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Specific binding of a mutated fragment of Clostridium perfringens enterotoxin to endothelial claudin-5 and its modulation of cerebral vascular permeability.

Abstract：

:The vertebrate blood-brain barrier (BBB) creates an obstacle for central nervous system-related drug delivery. Claudin-5 (Cldn5), expressed in large quantities in BBB, plays a vital role in restricting BBB permeability. The C-terminal domain of Clostridium perfringens enterotoxin (cCPE) has been verified as binding to a subset of claudins (Cldns). The Cldn5-binding cCPE194-319 variant cCPEY306W/S313H was applied in this study to investigate its ability to modulate the permeability of zebrafish larval BBB. In vitro results showed that cCPEY306W/S313H is able to bind specifically to Cldn5 in murine brain vascular endothelial (bEnd.3) cells, and is transported along with Cldn5 from the cell membrane to the cytoplasm, which in turn results in a reduction in transendothelial electrical resistance (TEER). Conversely, this effect can be reversed by removal of cCPEY306W/S313H. In an in vivo experiment, this study estimates the capability of cCPEY306W/S313H to modulate Cldn5 using a rhodamine B-Dextran dye diffusion assay in zebrafish larval BBB. The results show that cCPEY306W/S313H co-localized with Cldn5 in zebrafish cerebral vascular cells and modulated BBB permeability, resulting in dye leakage. Taken together, this study suggests that cCPEY306W/S313H has the capability - both in vitro and in vivo - to modulate BBB permeability temporarily by specific binding to Cldn5.

journal_name

Neuroscience

journal_title

Neuroscience

authors

Liao Z,Yang Z,Piontek A,Eichner M,Krause G,Li L,Piontek J,Zhang J

doi

10.1016/j.neuroscience.2016.04.013

subject

Has Abstract

pub_date

2016-07-07 00:00:00

pages

53-63

eissn

0306-4522

issn

1873-7544

pii

S0306-4522(16)30068-9

journal_volume

327

pub_type

杂志文章

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