2024; 14:22724. [PMID: 39349927 PMCID: PMC11442450 DOI: 10.1038/s41598-024-69736-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Accepted: 08/08/2024] [Indexed: 10/04/2024] Open
Abstract
The discovery that the lung harbors a diverse microbiome, as revealed by next-generation sequencing, has significantly altered our understanding of respiratory health and disease. Despite the association between the lung microbiota and disease, the nature of their relationship remains poorly understood, and culture isolation of these microorganisms could help to determine their role in lung physiology. Current procedures for processing samples from the lower respiratory tract have been shown to affect the viability of microorganisms, so it is crucial to develop new methods to improve their survival. This study aimed to improve the isolation and characterization of lung microorganisms using a bead-beating homogenization method in a mouse model. Microsphere diameter and bead-beating time affected the survival of the microorganisms (E. coli, S. aureus and C. albicans). Using 2.3 mm diameter microspheres for 60 s of bead-beating promoted the survival of both bacteria and yeast strains. After intratracheal instillation of these microorganisms in mice, approximately 70% of the cells were recovered after the tissue homogenization. To assess the efficiency of the proposed method, the diversity of bacteria was compared between the homogenate and lung tissue samples. Ninety-one genera were detected in the lung tissue, and 63 in the homogenate. Bacterial genera detected in the homogenate represented 84% of the total abundance of the microbiota identified in the lung tissue. Taken together, these results demonstrate that the tissue homogenization process developed in this study recovered the majority of the microorganisms present in the lung. This study presents a bead-beating homogenization method for effective cultivation of lung tissue microorganisms, which may help to improve the understanding of host-microbe interactions in the lung.
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Affiliation(s)
- Lourdes Anduni
- Microbiology and Mycology Program, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Hector Molina
- Microbiology and Mycology Program, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Alejandra Zazueta
- Microbiology and Mycology Program, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Javiera Cancino
- Microbiology and Mycology Program, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Carolina Ponce
- Microbiology and Mycology Program, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Oshma Chakoory
- Université Clermont Auvergne, INRAE, MEDIS, Clermont-Ferrand, France
| | | | | | - Pierre Peyret
- Université Clermont Auvergne, INRAE, MEDIS, Clermont-Ferrand, France
| | - Martin Gotteland
- Department of Nutrition, Faculty of Medicine, University of Chile, Santiago, Chile
| | - Fabien Magne
- Microbiology and Mycology Program, ICBM, Faculty of Medicine, University of Chile, Santiago, Chile.
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Ritter K, Rissel R, Renz M, Ziebart A, Schäfer MKE, Kamuf J. Nebulized Lipopolysaccharide Causes Delayed Cortical Neuroinflammation in a Murine Model of Acute Lung Injury. Int J Mol Sci 2024; 25:10117. [PMID: 39337602 PMCID: PMC11432715 DOI: 10.3390/ijms251810117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2024] [Revised: 09/15/2024] [Accepted: 09/17/2024] [Indexed: 09/30/2024] Open
Abstract
Lung injury caused by respiratory infection is a major cause of hospitalization and mortality and a leading origin of sepsis. Sepsis-associated encephalopathy and delirium are frequent complications in patients with severe lung injury, yet the pathogenetic mechanisms remain unclear. Here, 70 female C57BL/6 mice were subjected to a single full-body-exposure with nebulized lipopolysaccharide (LPS). Neuromotor impairment was assessed repeatedly and brain, blood, and lung samples were analyzed at survival points of 24 h, 48 h, 72 h, and 96 h after exposure. qRT-PCR revealed increased mRNA-expression of TNFα and IL-1β 24 h and 48 h after LPS-exposure in the lung, concomitantly with increased amounts of proteins in bronchoalveolar lavage and interstitial lung edema. In the cerebral cortex, at 72 h and/or 96 h after LPS exposure, the inflammation- and activity-associated markers TLR4, GFAP, Gadd45b, c-Fos, and Arc were increased. Therefore, single exposure to nebulized LPS not only triggers an early inflammatory reaction in the lung but also induces a delayed neuroinflammatory response. The identified mechanisms provide new insights into the pathogenesis of sepsis-associated encephalopathy and might serve as targets for future therapeutic approaches.
