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Zhang M, Liang C, Chen X, Cai Y, Cui L. Interplay between microglia and environmental risk factors in Alzheimer's disease. Neural Regen Res 2024; 19:1718-1727. [PMID: 38103237 PMCID: PMC10960290 DOI: 10.4103/1673-5374.389745] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2023] [Revised: 09/09/2023] [Accepted: 10/24/2023] [Indexed: 12/18/2023] Open
Abstract
Alzheimer's disease, among the most common neurodegenerative disorders, is characterized by progressive cognitive impairment. At present, the Alzheimer's disease main risk remains genetic risks, but major environmental factors are increasingly shown to impact Alzheimer's disease development and progression. Microglia, the most important brain immune cells, play a central role in Alzheimer's disease pathogenesis and are considered environmental and lifestyle "sensors." Factors like environmental pollution and modern lifestyles (e.g., chronic stress, poor dietary habits, sleep, and circadian rhythm disorders) can cause neuroinflammatory responses that lead to cognitive impairment via microglial functioning and phenotypic regulation. However, the specific mechanisms underlying interactions among these factors and microglia in Alzheimer's disease are unclear. Herein, we: discuss the biological effects of air pollution, chronic stress, gut microbiota, sleep patterns, physical exercise, cigarette smoking, and caffeine consumption on microglia; consider how unhealthy lifestyle factors influence individual susceptibility to Alzheimer's disease; and present the neuroprotective effects of a healthy lifestyle. Toward intervening and controlling these environmental risk factors at an early Alzheimer's disease stage, understanding the role of microglia in Alzheimer's disease development, and targeting strategies to target microglia, could be essential to future Alzheimer's disease treatments.
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Affiliation(s)
- Miaoping Zhang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong Province, China
| | - Chunmei Liang
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong Province, China
| | - Xiongjin Chen
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong Province, China
| | - Yujie Cai
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong Province, China
| | - Lili Cui
- Guangdong Key Laboratory of Age-Related Cardiac and Cerebral Diseases, Affiliated Hospital of Guangdong Medical University, Zhanjiang, Guangdong Province, China
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Alateeq R, Akhtar A, De Luca SN, Chan SMH, Vlahos R. Apocynin Prevents Cigarette Smoke-Induced Anxiety-Like Behavior and Preserves Microglial Profiles in Male Mice. Antioxidants (Basel) 2024; 13:855. [PMID: 39061923 PMCID: PMC11274253 DOI: 10.3390/antiox13070855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2024] [Revised: 07/12/2024] [Accepted: 07/12/2024] [Indexed: 07/28/2024] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is the third leading cause of death globally and is primarily caused by cigarette smoking (CS). Neurocognitive comorbidities such as anxiety and cognitive impairments are common among people with COPD. CS-induced lung inflammation and oxidative stress may "spill-over" into the systemic circulation, driving the onset of these comorbidities. We investigated whether a prophylactic treatment with the NADPH Oxidase 2 (NOX2) inhibitor, apocynin, could prevent CS-induced neurocognitive impairments. Adult male BALB/c mice were exposed to CS (9 cigarettes/day, 5 days/week) or room air (sham) for 8 weeks with co-administration of apocynin (5 mg/kg, intraperitoneal injection once daily) or vehicle (0.01% DMSO in saline). Following 7 weeks of CS exposure, mice underwent behavioral testing to assess recognition and spatial memory (novel object recognition and Y maze, respectively) and anxiety-like behaviors (open field and elevated plus maze). Mice were then euthanized, and blood, lungs, and brains were collected. Apocynin partially improved CS-induced lung neutrophilia and reversed systemic inflammation (C-reactive protein) and oxidative stress (malondialdehyde). Apocynin exerted an anxiolytic effect in CS-exposed mice, which was associated with restored microglial profiles within the amygdala and hippocampus. Thus, targeting oxidative stress using apocynin can alleviate anxiety-like behaviors and could represent a novel strategy for managing COPD-related anxiety disorders.
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Affiliation(s)
| | | | | | | | - Ross Vlahos
- Respiratory Research Group, Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Melbourne, VIC 3083, Australia; (R.A.); (A.A.); (S.N.D.L.)
