RGD Reference Report - Immunohistochemical characterization of cholecystokinin containing neurons in the rat basolateral amygdala. - Rat Genome Database

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Immunohistochemical characterization of cholecystokinin containing neurons in the rat basolateral amygdala.

Authors: Mascagni, F  McDonald, AJ 
Citation: Mascagni F and McDonald AJ, Brain Res. 2003 Jun 27;976(2):171-84.
RGD ID: 1626094
Pubmed: PMID:12763251   (View Abstract at PubMed)

Specific neuronal populations in the basolateral amygdala (ABL) exhibit immunoreactivity for distinct neuropeptides and calcium-binding proteins. In the present study, immunohistochemical techniques were used to analyze neurons in the rat ABL that contain cholecystokinin (CCK). Some pyramidal projection neurons in the anterior subdivision of the basolateral nucleus exhibited low levels of CCK immunoreactivity in rats that received injections of colchicine to interrupt axonal transport; staining was concentrated in the axon initial segments of these cells. High levels of CCK immunoreactivity were observed in two subpopulations of nonpyramidal interneurons in all nuclei of the ABL: (1) type L neurons (characterized by large somata and thick dendrites), and (2) type S neurons (characterized by small somata and thin dendrites). Dual-labeling immunofluorescence studies using confocal laser scanning microscopy revealed that many (30-40%) type L CCK+ interneurons exhibited immunoreactivity for calbindin (CB), but not for parvalbumin (PV), calretinin (CR), or vasoactive intestinal polypeptide (VIP). In contrast, there was extensive colocalization of CR and VIP with CCK in type S neurons, but no significant colocalization with CB or PV. In addition, the majority of CR and VIP interneurons exhibited colocalization of both neurochemicals. Collectively, the results of this and previous studies indicate that there are at least four distinct interneuronal subpopulations in the ABL: (1) PV+ neurons (the great majority of which are CB+); (2) SOM+ neurons (many of which are CB+ and NPY+); (3) large CCK+ neurons (some of which are CB+); and (4) small bipolar/bitufted neurons that exhibit various amounts of colocalization of CCK, VIP, and CR.



Gene Ontology Annotations    Click to see Annotation Detail View

Cellular Component

  
Object SymbolSpeciesTermQualifierEvidenceWithNotesSourceOriginal Reference(s)
CckRataxon hillock  IDA nonpyramidal neurons in the basolateral amygdalar complex after colchicine treatmentRGD 
CckRataxon initial segment  IDA nonpyramidal neurons in the basolateral amygdalar complex after colchicine treatmentRGD 
CckRatperikaryon  IDA nonpyramidal neurons in the basolateral amygdalar complexRGD 
CckRatterminal bouton  IDA nonpyramidal neurons in the basolateral amygdalar complex without colchicine treatmentRGD 

Objects Annotated

Genes (Rattus norvegicus)
Cck  (cholecystokinin)


Additional Information