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Affiliation(s)
- Katharina Ritter
- Department of Anesthesiology, University Medical Center of the Johannes-Gutenberg-University, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - René Rissel
- Department of Anesthesiology, University Medical Center of the Johannes-Gutenberg-University, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Miriam Renz
- Department of Anesthesiology, University Medical Center of the Johannes-Gutenberg-University, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Alexander Ziebart
- Department of Anesthesiology, University Medical Center of the Johannes-Gutenberg-University, Langenbeckstrasse 1, 55131 Mainz, Germany
| | - Michael K. E. Schäfer
- Department of Anesthesiology, University Medical Center of the Johannes-Gutenberg-University, Langenbeckstrasse 1, 55131 Mainz, Germany
- Research Center for Immunotherapy (FZI), Johannes-Gutenberg-University, 55131 Mainz, Germany
- Focus Program Translational Neurosciences (FTN), Johannes-Gutenberg-University, 55131 Mainz, Germany
| | - Jens Kamuf
- Department of Anesthesiology, University Medical Center of the Johannes-Gutenberg-University, Langenbeckstrasse 1, 55131 Mainz, Germany
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Mo Y, Zhang Y, Zhang Q. The pulmonary effects of nickel-containing nanoparticles: Cytotoxicity, genotoxicity, carcinogenicity, and their underlying mechanisms. ENVIRONMENTAL SCIENCE. NANO 2024; 11:1817-1846. [PMID: 38984270 PMCID: PMC11230653 DOI: 10.1039/d3en00929g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/11/2024]
Abstract
With the exponential growth of the nanotechnology field, the global nanotechnology market is on an upward track with fast-growing jobs. Nickel (Ni)-containing nanoparticles (NPs), an important class of transition metal nanoparticles, have been extensively used in industrial and biomedical fields due to their unique nanostructural, physical, and chemical properties. Millions of people have been/are going to be exposed to Ni-containing NPs in occupational and non-occupational settings. Therefore, there are increasing concerns over the hazardous effects of Ni-containing NPs on health and the environment. The respiratory tract is a major portal of entry for Ni-containing NPs; thus, the adverse effects of Ni-containing NPs on the respiratory system, especially the lungs, have been a focus of scientific study. This review summarized previous studies, published before December 1, 2023, on cytotoxic, genotoxic, and carcinogenic effects of Ni-containing NPs on humans, lung cells in vitro, and rodent lungs in vivo, and the potential underlying mechanisms were also included. In addition, whether these adverse effects were induced by NPs themselves or Ni ions released from the NPs was also discussed. The extra-pulmonary effects of Ni-containing NPs were briefly mentioned. This review will provide us with a comprehensive view of the pulmonary effects of Ni-containing NPs and their underlying mechanisms, which will shed light on our future studies, including the urgency and necessity to produce engineering Ni-containing NPs with controlled and reduced toxicity, and also provide the scientific basis for developing nanoparticle exposure limits and policies.
