title: An unusual nucleolar ring-like structure in axotomized hamster facial motoneurons.
abstract: Structures consisting of connecting rings surrounding a fibrillar core were observed within nucleoli of developing normal and axotomized hamster facial motoneurons. A few appeared in the nucleoplasm, attached to coiled bodies. Their peculiar structure and temporal association with neuronal maturation may reflect a transient state of ribosomal RNA transcription.
mesh_terms: D000818:Animals; D001369:Axons / Q000601:surgery; D002466:Cell Nucleolus; D006224:Cricetinae; D005154:Facial Nerve / Q000648:ultrastructure; D008647:Mesocricetus; D009046:Motor Neurons / Q000648:ultrastructure*