Journal
PROSTAGLANDINS LEUKOTRIENES AND ESSENTIAL FATTY ACIDS
Volume 90, Issue 4, Pages 89-98Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.plefa.2014.01.006
Keywords
15-oxo-ETE; Pulmonary artery smooth muscle cells; Apoptosis; Akt; Pulmonary arterial hypertension
Funding
- Science Foundation of Education Department of Heilongjiang Province [12511315]
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Pulmonary arterial hypertension (PAH) is a progressive condition in which remodeling of the pulmonary vasculature plays an important role. The vascular remodeling involves pulmonary arterial smooth muscle cell (PASMC) proliferation and apoptosis, which is affected by several arachidonic acid metabolites. 15-oxo-Eicosatetraenoic acid (15-oxo-ETE) is one of the metabolites. However, the biological role of 15-oxo-ETE in PASMCs remains unknown. Here we show evidence for the modulation of PASMC apoptosis by 15-oxo-ETE. We found that 15-oxo-ETE increased rat and human PASMC viability. Consistently, 15-oxo-ETE attenuated nuclear fragmentation and DNA strand breaks, decreased caspase-3 activity, reduced mitochondrial depolarization, and increased Bcl-2 expression. Interestingly, the anti-apoptotic effect of 15-oxo-ETE was lost when the Akt intracellular signaling pathway was blocked. Taken together, we have established that 15-oxo-ETE protects PASMCs against apoptosis through the Akt pathway. These results suggest that 15-oxo-ETE seems to be a potential agent for PAH controls by preventing unwanted PASMC death. (C) 2014 Elsevier Ltd. All rights reserved.
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