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Affiliation(s)
- Yiqun Mo
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, Louisville, KY, USA
| | - Yue Zhang
- Northwestern University Feinberg School of Medicine, Chicago, IL, 60611, USA
| | - Qunwei Zhang
- Department of Epidemiology and Population Health, School of Public Health and Information Sciences, University of Louisville, Louisville, KY, USA
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Seo Y, Qiu L, Magnen M, Conrad C, Moussavi-Harami SF, Looney MR, Cleary SJ. Optimizing anesthesia and delivery approaches for dosing into lungs of mice. Am J Physiol Lung Cell Mol Physiol 2023; 325:L262-L269. [PMID: 37401383 PMCID: PMC10625824 DOI: 10.1152/ajplung.00046.2023] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2023] [Revised: 06/06/2023] [Accepted: 06/28/2023] [Indexed: 07/05/2023] Open
Abstract
Microbes, toxins, therapeutics, and cells are often instilled into lungs of mice to model diseases and test experimental interventions. Consistent pulmonary delivery is critical for experimental power and reproducibility, but we observed variation in outcomes between handlers using different anesthetic approaches for intranasal dosing in mice. We therefore used a radiotracer to quantify lung delivery after intranasal dosing under inhalational (isoflurane) versus injectable (ketamine/xylazine) anesthesia in C57BL/6 mice. We found that ketamine/xylazine anesthesia resulted in delivery of a greater proportion (52 ± 9%) of an intranasal dose to lungs relative to isoflurane anesthesia (30 ± 15%). This difference in pulmonary dose delivery altered key outcomes in models of viral and bacterial pneumonia, with mice anesthetized with ketamine/xylazine for intranasal infection with influenza A virus or Pseudomonas aeruginosa developing more robust lung inflammation responses relative to control animals randomized to isoflurane anesthesia. Pulmonary dosing efficiency through oropharyngeal aspiration was not affected by anesthetic method and resulted in delivery of 63 ± 8% of dose to lungs, and a nonsurgical intratracheal dosing approach further increased lung delivery to 92 ± 6% of dose. The use of either of these more precise dosing methods yielded greater experimental power in the bacterial pneumonia model relative to intranasal infection. Both anesthetic approach and dosing route can impact pulmonary dosing efficiency. These factors affect experimental power and so should be considered when planning and reporting studies involving delivery of fluids to lungs of mice.NEW & NOTEWORTHY Many lung research studies involve dosing fluids into lungs of mice. In this study, the authors measure lung deposition using intranasal (i.n.), oropharyngeal aspiration (o.a.), and intratracheal (i.t.) dosing methods in mice. Anesthetic approach and administration route were found to affect pulmonary dosing efficiency. The authors demonstrate that refinements to dosing techniques can enable reductions in the number of animals needed for bacterial and viral pneumonia studies.
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Affiliation(s)
- Yurim Seo
- Department of Medicine, University of California, San Francisco, California, United States
| | - Longhui Qiu
- Department of Medicine, University of California, San Francisco, California, United States
| | - Mélia Magnen
- Department of Medicine, University of California, San Francisco, California, United States
| | - Catharina Conrad
- Department of Medicine, University of California, San Francisco, California, United States
| | | | - Mark R Looney
- Department of Medicine, University of California, San Francisco, California, United States
| | - Simon J Cleary
- Department of Medicine, University of California, San Francisco, California, United States
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Fini MA, Monks JA, Li M, Gerasimovskaya E, Paucek P, Wang K, Frid MG, Pugliese SC, Bratton D, Yu YR, Irwin D, Karin M, Wright RM, Stenmark KR. Macrophage Xanthine Oxidoreductase Links LPS Induced Lung Inflammatory Injury to NLRP3 Inflammasome Expression and Mitochondrial Respiration. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.07.21.550055. [PMID: 37502951 PMCID: PMC10370167 DOI: 10.1101/2023.07.21.550055] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 07/29/2023]
Abstract
Acute lung injury (ALI) and the acute respiratory distress syndrome (ARDS) remain poorly treated inflammatory lung disorders. Both reactive oxygen species (ROS) and macrophages are involved in the pathogenesis of ALI/ARDS. Xanthine oxidoreductase (XOR) is an ROS generator that plays a central role in the inflammation that contributes to ALI. To elucidate the role of macrophage-specific XOR in endotoxin induced ALI, we developed a conditional myeloid specific XOR knockout in mice. Myeloid specific ablation of XOR in LPS insufflated mice markedly attenuated lung injury demonstrating the essential role of XOR in this response. Macrophages from myeloid specific XOR knockout exhibited loss of inflammatory activation and increased expression of anti-inflammatory genes/proteins. Transcriptional profiling of whole lung tissue of LPS insufflated XOR fl/fl//LysM-Cre mice demonstrated an important role for XOR in expression and activation of the NLRP3 inflammasome and acquisition of a glycolytic phenotype by inflammatory macrophages. These results identify XOR as an unexpected link between macrophage redox status, mitochondrial respiration and inflammatory activation.
