Abstract:
:Claudins (Cldn) are the major components of tight junctions (TJs) sealing the paracellular cleft in tissue barriers of various organs. Zebrafish Cldnb, the homolog of mammalian Cldn4, is expressed at epithelial cell-cell contacts and is important for regulating epidermal permeability. The bacterial toxin Clostridium perfringens enterotoxin (CPE) has been shown to bind to a subset of mammalian Cldns. In this study, we used the Cldn-binding C-terminal domain of CPE (194-319 amino acids, cCPE 194-319 ) to investigate its functional role in modulating zebrafish larval epidermal barriers. In vitro analyses show that cCPE 194-319 removed Cldn4 from epithelial cells and disrupted the monolayer tightness, which could be rescued by the removal of cCPE 194-319. Incubation of zebrafish larvae with cCPE 194-319 removed Cldnb specifically from the epidermal cell membrane. Dye diffusion analysis with 4-kDa fluorescent dextran indicated that the permeability of the epidermal barrier increased due to cCPE 194-319 incubation. Electron microscopic investigation revealed reversible loss of TJ integrity by Cldnb removal. Collectively, these results suggest that cCPE 194-319 could be used as a Cldnb modulator to transiently open the epidermal barrier in zebrafish. In addition, zebrafish might be used as an in vivo system to investigate the capability of cCPE to enhance drug delivery across tissue barriers.
journal_name
Exp Dermatoljournal_title
Experimental dermatologyauthors
Zhang J,Ni C,Yang Z,Piontek A,Chen H,Wang S,Fan Y,Qin Z,Piontek Jdoi
10.1111/exd.12728subject
Has Abstractpub_date
2015-08-01 00:00:00pages
605-10issue
8eissn
0906-6705issn
1600-0625journal_volume
24pub_type
杂志文章abstract::We have yet to create a human scar model that demonstrates the complex nature of hypertrophic scar and keloid formation as well as ways to prevent them despite emerging advances in our understanding of the immune system, the inflammatory response, and proteomic and genomic changes after injury. Despite more complex in...
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journal_title:Experimental dermatology
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journal_title:Experimental dermatology
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journal_title:Experimental dermatology
pub_type: 杂志文章
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journal_title:Experimental dermatology
pub_type: 临床试验,杂志文章,随机对照试验
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journal_title:Experimental dermatology
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pub_type: 杂志文章
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journal_title:Experimental dermatology
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journal_title:Experimental dermatology
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