title: [Cajal body in the neuroendocrine neurons of the paleoamygdala].
abstract: The article demonstrates the ultrastructure of Cajal body (CB) that was detected during the electron microscopic study of nucleoplasm of the neuroendocrine neurons of the paleoamygdala of the adult Wistar rats in the study of the dynamics of their functional states throughout the estrous cycle. CB is located in the nucleoplasm close to the nucleolus and appears as a polygon structure, having the size of 0.4 x 0.5 microm, consisting of twisted strands of 40 to 60 nm thickness, which are separated from each other by the material of low electron density, obviously, a continuation of the nucleoplasm. Structural association of CB with other nuclear domains--nucleoli, interchromatin granule clusters were not noticed. CB was found in neurons only at the stage of "return to the initial state", which characterizes the completion of the functional activity of neurons. The number of these neurons was increased at the stage of metestrus. They are characterized by a segregation of nucleolar components, indicating the blockade of the protein synthesis. This fact is associated with the restructuring of CB modular organization, caused by the functional state of neurons.
authors: Bashkir State University, Ufa, Russia
authors: A V
authors: AV
authors: Akhmadeyev
authors: L B
authors: LB
authors: Kalimullina
mesh_terms: D000679:Amygdala / Q000166:cytology*; D000818:Animals; D002466:Cell Nucleolus / Q000648:ultrastructure; D002843:Chromatin; D020541:Coiled Bodies / Q000648:ultrastructure*; D030762:Estrous Cycle; D005260:Female; D055099:Neuroendocrine Cells / Q000648:ultrastructure*; D051381:Rats; D017208:Rats, Wistar
chemical_list: D002843:Chromatin