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Dymacek J, Snyder-Talkington BN, Porter DW, Mercer RR, Wolfarth MG, Castranova V, Qian Y, Guo NL. mRNA and miRNA regulatory networks reflective of multi-walled carbon nanotube-induced lung inflammatory and fibrotic pathologies in mice. Toxicol Sci 2014; 144:51-64. [PMID: 25527334 DOI: 10.1093/toxsci/kfu262] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Multi-walled carbon nanotubes (MWCNTs) are known for their transient inflammatory and progressive fibrotic pulmonary effects; however, the mechanisms underlying these pathologies are unknown. In this study, we used time-series microarray data of global lung mRNA and miRNA expression isolated from C57BL/6J mice exposed by pharyngeal aspiration to vehicle or 10, 20, 40, or 80 µg MWCNT at 1, 7, 28, or 56 days post-exposure to determine miRNA and mRNA regulatory networks that are potentially involved in MWCNT-induced inflammatory and fibrotic lung etiology. Using a non-negative matrix factorization method, we determined mRNAs and miRNAs with expression profiles associated with pathology patterns of MWCNT-induced inflammation (based on bronchoalveolar lavage score) and fibrosis (based on Sirius Red staining measured with quantitative morphometric analysis). Potential binding targets between pathology-related mRNAs and miRNAs were identified using Ingenuity Pathway Analysis and the miRTarBase, miRecords, and TargetScan databases. Using these experimentally validated and predicted binding targets, we were able to build molecular signaling networks that are potentially reflective of and play a role in MWCNT-induced lung inflammatory and fibrotic pathology. As understanding the regulatory networks between mRNAs and miRNAs in different disease states would be beneficial for understanding the complex mechanisms of pathogenesis, these identified genes and pathways may be useful for determining biomarkers of MWCNT-induced lung inflammation and fibrosis for early detection of disease.
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Affiliation(s)
- Julian Dymacek
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Brandi N Snyder-Talkington
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Dale W Porter
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Robert R Mercer
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Michael G Wolfarth
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Vincent Castranova
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Yong Qian
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
| | - Nancy L Guo
- *Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, West Virginia 26506-6070, Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, West Virginia 26505, Department of Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, West Virginia 26506 and Department of Occupational and Environmental Health Science, School of Public Health, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, West Virginia 26506-9300
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Snyder-Talkington BN, Dong C, Zhao X, Dymacek J, Porter DW, Wolfarth MG, Castranova V, Qian Y, Guo NL. Multi-walled carbon nanotube-induced gene expression in vitro: concordance with in vivo studies. Toxicology 2014; 328:66-74. [PMID: 25511174 DOI: 10.1016/j.tox.2014.12.012] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2014] [Revised: 12/08/2014] [Accepted: 12/11/2014] [Indexed: 11/26/2022]
Abstract
There is a current interest in reducing the in vivo toxicity testing of nanomaterials in animals by increasing toxicity testing using in vitro cellular assays; however, toxicological results are seldom concordant between in vivo and in vitro models. This study compared global multi-walled carbon nanotube (MWCNT)-induced gene expression from human lung epithelial and microvascular endothelial cells in monoculture and coculture with gene expression from mouse lungs exposed to MWCNT. Using a cutoff of 10% false discovery rate and 1.5 fold change, we determined that there were more concordant genes (gene expression both up- or downregulated in vivo and in vitro) expressed in both cell types in coculture than in monoculture. When reduced to only those genes involved in inflammation and fibrosis, known outcomes of in vivo MWCNT exposure, there were more disease-related concordant genes expressed in coculture than monoculture. Additionally, different cellular signaling pathways are activated in response to MWCNT dependent upon culturing conditions. As coculture gene expression better correlated with in vivo gene expression, we suggest that cellular cocultures may offer enhanced in vitro models for nanoparticle risk assessment and the reduction of in vivo toxicological testing.
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Affiliation(s)
- Brandi N Snyder-Talkington
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Chunlin Dong
- Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300, USA
| | - Xiangyi Zhao
- Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300, USA
| | - Julian Dymacek
- Lane Department of Computer Science and Electrical Engineering, West Virginia University, Morgantown, WV 26506-6070, USA
| | - Dale W Porter
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Michael G Wolfarth
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA
| | - Vincent Castranova
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA; Department of Basic Pharmaceutical Sciences, School of Pharmacy, West Virginia University, Morgantown, WV 26506, USA
| | - Yong Qian
- Pathology and Physiology Research Branch, Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown, WV 26505, USA.
| | - Nancy L Guo
- Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506-9300, USA.
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