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Goutal S, Tran T, Leroy C, Benhamouda N, Leterrier S, Saba W, Lafont B, Tartour É, Roelens M, Tournier N. Brain Glucose Metabolism as a Readout of the Central Nervous System Impact of Cigarette Smoke Exposure and Withdrawal and the Effects of NFL-101, as an Immune-Based Drug Candidate for Smoking Cessation Therapy. ACS Chem Neurosci 2024; 15:2520-2531. [PMID: 38875216 DOI: 10.1021/acschemneuro.4c00204] [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] [Indexed: 06/16/2024] Open
Abstract
Neuroimaging biomarkers are needed to investigate the impact of smoking withdrawal on brain function. NFL-101 is a denicotinized aqueous extract of tobacco leaves currently investigated as an immune-based smoking cessation therapy in humans. However, the immune response to NFL-101 and its ability to induce significant changes in brain function remain to be demonstrated. Brain glucose metabolism was investigated using [18F]fluoro-deoxy-glucose ([18F]FDG) PET imaging in a mouse model of cigarette smoke exposure (CSE, 4-week whole-body inhalation, twice daily). Compared with control animals, the relative uptake of [18F]FDG in CSE mice was decreased in the thalamus and brain stem (p < 0.001, n = 14 per group) and increased in the hippocampus, cortex, cerebellum, and olfactory bulb (p < 0.001). NFL-101 induced a humoral immune response (specific IgGs) in mice and activated human natural-killer lymphocytes in vitro. In CSE mice, but not in control mice, single-dose NFL-101 significantly increased [18F]FDG uptake in the thalamus (p < 0.01), thus restoring normal brain glucose metabolism after 2-day withdrawal in this nicotinic receptor-rich region. In tobacco research, [18F]FDG PET imaging provides a quantitative method to evaluate changes in the brain function associated with the withdrawal phase. This method also showed the CNS effects of NFL-101, with translational perspectives for future clinical evaluation in smokers.
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Affiliation(s)
- Sébastien Goutal
- CEA, CNRS, Inserm, BioMaps, Université Paris-Saclay, Orsay 91401, France
| | - Thi Tran
- Université Paris Cité, INSERM, PARCC, Paris 75015, France
- Department of Immunology, APHP, Hôpital Européen Georges Pompidou (HEGP), Hôpital Necker, Paris 75015,France
| | - Claire Leroy
- CEA, CNRS, Inserm, BioMaps, Université Paris-Saclay, Orsay 91401, France
| | - Nadine Benhamouda
- Université Paris Cité, INSERM, PARCC, Paris 75015, France
- Department of Immunology, APHP, Hôpital Européen Georges Pompidou (HEGP), Hôpital Necker, Paris 75015,France
| | - Sarah Leterrier
- CEA, CNRS, Inserm, BioMaps, Université Paris-Saclay, Orsay 91401, France
| | - Wadad Saba
- CEA, CNRS, Inserm, BioMaps, Université Paris-Saclay, Orsay 91401, France
| | | | - Éric Tartour
- Université Paris Cité, INSERM, PARCC, Paris 75015, France
- Department of Immunology, APHP, Hôpital Européen Georges Pompidou (HEGP), Hôpital Necker, Paris 75015,France
| | - Marie Roelens
- Université Paris Cité, INSERM, PARCC, Paris 75015, France
- Department of Immunology, APHP, Hôpital Européen Georges Pompidou (HEGP), Hôpital Necker, Paris 75015,France
| | - Nicolas Tournier
- CEA, CNRS, Inserm, BioMaps, Université Paris-Saclay, Orsay 91401, France
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Asthana S, Pandey SK, Gautam AS, Singh RK. MK2 inhibitor PF-3644022 shows protective effect in mouse microglial N9 cell line induced with cigarette smoke extract. Chem Biol Drug Des 2024; 104:e14592. [PMID: 39013758 DOI: 10.1111/cbdd.14592] [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: 04/21/2024] [Revised: 07/10/2024] [Accepted: 07/12/2024] [Indexed: 07/18/2024]
Abstract
Neuroinflammation is suggested as one of the potential links between CS-induced neuronal dysfunction. Cigarette smoke (CS) is one of the significant contributors of neuroinflammation, consequently leading to cognitive impairment and neurodegeneration. Microglia are the key resident macrophage cells in the brain with cell surface TLR4 receptor for responding to various stress signals. The CS constituents promote inflammation and oxidative stress in microglia leading to cytotoxicity through the TLR4-MK2 axis. However, the role of MK2 kinase in CS-induced microglial inflammation is not yet clearly understood. Therefore, we have used an MK2 inhibitor, PF-3644022 to study modulation of CS-extract induced oxidative and inflammatory signaling in a mouse microglial cell line, Furthermore, we also evaluated the enzymatic activity of acetylcholinesterase (AChE) on a direct exposure of enzyme with CS. CS exposure led to microglial cytotoxicity and enhanced the level of oxidative stress and proinflammatory cytokine release by microglial cells. The microglial cells pretreated with MK2 inhibitor, PF-3644022 significantly reduced the levels of oxidative stress markers, proinflammatory markers, and improved the level of antioxidant proteins in these cells. In addition, direct exposure of CS showed reduction in the enzymatic activity of AChE.
