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| Status |
Public on Jan 11, 2018 |
| Title |
Ozone-Induced Vascular Contractility and Pulmonary Injury are Differentially Impacted by Diets Enriched with Coconut Oil, Fish Oil, and Olive Oil |
| Organism |
Rattus norvegicus |
| Experiment type |
Non-coding RNA profiling by high throughput sequencing
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| Summary |
Fish oil, olive oil, and coconut oil dietary supplementation have several cardioprotective benefits, but it is not established if they can protect against air pollution-induced adverse effects. We hypothesized that these dietary supplements would attenuate ozone-induced systemic and pulmonary effects. Male Wistar Kyoto rats were fed either a normal diet, or a diet enriched with fish, olive, or coconut oil starting at 4 weeks of age for 8 weeks. Animals were then exposed to air or ozone (0.8 ppm), 4h/day for 2 consecutive days. The fish oil diet completely abolished phenylephrine-induced vasoconstriction that was increased following ozone exposure in the animals fed all other diets. Only the fish oil diet increased baseline levels of bronchoalveolar lavage fluid (BALF) markers of lung injury and inflammation. Ozone-induced pulmonary injury/inflammation were comparable in rats on normal, coconut oil, and olive oil diets with altered expression of markers in animals fed the fish oil diet. Fish oil, regardless of exposure, led to enlarged, foamy macrophages in the BALF that coincided with decreased mRNA expression of cholesterol transporters, cholesterol receptors, and nuclear receptors in the lung. Serum miRNA profile was assessed using small RNA-sequencing in normal and fish oil groups and demonstrated marked depletion of a variety of miRNAs, several of which were of splenic origin. No ozone-specific changes were noted. Collectively, these data indicate that while fish oil offered protection from ozone-induced aortic vasoconstriction, it increased pulmonary injury/inflammation and impaired lipid transport mechanisms resulting in foamy macrophage accumulation, demonstrating the need to be cognizant of potential off-target pulmonary effects that might offset the overall benefit of this vasoprotective dietary supplement.
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| Overall design |
Using an Illumina NextSeq sequencer, 24 samples were analyzed by small RNA-sequencing from the serum of 4 wk old male Wistar Kyoto rats. 4 conditions were assessed: control (normal diet), 6% by weight fish oil supplemented diet for 8 weeks, control diet plus 0.8 ppm ozone for 4h/day for 2 consecutive days, or fish oil diet plus 0.8 ppm ozone for 4h/day for 2 consecutive days. n=6 for each treatment group.
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| Contributor(s) |
Chorley BN, Carswell G, Nelson GM, Cheng W, Henriquez A, Hodge M, Bass V, Richards JE, Schladweiler MC, Ledbetter AD, Tong H, Gowdy KM, Kodavanti UP, Snow SJ |
| Citation(s) |
29329427 |
| Submission date |
Jul 28, 2017 |
| Last update date |
May 15, 2019 |
| Contact name |
Brian Norris Chorley |
| E-mail(s) |
chorley.brian@epa.gov
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| Organization name |
US Environmental Protection Agency
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| Department |
ORD
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| Lab |
NHEERL
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| Street address |
109 TW Alexander Dr
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| City |
Research Triangle Park |
| State/province |
NC |
| ZIP/Postal code |
27709 |
| Country |
USA |
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| Platforms (1) |
| GPL20084 |
Illumina NextSeq 500 (Rattus norvegicus) |
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| Samples (24)
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| Relations |
| BioProject |
PRJNA396212 |
| SRA |
SRP113778 |
| Supplementary file |
Size |
Download |
File type/resource |
| GSE102015_All_Samples_Raw_microRNA_counts.txt.gz |
22.1 Kb |
(ftp)(http) |
TXT |
| GSE102015_All_Samples_microRNA_Normalized_counts.txt.gz |
23.9 Kb |
(ftp)(http) |
TXT |
SRA Run Selector |
| Raw data are available in SRA |
| Processed data are available on Series record |
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