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We have developed procedures that permit isolation and propagation of clonal cell cultures from the olfactory epithelium of the 5- to 7-day-old rat that appear to represent the neuroblasts that repopulate the sensory neurons in the olfactory epithelium throughout life. The cell lines we report here synthesize neuron-specific enolase, which is a neuron marker, 43-kDa growth-associated protein, a protein associated with neuronal growth cones, and carnosine, a possible olfactory neurotransmitter. In two of the cell lines we have found dose-dependent cAMP accumulation following exposure to submicromolar concentrations of chemical odorants in the medium. These two cell lines show different patterns of odorant specificity when tested against a panel of six chemicals commonly used as test odorants. We anticipate that these and similarly derived cell lines will prove valuable in studying aspects of neurogenesis and olfaction.

Cell cultures of neuroblasts from rat olfactory epithelium that show odorant responses.