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. 2010 Feb 10;30(6):2051–2059. doi: 10.1523/JNEUROSCI.5655-09.2010

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Copyright © 2010 the authors 0270-6474/10/302051-09$15.00/0

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Figure 4. — Low-dose ionizing irradiation transiently suppresses DGC neurogenesis. A–C, Dcx immunostaining of immature neurons in the DG of rats irradiated (rad) beginning on P21 (P21/P23) shows decreased neurogenesis at 7 d (B, arrows) versus control (A), and recovery 28 d after rad (C). D, E, BrdU labeling shows cell proliferation also recovers 4 weeks after rad at P21/P23 (E) versus control (D). BrdU was given 2 h before killing on P49. F–J, Neurogenesis examined by Dcx immunolabeling is also transiently suppressed after rad beginning on P56 (P56/P58), with knockdown after 2 d (G, arrows) and 7 d (H, arrows), partial recovery at 14 d (I, arrows), and nearly total recovery to control levels (F) after 28 d (J). Scale bar, 100 μm.