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Yong M, McCunney RJ. Evaluation of biological markers for the risk assessment of carbon black in epidemiological studies. Front Public Health 2024; 12:1367797. [PMID: 38689765 PMCID: PMC11060078 DOI: 10.3389/fpubh.2024.1367797] [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: 01/09/2024] [Accepted: 02/13/2024] [Indexed: 05/02/2024] Open
Abstract
Background/objectives Engineered nanomaterials (ENMs) have been suggested as being capable of promoting inflammation, a key component in the pathways associated with carcinogenesis, cardiovascular disease, and other conditions. As a result, the risk assessment of biological markers as early-stage indicators has the potential to improve translation from experimental toxicologic findings to identifying evidence in human studies. The study aims to review the possible early biological changes in workers exposed to carbon black (CB), followed by an evidentiary quality evaluation to determine the predictive value of the biological markers. Methods We conducted a literature search to identify epidemiological studies that assessed biological markers that were involved in the inflammatory process at early stages among workers with exposure to CB. We reviewed the studies with specific reference to the study design, statistical analyses, findings, and limitations. Results We identified five Chinese studies that investigated the potential impact of exposure to CB on inflammatory markers, bronchial wall thickening, genomic instability, and lung function impairment in CB production workers. Of the five Chinese studies, four were cross-sectional; another study reported results at two-time points over six years of follow-up. The authors of all five studies concluded positive relationships between exposure and the inflammatory cytokine profiles. The weak to very weak correlations between biomarkers and early-stage endpoints were reported. Conclusion Most inflammatory markers failed to satisfy the proposed evidentiary quality criteria. The significance of the results of the reviewed studies is limited by the cross-sectional study design, inconsistency in results, uncertain clinical relevance, and high occupational exposures. Based on this review, the risk assessment relying on inflammatory markers does not seem appropriate at this time. Nevertheless, the novel research warrants further exploration in assessing exposure to ENMs and corresponding potential health risks in occupational settings.
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Affiliation(s)
- Mei Yong
- MY EpiConsulting, Duesseldorf, Germany
| | - Robert J. McCunney
- Brigham and Women’s Hospital, Pulmonary Division, Harvard Medical School, Boston, MA, United States
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2
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Han D, Chen R, Kan H, Xu Y. The bio-distribution, clearance pathways, and toxicity mechanisms of ambient ultrafine particles. ECO-ENVIRONMENT & HEALTH (ONLINE) 2023; 2:95-106. [PMID: 38074989 PMCID: PMC10702920 DOI: 10.1016/j.eehl.2023.06.001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/25/2023] [Revised: 06/02/2023] [Accepted: 06/09/2023] [Indexed: 02/17/2024]
Abstract
Ambient particles severely threaten human health worldwide. Compared to larger particles, ultrafine particles (UFPs) are highly concentrated in ambient environments, have a larger specific surface area, and are retained for a longer time in the lung. Recent studies have found that they can be transported into various extra-pulmonary organs by crossing the air-blood barrier (ABB). Therefore, to understand the adverse effects of UFPs, it is crucial to thoroughly investigate their bio-distribution and clearance pathways in vivo after inhalation, as well as their toxicological mechanisms. This review highlights emerging evidence on the bio-distribution of UFPs in pulmonary and extra-pulmonary organs. It explores how UFPs penetrate the ABB, the blood-brain barrier (BBB), and the placental barrier (PB) and subsequently undergo clearance by the liver, kidney, or intestine. In addition, the potential underlying toxicological mechanisms of UFPs are summarized, providing fundamental insights into how UFPs induce adverse health effects.
