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Hunter R, Wilson T, Lucas S, Scieszka D, Bleske B, Ottens A, Ashley R, Pace C, Kanagy N, Campen M. Characterization of Mild Delayed Gestational Hypertension in Rats Following Ozone Exposure. Cardiovasc Toxicol 2024:10.1007/s12012-024-09887-w. [PMID: 38963633 DOI: 10.1007/s12012-024-09887-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2024] [Accepted: 06/27/2024] [Indexed: 07/05/2024]
Abstract
The contribution of air pollution-induced cardiopulmonary damage on the development of hypertensive disorders of pregnancy and other adverse outcomes of pregnancy has gained increased attention as epidemiological data continue to highlight spatiotemporal pregnancy trends related to air pollution exposure. However clinical mechanistic data surrounding gestational complications remain sparse, necessitating the need for the use of animal models to study these types of complications of pregnancy. The current study seeks to examine the real-time effects of mid-gestational ozone exposure on maternal blood pressure and body temperature through the use of radiotelemetry in a rat model. The exposure resulted in acute depression of heart rate and core body temperature as compared to control animals. Ozone-exposed animals also presented with a slight but significant increase in arterial blood pressure which was perpetuated until term. The data presented here illustrates the feasibility of murine models to assess cardiovascular complications caused by inhaled toxicants during the window of pregnancy.
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Affiliation(s)
- Russell Hunter
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, MSC09 5360, 1 University of New Mexico, Albuquerque, NM, 87131-0001, USA
| | - Thomas Wilson
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, MSC09 5360, 1 University of New Mexico, Albuquerque, NM, 87131-0001, USA
| | - Selita Lucas
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, MSC09 5360, 1 University of New Mexico, Albuquerque, NM, 87131-0001, USA
| | - David Scieszka
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, MSC09 5360, 1 University of New Mexico, Albuquerque, NM, 87131-0001, USA
| | - Barry Bleske
- Department of Pharmacy Practice and Administrative Sciences, University of New Mexico College of Pharmacy, Albuquerque, NM, 87131, USA
| | - Andrew Ottens
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA, 23298, USA
| | - Ryan Ashley
- New Mexico State University, Las Cruces, NM, 88003, USA
| | - Carolyn Pace
- Department of Cell Biology and Physiology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Nancy Kanagy
- Department of Cell Biology and Physiology, University of New Mexico School of Medicine, Albuquerque, NM, 87131, USA
| | - Matthew Campen
- Department of Pharmaceutical Sciences, University of New Mexico College of Pharmacy, MSC09 5360, 1 University of New Mexico, Albuquerque, NM, 87131-0001, USA.
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Hunter R, Wilson T, Lucas S, Scieszka D, Bleske B, Ottens A, Ashley R, Pace C, Kanagy N, Campen MJ. Characterization of Mild Delayed Gestational Hypertension in Rats Following Ozone Exposure. RESEARCH SQUARE 2024:rs.3.rs-3977101. [PMID: 38464279 PMCID: PMC10925442 DOI: 10.21203/rs.3.rs-3977101/v1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 03/12/2024]
Abstract
The contribution of air pollution induced cardio-pulmonary damage on the development of hypertensive disorders of pregnancy and other adverse outcomes of pregnancy has gained increased attention as epidemiological data continues to highlight spatiotemporal pregnancy trends related to air pollution exposure. However clinical mechanistic data surrounding gestational complications remains sparse, necessitating the need for the use of animal models to study these types of complications of pregnancy. The current study seeks to examine the real-time effects of mid-gestational ozone exposure on maternal blood pressure and body temperature through the use of radiotelemetry in a rat model. The exposure resulted in acute depression of heart rate and core body temperature as compared to control animals. Ozone exposed animals also presented with a slight but significant increase in arterial blood pressure which was perpetuated until term. The data presented here illustrates the feasibility of murine models to assess cardiovascular complications caused by inhaled toxicants during the window of pregnancy.
