| First Author | Bert B | Year | 2006 |
| Journal | Behav Brain Res | Volume | 167 |
| Issue | 2 | Pages | 328-41 |
| PubMed ID | 16256213 | Mgi Jnum | J:104841 |
| Mgi Id | MGI:3612906 | Doi | 10.1016/j.bbr.2005.09.020 |
| Citation | Bert B, et al. (2006) Mice over-expressing the 5-HT(1A) receptor in cortex and dentate gyrus display exaggerated locomotor and hypothermic response to 8-OH-DPAT. Behav Brain Res 167(2):328-41 |
| abstractText | The serotonin 1A (5-HT(1A)) receptor is one of the best described receptor subtypes of the serotonergic system. Due to the complex distribution pattern, the pre- and postsynaptic localisation, the impact on various monoamines, as well as the influence on a wide range of physiological functions, the contribution of 5-HT(1A) receptors to behavioural outcomes is difficult to define. In this study, we present a new transgenic mouse model with a prominent over-expression of the 5-HT(1A) receptor in the outer cortical layers (I-III) and the dentate gyrus. Behavioural studies revealed a slight decrease in baseline motor activity of homozygous mice during the open field test. Moreover, core body temperature of male transgenic mice was significantly lower than that of wild-type mice. Pharmacological studies with the 5-HT(1A) receptor agonist 8-OH-DPAT (0.1-2.5mg/kg, i.p.) revealed an exaggerated drug response in mutant mice. 8-OH-DPAT led to a drastic decrease in motor activity in the open field and elevated plus maze test. This significant effect on motor activity became more apparent by investigating the serotonergic syndrome induced by 8-OH-DPAT. Concentration as low as 0.5mg/kg 8-OH-DPAT caused immobility in transgenic mice for 30min, head weaving behaviour, and backward walking, whereas in wild-type animals, typical behaviours of the serotonin syndrome were first observed at concentrations of 1.5mg/kg and more. In addition, the 8-OH-DPAT induced hypothermia was more pronounced in mutant mice than in wild-type animals. Therefore, these genetically modified mice represent a promising model for further investigations of the role of 5-HT(1A) receptors. |