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Affiliation(s)
- Dongyang Han
- Department of Environmental Health, School of Public Health, Fudan University, Shanghai 200032, China
| | - Renjie Chen
- Department of Environmental Health, School of Public Health, Fudan University, Shanghai 200032, China
| | - Haidong Kan
- Department of Environmental Health, School of Public Health, Fudan University, Shanghai 200032, China
| | - Yanyi Xu
- Department of Environmental Health, School of Public Health, Fudan University, Shanghai 200032, China
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3
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Zhang J, Li X, Cheng W, Li Y, Shi T, Jiang Y, Wang T, Wang H, Ren D, Zhang R, Zheng Y, Tang J. Chronic carbon black nanoparticles exposure increases lung cancer risk by affecting the cell cycle via circulatory inflammation. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2022; 305:119293. [PMID: 35421554 DOI: 10.1016/j.envpol.2022.119293] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2021] [Revised: 03/22/2022] [Accepted: 04/09/2022] [Indexed: 06/14/2023]
Abstract
As a widely used pure elemental carbon in colloidal particles, carbon black was listed as a group 2B carcinogen by IARC in 2010. The most available mechanism information about carbon black and carcinogenesis are from in vivo or in vitro studies. However, few studies concerned the nanoparticle's real-ambient exposure causing systemic change and further affecting the target organ. Herein, we used an ex vivo biosensor assay to investigate the transcriptome change of primary bronchial epithelial cells after treatment with the plasma from workers with long-term occupational carbon black exposure history. Based on ex vivo biosensor assay and transcriptome sequencing, we found the effect of internal systemic environment on epithelial cells after carbon black exposure was an inflammatory response, which mainly activates cell cycle-related pathways. After exposure to carbon black, the internal systemic environment could activate cancer-related pathways like epithelial-mesenchymal transition, hypoxia, TNF-α signaling via NF-κB. The hub genes in the carbon black group (CDC20 and PLK1) and their correlation with the systemic environment were uncovered by constructing the protein-protein interaction network. Inflammatory cytokines, especially CRP, were strongly correlated with the expression of CDC20 and PLK1. Besides, we also find a strong correlation between CDC20 and cytokinesis-block micronucleus endpoints in peripheral blood (rho = 0.591, P < 0.001). Our results show that long-term carbon black exposure might activate cell cycle-related pathways through circulating inflammation and increase the risk of cancer, while the oxidative stress caused by diesel exhaust particles are mainly related to PAHs exposure. After exposure to carbon black, the systemic environment could activate cancer-related pathways like diesel exhaust particles, increasing the risk of lung cancer. These attempts might provide a further understanding of the indirect effect of chronic occupational inhaled carbon black exposure on pulmonary carcinogenesis.
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Affiliation(s)
- Jianzhong Zhang
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Xin Li
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Wenting Cheng
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Yanting Li
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Teng Shi
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Yingying Jiang
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Tao Wang
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Hongmei Wang
- The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Dunqiang Ren
- The Affiliated Hospital of Qingdao University, Qingdao, 266000, China
| | - Rong Zhang
- School of Public Health, Hebei Medical Univeristy, Shijiazhuang, 050017, China
| | - Yuxin Zheng
- School of Public Health, Qingdao University, Qingdao, 266071, China
| | - Jinglong Tang
- School of Public Health, Qingdao University, Qingdao, 266071, China.
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4
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Wang T, Li J, Liang Y, Han W, Tang J, Cheng G, Zheng Y. Joint Effects of Carbon Black Exposure and Dietary Antioxidant Vitamin Intake on Small Airway Dysfunction. Front Nutr 2021; 8:716398. [PMID: 34760908 PMCID: PMC8572798 DOI: 10.3389/fnut.2021.716398] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Accepted: 09/24/2021] [Indexed: 11/21/2022] Open
Abstract
Objectives: Small airway dysfunction is considered as a precursor of chronic obstructive pulmonary disease and asthma. Our aim was to explore the joint effects of carbon black (CB) exposure and antioxidant vitamin intake on small airway dysfunction. Methods: A total of 70 CB packers (CBPs) and 107 non-CBPs were enrolled from an established cohort of CBP. Carbon content in airway macrophage (CCAM) quantified in induced sputum was used as a bio-effective dosimetry for exposure to CB. Logistic regression models were used to examine the odds ratios (ORs) of CB and dietary intake of antioxidant vitamins on small airway dysfunction, and the dose–response association. Results: The prevalence of small airway dysfunction was 32.9% (23 of 70) among CBPs, and 19.6% (21 of 107) among non-CBPs. For each 2.72-fold increase in CCAM, the OR of small airway dysfunction was 2.31 (95% CI = 1.20–4.44). For every 10 mg day−1 increase of the vitamin C intake, the risk of small airway dysfunction decreased by 6% (OR = 0.94, 95% CI = 0.88–0.99). Compared to non-CB exposure and higher vitamin C intake, CB exposure and lower vitamin C intake (OR = 7.56, 95% CI = 1.80 to 31.81) were associated with an increased risk of small airway dysfunction. Conclusions: Chronic exposure to a high level of CB aerosol increased the risk of small airway dysfunction in CB baggers. Dietary intake of vitamin C might be a modifiable factor for preventing small airway dysfunction.