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Affiliation(s)
- Shikha Asthana
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli, Transit campus, Lucknow, Uttar Pradesh, India
| | - Shivam Kumar Pandey
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli, Transit campus, Lucknow, Uttar Pradesh, India
| | - Avtar Singh Gautam
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli, Transit campus, Lucknow, Uttar Pradesh, India
| | - Rakesh Kumar Singh
- Department of Pharmacology and Toxicology, National Institute of Pharmaceutical Education and Research, Raebareli, Transit campus, Lucknow, Uttar Pradesh, India
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van der Plas E, Darji H, Srivastava K, Schapiro M, Jeffe D, Perkins S, Howell R, Leisenring W, Armstrong GT, Oeffinger K, Krull K, Edelstein K, Hayashi RJ. Risk factors for neurocognitive impairment, emotional distress, and poor quality of life in survivors of pediatric rhabdomyosarcoma: A report from the Childhood Cancer Survivor Study. Cancer 2024; 130:2224-2236. [PMID: 38373075 PMCID: PMC11139574 DOI: 10.1002/cncr.35236] [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: 09/06/2023] [Revised: 01/11/2024] [Accepted: 01/12/2024] [Indexed: 02/21/2024]
Abstract
BACKGROUND Prevalence and risk of poor psychological outcomes following rhabdomyosarcoma (RMS) are not well-established. METHODS Participants in this cross-sectional, case-control study (n = 713 survivors, 42.5% female; mean [SD] age, 30.5 [6.6] years; n = 706 siblings, 57.2% female; mean age, 32.8,[7.9] years) completed measures of neurocognition, emotional distress, and health-related quality of life (HRQOL). Multivariable logistic regression models identified treatments, health behaviors, and chronic conditions associated with impairment. RESULTS Relative to siblings, more survivors reported neurocognitive impairment (task efficiency: 21.1% vs. 13.7%, emotional regulation: 16.7% vs. 11.0%, memory: 19.3% vs. 15.1%), elevated emotional distress (somatic distress: 12.9% vs. 4.7%, anxiety: 11.7% vs. 5.9%, depression: 22.8% vs. 16.9%) and poorer HRQOL (physical functioning: 11.1% vs. 2.8%, role functioning due to physical problems: 16.8% vs. 8.2%, pain: 17.5% vs. 10.0%, vitality: 22.3% vs. 13.8%, social functioning: 14.4% vs. 6.8%, emotional functioning: 17.1% vs. 10.6%). Cranial radiation increased risk for impaired task efficiency (odds ratio [OR], 2.30; 95% confidence interval [CI], 1.14-4.63), whereas chest and pelvic radiation predicted increased risk of physical functioning (OR, 2.68; 95% CI, 1.16-6.21 and OR, 3.44; 95% CI, 1.70-6.95, respectively). Smoking was associated with impaired task efficiency (OR, 2.06; 95% CI, 1.14-3.70), memory (OR, 2.23; 95% CI, 1.26-3.95), anxiety (OR, 2.71; 95% CI, 1.36-5.41) and depression (OR, 1.77; 95% CI, 1.01-3.11). Neurologic conditions increased risk of anxiety (OR, 2.30; 95% CI, 1.04-5.10), and hearing conditions increased risk of depression (OR, 1.79; 95% CI, 1.05-3.03). Neurologic and hearing conditions, respectively, were associated with impaired memory (OR, 2.44; 95% CI, 1.20-4.95 and OR, 1.87; 95% CI, 1.05-3.35) and poor health perception (OR, 2.62; 95% CI, 1.62-1.28 and OR, 2.33; 95% CI, 1.34-4.06). CONCLUSIONS RMS survivors are at significant risk for poor psychological outcomes. Advancing therapies for local control, smoking cessation, and managing chronic medical conditions may mitigate poor outcomes following RMS.
