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Xiao X, Lei Y, Yao T, Huang T, Yan P, Cao L, Cao Y. PM 10 exposure induces bronchial hyperresponsiveness by upreguating acetylcholine muscarinic 3 receptor. Toxicol Appl Pharmacol 2024; 490:117035. [PMID: 39019094 DOI: 10.1016/j.taap.2024.117035] [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: 05/01/2024] [Revised: 07/08/2024] [Accepted: 07/10/2024] [Indexed: 07/19/2024]
Abstract
Exposure to particulate matter (PM10) can induce respiratory diseases that are closely related to bronchial hyperresponsiveness. However, the involved mechanism remains to be fully elucidated. This study aimed to demonstrate the effects of PM10 on the acetylcholine muscarinic 3 receptor (CHRM3) expression and the role of the ERK1/2 pathway in rat bronchial smooth muscle. A whole-body PM10 exposure system was used to stimulate bronchial hyperresponsiveness in rats for 2 and 4 months, accompanied by MEK1/2 inhibitor U0126 injection. The whole-body plethysmography system and myography were used to detect the pulmonary and bronchoconstrictor function, respectively. The mRNA and protein levels were determined by Western blotting, qPCR, and immunofluorescence. Enzyme-linked immunosorbent assay was used to detect the inflammatory cytokines. Compared with the filtered air group, 4 months of PM10 exposure significantly increased CHRM3-mediated pulmonary function and bronchial constriction, elevated CHRM3 mRNA and protein expression levels on bronchial smooth muscle, then induced bronchial hyperreactivity. Additionally, 4 months of PM10 exposure caused an increase in ERK1/2 phosphorylation and increased the secretion of inflammatory factors in bronchoalveolar lavage fluid. Treatment with the MEK1/2 inhibitor, U0126 inhibited the PM10 exposure-induced phosphorylation of the ERK1/2 pathway, thereby reducing the PM10 exposure-induced upregulation of CHRM3 in bronchial smooth muscle and CHRM3-mediated bronchoconstriction. U0126 could rescue PM10 exposure-induced pathological changes in the bronchus. In conclusion, PM10 exposure can induce bronchial hyperresponsiveness in rats by upregulating CHRM3, and the ERK1/2 pathway may be involved in this process. These findings could reveal a potential therapeutic target for air pollution induced respiratory diseases.
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Affiliation(s)
- Xue Xiao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Yali Lei
- Shanghai Environmental Monitoring Center, Shanghai 200232, China
| | - Tong Yao
- Precision Medical Institute, the Second Affiliated Hospital of Xi'an Jiaotong University, 157 West 5th Road, 710004, China
| | - Tingting Huang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Pingping Yan
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi 710061, China
| | - Lei Cao
- Precision Medical Institute, the Second Affiliated Hospital of Xi'an Jiaotong University, 157 West 5th Road, 710004, China.
| | - Yongxiao Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi 710061, China.
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Impact of air pollution on ischemic heart disease: Evidence, mechanisms, clinical perspectives. Atherosclerosis 2023; 366:22-31. [PMID: 36696748 DOI: 10.1016/j.atherosclerosis.2023.01.013] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 12/23/2022] [Accepted: 01/17/2023] [Indexed: 01/22/2023]
Abstract
Ambient air pollution, and especially particulate matter (PM) air pollution <2.5 μm in diameter (PM2.5), has clearly emerged as an important yet often overlooked risk factor for atherosclerosis and ischemic heart disease (IHD). In this review, we examine the available evidence demonstrating how acute and chronic PM2.5 exposure clinically translates into a heightened coronary atherosclerotic burden and an increased risk of acute ischemic coronary events. Moreover, we provide insights into the pathophysiologic mechanisms underlying PM2.5-mediated atherosclerosis, focusing on the specific biological mechanism through which PM2.5 exerts its detrimental effects. Further, we discuss about the possible mechanisms that explain the recent findings reporting a strong association between severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection, increased PM2.5 exposure, and morbidity and mortality from IHD. We also address the possible mitigation strategies that should be implemented to reduce the impact of PM2.5 on cardiovascular morbidity and mortality, and underscoring the strong need of clinical trials demonstrating the efficacy of specific interventions (including both PM2.5 reduction and/or specific drugs) in reducing the incidence of IHD. Finally, we introduce the emerging concept of the exposome, highlighting the close relationship between PM2.5 and other environmental exposures (i.e.: traffic noise and climate change) in terms of common underlying pathophysiologic mechanisms and possible mitigation strategies.
