title: Intercellular junctions and the permeability barrier in human sebaceous glands.
abstract: Human sebaceous glands were studied by electron microscopy using lanthanum tracer and freeze-fracture methods. Gap junctions but no tight junctions were found. It is suggested that the essential permeability barrier may be formed by the secreted sebaceous neutral lipid.
mesh_terms: D000328:Adult; D000368:Aged; D002463:Cell Membrane Permeability; D005614:Freeze Fracturing; D006801:Humans; D007365:Intercellular Junctions / Q000648:ultrastructure*; D007811:Lanthanum; D008297:Male; D008854:Microscopy, Electron; D012627:Sebaceous Glands / Q000502:physiology / Q000648:ultrastructure*
chemical_list: D007811:Lanthanum