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Affiliation(s)
- Ellen van der Plas
- Arkansas Children’s Hospital, Department of Hematology/Oncology, Little Rock, AR, USA
- University of Arkansas for Medical Sciences, Department of Pediatrics, Little Rock, AR, USA
| | - Himani Darji
- Stanford University, Quantitative Sciences Unit, Department of Medicine, Stanford, CA, USA
- St. Jude Children’s Research Hospital, Biostatistics Department, Memphis, TN, USA
| | - Kumar Srivastava
- St. Jude Children’s Research Hospital, Biostatistics Department, Memphis, TN, USA
| | - Melissa Schapiro
- SSM Health Cardinal Glennon Children’s Hospital-St. Louis University, Department of Pediatrics, St Louis, MO, USA
| | - Donna Jeffe
- Washington University School of Medicine in St Louis, John T. Milliken Department of Medicine, St Louis, MO, USA
| | - Stephanie Perkins
- Washington University in St Louis, Department of Radiation Oncology, St Louis, MO, USA
| | - Rebecca Howell
- MD Anderson Cancer Center, Department of Radiation Physics, Houston, TX, USA
| | - Wendy Leisenring
- Fred Hutch Cancer Center, Clinical Research Division, Seattle, WA, USA
| | - Gregory T. Armstrong
- St. Jude Children’s Research Hospital, Epidemiology and Cancer Control, Memphis, TN, USA
| | | | - Kevin Krull
- St. Jude Children’s Research Hospital, Psychology & Biobehavioral Sciences, Memphis, TN, USA
| | - Kim Edelstein
- Princess Margaret Cancer Center, Department of Supportive Care, Toronto, Canada
| | - Robert J. Hayashi
- Washington University School of Medicine in St Louis, Department of Pediatrics, St Louis Childrens Hospital, Siteman Cancer Center, St Louis, MO, USA
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De Luca SN, Vlahos R. Targeting accelerated pulmonary ageing to treat chronic obstructive pulmonary disease-induced neuropathological comorbidities. Br J Pharmacol 2024; 181:3-20. [PMID: 37828646 PMCID: PMC10952708 DOI: 10.1111/bph.16263] [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: 07/26/2023] [Revised: 09/06/2023] [Accepted: 09/27/2023] [Indexed: 10/14/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a major incurable health burden, ranking as the third leading cause of death worldwide, mainly driven by cigarette smoking. COPD is characterised by persistent airway inflammation, lung function decline and premature ageing with the presence of pulmonary senescent cells. This review proposes that cellular senescence, a state of stable cell cycle arrest linked to ageing, induced by inflammation and oxidative stress in COPD, extends beyond the lungs and affects the systemic circulation. This pulmonary senescent profile will reach other organs via extracellular vesicles contributing to brain inflammation and damage, and increasing the risk of neurological comorbidities, such as stroke, cerebral small vessel disease and Alzheimer's disease. The review explores the role of cellular senescence in COPD-associated brain conditions and investigates the relationship between cellular senescence and circadian rhythm in COPD. Additionally, it discusses potential therapies, including senomorphic and senolytic treatments, as novel strategies to halt or improve the progression of COPD.
