TY - JOUR
T1 - Development of monoamine systems after neonatal anoxia in rats
AU - Dell'anna, Maria Elisabetta
AU - Luthman, Johan
AU - Lindqvist, Eva
AU - Olson, Lars
PY - 1993
Y1 - 1993
N2 - Neurochemical and morphological effects of neonatal anoxia on monoamine systems were studied after 100% N2 exposure for 25 min at 30 h postnatally (postnatal day 2-P2). At 20 min after anoxia, reductions of tissue levels of cerebellar noradrenaline (NA) and striatal dopamine (DA) and metabolites were seen, while 5-hydroxyindoleacetic acid (5-HIAA) was increased in cortex and cerebellum. At P7, NA increased in cerebellum, while serotonin (5-HT) and 5-HIAA decreased in cortex and cerebellum. At P21, increased hippocampal NA and striatal homovanillic acid (HVA) were found, while striatal 5-HT decreased and 5-HIAA increased in striatum and hippocampus. At P60, striatal 3,4-dihydroxyphenylacetic acid (DOPAC) and 5-HIAA levels were found to be enhanced. No effects were seen on 5-HT, tyrosine hydroxylase, or DARPP-32 immunostaining in cortex, hippocampus, and striatum. Thus, the neonatal anoxia induced both acute and persistent neurochemical abnormalities in monoamine systems that were not accompanied by morphological changes detectable with the methods used. The monoamine alterations found could be critically connected to the behavioral disturbances observed in rats after neonatal anoxia. The findings may also be of relevance to dysfunctions seen in humans after perinatal oxygen deficiency e.g., the attention deficit hyperactivity disorder syndrome.
AB - Neurochemical and morphological effects of neonatal anoxia on monoamine systems were studied after 100% N2 exposure for 25 min at 30 h postnatally (postnatal day 2-P2). At 20 min after anoxia, reductions of tissue levels of cerebellar noradrenaline (NA) and striatal dopamine (DA) and metabolites were seen, while 5-hydroxyindoleacetic acid (5-HIAA) was increased in cortex and cerebellum. At P7, NA increased in cerebellum, while serotonin (5-HT) and 5-HIAA decreased in cortex and cerebellum. At P21, increased hippocampal NA and striatal homovanillic acid (HVA) were found, while striatal 5-HT decreased and 5-HIAA increased in striatum and hippocampus. At P60, striatal 3,4-dihydroxyphenylacetic acid (DOPAC) and 5-HIAA levels were found to be enhanced. No effects were seen on 5-HT, tyrosine hydroxylase, or DARPP-32 immunostaining in cortex, hippocampus, and striatum. Thus, the neonatal anoxia induced both acute and persistent neurochemical abnormalities in monoamine systems that were not accompanied by morphological changes detectable with the methods used. The monoamine alterations found could be critically connected to the behavioral disturbances observed in rats after neonatal anoxia. The findings may also be of relevance to dysfunctions seen in humans after perinatal oxygen deficiency e.g., the attention deficit hyperactivity disorder syndrome.
KW - Anoxia
KW - Attention deficit hyperactivity disorder
KW - Development
KW - Dopamine
KW - Monoamines
KW - Neonatal
KW - Noradrenaline
KW - Rats
KW - Serotonin
UR - http://www.scopus.com/inward/record.url?scp=0027289229&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0027289229&partnerID=8YFLogxK
U2 - 10.1016/0361-9230(93)90070-R
DO - 10.1016/0361-9230(93)90070-R
M3 - Article
C2 - 8348340
AN - SCOPUS:0027289229
VL - 32
SP - 159
EP - 170
JO - Brain Research Bulletin
JF - Brain Research Bulletin
SN - 0361-9230
IS - 2
ER -