Elevated substance P can be utilized to predict early mortality during the first week of cerebral infarction. Whether aprepitant, a substance P receptor blocker could be utilized to alleviate poststroke pneumonia which is investigated in this study. Intraluminal monofilament model of middle cerebral artery occlusion (MCAO) was constructed in C57BL/6J male mice, and the relative expression of substance P was detected in collected bronchoalveolar lavage fluid (BALF) and lung tissue homogenate at 24 hours, 48 hours, and 72 hours poststroke. On the other hand, different concentrations of aprepitant (0.5, 1, and 2 mg/kg) were atomized and inhaled into MCAO mice. Inflammation cytokines and bacterial load were detected in collected BALF and lung tissue homogenate at 72-hour poststroke, and lung injury was revealed by histological examination. Aprepitant administration decreased total proteins, total cells, neutrophils, and macrophages in BALF. The concentrations of interleukin (IL)-6, IL-1β, tumor necrosis factor-α, interferon γ, monocyte chemoattractant protein-1, and IL-10 in lung tissue homogenates were also diminished by the administration of aprepitant. In conclusion, aprepitant could attenuate poststroke pneumonia in mice suggesting its potential therapeutic use in the clinic.
Keyphrases
- middle cerebral artery
- chemotherapy induced
- upper limb
- mouse model
- internal carotid artery
- induced apoptosis
- dendritic cells
- poor prognosis
- high fat diet induced
- blood pressure
- primary care
- binding protein
- cystic fibrosis
- wastewater treatment
- metabolic syndrome
- clinical trial
- community acquired pneumonia
- respiratory failure
- risk factors
- type diabetes
- cell proliferation
- signaling pathway
- small molecule
- coronary artery disease
- extracorporeal membrane oxygenation
- mechanical ventilation
- pi k akt