Fig. 7
Photomicrographs of immunohistochemical staining of CYP1A2 in the liver of control mice and the mice exposed to 40, 42, 44, and 46°C whole body heat stress. The experiment was repeated three times and the representative pictures obtained by a digital image-capture system are shown. The arrowheads indicate the CYP1A2 positive cells in the liver of unstressed control mice (a), 40°C stressed mice (b), 42°C stressed mice (c), 44°C stressed mice (d) and 46°C stressed mice (e). f Numbers of CYP1A2+ cells in the control mice and mice after heat stress at different temperatures; at least 12-mm2 tissue sections were counted for each mouse. C unstressed controls. Significance: *P < 0.05, **P < 0.01 when compared with controls. Scale bar 50 μm