Abstract:
:It is known that the developing serotonergic system is one of the targets of ethanol teratogenicity. Because serotonin has multiple functions in both mature and immature brains, disturbance of the serotonergic system by ethanol exposure in utero can be cause of a wide range of psychiatric problems in adulthood. In the present study, we observed serotonergic neurons in the midbrain raphe nuclei and anxiety-like behaviors which would be affected by an altered serotonergic system in adult rats prenatally exposed to ethanol. Pregnant rats were fed a liquid diet containing 2.5-5.0% (w/v) ethanol on gestational days 10-21. Their offspring were examined at 60-70 days of age. A significant decrease in the number of serotonergic cells in the midbrain raphe nuclei was shown in prenatally ethanol-exposed offspring. In an open field test, they spent more time in a central area compared to controls. Also in an elevated plus maze test, prenatally ethanol-exposed offspring spent more time on the open arms than controls. These behavioral results suggested that prenatally ethanol-exposed rats were less sensitive to anxiety. However, 44% of prenatally ethanol-exposed offspring exhibited freezing behavior on the open arms of the elevated plus maze, causing strong anxiety, compared with 0% in intact control and 12.5% in isocaloric sucrose-fed control groups. These findings suggest that prenatal ethanol exposure decreases both susceptibility and resistance of anxiety. Insufficient serotonergic actions caused by reduced serotonergic neurons in the raphe nuclei might contribute to the alterations in anxiety-related behaviors observed in our prenatally ethanol-exposed rats.
journal_name
Congenit Anom (Kyoto)journal_title
Congenital anomaliesauthors
Ohta K,Sakata-Haga H,Fukui Ydoi
10.1111/j.1741-4520.2010.00269.xsubject
Has Abstractpub_date
2010-06-01 00:00:00pages
105-14issue
2eissn
0914-3505issn
1741-4520pii
CGA269journal_volume
50pub_type
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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pub_type: 杂志文章,评审
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journal_title:Congenital anomalies
pub_type: 杂志文章,评审
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
pub_type: 杂志文章,评审
doi:10.1111/j.1741-4520.2012.00367.x
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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journal_title:Congenital anomalies
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doi:10.1111/j.1741-4520.2008.00213.x
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journal_title:Congenital anomalies
pub_type: 杂志文章,评审
doi:10.1111/j.1741-4520.2010.00307.x
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