A Change of intracellular calcium in E17 cortical neurons from WT, Prnp −/− or Grm5 −/− mice in response to Aβo, vehicle (Veh) or ionomycin (500 nM) was monitored by FLIPR calcium assay. Mean±sem, n=24–40 wells from 3–5 embryos per genotype.
B Quantification of calcium response induced by Aβo or vehicle (Veh) from A. *, P<0.05, **, P<0.01 ***, P<0.001; ANOVA, Tukey post-hoc pairwise comparisons.
C Quantification of calcium response induced by oligomeric Aβ (Aβo), monomeric Aβ (Aβm) or vehicle (Veh). ***, P<0.001; ANOVA, Tukey post-hoc pairwise comparisons.
D Intracellular calcium in E17 cortical neurons in response to human AD brain extracts (AD), n=25, age-matched control brain (Con), n=19 (1.5 μg total protein/ml) or ionomycin (500 nM) monitored by FLIPR calcium assay. Mean±sem, ***, P<0.001 by Repeated Measures ANOVA for 10 seconds window after AD brain extract.
E Quantification of calcium response induced by AD or Con extracts from C. Each dot is from a different brain. ***, P<0.001 by Student’s two-tailed t test.
F Correlation between AD extract-induced calcium and PrP(23-111)-interacting Aβ species is plotted. Each point is from a different brain sample. Pearson coefficient of linear correlation reported with two-tailed P.
G Calcium response induced by AD extracts preabsorbed with Fc (AD Fc) or PrPC-Fc resin (AD PrP-Fc), or Con extracts preabsorbed with Fc (Con Fc) or PrPC-Fc resin (Con PrP-Fc). *, P<0.05, **, P<0.01; ANOVA, Tukey post-hoc pairwise comparisons.
H Calcium response induced by AD or Con extracts in E17 cortical neurons from WT, Prnp−/− or Grm5−/− mice. Mean±sem, n = 3 independent embryos for each genotype. *, P<0.05, **, P<0.01; ANOVA, Tukey post-hoc comparisons.
I Calcium response induced by AD or Con extracts in WT cortical neurons. Neurons were pretreated with 100 μM MPEP, 100 μM MTEP, 10 μM MPMQ, 500 nM saracatinib for 1 h or 100 nM thapsigargin for 24 h prior to AD extract. *, P<0.05, **, P<0.01, ***, P<0.001; ANOVA, Tukey post-hoc pairwise comparisons to AD extract only samples.
J WT cortical neurons were treated with 0 or 1 μM Aβo for 15 min. Indicated sample was treated with 100 nM thapsigargin for 24 h prior to Aβo. Lysates were analyzed by anti-phospho-SFK or anti-Fyn immunoblot.
K Quantification of phospho-SFK level in the lysate normalized to Fyn from 3 experiments. Mean±sem, *, P<0.05; **, P<0.01; ANOVA, Tukey post-hoc pairwise comparisons.
See also .