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Affiliation(s)
- Simone N. De Luca
- Centre for Respiratory Science and Health, School of Health & Biomedical SciencesRMIT UniversityMelbourneVictoriaAustralia
| | - Ross Vlahos
- Centre for Respiratory Science and Health, School of Health & Biomedical SciencesRMIT UniversityMelbourneVictoriaAustralia
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Sun Q, Wang H, Yang M, Xia H, Wu Y, Liu Q, Tang H. miR-153-3p via PIK3R1 Is Involved in Cigarette Smoke-Induced Neurotoxicity in the Brain. TOXICS 2023; 11:969. [PMID: 38133370 PMCID: PMC10747656 DOI: 10.3390/toxics11120969] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2023] [Revised: 11/22/2023] [Accepted: 11/28/2023] [Indexed: 12/23/2023]
Abstract
Cigarettes contain various chemicals that cause damage to nerve cells. Exposure to cigarette smoke (CS) causes insulin resistance (IR) in nerve cells. However, the mechanisms for a disorder in the cigarette-induced insulin signaling pathway and in neurotoxicity remain unclear. Therefore, we evaluated, by a series of pathology analyses and behavioral tests, the neurotoxic effects of chronic exposure to CS on C57BL/6 mice. Mice exposed to CS with more than 200 mg/m3 total particulate matter (TPM) exhibited memory deficits and cognitive impairment. Pathological staining of paraffin sections of mouse brain tissue revealed that CS-exposed mice had, in the brain, neuronal damage characterized by thinner pyramidal and granular cell layers and fewer neurons. Further, the exposure of SH-SY5Y cells to cigarette smoke extract (CSE) resulted in diminished insulin sensitivity and reduced glucose uptake in a dose-dependent fashion. The PI3K/GSK3 insulin signaling pathway is particularly relevant to neurotoxicity. microRNAs are involved in the PI3K/GSK3β/p-Tau pathway, and we found that cigarette exposure activates miR-153-3p, decreases PI3K regulatory subunits PIK3R1, and induces Tau hyperphosphorylation. Exposure to an miR-153 inhibitor or to a PI3K inhibitor alleviated the reduced insulin sensitivity caused by CS. Therefore, our results indicate that miR-153-3p, via PIK3R1, causes insulin resistance in the brain, and is involved in CS-induced neurotoxicity.
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Affiliation(s)
- Qian Sun
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (Q.S.); (M.Y.); (Y.W.)
- Key Laboratory of Modern Toxicology of Shenzhen, Shenzhen Medical Key Discipline of Health Toxicology (2020–2024), Shenzhen Center for Disease Control and Prevention, Shenzhen 518055, China
| | - Hailan Wang
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (H.W.); (H.X.)
| | - Mingxue Yang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (Q.S.); (M.Y.); (Y.W.)
| | - Haibo Xia
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (H.W.); (H.X.)
| | - Yao Wu
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (Q.S.); (M.Y.); (Y.W.)
| | - Qizhan Liu
- Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Nanjing Medical University, Nanjing 211166, China; (H.W.); (H.X.)
| | - Huanwen Tang
- Dongguan Key Laboratory of Environmental Medicine, School of Public Health, Guangdong Medical University, Dongguan 523808, China; (Q.S.); (M.Y.); (Y.W.)
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Lopes LA, Davenport C, Ramos Torres E, Chlebowski A, Mikami A, Raber J, Ruth Torres E, Kisby G. Neuropathological Examination of Mice Chronically Exposed to Secondhand Smoke. Mil Med 2023; 188:575-583. [PMID: 37948264 PMCID: PMC10637311 DOI: 10.1093/milmed/usad247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2022] [Revised: 02/28/2023] [Accepted: 06/27/2023] [Indexed: 11/12/2023] Open
Abstract
INTRODUCTION Around 21.6-35% of military personnel are smokers, while 12.26% of them have been regularly exposed to second-hand smoke (SHS). Second-hand smoke is considered an important risk factor for neurological diseases because it can induce oxidative stress, DNA damage, and disrupt DNA repair pathways. MATERIAL AND METHODS The brain of air (sham) or SHS exposed mice was cryoperserved, sectioned, and placed on a glass slide before immunoprobing them with antibodies to observe for oxidative DNA damage (8-oxoG), oxidative DNA repair (8-oxoguanine DNA glycosylase 1, Ogg1; apurinic/apyrimidinic endonuclease, Ape1), and inflammatory (glial fibrillary acidic protein) proteins. RESULTS Nissl staining of the prefrontal cortex (PFCTX) revealed the presence of dark, shrunken cells, hippocampal thinning, and the presence of activated astrocytes in SHS exposed mice. 8-oxoG staining was also more prominent in the PFCTX and hippocampus (HIPP) of SHS exposed mice. Ogg1 staining was reduced in the PFCTX and CA3 hippocampal neurons of SHS exposed mice, whereas it was more prominent in CA1 and CA4 hippocampal neurons. In contrast, Ape1 staining was more prominent in the PFCTX and the HIPP of SHS exposed mice. CONCLUSIONS These studies demonstrate that oxidative DNA damage (8-oxoG) was elevated and oxidative DNA repair (Ape1 and Ogg1) was altered in the brain of SHS exposed mice. In addition, activated astrocytes (i.e., glial fibrillary acidic protein) were also observed in the brain of SHS exposed mice. Therefore, SHS induces both oxidative DNA damage and repair as well as inflammation as possible underlying mechanism(s) of the cognitive decline and metabolic changes that were observed in chronically exposed mice. A better understanding of how chronic exposure to SHS induces cognitive dysfunction among military personnel could help improve the combat readiness of U.S. soldiers as well as reduce the financial burden on the DOD and veterans' families.