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Affiliation(s)
- Tao Wang
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, China
| | - Jianyu Li
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, China
| | - Yi Liang
- Laboratory of Molecular Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Centre for Translational Medicine, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Wei Han
- Department of Respiratory and Critical Care Medicine, School of Medicine, Qingdao Municipal Hospital, Qingdao University, Qingdao, China
| | - Jinglong Tang
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, China
| | - Guo Cheng
- Laboratory of Molecular Translational Medicine, Key Laboratory of Birth Defects and Related Diseases of Women and Children (Sichuan University), Centre for Translational Medicine, Ministry of Education, West China Second University Hospital, Sichuan University, Chengdu, China
| | - Yuxin Zheng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, China
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Cao X, Lin L, Sood A, Ma Q, Zhang X, Liu Y, Liu H, Li Y, Wang T, Tang J, Jiang M, Zhang R, Yu S, Yu Z, Zheng Y, Han W, Leng S. Small Airway Wall Thickening Assessed by Computerized Tomography Is Associated With Low Lung Function in Chinese Carbon Black Packers. Toxicol Sci 2021; 178:26-35. [PMID: 32818265 DOI: 10.1093/toxsci/kfaa134] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023] Open
Abstract
Nanoscale carbon black as virtually pure elemental carbon can deposit deep in the lungs and cause pulmonary injury. Airway remodeling assessed using computed tomography (CT) correlates well with spirometry in patients with obstructive lung diseases. Structural airway changes caused by carbon black exposure remain unknown. Wall and lumen areas of sixth and ninth generations of airways in 4 lobes were quantified using end-inhalation CT scans in 58 current carbon black packers (CBPs) and 95 non-CBPs. Carbon content in airway macrophage (CCAM) in sputum was quantified to assess the dose-response. Environmental monitoring and CCAM showed a much higher level of elemental carbon exposure in CBPs, which was associated with higher wall area and lower lumen area with no change in total airway area for either airway generation. This suggested small airway wall thickening is a major feature of airway remodeling in CBPs. When compared with wall or lumen areas, wall area percent (WA%) was not affected by subject characteristics or lobar location and had greater measurement reproducibility. The effect of carbon black exposure status on WA% did not differ by lobes. CCAM was associated with WA% in a dose-dependent manner. CBPs had lower FEV1 (forced expiratory volume in 1 s) than non-CBPs and mediation analysis identified that a large portion (41-72%) of the FEV1 reduction associated with carbon black exposure could be explained by WA%. Small airway wall thickening as a major imaging change detected by CT may underlie the pathology of lung function impairment caused by carbon black exposure.
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Affiliation(s)
- Xue Cao
- Department of Occupational and Environmental Health, School of Public Health
| | - Li Lin
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao 266021, China
| | - Akshay Sood
- Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, New Mexico 87131
| | - Qianli Ma
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao 266021, China
| | - Xiangyun Zhang
- State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environment and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yuansheng Liu
- Department of Occupational and Environmental Health, School of Public Health
| | - Hong Liu
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao 266021, China
| | - Yanting Li
- Department of Occupational and Environmental Health, School of Public Health
| | - Tao Wang
- Department of Occupational and Environmental Health, School of Public Health
| | - Jinglong Tang
- Department of Occupational and Environmental Health, School of Public Health
| | - Menghui Jiang
- Department of Occupational and Environmental Health, School of Public Health
| | - Rong Zhang
- Department of Toxicology, School of Public Health, Hebei Medical University, Shijiazhuang 050017, China
| | - Shanfa Yu
- Henan Institute of Occupational Medicine, Zhengzhou, Henan 450052, China
| | - Zhiqiang Yu
- State Key Laboratory of Organic Geochemistry, Guangdong Key Laboratory of Environment and Resources, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, Guangzhou 510640, China
| | - Yuxin Zheng
- Department of Occupational and Environmental Health, School of Public Health
| | - Wei Han
- Department of Respiratory and Critical Care Medicine, Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao 266021, China
| | - Shuguang Leng
- Department of Occupational and Environmental Health, School of Public Health.,Department of Internal Medicine, University of New Mexico School of Medicine, Albuquerque, New Mexico 87131.,Cancer Control and Population Sciences, University of New Mexico Comprehensive Cancer Center, Albuquerque, New Mexico 87131
