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Liang S, Lu Z, Cai L, Zhu M, Zhou H, Zhang J. Multi-Omics analysis reveals molecular insights into the effects of acute ozone exposure on lung tissues of normal and obese male mice. ENVIRONMENT INTERNATIONAL 2024; 183:108436. [PMID: 38219541 DOI: 10.1016/j.envint.2024.108436] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 01/05/2024] [Accepted: 01/08/2024] [Indexed: 01/16/2024]
Abstract
Certain sub-groups, including men and obese individuals, are more susceptible to ozone (O3) exposure, but the underlying molecular mechanisms remain unclear. In this study, the male mice were divided into two dietary groups: one fed a high-fat diet (HFD), mimicking obesity conditions, and the other fed a normal diet (ND), then exposed to 0.5 ppm and 2 ppm O3 for 4 h per day over two days. The HFD mice exhibited significantly higher body weight and serum lipid biochemical indicators compared to the ND mice. Obese mice also exhibited more severe pulmonary inflammation and oxidative stress. Using a multi-omics approach including proteomics, metabolomics, and lipidomics, we observed that O3 exposure induced significant pulmonary molecular changes in both obese and normal mice, primarily arachidonic acid metabolism and lipid metabolism. Different molecular biomarker responses to acute O3 exposure were also observed between two dietary groups, with immune-related proteins impacted in obese mice and PPAR pathway-related proteins affected in normal mice. Furthermore, although not statistically significant, O3 exposure tended to aggravate HFD-induced disturbances in lung glycerophospholipid metabolism. Overall, this study provides valuable molecular insights into the responses of lung to O3 exposure and highlights the potential impact of O3 on obesity-induced metabolic changes.
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Affiliation(s)
- Shijia Liang
- State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Zhonghua Lu
- State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Lijing Cai
- State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Miao Zhu
- State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Haixia Zhou
- State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, School of Public Health, Xiamen University, Xiamen, Fujian, China
| | - Jie Zhang
- State Key Laboratory of Vaccines for Infectious Diseases, Xiang An Biomedicine Laboratory, State Key Laboratory of Molecular Vaccinology and Molecular Diagnostics, National Innovation Platform for Industry-Education Integration in Vaccine Research, School of Public Health, Xiamen University, Xiamen, Fujian, China.
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Kodavanti UP. Susceptibility Variations in Air Pollution Health Effects: Incorporating Neuroendocrine Activation. Toxicol Pathol 2019; 47:962-975. [PMID: 31594484 PMCID: PMC9353182 DOI: 10.1177/0192623319878402] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/03/2023]
Abstract
Diverse host factors/phenotypes may exacerbate or diminish biological responses induced by air pollutant exposure. We lack an understanding of biological indicators of environmental exposures that culminate in a physiological response versus those that lead to adversity. Variations in response phenotype might arise centrally and/or at the local tissue level. In addition to genetic differences, the current evidence supports the roles of preexisting cardiopulmonary diseases, diabetes, diet, adverse prenatal environments, neurobehavioral disorders, childhood infections, microbiome, sex, and psychosocial stressors in modifying the susceptibility to air pollutant exposures. Animal models of human diseases, obesity, nutritional inadequacies, and neurobehavioral conditions have been compared with healthy controls to understand the causes of variations in susceptibility. Although psychosocial stressors have been associated with increased susceptibility to air pollutant effects, the contribution of neuroendocrine stress pathways in mediating these effects is just emerging. The new findings of neuroendocrine activation leading to systemic metabolic and immunological effects of air pollutants, and the potential contribution to allostatic load, emphasize the consideration of these mechanisms into susceptibility. Variations in susceptibility to air pollution health effects are likely to underlie host genetic and physiological conditions in concert with disrupted neuroendocrine circuitry that alters physiological stability under the influence of stressors.
