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. 2014 Jun 23;8(3):754–758. doi: 10.3892/etm.2014.1802

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Copyright © 2014, Spandidos Publications

This is an open-access article licensed under a Creative Commons Attribution-NonCommercial 3.0 Unported License. The article may be redistributed, reproduced, and reused for non-commercial purposes, provided the original source is properly cited.

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Plots of the average AIs of cells irradiated with 0 Gy (Control) or 50 Gy, at 7 or 21 DIV. Neurons: (A) The AI was significantly increased by 50 Gy irradiation at 7 DIV as compared with the control (n=3, P<0.001). (B) No increase in AI was identified at 21 DIV (n=8, P=0.61). Glial cells: The AI increased significantly with 50 Gy irradiation at both (C) 7 DIV and (D) 21 DIV (7 DIV, n=3, P<0.001; 21 DIV, n=4, P<0.001). The bars represent standard deviations. DIV, days in vitro; AI, apoptotic index.