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The replicas were then washed liberally in TBS, blocked for 30 min and then reacted with 10 nm gold nanoparticles conjugated to goat anti-rabbit secondary antibodies (1:30, Nanoprobes, Yaphank, NY, USA) diluted in a solution containing 1% BSA and 0.1% Tween 20 made up in TBS, either for 3 h at room temperature or overnight at 4��C. Replicas were washed in TBS, then ultrapure water and mounted on 25-mesh grids. For quantitative analysis, replicas were first imaged with light microscopy to determine laminar organization and then images [http://www.selleckchem.com/products/pci-32765.html Ibrutinib order] of P-face spiny dendrites or somata were collected from the middle portion of the layers of CA1, CA3, and DG. Immunogold particle density was calculated by analyzing the number of immunogold particles on the total exposed P-face surface of the somatic or dendritic membrane using FIJI/ImageJ software package. CHEMICALS AND PHARMACOLOGICAL TOOLS Chemicals were obtained from either Sigma Aldrich (Munich, Germany) or Carl Roth (Karlsruhe, Germany). Biocytin was [http://en.wikipedia.org/wiki/MMP23B MMP23B] obtained from Life Technologies (Dunfermline, UK). Drugs were obtained from Abcam Biochemicals (Cambridge, UK) or Tocris Bioscience (Bristol, UK). Drugs were stored as 1000-fold concentrated stocks at �C80��C. Working concentrations were prepared fresh on the day in normal ACSF: DNQX 10 ��M, DL-APV 50 ��M, gabazine (SR-95531)10 ��M, Rubi-GABA 20 ��M, CGP-55845 5 ��M, and baclofen 10 ��M. STATISTICAL ANALYSIS Statistical analysis was performed with Graphpad Prism 3.0 (GraphPad Software, La Jolla, CA, USA). Group data were compared with either one-way ANOVA (parametric analysis) or Friedman (non-parametric) tests, respectively combined with Bonferroni or Dunn��s multiple comparison post-test to establish group differences. Analysis of unpaired and paired data was performed with Mann�CWhitney or Wilcoxon matched-pairs tests respectively. Data is shown as mean �� SEM throughout. Statistical significance was assumed if P [http://www.selleckchem.com/products/abt-199.html check details] reports have observed a clear laminar staining pattern for the GABAB1 subunit of the obligatory heterodimer receptor and the Kir3.2 channel subunit in the hippocampal neuropil (Fritschy et al., 1999; Sloviter et al., 1999; Kulik et al., 2003, 2006). To confirm the presence of GABABR/Kir3-mediated potassium currents in hippocampal principal cells (Dutar and Nicoll, 1988; Sol��s and Nicoll, 1992; L��scher et al., 1997; Mott et al., 1999; Booker et al., 2013) we performed extracellular stimulation of pharmacologically isolated GABABR-mediated slow IPSCs and tested the response of principal cells to the canonical GABABR agonist baclofen. To assess GABABR-mediated responses produced by synaptic release of GABA, we elicited slow IPSCs in the presence of AMPA, NMDA, and GABAA receptors antagonists (DNQX, 10 ��M; APV, 50 ��M and gabazine, 10 ��M).

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Angle3oil : Page créée avec « The replicas were then washed liberally in TBS, blocked for 30 min and then reacted with 10 nm gold nanoparticles conjugated to goat anti-rabbit secondary antibodies (1:30... »