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Affiliation(s)
- Urmila P Kodavanti
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, US Environmental Protection Agency, Research Triangle Park, NC, USA
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Henriquez A, House J, Miller DB, Snow SJ, Fisher A, Ren H, Schladweiler MC, Ledbetter AD, Wright F, Kodavanti UP. Adrenal-derived stress hormones modulate ozone-induced lung injury and inflammation. Toxicol Appl Pharmacol 2017. [PMID: 28623178 DOI: 10.1016/j.taap.2017.06.009] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
Abstract
Ozone-induced systemic effects are modulated through activation of the neuro-hormonal stress response pathway. Adrenal demedullation (DEMED) or bilateral total adrenalectomy (ADREX) inhibits systemic and pulmonary effects of acute ozone exposure. To understand the influence of adrenal-derived stress hormones in mediating ozone-induced lung injury/inflammation, we assessed global gene expression (mRNA sequencing) and selected proteins in lung tissues from male Wistar-Kyoto rats that underwent DEMED, ADREX, or sham surgery (SHAM) prior to their exposure to air or ozone (1ppm), 4h/day for 1 or 2days. Ozone exposure significantly changed the expression of over 2300 genes in lungs of SHAM rats, and these changes were markedly reduced in DEMED and ADREX rats. SHAM surgery but not DEMED or ADREX resulted in activation of multiple ozone-responsive pathways, including glucocorticoid, acute phase response, NRF2, and PI3K-AKT. Predicted targets from sequencing data showed a similarity between transcriptional changes induced by ozone and adrenergic and steroidal modulation of effects in SHAM but not ADREX rats. Ozone-induced increases in lung Il6 in SHAM rats coincided with neutrophilic inflammation, but were diminished in DEMED and ADREX rats. Although ozone exposure in SHAM rats did not significantly alter mRNA expression of Ifnγ and Il-4, the IL-4 protein and ratio of IL-4 to IFNγ (IL-4/IFNγ) proteins increased suggesting a tendency for a Th2 response. This did not occur in ADREX and DEMED rats. We demonstrate that ozone-induced lung injury and neutrophilic inflammation require the presence of circulating epinephrine and corticosterone, which transcriptionally regulates signaling mechanisms involved in this response.
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Affiliation(s)
- Andres Henriquez
- Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - John House
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC, United States
| | - Desinia B Miller
- Curriculum in Toxicology, University of North Carolina at Chapel Hill, Chapel Hill, NC, United States
| | - Samantha J Snow
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Anna Fisher
- Research Cores Unit, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Hongzu Ren
- Research Cores Unit, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Mette C Schladweiler
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Allen D Ledbetter
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States
| | - Fred Wright
- Bioinformatics Research Center, North Carolina State University, Raleigh, NC, United States
| | - Urmila P Kodavanti
- Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency, Research Triangle Park, NC, United States.
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Dye JA, Costa DL, Kodavanti UP. Executive Summary: variation in susceptibility to ozone-induced health effects in rodent models of cardiometabolic disease. Inhal Toxicol 2016; 27 Suppl 1:105-15. [PMID: 26667335 DOI: 10.3109/08958378.2014.995388] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
Seven million premature deaths occur annually due to air pollution worldwide, of which ∼80% are attributed to exacerbation of cardiovascular disease (CVD), necessitating greater attention to understanding the causes of susceptibility to air pollution in this sector of population. We used rat models of CVD with or without obesity and compared them to healthy strains to examine the risk factors of ozone-induced lung injury and inflammation. We examined functional, biochemical and molecular changes in several organs to evaluate how physiological factors as well as compensatory antioxidant reserves modulate processes by which ozone injury is influenced by underlying disease. In this study, we highlight key findings of this series of reports. We show that underlying cardiopulmonary insufficiency in genetically predisposed rats appears to increase the effective ozone dose; thus dosimetry is one factor contributing to exacerbated ozone effects. We further show that antioxidant reserve in airway lining fluid modulates ozone-induced damage such that strains with the least antioxidant reserve incur the greatest injury. And finally, we show that the inflammatory response to ozone is governed by a cluster of genes involved in regulating cytokine release, trafficking of inflammatory cells and processes related to cellular apoptosis and growth. All such processes are influenced not only by ozone dosimetry and the lung antioxidant milieu but also by the strain-specific genetic factors. In using a comprehensive systems biology research approach, our data reveal key risk factors for--and strategies to reduce risk of--air pollution mortality among those with CVD.
