Parvalbumin-immunoreactive cells in the olfactory bulb of the pigeon: Comparison with the rat.
The olfactory bulb (OB) shows special characteristics in its phylogenetic cortical structure and synaptic pattern. In the OB, gamma-aminobutyric acid (GABA), as an inhibitory neurotransmitter, is secreted from GABAergic neurons which contain parvalbumin (a calcium-binding protein). Many studies on the distribution of parvalbumin-immunoreactive neurons in the rodent OB have been published but poorly reported in the avian OB. Therefore, in this study, we compared the structure of the OB and distribution of parvalbumin-immunoreactive neurons in the OB between the rat and pigeon using cresyl violet staining and immunohistochemistry for parvalbumin, respectively. Fundamentally, the pigeon OB showed layers like those of the rat OB; however, some layers were not clear like in the rat OB. Parvalbumin-immunoreactive neurons in the pigeon OB were predominantly distributed in the external plexiform layer like that in the rat OB; however, the neurons did not have long processes like those in the rat. Furthermore, parvalbumin-immunoreactive fibres were abundant in some layers; this finding was not shown in the rat OB. In brief, parvalbumin-immunoreactive neurons were found like those in the rat OB; however, parvalbumin-immunoreactive fibres were significantly abundant in the pigeon OB compared to those in the rat OB.
['Lee|Tae-Kyeong|TK|', 'Park|Joon Ha|JH|', 'Ahn|Ji Hyeon|JH|', 'Park|Young Eun|YE|', 'Park|Cheol Woo|CW|', 'Lee|Jae-Chul|JC|', 'Choi|Jung Hoon|JH|', 'Hwang|In Koo|IK|', 'Kim|Sunhyo|S|', 'Shim|Jaeho|J|', 'Go|Seokmin|S|', 'Lee|Eunji|E|', 'Seo|Kangmoon|K|', 'Won|Moo-Ho|MH|https://orcid.org/0000-0002-7178-6501']
D000818:Animals D048588:Benzoxazines D004396:Coloring Agents D010856:Columbidae D007150:Immunohistochemistry D008297:Male D009830:Olfactory Bulb D010320:Parvalbumins D051381:Rats D017207:Rats, Sprague-Dawley D013194:Staining and Labeling
olfactory bulb pigeon rat parvalbumin external plexiform layer