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Popescu LL, Popescu RS, Catalina T. Indoor Particle's Pollution in Bucharest, Romania. TOXICS 2022; 10:757. [PMID: 36548590 PMCID: PMC9786567 DOI: 10.3390/toxics10120757] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/01/2022] [Accepted: 12/02/2022] [Indexed: 06/17/2023]
Abstract
Air pollution risk factor on human health was surpassed only by high blood pressure, tobacco use and poor diet. Total number of deaths due to air pollution worldwide was estimated to 6.67 million people in 2019. In the European Union, 97% of the urban population is exposed to levels of fine particulate matter above the latest guideline levels set by the World Health Organization. Air pollution accounts for 20% of newborn deaths worldwide, most related to complications of low birth weight and preterm birth. Low birth weight and preterm birth are responsible for 1.8 million deaths worldwide. Bucharest is the capital city of Romania and one of the most polluted cities in Europe, ranking in the 9th position out of 96 of the top cities from Europe and in the 4th position out of 32 of the top cities in Eastern Europe, data from June 2022. The aim of this study was to measure the real time level of indoor particulate pollution levels in different indoor environments from Bucharest, during the pandemic period. The PM2.5/PM10 ratio and its rate of change were also determined for the measured data. The PM2.5/PM10 ratio and its rate of change were also calculated based on the measurement data. The PM2.5/PM10 ratio showed an upward trend on weekends compared to weekdays, suggesting a relationship with outdoor PM where leisure activities and traffic infiltrated the indoors. The fluctuation range of the PM2.5/PM10 ratio was 0.44~0.95, and low measured values were detected on weekdays. Of the seasons, the proportion of particulate in autumn and its rate of change tended to be higher than in summer. It was suggested that outdoor air may have permeated the room. In addition, the relationship was considered, such as it is a holiday period, there are few rainy days, the concentration of coarse particles is high, and the number of residents in the city decreases. When it comes to indoor air quality, the higher this ratio, the more serious the air pollution. PM10 concentrations decreased by 29.1% in the absence of human activity and increased by 35.1% in the presence of humans. PM2.5 concentration decreased by 30.3% without human activity and increased by 3.1% with the presence of humans. Certain trends were suggested for the resumption of human activity and an increase in PM2.5 concentrations. The average relative difference between October 2021, a pandemic period, and October 2022, a post pandemic period, was 64% for PM10 and 47% for PM2.5. The pandemic period brought a significantly better indoor air quality from the particulate pollution point of view.
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Affiliation(s)
- Lelia Letitia Popescu
- Faculty of Building Services, Technical University of Civil Engineering, 021414 Bucharest, Romania
| | - Razvan Stefan Popescu
- Faculty of Building Services, Technical University of Civil Engineering, 021414 Bucharest, Romania
| | - Tiberiu Catalina
- Faculty of Building Services, Technical University of Civil Engineering, 021414 Bucharest, Romania
- National Institute for Research-Development in Construction, Urbanism and Sustainable Territorial Development—INCD URBAN-INCERC, 400524 Cluj-Napoca, Romania
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Wang Y, Zhang P, Wang T, Yao D, Shi Y, Liu J, Wang B, Wei H, Liu W, Xu CB, Wang C. DMSO-soluble smoking particles up-regulates the vascular endothelin receptors through AMPK-SIRT1 and MAPK pathways. Chem Biol Interact 2022; 368:110203. [DOI: 10.1016/j.cbi.2022.110203] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2022] [Revised: 09/15/2022] [Accepted: 09/26/2022] [Indexed: 11/28/2022]
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Li L, Su XL, Bai TT, Qin W, Li AH, Liu YX, Wang M, Wang JK, Xing L, Li HJ, He CX, Zhou X, Zhao D, Li PQ, Wu SP, Liu JL, Chen YL, Cao HL. New paeonol derivative C302 reduces hypertension in spontaneously hypertensive rats through endothelium-dependent and endothelium-independent vasodilation. Eur J Pharmacol 2022; 927:175057. [PMID: 35636525 DOI: 10.1016/j.ejphar.2022.175057] [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: 01/12/2022] [Revised: 05/07/2022] [Accepted: 05/20/2022] [Indexed: 11/25/2022]
Abstract
Hypertension is a major risk factor for cardiovascular disease and Chinese herb monomers could provide new structural skeletons for anti-hypertension new drug development. Paeonol is a Chinese herbal monomer extracted from Cortex moutan, exhibited some anti-hypertensive activity. The study focused on the structural optimization of paeonol to provide promising lead compounds for anti-hypertension new drug development. Herein, twelve new paeonol derivatives (PD) were designed and synthesized and their vasodilation activity was evaluated by in vitro vasodilation drug screening platform based on Myograph. Its anti-hypertension activity, PD-C302 (2-hydroxy-4-methoxyvalerophenone) as a representative with the optimal vasodilation activity, was determined by its response to blood pressure in spontaneously hypertensive rats (SHR) in vivo. Moreover, its molecular mechanism was probed by the vasodilation activity of rat superior mesenteric artery rings with or without endothelium pre-contracted by potassium chloride (KCl) or phenylephrine hydrochloride (PE). It was indicated that PD-C302 significantly reduced the blood pressure in SHR, which would involve in PD-C302-induced vasodilation. Furthermore, endothelium-dependent pathways and endothelium-independent pathways both contributed importantly to PD-C302-induced vasodilation at low concentration of PD-C302. Endothelium-independent pathways (vascular smooth muscle cell-mediated vasodilation), were mainly responsible for the PD-C302-induced vasodilation at high concentration of PD-C302, which involved in opening multiple K+ channels to restrain Ca2+ channels, and then triggered vasodilation to reduce blood pressure. PD-C302 has a simple structure and favorable anti-hypertensive activity in vivo, which could be a promising lead compound for anti-hypertension new drug development.
