Subperineurial glia are required for normal GluRIIA distribution.

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Subperineurial glia are required for normal GluRIIA distribution. Subperineurial glia are required for normal GluRIIA distribution. A–C, Confocal images of third instar NMJ branches in preparations double labeled with anti-GluRIIA in wild type (A, arrow denotes GluRIIA cluster), repo1 mutants (B), and upon expressing Repo-RNAi RNA in SPGs (C). D, Quantifications of GluRIIA volume divided by bouton volume and mean GluRIIA signal intensity in each of the indicated genotypes normalized to wild type. E–G, Confocal images of third instar larval NMJ arbors labeled with anti-HRP in wild type (E), repo1 mutants (F), and upon expressing Repo-RNAi RNA in SPGs (G). H, Quantification of total bouton number for each of the indicated genotypes. Gray and black bars indicate experiments performed at 29 and 25°C, respectively. Error bars represent SEM. *p ≤ 0.05; ***p < 0.001. Scale bar: (in C) A–C, 2 μm; E–G, 18 μm. The numbers of arbors quantified for GluRIIA parameters are as follows: 25°C, wild type, 10; repo1, 10; repo1/repoPZ, 10; 29°C, wild type, 32; rl82-Gal4/+ (driver control), 10; UAS-Repo-RNAi/+ (Repo-RNAi control), 10; and rl82-Gal4>Repo-RNAi (Repo-RNAi-glia), 10. The numbers of samples for total bouton number are as follows: 25°C, wild type, 42; repo1, 23; repo1/repoPZ, 14; 29°C, wild type, 166; driver control, 15; Repo-RNAi control, 19; and Repo-RNAi-glia, 18. Kimberly S. Kerr et al. J. Neurosci. 2014;34:2910-2920 ©2014 by Society for Neuroscience