Redox Biology (Jan 2021)

Protective function of DJ-1/PARK7 in lipopolysaccharide and ventilator-induced acute lung injury

  • Hajera Amatullah,
  • Tatiana Maron-Gutierrez,
  • Yuexin Shan,
  • Sahil Gupta,
  • James N. Tsoporis,
  • Amir K. Varkouhi,
  • Ana Paula Teixeira Monteiro,
  • Xiaolin He,
  • Jun Yin,
  • John C. Marshall,
  • Patricia R.M. Rocco,
  • Haibo Zhang,
  • Wolfgang M. Kuebler,
  • Claudia C. dos Santos

Journal volume & issue
Vol. 38
p. 101796

Abstract

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Oxidative stress is considered one of the early underlying contributors of acute lung injury (ALI) and ventilator-induced lung injury (VILI). DJ-1, also known as PARK7, has a well-established role as an antioxidant. We have previously shown maintaining oxidative balance via the ATF3-Nrf2 axis was important in protection from ALI. Here, we exclusively characterize the role of DJ-1 in sterile LPS-induced ALI and VILI. DJ-1 protein expression was increased after LPS treatment in human epithelial and endothelial cell lines and lungs of wild-type mice. DJ-1 deficient mice exhibited greater susceptibility to LPS-induced acute lung injury as demonstrated by increased cellular infiltration, augmented levels of pulmonary cytokines, enhanced ROS levels and oxidized by-products, increased pulmonary edema and cell death. In a two-hit model of LPS and mechanical ventilation (MV), DJ-1 deficient mice displayed enhanced susceptibility to inflammation and lung injury. Collectively, these results identify DJ-1 as a negative regulator of ROS and inflammation, and suggest its expression protects from sterile lung injury driven by high oxidative stress.

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