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Affiliation(s)
- Long Li
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Xing-Li Su
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Tian-Tian Bai
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Wei Qin
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Ai-Hong Li
- Shaanxi Key Laboratory of Chinese Herb and Natural Drug Development, Medicine Research Institute, Shaanxi Pharmaceutical Holding Group Co., LTD, Xi'an, Shaanxi, 710075, China
| | - Yang-Xin Liu
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Ming Wang
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Jiang-Kai Wang
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Lu Xing
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Hui-Jin Li
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Chun-Xia He
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Xin Zhou
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Dong Zhao
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Peng-Quan Li
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Shao-Ping Wu
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China
| | - Jian-Li Liu
- College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China.
| | - Yu-Long Chen
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China.
| | - Hui-Ling Cao
- Xi'an Key Laboratory of Basic and Translation of Cardiovascular Metabolic Disease, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, Shaanxi, 710021, China; College of Life Sciences, Northwest University, Xi'an, Shaanxi, 710069, China.
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Sun X, Zhang H, Qin Q, Zhang X, Hou Y, Chen D, Su X, Jia M, Chen Y. Inhibitors of the MAPK/ NF-κB pathway attenuate the upregulation of the ET B receptor mediated by high glucose in vascular smooth muscle cells. Peptides 2022; 150:170732. [PMID: 34971676 DOI: 10.1016/j.peptides.2021.170732] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2021] [Revised: 12/26/2021] [Accepted: 12/27/2021] [Indexed: 11/17/2022]
Abstract
BACKGROUND Increased vascular smooth muscle cell (VSMC) endothelin type B (ETB) receptor expression is involved in cardiovascular diseases. High glucose (HG) in diabetes is closely related to cardiovascular complications. Although diabetes upregulates VSMC endothelin subtype B (ETB) receptors, its mechanism is still unclear. Our aim is to investigate the mechanism of HG-induced ETB receptors in VSMCs. METHODS Rat superior mesenteric arteries (SMAs) without endothelium were cultured in medium without serum for 24 h. HG with or without mitogen-activated protein kinase (MAPK) signaling pathway inhibitors and downstream nuclear factor-kappaB (NF-κB) inhibitors was coincubated with SMAs. A sensitive myograph detected the contractile responses to sarafotoxin 6c. Western blotting and immunofluorescence staining were used to determine protein expression. RESULTS HG promoted the expression of VSMC ETB receptors in rat SMAs and enhanced the ETB receptor-induced contractile response. The results showed that HG increased vascular smooth muscle cell (VSMC) ETB receptor expression and ETB receptor-induced contractile responses in rat SMAs. Both extracellular signal-related kinase 1 and 2 (ERK1/2) inhibitors (U0126) and P38 inhibitors (SB203580) significantly inhibited HG-increased VSMC ETB receptors. However, a C-jun terminal kinase (p-JNK) inhibitor (SP600125) did not affect HG- upregulated VSMC ETB receptors. Further study showed that NF-κB using an IκB kinase inhibitor (wedelolactone) also significantly inhibited HG-increased VSMC ETB receptors. CONCLUSION In conclusion, HG upregulated the VSMC ETB receptor by activating the ERK1/2- or P38- NF-κB signaling pathway.
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Affiliation(s)
- Xia Sun
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China; School of Basic and Medical Sciences, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Hongmei Zhang
- The First Affiliated Hospital of Xi'an Medical University, Xi'an Medical University, Xi'an, Shaanxi, 710077, China
| | - Qiaohong Qin
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Xin Zhang
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Ying Hou
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Di Chen
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China; School of Basic and Medical Sciences, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Xingli Su
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China; School of Basic and Medical Sciences, Xi'an Medical University, Xi'an, Shaanxi, 710021, China
| | - Min Jia
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China.
| | - Yulong Chen
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, 710021, China.