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Wang Z, Xu M, Wang Y, Wang T, Wu N, Zheng W, Duan H. Air particulate matter pollution and circulating surfactant protein: A systemic review and meta-analysis. CHEMOSPHERE 2021; 272:129564. [PMID: 33476792 DOI: 10.1016/j.chemosphere.2021.129564] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Revised: 12/28/2020] [Accepted: 01/03/2021] [Indexed: 06/12/2023]
Abstract
OBJECTIVE Air particulate matter (PM) pollution is associated with the alterations in circulating pulmonary damage proteins. But there are not consistent results among the epidemiological studies. The aim of this study is to investigate the alteration of surfactant protein (SP) from PM exposure. METHODS We conducted a comprehensive meta-analysis by searching the databases of PubMed, Medline, EMBASE, Web of Science and CNKI before October 2020 which reported PM pollutants and surfactant protein in the population. The sources of heterogeneity were assessed by subgroup (smoking, particulate matter with different aerodynamic diameter, exposure duration) analysis. We also used the publication bias tests for the comprehensive assessment. RESULTS This meta-analysis consisted of 10 studies with 1985 subjects. The results showed that the combined standardized mean difference (SMD) value was 0.05, 95% confidence interval (CI) was -0.07 to 0.17 for serum SP-A and -0.81 (95% CI: -1.41 to -0.21) for circulating SP-D. Among smokers, the combined SMD value of SP-A were 0.29 (95% CI: 0.05 to 0.52). We did not find the correlation between publication year of SP-A and SP-D and study heterogeneity. CONCLUSIONS Circulating SP-D was significantly decreased by air particulate matter. Serum SP-A was significantly increased by PM exposure among smokers. Circulating surfactant protein may be considered as a biomarker for respiratory injury caused by air particulate matter.
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Affiliation(s)
- Zhenjie Wang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Mengmeng Xu
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yanhua Wang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Ting Wang
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Nan Wu
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Wenjing Zheng
- Office of Epidemiology, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Huawei Duan
- Key Laboratory of Chemical Safety and Health, National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China.
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7
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Tang J, Cheng W, Gao J, Li Y, Yao R, Rothman N, Lan Q, Campen MJ, Zheng Y, Leng S. Occupational exposure to carbon black nanoparticles increases inflammatory vascular disease risk: an implication of an ex vivo biosensor assay. Part Fibre Toxicol 2020; 17:47. [PMID: 32993720 PMCID: PMC7523398 DOI: 10.1186/s12989-020-00378-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2020] [Accepted: 09/04/2020] [Indexed: 11/10/2022] Open
Abstract
Background Among manufactured or engineered nanoparticles, carbon black (CB) has largest production worldwide and is also an occupational respiratory hazard commonly seen in rubber industry. Few studies have assessed the risk for cardiovascular disease in carbon black exposed populations. An endothelial biosensor assay was used to quantify the capacity of sera from 82 carbon black packers (CBP) and 106 non-CBPs to induce endothelial cell activation ex vivo. The mediation effect of circulatory proinflammatory factors on the association between carbon black exposure and endothelial cell activation was assessed and further validated using in vitro intervention experiments. Results The average elemental carbon level inside carbon black bagging facilities was 657.0 μg/m3, which was 164-fold higher than that seen in reference areas (4.0 μg/m3). A global index was extracted from mRNA expression of seven candidate biosensor genes using principal component analysis and used to quantify the magnitude of endothelial cell activation. This global index was found to be significantly altered in CBPs compared to non-CBPs (P < 0.0001), however this difference did not vary by smoking status (P = 0.74). Individual gene analyses identified that de novo expression of key adhesion molecules (e.g., ICAM and VCAM) and chemotactic factors (e.g., CCL2, CCL5, and CXCL8) responsible for the recruitment of leukocytes was dramatically induced in CBPs with CXCL8 showing the highest fold of induction (relative quantification = 9.1, P < 0.0001). The combination of mediation analyses and in vitro functional validation confirmed TNF-α, IL-1β, and IL-6 as important circulatory factors mediating the effects of carbon black exposure on endothelial cell activation responses. Conclusions Inflammatory mediators in sera from CBPs may bridge carbon black exposure and endothelial cell activation response assessed ex vivo. CBPs may have elevated risk for cardiovascular diseases when comorbidity exists. Our study may serve as a benchmark for understanding health effects of engineered carbon based nanoparticles with environmental and occupational health relevance.
