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. 2015 Feb 12;6:20. doi: 10.3389/fneur.2015.00020

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Copyright © 2015 Miller, Shah, Aperi, Budde, Pintar, Tarima, Kurpad, Stemper and Glavaski-Joksimovic.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) or licensor are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Quantification of activated microglia and total microglia number per counting area in blast-exposed OHCs. OHCs were fixed at 72 h post-injury and stained with Iba1 (green), PI (red), and DAPI counter stain (blue). Representative confocal images of CA1 region of sham-injured (A) and blasted OHCs (B,C). Sham-injured sections (A) showed ramified, resting microglia (arrows). Low-blast (B) and high-blast (C) OHCs demonstrate increased number of activated, rounded, amoeboid microglia (arrowheads). Scale bars (A–C) 50 μm. (D) Quantification of activated microglia within ROI in CA1 area revealed significantly higher percentage of activated microglia in high-blast OHCs compared to sham controls (**P < 0.01) and compared to low-blast sections (^#P < 0.05). (E) Quantification of total number of microglial cells per counting area in CA1 region demonstrated significant decrease in OHCs exposed to low (***P < 0.001) and high blast (***P < 0.001) compared to the sham-injured OHCs. n = 5–9 sections per each experimental group.