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Sep
2013

Disruption of the blood-brain barrier (BBB) is a hallmark of acute inflammatory lesions in multiple sclerosis (MS) and its animal model experimental autoimmune encephalomyelitis. This disruption may precede and facilitate the infiltration of encephalitogenic T cells. The signaling events that lead to this BBB disruption are incompletely understood but appear to involve dysregulation of tight-junction proteins such as claudins.
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http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3767524PMCFound
http://dx.doi.org/10.1073/pnas.1302569110DOI ListingPossible


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Jan
2013

Experimental autoimmune encephalomyelitis (EAE), the animal model of multiple sclerosis (MS), is a T cell-mediated autoimmune condition characterized by prominent inflammation in the CNS. In this model, autoreactive T cells are primed in peripheral lymph nodes and migrate into uninflamed CNS across blood-cerebrospinal fluid barrier (BCSFB) and blood-brain barrier (BBB) to initiate inflammation. However, the molecular mechanism controlling T cell migration remains to be determined.

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Dec
1969

Alterations in blood-brain barrier (BBB) permeability are due to the disruption of the Tight Junctions (TJs), large multiprotein complexes important for the maintenance of structural integrity and for permeability of the barrier. In this experimental study we evaluated the neuroprotective role of (RS)-glucoraphanin, a glucosinolate present in Brassicaceae, notably in Tuscan black kale, and bioactivated with myrosinase enzyme (bioactive RS-GRA) (10 mg/kg/d intraperitoneally), to prevent the dysfunction of BBB, in an experimental autoimmune encephalomyelitis (EAE), a model of multiple sclerosis (MS).
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Oct
2013

The blood-brain barrier (BBB) is composed of a network of tight junctions (TJ) which interconnect cerebral endothelial cells (EC). Alterations in the TJ proteins are common in inflammatory diseases of the central nervous system (CNS) like multiple sclerosis (MS). Modulation of the BBB could thus represent a therapeutic mechanism.

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Nov
2011

In experimental autoimmune encephalomyelitis (EAE), an animal model for multiple sclerosis (MS), loss of the blood-brain barrier (BBB) tight junction (TJ) protein claudin-3 correlates with immune cell infiltration into the CNS and BBB leakiness. Here we show that sealing BBB TJs by ectopic tetracycline-regulated expression of the TJ protein claudin-1 in Tie-2 tTA//TRE-claudin-1 double transgenic C57BL/6 mice had no influence on immune cell trafficking across the BBB during EAE and furthermore did not influence the onset and severity of the first clinical disease episode. However, expression of claudin-1 did significantly reduce BBB leakiness for both blood borne tracers and endogenous plasma proteins specifically around vessels expressing claudin-1.

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