[Ca ions in regulation of the permeability and mechanical properties of intercellular contacts of small intestinal epithelium].

The role of Ca in regulating passive permeability of alkaline cations is investigated. As it has been shown, the pathway of permeability are intercellular junctions [9-10]. An attempt was made to use permeability parameters for characterizing intercellular junctions. Forms of Ca binding and the nature of site, that discriminated ion permeation are evaluated. To develop the studies of functional peculiarities of intercellular junctions, the role of Ca in regulating the mechanical properties of intercellular junction of small intestine epithelia are investigated.