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Affiliation(s)
- Leilani A Lopes
- Department of Basic Medical Sciences, Western University of Health Sciences, College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, OR 97355, USA
| | - Conor Davenport
- Department of Basic Medical Sciences, Western University of Health Sciences, College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, OR 97355, USA
| | - Estefania Ramos Torres
- Department of Basic Medical Sciences, Western University of Health Sciences, College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, OR 97355, USA
| | - Anna Chlebowski
- Department of Basic Medical Sciences, Western University of Health Sciences, College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, OR 97355, USA
| | - Anna Mikami
- Department of Basic Medical Sciences, Western University of Health Sciences, College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, OR 97355, USA
| | - Jacob Raber
- Department of Neurology, Psychiatry, and Radiation Medicine, Division of Neuroscience Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA
| | - Eileen Ruth Torres
- Department of Neurology, Psychiatry, and Radiation Medicine, Division of Neuroscience Oregon National Primate Research Center, Oregon Health & Science University, Beaverton, OR 97006, USA
| | - Glen Kisby
- Department of Basic Medical Sciences, Western University of Health Sciences, College of Osteopathic Medicine of the Pacific-Northwest, Lebanon, OR 97355, USA
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Chan SMH, Brassington K, Almerdasi SA, Dobric A, De Luca SN, Coward‐Smith M, Wang H, Mou K, Akhtar A, Alateeq RA, Wang W, Seow HJ, Selemidis S, Bozinovski S, Vlahos R. Inhibition of oxidative stress by apocynin attenuated chronic obstructive pulmonary disease progression and vascular injury by cigarette smoke exposure. Br J Pharmacol 2023; 180:2018-2034. [PMID: 36908040 PMCID: PMC10953324 DOI: 10.1111/bph.16068] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 02/07/2023] [Accepted: 03/07/2023] [Indexed: 03/14/2023] Open
Abstract
BACKGROUND AND PURPOSE Cardiovascular disease affects up to half of the patients with chronic obstructive pulmonary disease (COPD), exerting deleterious impact on health outcomes and survivability. Vascular endothelial dysfunction marks the onset of cardiovascular disease. The present study examined the effect of a potent NADPH Oxidase (NOX) inhibitor and free-radical scavenger, apocynin, on COPD-related cardiovascular disease. EXPERIMENTAL APPROACH Male BALB/c mice were exposed to either room air (Sham) or cigarette smoke (CS) generated from 9 cigarettes·day-1 , 5 days a week for up to 24 weeks with or without apocynin treatment (5 mg·kg-1 ·day-1 , intraperitoneal injection). KEY RESULTS Eight-weeks of apocynin treatment reduced airway neutrophil infiltration (by 42%) and completely preserved endothelial function and endothelial nitric oxide synthase (eNOS) availability against the oxidative insults of cigarette smoke exposure. These preservative effects were maintained up until the 24-week time point. 24-week of apocynin treatment markedly reduced airway inflammation (reduced infiltration of macrophage, neutrophil and lymphocyte), lung function decline (hyperinflation) and prevented airway collagen deposition by cigarette smoke exposure. CONCLUSION AND IMPLICATIONS Limiting NOX activity may slow COPD progression and lower cardiovascular disease risk, particularly when signs of oxidative stress become evident.