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Gabriel MF, Felgueiras F, Batista R, Ribeiro C, Ramos E, Mourão Z, de Oliveira Fernandes E. Indoor environmental quality in households of families with infant twins under 1 year of age living in Porto. ENVIRONMENTAL RESEARCH 2021; 198:110477. [PMID: 33197420 DOI: 10.1016/j.envres.2020.110477] [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: 09/09/2020] [Revised: 10/20/2020] [Accepted: 11/10/2020] [Indexed: 06/11/2023]
Abstract
Exposure to air pollution in early years can exacerbate the risk of noncommunicable diseases throughout childhood and the entire life course. This study aimed to assess temperature, relative humidity (RH), carbon dioxide (CO2) and monoxide (CO), particulate matter (PM2.5, PM10), ultrafine particles, nitrogen dioxide (NO2), ozone (O3), formaldehyde, acetaldehyde and volatile organic compounds (VOC) levels in the two rooms where infant twins spend more time at home (30 dwellings, Northern Portugal). Findings showed that, in general, the worst indoor environmental quality (IEQ) settings were found in bedrooms. In fact, although most of the bedrooms surveyed presented adequate comfort conditions in terms of temperature and RH, several children are sleeping in a bedroom with improper ventilation and/or with a significant degree of air pollution. In particular, mean concentrations higher than recommended limits were found for CO2, PM2.5, PM10 and total VOC. Additionally, terpenes and decamethylcyclopentasiloxane were identified as main components of emissions from indoor sources. Overall, findings revealed that factors related to behaviors of the occupants, namely related to a conscientious use of cleaning products, tobacco and other consumer products (air-fresheners, incenses/candles and insecticides) and promotion of ventilation are essential for the improvement of air quality in households and for the promotion of children's health.
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Affiliation(s)
- Marta Fonseca Gabriel
- INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, Campus da FEUP, Rua Dr. Roberto Frias 400, 4200-465, Porto, Portugal.
| | - Fátima Felgueiras
- INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, Campus da FEUP, Rua Dr. Roberto Frias 400, 4200-465, Porto, Portugal
| | - Raúl Batista
- INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, Campus da FEUP, Rua Dr. Roberto Frias 400, 4200-465, Porto, Portugal
| | - Cláudia Ribeiro
- EPIUnit, Institute of Public Health, University of Porto, Rua Das Taipas 135, 4050-600, Porto, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - Elisabete Ramos
- EPIUnit, Institute of Public Health, University of Porto, Rua Das Taipas 135, 4050-600, Porto, Portugal; Department of Clinical Epidemiology, Predictive Medicine and Public Health, University of Porto Medical School, Alameda Prof. Hernâni Monteiro, 4200-319, Porto, Portugal
| | - Zenaida Mourão
- INEGI, Institute of Science and Innovation in Mechanical and Industrial Engineering, Campus da FEUP, Rua Dr. Roberto Frias 400, 4200-465, Porto, Portugal
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Hazari MS, Phillips K, Stratford KM, Khan M, Thompson L, Oshiro W, Hudson G, Herr DW, Farraj AK. Exposure to Intermittent Noise Exacerbates the Cardiovascular Response of Wistar-Kyoto Rats to Ozone Inhalation and Arrhythmogenic Challenge. Cardiovasc Toxicol 2021; 21:336-348. [PMID: 33389603 PMCID: PMC8074345 DOI: 10.1007/s12012-020-09623-0] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 11/24/2020] [Indexed: 11/29/2022]
Abstract
Noise has become a prevalent public health problem across the world. Although there is a significant amount of data demonstrating the harmful effects of noise on the body, very little is known about how it impacts subsequent responses to other environmental stressors like air pollution, which tend to colocalize in urban centers. Therefore, this study was conducted to determine the effect of intermittent noise on cardiovascular function and subsequent responses to ozone (O3). Male Wistar-Kyoto rats implanted with radiotelemeters to non-invasively measure heart rate (HR) and blood pressure (BP), and assess heart rate variability (HRV) and baroreflex sensitivity (BRS) were kept in the quiet or exposed to intermittent white noise (85-90 dB) for one week and then exposed to either O3 (0.8 ppm) or filtered air. Left ventricular function and arrhythmia sensitivity were measured 24 h after exposure. Intermittent noise caused an initial increase in HR and BP, which decreased significantly later in the regimen and coincided with an increase in HRV and BRS. Noise caused HR and BP to be significantly elevated early during O3 and lower at the end when compared to animals kept in the quiet while the increased HRV and BRS persisted during the 24 h after. Lastly, noise increased arrhythmogenesis and may predispose the heart to mechanical function changes after O3. This is the first study to demonstrate that intermittent noise worsens the cardiovascular response to inhaled O3. These effects may occur due to autonomic changes and dysregulation of homeostatic controls, which persist one day after exposure to noise. Hence, co-exposure to noise should be taken into account when assessing the health effects of urban air pollution.
