Association of Heme Oxygenase 1 with Lung Protection in Malaria-Associated ALI/ARDS

Mediators Inflamm. 2016:2016:4158698. doi: 10.1155/2016/4158698. Epub 2016 Nov 15.

Abstract

Malaria is a serious disease, caused by the parasite of the genus Plasmodium, which was responsible for 440,000 deaths in 2015. Acute lung injury/acute respiratory distress syndrome (ALI/ARDS) is one of the main clinical complications in severe malaria. The murine model DBA/2 reproduces the clinical signs of ALI/ARDS in humans, when infected with Plasmodium berghei ANKA. High levels of HO-1 were reported in cases of severe malaria. Our data indicated that the HO-1 mRNA and protein expression are increased in mice that develop malaria-associated ALI/ARDS (MA-ALI/ARDS). Additionally, the hemin, a HO-1 inducing drug, prevented mice from developing MA-ALI/ARDS when administered prior to the development of MA-ALI/ARDS in this model. Also, hemin treatment showed an amelioration of respiratory parameters in mice, high VEGF levels in the sera, and a decrease in vascular permeability in the lung, which are signs of ALI/ARDS. Therefore, the induction of HO-1 before the development of MA-ALI/ARDS could be protective. However, the increased expression of HO-1 on the onset of MA-ALI/ARDS development may represent an effort to revert the phenotype of this syndrome by the host. We therefore confirm that HO-1 inducing drugs could be used for prevention of MA-ALI/ARDS in humans.

MeSH terms

  • Acute Lung Injury / complications
  • Acute Lung Injury / metabolism*
  • Animals
  • Capillary Permeability
  • Cytokines / metabolism
  • Disease Models, Animal
  • Heme Oxygenase-1 / metabolism*
  • Hemin / metabolism
  • Lung / blood supply
  • Lung / metabolism*
  • Malaria / complications
  • Malaria / metabolism*
  • Male
  • Membrane Proteins / metabolism*
  • Mice
  • Mice, Inbred DBA
  • Permeability
  • Phenotype
  • Plasmodium berghei
  • Respiratory Distress Syndrome / complications
  • Respiratory Distress Syndrome / metabolism*

Substances

  • Cytokines
  • Membrane Proteins
  • Hemin
  • Heme Oxygenase-1
  • Hmox1 protein, mouse