Genetic deletion of apolipoprotein A-I increases airway hyperresponsiveness, inflammation, and collagen deposition in the lung
Journal of Lipid Research, ISSN: 0022-2275, Vol: 51, Issue: 9, Page: 2560-2570
2010
- 70Citations
- 25Captures
- 1Mentions
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Metrics Details
- Citations70
- Citation Indexes69
- 69
- CrossRef53
- Patent Family Citations1
- 1
- Captures25
- Readers25
- 25
- Mentions1
- News Mentions1
- 1
Most Recent News
Inhibitory Effect of Apolipoprotein A-I on Eosinophils in Allergic Rhinitis in vitro and in vivo
Introduction Allergic rhinitis (AR) is a worldwide prevalent condition, with a prevalence rate exceeding 10% of the population.1 Eosinophils are known to have significant involvement
Article Description
The relationship between high-density lipoprotein and pulmonary function is unclear. To determine mechanistic relationships we investigated the effects of genetic deletion of apolipoprotein A-I (apoA-I) on plasma lipids, paraoxonase (PON1), pro-inflammatory HDL (p-HDL), vasodilatation, airway hyperresponsiveness and pulmonary oxidative stress, and inflammation. ApoA-I null ( apoA-I−/− ) mice had reduced total and HDL cholesterol but increased pro-inflammatory HDL compared with C57BL/6J mice. Although PON1 protein was increased in apoA-I−/− mice, PON1 activity was decreased. ApoA-I deficiency did not alter vasodilatation of facialis arteries, but it did alter relaxation responses of pulmonary arteries. Central airway resistance was unaltered. However, airway resistance mediated by tissue dampening and elastance were increased in apoA-I−/− mice, a finding also confirmed by positive end-expiratory pressure (PEEP) studies. Inflammatory cells, collagen deposition, 3-nitrotyrosine, and 4-hydroxy-2-nonenal were increased in apoA-I−/− lungs but not oxidized phospholipids. Colocalization of 4-hydroxy-2-nonenal with transforming growth factor β-1 (TGFβ-1 was increased in apoA-I−/− lungs. Xanthine oxidase, myeloperoxidase and endothelial nitric oxide synthase were increased in apoA-I−/− lungs. Dichlorodihydrofluorescein-detectable oxidants were increased in bronchoalveolar lavage fluid (BALF) in apoA-I−/− mice. In contrast, BALF nitrite+nitrate levels were decreased in apoA-I−/− mice. These data demonstrate that apoA-I plays important roles in limiting pulmonary inflammation and oxidative stress, which if not prevented, will decrease pulmonary artery vasodilatation and increase airway hyperresponsiveness.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0022227520422862; http://dx.doi.org/10.1194/jlr.m004549; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=77956861083&origin=inward; http://www.ncbi.nlm.nih.gov/pubmed/20498409; https://linkinghub.elsevier.com/retrieve/pii/S0022227520422862; http://www.jlr.org/lookup/doi/10.1194/jlr.M004549; https://syndication.highwire.org/content/doi/10.1194/jlr.M004549; https://dx.doi.org/10.1194/jlr.m004549
Elsevier BV
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