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7
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Hosseinnezhad-Lazarjani E, Doosti A, Sharifzadeh A. Novel csuC-DNA nanovaccine based on chitosan candidate vaccine against infection with Acinetobacter baumannii. Vaccine 2023; 41:2170-2183. [PMID: 36841724 DOI: 10.1016/j.vaccine.2023.02.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2022] [Revised: 02/10/2023] [Accepted: 02/13/2023] [Indexed: 02/27/2023]
Abstract
BACKGROUND Generating vaccines is a promising and effective method for stopping the spread of Acinetobacter baumannii (A. baumannii) infections that are becoming more and more drug-resistant (MDR). Developing a DNA vaccine and testing its efficacy and protective effects in BALB/c mice were the goals of this research. METHODS We examined the genomes of 35 different strains of A. baumannii using the Vaxign online program, and we selected outer membrane and secreted proteins as potential vaccine candidates. Next, the proteins' immunogenicity, antigenic features, physical and chemical characteristics, and B and MHCI/II cell epitope concentrations were assessed. The DNA vaccine was synthesized. Then, to generate CS-DNA nanoparticles, the DNA vaccine was e encapsulated by chitosan (CS) nanoparticles (NPs). BALB/c mice were used to assess the vaccine's immunogenicity and immunoprotective effectiveness. RESULTS CS-DNA NPs were nontoxic, positively charged (4.39 mV), and small (mean size of 285-350 nm) with ostensibly spherical shapes. It was possible to establish a continuously slow release profile and a high entrapment efficiency (78.12 %). CS-DNA vaccinated BALB/c mice elicited greater levels of csuC-specific IgG in plasma and IFN-γ in splenocyte lysate compared with non-encapsulated DNA vaccine. In addition, BALB/c mice immunized with CS-DNA nanovaccine showed decreased lung damage and bacterial loads in the lung and blood, as well as significant immunity (87.5 %) versus acute fatal intratracheal A. baumannii challenge. CONCLUSION In conclusion, acute fatal intratracheal A. baumannii exposure was prevented by CS-DNA NPs that induced specific IgG antibodies, Th1 cellular immunity, and other protective mechanisms. Our findings show that this nanovaccine is a promising contender for stopping the spread of A. baumannii infection.
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Affiliation(s)
| | - Abbas Doosti
- Biotechnology Research Center, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
| | - Ali Sharifzadeh
- Department of Microbiology, Faculty of Veterinary Medicine, Shahrekord Branch, Islamic Azad University, Shahrekord, Iran
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8
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Seo Y, Qiu L, Magnen M, Conrad C, Moussavi-Harami SF, Looney MR, Cleary SJ. Optimizing anesthesia and delivery approaches for dosing into lungs of mice. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.02.01.526706. [PMID: 36778478 PMCID: PMC9915691 DOI: 10.1101/2023.02.01.526706] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Microbes, toxins, therapeutics and cells are often instilled into lungs of mice to model diseases and test experimental interventions. Consistent pulmonary delivery is critical for experimental power and reproducibility, but we observed variation in outcomes between handlers using different anesthetic approaches for intranasal dosing into mice. We therefore used a radiotracer to quantify lung delivery after intranasal dosing under inhalational (isoflurane) versus injectable (ketamine/xylazine) anesthesia in C57BL/6 mice. We found that ketamine/xylazine anesthesia resulted in delivery of a greater proportion (52±9%) of an intranasal dose to lungs relative to isoflurane anesthesia (30±15%). This difference in pulmonary dose delivery altered key outcomes in a model of viral pneumonia, with mice anesthetized with ketamine/xylazine for intranasal infection with influenza A virus developing worse lung pathology and more consistently losing body weight relative to control animals randomized to isoflurane anesthesia. Pulmonary dosing efficiency through oropharyngeal aspiration was not affected by anesthetic method and resulted in delivery of 63±8% of dose to lungs, and a non-surgical intratracheal dosing approach further increased lung delivery to 92±6% of dose. We conclude that anesthetic approach and dosing route can impact pulmonary dosing efficiency. These factors should be considered when planning and reporting studies involving delivery of fluids to lungs of mice.