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Zhang X, Zhang H, Yang X, Qin Q, Sun X, Hou Y, Chen D, Jia M, Su X, Chen Y. Angiotensin II upregulates endothelin receptors through the adenosine monophosphate-activated protein kinase/sirtuin 1 pathway in vascular smooth muscle cells. J Pharm Pharmacol 2021; 73:1652-1662. [PMID: 34570873 DOI: 10.1093/jpp/rgab137] [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: 05/23/2021] [Accepted: 08/26/2021] [Indexed: 11/13/2022]
Abstract
OBJECTIVES This study was designed to test our hypothesis that angiotensin II (Ang II) upregulates endothelin (ET) receptors in vascular smooth muscle cells (VSMCs). METHODS Rat superior mesenteric artery (SMA) without endothelium was cultured in serum-free medium for 24 h in the presence of Ang II with or without metformin or nicotinamide. In vivo, rats were implanted subcutaneously with a mini-osmotic pump infusing AngII (500 ng/kg/min) for 4 weeks. The level of protein expression was determined using Western blotting. The contractile response to ET receptor agonists was studied using sensitive myography. Caudal artery blood pressure (BP) was measured using non-invasive tail-cuff plethysmography. KEY FINDINGS The results showed that Ang II significantly increased ET receptors and decreased phosphorylated-adenosine monophosphate-activated protein kinase α (p-AMPKα) in SMA. Furthermore, metformin significantly inhibited Ang II-upregulated ET receptors and upregulated Ang II-decreased sirtuin 1 (Sirt1). However, this effect was reversed by nicotinamide. Moreover, the in-vivo results showed that metformin not only inhibited Ang II-induced upregulation of ET receptors but also recovered Ang II-decreased p-AMPKα and Sirt1. In addition, metformin significantly inhibited Ang II-elevated BP. However, the effect was reversed by nicotinamide, except for p-AMPKα. CONCLUSIONS Ang II upregulated ET receptors in VSMCs to elevate BP by inhibiting AMPK, thereby inhibiting Sirt1.
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Affiliation(s)
- Xin Zhang
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Hongmei Zhang
- The First Affiliated Hospital of Xi'an Medical University, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xinpu Yang
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Qiaohong Qin
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xia Sun
- School of Basic and Medical Sciences, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Ying Hou
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Di Chen
- School of Basic and Medical Sciences, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Min Jia
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Xingli Su
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
- School of Basic and Medical Sciences, Xi'an Medical University, Xi'an, Shaanxi, China
| | - Yulong Chen
- Institute of Basic and Translational Medicine, Shaanxi Key Laboratory of Ischemic Cardiovascular Disease, Shaanxi Key Laboratory of Brain Disorders, Xi'an Medical University, Xi'an, Shaanxi, China
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Liang S, Zhang J, Ning R, Du Z, Liu J, Batibawa JW, Duan J, Sun Z. The critical role of endothelial function in fine particulate matter-induced atherosclerosis. Part Fibre Toxicol 2020; 17:61. [PMID: 33276797 PMCID: PMC7716453 DOI: 10.1186/s12989-020-00391-x] [Citation(s) in RCA: 66] [Impact Index Per Article: 16.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2020] [Accepted: 11/17/2020] [Indexed: 12/21/2022] Open
Abstract
Ambient and indoor air pollution contributes annually to approximately seven million premature deaths. Air pollution is a complex mixture of gaseous and particulate materials. In particular, fine particulate matter (PM2.5) plays a major mortality risk factor particularly on cardiovascular diseases through mechanisms of atherosclerosis, thrombosis and inflammation. A review on the PM2.5-induced atherosclerosis is needed to better understand the involved mechanisms. In this review, we summarized epidemiology and animal studies of PM2.5-induced atherosclerosis. Vascular endothelial injury is a critical early predictor of atherosclerosis. The evidence of mechanisms of PM2.5-induced atherosclerosis supports effects on vascular function. Thus, we summarized the main mechanisms of PM2.5-triggered vascular endothelial injury, which mainly involved three aspects, including vascular endothelial permeability, vasomotor function and vascular reparative capacity. Then we reviewed the relationship between PM2.5-induced endothelial injury and atherosclerosis. PM2.5-induced endothelial injury associated with inflammation, pro-coagulation and lipid deposition. Although the evidence of PM2.5-induced atherosclerosis is undergoing continual refinement, the mechanisms of PM2.5-triggered atherosclerosis are still limited, especially indoor PM2.5. Subsequent efforts of researchers are needed to improve the understanding of PM2.5 and atherosclerosis. Preventing or avoiding PM2.5-induced endothelial damage may greatly reduce the occurrence and development of atherosclerosis.
