iNOS expression showed an increasing trend from 24 h to 2 weeks post blast for both BH and BL exposures. eNOS- and nNOS-immunoreactive bands, with a molecular weight of approximately 130 and 140 kDa, respectively, increased significantly in optical density at 24 h after BH and BL exposure (eNOS: P <0.01 and P <0.05; nNOS: P <0.05 and P <0.01), 72 h after BH and BL exposure (eNOS: P <0.01 and P <0.01; nNOS: P <0.01 and P <0.01) and 2 weeks after BH and BL exposure (eNOS: P <0.01 and P <0.01; nNOS: P <0.01 and P <0.01) compared with the sham levels (Figure 2 A, E, F).
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