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Affiliation(s)
- Yurim Seo
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA
| | - Longhui Qiu
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA
| | - Mélia Magnen
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA
| | - Catharina Conrad
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA
| | - S. Farshid Moussavi-Harami
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA
| | - Mark R Looney
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA
| | - Simon J Cleary
- Department of Medicine, UCSF, Health Sciences East 1355A, 513 Parnassus Ave., San Francisco, CA, 94143, USA,Corresponding author: Simon J Cleary, PhD, , +1 415-476-9190
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Pelgrim CE, van Ark I, van Berkum RE, Schuitemaker-Borneman AM, Flier I, Leusink-Muis T, Janbazacyabar H, Diks MAP, Gosker HR, Kelders MCJM, Langen RCJ, Schols AMWJ, Hageman RJJ, Braber S, Garssen J, Folkerts G, van Helvoort A, Kraneveld AD. Effects of a nutritional intervention on impaired behavior and cognitive function in an emphysematous murine model of COPD with endotoxin-induced lung inflammation. Front Nutr 2022; 9:1010989. [PMID: 36466426 PMCID: PMC9714332 DOI: 10.3389/fnut.2022.1010989] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Accepted: 11/02/2022] [Indexed: 08/29/2023] Open
Abstract
One cluster of the extrapulmonary manifestations in chronic obstructive pulmonary disease (COPD) is related to the brain, which includes anxiety, depression and cognitive impairment. Brain-related comorbidities are related to worsening of symptoms and increased mortality in COPD patients. In this study, a murine model of COPD was used to examine the effects of emphysema and repetitive pulmonary inflammatory events on systemic inflammatory outcomes and brain function. In addition, the effect of a dietary intervention on brain-related parameters was assessed. Adult male C57Bl/6J mice were exposed to elastase or vehicle intratracheally (i.t.) once a week on three consecutive weeks. Two weeks after the final administration, mice were i.t. exposed to lipopolysaccharide (LPS) or vehicle for three times with a 10 day interval. A dietary intervention enriched with omega-3 PUFAs, prebiotic fibers, tryptophan and vitamin D was administered from the first LPS exposure onward. Behavior and cognitive function, the degree of emphysema and both pulmonary and systemic inflammation as well as blood-brain barrier (BBB) integrity and neuroinflammation in the brain were assessed. A lower score in the cognitive test was observed in elastase-exposed mice. Mice exposed to elastase plus LPS showed less locomotion in the behavior test. The enriched diet seemed to reduce anxiety-like behavior over time and cognitive impairments associated with the presented COPD model, without affecting locomotion. In addition, the enriched diet restored the disbalance in splenic T-helper 1 (Th1) and Th2 cells. There was a trend toward recovering elastase plus LPS-induced decreased expression of occludin in brain microvessels, a measure of BBB integrity, as well as improving expression levels of kynurenine pathway markers in the brain by the enriched diet. The findings of this study demonstrate brain-associated comorbidities - including cognitive and behavioral impairments - in this murine model for COPD. Although no changes in lung parameters were observed, exposure to the specific enriched diet in this model appeared to improve systemic immune disbalance, BBB integrity and derailed kynurenine pathway which may lead to reduction of anxiety-like behavior and improved cognition.
