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- W2076116873 abstract "Vascular inflammation is well known for its ability to compromise the function of the blood–brain barrier (BBB). Whether inflammation on the parenchymal side of the barrier, such as that associated with Parkinson's-like dopamine (DA) neuron lesions, similarly disrupts BBB function, is unknown. We assessed BBB integrity by examining the leakage of FITC-labeled albumin or horseradish peroxidase from the vasculature into parenchyma in animals exposed to the DA neurotoxin 6-hydroxydopamine (6OHDA). Unilateral injections of 6OHDA into the striatum or the medial forebrain bundle produced increased leakage in the ipsilateral substantia nigra and striatum 10 and 34 days following 6OHDA. Microglia were markedly activated and DA neurons were reduced by the lesions. The areas of BBB leakage were associated with increased expression of P-glycoprotein and β3-integrin expression suggesting, respectively, a compensatory response to inflammation and possible angiogenesis. Behavioural studies revealed that domperidone, a DA antagonist that normally does not cross the BBB, attenuated apomorphine-induced stereotypic behaviour in animals with 6OHDA lesions. This suggests that drugs which normally have no effect in brain can enter following Parkinson-like lesions. These data suggest that the events associated with DA neuron loss compromise BBB function." @default.
- W2076116873 created "2016-06-24" @default.
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- W2076116873 date "2005-09-01" @default.
- W2076116873 modified "2023-10-01" @default.
- W2076116873 title "6-Hydroxydopamine-induced alterations in blood-brain barrier permeability" @default.
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- W2076116873 doi "https://doi.org/10.1111/j.1460-9568.2005.04281.x" @default.
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