Abstract
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Novel therapies and biomarkers are
needed for the treatment of
acute ischemic stroke (AIS). This study aimed to provide comprehensive
insights into the dynamic proteome changes and underlying molecular
mechanisms post-ischemic stroke. TMT-coupled proteomic analysis was
conducted on mouse brain cortex tissue from five time points up to
4 weeks poststroke in the distal hypoxic-middle cerebral artery occlusion
(DH-MCAO) model. We found that nearly half of the detected proteome
was altered following stroke, but only ∼8.6% of the changes
were at relatively large scales. Clustering on the changed proteome
defined four distinct expression patterns characterized by temporal
and quantitative changes in innate and adaptive immune response pathways
and cytoskeletal and neuronal remodeling. Further analysis on a subset
of 309 “top hits”, which temporally responded to stroke
with relatively large and sustained changes, revealed that they were
mostly secreted proteins, highly correlated to different cortical
cytokines, and thereby potential pharmacodynamic biomarker candidates
for inflammation-targeting therapies. Closer examination of the top
enriched neurophysiologic pathways identified 57 proteins potentially
associated with poststroke recovery. Altogether, our study generated
a rich dataset with candidate proteins worthy of further validation
as biomarkers and/or therapeutic targets for stroke. The proteomics
data are available in the PRIDE Archive with identifier PXD025077.
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