Diadenosine tetraphosphate induces tight junction disassembly thus increasing corneal epithelial permeability
نویسندگان
چکیده
منابع مشابه
Analogs of diadenosine tetraphosphate (Ap4A).
This review summarizes our knowledge of analogs and derivatives of diadenosine 5',5"'-P1,P4-tetraphosphate (Ap4A), the most extensively studied member of the dinucleoside 5',5"'-P1,Pn-polyphosphate (NpnN) family. After a short discussion of enzymes that may be responsible for the accumulation and degradation of Np4)N's in the cell, this review focuses on chemically and/or enzymatically produced...
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Diadenosine polyphosphates have been characterized as extracellular mediators controlling numerous physiological effects. In this study, diadenosine tetraphosphate, diadenosine pentaphosphate, and diadenosine hexaphosphate were isolated and identified in human myocardial tissue. Human myocardial tissue was homogenized and fractionated by affinity chromatography, displacement chromatography, ani...
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An enzyme hydrolyzing diadenosine 5’,5”’-P1,P4-tetraphosphate (Ap4A) to AMP and ATP has been purified to apparent homogeneity from mouse liver cell extracts. The isolation procedure comprised ammonium sulfate precipitation, chromatography on Sephadex G75, DEAEhellulose, blue Sepharose and AMP-Sepharose. The enzyme is a single polypeptide chain with a native M, = 64,000 with a K,,, of 1.66 PM an...
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Enterotoxigenic Escherichia coli (ETEC) causes diarrhea in travelers, young children and piglets, but the precise pathogenesis of ETEC induced diarrhea is not fully known. Recent investigations have shown that tight junction (TJ) proteins and aquaporin 3 (AQP 3) are contributing factors in bacterial diarrhea. In this study, using immunoblotting and immunohistochemistry analyses, we found that E...
متن کاملMaturation of the corneal endothelial tight junction.
Apical tight junctional formation of the rabbit corneal endothelium was examined by freeze-fracture analysis and measurement of paracellular permeability to 5(6)-carboxyfluorescein. Freeze-fracture analysis indicated that apical tight junction formation of the rabbit corneal endothelium is a dynamic process. At birth, there are few tight junctional strands present and a minimal barrier for para...
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ژورنال
عنوان ژورنال: British Journal of Pharmacology
سال: 2014
ISSN: 0007-1188
DOI: 10.1111/bph.12972