Segregated distribution of TH-immunoreactivity in olfactory glomeruli.
Atypical and typical olfactory glomeruli differ in their primary afferents, centrifugal control and in some chemically identified subpopulations of interneurones. The distribution of tyrosine hydroxylase (TH)-immunopositive neurones in the periglomerular region of both typical and atypical glomeruli has been studied using a double histochemical-immunohistochemical method. A segregated distribution of TH-immunopositive cells was found among both types of glomeruli. TH-immunolabelled cells were more abundant (p < 0.05) in the atypical glomeruli. These data suggest that some neuronal subpopulations are related to specific properties of the glomerular physiology and they have a segregated distribution in different subsets of glomeruli. Thus, catecholamines might be involved in the processing of specific olfactory cues in atypical glomeruli. This study presents new differences in the cellular composition of typical and atypical glomeruli.
Crespo
C
C
Dpto. Biología Celular y Patología, Universidad de Salamanca, Spain.
Jorge
R J
RJ
Alonso
J R
JR
Briñón
J G
JG
Arévalo
R
R
Aijón
J
J
D000110:Acetylcholinesterase / Q000378:metabolism; D000818:Animals; D002452:Cell Count; D007150:Immunohistochemistry; D008297:Male; D009474:Neurons / Q000378:metabolism; D009830:Olfactory Bulb / Q000276:immunology*; D051381:Rats; D017208:Rats, Wistar; D014446:Tyrosine 3-Monooxygenase / Q000378:metabolism*
D014446:Tyrosine 3-Monooxygenase; D000110:Acetylcholinesterase