C3a receptor antagonist attenuates brain injury after intracerebral hemorrhage.

Journal of Cerebral Blood Flow and Metabolism : Official Journal of the International Society of Cerebral Blood Flow and Metabolism
Michal A RynkowskiE S Connolly

Abstract

Neuroprotective therapy targeting the complement cascade may reduce injury associated with intracerebral hemorrhage (ICH). We investigated the role of C3a-receptor antagonist (C3aRA) after ICH in mice. Autologous whole blood was infused into the right striatum of mice that were treated with C3aRA or vehicle, using both a pre- and postinjury dosing regimen. Hematoma volume, brain water content, and inflammatory cell profile were assessed at 72 h post-ICH. Neurologic dysfunction was assessed by evaluating both spatial memory and sensorimotor capacity. Animals pretreated with C3aRA showed significantly improved neurologic function, brain water content, and granulocyte infiltration relative to vehicle-treated animals when assessed at 72 h. There was no significant difference in hemorrhagic/nonhemorrhagic ratio of microglial activation among all groups. Hematoma volumes were also not significantly different between C3aRA-treated and vehicle-treated animals. Administration of C3aRA beginning 6 h postinjury afforded significant amelioration of neurologic dysfunction as well as a reduction in brain water content. Treatment with C3aRA improved neurologic outcome while reducing inflammatory cell infiltration and brain edema formation aft...Continue Reading

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Citations

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Methods Mentioned

BETA
Flow
flow cytometry
fluorescence-activated cell sorting
FACS

Software Mentioned

FlowJo

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