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Affiliation(s)
- Jinglong Tang
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Wenting Cheng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Jinling Gao
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Yanting Li
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, China
| | - Ruyong Yao
- Department of Central Laboratory, Affiliated Hospital of Medical College of Qingdao University, Qingdao University, Qingdao, 266021, China
| | - Nathaniel Rothman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Qing Lan
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Matthew J Campen
- Department of Pharmaceutical Sciences, College of Pharmacy, University of New Mexico, Albuquerque, 87131, USA
| | - Yuxin Zheng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, China.
| | - Shuguang Leng
- Department of Occupational and Environmental Health, School of Public Health, Qingdao University, Qingdao, 266021, China. .,Department of Internal Medicine, School of Medicine, University of New Mexico, Albuquerque, NM, 87131, USA. .,Cancer Control and Population Sciences, University of New Mexico Comprehensive Cancer Center, Albuquerque, NM, 87131, USA.
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8
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Lin H, Fu G, Yu Q, Wang Z, Zuo Y, Shi Y, Zhang L, Gu Y, Qin L, Zhou T. Carbon black nanoparticles induce HDAC6-mediated inflammatory responses in 16HBE cells. Toxicol Ind Health 2020; 36:759-768. [PMID: 32783763 DOI: 10.1177/0748233720947214] [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] [Indexed: 11/16/2022]
Abstract
Long-term inhalation of carbon black nanoparticles (CBNPs) leads to pulmonary inflammatory diseases. Histone deacetylase 6 (HDAC6) has been identified as an important regulator in the development of inflammatory disorders. However, the direct involvement of HDAC6 in CBNPs-induced pulmonary inflammatory responses remains unclear. To explore whether HDAC6 participates in CBNPs-induced pulmonary inflammation, human bronchial epithelial cell line (16HBE cells) was transfected with HDAC6 small interference RNA (siRNA) and then exposed to CBNPs at concentrations of 0, 25, and 50 µg/ml for 24 h. Intracellular HDAC6 and intraflagellar transport protein 88 (IFT88) mRNA and protein were determined by real-time polymerase chain reaction and Western blot, respectively. The secretions of inflammatory cytokines including interleukin (IL)-8, tumor necrosis factor (TNF)-α, IL-6, and IL-1β were measured by enzyme-linked immunosorbent assay. CBNPs induced a significant increase in the expressions of IL-8 and IL-6, accompanied by a high level of intracellular HDAC6 mRNA when compared with a blank control group (p < 0.05). However, there were no significant changes in the levels of TNF-α secretion, intracellular HDAC6 and IFT88 protein induced by CBNPs (p > 0.05). The HDAC6 mRNA expression was significantly suppressed in HDAC6 siRNA-transfected cells (p < 0.05). The secretions of IL-8, TNF-α, and IL-6 were significantly less in HDAC6 siRNA-transfected cells than that in normal 16HBE cells with exposure to 25 or 50 µg/ml of CBNPs, but intracellular IFT88 mRNA expression was markedly increased in HDAC6 siRNA-transfected cells when compared with normal 16HBE cells exposed to 50 µg/ml of CBNPs (all p < 0.05). Downregulation of the HDAC6 gene inhibits CBNPs-induced inflammatory responses in bronchial epithelial cells, partially through regulating IFT88 expression. It is suggested that CBNPs may trigger inflammatory responses in bronchial epithelial cells by an HDAC6/IFT88-dependent pathway.
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Affiliation(s)
- Hui Lin
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Guoqing Fu
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Qimei Yu
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Zhenyu Wang
- Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Department of Basic Medicine, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Yao Zuo
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Yuqin Shi
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Ling Zhang
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Yingying Gu
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China
| | - Lingzhi Qin
- Institute of Pathology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, Hubei, China
| | - Ting Zhou
- Department of Occupational and Environmental Health, School of Public Health, Medical College, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Hubei Province Key Laboratory of Occupational Hazard Identification and Control, 481115Wuhan University of Science and Technology, Wuhan, Hubei, China.,Department of Physiology, Wayne State University, Detroit, MI, USA
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9
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Wang W, Wang Q, Zou Z, Zheng F, Zhang A. Human arsenic exposure and lung function impairment in coal-burning areas in Guizhou, China. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2020; 190:110174. [PMID: 31927192 DOI: 10.1016/j.ecoenv.2020.110174] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 12/01/2019] [Accepted: 01/02/2020] [Indexed: 06/10/2023]
Abstract
To evaluate the effect of coal-burning arsenic (As) exposure on lung function and the potential underlying mechanisms, a total of 217 As-exposed subjects and 75 reference subjects were recruited into this study. Hair arsenic (H-As), pulmonary function tests, and serum inflammatory markers CC16, SP-A, MMP-9, and TIMP-1 were evaluated. Residents from As-exposed areas showed higher H-As concentrations (median 0.25 μg/g) than subjects from the reference area (median 0.14 μg/g). Large reductions in lung function parameters were noted in the As-exposed group. A significant negative correlation was observed between H-As concentrations and lung function. Specifically, monotonic negative dose-response relationships were observed between H-As and FEV1(%), FEV1/FVC (%) and FEF75 (%) (all P < 0.05), while the associations between H-As and FVC (%), FEF25 (%), and FEF50 (%) were nonlinear (P for nonlinearity = 0.03, 0.001, 0.01, respectively). In addition, there was a direct positive relationship between H-As and the inflammatory response. Alterations in inflammatory biomarkers (CC16, SP-A, MMP-9, and MMP-9/TIMP-1) were significantly associated with As-induced lung function impairment. Thus, this population-based study revealed that As exposure has significant toxic effects on lung function and increased inflammation may occur during this toxic process. We provide scientific evidence for an As-induced alteration in inflammatory biomarkers and pulmonary damage in an As-exposed population. The results of this study can inform risk assessment and risk control processes in relation to human As exposure in coal-burning arsenicosis areas.
