The transmembrane protein claudin-2 mediates paracellular sodium reabsorption in the proximal tubule, but given the versatility of transcellular epithelial transport, the paracellular pathway seems ...

Tight junctions are intercellular adhesion complexes in epithelia and endothelia that control paracellular permeability. This paracellular diffusion barrier is semipermeable: it is size- and ...

A method for the quick and reliable analysis of size-selective paracellular tracer diffusion using fluorescent dextrans of different molecular weights is described. The assay could be easily adapted ...