There are well-known anatomical and functional links between these areas. These findings indicated that brain Aβ deposition was not randomly distributed, but had characteristic patterns related to anatomical connectivity and/or functional networks. “
“Heterozygous reeler mice (HRM), haploinsufficient for reelin, have been proposed to be a genetic mouse model of schizophrenia. Beside behavioural similarities, selleck screening library HRM also demonstrate several neuroanatomical traits similar to patients suffering from schizophrenia. In the present study using immunocytochemical procedures, we investigated HRM and
wild-type mice (WT) for differences in the numbers and densities of glutamic acid decarboxylase (GAD)67 and parvalbumin (PARV)-immunoreactive (IR) neurons in the hippocampus, tyrosine hydroxylase (TH)-IR neurons Romidepsin datasheet in the ventral tegmental area (VTA) and substantia nigra (SN), and serotonin transporter (5-HT-T)-IR neurons of the raphe nuclei. We found that HRM, compared with WT, show a significant decrease of GAD67-IR neurons in hippocampal subregion CA1 [stratum pyramidale (SP)], CA2 [stratum oriens (SO), stratum
pyramidale (SP) and stratum radiatum (SR)] and dentate gyrus [granule cell layer (GL)], and also a significant decrease of PARV-containing neurons in CA1 (SO, SP) and CA2 (SP). No morphological differences were found in the SN/VTA or raphe nuclei. In conclusion, these results support a hippocampal γ-aminobutyric acid (GABA)ergic dysfunction in HRM as previously described by other authors, and may be based on a downregulation of GAD67
and PARV expressions. In summary, the reelin haploinsufficient 4-Aminobutyrate aminotransferase mouse may provide a useful model for studying the interaction between reelin and hippocampal GABAergic system, its effect on dendritic spine maturation and plasticity related to schizophrenia. “
“The dopamine (DA) terminal fields in the rat dorsal striatum (DS) and nucleus accumbens core (NAcc) are organized as patchworks of domains that exhibit distinct kinetics of DA release and clearance. The present study used fast-scan cyclic voltammetry recordings of electrically evoked DA overflow to test the hypothesis that nomifensine might exhibit domain-dependent actions within the NAcc, as we previously found to be the case within the DS. Within the NAcc, nomifensine preferentially enhanced evoked DA overflow in the slow domains compared with the fast domains. To seek a kinetic explanation for nomifensine’s selective actions, we quantified the apparent KM of DA clearance by numerically evaluating the derivative of the descending phase of the DA signal after the end of the stimulus. For comparison, we likewise quantified the apparent KM in the domains of the DS.