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Affiliation(s)
- Shuang Liang
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Jingyi Zhang
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Ruihong Ning
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Zhou Du
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Jiangyan Liu
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Joe Werelagi Batibawa
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Junchao Duan
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
| | - Zhiwei Sun
- Department of Toxicology and Sanitary Chemistry, School of Public Health, Capital Medical University, Beijing, 100069 People’s Republic of China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069 People’s Republic of China
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Xiao X, Yao T, Du S, Zhang J, Huang T, Lei Y, Cao L, Shen Z, Cao Y. Age differences in the pulmonary and vascular pathophysiologic processes after long-term real-time exposure to particulate matter in rats. CHEMOSPHERE 2020; 261:127710. [PMID: 32721691 DOI: 10.1016/j.chemosphere.2020.127710] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2020] [Revised: 07/07/2020] [Accepted: 07/12/2020] [Indexed: 06/11/2023]
Abstract
Existing experimental data do not sufficiently explain which pathophysiologic processes are involved in different age of rats exposed to long-term particulate matter. This study explored the pulmonary and cardiovascular effects of long-term PM2.5 and PM10 exposure in juvenile, adult and senescent rats. Tail cuff plethysmography, whole-body plethysmographic system, myograph, enzyme-linked immunosorbent assay, and inductively coupled plasma-mass spectrometry were used to detect the blood pressure, lung function, endothelium-dependent relaxation, inflammatory cytokines and heavy metals, respectively. The exposure time was from November, 2017 to October, 2018, and the average concentrations of PM2.5 and PM10 were 78.7 and 128.2 μg/m3, respectively. Compared with the filtered air group, the body weight and survival rate in PM2.5 and PM10 exposure group were significantly decreased, and the survival rate of senescent exposed rats was only 30%. PM2.5 and PM10 exposure increased the blood pressure, elevated the levels of serum and bronchoalveolar lavage fluid inflammatory factors, and the senescent exposed rats showed an earlier rising trend in blood pressure and inflammatory factors than those of juvenile and adult exposed rats. Long-term PM2.5 and PM10 exposure could destroy intrapulmonary and small resistance arteries endothelial function, causing vasodilation disorders. PM2.5 and PM10 exposure caused particulate matter to accumulate in the lungs. Additionally, PM2.5 and PM10 exposure could also cause accumulation of cadmium (Cd) and lead in the liver, and chromium and Cd in the kidney. In conclusion, ambient PM2.5 and PM10 exposure induced particulate matter to accumulate in the body, caused severe pulmonary and vascular disorders, and demonstrated age-associated differences.
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Affiliation(s)
- Xue Xiao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Tong Yao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Shuaishuai Du
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Junxia Zhang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Tingting Huang
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China
| | - Yali Lei
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi, 710049, China
| | - Lei Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China.
| | - Zhenxing Shen
- Department of Environmental Science and Engineering, Xi'an Jiaotong University, 28 Xianning West Road, Xi'an, Shaanxi, 710049, China
| | - Yongxiao Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, 76 Yanta West Road, Xi'an, Shaanxi, 710061, China
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10
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Chronic real-time particulate matter exposure causes rat pulmonary arteriole hyperresponsiveness and remodeling: The role of ET BR-ERK1/2 signaling. Toxicol Appl Pharmacol 2020; 403:115154. [PMID: 32710959 DOI: 10.1016/j.taap.2020.115154] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 07/17/2020] [Accepted: 07/18/2020] [Indexed: 01/03/2023]
Abstract
Exposure to air pollution is associated with the incidence of respiratory diseases. The present study evaluated the pulmonary vascular system injury by chronic real-time particulate matter (PM10) exposure and investigated the underlying mechanisms. Rats were exposed to PM10 or filtered air for 2 to 4 months using a whole body exposure system, and intraperitoneally injected with the MEK1/2 inhibitor U0126. Right heart catheterization and myography were performed to detect lung function and pulmonary vascular reactivity, respectively. Western blotting, qRT-PCR, enzyme-linked immunosorbent assay and histological analyses were used to detect the effects and mechanisms by which PM10 exposure-induced pulmonary vascular dysfunction. Functional experiment results showed that PM10 exposure increased the pulmonary artery pressure of rats and caused endothelin B receptor (ETBR)-mediated pulmonary arteriole hyperreactivity. U0126 significantly rescued these pathological changes. PM10 exposure upregulated the contractile ETBR of pulmonary arteriolar smooth muscle, and damaged pulmonary artery endothelial cells to induce the release of more endothelin 1 (ET-1). The upregulated ETBR bound to increased ET-1 induced pulmonary arteriolar hyperresponsiveness and remodeling. U0126 inhibited the PM10 exposure-induced upregulation of ETBR in pulmonary arteriole, ETBR-mediated pulmonary arterial hyperresponsiveness and vascular remodeling. In conclusion, chronic real-time particulate matter exposure can activate the ERK1/2 signaling, thereby inducing the upregulation of contractile ETBR in pulmonary arteriole, which may be involved in pulmonary arteriole hyperresponsiveness and remodeling in rats. These findings provide new mechanistic evidence of PM10 exposure-induced respiratory diseases, and a new possible target for treatment.
