Nejvíce citovaný článek - PubMed ID 11300732
CAMKII inhibition in the parabrachial nuclei elicits conditioned taste aversion in rats
The effect of glutamate receptor antagonists on conditioned taste aversion (CTA) was studied in rats. The association of the short-term memory of a gustatory conditioned stimulus (CS) with visceral malaise (unconditioned stimulus, US) in the CTA paradigm takes place in the parabrachial nuclei (PBN) of the brainstem. The first direct evidence of participation of glutamatergic neurotransmission in the PBN during CTA demonstrated that the extracellular level of glutamate rises during saccharin drinking (Bielavska et al. in Brain Res 887:413-417, 2000). Our results show an effect of microdialysis administration of selective GluR antagonists into the PBN on the formation of CTA engram. We used four glutamate receptor (GluR) antagonists of different types (D-AP5, MK-801 as antagonists of ionotropic GluR and L-AP3, MSPG as antagonists of metabotropic GluR). The disruptive effect of MK-801 on CTA formation in the PBN is concentration-dependent, with the greatest inhibition under the higher concentrations eliciting significant disruption. The application of D-AP5 (0.1, 1, 5 mM) did not elicit a statistically significant blockade of CTA acquisition. This indicates that the association of the US-CS in the PBN is not dependent on NMDA receptors. On the contrary, application of L-AP3 (0.1, 1, 5 mM) blocked the CS-US association.
- MeSH
- agonisté excitačních aminokyselin farmakologie MeSH
- analýza rozptylu MeSH
- antagonisté excitačních aminokyselin farmakologie MeSH
- chlorid lithný škodlivé účinky MeSH
- chování zvířat účinky léků MeSH
- chuť účinky léků fyziologie MeSH
- klasické podmiňování účinky léků fyziologie MeSH
- krysa rodu Rattus MeSH
- mozkový kmen účinky léků MeSH
- sacharin farmakologie MeSH
- učení vyhýbat se účinky léků fyziologie MeSH
- vztah mezi dávkou a účinkem léčiva MeSH
- zvířata MeSH
- Check Tag
- krysa rodu Rattus MeSH
- mužské pohlaví MeSH
- zvířata MeSH
- Publikační typ
- časopisecké články MeSH
- práce podpořená grantem MeSH
- srovnávací studie MeSH
- Názvy látek
- agonisté excitačních aminokyselin MeSH
- antagonisté excitačních aminokyselin MeSH
- chlorid lithný MeSH
- sacharin MeSH