Summary
The time course of the blood-arterial wall barrier disruption following experimental subarachnoid haemorrhage (SAH) was studied in 24 rabbits. Animals with SAH received two successive blood injections through the cisterna magna. Horseradish peroxidase (HRP) was given intravenously 30 minutes before sacrifice to assess the integrity of the barrier. In the basilar arteries taken from animals that were sacrificed 4 days after the first SAH, HRP-reaction products were diffusely observed in the subendothelial space. Three weeks following the first SAH, permeation of HRP was still observed in half of the animals. However, in animals sacrificed 7 weeks after the first SAH, no permeation of HRP into the subendothelial space was noted. Opening of the interendothelial space seemed to be the major mechanism for HRP permeation into the subendothelial space rather than transendothelial vesicular transport. Disruption of the bloodarterial wall barrier in the major cerebral arteries following SAH may play a role in the pathogenesis of vasospasm.
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Nakagomi, T., Kassell, N.F., Sasaki, T. et al. Time course of the blood-arterial wall barrier disruption following experimental subarachnoid haemorrhage. Acta neurochir 98, 176–183 (1989). https://doi.org/10.1007/BF01407345
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DOI: https://doi.org/10.1007/BF01407345