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Role of Vasoactive Intestinal Peptide in Hyperoxia-Induced Injury of Primary Type II Alveolar Epithelial Cells

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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.

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Acknowledgements

This study was supported by the National Natural Science Foundation of China (No. 30572365)

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Authors and Affiliations

  1. Children’s Hospital of Chongqing Medical University, Yu Zhong District, Chongqing, 400014, China

    Xiaoxiao Ao, Fang Fang & Feng Xu

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  1. Xiaoxiao Ao
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  2. Fang Fang
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  3. Feng Xu
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Correspondence to Feng Xu.

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Ao, X., Fang, F. & Xu, F. Role of Vasoactive Intestinal Peptide in Hyperoxia-Induced Injury of Primary Type II Alveolar Epithelial Cells. Indian J Pediatr 78, 535–539 (2011). https://doi.org/10.1007/s12098-010-0248-1

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  • DOI: https://doi.org/10.1007/s12098-010-0248-1

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