Erschienen in:
01.05.2011 | Original Article
Role of Vasoactive Intestinal Peptide in Hyperoxia-Induced Injury of Primary Type II Alveolar Epithelial Cells
verfasst von:
Xiaoxiao Ao, Fang Fang, Feng Xu
Erschienen in:
Indian Journal of Pediatrics
|
Ausgabe 5/2011
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Abstract
Objective
We investigated the effect of VIP on primary type II alveolar epithelial cells (AECIIs) upon the exposure of hyperoxia.
Methods
AECIIs were isolated and purified from premature rats and exposed to air (21% oxygen), hyperoxia(95% oxygen), VIP+air and VIP+hyperoxia, respectively. The proliferation and apoptosis of AECIIs were detected by MTT cell proliferation assay, flow cytometry and western blot. The production of intracellular reactive oxygen species (ROS) was determined by 2 ', 7'-dichloro-dihydrotestosterone fluorescein diacetate (DCFH-DA) molecular probe and the total antioxidant capacity (TAOC) by ultraviolate spectro-photometer.
Results
Cell proliferation significantly increased and apoptosis decreased upon the treatment with VIP. In addition, the level of ROS in the hyperoxia+VIP group was significantly lower than in the hyperoxia group, in contrast, TAOC was higher in the hyperoxia+VIP group than that in the hyperoxia group.
Conclusions
VIP exerts a protective role in the hyperoxia-induced oxidative stress damage in AECIIs, which probably attributed to its anti-oxidant and anti-apoptosis property.