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Affiliation(s)
- Janice A Dye
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory , Research Triangle Park , NC , USA and
| | - Daniel L Costa
- b National Program for Air Climate & Energy Research, Office of Research and Development, US Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Urmila P Kodavanti
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory , Research Triangle Park , NC , USA and
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Kodavanti UP, Ledbetter AD, Thomas RF, Richards JE, Ward WO, Schladweiler MC, Costa DL. Variability in ozone-induced pulmonary injury and inflammation in healthy and cardiovascular-compromised rat models. Inhal Toxicol 2016; 27 Suppl 1:39-53. [PMID: 26667330 DOI: 10.3109/08958378.2014.954169] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The molecular bases for variability in air pollutant-induced pulmonary injury due to underlying cardiovascular (CVD) and/or metabolic diseases are unknown. We hypothesized that healthy and genetic CVD-prone rat models will exhibit exacerbated response to acute ozone exposure dependent on the type and severity of disease. Healthy male 12-14-week-old Wistar Kyoto (WKY), Wistar (WS) and Sprague Dawley (SD); and CVD-compromised spontaneously hypertensive (SH), Fawn-Hooded hypertensive (FHH), stroke-prone spontaneously hypertensive (SHSP), obese spontaneously hypertensive heart failure (SHHF) and obese JCR (JCR) rats were exposed to 0.0, 0.25, 0.5, or 1.0 ppm ozone for 4 h; pulmonary injury and inflammation were analyzed immediately following (0-h) or 20-h later. Baseline bronchoalveolar lavage fluid (BALF) protein was higher in CVD strains except for FHH when compared to healthy. Ozone-induced increases in protein and inflammation were concentration-dependent within each strain but the degree of response varied from strain to strain and with time. Among healthy rats, SD were least affected. Among CVD strains, lean rats were more susceptible to protein leakage from ozone than obese rats. Ozone caused least neutrophilic inflammation in SH and SHHF while SHSP and FHH were most affected. BALF neutrophils and protein were poorly correlated when considering the entire dataset (r = 0.55). The baseline and ozone-induced increases in cytokine mRNA varied markedly between strains and did not correlate with inflammation. These data illustrate that the degree of ozone-induced lung injury/inflammation response is likely influenced by both genetic and physiological factors that govern the nature of cardiovascular compromise in CVD models.
