Linked Life Data

16959372

Source:http://linkedlifedata.com/resource/pubmed/id/16959372

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
11
pubmed:dateCreated
2006-10-18
pubmed:abstractText
Members of the claudin family are involved in formation of barriers that control access to the paracellular space of epithelia. Likewise, endothelium-specific claudin-5 is involved in the function of the blood-brain barrier (BBB). Here, we assessed the role of claudin-5 in non-BBB endothelial barriers using lentiviral-driven overexpression and silencing of claudin-5 in its native environment of primary vascular endothelial cells. Effects were monitored using macromolecular tracers between 342Da and 40kDa. Measurements were made both in absence and presence of transmigrating leukocytes. Freeze-fracture preparations were analyzed for effects at the ultrastructural level. We show that overexpression of claudin-5 leads to formation of elaborate networks of junction strands, which are absent in untransduced endothelial cells. Concomitantly, a modest, non-size-selective enhancement of the barrier function was observed. In contrast, silencing of endogenous claudin-5 does not influence barrier function. The efficient sealing of the endothelium during diapedesis of monocytes or granulocytes is also claudin-5 independent. Collectively, these data provide evidence for a limited contribution of claudin-5 to the barrier function of human umbilical vein endothelial cells (HUVEC), implying that, unlike selective barriers in epithelia, the barrier of non-BBB endothelium seems largely independent of claudin-directed tight junction structures.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Nov
pubmed:issn
0171-9335
pubmed:author
pubmed:issnType
Print
pubmed:volume
85
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1131-44
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
Limited contribution of claudin-5-dependent tight junction strands to endothelial barrier function.
pubmed:affiliation
Department of Medical Biochemistry, University of Amsterdam, Academic Medical Center K1-114, Meibergdreef 15, 1105 AZ Amsterdam, The Netherlands.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't