Integrated Proteomic and Transcriptomic Analysis of Adipose Tissue-Derived Small Extracellular Vesicles in Ischemic...

Area of Science:

• Neuroscience
• Biomedical Engineering
• Regenerative Medicine

Background:

• Ischemic stroke (IS) is a debilitating neurological condition with limited therapeutic options.
• Subcutaneous adipose tissue-derived small extracellular vesicles (SAT-sEVs) are abundant, accessible, and show potential as therapeutic agents.
• Understanding the molecular cargo of SAT-sEVs is crucial for developing novel IS treatments.

Purpose of the Study:

• To investigate the therapeutic efficacy of SAT-sEVs in a rat model of ischemic stroke (middle cerebral artery occlusion - MCAO).
• To identify the roles and regulatory mechanisms of proteins and miRNAs within SAT-sEVs following ischemic injury.
• To explore innovative therapeutic strategies for IS based on SAT-sEVs.

Main Methods:

• Intravenous administration of SAT-sEVs to MCAO rats.
• Assessment of neurological function using behavioral scoring and cerebral infarction volume via TTC staining 24 hours post-administration.
• Integrated transcriptomic and proteomic analyses of SAT-sEVs from MCAO and control rats.

Main Results:

• SAT-sEVs significantly improved neurological function in MCAO rats.
• Treatment with SAT-sEVs markedly reduced the volume of cerebral infarcts.
• Ischemic injury induced significant alterations in the miRNA and protein content of SAT-sEVs.

Conclusions:

• This study elucidates the protective mechanisms of SAT-sEVs in IS.
• Significant functional and molecular changes in SAT-sEVs post-ischemia were identified.
• Findings provide a strong experimental foundation for the clinical application of SAT-sEVs in stroke rehabilitation.