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Affiliation(s)
- Mehdi S Hazari
- Cardiopulmonary and Immunotoxicology Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, 109 Alexander Drive, B105, Research Triangle Park, NC, 27711, USA.
| | - Kaitlyn Phillips
- Department of Environmental Science and Engineering, Gillings School of Public Health, University of North Carolina - Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Kimberly M Stratford
- Curriculum in Toxicology and Environmental Medicine, University of North Carolina - Chapel Hill, Chapel Hill, NC, 27599, USA
| | - Malek Khan
- Inhalation Toxicology Facilities Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Leslie Thompson
- Cardiopulmonary and Immunotoxicology Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, 109 Alexander Drive, B105, Research Triangle Park, NC, 27711, USA
| | - Wendy Oshiro
- Cardiopulmonary and Immunotoxicology Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, 109 Alexander Drive, B105, Research Triangle Park, NC, 27711, USA
| | - George Hudson
- Inhalation Toxicology Facilities Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - David W Herr
- Neurological and Endocrine Toxicology Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, Research Triangle Park, NC, 27711, USA
| | - Aimen K Farraj
- Cardiopulmonary and Immunotoxicology Branch, Public Health and Integrated Toxicology Division, Center for Public Health and Environmental Assessment, U.S. Environmental Protection Agency, 109 Alexander Drive, B105, Research Triangle Park, NC, 27711, USA
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Comparison of nonparametric and parametric methods for time-frequency heart rate variability analysis in a rodent model of cardiovascular disease. PLoS One 2020; 15:e0242147. [PMID: 33166366 PMCID: PMC7652293 DOI: 10.1371/journal.pone.0242147] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2020] [Accepted: 10/27/2020] [Indexed: 11/19/2022] Open
Abstract
The aim of time-varying heart rate variability spectral analysis is to detect and quantify changes in the heart rate variability spectrum components during nonstationary events. Of the methods available, the nonparametric short-time Fourier Transform and parametric time-varying autoregressive modeling are the most commonly employed. The current study (1) compares short-time Fourier Transform and autoregressive modeling methods influence on heart rate variability spectral characteristics over time and during an experimental ozone exposure in mature adult spontaneously hypertensive rats, (2) evaluates the agreement between short-time Fourier Transform and autoregressive modeling method results, and (3) describes the advantages and disadvantages of each method. Although similar trends were detected during ozone exposure, statistical comparisons identified significant differences between short-time Fourier Transform and autoregressive modeling analysis results. Significant differences were observed between methods for LF power (p ≤ 0.014); HF power (p ≤ 0.011); total power (p ≤ 0.027); and normalized HF power (p = 0.05). Furthermore, inconsistencies between exposure-related observations accentuated the lack of agreement between short-time Fourier Transform and autoregressive modeling overall. Thus, the short-time Fourier Transform and autoregressive modeling methods for time-varying heart rate variability analysis could not be considered interchangeable for evaluations with or without interventions that are known to affect cardio-autonomic activity.
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Martin BL, Thompson LC, Kim YH, Snow SJ, Schladweiler MC, Phillips P, Harmon M, King C, Richards J, George I, W Kyle Martin, Haykal-Coates N, Gilmour MI, Kodavanti UP, Hazari MS, Farraj AK. A single exposure to eucalyptus smoke sensitizes rats to the postprandial cardiovascular effects of a high carbohydrate oral load. Inhal Toxicol 2020; 32:342-353. [PMID: 32838590 DOI: 10.1080/08958378.2020.1809572] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
OBJECTIVE Previous studies have shown that air pollution exposure primes the body to heightened responses to everyday stressors of the cardiovascular system. The purpose of this study was to examine the utility of postprandial responses to a high carbohydrate oral load, a cardiometabolic stressor long used to predict cardiovascular risk, in assessing the impacts of exposure to eucalyptus smoke (ES), a contributor to wildland fire air pollution in the Western coast of the United States. MATERIALS AND METHODS Three-month-old male Sprague Dawley rats were exposed once (1 h) to filtered air (FA) or ES (700 µg/m3 fine particulate matter), generated by burning eucalyptus in a tube furnace. Rats were then fasted for six hours the following morning, and subsequently administered an oral gavage of either water or a HC suspension (70 kcal% from carbohydrate), mimicking a HC meal. Two hours post gavage, cardiovascular ultrasound, cardiac pressure-volume (PV), and baroreceptor sensitivity assessments were made, and pulmonary and systemic markers assessed. RESULTS ES inhalation alone increased serum interleukin (IL)-4 and nasal airway levels of gamma glutamyl transferase. HC gavage alone increased blood glucose, blood pressure, and serum IL-6 and IL-13 compared to water vehicle. By contrast, only ES-exposed and HC-challenged animals had increased PV loop measures of cardiac output, ejection fraction %, dP/dt max, dP/dt min, and stroke work compared to ES exposure alone and/or HC challenge alone. DISCUSSION AND CONCLUSIONS Exposure to a model wildfire air pollution source modifies cardiovascular responses to HC challenge, suggesting air pollution sensitizes the body to systemic triggers.