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11
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Nwanaji-Enwerem JC, Bind MA, Dai L, Oulhote Y, Colicino E, Di Q, Just AC, Hou L, Vokonas P, Coull BA, Weisskopf MG, Baccarelli AA, Schwartz JD. Editor's Highlight: Modifying Role of Endothelial Function Gene Variants on the Association of Long-Term PM2.5 Exposure With Blood DNA Methylation Age: The VA Normative Aging Study. Toxicol Sci 2018; 158:116-126. [PMID: 28486674 DOI: 10.1093/toxsci/kfx077] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023] Open
Abstract
Recent studies have reported robust associations of long-term PM2.5 exposure with DNA methylation-based measures of aging; yet, the molecular implications of these relationships remain poorly understood. We evaluated if genetic variation in 3 biological pathways implicated in PM2.5-related disease-oxidative stress, endothelial function, and metal processing-could modify the effect of PM2.5 on DNAm-age, one prominent DNA methylation-based measure of biological age. This analysis was based on 552 individuals from the Normative Aging Study with at least one visit between 2000 and 2011 (n = 940 visits). A genetic-score approach was used to calculate aging-risk variant scores for endothelial function, oxidative stress, and metal processing pathways. One-year PM2.5 and PM2.5 component (sulfate and ammonium) levels at participants' addresses were estimated using the GEOS-chem transport model. Blood DNAm-age was calculated using CpG sites on the Illumina HumanMethylation450 BeadChip. In fully-adjusted linear mixed-effects models, the effects of sulfate on DNAm-age (in years) were greater in individuals with high aging-risk endothelial function variant scores when compared with individuals with low aging-risk endothelial function variant scores (Pinteraction = 0.0007; βHigh = 1.09, 95% CIHigh: 0.70, 1.48; βLow = 0.40, 95% CILow: 0.14, 0.67). Similar trends were observed in fully adjusted models of ammonium and total PM2.5 alone. No effect modification was observed by oxidative stress and metal processing variant scores. Secondary analyses revealed significant associations of serum endothelial markers, intercellular adhesion molecule-1 (β = 0.01, 95% CI: 0.002, 0.012) and vascular cell adhesion molecule-1 (β = 0.002, 95% CI: 0.0005, 0.0026), with DNAm-age. Our results add novel evidence that endothelial physiology may be important to DNAm-age relationships, but further research is required to establish their generalizability.
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Affiliation(s)
- Jamaji C Nwanaji-Enwerem
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Marie-Abele Bind
- Department of Statistics, Faculty of Arts and Sciences, Harvard University, Cambridge, Massachusetts
| | - Lingzhen Dai
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Youssef Oulhote
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Elena Colicino
- Department of Environmental Health Sciences, Columbia Mailman School of Public Health, New York, New York
| | - Qian Di
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Allan C Just
- Department of Environmental Medicine and Public Health, Icahn School of Medicine at Mount Sinai, New York, New York
| | - Lifang Hou
- Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois
| | - Pantel Vokonas
- Department of Medicine, Veterans Affairs Boston Healthcare System and the Boston University School of Medicine, VA Normative Aging Study, Boston, Massachusetts
| | - Brent A Coull
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Marc G Weisskopf
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
| | - Andrea A Baccarelli
- Department of Environmental Health Sciences, Columbia Mailman School of Public Health, New York, New York
| | - Joel D Schwartz
- Department of Environmental Health, Harvard T.H. Chan School of Public Health, Boston, Massachusetts
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12
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Cho CC, Hsieh WY, Tsai CH, Chen CY, Chang HF, Lin CS. In Vitro and In Vivo Experimental Studies of PM 2.5 on Disease Progression. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2018; 15:E1380. [PMID: 29966381 PMCID: PMC6068560 DOI: 10.3390/ijerph15071380] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 06/22/2018] [Accepted: 06/23/2018] [Indexed: 12/14/2022]
Abstract
Air pollution is a very critical issue worldwide, particularly in developing countries. Particulate matter (PM) is a type of air pollution that comprises a heterogeneous mixture of different particle sizes and chemical compositions. There are various sources of fine PM (PM2.5), and the components may also have different effects on people. The pathogenesis of PM2.5 in several diseases remains to be clarified. There is a long history of epidemiological research on PM2.5 in several diseases. Numerous studies show that PM2.5 can induce a variety of chronic diseases, such as respiratory system damage, cardiovascular dysfunction, and diabetes mellitus. However, the epidemiological evidence associated with potential mechanisms in the progression of diseases need to be proved precisely through in vitro and in vivo investigations. Suggested mechanisms of PM2.5 that lead to adverse effects and chronic diseases include increasing oxidative stress, inflammatory responses, and genotoxicity. The aim of this review is to provide a brief overview of in vitro and in vivo experimental studies of PM2.5 in the progression of various diseases from the last decade. The summarized research results could provide clear information about the mechanisms and progression of PM2.5-induced disease.
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Affiliation(s)
- Ching-Chang Cho
- Department of Biological Science and Technology, National Chiao Tung University, 75 Boai Street, Hsinchu 300, Taiwan.
| | - Wen-Yeh Hsieh
- Division of Chest Medicine, Department of Internal Medicine, Hsinchu Mackay Memorial Hospital, 690 Section 2, Guangfu Road, Hsinchu 300, Taiwan.
| | - Chin-Hung Tsai
- Department of Biological Science and Technology, National Chiao Tung University, 75 Boai Street, Hsinchu 300, Taiwan.
- Division of Pulmonary Medicine, Department of Internal Medicine, Tungs' Taichung Metro Harbor Hospital, 699 Section 8, Taiwan Blvd., Taichung 435, Taiwan.
| | - Cheng-Yi Chen
- Department of Biological Science and Technology, National Chiao Tung University, 75 Boai Street, Hsinchu 300, Taiwan.