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Affiliation(s)
| | | | | | | | - William O Ward
- b Research Cores Unit, National Health and Environmental Effects Research Laboratory , and
| | | | - Daniel L Costa
- c National Program for Air Climate and Energy Research, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
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Hatch GE, Crissman K, Schmid J, Richards JE, Ward WO, Schladweiler MC, Ledbetter AD, Kodavanti UP. Strain differences in antioxidants in rat models of cardiovascular disease exposed to ozone. Inhal Toxicol 2016; 27 Suppl 1:54-62. [PMID: 26667331 DOI: 10.3109/08958378.2014.954170] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/04/2023]
Abstract
We examined the hypothesis that antioxidant substances and enzymes in lung, heart and in bronchoalveolar lavage fluid (BALF) are altered in response to O3 in cardiovascular disease and/or metabolic syndrome (CVD)-prone rat models. CVD strains [spontaneously hypertensive (SH), SH stroke-prone (SHSP), SHHF/Mcc heart failure obese (SHHF), insulin-resistant JCR:LA-cp obese (JCR) and Fawn-Hooded hypertensive (FHH)] were compared with normal strains [Wistar, Sprague-Dawley (SD) and Wistar Kyoto (WKY)]. Total glutathione (GSH + GSSG or GSx), reduced ascorbate (AH2), uric acid (UA) and antioxidant enzymes were determined in lung, heart and BALF immediately (0 h) or 20-h post 4-h nose-only exposure to 0.0, 0.25, 0.5 and 1.0 ppm O3. Basal- and O3-induced antioxidant substances in tissues varied widely among strains. Wistar rats had a robust O3-induced increase in GSx and AH2 in the lung. Two CVD strains (JCR and SHHF) had high basal levels of AH2 and GSx in BALF as well as high basal lung UA. Across all strains, high BALF GSx was only observed when high BALF AH2 was present. CVD rats tended to respond less to O3 than normal. High-basal BALF AH2 levels were associated with decreased O3 toxicity. In summary, large differences were observed between both normal and CVD rat strains in low-molecular weight antioxidant concentrations in lung, BALF and heart tissue. Wistar (normal) and JCR and SHHF (CVD) rats appeared to stand out as peculiar in terms of basal- or O3-induced changes. Results elucidate interactions among antioxidants and air pollutants that could enhance understanding of cardiopulmonary disease.
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Affiliation(s)
- Gary E Hatch
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA and
| | - Kay Crissman
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA and
| | - Judy Schmid
- b Research Cores Unit , National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Judy E Richards
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA and
| | - William O Ward
- b Research Cores Unit , National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Mette C Schladweiler
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA and
| | - Allen D Ledbetter
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA and
| | - Urmila P Kodavanti
- a Environmental Public Health Division, National Health and Environmental Effects Research Laboratory, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA and
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Ward WO, Ledbetter AD, Schladweiler MC, Kodavanti UP. Lung transcriptional profiling: insights into the mechanisms of ozone-induced pulmonary injury in Wistar Kyoto rats. Inhal Toxicol 2016; 27 Suppl 1:80-92. [PMID: 26667333 DOI: 10.3109/08958378.2014.954172] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
Acute ozone-induced pulmonary injury and inflammation are well characterized in rats; however, mechanistic understanding of the pathways involved is limited. We hypothesized that acute exposure of healthy rats to ozone will cause transcriptional alterations, and comprehensive analysis of these changes will allow us to better understand the mechanism of pulmonary injury and inflammation. Male Wistar Kyoto rats (10-12 week) were exposed to air, or ozone (0.25, 0.5 or 1.0 ppm) for 4 h and pulmonary injury and inflammation were assessed at 0-h or 20-h (n = 8/group). Lung gene expression profiling was assessed at 0-h (air and 1.0 ppm ozone, n = 3-4/group). At 20-h bronchoalveolar lavage, fluid protein and neutrophils increased at 1 ppm ozone. Numerous genes involved in acute inflammatory response were up-regulated along with changes in genes involved in cell adhesion and migration, steroid metabolism, apoptosis, cell cycle control and cell growth. A number of NRF2 target genes were also induced after ozone exposure. Based on expression changes, Rela, SP1 and TP3-mediated signaling were identified to be mediating downstream changes. Remarkable changes in the processes of endocytosis provide the insight that ozone-induced lung injury and inflammation are likely initiated by changes in cell membrane components and receptors likely from oxidatively modified lung lining lipids and proteins. In conclusion, ozone-induced injury and inflammation are preceded by changes in gene targets for cell adhesion/migration, apoptosis, cell cycle control and growth regulated by Rela, SP1 and TP53, likely mediated by the process of endocytosis and altered steroid receptor signaling.
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Affiliation(s)
| | - Allen D Ledbetter
- b Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Mette C Schladweiler
- b Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
| | - Urmila P Kodavanti
- b Environmental Public Health Division , National Health and Environmental Effects Research Laboratory, Office of Research and Development, U.S. Environmental Protection Agency , Research Triangle Park , NC , USA
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