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Comparative Analysis of Cardiac Puncture and Perfusate Blood Collection for Murine Extracellular Vesicle Isolation
Jamie Cooper1, Scott Tait Airey1, Eric Patino1
1The Miami Project to Cure Paralysis, Department of Neurological Surgery, University of Miami Miller School of Medicine, Miami, FL 33136, USA.
Methods and Protocols
|March 24, 2026
Summary
Blood collection methods impact rodent extracellular vesicle (EV) studies. Cardiac puncture yields more EVs, but both methods preserve key EV signatures, ensuring reliable spinal cord injury research.
Area of Science:
- Biomedical research
- Neuroscience
- Extracellular vesicle biology
Background:
- Characterizing extracellular vesicles (EVs) in rodents is crucial for preclinical research.
- Blood collection methods can significantly influence EV yield and characteristics.
- Limited systematic comparisons exist for common rodent blood sampling techniques.
Purpose of the Study:
- To compare cardiac puncture and perfusate blood collection methods for EV analysis in mice.
- To evaluate the impact of these methods on EV yield and surface marker profiles.
- To assess method influence in both naïve and spinal cord injury (SCI) models.
Main Methods:
- Matched isolation procedures and MACSPlex immunophenotyping were used.
- Cardiac puncture plasma was analyzed alongside existing perfusate-derived datasets.
- Cohorts were matched for age, sex, weight, injury severity, and timepoint.
Main Results:
- Cardiac puncture yielded higher particle concentrations due to undiluted blood.
- Perfusate samples showed minor increases in markers like CD9, suggesting platelet-derived vesicle influence.
- Both methods produced similar EV phenotypes, with stable SCI-associated marker patterns.
Conclusions:
- EV yield differs between cardiac puncture and perfusate methods.
- Key biological signatures and SCI-related EV patterns are preserved across methods.
- Methodological transparency and standardization are vital for reproducible murine EV research.
