Effect of neonatal ethanol exposure on parvalbumin-expressing GABAergic neurons of the rat medial septum and cingulate cortex.
This study was performed to determine the long-term effects of ethanol exposure during the brain growth spurt (postnatal days 4-10) on the number of parvalbumin-immunoreactive (PA+) GABAergic neurons in the adult (P60) rat medial septum and anterior cingulate cortex. Significant loss of neurons within each of these populations has previously been demonstrated following prenatal ethanol exposure. In the present study, no significant differences in the number of PA+ neurons were found in either the medial septum or the cingulate cortex when control and ethanol-exposed animals were compared. The cellular densities and volumetric measures in both brain regions were also similar in the two groups. We speculate that compensatory up-regulative mechanisms may have accounted for the protection of the PA neuronal populations in these two areas following the early neonatal exposure.
Mitchell
J J
JJ
University of Florida Brain Institute, University of Florida College of Medicine, Gainesville, FL 32610-0244, USA.
Paiva
M
M
Heaton
M B
MB
D000818:Animals; D002492:Central Nervous System Depressants / Q000494:pharmacology*; D000431:Ethanol / Q000494:pharmacology*; D005260:Female; D006179:Gyrus Cinguli / Q000187:drug effects* / Q000378:metabolism; D008297:Male; D009474:Neurons / Q000187:drug effects / Q000378:metabolism; D010320:Parvalbumins / Q000187:drug effects* / Q000378:metabolism; D011247:Pregnancy; D051381:Rats; D020665:Septum of Brain / Q000187:drug effects* / Q000378:metabolism; D005680:gamma-Aminobutyric Acid / Q000187:drug effects / Q000378:metabolism
D002492:Central Nervous System Depressants; D010320:Parvalbumins; D000431:Ethanol; D005680:gamma-Aminobutyric Acid