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- W2029397851 abstract "Humans differing in the amount of serotonin transporter (5-HTT) are known to be differentially prone to neuropsychiatric disorders. Genetically modified mice eliciting abrogated transporter function display a number of corresponding phenotypic changes in behavioural tests. However, a characterisation of the effects of serotonergic malfunction on the day-to-day life is still missing. Yet, this is precisely what an animal model is needed for in order to be meaningful for translation into human anxiety disorders. Homozygous 5-HTT knockout mice, heterozygous 5-HTT mice, and wild-type controls were housed in groups of males of the same genotype in spacious and richly structured cages. This enriched environment allowed the animals to show a wide variety of spontaneous behavioural patterns quantified by a trained experimenter. Additionally the mice could emigrate from the cages through a tunnel and a water basin. The results revealed unaltered daily behaviour in heterozygous mice. In knockouts, however, reduced locomotion, increased socio-positive behaviour, and reduced aggressive behaviour were observed. Nevertheless, all groups showed a significant amount of aggressive behaviour and there were no differences regarding the establishment of dominance relationships, emigration, and the number of animals remaining in their groups. In a second step, pairs of heterozygous and wild-type males and pairs of knockout and wild-type males were brought together in order to assess their ability to obtain a dominant social position in a direct encounter. Heterozygous mice did not differ from wild-type mice but knockout mice were significantly inferior in obtaining the dominant position. In addition to confirming multiple effects of abolished 5-HTT function in a real life situation, this study supports the central role of the 5-HTT in the control of social interactions." @default.
- W2029397851 created "2016-06-24" @default.
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- W2029397851 date "2010-08-25" @default.
- W2029397851 modified "2023-10-14" @default.
- W2029397851 title "Social status and day-to-day behaviour of male serotonin transporter knockout mice" @default.
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- W2029397851 doi "https://doi.org/10.1016/j.bbr.2010.03.035" @default.
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