Lung aeration in experimental malaria-associated acute respiratory distress syndrome by SPECT/CT analysis

PLoS One. 2020 May 29;15(5):e0233864. doi: 10.1371/journal.pone.0233864. eCollection 2020.

Abstract

Malaria-associated acute respiratory distress syndrome (ARDS) is an inflammatory disease causing alveolar-pulmonary barrier lesion and increased vascular permeability characterized by severe hypoxemia. Computed tomography (CT), among other imaging techniques, allows the morphological and quantitative identification of lung lesions during ARDS. This study aims to identify the onset of malaria-associated ARDS development in an experimental model by imaging diagnosis. Our results demonstrated that ARDS-developing mice presented decreased gaseous exchange and pulmonary insufficiency, as shown by the SPECT/CT technique. The pulmonary aeration disturbance in ARDS-developing mice on the 5th day post infection was characterized by aerated tissues decrease and nonaerated tissue accumulation, demonstrating increased vascular permeability and pleural effusion. The SPECT/CT technique allowed the early diagnosis in the experimental model, as well as the identification of the pulmonary aeration. Notwithstanding, despite the fact that this study contributes to better understand lung lesions during malaria-associated ARDS, further imaging studies are needed.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • Disease Models, Animal
  • Lung / diagnostic imaging*
  • Malaria / complications*
  • Male
  • Mice
  • Parasitemia / complications
  • Perfusion
  • Respiratory Distress Syndrome / complications*
  • Survival Analysis
  • Technetium / metabolism
  • Tomography, Emission-Computed, Single-Photon*
  • Tomography, X-Ray Computed*

Substances

  • Technetium

Grants and funding

São Paulo Research Foundation (Fundação de Amparo à Pesquisa do Estado de São Paulo: FAPESP, Brazil), the Coordination of Improvement of Higher Level Personnel; (Coordenação de Aperfeiçoamento de Pessoal de Nível Superior: CAPES) and the National Council for Scientific and Technological Development (Conselho Nacional de Desenvolvimento Científico e Tecnológico: CNPq, Brazil) supported this research. TCQ (CNPq 131431/2017-0), LSO (CAPES and FAPESP 2013/20718-3), MKS (CAPES/ PNPD), CRFM (FAPESP 2016/07030-3), SE (FAPESP 2017/05782-8) received fellowship grants. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.