Abstract
Distinct epithelial MDCK cell strains displaying extremes in transepithelial electrical resistance (paracellular permeability) have been established in co-culture and the subsequent cellular behaviour and formation of junctional complexes investigated. After high-density seeding, MDCK strain I and II cells in co-culture are initially randomly distributed but subsequently sort themselves out in a time-dependent manner to form separate homotypic aggregates. The final pattern of cell arrangement of homotypic aggregates depends on the relative seeding proportion of each cell type. Immunostaining of established marker proteins for junctional complexes has revealed that MDCK I and II cells differ in the degree of expression of the zonula-adherens-associated protein, E-cadherin, their cytoskeletal architecture and the junctional distribution of a desmosomal protein, and by showing subtle differences in tight junction staining for the zona-occludens-associated proteins, ZO-1 and occludin. The distinct pattern of junctional protein expression is maintained when the two MDCK strains are co-cultured; however, morphologically atypical intercellular junctions between heterotypic cells at the boundary of homotypic cell aggregates have been o...Continue Reading
Citations
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