- Division of Nephrology, Department of Internal Medicine, Hsinchu Mackay Memorial Hospital, 690 Section 2, Guangfu Road, Hsinchu 300, Taiwan.
| | - Hui-Fang Chang
- Department of Biological Science and Technology, National Chiao Tung University, 75 Boai Street, Hsinchu 300, Taiwan.
- Division of Endocrinology, Department of Internal Medicine, Hsinchu Mackay Memorial Hospital, 690 Section 2, Guangfu Road, Hsinchu 300, Taiwan.
| | - Chih-Sheng Lin
- Department of Biological Science and Technology, National Chiao Tung University, 75 Boai Street, Hsinchu 300, Taiwan.
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13
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Liu J, Ren L, Wei J, Zhang J, Zhu Y, Li X, Jing L, Duan J, Zhou X, Sun Z. Fine particle matter disrupts the blood-testis barrier by activating TGF-β3/p38 MAPK pathway and decreasing testosterone secretion in rat. ENVIRONMENTAL TOXICOLOGY 2018; 33:711-719. [PMID: 29673083 DOI: 10.1002/tox.22556] [Citation(s) in RCA: 45] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2017] [Revised: 03/08/2018] [Accepted: 03/17/2018] [Indexed: 06/08/2023]
Abstract
Fine particle matter (PM) is correlated with male reproductive dysfunction in animals and humans, but the underlying mechanisms remain unknown. To investigate the toxic mechanism of PM, 32 male Sprague-Dawley (SD) rats were exposed to saline or PM2.5 with the doses of 1.8, 5.4, and 16.2 mg/kg.b.w. via intratracheal instillation, respectively, one time every 3 days, in total times for 30 days. Sperm concentration, hormone level, the expressions of BTB-associated protein and the mitogen-activated protein kinase (MAPK) pathway, tumor necrosis factor α and transforming growth factor β3 levels were detected. The results showed a decrease in sperm number, testosterone and luteinizing hormone levels and altered ultrastructure of BTB in testis of rat after exposure to PM2.5 . The protein levels of N-Cadherin, Occludin, Claudin-11, and Connexin-43 were significantly decreased in the testes. TGF-β3 content in testes showed increase, with the p-p38/p38 MAPK ratio also increasing after PM2.5 exposure. These results demonstrate that PM2.5 restrained the expressions of BTB-associated proteins through activating TGF-β3/p38 MAPK pathway and decreasing testosterone secretion, and therefore lead to the damage of BTB resulting in the decrease of sperm quality, which might be the potential reasons for its negative effects on spermatogenesis and male reproduction.
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Affiliation(s)
- Jianhui Liu
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Lihua Ren
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- School of Nursing, Peking University, Beijing, 100191, China
| | - Jialiu Wei
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Jin Zhang
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Yupeng Zhu
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Xiangyang Li
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Li Jing
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Junchao Duan
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Xianqing Zhou
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
| | - Zhiwei Sun
- Department of Toxicology and Hygienic Chemistry, School of Public Health, Capital Medical University, Beijing, 100069, China
- Beijing Key Laboratory of Environmental Toxicology, Capital Medical University, Beijing, 100069, China
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14
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Zhao Y, Dang Z, Xu S, Chong S. Heat shock protein 47 effects on hepatic stellate cell-associated receptors in hepatic fibrosis of Schistosoma japonicum-infected mice. Biol Chem 2017; 398:1357-1366. [DOI: 10.1515/hsz-2017-0177] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2017] [Accepted: 08/04/2017] [Indexed: 12/16/2022]
Abstract
AbstractThe study aimed to explore the regulation of heat shock protein 47 (HSP47) on expressions of receptors associated with hepatic stellate cell (HSC) in liver fibrosis mouse models induced bySchistosoma japonicum(S. japonicum). Mouse fibroblasts (NIH/3T3) were transfected with HSP47 shRNA plasmid by lipofectamine transfection, and experimental fibrosis in HSCs was studied inS. japonicummouse models treated with HSP47 shRNAin vivo. HSP47 expression was assessed using Western blot and real-time PCR. Flow cytometry was adopted to determine the expression of cell membrane receptors. HSP47-shRNA could markedly down-regulate the expression of collagen (Col1a1 and Col3a1). The expressions of HSP47, endothelin receptor A (ETAR) and endothelin receptor B (ETBR) significantly increased in the liver tissue of infected mice. However, the expressions of ETAR and HSP47 and ETBR remarkably decreased after the administration of HSP47 shRNAin vitroandin vivo. ETAR and ETBR levels were found to be positively correlated with HSP47 expression. HSP47 might exert influence on liver fibrosis via the regulation of ETAR and ETBR.
