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Loss of Endothelial Barrier Antigen Immunoreactivity in Rat Retinal Microvessels is Correlated with Clostridium perfringens Type D Epsilon Toxin-induced Damage to the Blood-Retinal Barrier.
Journal of Comparative Pathology 2018 January
Clostridium perfringens type D epsilon toxin (ETX) is a potent neurotoxin producing a severe, and often fatal, neurological disorder in ruminant livestock. Microvascular damage appears to be the fundamental action of ETX in the brain and, recently, similar vascular injury, with subsequent severe vasogenic oedema, has been reported in the retina of rats given ETX. Endothelial barrier antigen (EBA) is a useful marker of an intact blood-brain barrier in rats and it has been shown that loss of EBA immunoreactivity is correlated with ETX-induced cerebral microvascular damage in this species. This paper reports, for the first time, that loss of EBA immunoexpression also occurs in rat retinal microvessels exposed to ETX, the marked reduction in EBA immunopositivity acting as a useful marker for blood-retinal barrier breakdown produced by this neurotoxin.
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