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Updated: May 5, 2026
Remote Limb Ischemic Preconditioning: A Neuroprotective Technique in Rodents
Published on: June 2, 2015
Platelet-derived microparticles are implicated in remote ischemia conditioning in a rat model of cerebral infarction
Li-Yang Shan1, Ji-Zhao Li, Ling-Yun Zu
1Key Laboratory of Cardiovascular Disease and Molecular Intervention, State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China.
Aim:
Remote ischemic preconditioning protects against ischemic organ damage by giving short periods of subcritical ischemia to a remote organ. We tested the hypothesis that remote ischemic conditioning can attenuate cerebral stroke in a rat middle cerebral artery occlusion (MCAO) model by microparticles (MPs).
Methods And Results:
MPs were extracted from healthy rats that underwent hindlimb ischemia-reperfusion preconditioning (RIPC), and were transfused into rats that had undergone MCAO without RIPC. The transfusion resulted in an increase in platelet-derived MPs in blood and reduction in infarction area, confirmed by both 2-3-5-triphenyltetrazolium chloride staining and magnetic resonance imaging, albeit to a lesser degree than RIPC itself. Behavioral tests (modified Neurological Severity Score [mNSS]) were calculated to judge the behavioral change. However, no significant difference was observed after MP transfusion in 24 h or the following consecutive 9 days.
Conclusions:
RIPC induces an increase in MPs, and platelet-derived MPs may confer at least part of the remote protective effect against cerebral ischemic-reperfusion injury.
Insights
Remote ischemic conditioning, using microparticles (MPs), offers partial protection against cerebral stroke in rats. Platelet-derived MPs may mediate some of the protective effects observed in remote ischemic preconditioning.
Area of Science:
- Neuroscience
- Cardiovascular Research
- Regenerative Medicine
Background:
- Remote ischemic preconditioning (RIPC) is a protective strategy against organ damage.
- The role of microparticles (MPs) in mediating RIPC's effects is under investigation.
Purpose of the Study:
- To test if remote ischemic conditioning attenuates cerebral stroke in a rat model.
- To investigate the involvement of microparticles (MPs) in this protective mechanism.
Main Methods:
- Rats underwent middle cerebral artery occlusion (MCAO) to induce stroke.
- Microparticles (MPs) from RIPC-treated rats were transfused into MCAO rats.
- Infarction volume and neurological deficits were assessed.
Main Results:
- Transfusion of MPs reduced infarction area in MCAO rats compared to controls.
- This reduction was less pronounced than RIPC alone.
- No significant behavioral improvements were observed post-transfusion.
Conclusions:
- RIPC increases circulating microparticles (MPs).
- Platelet-derived MPs contribute to the protective effects of RIPC against cerebral ischemic-reperfusion injury.