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15
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Yang D, Ma M, Zhou W, Yang B, Xiao C. Inhibition of miR-32 activity promoted EMT induced by PM2.5 exposure through the modulation of the Smad1-mediated signaling pathways in lung cancer cells. CHEMOSPHERE 2017; 184:289-298. [PMID: 28601662 DOI: 10.1016/j.chemosphere.2017.05.152] [Citation(s) in RCA: 47] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/16/2017] [Revised: 05/21/2017] [Accepted: 05/27/2017] [Indexed: 05/20/2023]
Abstract
Epithelial mesenchymal transition (EMT) is a crucial morphological event during tumor progression. The present study reported that EMT could be triggered by airborne fine particulate matter (PM) with a mean diameter of less than 2.5 μm (PM2.5) in human lung cancer cells. We also aimed to elucidate the possible mechanisms of these processes. The results showed that treatment with PM2.5 promoted the activity of the SMAD family member 1 (Smad1)-mediated signaling pathway and downregulated the expression of the inhibitory Smad proteins Smad6 and Smad7 in lung cancer cells. Moreover, the knockdown of Smad1 suppressed the EMT process induced by PM2.5 exposure. Our data further revealed that miR-32 has a negative effect on PM2.5-induced EMT. The results showed that the expression level of miR-32 was significantly upregulated in the PM2.5-induced EMT process. The knockdown of miR-32 enhances the activity of the Smad1-mediated signaling pathway, which promotes the EMT process induced by PM2.5. Thus, these findings indicate that PM2.5 can induce the EMT process through the Smad1-mediated signaling pathway, and miR-32 may act as an EMT inhibitor in lung cancer cells.
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Affiliation(s)
- Dan Yang
- Key Laboratory of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China; Department of Pharmacology, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China
| | - Mingyue Ma
- Key Laboratory of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China; Department of Toxicology, School of Public Health, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China
| | - Weiqiang Zhou
- Key Laboratory of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China
| | - Biao Yang
- Key Laboratory of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China
| | - Chunling Xiao
- Key Laboratory of Environmental Pollution and Microecology of Liaoning Province, Shenyang Medical College, No. 146, North Huanghe Street, Huanggu District, Shenyang City, 110034, PR China.
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16
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Liu Y, Chen XL, Xu CB, Cao L, Lin J, Chen G, Li J. Tail vein injection of mmLDL upregulates mouse mesenteric artery ET B receptors via activation of the ERK1/2 pathway. Vascul Pharmacol 2017; 96-98:33-39. [PMID: 28797761 DOI: 10.1016/j.vph.2017.08.002] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2017] [Revised: 07/03/2017] [Accepted: 08/04/2017] [Indexed: 12/30/2022]
Abstract
Minimally modified low density lipoprotein (mmLDL) is a risk factor for cardiovascular disease. This study investigated the effect of mmLDL on mouse mesenteric artery endothelin type B (ETB) receptors and its molecular mechanism. Mice were injected with normal saline (NS group), mmLDL in the tail vein (mmLDL group), or with both mmLDL and an intraperitoneal injection of the ERK1/2 pathway-specific inhibitor U0126 (mmLDL+U0126 group). The dose-response curve of mesenteric artery contraction induced by sarafotoxin 6c (S6c), the ETB receptor agonist, was measured using a sensitive myograph system. ELISAs, RT-PCR and Western blot were used to determine the serum concentrations of mouse oxidized low density lipoprotein (oxLDL), intercellular adhesion molecule-1 (ICAM-1) and vascular cell adhesion molecule-1 (VCAM-1) as well as the expression of ETB receptors, ICAM-1, VCAM-1 and phosphorylated-extracellular signal-regulated kinase 1/2 (p-ERK1/2). The S6c-induced contraction dose-response curve was significantly enhanced by mmLDL treatment and showed a significantly higher Emax value than in the NS group (P<0.001), and the ETB receptor mRNA and protein expression in the vascular wall was significantly higher than in the NS group. The serum concentration and expression of ICAM-1 and VCAM-1 were also increased by mmLDL treatment, but intraperitoneal injection of U0126 inhibited these changes as well as the increase in p-ERK1/2 protein in the vessel wall caused by mmLDL. ICAM-1 and VCAM-1 serum concentrations were positively correlated with the S6c-induced maximum contraction of blood vessels. Increased in vivo levels of mmLDL increased the serum concentrations and expression of ICAM-1 and VCAM-1 by activating the ERK1/2 pathway, resulting in the expression of ETB receptors and the enhancement of contractile function in vascular smooth muscle. Understanding the effect of mmLDL on ETB receptors and its mechanism can provide ideas for cardiovascular disease prevention and treatment.
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Affiliation(s)
- Yang Liu
- Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hu'nan, China
| | - Xiao-Lan Chen
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China
| | - Cang-Bao Xu
- Institute of Basic and Translational Medicine, Xi'an Medical University, Xi'an, China
| | - Lei Cao
- Department of Pharmacology, School of Basic Medical Sciences, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Jie Lin
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China
| | - Gen Chen
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China
| | - Jie Li
- The First People's Hospital of Chenzhou, Xiangnan University, Chenzhou, Hu'nan, China; Institute of Pharmacy and Pharmacology, University of South China, Hengyang, Hu'nan, China.
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