Extracellular Ca2+ directly regulates tight junctional permeability in the human cervical cell line CaSki.


Lowering extracellular calcium concentration ([Ca2+]o) increases acutely and reversibly the transepithelial electrical conductance (G(TE)) and the epithelial permeability to pyranine (Ppyr) across CaSki cultures. Effects were already observed after lowering calcium from 1.2 to 1.0 mM and were maximal at 0.1 mM. The dose-response curves were sigmoidal… (More)


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