Abstract：
:Dopamine (DA) and serotonin (5-HT) seem to be involved in several of the effects of ethanol (EtOH). Acetaldehyde (AcH), especially in the brain, induces effects that mimic those of EtOH. The purpose of this study was to investigate the effects of local perfusion of EtOH and AcH on extracellular DA and 5-HT in the dorsal striatum of Aldh2-knockout (Aldh2-KO) and wild-type (WT) mice. Aldh2-KO mice were used as a model of aldehyde dehydrogenase 2 deficiency in humans to examine the effects of AcH. Mice were perfused with Ringer's solution (control), EtOH (100, 200, or 500mM) and AcH (100, 200, or 500μM) into the dorsal striatum. Dialysate samples were collected every 5min, and then analyzed with HPLC coupled to an ECD. We found that local perfusion with 500mM EtOH increased extracellular levels of DA (p<0.05) in both Aldh2-KO and WT mice, while 5-HT levels remain unchanged. EtOH at a dose of 200mM also increased DA in WT mice, but this was limited to a 30-40-min time-point. In contrast, perfusion with 200 and 500μM AcH decreased both DA and 5-HT (p<0.05) in Aldh2-KO mice, but this decrease was not found in WT mice at any AcH dose, indicating an effect of AcH on DA and 5-HT levels. There were no genotype effects on the basal levels of DA and 5-HT. These results indicate that high EtOH can stimulate DA, whereas high AcH can depress both DA and 5-HT in the dorsal striatum of mice.
journal_name
Neurotoxicologyjournal_title
Neurotoxicologyauthors
Jamal M,Ameno K,Miki T,Tanaka N,Ito A,Ono J,Takakura A,Kumihashi M,Kinoshita Hdoi
10.1016/j.neuro.2015.12.011subject
Has Abstractpub_date
2016-01-01 00:00:00pages
204-9eissn
0161-813Xissn
1872-9711pii
S0161-813X(15)30045-0journal_volume
52pub_type
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