title: Deficiency in intercellular communication in two established renal epithelial cell lines (LLC-PK1 and MDCK).
abstract: We have studied the cell-to-cell passage of uridine nucleotides in two renal epithelial cell lines (LLC-PK1 and MDCK) and in porcine aortic endothelial cells (PAE). All three cell types incorporated tritiated uridine. After a 3 h incubation the radioactivity was predominantly in the form of acid-soluble compounds, mainly UTP. Prelabelled LLC-PK1 or MDCK cells were unable to transfer radioactivity to added adjacent, non-labelled cells, whereas PAE cells readily formed communicating intercellular junctions, as judged by autoradiographic analysis after a 3 h co-culture period. Cell-to-cell communication in either of the renal cell lines was not promoted by treatment with dibutyryl cyclic AMP and methylisobutylxanthine. Radioactivity incorporated into the acid-insoluble pool was not available for intercellular transfer, as assessed in experiments in which cells were prelabelled 24 h before co-culture.
mesh_terms: D000818:Animals; D001011:Aorta / Q000166:cytology / Q000378:metabolism; D001345:Autoradiography; D002450:Cell Communication / Q000187:drug effects; D002460:Cell Line; D004285:Dogs; D004727:Endothelium / Q000166:cytology / Q000378:metabolism; D004847:Epithelial Cells; D004848:Epithelium / Q000378:metabolism; D007668:Kidney / Q000166:cytology* / Q000378:metabolism; D013552:Swine; D014500:Uracil Nucleotides / Q000378:metabolism*; D014529:Uridine / Q000378:metabolism
chemical_list: D014500:Uracil Nucleotides; D014529:Uridine