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Affiliation(s)
- Brandi L Martin
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | - Leslie C Thompson
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Yong Ho Kim
- Oak Ridge Institute for Science and Education, Oak Ridge, TN, USA
| | - Samantha J Snow
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA.,ICF International, Durham, NC, USA
| | - Mette C Schladweiler
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Pamela Phillips
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Molly Harmon
- Curriculum of Toxicology and Environmental Medicine Division, UNC-Chapel Hill, Chapel Hill, NC, USA
| | - Charly King
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Judy Richards
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Ingrid George
- Air Methods & Characterization Division, US EPA, Research Triangle Park, NC, USA
| | - W Kyle Martin
- Curriculum of Toxicology and Environmental Medicine Division, UNC-Chapel Hill, Chapel Hill, NC, USA
| | - Najwa Haykal-Coates
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - M Ian Gilmour
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Urmila P Kodavanti
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Mehdi S Hazari
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
| | - Aimen K Farraj
- Public Health and Integrated Toxicology Division, US EPA, Research Triangle Park, NC, USA
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Martin BL, Thompson LC, Kim Y, Williams W, Snow SJ, Schladweiler MC, Phillips P, King C, Richards J, Haykal-Coates N, Higuchi M, Ian Gilmour M, Kodavanti UP, Hazari MS, Farraj AK. Acute peat smoke inhalation sensitizes rats to the postprandial cardiometabolic effects of a high fat oral load. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 643:378-391. [PMID: 29940449 PMCID: PMC7003129 DOI: 10.1016/j.scitotenv.2018.06.089] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2018] [Revised: 06/04/2018] [Accepted: 06/08/2018] [Indexed: 05/11/2023]
Abstract
Wildland fire emissions cause adverse cardiopulmonary outcomes, yet controlled exposure studies to characterize health impacts of specific biomass sources have been complicated by the often latent effects of air pollution. The aim of this study was to determine if postprandial responses after a high fat challenge, long used clinically to predict cardiovascular risk, would unmask latent cardiometabolic responses in rats exposed to peat smoke, a key wildland fire air pollution source. Male Wistar Kyoto rats were exposed once (1 h) to filtered air (FA), or low (0.36 mg/m3 particulate matter) or high concentrations (3.30 mg/m3) of peat smoke, generated by burning peat from an Irish bog. Rats were then fasted overnight, and then administered an oral gavage of a HF suspension (60 kcal% from fat), mimicking a HF meal, 24 h post-exposure. In one cohort, cardiac and superior mesenteric artery function were assessed using high frequency ultrasound 2 h post gavage. In a second cohort, circulating lipids and hormones, pulmonary and systemic inflammatory markers, and circulating monocyte phenotype using flow cytometry were assessed before or 2 or 6 h after gavage. HF gavage alone elicited increases in circulating lipids characteristic of postprandial responses to a HF meal. Few effects were evident after peat exposure in un-gavaged rats. By contrast, exposure to low or high peat caused several changes relative to FA-exposed rats 2 and 6 h post HF gavage including increased heart isovolumic relaxation time, decreased serum glucose and insulin, increased CD11 b/c-expressing blood monocytes, increased serum total cholesterol, alpha-1 acid glycoprotein, and alpha-2 macroglobulin (p = 0.063), decreased serum corticosterone, and increased lung gamma-glutamyl transferase. In summary, these findings demonstrate that a HF challenge reveals effects of air pollution that may otherwise be imperceptible, particularly at low exposure levels, and suggest exposure may sensitize the body to mild inflammatory triggers.
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Affiliation(s)
- Brandi L Martin
- Oak Ridge Institute for Science and Education, 1299 Bethel Valley Rd, Oak Ridge, TN 37830, United States
| | - Leslie C Thompson
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Yongho Kim
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Wanda Williams
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Samantha J Snow
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Mette C Schladweiler
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Pamela Phillips
- Toxicity Assessment Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, RTP, NC, United States
| | - Charly King
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Judy Richards
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Najwa Haykal-Coates
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Mark Higuchi
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - M Ian Gilmour
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Urmila P Kodavanti
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Mehdi S Hazari
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States
| | - Aimen K Farraj
- Environmental Public Health Division, US EPA, 109 TW Alexander Drive, Research Triangle Park, NC, United States.
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