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Affiliation(s)
- Charlotte E. Pelgrim
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Ingrid van Ark
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Ronja E. van Berkum
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Anne M. Schuitemaker-Borneman
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Inge Flier
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Thea Leusink-Muis
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Hamed Janbazacyabar
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Mara A. P. Diks
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Harry R. Gosker
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
| | - Marco C. J. M. Kelders
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
| | - Ramon C. J. Langen
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
| | - Annemie M. W. J. Schols
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
| | | | - Saskia Braber
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Johan Garssen
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Gert Folkerts
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
| | - Ardy van Helvoort
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, Netherlands
- Danone Nutricia Research, Utrecht, Netherlands
| | - Aletta D. Kraneveld
- Division of Pharmacology, Faculty of Science, Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, Netherlands
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Zeng Y, Jin H, Wang J, Guo C, Chen W, Tan Y, Wang L, Zhou Z. An optimized method for intratracheal instillation in mice. J Pharmacol Toxicol Methods 2022; 118:107230. [DOI: 10.1016/j.vascn.2022.107230] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2022] [Revised: 10/12/2022] [Accepted: 10/26/2022] [Indexed: 11/07/2022]
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11
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Pelgrim CE, Wang L, Peralta Marzal LN, Korver S, van Ark I, Leusink-Muis T, Braber S, Folkerts G, Garssen J, van Helvoort A, Kraneveld AD. Increased exploration and hyperlocomotion in a cigarette smoke and LPS-induced murine model of COPD: linking pulmonary and systemic inflammation with the brain. Am J Physiol Lung Cell Mol Physiol 2022; 323:L251-L265. [PMID: 35699308 DOI: 10.1152/ajplung.00485.2021] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 06/08/2022] [Accepted: 06/09/2022] [Indexed: 01/08/2023] Open
Abstract
Brain-related comorbidities are frequently observed in chronic obstructive pulmonary disease (COPD) and are related to increased disease progression and mortality. To date, it is unclear which mechanisms are involved in the development of brain-related problems in COPD. In this study, a cigarette smoke and lipopolysaccharide (LPS) exposure murine model was used to induce COPD-like features and assess the impact on brain and behavior. Mice were daily exposed to cigarette smoke for 72 days, except for days 42, 52, and 62, on which mice were intratracheally exposed to the bacterial trigger LPS. Emphysema and pulmonary inflammation as well as behavior and brain pathology were assessed. Cigarette smoke-exposed mice showed increased alveolar enlargement and numbers of macrophages and neutrophils in bronchoalveolar lavage. Cigarette smoke exposure resulted in lower body weight, which was accompanied by lower serum leptin levels, more time spent in the inner zone of the open field, and decreased claudin-5 and occludin protein expression levels in brain microvessels. Combined cigarette smoke and LPS exposure resulted in increased locomotion and elevated microglial activation in the hippocampus of the brain. These novel findings show that systemic inflammation observed after combined cigarette smoke and LPS exposure in this COPD model is associated with increased exploratory behavior. Findings suggest that neuroinflammation is present in the brain area involved in cognitive functioning and that blood-brain barrier integrity is compromised. These findings can contribute to our knowledge about possible processes involved in brain-related comorbidities in COPD, which is valuable for optimizing and developing therapy strategies.
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Affiliation(s)
- Charlotte E Pelgrim
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Lei Wang
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Lucía N Peralta Marzal
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Stephanie Korver
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Ingrid van Ark
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Thea Leusink-Muis
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Saskia Braber
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Gert Folkerts
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
| | - Johan Garssen
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
- Platform Immunology, Danone Nutricia Research, Utrecht, The Netherlands
| | - Ardy van Helvoort
- Danone Nutricia Research, Utrecht, The Netherlands
- Department of Respiratory Medicine, NUTRIM School of Nutrition and Translational Research in Metabolism, Maastricht University Medical Centre+, Maastricht, The Netherlands
| | - Aletta D Kraneveld
- Division of Pharmacology, Utrecht Institute for Pharmaceutical Sciences, Faculty of Science, Utrecht University, Utrecht, The Netherlands
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