title: Assessment of TNFalpha-induced endothelial damage through the loss of its barrier function.
abstract: Tumor necrosis factor alpha (TNFalpha) appears to be the main mediator causing the systemic manifestations of sepsis and septic shock associated with edema. In vitro it augments movement of permeability tracers across endothelial cell monolayers. Herein we describe a method which permits quantification and assessment of changes in the integrity of endothelial monolayers by measuring transendothelial flux (luminal to subluminal) of tracer macromolecules in the absence of hydrostatic and oncotic pressure gradients. The system consists of two compartments separated by a polycarbonate filter and permits highly controlled conditions.
authors.affiliation: Laboratory of Tumor Immunology, San Raffaele H Scientific Institute, Milan, Italy.
authors.forename: Elisabetta
authors.initials: E
authors.lastname: Ferrero
mesh_terms: D001671:Biochemistry / Q000379:methods*; D001692:Biological Transport; D018929:Cell Culture Techniques / Q000379:methods; D002478:Cells, Cultured; D004487:Edema; D004730:Endothelium, Vascular / Q000378:metabolism / Q000473:pathology*; D006801:Humans; D016253:Microscopy, Immunoelectron / Q000379:methods; D019408:Platelet Endothelial Cell Adhesion Molecule-1 / Q000096:biosynthesis; D011312:Pressure; D018805:Sepsis; D014409:Tumor Necrosis Factor-alpha / Q000378:metabolism*; D014471:Umbilical Veins / Q000166:cytology / Q000378:metabolism
chemical_list: D019408:Platelet Endothelial Cell Adhesion Molecule-1; D014409:Tumor Necrosis Factor-alpha