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Prostaglandins Leukot Essent Fatty Acids. 2009 Jan;80(1):1-7. doi: 10.1016/j.plefa.2008.10.001. Epub 2008 Dec 10.

Allergen-induced formation of F2-isoprostanes in a murine asthma model identifies oxidative stress in acute airway inflammation in vivo.

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1
Department of Medical Sciences, Clinical Physiology, Uppsala University, Uppsala, Sweden.

Abstract

F(2)-isoprostanes have been associated with various forms of oxidant stress. The levels of F(2)-isoprostanes in a murine asthma model were studied both in situ and in vivo and further investigated whether the formation of F(2)-isoprostanes was associated with increased ovalbumin (OVA)-induced airway inflammation after a 17-day (OVA-17) or a 24-day (OVA-24) protocol. Bronchial reactivity was assessed by using a ventilator (FlexiVent). OVA-treated animals had higher lung resistance and lung compliance compared to control groups (P<0.001). 8-Iso-PGF(2)(alpha) levels in bronchoalveolar lavage (BAL) and 8-iso-PGF(2)(alpha) immunoreactivity in lung tissue were analyzed. OVA-17 mice showed a 2.5-fold increased level of 8-iso-PGF(2)(alpha) in BAL compared to PBS-17 mice (P=0.023). Lung tissue from OVA-24 mice had more intense 8-iso-PGF(2)(alpha) staining compared to OVA-17 mice. This study showed an accumulation of F(2)-isoprostanes in acute airway inflammation and a markedly increased tissue damage caused by oxidative stress in an ongoing inflammation.

PMID:
19081714
DOI:
10.1016/j.plefa.2008.10.001
[Indexed for MEDLINE]
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