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Affiliation(s)
- Stanley M. H. Chan
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Kurt Brassington
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Suleman Abdullah Almerdasi
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Aleksandar Dobric
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Simone N. De Luca
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Madison Coward‐Smith
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Hao Wang
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Kevin Mou
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Alina Akhtar
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Rana Abdullah Alateeq
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Wei Wang
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Huei Jiunn Seow
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Stavros Selemidis
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Steven Bozinovski
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
| | - Ross Vlahos
- Centre for Respiratory Science and Health, School of Health and Biomedical SciencesRMIT UniversityBundooraVictoria3083Australia
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Zhang H, Zhou H, Guo X, Zhang G, Xiao M, Wu S, Jin C, Yang J, Lu X. Cigarette smoke triggers calcium overload in mouse hippocampal neurons via the ΔFOSB-CACNA2D1 axis to impair cognitive performance. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 258:114996. [PMID: 37167740 DOI: 10.1016/j.ecoenv.2023.114996] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/05/2022] [Revised: 03/24/2023] [Accepted: 05/06/2023] [Indexed: 05/13/2023]
Abstract
A growing body of evidence shows that cigarette smoking impairs cognitive performance. The 'Calcium Hypothesis' theory of neuronopathies reveals a critical role of aberrant calcium signaling in compromised cognitive functions. However, the underlying implications of abnormalities in calcium signaling in the neurotoxicity induced by cigarette smoke (CS) have not yet been identified. CACNA2D1, an important auxiliary subunit involved in the composition of voltage-gated calcium channels (VGCCs), was reported to affect the calcium signaling in neurons by facilitating VGCCs-mediated Ca2+ influx. ΔFOSB, an alternatively-spliced product of the Fosb gene, is an activity-dependent transcription factor induced robustly in the brain in response to environmental stimuli such as CS. Interestingly, our preliminary bioinformatics analysis revealed a significant co-expression between ΔFOSB and CACNA2D1 in brain tissues of patients with neurodegenerative diseases characterized by progressive cognitive decline. Therefore, we hypothesized that the activation of the ΔFOSB-CACNA2D1 axis in response to CS exposure might cause dysregulation of calcium homeostasis in hippocampal neurons via VGCCs-mediated Ca2+ influx, thereby contributing to cognitive deficits. To this end, the present study established a CS-induced mouse model of hippocampus-dependent cognitive impairment, in which the activation of the ΔFOSB-CACNA2D1 axis accompanied by severe calcium overload was observed in the mouse hippocampal tissues. More importantly, ΔFOSB knockdown-/overexpression-mediated inactivation/activation of the ΔFOSB-CACNA2D1 axis interdicted/mimicked CS-induced dysregulation of calcium homeostasis followed by severe cellular damage in HT22 mouse hippocampal neurons. Mechanistically speaking, a further ChIP-qPCR assay confirmed the physical interaction between transcription factor ΔFOSB and the Cacna2d1 gene promoter, suggesting a direct transcriptional regulation of the Cacna2d1 gene by ΔFOSB. Overall, our current work aims to deliver a unique insight into the neurotoxic mechanisms induced by CS to explore potential targets for intervention.
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Affiliation(s)
- Hongchao Zhang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Huabin Zhou
- Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Xianhe Guo
- Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Guopei Zhang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Mingyang Xiao
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Shengwen Wu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Cuihong Jin
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Jinghua Yang
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China
| | - Xiaobo Lu
- Key Laboratory of Environmental Stress and Chronic Disease Control and Prevention, Ministry of Education, China Medical University, Shenyang 110122, People's Republic of China; Department of Toxicology, School of Public Health, China Medical University, Shenyang 110122, People's Republic of China.