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Affiliation(s)
- Wenjuan Wang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, PR China
| | - Qingling Wang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, PR China
| | - Zhonglan Zou
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, PR China
| | - Fanyan Zheng
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, PR China
| | - Aihua Zhang
- The Key Laboratory of Environmental Pollution Monitoring and Disease Control, Ministry of Education, School of Public Health, Guizhou Medical University, Guiyang, 550025, Guizhou, PR China.
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Cheng W, Liu Y, Tang J, Duan H, Wei X, Zhang X, Yu S, Campen MJ, Han W, Rothman N, Belinsky SA, Lan Q, Zheng Y, Leng S. Carbon content in airway macrophages and genomic instability in Chinese carbon black packers. Arch Toxicol 2020; 94:761-771. [PMID: 32076763 DOI: 10.1007/s00204-020-02678-6] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2019] [Accepted: 02/11/2020] [Indexed: 01/15/2023]
Abstract
Carbon black (CB) particulates as virtually pure elemental carbon can deposit deep in the lungs of humans. International Agency for Research on Cancer classified CB as a Group 2B carcinogen due to inconclusive human evidence. A molecular epidemiological study was conducted in an established cohort of CB packers (CBP) to assess associations between CB exposure and genomic instability in peripheral lymphocytes using cytokinesis-block micronucleus assay (CBMN). Carbon content in airway macrophages (CCAM) was quantified as a bio-effective dosimeter for chronic CB exposure. Dose-response observed in CBPs was compared to that seen in workers exposed to diesel exhaust. The association between CB exposure status and CBMN endpoints was identified in 85 CBPs and 106 non-CBPs from a 2012 visit and replicated in 127 CBPs and 105 non-CBPs from a 2018 visit. The proportion of cytoplasm area occupied by carbon particles in airway macrophages was over fivefold higher in current CBPs compared to non-CBPs and was associated with CBMN endpoints in a dose-dependent manner. CB aerosol and diesel exhaust shared the same potency of inducing genomic instability in workers. Circulatory pro-inflammatory factors especially TNF-α was found to mediate associations between CB exposure and CBMN endpoints. In vitro functional validation supported the role of TNF-α in inducing genomic instability. An estimated range of lower limits of benchmark dose of 4.19-7.28% of CCAM was recommended for risk assessment. Chronic CB exposure increased genomic instability in human circulation and this provided novel evidence supporting its reclassification as a human carcinogen.
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Affiliation(s)
- Wenting Cheng
- School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Yuansheng Liu
- School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Jinglong Tang
- School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Huawei Duan
- National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Xiaoran Wei
- School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Xiao Zhang
- National Institute for Occupational Health and Poison Control, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Shanfa Yu
- Henan Institute of Occupational Medicine, Zhengzhou, Henan, China.,Henan Medical College, Zhengzhou, Henan, China
| | - Matthew J Campen
- College of Pharmacy, University of New Mexico, Albuquerque, NM, USA
| | - Wei Han
- Qingdao Municipal Hospital, School of Medicine, Qingdao University, Qingdao, China
| | - Nathaniel Rothman
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Steven A Belinsky
- Lung Cancer Program, Lovelace Respiratory Research Institute, Albuquerque, NM, USA
| | - Qing Lan
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Rockville, MD, USA
| | - Yuxin Zheng
- School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China
| | - Shuguang Leng
- School of Public Health, Qingdao University, Qingdao, 266021, Shandong, China.
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