Journal: Research Square
Article Title: Synaptogenesis by Cholinergic Stimulation of Astrocytes
doi: 10.21203/rs.3.rs-2566078/v1
Figure Lengend Snippet: (A-C): Primary hippocampal neurons were treated with TSP1 (5, 10 μg/mL) for 24 hours. Immunocytochemical labeling of the pre and postsynaptic proteins synaptophysin and PSD-95 was performed. Synaptophysin ( A ), PSD-95 ( B ) and overlapping pre and postsynaptic puncta (indicative of structural synapses) ( C ) were quantified and the distribution of the data is shown (the bold, dashed line represents the median; the upper and lower dotted lines represent the 75 th and 25 th percentile, respectively; n= 14–20 neurons from 5–6 coverslips). Statistical comparison of the means was performed using one-way ANOVA followed by Dunnett’s ad hoc test: *: p < 0.05 vs. control. ( D ): Astrocytes were treated for 24 hours with 1 mM carbachol or left untreated; after carbachol treatment washout astrocytes were co-cultured with hippocampal neurons for 24 hours in the presence or absence of gabapentin (15, 30 μM) to block TSP1 function in neurons. Presynaptic (synaptophysin) and postsynaptic (PSD95) puncta overlap was quantified as previously described. The distribution of the data is shown (the bold, dashed line represents the median; the upper and lower dotted lines represent the 75 th and 25 th percentile, respectively; n= 25–43 neurons from 4 independent experiments). Statistical comparison of the means was performed using one-way ANOVA followed by Bonferroni’s Multiple Comparison test. **: p < 0.01 vs. control; ##: p < 0.01, ###: p < 0.001 vs. carbachol. (A-D): The bold, dashed line represents the median; the upper and lower dotted lines represent the 75 th and 25 th percentile, respectively.
Article Snippet: The mouse monoclonal antibodies PSD95 (Clone K28/43) for immunoblotting, and NR2B (Clone N59–36) were developed by and obtained from the UC Davis/NIH Neuromab facility.
Techniques: Labeling, Comparison, Control, Cell Culture, Blocking Assay