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De Luca SN, Chan SMH, Dobric A, Wang H, Seow HJ, Brassington K, Mou K, Alateeq R, Akhtar A, Bozinovski S, Vlahos R. Cigarette smoke-induced pulmonary impairment is associated with social recognition memory impairments and alterations in microglial profiles within the suprachiasmatic nucleus of the hypothalamus. Brain Behav Immun 2023; 109:292-307. [PMID: 36775074 DOI: 10.1016/j.bbi.2023.02.005] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/04/2022] [Revised: 01/29/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
Chronic obstructive pulmonary disease (COPD) is a major, incurable respiratory condition that is primarily caused by cigarette smoking (CS). Neurocognitive disorders including cognitive dysfunction, anxiety and depression are highly prevalent in people with COPD. It is understood that increased lung inflammation and oxidative stress from CS exposure may 'spill over' into the systemic circulation to promote the onset of these extra-pulmonary comorbidities, and thus impacts the quality of life of people with COPD. The precise role of the 'spill-over' of inflammation and oxidative stress in the onset of COPD-related neurocognitive disorders are unclear. The present study investigated the impact of chronic CS exposure on anxiety-like behaviors and social recognition memory, with a particular focus on the role of the 'spill-over' of inflammation and oxidative stress from the lungs. Adult male BALB/c mice were exposed to either room air (sham) or CS (9 cigarettes per day, 5 days a week) for 24 weeks and were either daily co-administered with the NOX2 inhibitor, apocynin (5 mg/kg, in 0.01 % DMSO diluted in saline, i.p.) or vehicle (0.01 % DMSO in saline) one hour before the initial CS exposure of the day. After 23 weeks, mice underwent behavioral testing and physiological diurnal rhythms were assessed by monitoring diurnal regulation profiles. Lungs were collected and assessed for hallmark features of COPD. Consistent with its anti-inflammatory and oxidative stress properties, apocynin treatment partially lessened lung inflammation and lung function decline in CS mice. CS-exposed mice displayed marked anxiety-like behavior and impairments in social recognition memory compared to sham mice, which was prevented by apocynin treatment. Apocynin was unable to restore the decreased Bmal1-positive cells, key in cells in diurnal regulation, in the suprachiasmatic nucleus of the hypothalamus to that of sham levels. CS-exposed mice treated with apocynin was associated with a restoration of microglial area per cell and basal serum corticosterone. This data suggests that we were able to model the CS-induced social recognition memory impairments seen in humans with COPD. The preventative effects of apocynin on memory impairments may be via a microglial dependent mechanism.
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Affiliation(s)
- Simone N De Luca
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Stanley M H Chan
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Aleksandar Dobric
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Hao Wang
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Huei Jiunn Seow
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Kurt Brassington
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Kevin Mou
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Rana Alateeq
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Alina Akhtar
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Steven Bozinovski
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia
| | - Ross Vlahos
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, Victoria, Australia.
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Vlahos R, Wang H, Bozinovski S. Assessing Lung Inflammation and Pathology in Preclinical Models of Chronic Obstructive Pulmonary Disease. Methods Mol Biol 2023; 2691:97-109. [PMID: 37355540 DOI: 10.1007/978-1-0716-3331-1_8] [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] [Indexed: 06/26/2023]
Abstract
Chronic obstructive pulmonary disease (COPD) is an incurable disease that is a major cause of mortality and morbidity worldwide. Cigarette smoking is a major cause of COPD and triggers progressive airflow limitation, chronic lung inflammation, and irreversible lung damage and decline in lung function. COPD patients often experience various extrapulmonary comorbid diseases, including cardiovascular disease, skeletal muscle wasting, lung cancer, and cognitive decline which markedly impact on disease morbidity, progression, and mortality. People with COPD are also susceptible to respiratory infections which cause exacerbations of the underlying disease (AECOPD). The mechanisms and mediators underlying COPD and its comorbidities are poorly understood and current COPD therapy is relatively ineffective. We and others have used animal modelling systems to explore the mechanisms underlying COPD, AECOPD, and comorbidities of COPD with the goal of identifying novel therapeutic targets. Here we provide a preclinical model and protocols to assess the cellular, molecular, and pathological consequences of cigarette smoke exposure and the development of comorbidities of COPD.
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Affiliation(s)
- Ross Vlahos
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia.
| | - Hao Wang
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia
| | - Steven Bozinovski
- Centre for Respiratory Science and Health, School of Health and Biomedical Sciences, RMIT University, Bundoora, VIC, Australia
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