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Evaluation and Characterization of Post-Stroke Lung Damage in a Murine Model of Cerebral Ischemia
oleh: Júlia Faura, Laura Ramiro, Alba Simats, Feifei Ma, Anna Penalba, Teresa Gasull, Anna Rosell, Joan Montaner, Alejandro Bustamante
| Format: | Article |
|---|---|
| Diterbitkan: | MDPI AG 2022-07-01 |
Deskripsi
After stroke and other brain injuries, there is a high incidence of respiratory complications such as pneumonia or acute lung injury. The molecular mechanisms that drive the brain-lung interaction post-stroke have not yet been elucidated. We performed transient middle cerebral artery occlusion (MCAO) and sham surgery on C57BL/6J mice and collected bronchoalveolar lavage fluid (BALF), serum, brain, and lung homogenate samples 24 h after surgery. A 92 proteins-panel developed by Olink Proteomics<sup>®</sup> was used to analyze the content in BALF and lung homogenates. MCAO animals had higher protein concentration levels in BALF than <i>sham</i>-controls, but these levels did not correlate with the infarct volume. No alteration in alveolar-capillary barrier permeability was observed. A total of 12 and 14 proteins were differentially expressed between the groups (FDR < 0.1) in BALF and lung tissue homogenates, respectively. Of those, HGF, TGF-α, and CCL2 were identified as the most relevant to this study. Their protein expression patterns were verified by ELISA. This study confirmed that post-stroke lung damage was not associated with increased lung permeability or cerebral ischemia severity. Furthermore, the dysregulation of HGF, TGF-α, and CCL2 in BALF and lung tissue after ischemia could play an important role in the molecular mechanisms underlying stroke-induced lung damage.